diff mbox series

[v8,1/2] Added Digiteq Automotive MGB4 driver

Message ID 20230704131339.2177-2-tumic@gpxsee.org
State Superseded
Headers show
Series Digiteq Automotive MGB4 driver | expand

Commit Message

Martin Tůma July 4, 2023, 1:13 p.m. UTC
From: Martin Tůma <martin.tuma@digiteqautomotive.com>

Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
video interfaces. As for now, two modules - FPD-Link and GMSL - are
available and supported by the driver. The card has two inputs and two
outputs (FPD-Link only).

In addition to the video interfaces it also provides a trigger signal
interface and a MTD interface for FPGA firmware upload.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
---
 MAINTAINERS                             |   7 +
 drivers/media/pci/Kconfig               |   1 +
 drivers/media/pci/Makefile              |   1 +
 drivers/media/pci/mgb4/Kconfig          |  17 +
 drivers/media/pci/mgb4/Makefile         |   6 +
 drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
 drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
 drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
 drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
 drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
 drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
 drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
 drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
 drivers/media/pci/mgb4/mgb4_io.h        |  33 +
 drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
 drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
 drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
 drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
 drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
 drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
 drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
 drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
 drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
 drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
 drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
 drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
 26 files changed, 4910 insertions(+)
 create mode 100644 drivers/media/pci/mgb4/Kconfig
 create mode 100644 drivers/media/pci/mgb4/Makefile
 create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
 create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
 create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h

Comments

Hans Verkuil July 26, 2023, 9:14 a.m. UTC | #1
Hi Martin,

On 04/07/2023 15:13, tumic@gpxsee.org wrote:
> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
> 
> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
> video interfaces. As for now, two modules - FPD-Link and GMSL - are
> available and supported by the driver. The card has two inputs and two
> outputs (FPD-Link only).
> 
> In addition to the video interfaces it also provides a trigger signal
> interface and a MTD interface for FPGA firmware upload.
> 
> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
> ---
>  MAINTAINERS                             |   7 +
>  drivers/media/pci/Kconfig               |   1 +
>  drivers/media/pci/Makefile              |   1 +
>  drivers/media/pci/mgb4/Kconfig          |  17 +
>  drivers/media/pci/mgb4/Makefile         |   6 +
>  drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>  drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>  drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>  drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>  drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>  drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>  drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>  drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>  drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>  drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>  drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>  drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>  drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>  drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>  drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>  drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>  drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>  26 files changed, 4910 insertions(+)
>  create mode 100644 drivers/media/pci/mgb4/Kconfig
>  create mode 100644 drivers/media/pci/mgb4/Makefile
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
> 

When I build with: make W=1 KCFLAGS=-Wmaybe-uninitialized

I get this warning:

drivers/media/pci/mgb4/mgb4_vout.c: In function 'mgb4_vout_create':
drivers/media/pci/mgb4/mgb4_vout.c:473:27: warning: variable 'video' set but not used [-Wunused-but-set-variable]
  473 |         struct mgb4_regs *video;
      |                           ^~~~~

Regards,

	Hans
Hans Verkuil July 26, 2023, 9:30 a.m. UTC | #2
On 26/07/2023 11:14, Hans Verkuil wrote:
> Hi Martin,
> 
> On 04/07/2023 15:13, tumic@gpxsee.org wrote:
>> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
>>
>> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
>> video interfaces. As for now, two modules - FPD-Link and GMSL - are
>> available and supported by the driver. The card has two inputs and two
>> outputs (FPD-Link only).
>>
>> In addition to the video interfaces it also provides a trigger signal
>> interface and a MTD interface for FPGA firmware upload.
>>
>> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
>> ---
>>  MAINTAINERS                             |   7 +
>>  drivers/media/pci/Kconfig               |   1 +
>>  drivers/media/pci/Makefile              |   1 +
>>  drivers/media/pci/mgb4/Kconfig          |  17 +
>>  drivers/media/pci/mgb4/Makefile         |   6 +
>>  drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>>  drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>>  drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>>  drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>>  drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>>  drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>>  drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>>  drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>>  drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>>  drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>>  drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>>  drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>>  drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>>  drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>>  drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>>  drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>>  26 files changed, 4910 insertions(+)
>>  create mode 100644 drivers/media/pci/mgb4/Kconfig
>>  create mode 100644 drivers/media/pci/mgb4/Makefile
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>>
> 
> When I build with: make W=1 KCFLAGS=-Wmaybe-uninitialized
> 
> I get this warning:
> 
> drivers/media/pci/mgb4/mgb4_vout.c: In function 'mgb4_vout_create':
> drivers/media/pci/mgb4/mgb4_vout.c:473:27: warning: variable 'video' set but not used [-Wunused-but-set-variable]
>   473 |         struct mgb4_regs *video;
>       |                           ^~~~~

checkpatch.pl --strict also gives a lot of warnings.

You can ignore the "line length of 131 exceeds 100 columns" warnings for the hex dump.
Those are OK in that particular case.

But the suggested renamings would be good to implement to be consistent with other
drivers.

Regarding these:

WARNING: Missing a blank line after declarations
#3340: FILE: drivers/media/pci/mgb4/mgb4_trigger.c:93:
+               u32 data;
+               s64 ts __aligned(8);

WARNING: externs should be avoided in .c files
#3340: FILE: drivers/media/pci/mgb4/mgb4_trigger.c:93:
+               s64 ts __aligned(8);

This seems to be standard iio coding style, even though checkpatch
gets confused by this. So let's leave this as-is.

Regards,

	Hans
Hans Verkuil July 26, 2023, 10:08 a.m. UTC | #3
On 04/07/2023 15:13, tumic@gpxsee.org wrote:
> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
> 
> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
> video interfaces. As for now, two modules - FPD-Link and GMSL - are
> available and supported by the driver. The card has two inputs and two
> outputs (FPD-Link only).
> 
> In addition to the video interfaces it also provides a trigger signal
> interface and a MTD interface for FPGA firmware upload.
> 
> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
> ---
>  MAINTAINERS                             |   7 +
>  drivers/media/pci/Kconfig               |   1 +
>  drivers/media/pci/Makefile              |   1 +
>  drivers/media/pci/mgb4/Kconfig          |  17 +
>  drivers/media/pci/mgb4/Makefile         |   6 +
>  drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>  drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>  drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>  drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>  drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>  drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>  drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>  drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>  drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>  drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>  drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>  drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>  drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>  drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>  drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>  drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>  drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>  26 files changed, 4910 insertions(+)
>  create mode 100644 drivers/media/pci/mgb4/Kconfig
>  create mode 100644 drivers/media/pci/mgb4/Makefile
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index bc201627c2e0..8ac4b4d6e8ca 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -6050,6 +6050,13 @@ L:	linux-gpio@vger.kernel.org
>  S:	Maintained
>  F:	drivers/gpio/gpio-gpio-mm.c
>  
> +DIGITEQ AUTOMOTIVE MGB4 V4L2 DRIVER
> +M:	Martin Tuma <martin.tuma@digiteqautomotive.com>
> +L:	linux-media@vger.kernel.org
> +S:	Maintained
> +F:	Documentation/admin-guide/media/mgb4.rst
> +F:	drivers/media/pci/mgb4/
> +
>  DIOLAN U2C-12 I2C DRIVER
>  M:	Guenter Roeck <linux@roeck-us.net>
>  L:	linux-i2c@vger.kernel.org
> diff --git a/drivers/media/pci/Kconfig b/drivers/media/pci/Kconfig
> index 480194543d05..28cea9675d71 100644
> --- a/drivers/media/pci/Kconfig
> +++ b/drivers/media/pci/Kconfig
> @@ -13,6 +13,7 @@ if MEDIA_PCI_SUPPORT
>  if MEDIA_CAMERA_SUPPORT
>  	comment "Media capture support"
>  
> +source "drivers/media/pci/mgb4/Kconfig"
>  source "drivers/media/pci/solo6x10/Kconfig"
>  source "drivers/media/pci/sta2x11/Kconfig"
>  source "drivers/media/pci/tw5864/Kconfig"
> diff --git a/drivers/media/pci/Makefile b/drivers/media/pci/Makefile
> index 8bed619b7130..f18c7e15abe3 100644
> --- a/drivers/media/pci/Makefile
> +++ b/drivers/media/pci/Makefile
> @@ -32,6 +32,7 @@ obj-$(CONFIG_VIDEO_CX25821) += cx25821/
>  obj-$(CONFIG_VIDEO_CX88) += cx88/
>  obj-$(CONFIG_VIDEO_DT3155) += dt3155/
>  obj-$(CONFIG_VIDEO_IVTV) += ivtv/
> +obj-$(CONFIG_VIDEO_MGB4) += mgb4/
>  obj-$(CONFIG_VIDEO_SAA7134) += saa7134/
>  obj-$(CONFIG_VIDEO_SAA7164) += saa7164/
>  obj-$(CONFIG_VIDEO_SOLO6X10) += solo6x10/
> diff --git a/drivers/media/pci/mgb4/Kconfig b/drivers/media/pci/mgb4/Kconfig
> new file mode 100644
> index 000000000000..13fad15a434c
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/Kconfig
> @@ -0,0 +1,17 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +config VIDEO_MGB4
> +	tristate "Digiteq Automotive MGB4 support"
> +	depends on VIDEO_DEV && PCI && I2C && DMADEVICES && SPI && MTD && IIO
> +	select VIDEOBUF2_DMA_SG
> +	select IIO_BUFFER
> +	select IIO_TRIGGERED_BUFFER
> +	select I2C_XILINX
> +	select SPI_XILINX
> +	select MTD_SPI_NOR
> +	select XILINX_XDMA
> +	help
> +	  This is a video4linux driver for Digiteq Automotive MGB4 grabber
> +	  cards.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called mgb4.
> diff --git a/drivers/media/pci/mgb4/Makefile b/drivers/media/pci/mgb4/Makefile
> new file mode 100644
> index 000000000000..e92ead18bed0
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0
> +mgb4-objs	:= mgb4_regs.o mgb4_core.o mgb4_vin.o mgb4_vout.o \
> +               mgb4_sysfs_pci.o mgb4_sysfs_in.o mgb4_sysfs_out.o \
> +               mgb4_i2c.o mgb4_cmt.o mgb4_trigger.o mgb4_dma.o
> +
> +obj-$(CONFIG_VIDEO_MGB4) += mgb4.o
> diff --git a/drivers/media/pci/mgb4/mgb4_cmt.c b/drivers/media/pci/mgb4/mgb4_cmt.c
> new file mode 100644
> index 000000000000..b8058da48b2d
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_cmt.c
> @@ -0,0 +1,244 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * The CMT module configures the FPGA Clock Management Tile (CMT) registers. For
> + * different video signal frequencies (FPGA input signal frequencies), the FPGA
> + * CMT registers need to be adjusted for the FPGA to work properly. The values
> + * are precomputed based on formulas given by Xilinx in their FPGA documentation
> + * (which are in turn full of some magic values/tables...).
> + */
> +
> +#include <linux/types.h>
> +#include <linux/kernel.h>
> +#include "mgb4_core.h"
> +#include "mgb4_cmt.h"
> +
> +static const u16 cmt_vals_out[][15] = {
> +	{0x1208, 0x0000, 0x171C, 0x0000, 0x1E38, 0x0000, 0x11C7, 0x0000, 0x1041, 0x01BC, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x130D, 0x0080, 0x0041, 0x0090, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x9000, },
> +	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x165A, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x1187, 0x0080, 0x1041, 0x01EE, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x1186, 0x0000, 0x1555, 0x0000, 0x1AAA, 0x0000, 0x1451, 0x0000, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x134E, 0x0080, 0x0041, 0x005E, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x1619, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x179E, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x179F, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x17DF, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x8800, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x128B, 0x0080, 0x0041, 0x00DB, 0x7C01, 0x7DE9, 0xFFFF, 0x9000, 0x0100, },
> +	{0x1186, 0x0000, 0x1555, 0x0000, 0x1AAA, 0x0000, 0x1820, 0x0000, 0x0083, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1186, 0x0000, 0x1555, 0x0000, 0x1AAA, 0x0000, 0x1187, 0x0080, 0x1041, 0x01EE, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x169B, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x171C, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1186, 0x0000, 0x1555, 0x0000, 0x1AAA, 0x0000, 0x1515, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x1493, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x15D8, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x124A, 0x0080, 0x0041, 0x010D, 0x7C01, 0x7DE9, 0xFFFF, 0x9000, 0x0100, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x175D, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x1619, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x17DF, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x8800, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x17E0, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x1820, 0x0000, 0x0083, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x13D0, 0x0080, 0x0042, 0x002C, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x128B, 0x0080, 0x0041, 0x00DB, 0x7C01, 0x7DE9, 0xFFFF, 0x9000, 0x0100, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x1820, 0x0000, 0x00C3, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x134E, 0x0080, 0x0041, 0x005E, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x1515, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x175D, 0x0000, 0x00C4, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1145, 0x0000, 0x1452, 0x0080, 0x18E3, 0x0000, 0x11C7, 0x0000, 0x1041, 0x01BC, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1209, 0x0080, 0x0041, 0x013F, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x1100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1556, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x8000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x179F, 0x0080, 0x00C4, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x15D8, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1105, 0x0080, 0x1041, 0x01E8, 0x6401, 0x65E9, 0xFFFF, 0x9800, 0x1100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1820, 0x0000, 0x00C4, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x1493, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x138E, 0x0000, 0x0042, 0x005E, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x17E0, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x165A, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x175D, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x1187, 0x0080, 0x1041, 0x01EE, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x175E, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x179E, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x134E, 0x0080, 0x0041, 0x005E, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x165A, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x16DC, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x169A, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x11C7, 0x0000, 0x1041, 0x01BC, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x169B, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x1104, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x171D, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x16DB, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1146, 0x0080, 0x1041, 0x0184, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x171C, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1451, 0x0000, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x171D, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x175D, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1452, 0x0080, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x15D8, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1104, 0x0000, 0x1041, 0x01E8, 0x5801, 0x59E9, 0xFFFF, 0x9900, 0x0900, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x179F, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1515, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x17DF, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x8800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1659, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1555, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x8000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x14D3, 0x0000, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1820, 0x0000, 0x0083, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1556, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x8000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1187, 0x0080, 0x1041, 0x01EE, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1452, 0x0080, 0x0082, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x169B, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1514, 0x0000, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x17E0, 0x0080, 0x00C4, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x9000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x1515, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x10C3, 0x0000, 0x128B, 0x0080, 0x1555, 0x0000, 0x16DC, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1493, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x15D8, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x171D, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1618, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x175D, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x14D4, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1619, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x179E, 0x0000, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x179F, 0x0080, 0x00C3, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1515, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x13D0, 0x0080, 0x0042, 0x002C, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x169A, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x128B, 0x0080, 0x0041, 0x00DB, 0x7C01, 0x7DE9, 0xFFFF, 0x9000, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x169B, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1820, 0x0000, 0x00C3, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1556, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x8000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x16DB, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1411, 0x0080, 0x0042, 0x002C, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x171C, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1597, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x8000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1451, 0x0000, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x171D, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x1800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x12CC, 0x0080, 0x0041, 0x00A9, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x175D, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1452, 0x0080, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x15D8, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1900, 0x0100, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x175E, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1492, 0x0000, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x179F, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1619, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1493, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x17DF, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x8800, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x130D, 0x0080, 0x0041, 0x0090, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x17E0, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x14D3, 0x0000, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x165A, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1820, 0x0000, 0x0083, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x14D4, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
> +	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x169B, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
> +};
> +
> +static const u16 cmt_vals_in[][13] = {
> +	{0x1082, 0x0000, 0x5104, 0x0000, 0x11C7, 0x0000, 0x1041, 0x02BC, 0x7C01, 0xFFE9, 0x9900, 0x9908, 0x8100},
> +	{0x1104, 0x0000, 0x9208, 0x0000, 0x138E, 0x0000, 0x1041, 0x015E, 0x7C01, 0xFFE9, 0x0100, 0x0908, 0x1000},
> +};
> +
> +static const u32 cmt_addrs_out[][15] = {
> +	{0x420, 0x424, 0x428, 0x42C, 0x430, 0x434, 0x450, 0x454, 0x458, 0x460, 0x464, 0x468, 0x4A0, 0x538, 0x53C},
> +	{0x620, 0x624, 0x628, 0x62C, 0x630, 0x634, 0x650, 0x654, 0x658, 0x660, 0x664, 0x668, 0x6A0, 0x738, 0x73C},
> +};
> +
> +static const u32 cmt_addrs_in[][13] = {
> +	{0x020, 0x024, 0x028, 0x02C, 0x050, 0x054, 0x058, 0x060, 0x064, 0x068, 0x0A0, 0x138, 0x13C},
> +	{0x220, 0x224, 0x228, 0x22C, 0x250, 0x254, 0x258, 0x260, 0x264, 0x268, 0x2A0, 0x338, 0x33C},
> +};
> +
> +static const u32 cmt_freq[] = {
> +	25000, 25510, 26020, 26530, 26983, 27551, 28000, 28570,
> +	29046, 29522, 30000, 30476, 30952, 31546, 32000, 32539,
> +	33035, 33571, 33928, 34522, 35000, 35428, 36000, 36571,
> +	36904, 37500, 38093, 38571, 39047, 39453, 40000, 40476,
> +	40952, 41494, 41964, 42857, 43535, 44047, 44444, 45000,
> +	45535, 46029, 46428, 46823, 47617, 48214, 48571, 49107,
> +	49523, 50000, 50476, 50892, 51428, 52380, 53333, 53967,
> +	54285, 55238, 55555, 55952, 57142, 58095, 58571, 59047,
> +	59521, 60000, 60316, 60952, 61428, 61904, 62500, 63092,
> +	63491, 64282, 65078, 65476, 66071, 66664, 67142, 67854,
> +	68571, 69044, 69642, 70000, 71425, 72616, 73214, 73808,
> +	74285, 75000, 75714, 76187, 76785, 77142, 78570, 80000,
> +	80357, 80951, 81428, 82142, 82857, 83332, 83928, 84285,
> +	85713, 87142, 87500, 88094, 88571, 89285, 90000, 90475,
> +	91071, 91428, 92856, 94642,
> +};
> +
> +static size_t freq_srch(u32 key, const u32 *array, size_t size)
> +{
> +	int l = 0;
> +	int r = size - 1;
> +	int m;
> +
> +	while (l <= r) {
> +		m = (l + r) / 2;
> +		if (array[m] < key)
> +			l = m + 1;
> +		else if (array[m] > key)
> +			r = m - 1;
> +		else
> +			return m;
> +	}
> +
> +	if (r < 0 || l > size - 1)
> +		return m;
> +	else
> +		return (abs(key - array[l]) < abs(key - array[r])) ? l : r;
> +}
> +
> +u32 mgb4_cmt_set_vout_freq(struct mgb4_vout_dev *voutdev, unsigned int freq)
> +{
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +	const struct mgb4_vout_regs *regs = &voutdev->config->regs;
> +	const u16 *reg_set;
> +	const u32 *addr;
> +	u32 config;
> +	size_t i, index;
> +
> +	index = freq_srch(freq, cmt_freq, ARRAY_SIZE(cmt_freq));
> +	addr = cmt_addrs_out[voutdev->config->id];
> +	reg_set = cmt_vals_out[index];
> +
> +	config = mgb4_read_reg(video, regs->config);
> +
> +	mgb4_write_reg(video, regs->config, 0x1 | (config & ~0x3));
> +
> +	for (i = 0; i < ARRAY_SIZE(cmt_addrs_out[0]); i++)
> +		mgb4_write_reg(&voutdev->mgbdev->cmt, addr[i], reg_set[i]);
> +
> +	mgb4_mask_reg(video, regs->config, 0x100, 0x100);
> +	mgb4_mask_reg(video, regs->config, 0x100, 0x0);
> +
> +	mgb4_write_reg(video, regs->config, config & ~0x1);
> +
> +	return cmt_freq[index];
> +}
> +
> +void mgb4_cmt_set_vin_freq_range(struct mgb4_vin_dev *vindev,
> +				 unsigned int freq_range)
> +{
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	const struct mgb4_vin_regs *regs = &vindev->config->regs;
> +	const u16 *reg_set;
> +	const u32 *addr;
> +	u32 config;
> +	size_t i;
> +
> +	addr = cmt_addrs_in[vindev->config->id];
> +	reg_set = cmt_vals_in[freq_range];
> +
> +	config = mgb4_read_reg(video, regs->config);
> +
> +	mgb4_write_reg(video, regs->config, 0x1 | (config & ~0x3));
> +
> +	for (i = 0; i < ARRAY_SIZE(cmt_addrs_in[0]); i++)
> +		mgb4_write_reg(&vindev->mgbdev->cmt, addr[i], reg_set[i]);
> +
> +	mgb4_mask_reg(video, regs->config, 0x1000, 0x1000);
> +	mgb4_mask_reg(video, regs->config, 0x1000, 0x0);
> +
> +	mgb4_write_reg(video, regs->config, config & ~0x1);
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_cmt.h b/drivers/media/pci/mgb4/mgb4_cmt.h
> new file mode 100644
> index 000000000000..b15df56ca059
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_cmt.h
> @@ -0,0 +1,17 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_CMT_H__
> +#define __MGB4_CMT_H__
> +
> +#include "mgb4_vout.h"
> +#include "mgb4_vin.h"
> +
> +u32 mgb4_cmt_set_vout_freq(struct mgb4_vout_dev *voutdev, unsigned int freq);
> +void mgb4_cmt_set_vin_freq_range(struct mgb4_vin_dev *vindev,
> +				 unsigned int freq_range);
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_core.c b/drivers/media/pci/mgb4/mgb4_core.c
> new file mode 100644
> index 000000000000..33ad447c1811
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_core.c
> @@ -0,0 +1,711 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * This is the driver for the MGB4 video grabber card by Digiteq Automotive.
> + *
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This is the main driver module. The DMA, I2C and SPI sub-drivers are
> + * initialized here and the input/output v4l2 devices are created.
> + *
> + * The mgb4 card uses different expansion modules for different video sources
> + * (GMSL and FPDL3 for now) so in probe() we detect the module type based on
> + * what we see on the I2C bus and check if it matches the FPGA bitstream (there
> + * are different bitstreams for different expansion modules). When no expansion
> + * module is present, we still let the driver initialize to allow flashing of
> + * the FPGA firmware using the SPI FLASH device. No v4l2 video devices are
> + * created in this case.
> + */
> +
> +#include <linux/types.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/clkdev.h>
> +#include <linux/i2c.h>
> +#include <linux/delay.h>
> +#include <linux/dma/amd_xdma.h>
> +#include <linux/platform_data/amd_xdma.h>
> +#include <linux/spi/xilinx_spi.h>
> +#include <linux/mtd/mtd.h>
> +#include <linux/hwmon.h>
> +#include <linux/debugfs.h>
> +#include "mgb4_dma.h"
> +#include "mgb4_i2c.h"
> +#include "mgb4_sysfs.h"
> +#include "mgb4_vout.h"
> +#include "mgb4_vin.h"
> +#include "mgb4_trigger.h"
> +#include "mgb4_core.h"
> +
> +#define MGB4_USER_IRQS 16
> +
> +static int flashid;
> +
> +static struct xdma_chan_info h2c_chan_info = {
> +	.dir = DMA_MEM_TO_DEV,
> +};
> +
> +static struct xdma_chan_info c2h_chan_info = {
> +	.dir = DMA_DEV_TO_MEM,
> +};
> +
> +static struct xspi_platform_data spi_platform_data = {
> +	.num_chipselect = 1,
> +	.bits_per_word = 8
> +};
> +
> +static const struct i2c_board_info extender_info = {
> +	I2C_BOARD_INFO("extender", 0x21)
> +};
> +
> +#if IS_REACHABLE(CONFIG_HWMON)
> +static umode_t temp_is_visible(const void *data, enum hwmon_sensor_types type,
> +			       u32 attr, int channel)
> +{
> +	if (type == hwmon_temp &&
> +	    (attr == hwmon_temp_input || attr == hwmon_temp_label))
> +		return 0444;
> +	else
> +		return 0;
> +}
> +
> +static int temp_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
> +		     int channel, long *val)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +	u32 val10, raw;
> +
> +	if (type == hwmon_temp && attr == hwmon_temp_input) {
> +		raw = mgb4_read_reg(&mgbdev->video, 0xD0);
> +		/* register value -> Celsius degrees formula given by Xilinx */
> +		val10 = ((((raw >> 20) & 0xFFF) * 503975) - 1118822400) / 409600;
> +		*val = val10 * 100;
> +		return 0;
> +	} else {
> +		return -EOPNOTSUPP;
> +	}

I would reverse the condition:

	if (type != hwmon_temp || attr != hwmon_temp_input)
		return -EOPNOTSUPP;
	...
	return 0;

Easier to read that way.

> +}
> +
> +static int temp_read_string(struct device *dev, enum hwmon_sensor_types type,
> +			    u32 attr, int channel, const char **str)
> +{
> +	if (type == hwmon_temp && attr == hwmon_temp_label) {
> +		*str = "FPGA Temperature";
> +		return 0;
> +	} else {
> +		return -EOPNOTSUPP;
> +	}

Ditto.

> +}
> +
> +static const struct hwmon_ops temp_ops = {
> +	.is_visible = temp_is_visible,
> +	.read = temp_read,
> +	.read_string = temp_read_string
> +};
> +
> +static const struct hwmon_channel_info *temp_channel_info[] = {
> +	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_LABEL),
> +	NULL
> +};
> +
> +static const struct hwmon_chip_info temp_chip_info = {
> +	.ops = &temp_ops,
> +	.info = temp_channel_info,
> +};
> +#endif
> +
> +static int match_i2c_adap(struct device *dev, void *data)
> +{
> +	return i2c_verify_adapter(dev) ? 1 : 0;
> +}
> +
> +static struct i2c_adapter *get_i2c_adap(struct platform_device *pdev)
> +{
> +	struct device *dev;
> +
> +	mutex_lock(&pdev->dev.mutex);
> +	dev = device_find_child(&pdev->dev, NULL, match_i2c_adap);
> +	mutex_unlock(&pdev->dev.mutex);
> +
> +	return dev ? to_i2c_adapter(dev) : NULL;
> +}
> +
> +static int match_spi_adap(struct device *dev, void *data)
> +{
> +	return to_spi_device(dev) ? 1 : 0;
> +}
> +
> +static struct spi_master *get_spi_adap(struct platform_device *pdev)
> +{
> +	struct device *dev;
> +
> +	mutex_lock(&pdev->dev.mutex);
> +	dev = device_find_child(&pdev->dev, NULL, match_spi_adap);
> +	mutex_unlock(&pdev->dev.mutex);
> +
> +	return dev ? container_of(dev, struct spi_master, dev) : NULL;
> +}
> +
> +static int init_spi(struct mgb4_dev *mgbdev)
> +{
> +	struct resource spi_resources[] = {
> +		{
> +			.start	= 0x400,
> +			.end	= 0x47f,
> +			.flags	= IORESOURCE_MEM,
> +			.name	= "io-memory",
> +		},
> +		{
> +			.start	= 14,
> +			.end	= 14,
> +			.flags	= IORESOURCE_IRQ,
> +			.name	= "irq",
> +		},
> +	};
> +	struct spi_board_info spi_info = {
> +		.max_speed_hz = 10000000,
> +		.modalias = "m25p80",
> +		.chip_select = 0,
> +		.mode = SPI_MODE_3,
> +	};
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +	struct spi_master *master;
> +	struct spi_device *spi_dev;
> +	u32 irq;
> +	int rv, id;
> +	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
> +
> +	request_module("platform:xilinx_spi");
> +
> +	irq = xdma_get_user_irq(mgbdev->xdev, 14);
> +	xdma_enable_user_irq(mgbdev->xdev, irq);
> +
> +	spi_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
> +	spi_resources[0].start += mapbase;
> +	spi_resources[0].end += mapbase;
> +	spi_resources[1].start = irq;
> +	spi_resources[1].end = irq;
> +
> +	id = pci_dev_id(pdev);
> +	mgbdev->spi_pdev = platform_device_register_resndata(dev, "xilinx_spi",
> +							     id, spi_resources,
> +							     ARRAY_SIZE(spi_resources),
> +							     &spi_platform_data,
> +							     sizeof(spi_platform_data));
> +	if (IS_ERR(mgbdev->spi_pdev)) {
> +		dev_err(dev, "failed to register SPI device\n");
> +		return PTR_ERR(mgbdev->spi_pdev);
> +	}
> +
> +	master = get_spi_adap(mgbdev->spi_pdev);
> +	if (!master) {
> +		dev_err(dev, "failed to get SPI adapter\n");
> +		rv = -EINVAL;
> +		goto err_pdev;
> +	}
> +
> +	snprintf(mgbdev->fw_part_name, sizeof(mgbdev->fw_part_name),
> +		 "mgb4-fw.%d", flashid);
> +	mgbdev->partitions[0].name = mgbdev->fw_part_name;
> +	mgbdev->partitions[0].size = 0x400000;
> +	mgbdev->partitions[0].offset = 0x400000;
> +	mgbdev->partitions[0].mask_flags = 0;
> +
> +	snprintf(mgbdev->data_part_name, sizeof(mgbdev->data_part_name),
> +		 "mgb4-data.%d", flashid);
> +	mgbdev->partitions[1].name = mgbdev->data_part_name;
> +	mgbdev->partitions[1].size = 0x10000;
> +	mgbdev->partitions[1].offset = 0xFF0000;
> +	mgbdev->partitions[1].mask_flags = MTD_CAP_NORFLASH;
> +
> +	snprintf(mgbdev->flash_name, sizeof(mgbdev->flash_name),
> +		 "mgb4-flash.%d", flashid);
> +	mgbdev->flash_data.name = mgbdev->flash_name;
> +	mgbdev->flash_data.parts = mgbdev->partitions;
> +	mgbdev->flash_data.nr_parts = ARRAY_SIZE(mgbdev->partitions);
> +	mgbdev->flash_data.type = "spi-nor";
> +
> +	spi_info.platform_data = &mgbdev->flash_data;
> +
> +	spi_dev = spi_new_device(master, &spi_info);
> +	put_device(&master->dev);
> +	if (!spi_dev) {
> +		dev_err(dev, "failed to create MTD device\n");
> +		rv = -EINVAL;
> +		goto err_pdev;
> +	}
> +
> +	return 0;
> +
> +err_pdev:
> +	platform_device_unregister(mgbdev->spi_pdev);
> +
> +	return rv;
> +}
> +
> +static void free_spi(struct mgb4_dev *mgbdev)
> +{
> +	platform_device_unregister(mgbdev->spi_pdev);
> +}
> +
> +static int init_i2c(struct mgb4_dev *mgbdev)
> +{
> +	struct resource i2c_resources[] = {
> +		{
> +			.start	= 0x200,
> +			.end	= 0x3ff,
> +			.flags	= IORESOURCE_MEM,
> +			.name	= "io-memory",
> +		},
> +		{
> +			.start	= 15,
> +			.end	= 15,
> +			.flags	= IORESOURCE_IRQ,
> +			.name	= "irq",
> +		},
> +	};
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +	char clk_name[16];
> +	u32 irq;
> +	int rv, id;
> +	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
> +
> +	request_module("platform:xiic-i2c");
> +
> +	irq = xdma_get_user_irq(mgbdev->xdev, 15);
> +	xdma_enable_user_irq(mgbdev->xdev, irq);
> +
> +	i2c_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
> +	i2c_resources[0].start += mapbase;
> +	i2c_resources[0].end += mapbase;
> +	i2c_resources[1].start = irq;
> +	i2c_resources[1].end = irq;
> +
> +	id = pci_dev_id(pdev);
> +
> +	/* create dummy clock required by the xiic-i2c adapter */
> +	snprintf(clk_name, sizeof(clk_name), "xiic-i2c.%d", id);
> +	mgbdev->i2c_clk = clk_hw_register_fixed_rate(NULL, clk_name, NULL,
> +						     0, 125000000);
> +	if (IS_ERR(mgbdev->i2c_clk)) {
> +		dev_err(dev, "failed to register I2C clock\n");
> +		return PTR_ERR(mgbdev->i2c_clk);
> +	}
> +	mgbdev->i2c_cl = clkdev_hw_create(mgbdev->i2c_clk, NULL, "xiic-i2c.%d",
> +					  id);
> +	if (!mgbdev->i2c_cl) {
> +		dev_err(dev, "failed to register I2C clockdev\n");
> +		rv = -ENOMEM;
> +		goto err_clk;
> +	}
> +
> +	mgbdev->i2c_pdev = platform_device_register_resndata(dev, "xiic-i2c",
> +							     id, i2c_resources,
> +							     ARRAY_SIZE(i2c_resources),
> +							     NULL, 0);
> +	if (IS_ERR(mgbdev->i2c_pdev)) {
> +		dev_err(dev, "failed to register I2C device\n");
> +		rv = PTR_ERR(mgbdev->i2c_pdev);
> +		goto err_clkdev;
> +	}
> +
> +	mgbdev->i2c_adap = get_i2c_adap(mgbdev->i2c_pdev);
> +	if (!mgbdev->i2c_adap) {
> +		dev_err(dev, "failed to get I2C adapter\n");
> +		rv = -EINVAL;
> +		goto err_pdev;
> +	}
> +
> +	mutex_init(&mgbdev->i2c_lock);
> +
> +	return 0;
> +
> +err_pdev:
> +	platform_device_unregister(mgbdev->i2c_pdev);
> +err_clkdev:
> +	clkdev_drop(mgbdev->i2c_cl);
> +err_clk:
> +	clk_hw_unregister(mgbdev->i2c_clk);
> +
> +	return rv;
> +}
> +
> +static void free_i2c(struct mgb4_dev *mgbdev)
> +{
> +	put_device(&mgbdev->i2c_adap->dev);
> +	platform_device_unregister(mgbdev->i2c_pdev);
> +	clkdev_drop(mgbdev->i2c_cl);
> +	clk_hw_unregister(mgbdev->i2c_clk);
> +}
> +
> +static int init_sysfs(struct pci_dev *pdev)
> +{
> +	struct device_attribute **attr, **eattr;
> +	int rv;
> +
> +	for (attr = mgb4_pci_attrs; *attr; attr++) {
> +		rv = device_create_file(&pdev->dev, *attr);
> +		if (rv < 0)
> +			goto err_file;
> +	}
> +
> +	return 0;
> +
> +err_file:
> +	for (eattr = mgb4_pci_attrs; eattr != attr; eattr++)
> +		device_remove_file(&pdev->dev, *eattr);
> +
> +	return rv;
> +}
> +
> +static void free_sysfs(struct pci_dev *pdev)
> +{
> +	struct device_attribute **attr;
> +
> +	for (attr = mgb4_pci_attrs; *attr; attr++)
> +		device_remove_file(&pdev->dev, *attr);
> +}
> +
> +static int get_serial_number(struct mgb4_dev *mgbdev)
> +{
> +	struct device *dev = &mgbdev->pdev->dev;
> +	struct mtd_info *mtd;
> +	size_t rs;
> +	int rv;
> +
> +	mgbdev->serial_number = 0;
> +
> +	mtd = get_mtd_device_nm(mgbdev->data_part_name);
> +	if (IS_ERR(mtd)) {
> +		dev_warn(dev, "failed to get data MTD device\n");
> +		return -ENOENT;
> +	}
> +	rv = mtd_read(mtd, 0, sizeof(mgbdev->serial_number), &rs,
> +		      (u_char *)&mgbdev->serial_number);
> +	put_mtd_device(mtd);
> +	if (rv < 0 || rs != sizeof(mgbdev->serial_number)) {
> +		dev_warn(dev, "error reading MTD device\n");
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int get_module_version(struct mgb4_dev *mgbdev)
> +{
> +	struct device *dev = &mgbdev->pdev->dev;
> +	struct mgb4_i2c_client extender;
> +	s32 version;
> +	u32 fw_version;
> +	int rv;
> +
> +	rv = mgb4_i2c_init(&extender, mgbdev->i2c_adap, &extender_info, 8);
> +	if (rv < 0) {
> +		dev_err(dev, "failed to create extender I2C device\n");
> +		return rv;
> +	}
> +	version = mgb4_i2c_read_byte(&extender, 0x00);
> +	mgb4_i2c_free(&extender);
> +	if (version < 0) {
> +		dev_err(dev, "error reading module version\n");
> +		return -EIO;
> +	}
> +
> +	mgbdev->module_version = ~((u32)version) & 0xff;
> +	if (!(MGB4_IS_FPDL3(mgbdev) || MGB4_IS_GMSL(mgbdev))) {
> +		dev_err(dev, "unknown module type\n");
> +		return -EINVAL;
> +	}
> +	fw_version = mgb4_read_reg(&mgbdev->video, 0xC4);
> +	if (fw_version >> 24 != mgbdev->module_version >> 4) {
> +		dev_err(dev, "module/firmware type mismatch\n");
> +		return -EINVAL;
> +	}
> +
> +	dev_info(dev, "%s module detected\n",
> +		 MGB4_IS_FPDL3(mgbdev) ? "FPDL3" : "GMSL");
> +
> +	return 0;
> +}
> +
> +static int map_regs(struct pci_dev *pdev, struct resource *res,
> +		    struct mgb4_regs *regs)
> +{
> +	int rv;
> +	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
> +
> +	res->start += mapbase;
> +	res->end += mapbase;
> +
> +	rv = mgb4_regs_map(res, regs);
> +	if (rv < 0) {
> +		dev_err(&pdev->dev, "failed to map %s registers\n", res->name);
> +		return rv;
> +	}
> +
> +	return 0;
> +}
> +
> +static int init_xdma(struct mgb4_dev *mgbdev)
> +{
> +	struct xdma_platdata data;
> +	struct resource res[2] = { 0 };
> +	struct dma_slave_map *map;
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +	int i;
> +
> +	res[0].start = pci_resource_start(pdev, MGB4_XDMA_BAR_ID);
> +	res[0].end = pci_resource_end(pdev, MGB4_XDMA_BAR_ID);
> +	res[0].flags = IORESOURCE_MEM;
> +	res[0].parent = &pdev->resource[MGB4_XDMA_BAR_ID];
> +	res[1].start = pci_irq_vector(pdev, 0);
> +	res[1].end = res[1].start + MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES
> +		     + MGB4_USER_IRQS - 1;
> +	res[1].flags = IORESOURCE_IRQ;
> +
> +	data.max_dma_channels = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
> +	data.device_map = mgbdev->slave_map;
> +	data.device_map_cnt = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
> +
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
> +		sprintf(mgbdev->channel_names[i], "c2h%d", i);
> +		map = &data.device_map[i];
> +		map->slave = mgbdev->channel_names[i];
> +		map->devname = dev_name(dev);
> +		map->param = XDMA_FILTER_PARAM(&c2h_chan_info);
> +	}
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
> +		sprintf(mgbdev->channel_names[i + MGB4_VIN_DEVICES], "h2c%d", i);
> +		map = &data.device_map[i + MGB4_VIN_DEVICES];
> +		map->slave = mgbdev->channel_names[i + MGB4_VIN_DEVICES];
> +		map->devname = dev_name(dev);
> +		map->param = XDMA_FILTER_PARAM(&h2c_chan_info);
> +	}
> +
> +	mgbdev->xdev = platform_device_register_resndata(dev, "xdma",
> +							 PLATFORM_DEVID_AUTO, res,
> +							 2, &data, sizeof(data));
> +	if (IS_ERR(mgbdev->xdev)) {
> +		dev_err(dev, "failed to register XDMA device\n");
> +		return PTR_ERR(mgbdev->xdev);
> +	}
> +
> +	return 0;
> +}
> +
> +static void free_xdma(struct mgb4_dev *mgbdev)
> +{
> +	platform_device_unregister(mgbdev->xdev);
> +}
> +
> +static int mgb4_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> +{
> +	int i, rv;
> +	struct mgb4_dev *mgbdev;
> +	struct resource video = {
> +		.start	= 0x0,
> +		.end	= 0x100,
> +		.flags	= IORESOURCE_MEM,
> +		.name	= "mgb4-video",
> +	};
> +	struct resource cmt = {
> +		.start	= 0x1000,
> +		.end	= 0x1800,
> +		.flags	= IORESOURCE_MEM,
> +		.name	= "mgb4-cmt",
> +	};
> +	int irqs = pci_msix_vec_count(pdev);
> +
> +	mgbdev = kzalloc(sizeof(*mgbdev), GFP_KERNEL);
> +	if (!mgbdev)
> +		return -ENOMEM;
> +
> +	mgbdev->pdev = pdev;
> +	pci_set_drvdata(pdev, mgbdev);
> +
> +	/* PCIe related stuff */
> +	rv = pci_enable_device(pdev);
> +	if (rv) {
> +		dev_err(&pdev->dev, "error enabling PCI device\n");
> +		goto err_mgbdev;
> +	}
> +
> +	rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
> +	if (rv)
> +		dev_warn(&pdev->dev, "error enabling PCIe relaxed ordering\n");
> +	rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_EXT_TAG);
> +	if (rv)
> +		dev_warn(&pdev->dev, "error enabling PCIe extended tag field\n");
> +	rv = pcie_set_readrq(pdev, 512);
> +	if (rv)
> +		dev_warn(&pdev->dev, "error setting PCIe max. memory read size\n");
> +	pci_set_master(pdev);
> +
> +	rv = pci_alloc_irq_vectors(pdev, irqs, irqs, PCI_IRQ_MSIX);
> +	if (rv < 0) {
> +		dev_err(&pdev->dev, "error allocating MSI-X IRQs\n");
> +		goto err_enable_pci;
> +	}
> +
> +	rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
> +	if (rv) {
> +		dev_err(&pdev->dev, "error setting DMA mask\n");
> +		goto err_enable_pci;
> +	}
> +
> +	/* DMA + IRQ engine */
> +	rv = init_xdma(mgbdev);
> +	if (rv)
> +		goto err_alloc_irq;
> +	rv = mgb4_dma_channel_init(mgbdev);
> +	if (rv)
> +		goto err_dma_chan;
> +
> +	/* mgb4 video registers */
> +	rv = map_regs(pdev, &video, &mgbdev->video);
> +	if (rv < 0)
> +		goto err_dma_chan;
> +	/* mgb4 cmt registers */
> +	rv = map_regs(pdev, &cmt, &mgbdev->cmt);
> +	if (rv < 0)
> +		goto err_video_regs;
> +
> +	/* SPI FLASH */
> +	rv = init_spi(mgbdev);
> +	if (rv < 0)
> +		goto err_cmt_regs;
> +
> +	/* I2C controller */
> +	rv = init_i2c(mgbdev);
> +	if (rv < 0)
> +		goto err_spi;
> +
> +	/* PCI card related sysfs attributes */
> +	rv = init_sysfs(pdev);
> +	if (rv < 0)
> +		goto err_i2c;
> +
> +#if IS_REACHABLE(CONFIG_HWMON)
> +	/* HWmon (card temperature) */
> +	mgbdev->hwmon_dev = hwmon_device_register_with_info(&pdev->dev, "mgb4",
> +							    mgbdev,
> +							    &temp_chip_info, 0);
> +#endif
> +
> +#ifdef CONFIG_DEBUG_FS
> +	mgbdev->debugfs = debugfs_create_dir(dev_name(&pdev->dev), NULL);
> +#endif
> +
> +	/* Get card serial number. On systems without MTD flash support we may
> +	 * get an error thus ignore the return value. An invalid serial number
> +	 * should not break anything...
> +	 */
> +	if (get_serial_number(mgbdev) < 0)
> +		dev_warn(&pdev->dev, "error reading card serial number\n");
> +
> +	/* Get module type. If no valid module is found, skip the video device
> +	 * creation part but do not exit with error to allow flashing the card.
> +	 */
> +	rv = get_module_version(mgbdev);
> +	if (rv < 0)
> +		goto exit;
> +
> +	/* Video input v4l2 devices */
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++)
> +		mgbdev->vin[i] = mgb4_vin_create(mgbdev, i);
> +
> +	/* Video output v4l2 devices */
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
> +		mgbdev->vout[i] = mgb4_vout_create(mgbdev, i);
> +
> +	/* Triggers */
> +	mgbdev->indio_dev = mgb4_trigger_create(mgbdev);
> +
> +exit:
> +	flashid++;
> +
> +	return 0;
> +
> +err_i2c:
> +	free_i2c(mgbdev);
> +err_spi:
> +	free_spi(mgbdev);
> +err_cmt_regs:
> +	mgb4_regs_free(&mgbdev->cmt);
> +err_video_regs:
> +	mgb4_regs_free(&mgbdev->video);
> +err_dma_chan:
> +	mgb4_dma_channel_free(mgbdev);
> +	free_xdma(mgbdev);
> +err_alloc_irq:
> +	pci_disable_msix(pdev);
> +err_enable_pci:
> +	pci_disable_device(pdev);
> +err_mgbdev:
> +	kfree(mgbdev);
> +
> +	return rv;
> +}
> +
> +static void mgb4_remove(struct pci_dev *pdev)
> +{
> +	struct mgb4_dev *mgbdev = pci_get_drvdata(pdev);
> +	int i;
> +
> +#ifdef CONFIG_DEBUG_FS
> +	debugfs_remove_recursive(mgbdev->debugfs);
> +#endif
> +#if IS_REACHABLE(CONFIG_HWMON)
> +	hwmon_device_unregister(mgbdev->hwmon_dev);
> +#endif
> +
> +	if (mgbdev->indio_dev)
> +		mgb4_trigger_free(mgbdev->indio_dev);
> +
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
> +		if (mgbdev->vout[i])
> +			mgb4_vout_free(mgbdev->vout[i]);
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++)
> +		if (mgbdev->vin[i])
> +			mgb4_vin_free(mgbdev->vin[i]);
> +
> +	free_sysfs(mgbdev->pdev);
> +	free_spi(mgbdev);
> +	free_i2c(mgbdev);
> +	mgb4_regs_free(&mgbdev->video);
> +	mgb4_regs_free(&mgbdev->cmt);
> +
> +	mgb4_dma_channel_free(mgbdev);
> +	free_xdma(mgbdev);
> +
> +	pci_disable_msix(mgbdev->pdev);
> +	pci_disable_device(mgbdev->pdev);
> +
> +	kfree(mgbdev);
> +}
> +
> +static const struct pci_device_id mgb4_pci_ids[] = {
> +	{ PCI_DEVICE(0x1ed8, 0x0101), },
> +	{ 0, }
> +};
> +MODULE_DEVICE_TABLE(pci, mgb4_pci_ids);
> +
> +static struct pci_driver mgb4_pci_driver = {
> +	.name = KBUILD_MODNAME,
> +	.id_table = mgb4_pci_ids,
> +	.probe = mgb4_probe,
> +	.remove = mgb4_remove,
> +};
> +
> +module_pci_driver(mgb4_pci_driver);
> +
> +MODULE_AUTHOR("Digiteq Automotive s.r.o.");
> +MODULE_DESCRIPTION("Digiteq Automotive MGB4 Driver");
> +MODULE_LICENSE("GPL");
> +MODULE_SOFTDEP("pre: platform:xiic-i2c platform:xilinx_spi spi-nor");
> diff --git a/drivers/media/pci/mgb4/mgb4_core.h b/drivers/media/pci/mgb4/mgb4_core.h
> new file mode 100644
> index 000000000000..65445c41ad56
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_core.h
> @@ -0,0 +1,72 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_CORE_H__
> +#define __MGB4_CORE_H__
> +
> +#include <linux/spi/flash.h>
> +#include <linux/mtd/partitions.h>
> +#include <linux/mutex.h>
> +#include <linux/dmaengine.h>
> +#include "mgb4_regs.h"
> +
> +#define MGB4_VIN_DEVICES  2
> +#define MGB4_VOUT_DEVICES 2
> +
> +#define MGB4_MGB4_BAR_ID  0
> +#define MGB4_XDMA_BAR_ID  1
> +
> +#define MGB4_IS_GMSL(mgbdev) \
> +	((mgbdev)->module_version >> 4 == 2)
> +#define MGB4_IS_FPDL3(mgbdev) \
> +	((mgbdev)->module_version >> 4 == 1)
> +
> +struct mgb4_dma_channel {
> +	struct dma_chan *chan;
> +	struct completion req_compl;
> +};
> +
> +struct mgb4_dev {
> +	struct pci_dev *pdev;
> +	struct platform_device *xdev;
> +	struct mgb4_vin_dev *vin[MGB4_VIN_DEVICES];
> +	struct mgb4_vout_dev *vout[MGB4_VOUT_DEVICES];
> +
> +	struct mgb4_dma_channel c2h_chan[MGB4_VIN_DEVICES];
> +	struct mgb4_dma_channel h2c_chan[MGB4_VOUT_DEVICES];
> +	struct dma_slave_map slave_map[MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES];
> +
> +	struct mgb4_regs video;
> +	struct mgb4_regs cmt;
> +
> +	struct clk_hw *i2c_clk;
> +	struct clk_lookup *i2c_cl;
> +	struct platform_device *i2c_pdev;
> +	struct i2c_adapter *i2c_adap;
> +	struct mutex i2c_lock; /* I2C bus access lock */
> +
> +	struct platform_device *spi_pdev;
> +	struct flash_platform_data flash_data;
> +	struct mtd_partition partitions[2];
> +	char flash_name[16];
> +	char fw_part_name[16];
> +	char data_part_name[16];
> +	char channel_names[MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES][16];
> +
> +	struct iio_dev *indio_dev;
> +#if IS_REACHABLE(CONFIG_HWMON)
> +	struct device *hwmon_dev;
> +#endif
> +
> +	u8 module_version;
> +	u32 serial_number;
> +
> +#ifdef CONFIG_DEBUG_FS
> +	struct dentry *debugfs;
> +#endif
> +};
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_dma.c b/drivers/media/pci/mgb4/mgb4_dma.c
> new file mode 100644
> index 000000000000..cae888e6504b
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_dma.c
> @@ -0,0 +1,123 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This module handles the DMA transfers. A standard dmaengine API as provided
> + * by the XDMA module is used.
> + */
> +
> +#include <linux/pci.h>
> +#include <linux/dma-direction.h>
> +#include "mgb4_core.h"
> +#include "mgb4_dma.h"
> +
> +static void chan_irq(void *param)
> +{
> +	struct mgb4_dma_channel *chan = param;
> +
> +	complete(&chan->req_compl);
> +}
> +
> +int mgb4_dma_transfer(struct mgb4_dev *mgbdev, u32 channel, bool write,
> +		      u64 paddr, struct sg_table *sgt)
> +{
> +	struct dma_slave_config cfg;
> +	struct mgb4_dma_channel *chan;
> +	struct dma_async_tx_descriptor *tx;
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	int ret;
> +
> +	memset(&cfg, 0, sizeof(cfg));
> +
> +	if (write) {
> +		cfg.direction = DMA_MEM_TO_DEV;
> +		cfg.dst_addr = paddr;
> +		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> +		chan = &mgbdev->h2c_chan[channel];
> +	} else {
> +		cfg.direction = DMA_DEV_TO_MEM;
> +		cfg.src_addr = paddr;
> +		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> +		chan = &mgbdev->c2h_chan[channel];
> +	}
> +
> +	ret = dmaengine_slave_config(chan->chan, &cfg);
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to config dma: %d\n", ret);
> +		return ret;
> +	}
> +
> +	tx = dmaengine_prep_slave_sg(chan->chan, sgt->sgl, sgt->nents,
> +				     cfg.direction, 0);
> +	if (!tx) {
> +		dev_err(&pdev->dev, "failed to prep slave sg\n");
> +		return -EIO;
> +	}
> +
> +	tx->callback = chan_irq;
> +	tx->callback_param = chan;
> +
> +	ret = dma_submit_error(dmaengine_submit(tx));
> +	if (ret) {
> +		dev_err(&pdev->dev, "failed to submit sg\n");
> +		return -EIO;
> +	}
> +
> +	dma_async_issue_pending(chan->chan);
> +
> +	if (!wait_for_completion_timeout(&chan->req_compl,
> +					 msecs_to_jiffies(10000))) {
> +		dev_err(&pdev->dev, "dma timeout\n");
> +		dmaengine_terminate_sync(chan->chan);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +int mgb4_dma_channel_init(struct mgb4_dev *mgbdev)
> +{
> +	int i, ret;
> +	char name[16];
> +	struct pci_dev *pdev = mgbdev->pdev;
> +
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
> +		sprintf(name, "c2h%d", i);
> +		mgbdev->c2h_chan[i].chan = dma_request_chan(&pdev->dev, name);
> +		if (IS_ERR(mgbdev->c2h_chan[i].chan)) {
> +			dev_err(&pdev->dev, "failed to initialize %s", name);
> +			ret = PTR_ERR(mgbdev->c2h_chan[i].chan);
> +			mgbdev->c2h_chan[i].chan = NULL;
> +			return ret;
> +		}
> +		init_completion(&mgbdev->c2h_chan[i].req_compl);
> +	}
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
> +		sprintf(name, "h2c%d", i);
> +		mgbdev->h2c_chan[i].chan = dma_request_chan(&pdev->dev, name);
> +		if (IS_ERR(mgbdev->h2c_chan[i].chan)) {
> +			dev_err(&pdev->dev, "failed to initialize %s", name);
> +			ret = PTR_ERR(mgbdev->h2c_chan[i].chan);
> +			mgbdev->h2c_chan[i].chan = NULL;
> +			return ret;
> +		}
> +		init_completion(&mgbdev->h2c_chan[i].req_compl);
> +	}
> +
> +	return 0;
> +}
> +
> +void mgb4_dma_channel_free(struct mgb4_dev *mgbdev)
> +{
> +	int i;
> +
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
> +		if (mgbdev->c2h_chan[i].chan)
> +			dma_release_channel(mgbdev->c2h_chan[i].chan);
> +	}
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
> +		if (mgbdev->h2c_chan[i].chan)
> +			dma_release_channel(mgbdev->h2c_chan[i].chan);
> +	}
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_dma.h b/drivers/media/pci/mgb4/mgb4_dma.h
> new file mode 100644
> index 000000000000..4ebc2b1ce9b7
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_dma.h
> @@ -0,0 +1,18 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_DMA_H__
> +#define __MGB4_DMA_H__
> +
> +#include "mgb4_core.h"
> +
> +int mgb4_dma_channel_init(struct mgb4_dev *mgbdev);
> +void mgb4_dma_channel_free(struct mgb4_dev *mgbdev);
> +
> +int mgb4_dma_transfer(struct mgb4_dev *mgbdev, u32 channel, bool write,
> +		      u64 paddr, struct sg_table *sgt);
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_i2c.c b/drivers/media/pci/mgb4/mgb4_i2c.c
> new file mode 100644
> index 000000000000..2697b67e290e
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_i2c.c
> @@ -0,0 +1,140 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * The i2c module unifies the I2C access to the serializes/deserializes. The I2C
> + * chips on the GMSL module use 16b addressing, the FPDL3 chips use standard
> + * 8b addressing.
> + */
> +
> +#include "mgb4_i2c.h"
> +
> +static int read_r16(struct i2c_client *client, u16 reg, u8 *val, int len)
> +{
> +	int ret;
> +	u8 buf[2];
> +	struct i2c_msg msg[2] = {
> +		{
> +			.addr = client->addr,
> +			.flags = 0,
> +			.len = 2,
> +			.buf = buf,
> +		}, {
> +			.addr = client->addr,
> +			.flags = I2C_M_RD,
> +			.len = len,
> +			.buf = val,
> +		}
> +	};
> +
> +	buf[0] = (reg >> 8) & 0xff;
> +	buf[1] = (reg >> 0) & 0xff;
> +
> +	ret = i2c_transfer(client->adapter, msg, 2);
> +	if (ret < 0)
> +		return ret;
> +	else if (ret != 2)
> +		return -EREMOTEIO;
> +	else
> +		return 0;
> +}
> +
> +static int write_r16(struct i2c_client *client, u16 reg, const u8 *val, int len)
> +{
> +	int ret;
> +	u8 buf[4];
> +	struct i2c_msg msg[1] = {
> +		{
> +			.addr = client->addr,
> +			.flags = 0,
> +			.len = 2 + len,
> +			.buf = buf,
> +		}
> +	};
> +
> +	if (2 + len > sizeof(buf))
> +		return -EINVAL;
> +
> +	buf[0] = (reg >> 8) & 0xff;
> +	buf[1] = (reg >> 0) & 0xff;
> +	memcpy(&buf[2], val, len);
> +
> +	ret = i2c_transfer(client->adapter, msg, 1);
> +	if (ret < 0)
> +		return ret;
> +	else if (ret != 1)
> +		return -EREMOTEIO;
> +	else
> +		return 0;
> +}
> +
> +int mgb4_i2c_init(struct mgb4_i2c_client *client, struct i2c_adapter *adap,
> +		  struct i2c_board_info const *info, int addr_size)
> +{
> +	client->client = i2c_new_client_device(adap, info);
> +	if (IS_ERR(client->client))
> +		return PTR_ERR(client->client);
> +
> +	client->addr_size = addr_size;
> +
> +	return 0;
> +}
> +
> +void mgb4_i2c_free(struct mgb4_i2c_client *client)
> +{
> +	i2c_unregister_device(client->client);
> +}
> +
> +s32 mgb4_i2c_read_byte(struct mgb4_i2c_client *client, u16 reg)
> +{
> +	int ret;
> +	u8 b;
> +
> +	if (client->addr_size == 8)
> +		return i2c_smbus_read_byte_data(client->client, reg);
> +
> +	ret = read_r16(client->client, reg, &b, 1);
> +	if (ret < 0)
> +		return ret;
> +
> +	return (s32)b;
> +}
> +
> +s32 mgb4_i2c_write_byte(struct mgb4_i2c_client *client, u16 reg, u8 val)
> +{
> +	if (client->addr_size == 8)
> +		return i2c_smbus_write_byte_data(client->client, reg, val);
> +	else
> +		return write_r16(client->client, reg, &val, 1);
> +}
> +
> +s32 mgb4_i2c_mask_byte(struct mgb4_i2c_client *client, u16 reg, u8 mask, u8 val)
> +{
> +	s32 ret;
> +
> +	if (mask != 0xFF) {
> +		ret = mgb4_i2c_read_byte(client, reg);
> +		if (ret < 0)
> +			return ret;
> +		val |= (u8)ret & ~mask;
> +	}
> +
> +	return mgb4_i2c_write_byte(client, reg, val);
> +}
> +
> +int mgb4_i2c_configure(struct mgb4_i2c_client *client,
> +		       const struct mgb4_i2c_kv *values, size_t count)
> +{
> +	size_t i;
> +	s32 res;
> +
> +	for (i = 0; i < count; i++) {
> +		res = mgb4_i2c_mask_byte(client, values[i].reg, values[i].mask,
> +					 values[i].val);
> +		if (res < 0)
> +			return res;
> +	}
> +
> +	return 0;
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_i2c.h b/drivers/media/pci/mgb4/mgb4_i2c.h
> new file mode 100644
> index 000000000000..fac6a1634474
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_i2c.h
> @@ -0,0 +1,35 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_I2C_H__
> +#define __MGB4_I2C_H__
> +
> +#include <linux/i2c.h>
> +
> +struct mgb4_i2c_client {
> +	struct i2c_client *client;
> +	int addr_size;
> +};
> +
> +struct mgb4_i2c_kv {
> +	u16 reg;
> +	u8 mask;
> +	u8 val;
> +};
> +
> +int mgb4_i2c_init(struct mgb4_i2c_client *client, struct i2c_adapter *adap,
> +		  struct i2c_board_info const *info, int addr_size);
> +void mgb4_i2c_free(struct mgb4_i2c_client *client);
> +
> +s32 mgb4_i2c_read_byte(struct mgb4_i2c_client *client, u16 reg);
> +s32 mgb4_i2c_write_byte(struct mgb4_i2c_client *client, u16 reg, u8 val);
> +s32 mgb4_i2c_mask_byte(struct mgb4_i2c_client *client, u16 reg, u8 mask,
> +		       u8 val);
> +
> +int mgb4_i2c_configure(struct mgb4_i2c_client *client,
> +		       const struct mgb4_i2c_kv *values, size_t count);
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_io.h b/drivers/media/pci/mgb4/mgb4_io.h
> new file mode 100644
> index 000000000000..8698db1be4a9
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_io.h
> @@ -0,0 +1,33 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_IO_H__
> +#define __MGB4_IO_H__
> +
> +#include <media/v4l2-dev.h>
> +
> +#define MGB4_DEFAULT_WIDTH     1280
> +#define MGB4_DEFAULT_HEIGHT    640
> +#define MGB4_DEFAULT_PERIOD    (125000000 / 60)
> +
> +/* Register access error indication */
> +#define MGB4_ERR_NO_REG        0xFFFFFFFE
> +/* Frame buffer addresses greater than 0xFFFFFFFA indicate HW errors */
> +#define MGB4_ERR_QUEUE_TIMEOUT 0xFFFFFFFD
> +#define MGB4_ERR_QUEUE_EMPTY   0xFFFFFFFC
> +#define MGB4_ERR_QUEUE_FULL    0xFFFFFFFB
> +
> +struct mgb4_frame_buffer {
> +	struct vb2_v4l2_buffer vb;
> +	struct list_head list;
> +};
> +
> +static inline struct mgb4_frame_buffer *to_frame_buffer(struct vb2_v4l2_buffer *vbuf)
> +{
> +	return container_of(vbuf, struct mgb4_frame_buffer, vb);
> +}
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_regs.c b/drivers/media/pci/mgb4/mgb4_regs.c
> new file mode 100644
> index 000000000000..53d4e4503a74
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_regs.c
> @@ -0,0 +1,30 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#include <linux/ioport.h>
> +#include "mgb4_regs.h"
> +
> +int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)
> +{
> +	regs->mapbase = res->start;
> +	regs->mapsize = res->end - res->start;
> +
> +	if (!request_mem_region(regs->mapbase, regs->mapsize, res->name))
> +		return -EINVAL;
> +	regs->membase = ioremap(regs->mapbase, regs->mapsize);
> +	if (!regs->membase) {
> +		release_mem_region(regs->mapbase, regs->mapsize);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +void mgb4_regs_free(struct mgb4_regs *regs)
> +{
> +	iounmap(regs->membase);
> +	release_mem_region(regs->mapbase, regs->mapsize);
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_regs.h b/drivers/media/pci/mgb4/mgb4_regs.h
> new file mode 100644
> index 000000000000..c45180890730
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_regs.h
> @@ -0,0 +1,35 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_REGS_H__
> +#define __MGB4_REGS_H__
> +
> +#include <linux/io.h>
> +
> +struct mgb4_regs {
> +	resource_size_t mapbase;
> +	resource_size_t mapsize;
> +	void __iomem *membase;
> +};
> +
> +#define mgb4_write_reg(regs, offset, val) \
> +	iowrite32(val, (regs)->membase + (offset))
> +#define  mgb4_read_reg(regs, offset) \
> +	ioread32((regs)->membase + (offset))
> +
> +static inline void mgb4_mask_reg(struct mgb4_regs *regs, u32 reg, u32 mask,
> +				 u32 val)
> +{
> +	u32 ret = mgb4_read_reg(regs, reg);
> +
> +	val |= ret & ~mask;
> +	mgb4_write_reg(regs, reg, val);
> +}
> +
> +int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs);
> +void mgb4_regs_free(struct mgb4_regs *regs);
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_sysfs.h b/drivers/media/pci/mgb4/mgb4_sysfs.h
> new file mode 100644
> index 000000000000..2b42a8ba37f7
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_sysfs.h
> @@ -0,0 +1,18 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_SYSFS_H__
> +#define __MGB4_SYSFS_H__
> +
> +#include <linux/sysfs.h>
> +
> +extern struct device_attribute *mgb4_pci_attrs[];
> +extern struct device_attribute *mgb4_fpdl3_in_attrs[];
> +extern struct device_attribute *mgb4_gmsl_in_attrs[];
> +extern struct device_attribute *mgb4_fpdl3_out_attrs[];
> +extern struct device_attribute *mgb4_gmsl_out_attrs[];
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_in.c b/drivers/media/pci/mgb4/mgb4_sysfs_in.c
> new file mode 100644
> index 000000000000..4fe29158521b
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_sysfs_in.c
> @@ -0,0 +1,757 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This module handles all the sysfs info/configuration that is related to the
> + * v4l2 input devices.
> + */
> +
> +#include <linux/device.h>
> +#include "mgb4_core.h"
> +#include "mgb4_i2c.h"
> +#include "mgb4_vin.h"
> +#include "mgb4_cmt.h"
> +#include "mgb4_sysfs.h"
> +
> +/* Common for both FPDL3 and GMSL */
> +
> +static ssize_t read_input_id(struct device *dev,
> +			     struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +
> +	return sprintf(buf, "%d\n", vindev->config->id);
> +}
> +
> +static ssize_t read_oldi_lane_width(struct device *dev,
> +				    struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	struct mgb4_dev *mgbdev = vindev->mgbdev;
> +	u16 i2c_reg;
> +	u8 i2c_mask, i2c_single_val, i2c_dual_val;
> +	u32 config;
> +	int ret;
> +
> +	i2c_reg = MGB4_IS_GMSL(mgbdev) ? 0x1CE : 0x49;
> +	i2c_mask = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x03;
> +	i2c_single_val = MGB4_IS_GMSL(mgbdev) ? 0x00 : 0x02;
> +	i2c_dual_val = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x00;
> +
> +	mutex_lock(&mgbdev->i2c_lock);
> +	ret = mgb4_i2c_read_byte(&vindev->deser, i2c_reg);
> +	mutex_unlock(&mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	config = mgb4_read_reg(&mgbdev->video, vindev->config->regs.config);
> +
> +	if (((config & (1U << 9)) && ((ret & i2c_mask) != i2c_dual_val)) ||
> +	    (!(config & (1U << 9)) && ((ret & i2c_mask) != i2c_single_val))) {
> +		dev_err(dev, "I2C/FPGA register value mismatch\n");
> +		return -EINVAL;
> +	}
> +
> +	return sprintf(buf, "%s\n", config & (1U << 9) ? "1" : "0");
> +}
> +
> +static ssize_t write_oldi_lane_width(struct device *dev,
> +				     struct device_attribute *attr,
> +				     const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	struct mgb4_dev *mgbdev = vindev->mgbdev;
> +	u32 fpga_data;
> +	u16 i2c_reg;
> +	u8 i2c_mask, i2c_data;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* single */
> +		fpga_data = 0;
> +		i2c_data = MGB4_IS_GMSL(mgbdev) ? 0x00 : 0x02;
> +		break;
> +	case 1: /* dual */
> +		fpga_data = 1U << 9;
> +		i2c_data = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x00;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	i2c_reg = MGB4_IS_GMSL(mgbdev) ? 0x1CE : 0x49;
> +	i2c_mask = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x03;
> +
> +	mutex_lock(&mgbdev->i2c_lock);
> +	ret = mgb4_i2c_mask_byte(&vindev->deser, i2c_reg, i2c_mask, i2c_data);
> +	mutex_unlock(&mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +	mgb4_mask_reg(&mgbdev->video, vindev->config->regs.config, 1U << 9,
> +		      fpga_data);
> +	if (MGB4_IS_GMSL(mgbdev)) {
> +		/* reset input link */
> +		mutex_lock(&mgbdev->i2c_lock);
> +		ret = mgb4_i2c_mask_byte(&vindev->deser, 0x10, 1U << 5, 1U << 5);
> +		mutex_unlock(&mgbdev->i2c_lock);
> +		if (ret < 0)
> +			return -EIO;
> +	}
> +
> +	return count;
> +}
> +
> +static ssize_t read_color_mapping(struct device *dev,
> +				  struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
> +	  vindev->config->regs.config);
> +
> +	return sprintf(buf, "%s\n", config & (1U << 8) ? "0" : "1");
> +}
> +
> +static ssize_t write_color_mapping(struct device *dev,
> +				   struct device_attribute *attr,
> +				   const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 fpga_data;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* OLDI/JEIDA */
> +		fpga_data = (1U << 8);
> +		break;
> +	case 1: /* SPWG/VESA */
> +		fpga_data = 0;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.config,
> +		      1U << 8, fpga_data);
> +
> +	return count;
> +}
> +
> +static ssize_t read_link_status(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
> +				   vindev->config->regs.status);
> +
> +	return sprintf(buf, "%s\n", status & (1U << 2) ? "1" : "0");
> +}
> +
> +static ssize_t read_stream_status(struct device *dev,
> +				  struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
> +				   vindev->config->regs.status);
> +
> +	return sprintf(buf, "%s\n", ((status & (1 << 14)) &&
> +		       (status & (1 << 2)) && (status & (3 << 9))) ? "1" : "0");
> +}
> +
> +static ssize_t read_video_width(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
> +	  vindev->config->regs.resolution);
> +
> +	return sprintf(buf, "%u\n", config >> 16);
> +}
> +
> +static ssize_t read_video_height(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
> +	  vindev->config->regs.resolution);
> +
> +	return sprintf(buf, "%u\n", config & 0xFFFF);
> +}
> +
> +static ssize_t read_hsync_status(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
> +				   vindev->config->regs.status);
> +	u32 res;
> +
> +	if (!(status & (1U << 11)))
> +		res = 0x02; // not available
> +	else if (status & (1U << 12))
> +		res = 0x01; // active high
> +	else
> +		res = 0x00; // active low
> +
> +	return sprintf(buf, "%u\n", res);
> +}
> +
> +static ssize_t read_vsync_status(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
> +				   vindev->config->regs.status);
> +	u32 res;
> +
> +	if (!(status & (1U << 11)))
> +		res = 0x02; // not available
> +	else if (status & (1U << 13))
> +		res = 0x01; // active high
> +	else
> +		res = 0x00; // active low
> +
> +	return sprintf(buf, "%u\n", res);
> +}
> +
> +static ssize_t read_hsync_gap(struct device *dev, struct device_attribute *attr,
> +			      char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sync = mgb4_read_reg(&vindev->mgbdev->video,
> +				 vindev->config->regs.sync);
> +
> +	return sprintf(buf, "%u\n", sync >> 16);
> +}
> +
> +static ssize_t write_hsync_gap(struct device *dev,
> +			       struct device_attribute *attr, const char *buf,
> +			       size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFFFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.sync,
> +		      0xFFFF0000, val << 16);
> +
> +	return count;
> +}
> +
> +static ssize_t read_vsync_gap(struct device *dev, struct device_attribute *attr,
> +			      char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sync = mgb4_read_reg(&vindev->mgbdev->video,
> +				 vindev->config->regs.sync);
> +
> +	return sprintf(buf, "%u\n", sync & 0xFFFF);
> +}
> +
> +static ssize_t write_vsync_gap(struct device *dev,
> +			       struct device_attribute *attr, const char *buf,
> +			       size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFFFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.sync, 0xFFFF,
> +		      val);
> +
> +	return count;
> +}
> +
> +static ssize_t read_pclk_frequency(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 freq = mgb4_read_reg(&vindev->mgbdev->video,
> +				 vindev->config->regs.pclk);
> +
> +	return sprintf(buf, "%u\n", freq);
> +}
> +
> +static ssize_t read_hsync_width(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
> +}
> +
> +static ssize_t read_vsync_width(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal2);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
> +}
> +
> +static ssize_t read_hback_porch(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
> +}
> +
> +static ssize_t read_hfront_porch(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x000000FF));
> +}
> +
> +static ssize_t read_vback_porch(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal2);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
> +}
> +
> +static ssize_t read_vfront_porch(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
> +				vindev->config->regs.signal2);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x000000FF));
> +}
> +
> +static ssize_t read_frequency_range(struct device *dev,
> +				    struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +
> +	return sprintf(buf, "%d\n", vindev->freq_range);
> +}
> +
> +static ssize_t write_frequency_range(struct device *dev,
> +				     struct device_attribute *attr,
> +				     const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	unsigned long val, flags;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 1)
> +		return -EINVAL;
> +
> +	spin_lock_irqsave(&vindev->vdev.fh_lock, flags);
> +	if (!list_empty(&vindev->vdev.fh_list)) {
> +		spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
> +		return -EBUSY;
> +	}
> +
> +	mgb4_cmt_set_vin_freq_range(vindev, val);
> +	vindev->freq_range = val;
> +
> +	spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
> +
> +	return count;
> +}
> +
> +/* FPDL3 only */
> +
> +static ssize_t read_fpdl3_input_width(struct device *dev,
> +				      struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	s32 ret;
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_read_byte(&vindev->deser, 0x34);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	switch ((u8)ret & 0x18) {
> +	case 0:
> +		return sprintf(buf, "0\n");
> +	case 0x10:
> +		return sprintf(buf, "1\n");
> +	case 0x08:
> +		return sprintf(buf, "2\n");
> +	default:
> +		return -EINVAL;
> +	}
> +}
> +
> +static ssize_t write_fpdl3_input_width(struct device *dev,
> +				       struct device_attribute *attr,
> +				       const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	u8 i2c_data;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* auto */
> +		i2c_data = 0x00;
> +		break;
> +	case 1: /* single */
> +		i2c_data = 0x10;
> +		break;
> +	case 2: /* dual */
> +		i2c_data = 0x08;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_mask_byte(&vindev->deser, 0x34, 0x18, i2c_data);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +/* GMSL only */
> +
> +static ssize_t read_gmsl_mode(struct device *dev,
> +			      struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	s32 r1, r300, r3;
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	r1 = mgb4_i2c_read_byte(&vindev->deser, 0x01);
> +	r300 = mgb4_i2c_read_byte(&vindev->deser, 0x300);
> +	r3 = mgb4_i2c_read_byte(&vindev->deser, 0x03);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (r1 < 0 || r300 < 0 || r3 < 0)
> +		return -EIO;
> +
> +	if ((r1 & 0x03) == 0x03 && (r300 & 0x0C) == 0x0C && (r3 & 0xC0) == 0xC0)
> +		return sprintf(buf, "0\n");
> +	else if ((r1 & 0x03) == 0x02 && (r300 & 0x0C) == 0x08 && (r3 & 0xC0) == 0x00)
> +		return sprintf(buf, "1\n");
> +	else if ((r1 & 0x03) == 0x01 && (r300 & 0x0C) == 0x04 && (r3 & 0xC0) == 0x00)
> +		return sprintf(buf, "2\n");
> +	else if ((r1 & 0x03) == 0x00 && (r300 & 0x0C) == 0x00 && (r3 & 0xC0) == 0x00)
> +		return sprintf(buf, "3\n");
> +	else
> +		return -EINVAL;
> +}
> +
> +static ssize_t write_gmsl_mode(struct device *dev,
> +			       struct device_attribute *attr, const char *buf,
> +			       size_t count)
> +{
> +	static const struct mgb4_i2c_kv G12[] = {
> +		{0x01, 0x03, 0x03}, {0x300, 0x0C, 0x0C}, {0x03, 0xC0, 0xC0}};
> +	static const struct mgb4_i2c_kv G6[] = {
> +		{0x01, 0x03, 0x02}, {0x300, 0x0C, 0x08}, {0x03, 0xC0, 0x00}};
> +	static const struct mgb4_i2c_kv G3[] = {
> +		{0x01, 0x03, 0x01}, {0x300, 0x0C, 0x04}, {0x03, 0xC0, 0x00}};
> +	static const struct mgb4_i2c_kv G1[] = {
> +		{0x01, 0x03, 0x00}, {0x300, 0x0C, 0x00}, {0x03, 0xC0, 0x00}};
> +	static const struct mgb4_i2c_kv reset[] = {
> +		{0x10, 1U << 5, 1U << 5}, {0x300, 1U << 6, 1U << 6}};
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	const struct mgb4_i2c_kv *values;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* 12Gb/s */
> +		values = G12;
> +		break;
> +	case 1: /* 6Gb/s */
> +		values = G6;
> +		break;
> +	case 2: /* 3Gb/s */
> +		values = G3;
> +		break;
> +	case 3: /* 1.5Gb/s */
> +		values = G1;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_configure(&vindev->deser, values, 3);
> +	ret |= mgb4_i2c_configure(&vindev->deser, reset, 2);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +static ssize_t read_gmsl_stream_id(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	s32 ret;
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_read_byte(&vindev->deser, 0xA0);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return sprintf(buf, "%d\n", ret & 0x03);
> +}
> +
> +static ssize_t write_gmsl_stream_id(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	unsigned long val, flags;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 3)
> +		return -EINVAL;
> +
> +	spin_lock_irqsave(&vindev->vdev.fh_lock, flags);
> +	ret = list_empty(&vindev->vdev.fh_list);
> +	spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
> +	if (!ret)
> +		return -EBUSY;
> +
> +	/* Formaly, there is a race condition here as the change should also be
> +	 * done under the spinlock above, but we only want to prevent
> +	 * a resolution change while the device is in use. However, resolution
> +	 * changes can happen anyway and the driver can handle them (they only
> +	 * break the image, not the system).
> +	 *
> +	 * So instead of trying to workaround the spinlock - mgb4_i2c_mask_byte()
> +	 * does sleep - we simply let the rare race condition happen...
> +	 */
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_mask_byte(&vindev->deser, 0xA0, 0x03, (u8)val);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +static ssize_t read_gmsl_fec(struct device *dev, struct device_attribute *attr,
> +			     char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	s32 r3e0, r308;
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	r3e0 = mgb4_i2c_read_byte(&vindev->deser, 0x3E0);
> +	r308 = mgb4_i2c_read_byte(&vindev->deser, 0x308);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (r3e0 < 0 || r308 < 0)
> +		return -EIO;
> +
> +	if ((r3e0 & 0x07) == 0x00 && (r308 & 0x01) == 0x00)
> +		return sprintf(buf, "0\n");
> +	else if ((r3e0 & 0x07) == 0x07 && (r308 & 0x01) == 0x01)
> +		return sprintf(buf, "1\n");
> +	else
> +		return -EINVAL;
> +}
> +
> +static ssize_t write_gmsl_fec(struct device *dev, struct device_attribute *attr,
> +			      const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
> +	static const struct mgb4_i2c_kv enable[] = {
> +		{0x3E0, 0x07, 0x07}, {0x308, 0x01, 0x01}};
> +	static const struct mgb4_i2c_kv disable[] = {
> +		{0x3E0, 0x07, 0x00}, {0x308, 0x01, 0x00}};
> +	static const struct mgb4_i2c_kv reset[] = {
> +		{0x10, 1U << 5, 1U << 5}, {0x300, 1U << 6, 1U << 6}};
> +	const struct mgb4_i2c_kv *values;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* disabled */
> +		values = disable;
> +		break;
> +	case 1: /* enabled */
> +		values = enable;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	mutex_lock(&vindev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_configure(&vindev->deser, values, 2);
> +	ret |= mgb4_i2c_configure(&vindev->deser, reset, 2);
> +	mutex_unlock(&vindev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +static DEVICE_ATTR(input_id, 0444, read_input_id, NULL);
> +static DEVICE_ATTR(oldi_lane_width, 0644, read_oldi_lane_width,
> +		   write_oldi_lane_width);
> +static DEVICE_ATTR(color_mapping, 0644, read_color_mapping,
> +		   write_color_mapping);
> +static DEVICE_ATTR(link_status, 0444, read_link_status, NULL);
> +static DEVICE_ATTR(stream_status, 0444, read_stream_status, NULL);
> +static DEVICE_ATTR(video_width, 0444, read_video_width, NULL);
> +static DEVICE_ATTR(video_height, 0444, read_video_height, NULL);
> +static DEVICE_ATTR(hsync_status, 0444, read_hsync_status, NULL);
> +static DEVICE_ATTR(vsync_status, 0444, read_vsync_status, NULL);
> +static DEVICE_ATTR(hsync_gap_length, 0644, read_hsync_gap, write_hsync_gap);
> +static DEVICE_ATTR(vsync_gap_length, 0644, read_vsync_gap, write_vsync_gap);
> +static DEVICE_ATTR(pclk_frequency, 0444, read_pclk_frequency, NULL);
> +static DEVICE_ATTR(hsync_width, 0444, read_hsync_width, NULL);
> +static DEVICE_ATTR(vsync_width, 0444, read_vsync_width, NULL);
> +static DEVICE_ATTR(hback_porch, 0444, read_hback_porch, NULL);
> +static DEVICE_ATTR(hfront_porch, 0444, read_hfront_porch, NULL);
> +static DEVICE_ATTR(vback_porch, 0444, read_vback_porch, NULL);
> +static DEVICE_ATTR(vfront_porch, 0444, read_vfront_porch, NULL);
> +static DEVICE_ATTR(frequency_range, 0644, read_frequency_range,
> +		   write_frequency_range);
> +
> +static DEVICE_ATTR(fpdl3_input_width, 0644, read_fpdl3_input_width,
> +		   write_fpdl3_input_width);
> +
> +static DEVICE_ATTR(gmsl_mode, 0644, read_gmsl_mode, write_gmsl_mode);
> +static DEVICE_ATTR(gmsl_stream_id, 0644, read_gmsl_stream_id,
> +		   write_gmsl_stream_id);
> +static DEVICE_ATTR(gmsl_fec, 0644, read_gmsl_fec, write_gmsl_fec);

Use DEVICE_ATTR_RO/RW instead. This also ties into the checkpatch warnings
regarding the naming.

> +
> +struct device_attribute *mgb4_fpdl3_in_attrs[] = {
> +	&dev_attr_input_id,
> +	&dev_attr_link_status,
> +	&dev_attr_stream_status,
> +	&dev_attr_video_width,
> +	&dev_attr_video_height,
> +	&dev_attr_hsync_status,
> +	&dev_attr_vsync_status,
> +	&dev_attr_oldi_lane_width,
> +	&dev_attr_color_mapping,
> +	&dev_attr_hsync_gap_length,
> +	&dev_attr_vsync_gap_length,
> +	&dev_attr_pclk_frequency,
> +	&dev_attr_hsync_width,
> +	&dev_attr_vsync_width,
> +	&dev_attr_hback_porch,
> +	&dev_attr_hfront_porch,
> +	&dev_attr_vback_porch,
> +	&dev_attr_vfront_porch,
> +	&dev_attr_frequency_range,
> +	&dev_attr_fpdl3_input_width,
> +	NULL
> +};
> +
> +struct device_attribute *mgb4_gmsl_in_attrs[] = {
> +	&dev_attr_input_id,
> +	&dev_attr_link_status,
> +	&dev_attr_stream_status,
> +	&dev_attr_video_width,
> +	&dev_attr_video_height,
> +	&dev_attr_hsync_status,
> +	&dev_attr_vsync_status,
> +	&dev_attr_oldi_lane_width,
> +	&dev_attr_color_mapping,
> +	&dev_attr_hsync_gap_length,
> +	&dev_attr_vsync_gap_length,
> +	&dev_attr_pclk_frequency,
> +	&dev_attr_hsync_width,
> +	&dev_attr_vsync_width,
> +	&dev_attr_hback_porch,
> +	&dev_attr_hfront_porch,
> +	&dev_attr_vback_porch,
> +	&dev_attr_vfront_porch,
> +	&dev_attr_frequency_range,
> +	&dev_attr_gmsl_mode,
> +	&dev_attr_gmsl_stream_id,
> +	&dev_attr_gmsl_fec,
> +	NULL
> +};
> diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_out.c b/drivers/media/pci/mgb4/mgb4_sysfs_out.c
> new file mode 100644
> index 000000000000..243a654f75ad
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_sysfs_out.c
> @@ -0,0 +1,700 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This module handles all the sysfs info/configuration that is related to the
> + * v4l2 output devices.
> + */
> +
> +#include <linux/device.h>
> +#include "mgb4_core.h"
> +#include "mgb4_i2c.h"
> +#include "mgb4_vout.h"
> +#include "mgb4_vin.h"
> +#include "mgb4_cmt.h"
> +#include "mgb4_sysfs.h"
> +
> +static int loopin_cnt(struct mgb4_vin_dev *vindev)
> +{
> +	struct mgb4_vout_dev *voutdev;
> +	u32 config;
> +	int i, cnt = 0;
> +
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
> +		voutdev = vindev->mgbdev->vout[i];
> +		if (!voutdev)
> +			continue;
> +
> +		config = mgb4_read_reg(&voutdev->mgbdev->video,
> +				       voutdev->config->regs.config);
> +		if ((config & 0xc) >> 2 == vindev->config->id)
> +			cnt++;
> +	}
> +
> +	return cnt;
> +}
> +
> +/* Common for both FPDL3 and GMSL */
> +
> +static ssize_t read_output_id(struct device *dev,
> +			      struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +
> +	return sprintf(buf, "%d\n", voutdev->config->id);
> +}
> +
> +static ssize_t read_video_source(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.config);
> +
> +	return sprintf(buf, "%u\n", (config & 0xc) >> 2);
> +}
> +
> +static ssize_t write_video_source(struct device *dev,
> +				  struct device_attribute *attr,
> +				  const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	struct mgb4_dev *mgbdev = voutdev->mgbdev;
> +	struct mgb4_vin_dev *loopin_new = 0, *loopin_old = 0;
> +	unsigned long val;
> +	unsigned long flags_in[MGB4_VIN_DEVICES], flags_out[MGB4_VOUT_DEVICES];
> +	ssize_t ret;
> +	u32 config;
> +	int i;
> +
> +	memset(flags_in, 0, sizeof(flags_in));
> +	memset(flags_out, 0, sizeof(flags_out));
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 3)
> +		return -EINVAL;
> +
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++)
> +		if (mgbdev->vin[i])
> +			spin_lock_irqsave(&mgbdev->vin[i]->vdev.fh_lock,
> +					  flags_in[i]);
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
> +		if (mgbdev->vout[i])
> +			spin_lock_irqsave(&mgbdev->vout[i]->vdev.fh_lock,
> +					  flags_out[i]);
> +
> +	ret = -EBUSY;
> +	for (i = 0; i < MGB4_VIN_DEVICES; i++)
> +		if (mgbdev->vin[i] && !list_empty(&mgbdev->vin[i]->vdev.fh_list))
> +			goto error;
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
> +		if (mgbdev->vout[i] && !list_empty(&mgbdev->vout[i]->vdev.fh_list))
> +			goto error;
> +
> +	config = mgb4_read_reg(&mgbdev->video, voutdev->config->regs.config);
> +
> +	if (((config & 0xc) >> 2) < MGB4_VIN_DEVICES)
> +		loopin_old = mgbdev->vin[(config & 0xc) >> 2];
> +	if (val < MGB4_VIN_DEVICES)
> +		loopin_new = mgbdev->vin[val];
> +	if (loopin_old && loopin_cnt(loopin_old) == 1)
> +		mgb4_mask_reg(&mgbdev->video, loopin_old->config->regs.config,
> +			      0x2, 0x0);
> +	if (loopin_new)
> +		mgb4_mask_reg(&mgbdev->video, loopin_new->config->regs.config,
> +			      0x2, 0x2);
> +
> +	if (val == voutdev->config->id + MGB4_VIN_DEVICES)
> +		mgb4_write_reg(&mgbdev->video, voutdev->config->regs.config,
> +			       config & ~(1 << 1));
> +	else
> +		mgb4_write_reg(&mgbdev->video, voutdev->config->regs.config,
> +			       config | (1U << 1));
> +
> +	mgb4_mask_reg(&mgbdev->video, voutdev->config->regs.config, 0xc,
> +		      val << 2);
> +
> +	ret = count;
> +
> +error:
> +	for (i = MGB4_VOUT_DEVICES - 1; i >= 0; i--)
> +		if (mgbdev->vout[i])
> +			spin_unlock_irqrestore(&mgbdev->vout[i]->vdev.fh_lock,
> +					       flags_out[i]);
> +	for (i = MGB4_VIN_DEVICES - 1; i >= 0; i--)
> +		if (mgbdev->vin[i])
> +			spin_unlock_irqrestore(&mgbdev->vin[i]->vdev.fh_lock,
> +					       flags_in[i]);
> +
> +	return ret;
> +}
> +
> +static ssize_t read_display_width(struct device *dev,
> +				  struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.resolution);
> +
> +	return sprintf(buf, "%u\n", config >> 16);
> +}
> +
> +static ssize_t write_display_width(struct device *dev,
> +				   struct device_attribute *attr,
> +				   const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val, flags;
> +	int ret, busy;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFFFF)
> +		return -EINVAL;
> +
> +	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
> +	busy = !list_empty(&voutdev->vdev.fh_list);
> +	if (busy) {
> +		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +		return -EBUSY;
> +	}
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.resolution,
> +		      0xFFFF0000, val << 16);
> +
> +	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +
> +	return count;
> +}
> +
> +static ssize_t read_display_height(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.resolution);
> +
> +	return sprintf(buf, "%u\n", config & 0xFFFF);
> +}
> +
> +static ssize_t write_display_height(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val, flags;
> +	int ret, busy;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFFFF)
> +		return -EINVAL;
> +
> +	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
> +	busy = !list_empty(&voutdev->vdev.fh_list);
> +	if (busy) {
> +		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +		return -EBUSY;
> +	}
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.resolution,
> +		      0xFFFF, val);
> +
> +	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +
> +	return count;
> +}
> +
> +static ssize_t read_frame_rate(struct device *dev,
> +			       struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 period = mgb4_read_reg(&voutdev->mgbdev->video,
> +				   voutdev->config->regs.frame_period);
> +
> +	return sprintf(buf, "%u\n", 125000000 / period);
> +}
> +
> +static ssize_t write_frame_rate(struct device *dev,
> +				struct device_attribute *attr, const char *buf,
> +				size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	mgb4_write_reg(&voutdev->mgbdev->video,
> +		       voutdev->config->regs.frame_period, 125000000 / val);
> +
> +	return count;
> +}
> +
> +static ssize_t read_hsync_width(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.hsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
> +}
> +
> +static ssize_t write_hsync_width(struct device *dev,
> +				 struct device_attribute *attr, const char *buf,
> +				 size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
> +		      0x00FF0000, val << 16);
> +
> +	return count;
> +}
> +
> +static ssize_t read_vsync_width(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.vsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
> +}
> +
> +static ssize_t write_vsync_width(struct device *dev,
> +				 struct device_attribute *attr, const char *buf,
> +				 size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
> +		      0x00FF0000, val << 16);
> +
> +	return count;
> +}
> +
> +static ssize_t read_hback_porch(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.hsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
> +}
> +
> +static ssize_t write_hback_porch(struct device *dev,
> +				 struct device_attribute *attr, const char *buf,
> +				 size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
> +		      0x0000FF00, val << 8);
> +
> +	return count;
> +}
> +
> +static ssize_t read_vback_porch(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.vsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
> +}
> +
> +static ssize_t write_vback_porch(struct device *dev,
> +				 struct device_attribute *attr, const char *buf,
> +				 size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
> +		      0x0000FF00, val << 8);
> +
> +	return count;
> +}
> +
> +static ssize_t read_hfront_porch(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.hsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x000000FF));
> +}
> +
> +static ssize_t write_hfront_porch(struct device *dev,
> +				  struct device_attribute *attr,
> +				  const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
> +		      0x000000FF, val);
> +
> +	return count;
> +}
> +
> +static ssize_t read_vfront_porch(struct device *dev,
> +				 struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
> +				voutdev->config->regs.vsync);
> +
> +	return sprintf(buf, "%u\n", (sig & 0x000000FF));
> +}
> +
> +static ssize_t write_vfront_porch(struct device *dev,
> +				  struct device_attribute *attr, const char *buf,
> +				  size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 0xFF)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
> +		      0x000000FF, val);
> +
> +	return count;
> +}
> +
> +/* FPDL3 only */
> +
> +static ssize_t read_hsync_polarity(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.hsync);
> +
> +	return sprintf(buf, "%u\n", (config & (1U << 31)) >> 31);
> +}
> +
> +static ssize_t write_hsync_polarity(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 1)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
> +		      (1U << 31), val << 31);
> +
> +	return count;
> +}
> +
> +static ssize_t read_vsync_polarity(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.vsync);
> +
> +	return sprintf(buf, "%u\n", (config & (1U << 31)) >> 31);
> +}
> +
> +static ssize_t write_vsync_polarity(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 1)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
> +		      (1U << 31), val << 31);
> +
> +	return count;
> +}
> +
> +static ssize_t read_de_polarity(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
> +	  voutdev->config->regs.vsync);
> +
> +	return sprintf(buf, "%u\n", (config & (1U << 30)) >> 30);
> +}
> +
> +static ssize_t write_de_polarity(struct device *dev,
> +				 struct device_attribute *attr, const char *buf,
> +				 size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +	if (val > 1)
> +		return -EINVAL;
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
> +		      (1U << 30), val << 30);
> +
> +	return count;
> +}
> +
> +static ssize_t read_fpdl3_output_width(struct device *dev,
> +				       struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	s32 ret;
> +
> +	mutex_lock(&voutdev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_read_byte(&voutdev->ser, 0x5B);
> +	mutex_unlock(&voutdev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	switch ((u8)ret & 0x03) {
> +	case 0:
> +		return sprintf(buf, "0\n");
> +	case 1:
> +		return sprintf(buf, "1\n");
> +	case 3:
> +		return sprintf(buf, "2\n");
> +	default:
> +		return -EINVAL;
> +	}
> +}
> +
> +static ssize_t write_fpdl3_output_width(struct device *dev,
> +					struct device_attribute *attr,
> +					const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	u8 i2c_data;
> +	unsigned long val;
> +	int ret;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case 0: /* auto */
> +		i2c_data = 0x00;
> +		break;
> +	case 1: /* single */
> +		i2c_data = 0x01;
> +		break;
> +	case 2: /* dual */
> +		i2c_data = 0x03;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	mutex_lock(&voutdev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_mask_byte(&voutdev->ser, 0x5B, 0x03, i2c_data);
> +	mutex_unlock(&voutdev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +static ssize_t read_pclk_frequency(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +
> +	return sprintf(buf, "%u\n", voutdev->freq);
> +}
> +
> +static ssize_t write_pclk_frequency(struct device *dev,
> +				    struct device_attribute *attr,
> +				    const char *buf, size_t count)
> +{
> +	struct video_device *vdev = to_video_device(dev);
> +	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
> +	unsigned long val, flags;
> +	int ret, busy;
> +	unsigned int dp;
> +
> +	ret = kstrtoul(buf, 10, &val);
> +	if (ret)
> +		return ret;
> +
> +	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
> +	busy = !list_empty(&voutdev->vdev.fh_list);
> +	if (busy) {
> +		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +		return -EBUSY;
> +	}
> +
> +	dp = (val > 50000) ? 1 : 0;
> +	voutdev->freq = mgb4_cmt_set_vout_freq(voutdev, val >> dp) << dp;
> +
> +	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
> +
> +	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.config,
> +		      0x10, dp << 4);
> +	mutex_lock(&voutdev->mgbdev->i2c_lock);
> +	ret = mgb4_i2c_mask_byte(&voutdev->ser, 0x4F, 1 << 6, ((~dp) & 1) << 6);
> +	mutex_unlock(&voutdev->mgbdev->i2c_lock);
> +	if (ret < 0)
> +		return -EIO;
> +
> +	return count;
> +}
> +
> +static DEVICE_ATTR(output_id, 0444, read_output_id, NULL);
> +static DEVICE_ATTR(video_source, 0644, read_video_source, write_video_source);
> +static DEVICE_ATTR(display_width, 0644, read_display_width,
> +		   write_display_width);
> +static DEVICE_ATTR(display_height, 0644, read_display_height,
> +		   write_display_height);
> +static DEVICE_ATTR(frame_rate, 0644, read_frame_rate, write_frame_rate);
> +static DEVICE_ATTR(hsync_polarity, 0644, read_hsync_polarity,
> +		   write_hsync_polarity);
> +static DEVICE_ATTR(vsync_polarity, 0644, read_vsync_polarity,
> +		   write_vsync_polarity);
> +static DEVICE_ATTR(de_polarity, 0644, read_de_polarity,
> +		   write_de_polarity);
> +static DEVICE_ATTR(pclk_frequency, 0644, read_pclk_frequency,
> +		   write_pclk_frequency);
> +static DEVICE_ATTR(hsync_width, 0644, read_hsync_width, write_hsync_width);
> +static DEVICE_ATTR(vsync_width, 0644, read_vsync_width, write_vsync_width);
> +static DEVICE_ATTR(hback_porch, 0644, read_hback_porch, write_hback_porch);
> +static DEVICE_ATTR(hfront_porch, 0644, read_hfront_porch, write_hfront_porch);
> +static DEVICE_ATTR(vback_porch, 0644, read_vback_porch, write_vback_porch);
> +static DEVICE_ATTR(vfront_porch, 0644, read_vfront_porch, write_vfront_porch);
> +
> +static DEVICE_ATTR(fpdl3_output_width, 0644, read_fpdl3_output_width,
> +		   write_fpdl3_output_width);

Same here.

> +
> +struct device_attribute *mgb4_fpdl3_out_attrs[] = {
> +	&dev_attr_output_id,
> +	&dev_attr_video_source,
> +	&dev_attr_display_width,
> +	&dev_attr_display_height,
> +	&dev_attr_frame_rate,
> +	&dev_attr_hsync_polarity,
> +	&dev_attr_vsync_polarity,
> +	&dev_attr_de_polarity,
> +	&dev_attr_pclk_frequency,
> +	&dev_attr_hsync_width,
> +	&dev_attr_vsync_width,
> +	&dev_attr_hback_porch,
> +	&dev_attr_hfront_porch,
> +	&dev_attr_vback_porch,
> +	&dev_attr_vfront_porch,
> +	&dev_attr_fpdl3_output_width,
> +	NULL
> +};
> +
> +struct device_attribute *mgb4_gmsl_out_attrs[] = {
> +	&dev_attr_output_id,
> +	&dev_attr_video_source,
> +	&dev_attr_display_width,
> +	&dev_attr_display_height,
> +	&dev_attr_frame_rate,
> +	NULL
> +};
> diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_pci.c b/drivers/media/pci/mgb4/mgb4_sysfs_pci.c
> new file mode 100644
> index 000000000000..f98da2c5f180
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_sysfs_pci.c
> @@ -0,0 +1,71 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This module handles all the sysfs info/configuration that is related to the
> + * PCI card device.
> + */
> +
> +#include <linux/device.h>
> +#include "mgb4_core.h"
> +#include "mgb4_sysfs.h"
> +
> +static ssize_t read_module_version(struct device *dev,
> +				   struct device_attribute *attr, char *buf)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +
> +	return sprintf(buf, "%u\n", mgbdev->module_version & 0x0F);
> +}
> +
> +static ssize_t read_module_type(struct device *dev,
> +				struct device_attribute *attr, char *buf)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +
> +	return sprintf(buf, "%u\n", mgbdev->module_version >> 4);
> +}
> +
> +static ssize_t read_fw_version(struct device *dev,
> +			       struct device_attribute *attr, char *buf)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +	u32 config = mgb4_read_reg(&mgbdev->video, 0xC4);
> +
> +	return sprintf(buf, "%u\n", config & 0xFFFF);
> +}
> +
> +static ssize_t read_fw_type(struct device *dev,
> +			    struct device_attribute *attr, char *buf)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +	u32 config = mgb4_read_reg(&mgbdev->video, 0xC4);
> +
> +	return sprintf(buf, "%u\n", config >> 24);
> +}
> +
> +static ssize_t read_serial_number(struct device *dev,
> +				  struct device_attribute *attr, char *buf)
> +{
> +	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
> +	u32 sn = mgbdev->serial_number;
> +
> +	return sprintf(buf, "%03d-%03d-%03d-%03d\n", sn >> 24, (sn >> 16) & 0xFF,
> +	  (sn >> 8) & 0xFF, sn & 0xFF);
> +}
> +
> +static DEVICE_ATTR(module_version, 0444, read_module_version, NULL);
> +static DEVICE_ATTR(module_type, 0444, read_module_type, NULL);
> +static DEVICE_ATTR(fw_version, 0444, read_fw_version, NULL);
> +static DEVICE_ATTR(fw_type, 0444, read_fw_type, NULL);
> +static DEVICE_ATTR(serial_number, 0444, read_serial_number, NULL);

And here.

> +
> +struct device_attribute *mgb4_pci_attrs[] = {
> +	&dev_attr_module_type,
> +	&dev_attr_module_version,
> +	&dev_attr_fw_type,
> +	&dev_attr_fw_version,
> +	&dev_attr_serial_number,
> +	NULL
> +};
> diff --git a/drivers/media/pci/mgb4/mgb4_trigger.c b/drivers/media/pci/mgb4/mgb4_trigger.c
> new file mode 100644
> index 000000000000..923650d53d4c
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_trigger.c
> @@ -0,0 +1,208 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This module handles the IIO trigger device. The card has two signal inputs
> + * for event triggers that can be used to record events related to the video
> + * stream. A standard linux IIO device with triggered buffer capability is
> + * created and configured that can be used to fetch the events with the same
> + * clock source as the video frames.
> + */
> +
> +#include <linux/iio/iio.h>
> +#include <linux/iio/buffer.h>
> +#include <linux/iio/trigger.h>
> +#include <linux/iio/trigger_consumer.h>
> +#include <linux/iio/triggered_buffer.h>
> +#include <linux/pci.h>
> +#include <linux/dma/amd_xdma.h>
> +#include "mgb4_core.h"
> +#include "mgb4_trigger.h"
> +
> +struct trigger_data {
> +	struct mgb4_dev *mgbdev;
> +	struct iio_trigger *trig;
> +};
> +
> +static int trigger_read_raw(struct iio_dev *indio_dev,
> +			    struct iio_chan_spec const *chan, int *val,
> +			    int *val2, long mask)
> +{
> +	struct trigger_data *st = iio_priv(indio_dev);
> +
> +	switch (mask) {
> +	case IIO_CHAN_INFO_RAW:
> +		if (iio_buffer_enabled(indio_dev))
> +			return -EBUSY;
> +		*val = mgb4_read_reg(&st->mgbdev->video, 0xA0);
> +
> +		return IIO_VAL_INT;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int trigger_set_state(struct iio_trigger *trig, bool state)
> +{
> +	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
> +	struct trigger_data *st = iio_priv(indio_dev);
> +	int irq = xdma_get_user_irq(st->mgbdev->xdev, 11);
> +
> +	if (state)
> +		xdma_enable_user_irq(st->mgbdev->xdev, irq);
> +	else
> +		xdma_disable_user_irq(st->mgbdev->xdev, irq);
> +
> +	return 0;
> +}
> +
> +static const struct iio_trigger_ops trigger_ops = {
> +	.set_trigger_state = &trigger_set_state,
> +};
> +
> +static const struct iio_info trigger_info = {
> +	.read_raw         = trigger_read_raw,
> +};
> +
> +#define TRIGGER_CHANNEL(_si) {                    \
> +	.type = IIO_ACTIVITY,                         \
> +	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> +	.scan_index = _si,                            \
> +	.scan_type = {                                \
> +		.sign = 'u',                              \
> +		.realbits = 32,                           \
> +		.storagebits = 32,                        \
> +		.shift = 0,                               \
> +		.endianness = IIO_CPU                     \
> +	},                                            \
> +}
> +
> +static const struct iio_chan_spec trigger_channels[] = {
> +	TRIGGER_CHANNEL(0),
> +	IIO_CHAN_SOFT_TIMESTAMP(1),
> +};
> +
> +static irqreturn_t trigger_handler(int irq, void *p)
> +{
> +	struct iio_poll_func *pf = p;
> +	struct iio_dev *indio_dev = pf->indio_dev;
> +	struct trigger_data *st = iio_priv(indio_dev);
> +	struct {
> +		u32 data;
> +		s64 ts __aligned(8);
> +	} scan;
> +
> +	scan.data = mgb4_read_reg(&st->mgbdev->video, 0xA0);
> +	mgb4_write_reg(&st->mgbdev->video, 0xA0, scan.data);
> +
> +	iio_push_to_buffers_with_timestamp(indio_dev, &scan, pf->timestamp);
> +	iio_trigger_notify_done(indio_dev->trig);
> +
> +	mgb4_write_reg(&st->mgbdev->video, 0xB4, 1U << 11);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static int probe_trigger(struct iio_dev *indio_dev, int irq)
> +{
> +	int ret;
> +	struct trigger_data *st = iio_priv(indio_dev);
> +
> +	st->trig = iio_trigger_alloc(&st->mgbdev->pdev->dev, "%s-dev%d",
> +				     indio_dev->name, iio_device_id(indio_dev));
> +	if (!st->trig)
> +		return -ENOMEM;
> +
> +	ret = request_irq(irq, &iio_trigger_generic_data_rdy_poll, 0,
> +			  "mgb4-trigger", st->trig);
> +	if (ret)
> +		goto error_free_trig;
> +
> +	st->trig->ops = &trigger_ops;
> +	iio_trigger_set_drvdata(st->trig, indio_dev);
> +	ret = iio_trigger_register(st->trig);
> +	if (ret)
> +		goto error_free_irq;
> +
> +	indio_dev->trig = iio_trigger_get(st->trig);
> +
> +	return 0;
> +
> +error_free_irq:
> +	free_irq(irq, st->trig);
> +error_free_trig:
> +	iio_trigger_free(st->trig);
> +
> +	return ret;
> +}
> +
> +static void remove_trigger(struct iio_dev *indio_dev, int irq)
> +{
> +	struct trigger_data *st = iio_priv(indio_dev);
> +
> +	iio_trigger_unregister(st->trig);
> +	free_irq(irq, st->trig);
> +	iio_trigger_free(st->trig);
> +}
> +
> +struct iio_dev *mgb4_trigger_create(struct mgb4_dev *mgbdev)
> +{
> +	struct iio_dev *indio_dev;
> +	struct trigger_data *data;
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +	int rv, irq;
> +
> +	indio_dev = iio_device_alloc(dev, sizeof(*data));
> +	if (!indio_dev)
> +		return NULL;
> +
> +	indio_dev->info = &trigger_info;
> +	indio_dev->name = "mgb4";
> +	indio_dev->modes = INDIO_DIRECT_MODE;
> +	indio_dev->channels = trigger_channels;
> +	indio_dev->num_channels = ARRAY_SIZE(trigger_channels);
> +
> +	data = iio_priv(indio_dev);
> +	data->mgbdev = mgbdev;
> +
> +	irq = xdma_get_user_irq(mgbdev->xdev, 11);
> +	rv = probe_trigger(indio_dev, irq);
> +	if (rv < 0) {
> +		dev_err(dev, "iio triggered setup failed\n");
> +		goto error_alloc;
> +	}
> +	rv = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
> +					trigger_handler, NULL);
> +	if (rv < 0) {
> +		dev_err(dev, "iio triggered buffer setup failed\n");
> +		goto error_trigger;
> +	}
> +	rv = iio_device_register(indio_dev);
> +	if (rv < 0) {
> +		dev_err(dev, "iio device register failed\n");
> +		goto error_buffer;
> +	}
> +
> +	return indio_dev;
> +
> +error_buffer:
> +	iio_triggered_buffer_cleanup(indio_dev);
> +error_trigger:
> +	remove_trigger(indio_dev, irq);
> +error_alloc:
> +	iio_device_free(indio_dev);
> +
> +	return NULL;
> +}
> +
> +void mgb4_trigger_free(struct iio_dev *indio_dev)
> +{
> +	struct trigger_data *st = iio_priv(indio_dev);
> +
> +	iio_device_unregister(indio_dev);
> +	iio_triggered_buffer_cleanup(indio_dev);
> +	remove_trigger(indio_dev, xdma_get_user_irq(st->mgbdev->xdev, 11));
> +	iio_device_free(indio_dev);
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_trigger.h b/drivers/media/pci/mgb4/mgb4_trigger.h
> new file mode 100644
> index 000000000000..6c25bc4576f6
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_trigger.h
> @@ -0,0 +1,8 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2022 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +struct iio_dev *mgb4_trigger_create(struct mgb4_dev *mgbdev);
> +void mgb4_trigger_free(struct iio_dev *indio_dev);
> diff --git a/drivers/media/pci/mgb4/mgb4_vin.c b/drivers/media/pci/mgb4/mgb4_vin.c
> new file mode 100644
> index 000000000000..4712e966595a
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_vin.c
> @@ -0,0 +1,930 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This is the v4l2 input device module. It initializes the signal deserializers
> + * and creates the v4l2 video devices. The input signal can change at any time
> + * which is handled by the "timings" callbacks and an IRQ based watcher, that
> + * emits the V4L2_EVENT_SOURCE_CHANGE event in case of a signal source change.
> + *
> + * When the device is in loopback mode (a direct, in HW, in->out frame passing
> + * mode) the card's frame queue must be running regardless of whether a v4l2
> + * stream is running and the output parameters like frame buffers padding must
> + * be in sync with the input parameters.
> + */
> +
> +#include <linux/pci.h>
> +#include <linux/workqueue.h>
> +#include <linux/align.h>
> +#include <linux/dma/amd_xdma.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/videobuf2-v4l2.h>
> +#include <media/videobuf2-dma-sg.h>
> +#include <media/v4l2-dv-timings.h>
> +#include <media/v4l2-event.h>
> +#include "mgb4_core.h"
> +#include "mgb4_dma.h"
> +#include "mgb4_sysfs.h"
> +#include "mgb4_io.h"
> +#include "mgb4_vout.h"
> +#include "mgb4_vin.h"
> +
> +static const struct mgb4_vin_config vin_cfg[] = {
> +	{0, 0, 0, 6, {0x10, 0x00, 0x04, 0x08, 0x1C, 0x14, 0x18, 0x20, 0x24, 0x28}},
> +	{1, 1, 1, 7, {0x40, 0x30, 0x34, 0x38, 0x4C, 0x44, 0x48, 0x50, 0x54, 0x58}}
> +};
> +
> +static const struct i2c_board_info fpdl3_deser_info[] = {
> +	{I2C_BOARD_INFO("deserializer1", 0x38)},
> +	{I2C_BOARD_INFO("deserializer2", 0x36)},
> +};
> +
> +static const struct i2c_board_info gmsl_deser_info[] = {
> +	{I2C_BOARD_INFO("deserializer1", 0x4C)},
> +	{I2C_BOARD_INFO("deserializer2", 0x2A)},
> +};
> +
> +static const struct mgb4_i2c_kv fpdl3_i2c[] = {
> +	{0x06, 0xFF, 0x04}, {0x07, 0xFF, 0x01}, {0x45, 0xFF, 0xE8},
> +	{0x49, 0xFF, 0x00}, {0x34, 0xFF, 0x00}, {0x23, 0xFF, 0x00}
> +};
> +
> +static const struct mgb4_i2c_kv gmsl_i2c[] = {
> +	{0x01, 0x03, 0x03}, {0x300, 0x0C, 0x0C}, {0x03, 0xC0, 0xC0},
> +	{0x1CE, 0x0E, 0x0E}, {0x11, 0x05, 0x00}, {0x05, 0xC0, 0x40},
> +	{0x307, 0x0F, 0x00}, {0xA0, 0x03, 0x00}, {0x3E0, 0x07, 0x07},
> +	{0x308, 0x01, 0x01}, {0x10, 0x20, 0x20}, {0x300, 0x40, 0x40}
> +};
> +
> +static const struct v4l2_dv_timings_cap video_timings_cap = {
> +	.type = V4L2_DV_BT_656_1120,
> +	.bt = {
> +		.min_width = 320,
> +		.max_width = 4096,
> +		.min_height = 240,
> +		.max_height = 2160,
> +		.min_pixelclock = 1843200, /* 320 x 240 x 24Hz */
> +		.max_pixelclock = 530841600, /* 4096 x 2160 x 60Hz */
> +		.standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
> +			V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
> +		.capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
> +			V4L2_DV_BT_CAP_CUSTOM,
> +	},
> +};
> +
> +/*
> + * Returns the video output connected with the given video input if the input
> + * is in loopback mode.
> + */
> +static struct mgb4_vout_dev *loopback_dev(struct mgb4_vin_dev *vindev, int i)
> +{
> +	struct mgb4_vout_dev *voutdev;
> +	u32 config;
> +
> +	voutdev = vindev->mgbdev->vout[i];
> +	if (!voutdev)
> +		return NULL;
> +
> +	config = mgb4_read_reg(&voutdev->mgbdev->video,
> +			       voutdev->config->regs.config);
> +	if ((config & 0xc) >> 2 == vindev->config->id)
> +		return voutdev;
> +
> +	return NULL;
> +}
> +
> +/*
> + * Check, whether the loopback mode - a HW INPUT->OUTPUT transmission - is
> + * enabled on the given input.
> + */
> +static int loopback_active(struct mgb4_vin_dev *vindev)
> +{
> +	int i;
> +
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
> +		if (loopback_dev(vindev, i))
> +			return 1;
> +
> +	return 0;
> +}
> +
> +/*
> + * Set the output frame buffer padding of all outputs connected with the given
> + * input when the video input is set to loopback mode. The paddings must be
> + * the same for the loopback to work properly.
> + */
> +static void set_loopback_padding(struct mgb4_vin_dev *vindev, u32 padding)
> +{
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	struct mgb4_vout_dev *voutdev;
> +	int i;
> +
> +	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
> +		voutdev = loopback_dev(vindev, i);
> +		if (voutdev)
> +			mgb4_write_reg(video, voutdev->config->regs.padding,
> +				       padding);
> +	}
> +}
> +
> +static int get_timings(struct mgb4_vin_dev *vindev,
> +		       struct v4l2_dv_timings *timings)
> +{
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	const struct mgb4_vin_regs *regs = &vindev->config->regs;
> +
> +	u32 status = mgb4_read_reg(video, regs->status);
> +	u32 pclk = mgb4_read_reg(video, regs->pclk);
> +	u32 signal = mgb4_read_reg(video, regs->signal);
> +	u32 signal2 = mgb4_read_reg(video, regs->signal2);
> +	u32 resolution = mgb4_read_reg(video, regs->resolution);
> +
> +	if (!(status & (1U << 2)))
> +		return -ENOLCK;
> +	if (!(status & (3 << 9)))
> +		return -ENOLINK;
> +
> +	memset(timings, 0, sizeof(*timings));
> +	timings->type = V4L2_DV_BT_656_1120;
> +	timings->bt.width = resolution >> 16;
> +	timings->bt.height = resolution & 0xFFFF;
> +	if (status & (1U << 12))
> +		timings->bt.polarities |= V4L2_DV_HSYNC_POS_POL;
> +	if (status & (1U << 13))
> +		timings->bt.polarities |= V4L2_DV_VSYNC_POS_POL;
> +	timings->bt.pixelclock = pclk * 1000;
> +	timings->bt.hsync = (signal & 0x00FF0000) >> 16;
> +	timings->bt.vsync = (signal2 & 0x00FF0000) >> 16;
> +	timings->bt.hbackporch = (signal & 0x0000FF00) >> 8;
> +	timings->bt.hfrontporch = signal & 0x000000FF;
> +	timings->bt.vbackporch = (signal2 & 0x0000FF00) >> 8;
> +	timings->bt.vfrontporch = signal2 & 0x000000FF;
> +
> +	return 0;
> +}
> +
> +static void return_all_buffers(struct mgb4_vin_dev *vindev,
> +			       enum vb2_buffer_state state)
> +{
> +	struct mgb4_frame_buffer *buf, *node;
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&vindev->qlock, flags);
> +	list_for_each_entry_safe(buf, node, &vindev->buf_list, list) {
> +		vb2_buffer_done(&buf->vb.vb2_buf, state);
> +		list_del(&buf->list);
> +	}
> +	spin_unlock_irqrestore(&vindev->qlock, flags);
> +}
> +
> +static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
> +		       unsigned int *nplanes, unsigned int sizes[],
> +		       struct device *alloc_devs[])
> +{
> +	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(q);
> +	unsigned int size = (vindev->timings.bt.width + vindev->padding)
> +	 * vindev->timings.bt.height * 4;
> +
> +	if (!size)
> +		return -EINVAL;
> +
> +	if (*nplanes)
> +		return sizes[0] < size ? -EINVAL : 0;
> +	*nplanes = 1;
> +	sizes[0] = size;
> +
> +	return 0;
> +}
> +
> +static int buffer_init(struct vb2_buffer *vb)
> +{
> +	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
> +
> +	INIT_LIST_HEAD(&buf->list);
> +
> +	return 0;
> +}
> +
> +static int buffer_prepare(struct vb2_buffer *vb)
> +{
> +	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
> +	struct device *dev = &vindev->mgbdev->pdev->dev;
> +	unsigned int size = (vindev->timings.bt.width + vindev->padding)
> +	 * vindev->timings.bt.height * 4;
> +
> +	if (vb2_plane_size(vb, 0) < size) {
> +		dev_err(dev, "buffer too small (%lu < %u)\n",
> +			vb2_plane_size(vb, 0), size);
> +		return -EINVAL;
> +	}
> +
> +	vb2_set_plane_payload(vb, 0, size);
> +
> +	return 0;
> +}
> +
> +static void buffer_queue(struct vb2_buffer *vb)
> +{
> +	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
> +	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&vindev->qlock, flags);
> +	list_add_tail(&buf->list, &vindev->buf_list);
> +	spin_unlock_irqrestore(&vindev->qlock, flags);
> +}
> +
> +static void stop_streaming(struct vb2_queue *vq)
> +{
> +	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
> +	const struct mgb4_vin_config *config = vindev->config;
> +	int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
> +
> +	xdma_disable_user_irq(vindev->mgbdev->xdev, irq);
> +
> +	/*
> +	 * In loopback mode, the HW frame queue must be left running for
> +	 * the IN->OUT transmission to work!
> +	 */
> +	if (!loopback_active(vindev))
> +		mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
> +			      0x0);
> +
> +	cancel_work_sync(&vindev->dma_work);
> +	return_all_buffers(vindev, VB2_BUF_STATE_ERROR);
> +}
> +
> +static int start_streaming(struct vb2_queue *vq, unsigned int count)
> +{
> +	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
> +	const struct mgb4_vin_config *config = vindev->config;
> +	int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
> +
> +	vindev->sequence = 0;
> +
> +	/*
> +	 * In loopback mode, the HW frame queue is already running.
> +	 */
> +	if (!loopback_active(vindev))
> +		mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
> +			      0x2);
> +
> +	xdma_enable_user_irq(vindev->mgbdev->xdev, irq);
> +
> +	return 0;
> +}
> +
> +static const struct vb2_ops queue_ops = {
> +	.queue_setup = queue_setup,
> +	.buf_init = buffer_init,
> +	.buf_prepare = buffer_prepare,
> +	.buf_queue = buffer_queue,
> +	.start_streaming = start_streaming,
> +	.stop_streaming = stop_streaming,
> +	.wait_prepare = vb2_ops_wait_prepare,
> +	.wait_finish = vb2_ops_wait_finish
> +};
> +
> +static int fh_open(struct file *file)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	int rv;
> +
> +	mutex_lock(&vindev->lock);
> +
> +	rv = v4l2_fh_open(file);
> +	if (rv)
> +		goto out;
> +
> +	if (!v4l2_fh_is_singular_file(file))
> +		goto out;
> +
> +	get_timings(vindev, &vindev->timings);
> +	set_loopback_padding(vindev, vindev->padding);
> +
> +out:
> +	mutex_unlock(&vindev->lock);
> +	return rv;
> +}
> +
> +static int fh_release(struct file *file)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	int rv;
> +
> +	mutex_lock(&vindev->lock);
> +
> +	if (v4l2_fh_is_singular_file(file))
> +		set_loopback_padding(vindev, 0);
> +
> +	rv = _vb2_fop_release(file, NULL);
> +
> +	mutex_unlock(&vindev->lock);
> +
> +	return rv;
> +}
> +
> +static const struct v4l2_file_operations video_fops = {
> +	.owner = THIS_MODULE,
> +	.open = fh_open,
> +	.release = fh_release,
> +	.unlocked_ioctl = video_ioctl2,
> +	.read = vb2_fop_read,
> +	.mmap = vb2_fop_mmap,
> +	.poll = vb2_fop_poll,
> +};
> +
> +static int vidioc_querycap(struct file *file, void *priv,
> +			   struct v4l2_capability *cap)
> +{
> +	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
> +	strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
> +
> +	return 0;
> +}
> +
> +static int vidioc_enum_fmt(struct file *file, void *priv,
> +			   struct v4l2_fmtdesc *f)
> +{
> +	if (f->index != 0)
> +		return -EINVAL;
> +
> +	f->pixelformat = V4L2_PIX_FMT_ABGR32;
> +
> +	return 0;
> +}
> +
> +static int vidioc_enum_frameintervals(struct file *file, void *priv,
> +				      struct v4l2_frmivalenum *ival)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	if (ival->index != 0)
> +		return -EINVAL;
> +	if (ival->pixel_format != V4L2_PIX_FMT_ABGR32)
> +		return -EINVAL;
> +	if (ival->width != vindev->timings.bt.width ||
> +	    ival->height != vindev->timings.bt.height)
> +		return -EINVAL;
> +
> +	ival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
> +	ival->stepwise.min.denominator = 60;
> +	ival->stepwise.min.numerator = 1;
> +	ival->stepwise.max.denominator = 1;
> +	ival->stepwise.max.numerator = 1;
> +	ival->stepwise.step = ival->stepwise.max;
> +
> +	return 0;
> +}
> +
> +static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = vindev->timings.bt.width;
> +	f->fmt.pix.height = vindev->timings.bt.height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = (f->fmt.pix.width + vindev->padding) * 4;
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
> +
> +	return 0;
> +}
> +
> +static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +
> +	if (vb2_is_busy(&vindev->queue))
> +		return -EBUSY;
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = vindev->timings.bt.width;
> +	f->fmt.pix.height = vindev->timings.bt.height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
> +				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;

s_fmt can call try_fmt for these calculations.

> +
> +	vindev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width * 4)) / 4;
> +	mgb4_write_reg(video, vindev->config->regs.padding, vindev->padding);
> +	set_loopback_padding(vindev, vindev->padding);
> +
> +	return 0;
> +}
> +
> +static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = vindev->timings.bt.width;
> +	f->fmt.pix.height = vindev->timings.bt.height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
> +				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
> +
> +	return 0;
> +}
> +
> +static int vidioc_enum_input(struct file *file, void *priv,
> +			     struct v4l2_input *i)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	u32 status;
> +
> +	if (i->index != 0)
> +		return -EINVAL;
> +
> +	strscpy(i->name, "MGB4", sizeof(i->name));
> +	i->type = V4L2_INPUT_TYPE_CAMERA;
> +	i->capabilities = V4L2_IN_CAP_DV_TIMINGS;
> +	i->status = 0;
> +
> +	status = mgb4_read_reg(video, vindev->config->regs.status);
> +	if (!(status & (1U << 2)))
> +		i->status |= V4L2_IN_ST_NO_SYNC;
> +	if (!(status & (3 << 9)))
> +		i->status |= V4L2_IN_ST_NO_SIGNAL;
> +
> +	return 0;
> +}
> +
> +static int vidioc_enum_framesizes(struct file *file, void *fh,
> +				  struct v4l2_frmsizeenum *fsize)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	if (fsize->index != 0 || fsize->pixel_format != V4L2_PIX_FMT_ABGR32)
> +		return -EINVAL;
> +
> +	fsize->discrete.width = vindev->timings.bt.width;
> +	fsize->discrete.height = vindev->timings.bt.height;
> +	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> +
> +	return 0;
> +}
> +
> +static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
> +{
> +	return (i == 0) ? 0 : -EINVAL;
> +}
> +
> +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
> +{
> +	*i = 0;
> +	return 0;
> +}
> +
> +static int vidioc_parm(struct file *file, void *priv,
> +		       struct v4l2_streamparm *parm)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	const struct mgb4_vin_regs *regs = &vindev->config->regs;
> +	struct v4l2_fract timeperframe = {
> +		.numerator = mgb4_read_reg(video, regs->frame_period),
> +		.denominator = 125000000,
> +	};
> +
> +	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> +		return -EINVAL;
> +
> +	parm->parm.capture.readbuffers = 2;
> +	parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
> +	parm->parm.capture.timeperframe = timeperframe;
> +
> +	return 0;
> +}
> +
> +static int vidioc_s_dv_timings(struct file *file, void *fh,
> +			       struct v4l2_dv_timings *timings)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	if (timings->bt.width < video_timings_cap.bt.min_width ||
> +	    timings->bt.width > video_timings_cap.bt.max_width ||
> +	    timings->bt.height < video_timings_cap.bt.min_height ||
> +	    timings->bt.height > video_timings_cap.bt.max_height)
> +		return -EINVAL;
> +	if (timings->bt.width == vindev->timings.bt.width &&
> +	    timings->bt.height == vindev->timings.bt.height)
> +		return 0;
> +	if (vb2_is_busy(&vindev->queue))
> +		return -EBUSY;
> +
> +	vindev->timings = *timings;
> +
> +	return 0;
> +}
> +
> +static int vidioc_g_dv_timings(struct file *file, void *fh,
> +			       struct v4l2_dv_timings *timings)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +	*timings = vindev->timings;
> +
> +	return 0;
> +}
> +
> +static int vidioc_query_dv_timings(struct file *file, void *fh,
> +				   struct v4l2_dv_timings *timings)
> +{
> +	struct mgb4_vin_dev *vindev = video_drvdata(file);
> +
> +	return get_timings(vindev, timings);
> +}
> +
> +static int vidioc_enum_dv_timings(struct file *file, void *fh,
> +				  struct v4l2_enum_dv_timings *timings)
> +{
> +	return v4l2_enum_dv_timings_cap(timings, &video_timings_cap, NULL, NULL);
> +}
> +
> +static int vidioc_dv_timings_cap(struct file *file, void *fh,
> +				 struct v4l2_dv_timings_cap *cap)
> +{
> +	*cap = video_timings_cap;
> +
> +	return 0;
> +}
> +
> +static int vidioc_subscribe_event(struct v4l2_fh *fh,
> +				  const struct v4l2_event_subscription *sub)
> +{
> +	switch (sub->type) {
> +	case V4L2_EVENT_SOURCE_CHANGE:
> +		return v4l2_src_change_event_subscribe(fh, sub);
> +	}
> +
> +	return v4l2_ctrl_subscribe_event(fh, sub);
> +}
> +
> +static const struct v4l2_ioctl_ops video_ioctl_ops = {
> +	.vidioc_querycap = vidioc_querycap,
> +	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
> +	.vidioc_try_fmt_vid_cap = vidioc_try_fmt,
> +	.vidioc_s_fmt_vid_cap = vidioc_s_fmt,
> +	.vidioc_g_fmt_vid_cap = vidioc_g_fmt,
> +	.vidioc_enum_framesizes = vidioc_enum_framesizes,
> +	.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
> +	.vidioc_enum_input = vidioc_enum_input,
> +	.vidioc_g_input = vidioc_g_input,
> +	.vidioc_s_input = vidioc_s_input,
> +	.vidioc_reqbufs = vb2_ioctl_reqbufs,
> +	.vidioc_create_bufs = vb2_ioctl_create_bufs,
> +	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
> +	.vidioc_querybuf = vb2_ioctl_querybuf,
> +	.vidioc_qbuf = vb2_ioctl_qbuf,
> +	.vidioc_dqbuf = vb2_ioctl_dqbuf,
> +	.vidioc_expbuf = vb2_ioctl_expbuf,
> +	.vidioc_streamon = vb2_ioctl_streamon,
> +	.vidioc_streamoff = vb2_ioctl_streamoff,
> +	.vidioc_g_parm = vidioc_parm,
> +	.vidioc_s_parm = vidioc_parm,
> +	.vidioc_dv_timings_cap = vidioc_dv_timings_cap,
> +	.vidioc_enum_dv_timings = vidioc_enum_dv_timings,
> +	.vidioc_g_dv_timings = vidioc_g_dv_timings,
> +	.vidioc_s_dv_timings = vidioc_s_dv_timings,
> +	.vidioc_query_dv_timings = vidioc_query_dv_timings,
> +	.vidioc_subscribe_event = vidioc_subscribe_event,
> +	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
> +};
> +
> +static void dma_transfer(struct work_struct *work)
> +{
> +	struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
> +						   dma_work);
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	struct device *dev = &vindev->mgbdev->pdev->dev;
> +	struct mgb4_frame_buffer *buf = 0;
> +	unsigned long flags;
> +	u32 addr;
> +	int rv;
> +
> +	spin_lock_irqsave(&vindev->qlock, flags);
> +	if (!list_empty(&vindev->buf_list)) {
> +		buf = list_first_entry(&vindev->buf_list,
> +				       struct mgb4_frame_buffer, list);
> +		list_del_init(vindev->buf_list.next);
> +	}
> +	spin_unlock_irqrestore(&vindev->qlock, flags);
> +
> +	if (!buf)
> +		return;
> +
> +	addr = mgb4_read_reg(video, vindev->config->regs.address);
> +	if (addr >= MGB4_ERR_QUEUE_FULL) {
> +		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> +		return;
> +	}
> +
> +	rv = mgb4_dma_transfer(vindev->mgbdev, vindev->config->dma_channel,
> +			       false, addr,
> +			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
> +	if (rv < 0) {
> +		dev_warn(dev, "DMA transfer error\n");
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> +	} else {
> +		buf->vb.vb2_buf.timestamp = ktime_get_ns();
> +		buf->vb.sequence = vindev->sequence++;
> +		buf->vb.field = V4L2_FIELD_NONE;
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
> +	}
> +}
> +
> +static void signal_change(struct work_struct *work)
> +{
> +	struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
> +						   err_work);
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	struct v4l2_bt_timings *timings = &vindev->timings.bt;
> +	struct device *dev = &vindev->mgbdev->pdev->dev;
> +
> +	u32 resolution = mgb4_read_reg(video, vindev->config->regs.resolution);
> +	u32 width = resolution >> 16;
> +	u32 height = resolution & 0xFFFF;
> +
> +	if (timings->width != width || timings->height != height) {
> +		static const struct v4l2_event ev = {
> +			.type = V4L2_EVENT_SOURCE_CHANGE,
> +			.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
> +		};
> +
> +		v4l2_event_queue(&vindev->vdev, &ev);
> +
> +		if (vb2_is_streaming(&vindev->queue))
> +			vb2_queue_error(&vindev->queue);
> +	}
> +
> +	dev_dbg(dev, "stream changed to %ux%u\n", width, height);
> +}
> +
> +static irqreturn_t vin_handler(int irq, void *ctx)
> +{
> +	struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +
> +	schedule_work(&vindev->dma_work);
> +
> +	mgb4_write_reg(video, 0xB4, 1U << vindev->config->vin_irq);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t err_handler(int irq, void *ctx)
> +{
> +	struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +
> +	schedule_work(&vindev->err_work);
> +
> +	mgb4_write_reg(video, 0xB4, 1U << vindev->config->err_irq);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static int deser_init(struct mgb4_vin_dev *vindev, int id)
> +{
> +	int rv, addr_size;
> +	size_t values_count;
> +	const struct mgb4_i2c_kv *values;
> +	const struct i2c_board_info *info;
> +	struct device *dev = &vindev->mgbdev->pdev->dev;
> +
> +	if (MGB4_IS_GMSL(vindev->mgbdev)) {
> +		info = &gmsl_deser_info[id];
> +		addr_size = 16;
> +		values = gmsl_i2c;
> +		values_count = ARRAY_SIZE(gmsl_i2c);
> +	} else {
> +		info = &fpdl3_deser_info[id];
> +		addr_size = 8;
> +		values = fpdl3_i2c;
> +		values_count = ARRAY_SIZE(fpdl3_i2c);
> +	}
> +
> +	rv = mgb4_i2c_init(&vindev->deser, vindev->mgbdev->i2c_adap, info,
> +			   addr_size);
> +	if (rv < 0) {
> +		dev_err(dev, "failed to create deserializer\n");
> +		return rv;
> +	}
> +	rv = mgb4_i2c_configure(&vindev->deser, values, values_count);
> +	if (rv < 0) {
> +		dev_err(dev, "failed to configure deserializer\n");
> +		goto err_i2c_dev;
> +	}
> +
> +	return 0;
> +
> +err_i2c_dev:
> +	mgb4_i2c_free(&vindev->deser);
> +
> +	return rv;
> +}
> +
> +static void fpga_init(struct mgb4_vin_dev *vindev)
> +{
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +	const struct mgb4_vin_regs *regs = &vindev->config->regs;
> +
> +	mgb4_write_reg(video, regs->config, 0x00000001);
> +	mgb4_write_reg(video, regs->sync, 0x03E80002);
> +	mgb4_write_reg(video, regs->padding, 0x00000000);
> +	mgb4_write_reg(video, regs->config, 1U << 9);
> +}
> +
> +#ifdef CONFIG_DEBUG_FS
> +static void debugfs_init(struct mgb4_vin_dev *vindev)
> +{
> +	struct mgb4_regs *video = &vindev->mgbdev->video;
> +
> +	vindev->debugfs = debugfs_create_dir(vindev->vdev.name,
> +					     vindev->mgbdev->debugfs);
> +	if (!vindev->debugfs)
> +		return;
> +
> +	vindev->regs[0].name = "CONFIG";
> +	vindev->regs[0].offset = vindev->config->regs.config;
> +	vindev->regs[1].name = "STATUS";
> +	vindev->regs[1].offset = vindev->config->regs.status;
> +	vindev->regs[2].name = "RESOLUTION";
> +	vindev->regs[2].offset = vindev->config->regs.resolution;
> +	vindev->regs[3].name = "FRAME_PERIOD";
> +	vindev->regs[3].offset = vindev->config->regs.frame_period;
> +	vindev->regs[4].name = "HS_VS_GENER_SETTINGS";
> +	vindev->regs[4].offset = vindev->config->regs.sync;
> +	vindev->regs[5].name = "PCLK_FREQUENCY";
> +	vindev->regs[5].offset = vindev->config->regs.pclk;
> +	vindev->regs[6].name = "VIDEO_PARAMS_1";
> +	vindev->regs[6].offset = vindev->config->regs.signal;
> +	vindev->regs[7].name = "VIDEO_PARAMS_2";
> +	vindev->regs[7].offset = vindev->config->regs.signal2;
> +	vindev->regs[8].name = "PADDING_PIXELS";
> +	vindev->regs[8].offset = vindev->config->regs.padding;
> +
> +	vindev->regset.base = video->membase;
> +	vindev->regset.regs = vindev->regs;
> +	vindev->regset.nregs = ARRAY_SIZE(vindev->regs);
> +
> +	debugfs_create_regset32("registers", 0444, vindev->debugfs,
> +				&vindev->regset);
> +}
> +#endif
> +
> +struct mgb4_vin_dev *mgb4_vin_create(struct mgb4_dev *mgbdev, int id)
> +{
> +	int rv;
> +	struct device_attribute **attr, **module_attr;
> +	struct mgb4_vin_dev *vindev;
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +	int vin_irq, err_irq;
> +
> +	vindev = kzalloc(sizeof(*vindev), GFP_KERNEL);
> +	if (!vindev)
> +		return NULL;
> +
> +	vindev->mgbdev = mgbdev;
> +	vindev->config = &vin_cfg[id];
> +
> +	/* Frame queue*/
> +	INIT_LIST_HEAD(&vindev->buf_list);
> +	spin_lock_init(&vindev->qlock);
> +
> +	/* Work queues */
> +	INIT_WORK(&vindev->dma_work, dma_transfer);
> +	INIT_WORK(&vindev->err_work, signal_change);
> +
> +	/* IRQ callback */
> +	vin_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->vin_irq);
> +	rv = request_irq(vin_irq, vin_handler, 0, "mgb4-vin", vindev);
> +	if (rv) {
> +		dev_err(dev, "failed to register vin irq handler\n");
> +		goto err_alloc;
> +	}
> +	/* Error IRQ callback */
> +	err_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->err_irq);
> +	rv = request_irq(err_irq, err_handler, 0, "mgb4-err", vindev);
> +	if (rv) {
> +		dev_err(dev, "failed to register err irq handler\n");
> +		goto err_vin_irq;
> +	}
> +
> +	/* Set the FPGA registers default values */
> +	fpga_init(vindev);
> +
> +	/* Set the deserializer default values */
> +	rv = deser_init(vindev, id);
> +	if (rv)
> +		goto err_err_irq;
> +
> +	/* V4L2 stuff init */
> +	rv = v4l2_device_register(dev, &vindev->v4l2dev);
> +	if (rv) {
> +		dev_err(dev, "failed to register v4l2 device\n");
> +		goto err_err_irq;
> +	}
> +
> +	mutex_init(&vindev->lock);
> +
> +	vindev->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> +	vindev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
> +	vindev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
> +	vindev->queue.ops = &queue_ops;
> +	vindev->queue.mem_ops = &vb2_dma_sg_memops;
> +	vindev->queue.gfp_flags = GFP_DMA32;
> +	vindev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> +	vindev->queue.min_buffers_needed = 2;
> +	vindev->queue.drv_priv = vindev;
> +	vindev->queue.lock = &vindev->lock;
> +	vindev->queue.dev = dev;
> +	rv = vb2_queue_init(&vindev->queue);
> +	if (rv) {
> +		dev_err(dev, "failed to initialize vb2 queue\n");
> +		goto err_v4l2_dev;
> +	}
> +
> +	snprintf(vindev->vdev.name, sizeof(vindev->vdev.name), "mgb4-in%d",
> +		 id + 1);
> +	vindev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE
> +	  | V4L2_CAP_STREAMING;
> +	vindev->vdev.fops = &video_fops;
> +	vindev->vdev.ioctl_ops = &video_ioctl_ops;
> +	vindev->vdev.release = video_device_release_empty;
> +	vindev->vdev.v4l2_dev = &vindev->v4l2dev;
> +	vindev->vdev.lock = &vindev->lock;
> +	vindev->vdev.queue = &vindev->queue;
> +	video_set_drvdata(&vindev->vdev, vindev);
> +
> +	/* Enable the video signal change watcher */
> +	xdma_enable_user_irq(vindev->mgbdev->xdev, err_irq);
> +
> +	/* Register the video device */
> +	rv = video_register_device(&vindev->vdev, VFL_TYPE_VIDEO, -1);
> +	if (rv) {
> +		dev_err(dev, "failed to register video device\n");
> +		goto err_v4l2_dev;
> +	}
> +
> +	/* Module sysfs attributes */
> +	module_attr = MGB4_IS_GMSL(mgbdev)
> +	  ? mgb4_gmsl_in_attrs : mgb4_fpdl3_in_attrs;
> +	for (attr = module_attr; *attr; attr++)
> +		device_create_file(&vindev->vdev.dev, *attr);

I believe this can be simplified by using ATTRIBUTE_GROUPS and the
dev_groups field in the struct pci_driver. This will then be automatically
created and removed.

> +
> +#ifdef CONFIG_DEBUG_FS
> +	debugfs_init(vindev);
> +#endif
> +
> +	return vindev;
> +
> +err_v4l2_dev:
> +	v4l2_device_unregister(&vindev->v4l2dev);
> +err_err_irq:
> +	free_irq(err_irq, vindev);
> +err_vin_irq:
> +	free_irq(vin_irq, vindev);
> +err_alloc:
> +	kfree(vindev);
> +
> +	return NULL;
> +}
> +
> +void mgb4_vin_free(struct mgb4_vin_dev *vindev)
> +{
> +	struct device_attribute **attr, **module_attr;
> +	int vin_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
> +					vindev->config->vin_irq);
> +	int err_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
> +					vindev->config->err_irq);
> +
> +	xdma_disable_user_irq(vindev->mgbdev->xdev, err_irq);
> +
> +	free_irq(vin_irq, vindev);
> +	free_irq(err_irq, vindev);
> +
> +	debugfs_remove_recursive(vindev->debugfs);
> +
> +	module_attr = MGB4_IS_GMSL(vindev->mgbdev)
> +	  ? mgb4_gmsl_in_attrs : mgb4_fpdl3_in_attrs;
> +	for (attr = module_attr; *attr; attr++)
> +		device_remove_file(&vindev->vdev.dev, *attr);
> +
> +	mgb4_i2c_free(&vindev->deser);
> +	video_unregister_device(&vindev->vdev);
> +	v4l2_device_unregister(&vindev->v4l2dev);
> +
> +	kfree(vindev);
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_vin.h b/drivers/media/pci/mgb4/mgb4_vin.h
> new file mode 100644
> index 000000000000..0249b400ad4d
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_vin.h
> @@ -0,0 +1,69 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_VIN_H__
> +#define __MGB4_VIN_H__
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/videobuf2-core.h>
> +#include <linux/debugfs.h>
> +#include "mgb4_i2c.h"
> +
> +struct mgb4_vin_regs {
> +	u32 address;
> +	u32 config;
> +	u32 status;
> +	u32 resolution;
> +	u32 frame_period;
> +	u32 sync;
> +	u32 pclk;
> +	u32 signal;
> +	u32 signal2;
> +	u32 padding;
> +};
> +
> +struct mgb4_vin_config {
> +	int id;
> +	int dma_channel;
> +	int vin_irq;
> +	int err_irq;
> +	struct mgb4_vin_regs regs;
> +};
> +
> +struct mgb4_vin_dev {
> +	struct mgb4_dev *mgbdev;
> +	struct v4l2_device v4l2dev;
> +	struct video_device vdev;
> +	struct vb2_queue queue;
> +	struct mutex lock; /* vdev lock */
> +
> +	spinlock_t qlock; /* video buffer queue lock */
> +	struct list_head buf_list;
> +	struct work_struct dma_work, err_work;
> +
> +	unsigned int sequence;
> +
> +	struct v4l2_dv_timings timings;
> +	u32 freq_range;
> +	u32 padding;
> +
> +	struct mgb4_i2c_client deser;
> +
> +	const struct mgb4_vin_config *config;
> +
> +#ifdef CONFIG_DEBUG_FS
> +	struct dentry *debugfs;
> +	struct debugfs_regset32 regset;
> +	struct debugfs_reg32 regs[9];
> +#endif
> +};
> +
> +struct mgb4_vin_dev *mgb4_vin_create(struct mgb4_dev *mgbdev, int id);
> +void mgb4_vin_free(struct mgb4_vin_dev *vindev);
> +
> +#endif
> diff --git a/drivers/media/pci/mgb4/mgb4_vout.c b/drivers/media/pci/mgb4/mgb4_vout.c
> new file mode 100644
> index 000000000000..718a400db310
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_vout.c
> @@ -0,0 +1,594 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + *
> + * This is the v4l2 output device module. It initializes the signal serializers
> + * and creates the v4l2 video devices.
> + *
> + * When the device is in loopback mode (a direct, in HW, in->out frame passing
> + * mode) we disable the v4l2 output by returning EBUSY in the open() syscall.
> + */
> +
> +#include <linux/pci.h>
> +#include <linux/align.h>
> +#include <linux/dma/amd_xdma.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/videobuf2-v4l2.h>
> +#include <media/videobuf2-dma-sg.h>
> +#include "mgb4_core.h"
> +#include "mgb4_dma.h"
> +#include "mgb4_sysfs.h"
> +#include "mgb4_io.h"
> +#include "mgb4_cmt.h"
> +#include "mgb4_vout.h"
> +
> +static const struct mgb4_vout_config vout_cfg[] = {
> +	{0, 0, 8, {0x78, 0x60, 0x64, 0x68, 0x74, 0x6C, 0x70, 0x7c}},
> +	{1, 1, 9, {0x98, 0x80, 0x84, 0x88, 0x94, 0x8c, 0x90, 0x9c}}
> +};
> +
> +static const struct i2c_board_info fpdl3_ser_info[] = {
> +	{I2C_BOARD_INFO("serializer1", 0x14)},
> +	{I2C_BOARD_INFO("serializer2", 0x16)},
> +};
> +
> +static const struct mgb4_i2c_kv fpdl3_i2c[] = {
> +	{0x05, 0xFF, 0x04}, {0x06, 0xFF, 0x01}, {0xC2, 0xFF, 0x80}
> +};
> +
> +static void return_all_buffers(struct mgb4_vout_dev *voutdev,
> +			       enum vb2_buffer_state state)
> +{
> +	struct mgb4_frame_buffer *buf, *node;
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&voutdev->qlock, flags);
> +	list_for_each_entry_safe(buf, node, &voutdev->buf_list, list) {
> +		vb2_buffer_done(&buf->vb.vb2_buf, state);
> +		list_del(&buf->list);
> +	}
> +	spin_unlock_irqrestore(&voutdev->qlock, flags);
> +}
> +
> +static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
> +		       unsigned int *nplanes, unsigned int sizes[],
> +		       struct device *alloc_devs[])
> +{
> +	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(q);
> +	unsigned int size;
> +
> +	size = (voutdev->width + voutdev->padding) * voutdev->height * 4;
> +
> +	if (*nplanes)
> +		return sizes[0] < size ? -EINVAL : 0;
> +	*nplanes = 1;
> +	sizes[0] = size;
> +
> +	return 0;
> +}
> +
> +static int buffer_init(struct vb2_buffer *vb)
> +{
> +	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
> +
> +	INIT_LIST_HEAD(&buf->list);
> +
> +	return 0;
> +}
> +
> +static int buffer_prepare(struct vb2_buffer *vb)
> +{
> +	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vb->vb2_queue);
> +	struct device *dev = &voutdev->mgbdev->pdev->dev;
> +	unsigned int size;
> +
> +	size = (voutdev->width * voutdev->padding) * voutdev->height * 4;
> +
> +	if (vb2_plane_size(vb, 0) < size) {
> +		dev_err(dev, "buffer too small (%lu < %u)\n",
> +			vb2_plane_size(vb, 0), size);
> +		return -EINVAL;
> +	}
> +
> +	vb2_set_plane_payload(vb, 0, size);
> +
> +	return 0;
> +}
> +
> +static void buffer_queue(struct vb2_buffer *vb)
> +{
> +	struct mgb4_vout_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
> +	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> +	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&vindev->qlock, flags);
> +	list_add_tail(&buf->list, &vindev->buf_list);
> +	spin_unlock_irqrestore(&vindev->qlock, flags);
> +}
> +
> +static void stop_streaming(struct vb2_queue *vq)
> +{
> +	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
> +	struct mgb4_dev *mgbdev = voutdev->mgbdev;
> +	int irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
> +
> +	xdma_disable_user_irq(mgbdev->xdev, irq);
> +	cancel_work_sync(&voutdev->dma_work);
> +	mgb4_mask_reg(&mgbdev->video, voutdev->config->regs.config, 0x2, 0x0);
> +	return_all_buffers(voutdev, VB2_BUF_STATE_ERROR);
> +}
> +
> +static int start_streaming(struct vb2_queue *vq, unsigned int count)
> +{
> +	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
> +	struct mgb4_dev *mgbdev = voutdev->mgbdev;
> +	struct device *dev = &mgbdev->pdev->dev;
> +	struct mgb4_frame_buffer *buf;
> +	struct mgb4_regs *video = &mgbdev->video;
> +	const struct mgb4_vout_config *config = voutdev->config;
> +	int irq = xdma_get_user_irq(mgbdev->xdev, config->irq);
> +	int rv;
> +	u32 addr;
> +
> +	mgb4_mask_reg(video, config->regs.config, 0x2, 0x2);
> +
> +	addr = mgb4_read_reg(video, config->regs.address);
> +	if (addr >= MGB4_ERR_QUEUE_FULL) {
> +		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
> +		return_all_buffers(voutdev, VB2_BUF_STATE_QUEUED);
> +		return -EBUSY;
> +	}
> +
> +	buf = list_first_entry(&voutdev->buf_list, struct mgb4_frame_buffer,
> +			       list);
> +	list_del_init(voutdev->buf_list.next);
> +
> +	rv = mgb4_dma_transfer(mgbdev, config->dma_channel, true, addr,
> +			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
> +	if (rv < 0) {
> +		dev_warn(dev, "DMA transfer error\n");
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> +	} else {
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
> +	}
> +
> +	xdma_enable_user_irq(mgbdev->xdev, irq);
> +
> +	return 0;
> +}
> +
> +static const struct vb2_ops queue_ops = {
> +	.queue_setup = queue_setup,
> +	.buf_init = buffer_init,
> +	.buf_prepare = buffer_prepare,
> +	.buf_queue = buffer_queue,
> +	.start_streaming = start_streaming,
> +	.stop_streaming = stop_streaming,
> +	.wait_prepare = vb2_ops_wait_prepare,
> +	.wait_finish = vb2_ops_wait_finish
> +};
> +
> +static int vidioc_querycap(struct file *file, void *priv,
> +			   struct v4l2_capability *cap)
> +{
> +	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
> +	strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
> +
> +	return 0;
> +}
> +
> +static int vidioc_enum_fmt(struct file *file, void *priv,
> +			   struct v4l2_fmtdesc *f)
> +{
> +	if (f->index != 0)
> +		return -EINVAL;
> +
> +	f->pixelformat = V4L2_PIX_FMT_ABGR32;
> +
> +	return 0;
> +}
> +
> +static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vout_dev *voutdev = video_drvdata(file);
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = voutdev->width;
> +	f->fmt.pix.height = voutdev->height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = (f->fmt.pix.width + voutdev->padding) * 4;
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
> +
> +	return 0;
> +}
> +
> +static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vout_dev *voutdev = video_drvdata(file);
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +
> +	if (vb2_is_busy(&voutdev->queue))
> +		return -EBUSY;
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = voutdev->width;
> +	f->fmt.pix.height = voutdev->height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
> +				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;

s_fmt can call try_fmt to handle most of the calculations.

> +
> +	voutdev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width * 4)) / 4;
> +	mgb4_write_reg(video, voutdev->config->regs.padding, voutdev->padding);
> +
> +	return 0;
> +}
> +
> +static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
> +{
> +	struct mgb4_vout_dev *voutdev = video_drvdata(file);
> +
> +	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
> +	f->fmt.pix.width = voutdev->width;
> +	f->fmt.pix.height = voutdev->height;
> +	f->fmt.pix.field = V4L2_FIELD_NONE;
> +	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
> +	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
> +				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
> +	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
> +
> +	return 0;
> +}
> +
> +static int vidioc_g_output(struct file *file, void *priv, unsigned int *i)
> +{
> +	*i = 0;
> +	return 0;
> +}
> +
> +static int vidioc_s_output(struct file *file, void *priv, unsigned int i)
> +{
> +	return i ? -EINVAL : 0;
> +}
> +
> +static int vidioc_enum_output(struct file *file, void *priv,
> +			      struct v4l2_output *out)
> +{
> +	if (out->index != 0)
> +		return -EINVAL;
> +
> +	out->type = V4L2_OUTPUT_TYPE_ANALOG;
> +	strscpy(out->name, "MGB4", sizeof(out->name));
> +
> +	return 0;
> +}
> +
> +static const struct v4l2_ioctl_ops video_ioctl_ops = {
> +	.vidioc_querycap = vidioc_querycap,
> +	.vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
> +	.vidioc_try_fmt_vid_out = vidioc_try_fmt,
> +	.vidioc_s_fmt_vid_out = vidioc_s_fmt,
> +	.vidioc_g_fmt_vid_out = vidioc_g_fmt,
> +	.vidioc_enum_output = vidioc_enum_output,
> +	.vidioc_g_output = vidioc_g_output,
> +	.vidioc_s_output = vidioc_s_output,
> +	.vidioc_reqbufs = vb2_ioctl_reqbufs,
> +	.vidioc_create_bufs = vb2_ioctl_create_bufs,
> +	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
> +	.vidioc_querybuf = vb2_ioctl_querybuf,
> +	.vidioc_qbuf = vb2_ioctl_qbuf,
> +	.vidioc_dqbuf = vb2_ioctl_dqbuf,
> +	.vidioc_expbuf = vb2_ioctl_expbuf,
> +	.vidioc_streamon = vb2_ioctl_streamon,
> +	.vidioc_streamoff = vb2_ioctl_streamoff,
> +};
> +
> +static int fh_open(struct file *file)
> +{
> +	struct mgb4_vout_dev *voutdev = video_drvdata(file);
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +	struct device *dev = &voutdev->mgbdev->pdev->dev;
> +	u32 config, resolution;
> +	int rv;
> +
> +	/* Return EBUSY when the device is in loopback mode */
> +	config = mgb4_read_reg(video, voutdev->config->regs.config);
> +	if ((config & 0xc) >> 2 != voutdev->config->id + MGB4_VIN_DEVICES) {
> +		dev_dbg(dev, "can not open - device in loopback mode");
> +		return -EBUSY;
> +	}
> +
> +	mutex_lock(&voutdev->lock);
> +
> +	rv = v4l2_fh_open(file);
> +	if (rv)
> +		goto out;
> +
> +	if (!v4l2_fh_is_singular_file(file))
> +		goto out;
> +
> +	resolution = mgb4_read_reg(video, voutdev->config->regs.resolution);
> +	voutdev->width = resolution >> 16;
> +	voutdev->height = resolution & 0xFFFF;
> +
> +out:
> +	mutex_unlock(&voutdev->lock);
> +	return rv;
> +}
> +
> +static const struct v4l2_file_operations video_fops = {
> +	.owner = THIS_MODULE,
> +	.open = fh_open,
> +	.release = vb2_fop_release,
> +	.unlocked_ioctl = video_ioctl2,
> +	.write = vb2_fop_write,
> +	.mmap = vb2_fop_mmap,
> +	.poll = vb2_fop_poll,
> +};
> +
> +static void dma_transfer(struct work_struct *work)
> +{
> +	struct mgb4_vout_dev *voutdev = container_of(work, struct mgb4_vout_dev,
> +						     dma_work);
> +	struct device *dev = &voutdev->mgbdev->pdev->dev;
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +	struct mgb4_frame_buffer *buf = 0;
> +	unsigned long flags;
> +	u32 addr;
> +	int rv;
> +
> +	spin_lock_irqsave(&voutdev->qlock, flags);
> +	if (!list_empty(&voutdev->buf_list)) {
> +		buf = list_first_entry(&voutdev->buf_list,
> +				       struct mgb4_frame_buffer, list);
> +		list_del_init(voutdev->buf_list.next);
> +	}
> +	spin_unlock_irqrestore(&voutdev->qlock, flags);
> +
> +	if (!buf)
> +		return;
> +
> +	addr = mgb4_read_reg(video, voutdev->config->regs.address);
> +	if (addr >= MGB4_ERR_QUEUE_FULL) {
> +		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> +		return;
> +	}
> +
> +	rv = mgb4_dma_transfer(voutdev->mgbdev, voutdev->config->dma_channel,
> +			       true, addr,
> +			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
> +	if (rv < 0) {
> +		dev_warn(dev, "DMA transfer error\n");
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
> +	} else {
> +		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
> +	}
> +}
> +
> +static irqreturn_t handler(int irq, void *ctx)
> +{
> +	struct mgb4_vout_dev *voutdev = (struct mgb4_vout_dev *)ctx;
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +
> +	schedule_work(&voutdev->dma_work);
> +
> +	mgb4_write_reg(video, 0xB4, 1U << voutdev->config->irq);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static int ser_init(struct mgb4_vout_dev *voutdev, int id)
> +{
> +	int rv;
> +	const struct i2c_board_info *info = &fpdl3_ser_info[id];
> +	struct mgb4_i2c_client *ser = &voutdev->ser;
> +	struct device *dev = &voutdev->mgbdev->pdev->dev;
> +
> +	if (MGB4_IS_GMSL(voutdev->mgbdev))
> +		return 0;
> +
> +	rv = mgb4_i2c_init(ser, voutdev->mgbdev->i2c_adap, info, 8);
> +	if (rv < 0) {
> +		dev_err(dev, "failed to create serializer\n");
> +		return rv;
> +	}
> +	rv = mgb4_i2c_configure(ser, fpdl3_i2c, ARRAY_SIZE(fpdl3_i2c));
> +	if (rv < 0) {
> +		dev_err(dev, "failed to configure serializer\n");
> +		goto err_i2c_dev;
> +	}
> +
> +	return 0;
> +
> +err_i2c_dev:
> +	mgb4_i2c_free(ser);
> +
> +	return rv;
> +}
> +
> +static void fpga_init(struct mgb4_vout_dev *voutdev)
> +{
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +	const struct mgb4_vout_regs *regs = &voutdev->config->regs;
> +
> +	mgb4_write_reg(video, regs->config, 0x00000011);
> +	mgb4_write_reg(video, regs->resolution,
> +		       (MGB4_DEFAULT_WIDTH << 16) | MGB4_DEFAULT_HEIGHT);
> +	mgb4_write_reg(video, regs->hsync, 0x00102020);
> +	mgb4_write_reg(video, regs->vsync, 0x40020202);
> +	mgb4_write_reg(video, regs->frame_period, MGB4_DEFAULT_PERIOD);
> +	mgb4_write_reg(video, regs->padding, 0x00000000);
> +
> +	voutdev->freq = mgb4_cmt_set_vout_freq(voutdev, 70000 >> 1) << 1;
> +
> +	mgb4_write_reg(video, regs->config,
> +		       (voutdev->config->id + MGB4_VIN_DEVICES) << 2 | 1 << 4);
> +}
> +
> +#ifdef CONFIG_DEBUG_FS
> +static void debugfs_init(struct mgb4_vout_dev *voutdev)
> +{
> +	struct mgb4_regs *video = &voutdev->mgbdev->video;
> +
> +	voutdev->debugfs = debugfs_create_dir(voutdev->vdev.name,
> +					      voutdev->mgbdev->debugfs);
> +	if (!voutdev->debugfs)
> +		return;
> +
> +	voutdev->regs[0].name = "CONFIG";
> +	voutdev->regs[0].offset = voutdev->config->regs.config;
> +	voutdev->regs[1].name = "STATUS";
> +	voutdev->regs[1].offset = voutdev->config->regs.status;
> +	voutdev->regs[2].name = "RESOLUTION";
> +	voutdev->regs[2].offset = voutdev->config->regs.resolution;
> +	voutdev->regs[3].name = "VIDEO_PARAMS_1";
> +	voutdev->regs[3].offset = voutdev->config->regs.hsync;
> +	voutdev->regs[4].name = "VIDEO_PARAMS_2";
> +	voutdev->regs[4].offset = voutdev->config->regs.vsync;
> +	voutdev->regs[5].name = "FRAME_PERIOD";
> +	voutdev->regs[5].offset = voutdev->config->regs.frame_period;
> +	voutdev->regs[6].name = "PADDING";
> +	voutdev->regs[6].offset = voutdev->config->regs.padding;
> +
> +	voutdev->regset.base = video->membase;
> +	voutdev->regset.regs = voutdev->regs;
> +	voutdev->regset.nregs = ARRAY_SIZE(voutdev->regs);
> +
> +	debugfs_create_regset32("registers", 0444, voutdev->debugfs,
> +				&voutdev->regset);
> +}
> +#endif
> +
> +struct mgb4_vout_dev *mgb4_vout_create(struct mgb4_dev *mgbdev, int id)
> +{
> +	int rv, irq;
> +	struct device_attribute **attr, **module_attr;
> +	struct mgb4_vout_dev *voutdev;
> +	struct mgb4_regs *video;
> +	struct pci_dev *pdev = mgbdev->pdev;
> +	struct device *dev = &pdev->dev;
> +
> +	voutdev = kzalloc(sizeof(*voutdev), GFP_KERNEL);
> +	if (!voutdev)
> +		return NULL;
> +
> +	voutdev->mgbdev = mgbdev;
> +	voutdev->config = &vout_cfg[id];
> +	video = &voutdev->mgbdev->video;
> +
> +	/* Frame queue */
> +	INIT_LIST_HEAD(&voutdev->buf_list);
> +	spin_lock_init(&voutdev->qlock);
> +
> +	/* DMA transfer stuff */
> +	INIT_WORK(&voutdev->dma_work, dma_transfer);
> +
> +	/* IRQ callback */
> +	irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
> +	rv = request_irq(irq, handler, 0, "mgb4-vout", voutdev);
> +	if (rv) {
> +		dev_err(dev, "failed to register irq handler\n");
> +		goto err_alloc;
> +	}
> +
> +	/* Set the FPGA registers default values */
> +	fpga_init(voutdev);
> +
> +	/* Set the serializer default values */
> +	rv = ser_init(voutdev, id);
> +	if (rv)
> +		goto err_irq;
> +
> +	/* V4L2 stuff init  */
> +	rv = v4l2_device_register(dev, &voutdev->v4l2dev);
> +	if (rv) {
> +		dev_err(dev, "failed to register v4l2 device\n");
> +		goto err_irq;
> +	}
> +
> +	mutex_init(&voutdev->lock);
> +
> +	voutdev->queue.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
> +	voutdev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
> +	voutdev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
> +	voutdev->queue.ops = &queue_ops;
> +	voutdev->queue.mem_ops = &vb2_dma_sg_memops;
> +	voutdev->queue.gfp_flags = GFP_DMA32;
> +	voutdev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> +	voutdev->queue.min_buffers_needed = 2;
> +	voutdev->queue.drv_priv = voutdev;
> +	voutdev->queue.lock = &voutdev->lock;
> +	voutdev->queue.dev = dev;
> +	rv = vb2_queue_init(&voutdev->queue);
> +	if (rv) {
> +		dev_err(dev, "failed to initialize vb2 queue\n");
> +		goto err_v4l2_dev;
> +	}
> +
> +	snprintf(voutdev->vdev.name, sizeof(voutdev->vdev.name), "mgb4-out%d",
> +		 id + 1);
> +	voutdev->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE
> +	  | V4L2_CAP_STREAMING;
> +	voutdev->vdev.vfl_dir = VFL_DIR_TX;
> +	voutdev->vdev.fops = &video_fops;
> +	voutdev->vdev.ioctl_ops = &video_ioctl_ops;
> +	voutdev->vdev.release = video_device_release_empty;
> +	voutdev->vdev.v4l2_dev = &voutdev->v4l2dev;
> +	voutdev->vdev.lock = &voutdev->lock;
> +	voutdev->vdev.queue = &voutdev->queue;
> +	video_set_drvdata(&voutdev->vdev, voutdev);
> +
> +	rv = video_register_device(&voutdev->vdev, VFL_TYPE_VIDEO, -1);
> +	if (rv) {
> +		dev_err(dev, "failed to register video device\n");
> +		goto err_v4l2_dev;
> +	}
> +
> +	/* Module sysfs attributes */
> +	module_attr = MGB4_IS_GMSL(mgbdev)
> +	  ? mgb4_gmsl_out_attrs : mgb4_fpdl3_out_attrs;
> +	for (attr = module_attr; *attr; attr++)
> +		device_create_file(&voutdev->vdev.dev, *attr);
> +
> +#ifdef CONFIG_DEBUG_FS
> +	debugfs_init(voutdev);
> +#endif
> +
> +	return voutdev;
> +
> +err_v4l2_dev:
> +	v4l2_device_unregister(&voutdev->v4l2dev);
> +err_irq:
> +	free_irq(irq, voutdev);
> +err_alloc:
> +	kfree(voutdev);
> +
> +	return NULL;
> +}
> +
> +void mgb4_vout_free(struct mgb4_vout_dev *voutdev)
> +{
> +	struct device_attribute **attr, **module_attr;
> +	int irq = xdma_get_user_irq(voutdev->mgbdev->xdev, voutdev->config->irq);
> +
> +	free_irq(irq, voutdev);
> +
> +	debugfs_remove_recursive(voutdev->debugfs);
> +
> +	module_attr = MGB4_IS_GMSL(voutdev->mgbdev)
> +	  ? mgb4_gmsl_out_attrs : mgb4_fpdl3_out_attrs;
> +	for (attr = module_attr; *attr; attr++)
> +		device_remove_file(&voutdev->vdev.dev, *attr);
> +
> +	mgb4_i2c_free(&voutdev->ser);
> +	video_unregister_device(&voutdev->vdev);
> +	v4l2_device_unregister(&voutdev->v4l2dev);
> +
> +	kfree(voutdev);
> +}
> diff --git a/drivers/media/pci/mgb4/mgb4_vout.h b/drivers/media/pci/mgb4/mgb4_vout.h
> new file mode 100644
> index 000000000000..b163dee711fd
> --- /dev/null
> +++ b/drivers/media/pci/mgb4/mgb4_vout.h
> @@ -0,0 +1,65 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) 2021-2023 Digiteq Automotive
> + *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
> + */
> +
> +#ifndef __MGB4_VOUT_H__
> +#define __MGB4_VOUT_H__
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-dev.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/videobuf2-core.h>
> +#include <linux/debugfs.h>
> +#include "mgb4_i2c.h"
> +
> +struct mgb4_vout_regs {
> +	u32 address;
> +	u32 config;
> +	u32 status;
> +	u32 resolution;
> +	u32 frame_period;
> +	u32 hsync;
> +	u32 vsync;
> +	u32 padding;
> +};
> +
> +struct mgb4_vout_config {
> +	int id;
> +	int dma_channel;
> +	int irq;
> +	struct mgb4_vout_regs regs;
> +};
> +
> +struct mgb4_vout_dev {
> +	struct mgb4_dev *mgbdev;
> +	struct v4l2_device v4l2dev;
> +	struct video_device vdev;
> +	struct vb2_queue queue;
> +	struct mutex lock; /* vdev lock */
> +
> +	spinlock_t qlock; /* buffer queue lock */
> +	struct list_head buf_list;
> +	struct work_struct dma_work;
> +
> +	u32 width;
> +	u32 height;
> +	u32 freq;
> +	u32 padding;
> +
> +	struct mgb4_i2c_client ser;
> +
> +	const struct mgb4_vout_config *config;
> +
> +#ifdef CONFIG_DEBUG_FS
> +	struct dentry *debugfs;
> +	struct debugfs_regset32 regset;
> +	struct debugfs_reg32 regs[7];
> +#endif
> +};
> +
> +struct mgb4_vout_dev *mgb4_vout_create(struct mgb4_dev *mgbdev, int id);
> +void mgb4_vout_free(struct mgb4_vout_dev *voutdev);
> +
> +#endif

Regards,

	Hans
Hans Verkuil July 26, 2023, 10:19 a.m. UTC | #4
On 26/07/2023 12:08, Hans Verkuil wrote:
> On 04/07/2023 15:13, tumic@gpxsee.org wrote:
>> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
>>
>> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
>> video interfaces. As for now, two modules - FPD-Link and GMSL - are
>> available and supported by the driver. The card has two inputs and two
>> outputs (FPD-Link only).
>>
>> In addition to the video interfaces it also provides a trigger signal
>> interface and a MTD interface for FPGA firmware upload.
>>
>> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
>> ---
>>  MAINTAINERS                             |   7 +
>>  drivers/media/pci/Kconfig               |   1 +
>>  drivers/media/pci/Makefile              |   1 +
>>  drivers/media/pci/mgb4/Kconfig          |  17 +
>>  drivers/media/pci/mgb4/Makefile         |   6 +
>>  drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>>  drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>>  drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>>  drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>>  drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>>  drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>>  drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>>  drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>>  drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>>  drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>>  drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>>  drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>>  drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>>  drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>>  drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>>  drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>>  drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>>  26 files changed, 4910 insertions(+)
>>  create mode 100644 drivers/media/pci/mgb4/Kconfig
>>  create mode 100644 drivers/media/pci/mgb4/Makefile
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>>

<snip>

>> +
>> +	/* Register the video device */
>> +	rv = video_register_device(&vindev->vdev, VFL_TYPE_VIDEO, -1);
>> +	if (rv) {
>> +		dev_err(dev, "failed to register video device\n");
>> +		goto err_v4l2_dev;
>> +	}
>> +
>> +	/* Module sysfs attributes */
>> +	module_attr = MGB4_IS_GMSL(mgbdev)
>> +	  ? mgb4_gmsl_in_attrs : mgb4_fpdl3_in_attrs;
>> +	for (attr = module_attr; *attr; attr++)
>> +		device_create_file(&vindev->vdev.dev, *attr);
> 
> I believe this can be simplified by using ATTRIBUTE_GROUPS and the
> dev_groups field in the struct pci_driver. This will then be automatically
> created and removed.

While this is true for the global PCI attrs, for the per-video device
attrs there is no dev_groups. However, you can still call device_add_groups
and device_remove_groups instead of device_create_file, AFAICT.

That should be a lot easier. Note that you do need to check the error code:
if it fails, then the probe() should fail as well.

Regards,

	Hans

> 
>> +
>> +#ifdef CONFIG_DEBUG_FS
>> +	debugfs_init(vindev);
>> +#endif
>> +
>> +	return vindev;
>> +
>> +err_v4l2_dev:
>> +	v4l2_device_unregister(&vindev->v4l2dev);
>> +err_err_irq:
>> +	free_irq(err_irq, vindev);
>> +err_vin_irq:
>> +	free_irq(vin_irq, vindev);
>> +err_alloc:
>> +	kfree(vindev);
>> +
>> +	return NULL;
>> +}
Martin Tůma July 27, 2023, 7:55 p.m. UTC | #5
On 26. 07. 23 11:30, Hans Verkuil wrote:
> On 26/07/2023 11:14, Hans Verkuil wrote:
>> Hi Martin,
>>
>> On 04/07/2023 15:13, tumic@gpxsee.org wrote:
>>> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
>>>
>>> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
>>> video interfaces. As for now, two modules - FPD-Link and GMSL - are
>>> available and supported by the driver. The card has two inputs and two
>>> outputs (FPD-Link only).
>>>
>>> In addition to the video interfaces it also provides a trigger signal
>>> interface and a MTD interface for FPGA firmware upload.
>>>
>>> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
>>> ---
>>>   MAINTAINERS                             |   7 +
>>>   drivers/media/pci/Kconfig               |   1 +
>>>   drivers/media/pci/Makefile              |   1 +
>>>   drivers/media/pci/mgb4/Kconfig          |  17 +
>>>   drivers/media/pci/mgb4/Makefile         |   6 +
>>>   drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>>>   drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>>>   drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>>>   drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>>>   drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>>>   drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>>>   drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>>>   drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>>>   drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>>>   drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>>>   drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>>>   drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>>>   drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>>>   drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>>>   drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>>>   drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>>>   drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>>>   drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>>>   drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>>>   drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>>>   drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>>>   26 files changed, 4910 insertions(+)
>>>   create mode 100644 drivers/media/pci/mgb4/Kconfig
>>>   create mode 100644 drivers/media/pci/mgb4/Makefile
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>>>
>>
>> When I build with: make W=1 KCFLAGS=-Wmaybe-uninitialized
>>
>> I get this warning:
>>
>> drivers/media/pci/mgb4/mgb4_vout.c: In function 'mgb4_vout_create':
>> drivers/media/pci/mgb4/mgb4_vout.c:473:27: warning: variable 'video' set but not used [-Wunused-but-set-variable]
>>    473 |         struct mgb4_regs *video;
>>        |                           ^~~~~
> 
> checkpatch.pl --strict also gives a lot of warnings.
> 
> You can ignore the "line length of 131 exceeds 100 columns" warnings for the hex dump.
> Those are OK in that particular case.
> 
> But the suggested renamings would be good to implement to be consistent with other
> drivers.
> 
> Regarding these:
> 
> WARNING: Missing a blank line after declarations
> #3340: FILE: drivers/media/pci/mgb4/mgb4_trigger.c:93:
> +               u32 data;
> +               s64 ts __aligned(8);
> 
> WARNING: externs should be avoided in .c files
> #3340: FILE: drivers/media/pci/mgb4/mgb4_trigger.c:93:
> +               s64 ts __aligned(8);
> 
> This seems to be standard iio coding style, even though checkpatch
> gets confused by this. So let's leave this as-is.
> 
> Regards,
> 
> 	Hans

Hi Hans,
I'm out of office till next week so I'm not able to re-check it now, but 
there were generally three kinds of warnings from checkpatch:

1.) line lengths in the tables
2.) the iio code style
3.) the rename suggestions

I'm glad you have no problem with 1 and 2 as the current implementation 
makes IMHO more sense than following some strict automatic rules. The 
renaming makes not much sense either for me, but I can rename the 
functions if required. I will have a look at it when I'm back at work.

M.
Martin Tůma July 27, 2023, 7:58 p.m. UTC | #6
On 26. 07. 23 11:14, Hans Verkuil wrote:
> Hi Martin,
> 
> On 04/07/2023 15:13, tumic@gpxsee.org wrote:
>> From: Martin Tůma <martin.tuma@digiteqautomotive.com>
>>
>> Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
>> video interfaces. As for now, two modules - FPD-Link and GMSL - are
>> available and supported by the driver. The card has two inputs and two
>> outputs (FPD-Link only).
>>
>> In addition to the video interfaces it also provides a trigger signal
>> interface and a MTD interface for FPGA firmware upload.
>>
>> Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
>> ---
>>   MAINTAINERS                             |   7 +
>>   drivers/media/pci/Kconfig               |   1 +
>>   drivers/media/pci/Makefile              |   1 +
>>   drivers/media/pci/mgb4/Kconfig          |  17 +
>>   drivers/media/pci/mgb4/Makefile         |   6 +
>>   drivers/media/pci/mgb4/mgb4_cmt.c       | 244 +++++++
>>   drivers/media/pci/mgb4/mgb4_cmt.h       |  17 +
>>   drivers/media/pci/mgb4/mgb4_core.c      | 711 ++++++++++++++++++
>>   drivers/media/pci/mgb4/mgb4_core.h      |  72 ++
>>   drivers/media/pci/mgb4/mgb4_dma.c       | 123 ++++
>>   drivers/media/pci/mgb4/mgb4_dma.h       |  18 +
>>   drivers/media/pci/mgb4/mgb4_i2c.c       | 140 ++++
>>   drivers/media/pci/mgb4/mgb4_i2c.h       |  35 +
>>   drivers/media/pci/mgb4/mgb4_io.h        |  33 +
>>   drivers/media/pci/mgb4/mgb4_regs.c      |  30 +
>>   drivers/media/pci/mgb4/mgb4_regs.h      |  35 +
>>   drivers/media/pci/mgb4/mgb4_sysfs.h     |  18 +
>>   drivers/media/pci/mgb4/mgb4_sysfs_in.c  | 757 +++++++++++++++++++
>>   drivers/media/pci/mgb4/mgb4_sysfs_out.c | 700 ++++++++++++++++++
>>   drivers/media/pci/mgb4/mgb4_sysfs_pci.c |  71 ++
>>   drivers/media/pci/mgb4/mgb4_trigger.c   | 208 ++++++
>>   drivers/media/pci/mgb4/mgb4_trigger.h   |   8 +
>>   drivers/media/pci/mgb4/mgb4_vin.c       | 930 ++++++++++++++++++++++++
>>   drivers/media/pci/mgb4/mgb4_vin.h       |  69 ++
>>   drivers/media/pci/mgb4/mgb4_vout.c      | 594 +++++++++++++++
>>   drivers/media/pci/mgb4/mgb4_vout.h      |  65 ++
>>   26 files changed, 4910 insertions(+)
>>   create mode 100644 drivers/media/pci/mgb4/Kconfig
>>   create mode 100644 drivers/media/pci/mgb4/Makefile
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>>   create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>>
> 
> When I build with: make W=1 KCFLAGS=-Wmaybe-uninitialized
> 
> I get this warning:
> 
> drivers/media/pci/mgb4/mgb4_vout.c: In function 'mgb4_vout_create':
> drivers/media/pci/mgb4/mgb4_vout.c:473:27: warning: variable 'video' set but not used [-Wunused-but-set-variable]
>    473 |         struct mgb4_regs *video;
>        |                           ^~~~~
> 
> Regards,
> 
> 	Hans

Hi,
Thanks for pointing this out. I was making some minor code cleanup when 
creating the v8 patch and probably missed that. I will fix it in v9.

M.
diff mbox series

Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index bc201627c2e0..8ac4b4d6e8ca 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6050,6 +6050,13 @@  L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	drivers/gpio/gpio-gpio-mm.c
 
+DIGITEQ AUTOMOTIVE MGB4 V4L2 DRIVER
+M:	Martin Tuma <martin.tuma@digiteqautomotive.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	Documentation/admin-guide/media/mgb4.rst
+F:	drivers/media/pci/mgb4/
+
 DIOLAN U2C-12 I2C DRIVER
 M:	Guenter Roeck <linux@roeck-us.net>
 L:	linux-i2c@vger.kernel.org
diff --git a/drivers/media/pci/Kconfig b/drivers/media/pci/Kconfig
index 480194543d05..28cea9675d71 100644
--- a/drivers/media/pci/Kconfig
+++ b/drivers/media/pci/Kconfig
@@ -13,6 +13,7 @@  if MEDIA_PCI_SUPPORT
 if MEDIA_CAMERA_SUPPORT
 	comment "Media capture support"
 
+source "drivers/media/pci/mgb4/Kconfig"
 source "drivers/media/pci/solo6x10/Kconfig"
 source "drivers/media/pci/sta2x11/Kconfig"
 source "drivers/media/pci/tw5864/Kconfig"
diff --git a/drivers/media/pci/Makefile b/drivers/media/pci/Makefile
index 8bed619b7130..f18c7e15abe3 100644
--- a/drivers/media/pci/Makefile
+++ b/drivers/media/pci/Makefile
@@ -32,6 +32,7 @@  obj-$(CONFIG_VIDEO_CX25821) += cx25821/
 obj-$(CONFIG_VIDEO_CX88) += cx88/
 obj-$(CONFIG_VIDEO_DT3155) += dt3155/
 obj-$(CONFIG_VIDEO_IVTV) += ivtv/
+obj-$(CONFIG_VIDEO_MGB4) += mgb4/
 obj-$(CONFIG_VIDEO_SAA7134) += saa7134/
 obj-$(CONFIG_VIDEO_SAA7164) += saa7164/
 obj-$(CONFIG_VIDEO_SOLO6X10) += solo6x10/
diff --git a/drivers/media/pci/mgb4/Kconfig b/drivers/media/pci/mgb4/Kconfig
new file mode 100644
index 000000000000..13fad15a434c
--- /dev/null
+++ b/drivers/media/pci/mgb4/Kconfig
@@ -0,0 +1,17 @@ 
+# SPDX-License-Identifier: GPL-2.0-only
+config VIDEO_MGB4
+	tristate "Digiteq Automotive MGB4 support"
+	depends on VIDEO_DEV && PCI && I2C && DMADEVICES && SPI && MTD && IIO
+	select VIDEOBUF2_DMA_SG
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
+	select I2C_XILINX
+	select SPI_XILINX
+	select MTD_SPI_NOR
+	select XILINX_XDMA
+	help
+	  This is a video4linux driver for Digiteq Automotive MGB4 grabber
+	  cards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mgb4.
diff --git a/drivers/media/pci/mgb4/Makefile b/drivers/media/pci/mgb4/Makefile
new file mode 100644
index 000000000000..e92ead18bed0
--- /dev/null
+++ b/drivers/media/pci/mgb4/Makefile
@@ -0,0 +1,6 @@ 
+# SPDX-License-Identifier: GPL-2.0
+mgb4-objs	:= mgb4_regs.o mgb4_core.o mgb4_vin.o mgb4_vout.o \
+               mgb4_sysfs_pci.o mgb4_sysfs_in.o mgb4_sysfs_out.o \
+               mgb4_i2c.o mgb4_cmt.o mgb4_trigger.o mgb4_dma.o
+
+obj-$(CONFIG_VIDEO_MGB4) += mgb4.o
diff --git a/drivers/media/pci/mgb4/mgb4_cmt.c b/drivers/media/pci/mgb4/mgb4_cmt.c
new file mode 100644
index 000000000000..b8058da48b2d
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_cmt.c
@@ -0,0 +1,244 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * The CMT module configures the FPGA Clock Management Tile (CMT) registers. For
+ * different video signal frequencies (FPGA input signal frequencies), the FPGA
+ * CMT registers need to be adjusted for the FPGA to work properly. The values
+ * are precomputed based on formulas given by Xilinx in their FPGA documentation
+ * (which are in turn full of some magic values/tables...).
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include "mgb4_core.h"
+#include "mgb4_cmt.h"
+
+static const u16 cmt_vals_out[][15] = {
+	{0x1208, 0x0000, 0x171C, 0x0000, 0x1E38, 0x0000, 0x11C7, 0x0000, 0x1041, 0x01BC, 0x7C01, 0x7DE9, 0xFFFF, 0x9900, 0x8100, },
+	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x130D, 0x0080, 0x0041, 0x0090, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x9000, },
+	{0x11C7, 0x0000, 0x1619, 0x0080, 0x1C71, 0x0000, 0x165A, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
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+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x175E, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1492, 0x0000, 0x0042, 0x0013, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x179F, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0800, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1619, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1493, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x17DF, 0x0000, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x8800, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x130D, 0x0080, 0x0041, 0x0090, 0x7C01, 0x7DE9, 0xFFFF, 0x1100, 0x9000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x17E0, 0x0080, 0x0083, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x9000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x14D3, 0x0000, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x165A, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1000, 0x9000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x1820, 0x0000, 0x0083, 0x00FA, 0x7DE9, 0x7DE8, 0xFFFF, 0x0900, 0x9000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x14D4, 0x0080, 0x0042, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x0900, 0x1000, },
+	{0x1082, 0x0000, 0x11C7, 0x0000, 0x138E, 0x0000, 0x169B, 0x0080, 0x0082, 0x00FA, 0x7C01, 0x7DE9, 0xFFFF, 0x1800, 0x0100, },
+};
+
+static const u16 cmt_vals_in[][13] = {
+	{0x1082, 0x0000, 0x5104, 0x0000, 0x11C7, 0x0000, 0x1041, 0x02BC, 0x7C01, 0xFFE9, 0x9900, 0x9908, 0x8100},
+	{0x1104, 0x0000, 0x9208, 0x0000, 0x138E, 0x0000, 0x1041, 0x015E, 0x7C01, 0xFFE9, 0x0100, 0x0908, 0x1000},
+};
+
+static const u32 cmt_addrs_out[][15] = {
+	{0x420, 0x424, 0x428, 0x42C, 0x430, 0x434, 0x450, 0x454, 0x458, 0x460, 0x464, 0x468, 0x4A0, 0x538, 0x53C},
+	{0x620, 0x624, 0x628, 0x62C, 0x630, 0x634, 0x650, 0x654, 0x658, 0x660, 0x664, 0x668, 0x6A0, 0x738, 0x73C},
+};
+
+static const u32 cmt_addrs_in[][13] = {
+	{0x020, 0x024, 0x028, 0x02C, 0x050, 0x054, 0x058, 0x060, 0x064, 0x068, 0x0A0, 0x138, 0x13C},
+	{0x220, 0x224, 0x228, 0x22C, 0x250, 0x254, 0x258, 0x260, 0x264, 0x268, 0x2A0, 0x338, 0x33C},
+};
+
+static const u32 cmt_freq[] = {
+	25000, 25510, 26020, 26530, 26983, 27551, 28000, 28570,
+	29046, 29522, 30000, 30476, 30952, 31546, 32000, 32539,
+	33035, 33571, 33928, 34522, 35000, 35428, 36000, 36571,
+	36904, 37500, 38093, 38571, 39047, 39453, 40000, 40476,
+	40952, 41494, 41964, 42857, 43535, 44047, 44444, 45000,
+	45535, 46029, 46428, 46823, 47617, 48214, 48571, 49107,
+	49523, 50000, 50476, 50892, 51428, 52380, 53333, 53967,
+	54285, 55238, 55555, 55952, 57142, 58095, 58571, 59047,
+	59521, 60000, 60316, 60952, 61428, 61904, 62500, 63092,
+	63491, 64282, 65078, 65476, 66071, 66664, 67142, 67854,
+	68571, 69044, 69642, 70000, 71425, 72616, 73214, 73808,
+	74285, 75000, 75714, 76187, 76785, 77142, 78570, 80000,
+	80357, 80951, 81428, 82142, 82857, 83332, 83928, 84285,
+	85713, 87142, 87500, 88094, 88571, 89285, 90000, 90475,
+	91071, 91428, 92856, 94642,
+};
+
+static size_t freq_srch(u32 key, const u32 *array, size_t size)
+{
+	int l = 0;
+	int r = size - 1;
+	int m;
+
+	while (l <= r) {
+		m = (l + r) / 2;
+		if (array[m] < key)
+			l = m + 1;
+		else if (array[m] > key)
+			r = m - 1;
+		else
+			return m;
+	}
+
+	if (r < 0 || l > size - 1)
+		return m;
+	else
+		return (abs(key - array[l]) < abs(key - array[r])) ? l : r;
+}
+
+u32 mgb4_cmt_set_vout_freq(struct mgb4_vout_dev *voutdev, unsigned int freq)
+{
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+	const struct mgb4_vout_regs *regs = &voutdev->config->regs;
+	const u16 *reg_set;
+	const u32 *addr;
+	u32 config;
+	size_t i, index;
+
+	index = freq_srch(freq, cmt_freq, ARRAY_SIZE(cmt_freq));
+	addr = cmt_addrs_out[voutdev->config->id];
+	reg_set = cmt_vals_out[index];
+
+	config = mgb4_read_reg(video, regs->config);
+
+	mgb4_write_reg(video, regs->config, 0x1 | (config & ~0x3));
+
+	for (i = 0; i < ARRAY_SIZE(cmt_addrs_out[0]); i++)
+		mgb4_write_reg(&voutdev->mgbdev->cmt, addr[i], reg_set[i]);
+
+	mgb4_mask_reg(video, regs->config, 0x100, 0x100);
+	mgb4_mask_reg(video, regs->config, 0x100, 0x0);
+
+	mgb4_write_reg(video, regs->config, config & ~0x1);
+
+	return cmt_freq[index];
+}
+
+void mgb4_cmt_set_vin_freq_range(struct mgb4_vin_dev *vindev,
+				 unsigned int freq_range)
+{
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	const struct mgb4_vin_regs *regs = &vindev->config->regs;
+	const u16 *reg_set;
+	const u32 *addr;
+	u32 config;
+	size_t i;
+
+	addr = cmt_addrs_in[vindev->config->id];
+	reg_set = cmt_vals_in[freq_range];
+
+	config = mgb4_read_reg(video, regs->config);
+
+	mgb4_write_reg(video, regs->config, 0x1 | (config & ~0x3));
+
+	for (i = 0; i < ARRAY_SIZE(cmt_addrs_in[0]); i++)
+		mgb4_write_reg(&vindev->mgbdev->cmt, addr[i], reg_set[i]);
+
+	mgb4_mask_reg(video, regs->config, 0x1000, 0x1000);
+	mgb4_mask_reg(video, regs->config, 0x1000, 0x0);
+
+	mgb4_write_reg(video, regs->config, config & ~0x1);
+}
diff --git a/drivers/media/pci/mgb4/mgb4_cmt.h b/drivers/media/pci/mgb4/mgb4_cmt.h
new file mode 100644
index 000000000000..b15df56ca059
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_cmt.h
@@ -0,0 +1,17 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_CMT_H__
+#define __MGB4_CMT_H__
+
+#include "mgb4_vout.h"
+#include "mgb4_vin.h"
+
+u32 mgb4_cmt_set_vout_freq(struct mgb4_vout_dev *voutdev, unsigned int freq);
+void mgb4_cmt_set_vin_freq_range(struct mgb4_vin_dev *vindev,
+				 unsigned int freq_range);
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_core.c b/drivers/media/pci/mgb4/mgb4_core.c
new file mode 100644
index 000000000000..33ad447c1811
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_core.c
@@ -0,0 +1,711 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This is the driver for the MGB4 video grabber card by Digiteq Automotive.
+ *
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This is the main driver module. The DMA, I2C and SPI sub-drivers are
+ * initialized here and the input/output v4l2 devices are created.
+ *
+ * The mgb4 card uses different expansion modules for different video sources
+ * (GMSL and FPDL3 for now) so in probe() we detect the module type based on
+ * what we see on the I2C bus and check if it matches the FPGA bitstream (there
+ * are different bitstreams for different expansion modules). When no expansion
+ * module is present, we still let the driver initialize to allow flashing of
+ * the FPGA firmware using the SPI FLASH device. No v4l2 video devices are
+ * created in this case.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/dma/amd_xdma.h>
+#include <linux/platform_data/amd_xdma.h>
+#include <linux/spi/xilinx_spi.h>
+#include <linux/mtd/mtd.h>
+#include <linux/hwmon.h>
+#include <linux/debugfs.h>
+#include "mgb4_dma.h"
+#include "mgb4_i2c.h"
+#include "mgb4_sysfs.h"
+#include "mgb4_vout.h"
+#include "mgb4_vin.h"
+#include "mgb4_trigger.h"
+#include "mgb4_core.h"
+
+#define MGB4_USER_IRQS 16
+
+static int flashid;
+
+static struct xdma_chan_info h2c_chan_info = {
+	.dir = DMA_MEM_TO_DEV,
+};
+
+static struct xdma_chan_info c2h_chan_info = {
+	.dir = DMA_DEV_TO_MEM,
+};
+
+static struct xspi_platform_data spi_platform_data = {
+	.num_chipselect = 1,
+	.bits_per_word = 8
+};
+
+static const struct i2c_board_info extender_info = {
+	I2C_BOARD_INFO("extender", 0x21)
+};
+
+#if IS_REACHABLE(CONFIG_HWMON)
+static umode_t temp_is_visible(const void *data, enum hwmon_sensor_types type,
+			       u32 attr, int channel)
+{
+	if (type == hwmon_temp &&
+	    (attr == hwmon_temp_input || attr == hwmon_temp_label))
+		return 0444;
+	else
+		return 0;
+}
+
+static int temp_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+		     int channel, long *val)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+	u32 val10, raw;
+
+	if (type == hwmon_temp && attr == hwmon_temp_input) {
+		raw = mgb4_read_reg(&mgbdev->video, 0xD0);
+		/* register value -> Celsius degrees formula given by Xilinx */
+		val10 = ((((raw >> 20) & 0xFFF) * 503975) - 1118822400) / 409600;
+		*val = val10 * 100;
+		return 0;
+	} else {
+		return -EOPNOTSUPP;
+	}
+}
+
+static int temp_read_string(struct device *dev, enum hwmon_sensor_types type,
+			    u32 attr, int channel, const char **str)
+{
+	if (type == hwmon_temp && attr == hwmon_temp_label) {
+		*str = "FPGA Temperature";
+		return 0;
+	} else {
+		return -EOPNOTSUPP;
+	}
+}
+
+static const struct hwmon_ops temp_ops = {
+	.is_visible = temp_is_visible,
+	.read = temp_read,
+	.read_string = temp_read_string
+};
+
+static const struct hwmon_channel_info *temp_channel_info[] = {
+	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_LABEL),
+	NULL
+};
+
+static const struct hwmon_chip_info temp_chip_info = {
+	.ops = &temp_ops,
+	.info = temp_channel_info,
+};
+#endif
+
+static int match_i2c_adap(struct device *dev, void *data)
+{
+	return i2c_verify_adapter(dev) ? 1 : 0;
+}
+
+static struct i2c_adapter *get_i2c_adap(struct platform_device *pdev)
+{
+	struct device *dev;
+
+	mutex_lock(&pdev->dev.mutex);
+	dev = device_find_child(&pdev->dev, NULL, match_i2c_adap);
+	mutex_unlock(&pdev->dev.mutex);
+
+	return dev ? to_i2c_adapter(dev) : NULL;
+}
+
+static int match_spi_adap(struct device *dev, void *data)
+{
+	return to_spi_device(dev) ? 1 : 0;
+}
+
+static struct spi_master *get_spi_adap(struct platform_device *pdev)
+{
+	struct device *dev;
+
+	mutex_lock(&pdev->dev.mutex);
+	dev = device_find_child(&pdev->dev, NULL, match_spi_adap);
+	mutex_unlock(&pdev->dev.mutex);
+
+	return dev ? container_of(dev, struct spi_master, dev) : NULL;
+}
+
+static int init_spi(struct mgb4_dev *mgbdev)
+{
+	struct resource spi_resources[] = {
+		{
+			.start	= 0x400,
+			.end	= 0x47f,
+			.flags	= IORESOURCE_MEM,
+			.name	= "io-memory",
+		},
+		{
+			.start	= 14,
+			.end	= 14,
+			.flags	= IORESOURCE_IRQ,
+			.name	= "irq",
+		},
+	};
+	struct spi_board_info spi_info = {
+		.max_speed_hz = 10000000,
+		.modalias = "m25p80",
+		.chip_select = 0,
+		.mode = SPI_MODE_3,
+	};
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+	struct spi_master *master;
+	struct spi_device *spi_dev;
+	u32 irq;
+	int rv, id;
+	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
+
+	request_module("platform:xilinx_spi");
+
+	irq = xdma_get_user_irq(mgbdev->xdev, 14);
+	xdma_enable_user_irq(mgbdev->xdev, irq);
+
+	spi_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
+	spi_resources[0].start += mapbase;
+	spi_resources[0].end += mapbase;
+	spi_resources[1].start = irq;
+	spi_resources[1].end = irq;
+
+	id = pci_dev_id(pdev);
+	mgbdev->spi_pdev = platform_device_register_resndata(dev, "xilinx_spi",
+							     id, spi_resources,
+							     ARRAY_SIZE(spi_resources),
+							     &spi_platform_data,
+							     sizeof(spi_platform_data));
+	if (IS_ERR(mgbdev->spi_pdev)) {
+		dev_err(dev, "failed to register SPI device\n");
+		return PTR_ERR(mgbdev->spi_pdev);
+	}
+
+	master = get_spi_adap(mgbdev->spi_pdev);
+	if (!master) {
+		dev_err(dev, "failed to get SPI adapter\n");
+		rv = -EINVAL;
+		goto err_pdev;
+	}
+
+	snprintf(mgbdev->fw_part_name, sizeof(mgbdev->fw_part_name),
+		 "mgb4-fw.%d", flashid);
+	mgbdev->partitions[0].name = mgbdev->fw_part_name;
+	mgbdev->partitions[0].size = 0x400000;
+	mgbdev->partitions[0].offset = 0x400000;
+	mgbdev->partitions[0].mask_flags = 0;
+
+	snprintf(mgbdev->data_part_name, sizeof(mgbdev->data_part_name),
+		 "mgb4-data.%d", flashid);
+	mgbdev->partitions[1].name = mgbdev->data_part_name;
+	mgbdev->partitions[1].size = 0x10000;
+	mgbdev->partitions[1].offset = 0xFF0000;
+	mgbdev->partitions[1].mask_flags = MTD_CAP_NORFLASH;
+
+	snprintf(mgbdev->flash_name, sizeof(mgbdev->flash_name),
+		 "mgb4-flash.%d", flashid);
+	mgbdev->flash_data.name = mgbdev->flash_name;
+	mgbdev->flash_data.parts = mgbdev->partitions;
+	mgbdev->flash_data.nr_parts = ARRAY_SIZE(mgbdev->partitions);
+	mgbdev->flash_data.type = "spi-nor";
+
+	spi_info.platform_data = &mgbdev->flash_data;
+
+	spi_dev = spi_new_device(master, &spi_info);
+	put_device(&master->dev);
+	if (!spi_dev) {
+		dev_err(dev, "failed to create MTD device\n");
+		rv = -EINVAL;
+		goto err_pdev;
+	}
+
+	return 0;
+
+err_pdev:
+	platform_device_unregister(mgbdev->spi_pdev);
+
+	return rv;
+}
+
+static void free_spi(struct mgb4_dev *mgbdev)
+{
+	platform_device_unregister(mgbdev->spi_pdev);
+}
+
+static int init_i2c(struct mgb4_dev *mgbdev)
+{
+	struct resource i2c_resources[] = {
+		{
+			.start	= 0x200,
+			.end	= 0x3ff,
+			.flags	= IORESOURCE_MEM,
+			.name	= "io-memory",
+		},
+		{
+			.start	= 15,
+			.end	= 15,
+			.flags	= IORESOURCE_IRQ,
+			.name	= "irq",
+		},
+	};
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+	char clk_name[16];
+	u32 irq;
+	int rv, id;
+	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
+
+	request_module("platform:xiic-i2c");
+
+	irq = xdma_get_user_irq(mgbdev->xdev, 15);
+	xdma_enable_user_irq(mgbdev->xdev, irq);
+
+	i2c_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
+	i2c_resources[0].start += mapbase;
+	i2c_resources[0].end += mapbase;
+	i2c_resources[1].start = irq;
+	i2c_resources[1].end = irq;
+
+	id = pci_dev_id(pdev);
+
+	/* create dummy clock required by the xiic-i2c adapter */
+	snprintf(clk_name, sizeof(clk_name), "xiic-i2c.%d", id);
+	mgbdev->i2c_clk = clk_hw_register_fixed_rate(NULL, clk_name, NULL,
+						     0, 125000000);
+	if (IS_ERR(mgbdev->i2c_clk)) {
+		dev_err(dev, "failed to register I2C clock\n");
+		return PTR_ERR(mgbdev->i2c_clk);
+	}
+	mgbdev->i2c_cl = clkdev_hw_create(mgbdev->i2c_clk, NULL, "xiic-i2c.%d",
+					  id);
+	if (!mgbdev->i2c_cl) {
+		dev_err(dev, "failed to register I2C clockdev\n");
+		rv = -ENOMEM;
+		goto err_clk;
+	}
+
+	mgbdev->i2c_pdev = platform_device_register_resndata(dev, "xiic-i2c",
+							     id, i2c_resources,
+							     ARRAY_SIZE(i2c_resources),
+							     NULL, 0);
+	if (IS_ERR(mgbdev->i2c_pdev)) {
+		dev_err(dev, "failed to register I2C device\n");
+		rv = PTR_ERR(mgbdev->i2c_pdev);
+		goto err_clkdev;
+	}
+
+	mgbdev->i2c_adap = get_i2c_adap(mgbdev->i2c_pdev);
+	if (!mgbdev->i2c_adap) {
+		dev_err(dev, "failed to get I2C adapter\n");
+		rv = -EINVAL;
+		goto err_pdev;
+	}
+
+	mutex_init(&mgbdev->i2c_lock);
+
+	return 0;
+
+err_pdev:
+	platform_device_unregister(mgbdev->i2c_pdev);
+err_clkdev:
+	clkdev_drop(mgbdev->i2c_cl);
+err_clk:
+	clk_hw_unregister(mgbdev->i2c_clk);
+
+	return rv;
+}
+
+static void free_i2c(struct mgb4_dev *mgbdev)
+{
+	put_device(&mgbdev->i2c_adap->dev);
+	platform_device_unregister(mgbdev->i2c_pdev);
+	clkdev_drop(mgbdev->i2c_cl);
+	clk_hw_unregister(mgbdev->i2c_clk);
+}
+
+static int init_sysfs(struct pci_dev *pdev)
+{
+	struct device_attribute **attr, **eattr;
+	int rv;
+
+	for (attr = mgb4_pci_attrs; *attr; attr++) {
+		rv = device_create_file(&pdev->dev, *attr);
+		if (rv < 0)
+			goto err_file;
+	}
+
+	return 0;
+
+err_file:
+	for (eattr = mgb4_pci_attrs; eattr != attr; eattr++)
+		device_remove_file(&pdev->dev, *eattr);
+
+	return rv;
+}
+
+static void free_sysfs(struct pci_dev *pdev)
+{
+	struct device_attribute **attr;
+
+	for (attr = mgb4_pci_attrs; *attr; attr++)
+		device_remove_file(&pdev->dev, *attr);
+}
+
+static int get_serial_number(struct mgb4_dev *mgbdev)
+{
+	struct device *dev = &mgbdev->pdev->dev;
+	struct mtd_info *mtd;
+	size_t rs;
+	int rv;
+
+	mgbdev->serial_number = 0;
+
+	mtd = get_mtd_device_nm(mgbdev->data_part_name);
+	if (IS_ERR(mtd)) {
+		dev_warn(dev, "failed to get data MTD device\n");
+		return -ENOENT;
+	}
+	rv = mtd_read(mtd, 0, sizeof(mgbdev->serial_number), &rs,
+		      (u_char *)&mgbdev->serial_number);
+	put_mtd_device(mtd);
+	if (rv < 0 || rs != sizeof(mgbdev->serial_number)) {
+		dev_warn(dev, "error reading MTD device\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int get_module_version(struct mgb4_dev *mgbdev)
+{
+	struct device *dev = &mgbdev->pdev->dev;
+	struct mgb4_i2c_client extender;
+	s32 version;
+	u32 fw_version;
+	int rv;
+
+	rv = mgb4_i2c_init(&extender, mgbdev->i2c_adap, &extender_info, 8);
+	if (rv < 0) {
+		dev_err(dev, "failed to create extender I2C device\n");
+		return rv;
+	}
+	version = mgb4_i2c_read_byte(&extender, 0x00);
+	mgb4_i2c_free(&extender);
+	if (version < 0) {
+		dev_err(dev, "error reading module version\n");
+		return -EIO;
+	}
+
+	mgbdev->module_version = ~((u32)version) & 0xff;
+	if (!(MGB4_IS_FPDL3(mgbdev) || MGB4_IS_GMSL(mgbdev))) {
+		dev_err(dev, "unknown module type\n");
+		return -EINVAL;
+	}
+	fw_version = mgb4_read_reg(&mgbdev->video, 0xC4);
+	if (fw_version >> 24 != mgbdev->module_version >> 4) {
+		dev_err(dev, "module/firmware type mismatch\n");
+		return -EINVAL;
+	}
+
+	dev_info(dev, "%s module detected\n",
+		 MGB4_IS_FPDL3(mgbdev) ? "FPDL3" : "GMSL");
+
+	return 0;
+}
+
+static int map_regs(struct pci_dev *pdev, struct resource *res,
+		    struct mgb4_regs *regs)
+{
+	int rv;
+	resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
+
+	res->start += mapbase;
+	res->end += mapbase;
+
+	rv = mgb4_regs_map(res, regs);
+	if (rv < 0) {
+		dev_err(&pdev->dev, "failed to map %s registers\n", res->name);
+		return rv;
+	}
+
+	return 0;
+}
+
+static int init_xdma(struct mgb4_dev *mgbdev)
+{
+	struct xdma_platdata data;
+	struct resource res[2] = { 0 };
+	struct dma_slave_map *map;
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+	int i;
+
+	res[0].start = pci_resource_start(pdev, MGB4_XDMA_BAR_ID);
+	res[0].end = pci_resource_end(pdev, MGB4_XDMA_BAR_ID);
+	res[0].flags = IORESOURCE_MEM;
+	res[0].parent = &pdev->resource[MGB4_XDMA_BAR_ID];
+	res[1].start = pci_irq_vector(pdev, 0);
+	res[1].end = res[1].start + MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES
+		     + MGB4_USER_IRQS - 1;
+	res[1].flags = IORESOURCE_IRQ;
+
+	data.max_dma_channels = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
+	data.device_map = mgbdev->slave_map;
+	data.device_map_cnt = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
+
+	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
+		sprintf(mgbdev->channel_names[i], "c2h%d", i);
+		map = &data.device_map[i];
+		map->slave = mgbdev->channel_names[i];
+		map->devname = dev_name(dev);
+		map->param = XDMA_FILTER_PARAM(&c2h_chan_info);
+	}
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
+		sprintf(mgbdev->channel_names[i + MGB4_VIN_DEVICES], "h2c%d", i);
+		map = &data.device_map[i + MGB4_VIN_DEVICES];
+		map->slave = mgbdev->channel_names[i + MGB4_VIN_DEVICES];
+		map->devname = dev_name(dev);
+		map->param = XDMA_FILTER_PARAM(&h2c_chan_info);
+	}
+
+	mgbdev->xdev = platform_device_register_resndata(dev, "xdma",
+							 PLATFORM_DEVID_AUTO, res,
+							 2, &data, sizeof(data));
+	if (IS_ERR(mgbdev->xdev)) {
+		dev_err(dev, "failed to register XDMA device\n");
+		return PTR_ERR(mgbdev->xdev);
+	}
+
+	return 0;
+}
+
+static void free_xdma(struct mgb4_dev *mgbdev)
+{
+	platform_device_unregister(mgbdev->xdev);
+}
+
+static int mgb4_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	int i, rv;
+	struct mgb4_dev *mgbdev;
+	struct resource video = {
+		.start	= 0x0,
+		.end	= 0x100,
+		.flags	= IORESOURCE_MEM,
+		.name	= "mgb4-video",
+	};
+	struct resource cmt = {
+		.start	= 0x1000,
+		.end	= 0x1800,
+		.flags	= IORESOURCE_MEM,
+		.name	= "mgb4-cmt",
+	};
+	int irqs = pci_msix_vec_count(pdev);
+
+	mgbdev = kzalloc(sizeof(*mgbdev), GFP_KERNEL);
+	if (!mgbdev)
+		return -ENOMEM;
+
+	mgbdev->pdev = pdev;
+	pci_set_drvdata(pdev, mgbdev);
+
+	/* PCIe related stuff */
+	rv = pci_enable_device(pdev);
+	if (rv) {
+		dev_err(&pdev->dev, "error enabling PCI device\n");
+		goto err_mgbdev;
+	}
+
+	rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
+	if (rv)
+		dev_warn(&pdev->dev, "error enabling PCIe relaxed ordering\n");
+	rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_EXT_TAG);
+	if (rv)
+		dev_warn(&pdev->dev, "error enabling PCIe extended tag field\n");
+	rv = pcie_set_readrq(pdev, 512);
+	if (rv)
+		dev_warn(&pdev->dev, "error setting PCIe max. memory read size\n");
+	pci_set_master(pdev);
+
+	rv = pci_alloc_irq_vectors(pdev, irqs, irqs, PCI_IRQ_MSIX);
+	if (rv < 0) {
+		dev_err(&pdev->dev, "error allocating MSI-X IRQs\n");
+		goto err_enable_pci;
+	}
+
+	rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rv) {
+		dev_err(&pdev->dev, "error setting DMA mask\n");
+		goto err_enable_pci;
+	}
+
+	/* DMA + IRQ engine */
+	rv = init_xdma(mgbdev);
+	if (rv)
+		goto err_alloc_irq;
+	rv = mgb4_dma_channel_init(mgbdev);
+	if (rv)
+		goto err_dma_chan;
+
+	/* mgb4 video registers */
+	rv = map_regs(pdev, &video, &mgbdev->video);
+	if (rv < 0)
+		goto err_dma_chan;
+	/* mgb4 cmt registers */
+	rv = map_regs(pdev, &cmt, &mgbdev->cmt);
+	if (rv < 0)
+		goto err_video_regs;
+
+	/* SPI FLASH */
+	rv = init_spi(mgbdev);
+	if (rv < 0)
+		goto err_cmt_regs;
+
+	/* I2C controller */
+	rv = init_i2c(mgbdev);
+	if (rv < 0)
+		goto err_spi;
+
+	/* PCI card related sysfs attributes */
+	rv = init_sysfs(pdev);
+	if (rv < 0)
+		goto err_i2c;
+
+#if IS_REACHABLE(CONFIG_HWMON)
+	/* HWmon (card temperature) */
+	mgbdev->hwmon_dev = hwmon_device_register_with_info(&pdev->dev, "mgb4",
+							    mgbdev,
+							    &temp_chip_info, 0);
+#endif
+
+#ifdef CONFIG_DEBUG_FS
+	mgbdev->debugfs = debugfs_create_dir(dev_name(&pdev->dev), NULL);
+#endif
+
+	/* Get card serial number. On systems without MTD flash support we may
+	 * get an error thus ignore the return value. An invalid serial number
+	 * should not break anything...
+	 */
+	if (get_serial_number(mgbdev) < 0)
+		dev_warn(&pdev->dev, "error reading card serial number\n");
+
+	/* Get module type. If no valid module is found, skip the video device
+	 * creation part but do not exit with error to allow flashing the card.
+	 */
+	rv = get_module_version(mgbdev);
+	if (rv < 0)
+		goto exit;
+
+	/* Video input v4l2 devices */
+	for (i = 0; i < MGB4_VIN_DEVICES; i++)
+		mgbdev->vin[i] = mgb4_vin_create(mgbdev, i);
+
+	/* Video output v4l2 devices */
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
+		mgbdev->vout[i] = mgb4_vout_create(mgbdev, i);
+
+	/* Triggers */
+	mgbdev->indio_dev = mgb4_trigger_create(mgbdev);
+
+exit:
+	flashid++;
+
+	return 0;
+
+err_i2c:
+	free_i2c(mgbdev);
+err_spi:
+	free_spi(mgbdev);
+err_cmt_regs:
+	mgb4_regs_free(&mgbdev->cmt);
+err_video_regs:
+	mgb4_regs_free(&mgbdev->video);
+err_dma_chan:
+	mgb4_dma_channel_free(mgbdev);
+	free_xdma(mgbdev);
+err_alloc_irq:
+	pci_disable_msix(pdev);
+err_enable_pci:
+	pci_disable_device(pdev);
+err_mgbdev:
+	kfree(mgbdev);
+
+	return rv;
+}
+
+static void mgb4_remove(struct pci_dev *pdev)
+{
+	struct mgb4_dev *mgbdev = pci_get_drvdata(pdev);
+	int i;
+
+#ifdef CONFIG_DEBUG_FS
+	debugfs_remove_recursive(mgbdev->debugfs);
+#endif
+#if IS_REACHABLE(CONFIG_HWMON)
+	hwmon_device_unregister(mgbdev->hwmon_dev);
+#endif
+
+	if (mgbdev->indio_dev)
+		mgb4_trigger_free(mgbdev->indio_dev);
+
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
+		if (mgbdev->vout[i])
+			mgb4_vout_free(mgbdev->vout[i]);
+	for (i = 0; i < MGB4_VIN_DEVICES; i++)
+		if (mgbdev->vin[i])
+			mgb4_vin_free(mgbdev->vin[i]);
+
+	free_sysfs(mgbdev->pdev);
+	free_spi(mgbdev);
+	free_i2c(mgbdev);
+	mgb4_regs_free(&mgbdev->video);
+	mgb4_regs_free(&mgbdev->cmt);
+
+	mgb4_dma_channel_free(mgbdev);
+	free_xdma(mgbdev);
+
+	pci_disable_msix(mgbdev->pdev);
+	pci_disable_device(mgbdev->pdev);
+
+	kfree(mgbdev);
+}
+
+static const struct pci_device_id mgb4_pci_ids[] = {
+	{ PCI_DEVICE(0x1ed8, 0x0101), },
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, mgb4_pci_ids);
+
+static struct pci_driver mgb4_pci_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = mgb4_pci_ids,
+	.probe = mgb4_probe,
+	.remove = mgb4_remove,
+};
+
+module_pci_driver(mgb4_pci_driver);
+
+MODULE_AUTHOR("Digiteq Automotive s.r.o.");
+MODULE_DESCRIPTION("Digiteq Automotive MGB4 Driver");
+MODULE_LICENSE("GPL");
+MODULE_SOFTDEP("pre: platform:xiic-i2c platform:xilinx_spi spi-nor");
diff --git a/drivers/media/pci/mgb4/mgb4_core.h b/drivers/media/pci/mgb4/mgb4_core.h
new file mode 100644
index 000000000000..65445c41ad56
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_core.h
@@ -0,0 +1,72 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_CORE_H__
+#define __MGB4_CORE_H__
+
+#include <linux/spi/flash.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mutex.h>
+#include <linux/dmaengine.h>
+#include "mgb4_regs.h"
+
+#define MGB4_VIN_DEVICES  2
+#define MGB4_VOUT_DEVICES 2
+
+#define MGB4_MGB4_BAR_ID  0
+#define MGB4_XDMA_BAR_ID  1
+
+#define MGB4_IS_GMSL(mgbdev) \
+	((mgbdev)->module_version >> 4 == 2)
+#define MGB4_IS_FPDL3(mgbdev) \
+	((mgbdev)->module_version >> 4 == 1)
+
+struct mgb4_dma_channel {
+	struct dma_chan *chan;
+	struct completion req_compl;
+};
+
+struct mgb4_dev {
+	struct pci_dev *pdev;
+	struct platform_device *xdev;
+	struct mgb4_vin_dev *vin[MGB4_VIN_DEVICES];
+	struct mgb4_vout_dev *vout[MGB4_VOUT_DEVICES];
+
+	struct mgb4_dma_channel c2h_chan[MGB4_VIN_DEVICES];
+	struct mgb4_dma_channel h2c_chan[MGB4_VOUT_DEVICES];
+	struct dma_slave_map slave_map[MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES];
+
+	struct mgb4_regs video;
+	struct mgb4_regs cmt;
+
+	struct clk_hw *i2c_clk;
+	struct clk_lookup *i2c_cl;
+	struct platform_device *i2c_pdev;
+	struct i2c_adapter *i2c_adap;
+	struct mutex i2c_lock; /* I2C bus access lock */
+
+	struct platform_device *spi_pdev;
+	struct flash_platform_data flash_data;
+	struct mtd_partition partitions[2];
+	char flash_name[16];
+	char fw_part_name[16];
+	char data_part_name[16];
+	char channel_names[MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES][16];
+
+	struct iio_dev *indio_dev;
+#if IS_REACHABLE(CONFIG_HWMON)
+	struct device *hwmon_dev;
+#endif
+
+	u8 module_version;
+	u32 serial_number;
+
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs;
+#endif
+};
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_dma.c b/drivers/media/pci/mgb4/mgb4_dma.c
new file mode 100644
index 000000000000..cae888e6504b
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_dma.c
@@ -0,0 +1,123 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This module handles the DMA transfers. A standard dmaengine API as provided
+ * by the XDMA module is used.
+ */
+
+#include <linux/pci.h>
+#include <linux/dma-direction.h>
+#include "mgb4_core.h"
+#include "mgb4_dma.h"
+
+static void chan_irq(void *param)
+{
+	struct mgb4_dma_channel *chan = param;
+
+	complete(&chan->req_compl);
+}
+
+int mgb4_dma_transfer(struct mgb4_dev *mgbdev, u32 channel, bool write,
+		      u64 paddr, struct sg_table *sgt)
+{
+	struct dma_slave_config cfg;
+	struct mgb4_dma_channel *chan;
+	struct dma_async_tx_descriptor *tx;
+	struct pci_dev *pdev = mgbdev->pdev;
+	int ret;
+
+	memset(&cfg, 0, sizeof(cfg));
+
+	if (write) {
+		cfg.direction = DMA_MEM_TO_DEV;
+		cfg.dst_addr = paddr;
+		cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+		chan = &mgbdev->h2c_chan[channel];
+	} else {
+		cfg.direction = DMA_DEV_TO_MEM;
+		cfg.src_addr = paddr;
+		cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+		chan = &mgbdev->c2h_chan[channel];
+	}
+
+	ret = dmaengine_slave_config(chan->chan, &cfg);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to config dma: %d\n", ret);
+		return ret;
+	}
+
+	tx = dmaengine_prep_slave_sg(chan->chan, sgt->sgl, sgt->nents,
+				     cfg.direction, 0);
+	if (!tx) {
+		dev_err(&pdev->dev, "failed to prep slave sg\n");
+		return -EIO;
+	}
+
+	tx->callback = chan_irq;
+	tx->callback_param = chan;
+
+	ret = dma_submit_error(dmaengine_submit(tx));
+	if (ret) {
+		dev_err(&pdev->dev, "failed to submit sg\n");
+		return -EIO;
+	}
+
+	dma_async_issue_pending(chan->chan);
+
+	if (!wait_for_completion_timeout(&chan->req_compl,
+					 msecs_to_jiffies(10000))) {
+		dev_err(&pdev->dev, "dma timeout\n");
+		dmaengine_terminate_sync(chan->chan);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+int mgb4_dma_channel_init(struct mgb4_dev *mgbdev)
+{
+	int i, ret;
+	char name[16];
+	struct pci_dev *pdev = mgbdev->pdev;
+
+	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
+		sprintf(name, "c2h%d", i);
+		mgbdev->c2h_chan[i].chan = dma_request_chan(&pdev->dev, name);
+		if (IS_ERR(mgbdev->c2h_chan[i].chan)) {
+			dev_err(&pdev->dev, "failed to initialize %s", name);
+			ret = PTR_ERR(mgbdev->c2h_chan[i].chan);
+			mgbdev->c2h_chan[i].chan = NULL;
+			return ret;
+		}
+		init_completion(&mgbdev->c2h_chan[i].req_compl);
+	}
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
+		sprintf(name, "h2c%d", i);
+		mgbdev->h2c_chan[i].chan = dma_request_chan(&pdev->dev, name);
+		if (IS_ERR(mgbdev->h2c_chan[i].chan)) {
+			dev_err(&pdev->dev, "failed to initialize %s", name);
+			ret = PTR_ERR(mgbdev->h2c_chan[i].chan);
+			mgbdev->h2c_chan[i].chan = NULL;
+			return ret;
+		}
+		init_completion(&mgbdev->h2c_chan[i].req_compl);
+	}
+
+	return 0;
+}
+
+void mgb4_dma_channel_free(struct mgb4_dev *mgbdev)
+{
+	int i;
+
+	for (i = 0; i < MGB4_VIN_DEVICES; i++) {
+		if (mgbdev->c2h_chan[i].chan)
+			dma_release_channel(mgbdev->c2h_chan[i].chan);
+	}
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
+		if (mgbdev->h2c_chan[i].chan)
+			dma_release_channel(mgbdev->h2c_chan[i].chan);
+	}
+}
diff --git a/drivers/media/pci/mgb4/mgb4_dma.h b/drivers/media/pci/mgb4/mgb4_dma.h
new file mode 100644
index 000000000000..4ebc2b1ce9b7
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_dma.h
@@ -0,0 +1,18 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_DMA_H__
+#define __MGB4_DMA_H__
+
+#include "mgb4_core.h"
+
+int mgb4_dma_channel_init(struct mgb4_dev *mgbdev);
+void mgb4_dma_channel_free(struct mgb4_dev *mgbdev);
+
+int mgb4_dma_transfer(struct mgb4_dev *mgbdev, u32 channel, bool write,
+		      u64 paddr, struct sg_table *sgt);
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_i2c.c b/drivers/media/pci/mgb4/mgb4_i2c.c
new file mode 100644
index 000000000000..2697b67e290e
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_i2c.c
@@ -0,0 +1,140 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * The i2c module unifies the I2C access to the serializes/deserializes. The I2C
+ * chips on the GMSL module use 16b addressing, the FPDL3 chips use standard
+ * 8b addressing.
+ */
+
+#include "mgb4_i2c.h"
+
+static int read_r16(struct i2c_client *client, u16 reg, u8 *val, int len)
+{
+	int ret;
+	u8 buf[2];
+	struct i2c_msg msg[2] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = 2,
+			.buf = buf,
+		}, {
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = len,
+			.buf = val,
+		}
+	};
+
+	buf[0] = (reg >> 8) & 0xff;
+	buf[1] = (reg >> 0) & 0xff;
+
+	ret = i2c_transfer(client->adapter, msg, 2);
+	if (ret < 0)
+		return ret;
+	else if (ret != 2)
+		return -EREMOTEIO;
+	else
+		return 0;
+}
+
+static int write_r16(struct i2c_client *client, u16 reg, const u8 *val, int len)
+{
+	int ret;
+	u8 buf[4];
+	struct i2c_msg msg[1] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = 2 + len,
+			.buf = buf,
+		}
+	};
+
+	if (2 + len > sizeof(buf))
+		return -EINVAL;
+
+	buf[0] = (reg >> 8) & 0xff;
+	buf[1] = (reg >> 0) & 0xff;
+	memcpy(&buf[2], val, len);
+
+	ret = i2c_transfer(client->adapter, msg, 1);
+	if (ret < 0)
+		return ret;
+	else if (ret != 1)
+		return -EREMOTEIO;
+	else
+		return 0;
+}
+
+int mgb4_i2c_init(struct mgb4_i2c_client *client, struct i2c_adapter *adap,
+		  struct i2c_board_info const *info, int addr_size)
+{
+	client->client = i2c_new_client_device(adap, info);
+	if (IS_ERR(client->client))
+		return PTR_ERR(client->client);
+
+	client->addr_size = addr_size;
+
+	return 0;
+}
+
+void mgb4_i2c_free(struct mgb4_i2c_client *client)
+{
+	i2c_unregister_device(client->client);
+}
+
+s32 mgb4_i2c_read_byte(struct mgb4_i2c_client *client, u16 reg)
+{
+	int ret;
+	u8 b;
+
+	if (client->addr_size == 8)
+		return i2c_smbus_read_byte_data(client->client, reg);
+
+	ret = read_r16(client->client, reg, &b, 1);
+	if (ret < 0)
+		return ret;
+
+	return (s32)b;
+}
+
+s32 mgb4_i2c_write_byte(struct mgb4_i2c_client *client, u16 reg, u8 val)
+{
+	if (client->addr_size == 8)
+		return i2c_smbus_write_byte_data(client->client, reg, val);
+	else
+		return write_r16(client->client, reg, &val, 1);
+}
+
+s32 mgb4_i2c_mask_byte(struct mgb4_i2c_client *client, u16 reg, u8 mask, u8 val)
+{
+	s32 ret;
+
+	if (mask != 0xFF) {
+		ret = mgb4_i2c_read_byte(client, reg);
+		if (ret < 0)
+			return ret;
+		val |= (u8)ret & ~mask;
+	}
+
+	return mgb4_i2c_write_byte(client, reg, val);
+}
+
+int mgb4_i2c_configure(struct mgb4_i2c_client *client,
+		       const struct mgb4_i2c_kv *values, size_t count)
+{
+	size_t i;
+	s32 res;
+
+	for (i = 0; i < count; i++) {
+		res = mgb4_i2c_mask_byte(client, values[i].reg, values[i].mask,
+					 values[i].val);
+		if (res < 0)
+			return res;
+	}
+
+	return 0;
+}
diff --git a/drivers/media/pci/mgb4/mgb4_i2c.h b/drivers/media/pci/mgb4/mgb4_i2c.h
new file mode 100644
index 000000000000..fac6a1634474
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_i2c.h
@@ -0,0 +1,35 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_I2C_H__
+#define __MGB4_I2C_H__
+
+#include <linux/i2c.h>
+
+struct mgb4_i2c_client {
+	struct i2c_client *client;
+	int addr_size;
+};
+
+struct mgb4_i2c_kv {
+	u16 reg;
+	u8 mask;
+	u8 val;
+};
+
+int mgb4_i2c_init(struct mgb4_i2c_client *client, struct i2c_adapter *adap,
+		  struct i2c_board_info const *info, int addr_size);
+void mgb4_i2c_free(struct mgb4_i2c_client *client);
+
+s32 mgb4_i2c_read_byte(struct mgb4_i2c_client *client, u16 reg);
+s32 mgb4_i2c_write_byte(struct mgb4_i2c_client *client, u16 reg, u8 val);
+s32 mgb4_i2c_mask_byte(struct mgb4_i2c_client *client, u16 reg, u8 mask,
+		       u8 val);
+
+int mgb4_i2c_configure(struct mgb4_i2c_client *client,
+		       const struct mgb4_i2c_kv *values, size_t count);
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_io.h b/drivers/media/pci/mgb4/mgb4_io.h
new file mode 100644
index 000000000000..8698db1be4a9
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_io.h
@@ -0,0 +1,33 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_IO_H__
+#define __MGB4_IO_H__
+
+#include <media/v4l2-dev.h>
+
+#define MGB4_DEFAULT_WIDTH     1280
+#define MGB4_DEFAULT_HEIGHT    640
+#define MGB4_DEFAULT_PERIOD    (125000000 / 60)
+
+/* Register access error indication */
+#define MGB4_ERR_NO_REG        0xFFFFFFFE
+/* Frame buffer addresses greater than 0xFFFFFFFA indicate HW errors */
+#define MGB4_ERR_QUEUE_TIMEOUT 0xFFFFFFFD
+#define MGB4_ERR_QUEUE_EMPTY   0xFFFFFFFC
+#define MGB4_ERR_QUEUE_FULL    0xFFFFFFFB
+
+struct mgb4_frame_buffer {
+	struct vb2_v4l2_buffer vb;
+	struct list_head list;
+};
+
+static inline struct mgb4_frame_buffer *to_frame_buffer(struct vb2_v4l2_buffer *vbuf)
+{
+	return container_of(vbuf, struct mgb4_frame_buffer, vb);
+}
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_regs.c b/drivers/media/pci/mgb4/mgb4_regs.c
new file mode 100644
index 000000000000..53d4e4503a74
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_regs.c
@@ -0,0 +1,30 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#include <linux/ioport.h>
+#include "mgb4_regs.h"
+
+int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)
+{
+	regs->mapbase = res->start;
+	regs->mapsize = res->end - res->start;
+
+	if (!request_mem_region(regs->mapbase, regs->mapsize, res->name))
+		return -EINVAL;
+	regs->membase = ioremap(regs->mapbase, regs->mapsize);
+	if (!regs->membase) {
+		release_mem_region(regs->mapbase, regs->mapsize);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+void mgb4_regs_free(struct mgb4_regs *regs)
+{
+	iounmap(regs->membase);
+	release_mem_region(regs->mapbase, regs->mapsize);
+}
diff --git a/drivers/media/pci/mgb4/mgb4_regs.h b/drivers/media/pci/mgb4/mgb4_regs.h
new file mode 100644
index 000000000000..c45180890730
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_regs.h
@@ -0,0 +1,35 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_REGS_H__
+#define __MGB4_REGS_H__
+
+#include <linux/io.h>
+
+struct mgb4_regs {
+	resource_size_t mapbase;
+	resource_size_t mapsize;
+	void __iomem *membase;
+};
+
+#define mgb4_write_reg(regs, offset, val) \
+	iowrite32(val, (regs)->membase + (offset))
+#define  mgb4_read_reg(regs, offset) \
+	ioread32((regs)->membase + (offset))
+
+static inline void mgb4_mask_reg(struct mgb4_regs *regs, u32 reg, u32 mask,
+				 u32 val)
+{
+	u32 ret = mgb4_read_reg(regs, reg);
+
+	val |= ret & ~mask;
+	mgb4_write_reg(regs, reg, val);
+}
+
+int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs);
+void mgb4_regs_free(struct mgb4_regs *regs);
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_sysfs.h b/drivers/media/pci/mgb4/mgb4_sysfs.h
new file mode 100644
index 000000000000..2b42a8ba37f7
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_sysfs.h
@@ -0,0 +1,18 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_SYSFS_H__
+#define __MGB4_SYSFS_H__
+
+#include <linux/sysfs.h>
+
+extern struct device_attribute *mgb4_pci_attrs[];
+extern struct device_attribute *mgb4_fpdl3_in_attrs[];
+extern struct device_attribute *mgb4_gmsl_in_attrs[];
+extern struct device_attribute *mgb4_fpdl3_out_attrs[];
+extern struct device_attribute *mgb4_gmsl_out_attrs[];
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_in.c b/drivers/media/pci/mgb4/mgb4_sysfs_in.c
new file mode 100644
index 000000000000..4fe29158521b
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_sysfs_in.c
@@ -0,0 +1,757 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This module handles all the sysfs info/configuration that is related to the
+ * v4l2 input devices.
+ */
+
+#include <linux/device.h>
+#include "mgb4_core.h"
+#include "mgb4_i2c.h"
+#include "mgb4_vin.h"
+#include "mgb4_cmt.h"
+#include "mgb4_sysfs.h"
+
+/* Common for both FPDL3 and GMSL */
+
+static ssize_t read_input_id(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+
+	return sprintf(buf, "%d\n", vindev->config->id);
+}
+
+static ssize_t read_oldi_lane_width(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	struct mgb4_dev *mgbdev = vindev->mgbdev;
+	u16 i2c_reg;
+	u8 i2c_mask, i2c_single_val, i2c_dual_val;
+	u32 config;
+	int ret;
+
+	i2c_reg = MGB4_IS_GMSL(mgbdev) ? 0x1CE : 0x49;
+	i2c_mask = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x03;
+	i2c_single_val = MGB4_IS_GMSL(mgbdev) ? 0x00 : 0x02;
+	i2c_dual_val = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x00;
+
+	mutex_lock(&mgbdev->i2c_lock);
+	ret = mgb4_i2c_read_byte(&vindev->deser, i2c_reg);
+	mutex_unlock(&mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	config = mgb4_read_reg(&mgbdev->video, vindev->config->regs.config);
+
+	if (((config & (1U << 9)) && ((ret & i2c_mask) != i2c_dual_val)) ||
+	    (!(config & (1U << 9)) && ((ret & i2c_mask) != i2c_single_val))) {
+		dev_err(dev, "I2C/FPGA register value mismatch\n");
+		return -EINVAL;
+	}
+
+	return sprintf(buf, "%s\n", config & (1U << 9) ? "1" : "0");
+}
+
+static ssize_t write_oldi_lane_width(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	struct mgb4_dev *mgbdev = vindev->mgbdev;
+	u32 fpga_data;
+	u16 i2c_reg;
+	u8 i2c_mask, i2c_data;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* single */
+		fpga_data = 0;
+		i2c_data = MGB4_IS_GMSL(mgbdev) ? 0x00 : 0x02;
+		break;
+	case 1: /* dual */
+		fpga_data = 1U << 9;
+		i2c_data = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x00;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	i2c_reg = MGB4_IS_GMSL(mgbdev) ? 0x1CE : 0x49;
+	i2c_mask = MGB4_IS_GMSL(mgbdev) ? 0x0E : 0x03;
+
+	mutex_lock(&mgbdev->i2c_lock);
+	ret = mgb4_i2c_mask_byte(&vindev->deser, i2c_reg, i2c_mask, i2c_data);
+	mutex_unlock(&mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+	mgb4_mask_reg(&mgbdev->video, vindev->config->regs.config, 1U << 9,
+		      fpga_data);
+	if (MGB4_IS_GMSL(mgbdev)) {
+		/* reset input link */
+		mutex_lock(&mgbdev->i2c_lock);
+		ret = mgb4_i2c_mask_byte(&vindev->deser, 0x10, 1U << 5, 1U << 5);
+		mutex_unlock(&mgbdev->i2c_lock);
+		if (ret < 0)
+			return -EIO;
+	}
+
+	return count;
+}
+
+static ssize_t read_color_mapping(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
+	  vindev->config->regs.config);
+
+	return sprintf(buf, "%s\n", config & (1U << 8) ? "0" : "1");
+}
+
+static ssize_t write_color_mapping(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 fpga_data;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* OLDI/JEIDA */
+		fpga_data = (1U << 8);
+		break;
+	case 1: /* SPWG/VESA */
+		fpga_data = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.config,
+		      1U << 8, fpga_data);
+
+	return count;
+}
+
+static ssize_t read_link_status(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
+				   vindev->config->regs.status);
+
+	return sprintf(buf, "%s\n", status & (1U << 2) ? "1" : "0");
+}
+
+static ssize_t read_stream_status(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
+				   vindev->config->regs.status);
+
+	return sprintf(buf, "%s\n", ((status & (1 << 14)) &&
+		       (status & (1 << 2)) && (status & (3 << 9))) ? "1" : "0");
+}
+
+static ssize_t read_video_width(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
+	  vindev->config->regs.resolution);
+
+	return sprintf(buf, "%u\n", config >> 16);
+}
+
+static ssize_t read_video_height(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&vindev->mgbdev->video,
+	  vindev->config->regs.resolution);
+
+	return sprintf(buf, "%u\n", config & 0xFFFF);
+}
+
+static ssize_t read_hsync_status(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
+				   vindev->config->regs.status);
+	u32 res;
+
+	if (!(status & (1U << 11)))
+		res = 0x02; // not available
+	else if (status & (1U << 12))
+		res = 0x01; // active high
+	else
+		res = 0x00; // active low
+
+	return sprintf(buf, "%u\n", res);
+}
+
+static ssize_t read_vsync_status(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 status = mgb4_read_reg(&vindev->mgbdev->video,
+				   vindev->config->regs.status);
+	u32 res;
+
+	if (!(status & (1U << 11)))
+		res = 0x02; // not available
+	else if (status & (1U << 13))
+		res = 0x01; // active high
+	else
+		res = 0x00; // active low
+
+	return sprintf(buf, "%u\n", res);
+}
+
+static ssize_t read_hsync_gap(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sync = mgb4_read_reg(&vindev->mgbdev->video,
+				 vindev->config->regs.sync);
+
+	return sprintf(buf, "%u\n", sync >> 16);
+}
+
+static ssize_t write_hsync_gap(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFFFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.sync,
+		      0xFFFF0000, val << 16);
+
+	return count;
+}
+
+static ssize_t read_vsync_gap(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sync = mgb4_read_reg(&vindev->mgbdev->video,
+				 vindev->config->regs.sync);
+
+	return sprintf(buf, "%u\n", sync & 0xFFFF);
+}
+
+static ssize_t write_vsync_gap(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFFFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&vindev->mgbdev->video, vindev->config->regs.sync, 0xFFFF,
+		      val);
+
+	return count;
+}
+
+static ssize_t read_pclk_frequency(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 freq = mgb4_read_reg(&vindev->mgbdev->video,
+				 vindev->config->regs.pclk);
+
+	return sprintf(buf, "%u\n", freq);
+}
+
+static ssize_t read_hsync_width(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal);
+
+	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
+}
+
+static ssize_t read_vsync_width(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal2);
+
+	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
+}
+
+static ssize_t read_hback_porch(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal);
+
+	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
+}
+
+static ssize_t read_hfront_porch(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal);
+
+	return sprintf(buf, "%u\n", (sig & 0x000000FF));
+}
+
+static ssize_t read_vback_porch(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal2);
+
+	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
+}
+
+static ssize_t read_vfront_porch(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&vindev->mgbdev->video,
+				vindev->config->regs.signal2);
+
+	return sprintf(buf, "%u\n", (sig & 0x000000FF));
+}
+
+static ssize_t read_frequency_range(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+
+	return sprintf(buf, "%d\n", vindev->freq_range);
+}
+
+static ssize_t write_frequency_range(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	unsigned long val, flags;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 1)
+		return -EINVAL;
+
+	spin_lock_irqsave(&vindev->vdev.fh_lock, flags);
+	if (!list_empty(&vindev->vdev.fh_list)) {
+		spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
+		return -EBUSY;
+	}
+
+	mgb4_cmt_set_vin_freq_range(vindev, val);
+	vindev->freq_range = val;
+
+	spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
+
+	return count;
+}
+
+/* FPDL3 only */
+
+static ssize_t read_fpdl3_input_width(struct device *dev,
+				      struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	s32 ret;
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_read_byte(&vindev->deser, 0x34);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	switch ((u8)ret & 0x18) {
+	case 0:
+		return sprintf(buf, "0\n");
+	case 0x10:
+		return sprintf(buf, "1\n");
+	case 0x08:
+		return sprintf(buf, "2\n");
+	default:
+		return -EINVAL;
+	}
+}
+
+static ssize_t write_fpdl3_input_width(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	u8 i2c_data;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* auto */
+		i2c_data = 0x00;
+		break;
+	case 1: /* single */
+		i2c_data = 0x10;
+		break;
+	case 2: /* dual */
+		i2c_data = 0x08;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_mask_byte(&vindev->deser, 0x34, 0x18, i2c_data);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+/* GMSL only */
+
+static ssize_t read_gmsl_mode(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	s32 r1, r300, r3;
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	r1 = mgb4_i2c_read_byte(&vindev->deser, 0x01);
+	r300 = mgb4_i2c_read_byte(&vindev->deser, 0x300);
+	r3 = mgb4_i2c_read_byte(&vindev->deser, 0x03);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (r1 < 0 || r300 < 0 || r3 < 0)
+		return -EIO;
+
+	if ((r1 & 0x03) == 0x03 && (r300 & 0x0C) == 0x0C && (r3 & 0xC0) == 0xC0)
+		return sprintf(buf, "0\n");
+	else if ((r1 & 0x03) == 0x02 && (r300 & 0x0C) == 0x08 && (r3 & 0xC0) == 0x00)
+		return sprintf(buf, "1\n");
+	else if ((r1 & 0x03) == 0x01 && (r300 & 0x0C) == 0x04 && (r3 & 0xC0) == 0x00)
+		return sprintf(buf, "2\n");
+	else if ((r1 & 0x03) == 0x00 && (r300 & 0x0C) == 0x00 && (r3 & 0xC0) == 0x00)
+		return sprintf(buf, "3\n");
+	else
+		return -EINVAL;
+}
+
+static ssize_t write_gmsl_mode(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	static const struct mgb4_i2c_kv G12[] = {
+		{0x01, 0x03, 0x03}, {0x300, 0x0C, 0x0C}, {0x03, 0xC0, 0xC0}};
+	static const struct mgb4_i2c_kv G6[] = {
+		{0x01, 0x03, 0x02}, {0x300, 0x0C, 0x08}, {0x03, 0xC0, 0x00}};
+	static const struct mgb4_i2c_kv G3[] = {
+		{0x01, 0x03, 0x01}, {0x300, 0x0C, 0x04}, {0x03, 0xC0, 0x00}};
+	static const struct mgb4_i2c_kv G1[] = {
+		{0x01, 0x03, 0x00}, {0x300, 0x0C, 0x00}, {0x03, 0xC0, 0x00}};
+	static const struct mgb4_i2c_kv reset[] = {
+		{0x10, 1U << 5, 1U << 5}, {0x300, 1U << 6, 1U << 6}};
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	const struct mgb4_i2c_kv *values;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* 12Gb/s */
+		values = G12;
+		break;
+	case 1: /* 6Gb/s */
+		values = G6;
+		break;
+	case 2: /* 3Gb/s */
+		values = G3;
+		break;
+	case 3: /* 1.5Gb/s */
+		values = G1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_configure(&vindev->deser, values, 3);
+	ret |= mgb4_i2c_configure(&vindev->deser, reset, 2);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+static ssize_t read_gmsl_stream_id(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	s32 ret;
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_read_byte(&vindev->deser, 0xA0);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return sprintf(buf, "%d\n", ret & 0x03);
+}
+
+static ssize_t write_gmsl_stream_id(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	unsigned long val, flags;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 3)
+		return -EINVAL;
+
+	spin_lock_irqsave(&vindev->vdev.fh_lock, flags);
+	ret = list_empty(&vindev->vdev.fh_list);
+	spin_unlock_irqrestore(&vindev->vdev.fh_lock, flags);
+	if (!ret)
+		return -EBUSY;
+
+	/* Formaly, there is a race condition here as the change should also be
+	 * done under the spinlock above, but we only want to prevent
+	 * a resolution change while the device is in use. However, resolution
+	 * changes can happen anyway and the driver can handle them (they only
+	 * break the image, not the system).
+	 *
+	 * So instead of trying to workaround the spinlock - mgb4_i2c_mask_byte()
+	 * does sleep - we simply let the rare race condition happen...
+	 */
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_mask_byte(&vindev->deser, 0xA0, 0x03, (u8)val);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+static ssize_t read_gmsl_fec(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	s32 r3e0, r308;
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	r3e0 = mgb4_i2c_read_byte(&vindev->deser, 0x3E0);
+	r308 = mgb4_i2c_read_byte(&vindev->deser, 0x308);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (r3e0 < 0 || r308 < 0)
+		return -EIO;
+
+	if ((r3e0 & 0x07) == 0x00 && (r308 & 0x01) == 0x00)
+		return sprintf(buf, "0\n");
+	else if ((r3e0 & 0x07) == 0x07 && (r308 & 0x01) == 0x01)
+		return sprintf(buf, "1\n");
+	else
+		return -EINVAL;
+}
+
+static ssize_t write_gmsl_fec(struct device *dev, struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vin_dev *vindev = video_get_drvdata(vdev);
+	static const struct mgb4_i2c_kv enable[] = {
+		{0x3E0, 0x07, 0x07}, {0x308, 0x01, 0x01}};
+	static const struct mgb4_i2c_kv disable[] = {
+		{0x3E0, 0x07, 0x00}, {0x308, 0x01, 0x00}};
+	static const struct mgb4_i2c_kv reset[] = {
+		{0x10, 1U << 5, 1U << 5}, {0x300, 1U << 6, 1U << 6}};
+	const struct mgb4_i2c_kv *values;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* disabled */
+		values = disable;
+		break;
+	case 1: /* enabled */
+		values = enable;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&vindev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_configure(&vindev->deser, values, 2);
+	ret |= mgb4_i2c_configure(&vindev->deser, reset, 2);
+	mutex_unlock(&vindev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+static DEVICE_ATTR(input_id, 0444, read_input_id, NULL);
+static DEVICE_ATTR(oldi_lane_width, 0644, read_oldi_lane_width,
+		   write_oldi_lane_width);
+static DEVICE_ATTR(color_mapping, 0644, read_color_mapping,
+		   write_color_mapping);
+static DEVICE_ATTR(link_status, 0444, read_link_status, NULL);
+static DEVICE_ATTR(stream_status, 0444, read_stream_status, NULL);
+static DEVICE_ATTR(video_width, 0444, read_video_width, NULL);
+static DEVICE_ATTR(video_height, 0444, read_video_height, NULL);
+static DEVICE_ATTR(hsync_status, 0444, read_hsync_status, NULL);
+static DEVICE_ATTR(vsync_status, 0444, read_vsync_status, NULL);
+static DEVICE_ATTR(hsync_gap_length, 0644, read_hsync_gap, write_hsync_gap);
+static DEVICE_ATTR(vsync_gap_length, 0644, read_vsync_gap, write_vsync_gap);
+static DEVICE_ATTR(pclk_frequency, 0444, read_pclk_frequency, NULL);
+static DEVICE_ATTR(hsync_width, 0444, read_hsync_width, NULL);
+static DEVICE_ATTR(vsync_width, 0444, read_vsync_width, NULL);
+static DEVICE_ATTR(hback_porch, 0444, read_hback_porch, NULL);
+static DEVICE_ATTR(hfront_porch, 0444, read_hfront_porch, NULL);
+static DEVICE_ATTR(vback_porch, 0444, read_vback_porch, NULL);
+static DEVICE_ATTR(vfront_porch, 0444, read_vfront_porch, NULL);
+static DEVICE_ATTR(frequency_range, 0644, read_frequency_range,
+		   write_frequency_range);
+
+static DEVICE_ATTR(fpdl3_input_width, 0644, read_fpdl3_input_width,
+		   write_fpdl3_input_width);
+
+static DEVICE_ATTR(gmsl_mode, 0644, read_gmsl_mode, write_gmsl_mode);
+static DEVICE_ATTR(gmsl_stream_id, 0644, read_gmsl_stream_id,
+		   write_gmsl_stream_id);
+static DEVICE_ATTR(gmsl_fec, 0644, read_gmsl_fec, write_gmsl_fec);
+
+struct device_attribute *mgb4_fpdl3_in_attrs[] = {
+	&dev_attr_input_id,
+	&dev_attr_link_status,
+	&dev_attr_stream_status,
+	&dev_attr_video_width,
+	&dev_attr_video_height,
+	&dev_attr_hsync_status,
+	&dev_attr_vsync_status,
+	&dev_attr_oldi_lane_width,
+	&dev_attr_color_mapping,
+	&dev_attr_hsync_gap_length,
+	&dev_attr_vsync_gap_length,
+	&dev_attr_pclk_frequency,
+	&dev_attr_hsync_width,
+	&dev_attr_vsync_width,
+	&dev_attr_hback_porch,
+	&dev_attr_hfront_porch,
+	&dev_attr_vback_porch,
+	&dev_attr_vfront_porch,
+	&dev_attr_frequency_range,
+	&dev_attr_fpdl3_input_width,
+	NULL
+};
+
+struct device_attribute *mgb4_gmsl_in_attrs[] = {
+	&dev_attr_input_id,
+	&dev_attr_link_status,
+	&dev_attr_stream_status,
+	&dev_attr_video_width,
+	&dev_attr_video_height,
+	&dev_attr_hsync_status,
+	&dev_attr_vsync_status,
+	&dev_attr_oldi_lane_width,
+	&dev_attr_color_mapping,
+	&dev_attr_hsync_gap_length,
+	&dev_attr_vsync_gap_length,
+	&dev_attr_pclk_frequency,
+	&dev_attr_hsync_width,
+	&dev_attr_vsync_width,
+	&dev_attr_hback_porch,
+	&dev_attr_hfront_porch,
+	&dev_attr_vback_porch,
+	&dev_attr_vfront_porch,
+	&dev_attr_frequency_range,
+	&dev_attr_gmsl_mode,
+	&dev_attr_gmsl_stream_id,
+	&dev_attr_gmsl_fec,
+	NULL
+};
diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_out.c b/drivers/media/pci/mgb4/mgb4_sysfs_out.c
new file mode 100644
index 000000000000..243a654f75ad
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_sysfs_out.c
@@ -0,0 +1,700 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This module handles all the sysfs info/configuration that is related to the
+ * v4l2 output devices.
+ */
+
+#include <linux/device.h>
+#include "mgb4_core.h"
+#include "mgb4_i2c.h"
+#include "mgb4_vout.h"
+#include "mgb4_vin.h"
+#include "mgb4_cmt.h"
+#include "mgb4_sysfs.h"
+
+static int loopin_cnt(struct mgb4_vin_dev *vindev)
+{
+	struct mgb4_vout_dev *voutdev;
+	u32 config;
+	int i, cnt = 0;
+
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
+		voutdev = vindev->mgbdev->vout[i];
+		if (!voutdev)
+			continue;
+
+		config = mgb4_read_reg(&voutdev->mgbdev->video,
+				       voutdev->config->regs.config);
+		if ((config & 0xc) >> 2 == vindev->config->id)
+			cnt++;
+	}
+
+	return cnt;
+}
+
+/* Common for both FPDL3 and GMSL */
+
+static ssize_t read_output_id(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+
+	return sprintf(buf, "%d\n", voutdev->config->id);
+}
+
+static ssize_t read_video_source(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.config);
+
+	return sprintf(buf, "%u\n", (config & 0xc) >> 2);
+}
+
+static ssize_t write_video_source(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	struct mgb4_dev *mgbdev = voutdev->mgbdev;
+	struct mgb4_vin_dev *loopin_new = 0, *loopin_old = 0;
+	unsigned long val;
+	unsigned long flags_in[MGB4_VIN_DEVICES], flags_out[MGB4_VOUT_DEVICES];
+	ssize_t ret;
+	u32 config;
+	int i;
+
+	memset(flags_in, 0, sizeof(flags_in));
+	memset(flags_out, 0, sizeof(flags_out));
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 3)
+		return -EINVAL;
+
+	for (i = 0; i < MGB4_VIN_DEVICES; i++)
+		if (mgbdev->vin[i])
+			spin_lock_irqsave(&mgbdev->vin[i]->vdev.fh_lock,
+					  flags_in[i]);
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
+		if (mgbdev->vout[i])
+			spin_lock_irqsave(&mgbdev->vout[i]->vdev.fh_lock,
+					  flags_out[i]);
+
+	ret = -EBUSY;
+	for (i = 0; i < MGB4_VIN_DEVICES; i++)
+		if (mgbdev->vin[i] && !list_empty(&mgbdev->vin[i]->vdev.fh_list))
+			goto error;
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
+		if (mgbdev->vout[i] && !list_empty(&mgbdev->vout[i]->vdev.fh_list))
+			goto error;
+
+	config = mgb4_read_reg(&mgbdev->video, voutdev->config->regs.config);
+
+	if (((config & 0xc) >> 2) < MGB4_VIN_DEVICES)
+		loopin_old = mgbdev->vin[(config & 0xc) >> 2];
+	if (val < MGB4_VIN_DEVICES)
+		loopin_new = mgbdev->vin[val];
+	if (loopin_old && loopin_cnt(loopin_old) == 1)
+		mgb4_mask_reg(&mgbdev->video, loopin_old->config->regs.config,
+			      0x2, 0x0);
+	if (loopin_new)
+		mgb4_mask_reg(&mgbdev->video, loopin_new->config->regs.config,
+			      0x2, 0x2);
+
+	if (val == voutdev->config->id + MGB4_VIN_DEVICES)
+		mgb4_write_reg(&mgbdev->video, voutdev->config->regs.config,
+			       config & ~(1 << 1));
+	else
+		mgb4_write_reg(&mgbdev->video, voutdev->config->regs.config,
+			       config | (1U << 1));
+
+	mgb4_mask_reg(&mgbdev->video, voutdev->config->regs.config, 0xc,
+		      val << 2);
+
+	ret = count;
+
+error:
+	for (i = MGB4_VOUT_DEVICES - 1; i >= 0; i--)
+		if (mgbdev->vout[i])
+			spin_unlock_irqrestore(&mgbdev->vout[i]->vdev.fh_lock,
+					       flags_out[i]);
+	for (i = MGB4_VIN_DEVICES - 1; i >= 0; i--)
+		if (mgbdev->vin[i])
+			spin_unlock_irqrestore(&mgbdev->vin[i]->vdev.fh_lock,
+					       flags_in[i]);
+
+	return ret;
+}
+
+static ssize_t read_display_width(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.resolution);
+
+	return sprintf(buf, "%u\n", config >> 16);
+}
+
+static ssize_t write_display_width(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val, flags;
+	int ret, busy;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFFFF)
+		return -EINVAL;
+
+	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
+	busy = !list_empty(&voutdev->vdev.fh_list);
+	if (busy) {
+		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+		return -EBUSY;
+	}
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.resolution,
+		      0xFFFF0000, val << 16);
+
+	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+
+	return count;
+}
+
+static ssize_t read_display_height(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.resolution);
+
+	return sprintf(buf, "%u\n", config & 0xFFFF);
+}
+
+static ssize_t write_display_height(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val, flags;
+	int ret, busy;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFFFF)
+		return -EINVAL;
+
+	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
+	busy = !list_empty(&voutdev->vdev.fh_list);
+	if (busy) {
+		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+		return -EBUSY;
+	}
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.resolution,
+		      0xFFFF, val);
+
+	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+
+	return count;
+}
+
+static ssize_t read_frame_rate(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 period = mgb4_read_reg(&voutdev->mgbdev->video,
+				   voutdev->config->regs.frame_period);
+
+	return sprintf(buf, "%u\n", 125000000 / period);
+}
+
+static ssize_t write_frame_rate(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	mgb4_write_reg(&voutdev->mgbdev->video,
+		       voutdev->config->regs.frame_period, 125000000 / val);
+
+	return count;
+}
+
+static ssize_t read_hsync_width(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.hsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
+}
+
+static ssize_t write_hsync_width(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
+		      0x00FF0000, val << 16);
+
+	return count;
+}
+
+static ssize_t read_vsync_width(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.vsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x00FF0000) >> 16);
+}
+
+static ssize_t write_vsync_width(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
+		      0x00FF0000, val << 16);
+
+	return count;
+}
+
+static ssize_t read_hback_porch(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.hsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
+}
+
+static ssize_t write_hback_porch(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
+		      0x0000FF00, val << 8);
+
+	return count;
+}
+
+static ssize_t read_vback_porch(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.vsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x0000FF00) >> 8);
+}
+
+static ssize_t write_vback_porch(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
+		      0x0000FF00, val << 8);
+
+	return count;
+}
+
+static ssize_t read_hfront_porch(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.hsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x000000FF));
+}
+
+static ssize_t write_hfront_porch(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
+		      0x000000FF, val);
+
+	return count;
+}
+
+static ssize_t read_vfront_porch(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 sig = mgb4_read_reg(&voutdev->mgbdev->video,
+				voutdev->config->regs.vsync);
+
+	return sprintf(buf, "%u\n", (sig & 0x000000FF));
+}
+
+static ssize_t write_vfront_porch(struct device *dev,
+				  struct device_attribute *attr, const char *buf,
+				  size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 0xFF)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
+		      0x000000FF, val);
+
+	return count;
+}
+
+/* FPDL3 only */
+
+static ssize_t read_hsync_polarity(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.hsync);
+
+	return sprintf(buf, "%u\n", (config & (1U << 31)) >> 31);
+}
+
+static ssize_t write_hsync_polarity(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 1)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.hsync,
+		      (1U << 31), val << 31);
+
+	return count;
+}
+
+static ssize_t read_vsync_polarity(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.vsync);
+
+	return sprintf(buf, "%u\n", (config & (1U << 31)) >> 31);
+}
+
+static ssize_t write_vsync_polarity(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 1)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
+		      (1U << 31), val << 31);
+
+	return count;
+}
+
+static ssize_t read_de_polarity(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u32 config = mgb4_read_reg(&voutdev->mgbdev->video,
+	  voutdev->config->regs.vsync);
+
+	return sprintf(buf, "%u\n", (config & (1U << 30)) >> 30);
+}
+
+static ssize_t write_de_polarity(struct device *dev,
+				 struct device_attribute *attr, const char *buf,
+				 size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+	if (val > 1)
+		return -EINVAL;
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.vsync,
+		      (1U << 30), val << 30);
+
+	return count;
+}
+
+static ssize_t read_fpdl3_output_width(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	s32 ret;
+
+	mutex_lock(&voutdev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_read_byte(&voutdev->ser, 0x5B);
+	mutex_unlock(&voutdev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	switch ((u8)ret & 0x03) {
+	case 0:
+		return sprintf(buf, "0\n");
+	case 1:
+		return sprintf(buf, "1\n");
+	case 3:
+		return sprintf(buf, "2\n");
+	default:
+		return -EINVAL;
+	}
+}
+
+static ssize_t write_fpdl3_output_width(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	u8 i2c_data;
+	unsigned long val;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	switch (val) {
+	case 0: /* auto */
+		i2c_data = 0x00;
+		break;
+	case 1: /* single */
+		i2c_data = 0x01;
+		break;
+	case 2: /* dual */
+		i2c_data = 0x03;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&voutdev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_mask_byte(&voutdev->ser, 0x5B, 0x03, i2c_data);
+	mutex_unlock(&voutdev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+static ssize_t read_pclk_frequency(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+
+	return sprintf(buf, "%u\n", voutdev->freq);
+}
+
+static ssize_t write_pclk_frequency(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct video_device *vdev = to_video_device(dev);
+	struct mgb4_vout_dev *voutdev = video_get_drvdata(vdev);
+	unsigned long val, flags;
+	int ret, busy;
+	unsigned int dp;
+
+	ret = kstrtoul(buf, 10, &val);
+	if (ret)
+		return ret;
+
+	spin_lock_irqsave(&voutdev->vdev.fh_lock, flags);
+	busy = !list_empty(&voutdev->vdev.fh_list);
+	if (busy) {
+		spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+		return -EBUSY;
+	}
+
+	dp = (val > 50000) ? 1 : 0;
+	voutdev->freq = mgb4_cmt_set_vout_freq(voutdev, val >> dp) << dp;
+
+	spin_unlock_irqrestore(&voutdev->vdev.fh_lock, flags);
+
+	mgb4_mask_reg(&voutdev->mgbdev->video, voutdev->config->regs.config,
+		      0x10, dp << 4);
+	mutex_lock(&voutdev->mgbdev->i2c_lock);
+	ret = mgb4_i2c_mask_byte(&voutdev->ser, 0x4F, 1 << 6, ((~dp) & 1) << 6);
+	mutex_unlock(&voutdev->mgbdev->i2c_lock);
+	if (ret < 0)
+		return -EIO;
+
+	return count;
+}
+
+static DEVICE_ATTR(output_id, 0444, read_output_id, NULL);
+static DEVICE_ATTR(video_source, 0644, read_video_source, write_video_source);
+static DEVICE_ATTR(display_width, 0644, read_display_width,
+		   write_display_width);
+static DEVICE_ATTR(display_height, 0644, read_display_height,
+		   write_display_height);
+static DEVICE_ATTR(frame_rate, 0644, read_frame_rate, write_frame_rate);
+static DEVICE_ATTR(hsync_polarity, 0644, read_hsync_polarity,
+		   write_hsync_polarity);
+static DEVICE_ATTR(vsync_polarity, 0644, read_vsync_polarity,
+		   write_vsync_polarity);
+static DEVICE_ATTR(de_polarity, 0644, read_de_polarity,
+		   write_de_polarity);
+static DEVICE_ATTR(pclk_frequency, 0644, read_pclk_frequency,
+		   write_pclk_frequency);
+static DEVICE_ATTR(hsync_width, 0644, read_hsync_width, write_hsync_width);
+static DEVICE_ATTR(vsync_width, 0644, read_vsync_width, write_vsync_width);
+static DEVICE_ATTR(hback_porch, 0644, read_hback_porch, write_hback_porch);
+static DEVICE_ATTR(hfront_porch, 0644, read_hfront_porch, write_hfront_porch);
+static DEVICE_ATTR(vback_porch, 0644, read_vback_porch, write_vback_porch);
+static DEVICE_ATTR(vfront_porch, 0644, read_vfront_porch, write_vfront_porch);
+
+static DEVICE_ATTR(fpdl3_output_width, 0644, read_fpdl3_output_width,
+		   write_fpdl3_output_width);
+
+struct device_attribute *mgb4_fpdl3_out_attrs[] = {
+	&dev_attr_output_id,
+	&dev_attr_video_source,
+	&dev_attr_display_width,
+	&dev_attr_display_height,
+	&dev_attr_frame_rate,
+	&dev_attr_hsync_polarity,
+	&dev_attr_vsync_polarity,
+	&dev_attr_de_polarity,
+	&dev_attr_pclk_frequency,
+	&dev_attr_hsync_width,
+	&dev_attr_vsync_width,
+	&dev_attr_hback_porch,
+	&dev_attr_hfront_porch,
+	&dev_attr_vback_porch,
+	&dev_attr_vfront_porch,
+	&dev_attr_fpdl3_output_width,
+	NULL
+};
+
+struct device_attribute *mgb4_gmsl_out_attrs[] = {
+	&dev_attr_output_id,
+	&dev_attr_video_source,
+	&dev_attr_display_width,
+	&dev_attr_display_height,
+	&dev_attr_frame_rate,
+	NULL
+};
diff --git a/drivers/media/pci/mgb4/mgb4_sysfs_pci.c b/drivers/media/pci/mgb4/mgb4_sysfs_pci.c
new file mode 100644
index 000000000000..f98da2c5f180
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_sysfs_pci.c
@@ -0,0 +1,71 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This module handles all the sysfs info/configuration that is related to the
+ * PCI card device.
+ */
+
+#include <linux/device.h>
+#include "mgb4_core.h"
+#include "mgb4_sysfs.h"
+
+static ssize_t read_module_version(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%u\n", mgbdev->module_version & 0x0F);
+}
+
+static ssize_t read_module_type(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%u\n", mgbdev->module_version >> 4);
+}
+
+static ssize_t read_fw_version(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+	u32 config = mgb4_read_reg(&mgbdev->video, 0xC4);
+
+	return sprintf(buf, "%u\n", config & 0xFFFF);
+}
+
+static ssize_t read_fw_type(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+	u32 config = mgb4_read_reg(&mgbdev->video, 0xC4);
+
+	return sprintf(buf, "%u\n", config >> 24);
+}
+
+static ssize_t read_serial_number(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
+	u32 sn = mgbdev->serial_number;
+
+	return sprintf(buf, "%03d-%03d-%03d-%03d\n", sn >> 24, (sn >> 16) & 0xFF,
+	  (sn >> 8) & 0xFF, sn & 0xFF);
+}
+
+static DEVICE_ATTR(module_version, 0444, read_module_version, NULL);
+static DEVICE_ATTR(module_type, 0444, read_module_type, NULL);
+static DEVICE_ATTR(fw_version, 0444, read_fw_version, NULL);
+static DEVICE_ATTR(fw_type, 0444, read_fw_type, NULL);
+static DEVICE_ATTR(serial_number, 0444, read_serial_number, NULL);
+
+struct device_attribute *mgb4_pci_attrs[] = {
+	&dev_attr_module_type,
+	&dev_attr_module_version,
+	&dev_attr_fw_type,
+	&dev_attr_fw_version,
+	&dev_attr_serial_number,
+	NULL
+};
diff --git a/drivers/media/pci/mgb4/mgb4_trigger.c b/drivers/media/pci/mgb4/mgb4_trigger.c
new file mode 100644
index 000000000000..923650d53d4c
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_trigger.c
@@ -0,0 +1,208 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This module handles the IIO trigger device. The card has two signal inputs
+ * for event triggers that can be used to record events related to the video
+ * stream. A standard linux IIO device with triggered buffer capability is
+ * created and configured that can be used to fetch the events with the same
+ * clock source as the video frames.
+ */
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/pci.h>
+#include <linux/dma/amd_xdma.h>
+#include "mgb4_core.h"
+#include "mgb4_trigger.h"
+
+struct trigger_data {
+	struct mgb4_dev *mgbdev;
+	struct iio_trigger *trig;
+};
+
+static int trigger_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int *val,
+			    int *val2, long mask)
+{
+	struct trigger_data *st = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (iio_buffer_enabled(indio_dev))
+			return -EBUSY;
+		*val = mgb4_read_reg(&st->mgbdev->video, 0xA0);
+
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int trigger_set_state(struct iio_trigger *trig, bool state)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct trigger_data *st = iio_priv(indio_dev);
+	int irq = xdma_get_user_irq(st->mgbdev->xdev, 11);
+
+	if (state)
+		xdma_enable_user_irq(st->mgbdev->xdev, irq);
+	else
+		xdma_disable_user_irq(st->mgbdev->xdev, irq);
+
+	return 0;
+}
+
+static const struct iio_trigger_ops trigger_ops = {
+	.set_trigger_state = &trigger_set_state,
+};
+
+static const struct iio_info trigger_info = {
+	.read_raw         = trigger_read_raw,
+};
+
+#define TRIGGER_CHANNEL(_si) {                    \
+	.type = IIO_ACTIVITY,                         \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.scan_index = _si,                            \
+	.scan_type = {                                \
+		.sign = 'u',                              \
+		.realbits = 32,                           \
+		.storagebits = 32,                        \
+		.shift = 0,                               \
+		.endianness = IIO_CPU                     \
+	},                                            \
+}
+
+static const struct iio_chan_spec trigger_channels[] = {
+	TRIGGER_CHANNEL(0),
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static irqreturn_t trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct trigger_data *st = iio_priv(indio_dev);
+	struct {
+		u32 data;
+		s64 ts __aligned(8);
+	} scan;
+
+	scan.data = mgb4_read_reg(&st->mgbdev->video, 0xA0);
+	mgb4_write_reg(&st->mgbdev->video, 0xA0, scan.data);
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &scan, pf->timestamp);
+	iio_trigger_notify_done(indio_dev->trig);
+
+	mgb4_write_reg(&st->mgbdev->video, 0xB4, 1U << 11);
+
+	return IRQ_HANDLED;
+}
+
+static int probe_trigger(struct iio_dev *indio_dev, int irq)
+{
+	int ret;
+	struct trigger_data *st = iio_priv(indio_dev);
+
+	st->trig = iio_trigger_alloc(&st->mgbdev->pdev->dev, "%s-dev%d",
+				     indio_dev->name, iio_device_id(indio_dev));
+	if (!st->trig)
+		return -ENOMEM;
+
+	ret = request_irq(irq, &iio_trigger_generic_data_rdy_poll, 0,
+			  "mgb4-trigger", st->trig);
+	if (ret)
+		goto error_free_trig;
+
+	st->trig->ops = &trigger_ops;
+	iio_trigger_set_drvdata(st->trig, indio_dev);
+	ret = iio_trigger_register(st->trig);
+	if (ret)
+		goto error_free_irq;
+
+	indio_dev->trig = iio_trigger_get(st->trig);
+
+	return 0;
+
+error_free_irq:
+	free_irq(irq, st->trig);
+error_free_trig:
+	iio_trigger_free(st->trig);
+
+	return ret;
+}
+
+static void remove_trigger(struct iio_dev *indio_dev, int irq)
+{
+	struct trigger_data *st = iio_priv(indio_dev);
+
+	iio_trigger_unregister(st->trig);
+	free_irq(irq, st->trig);
+	iio_trigger_free(st->trig);
+}
+
+struct iio_dev *mgb4_trigger_create(struct mgb4_dev *mgbdev)
+{
+	struct iio_dev *indio_dev;
+	struct trigger_data *data;
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+	int rv, irq;
+
+	indio_dev = iio_device_alloc(dev, sizeof(*data));
+	if (!indio_dev)
+		return NULL;
+
+	indio_dev->info = &trigger_info;
+	indio_dev->name = "mgb4";
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = trigger_channels;
+	indio_dev->num_channels = ARRAY_SIZE(trigger_channels);
+
+	data = iio_priv(indio_dev);
+	data->mgbdev = mgbdev;
+
+	irq = xdma_get_user_irq(mgbdev->xdev, 11);
+	rv = probe_trigger(indio_dev, irq);
+	if (rv < 0) {
+		dev_err(dev, "iio triggered setup failed\n");
+		goto error_alloc;
+	}
+	rv = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+					trigger_handler, NULL);
+	if (rv < 0) {
+		dev_err(dev, "iio triggered buffer setup failed\n");
+		goto error_trigger;
+	}
+	rv = iio_device_register(indio_dev);
+	if (rv < 0) {
+		dev_err(dev, "iio device register failed\n");
+		goto error_buffer;
+	}
+
+	return indio_dev;
+
+error_buffer:
+	iio_triggered_buffer_cleanup(indio_dev);
+error_trigger:
+	remove_trigger(indio_dev, irq);
+error_alloc:
+	iio_device_free(indio_dev);
+
+	return NULL;
+}
+
+void mgb4_trigger_free(struct iio_dev *indio_dev)
+{
+	struct trigger_data *st = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
+	remove_trigger(indio_dev, xdma_get_user_irq(st->mgbdev->xdev, 11));
+	iio_device_free(indio_dev);
+}
diff --git a/drivers/media/pci/mgb4/mgb4_trigger.h b/drivers/media/pci/mgb4/mgb4_trigger.h
new file mode 100644
index 000000000000..6c25bc4576f6
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_trigger.h
@@ -0,0 +1,8 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+struct iio_dev *mgb4_trigger_create(struct mgb4_dev *mgbdev);
+void mgb4_trigger_free(struct iio_dev *indio_dev);
diff --git a/drivers/media/pci/mgb4/mgb4_vin.c b/drivers/media/pci/mgb4/mgb4_vin.c
new file mode 100644
index 000000000000..4712e966595a
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_vin.c
@@ -0,0 +1,930 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This is the v4l2 input device module. It initializes the signal deserializers
+ * and creates the v4l2 video devices. The input signal can change at any time
+ * which is handled by the "timings" callbacks and an IRQ based watcher, that
+ * emits the V4L2_EVENT_SOURCE_CHANGE event in case of a signal source change.
+ *
+ * When the device is in loopback mode (a direct, in HW, in->out frame passing
+ * mode) the card's frame queue must be running regardless of whether a v4l2
+ * stream is running and the output parameters like frame buffers padding must
+ * be in sync with the input parameters.
+ */
+
+#include <linux/pci.h>
+#include <linux/workqueue.h>
+#include <linux/align.h>
+#include <linux/dma/amd_xdma.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-sg.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/v4l2-event.h>
+#include "mgb4_core.h"
+#include "mgb4_dma.h"
+#include "mgb4_sysfs.h"
+#include "mgb4_io.h"
+#include "mgb4_vout.h"
+#include "mgb4_vin.h"
+
+static const struct mgb4_vin_config vin_cfg[] = {
+	{0, 0, 0, 6, {0x10, 0x00, 0x04, 0x08, 0x1C, 0x14, 0x18, 0x20, 0x24, 0x28}},
+	{1, 1, 1, 7, {0x40, 0x30, 0x34, 0x38, 0x4C, 0x44, 0x48, 0x50, 0x54, 0x58}}
+};
+
+static const struct i2c_board_info fpdl3_deser_info[] = {
+	{I2C_BOARD_INFO("deserializer1", 0x38)},
+	{I2C_BOARD_INFO("deserializer2", 0x36)},
+};
+
+static const struct i2c_board_info gmsl_deser_info[] = {
+	{I2C_BOARD_INFO("deserializer1", 0x4C)},
+	{I2C_BOARD_INFO("deserializer2", 0x2A)},
+};
+
+static const struct mgb4_i2c_kv fpdl3_i2c[] = {
+	{0x06, 0xFF, 0x04}, {0x07, 0xFF, 0x01}, {0x45, 0xFF, 0xE8},
+	{0x49, 0xFF, 0x00}, {0x34, 0xFF, 0x00}, {0x23, 0xFF, 0x00}
+};
+
+static const struct mgb4_i2c_kv gmsl_i2c[] = {
+	{0x01, 0x03, 0x03}, {0x300, 0x0C, 0x0C}, {0x03, 0xC0, 0xC0},
+	{0x1CE, 0x0E, 0x0E}, {0x11, 0x05, 0x00}, {0x05, 0xC0, 0x40},
+	{0x307, 0x0F, 0x00}, {0xA0, 0x03, 0x00}, {0x3E0, 0x07, 0x07},
+	{0x308, 0x01, 0x01}, {0x10, 0x20, 0x20}, {0x300, 0x40, 0x40}
+};
+
+static const struct v4l2_dv_timings_cap video_timings_cap = {
+	.type = V4L2_DV_BT_656_1120,
+	.bt = {
+		.min_width = 320,
+		.max_width = 4096,
+		.min_height = 240,
+		.max_height = 2160,
+		.min_pixelclock = 1843200, /* 320 x 240 x 24Hz */
+		.max_pixelclock = 530841600, /* 4096 x 2160 x 60Hz */
+		.standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
+			V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
+		.capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
+			V4L2_DV_BT_CAP_CUSTOM,
+	},
+};
+
+/*
+ * Returns the video output connected with the given video input if the input
+ * is in loopback mode.
+ */
+static struct mgb4_vout_dev *loopback_dev(struct mgb4_vin_dev *vindev, int i)
+{
+	struct mgb4_vout_dev *voutdev;
+	u32 config;
+
+	voutdev = vindev->mgbdev->vout[i];
+	if (!voutdev)
+		return NULL;
+
+	config = mgb4_read_reg(&voutdev->mgbdev->video,
+			       voutdev->config->regs.config);
+	if ((config & 0xc) >> 2 == vindev->config->id)
+		return voutdev;
+
+	return NULL;
+}
+
+/*
+ * Check, whether the loopback mode - a HW INPUT->OUTPUT transmission - is
+ * enabled on the given input.
+ */
+static int loopback_active(struct mgb4_vin_dev *vindev)
+{
+	int i;
+
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++)
+		if (loopback_dev(vindev, i))
+			return 1;
+
+	return 0;
+}
+
+/*
+ * Set the output frame buffer padding of all outputs connected with the given
+ * input when the video input is set to loopback mode. The paddings must be
+ * the same for the loopback to work properly.
+ */
+static void set_loopback_padding(struct mgb4_vin_dev *vindev, u32 padding)
+{
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	struct mgb4_vout_dev *voutdev;
+	int i;
+
+	for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
+		voutdev = loopback_dev(vindev, i);
+		if (voutdev)
+			mgb4_write_reg(video, voutdev->config->regs.padding,
+				       padding);
+	}
+}
+
+static int get_timings(struct mgb4_vin_dev *vindev,
+		       struct v4l2_dv_timings *timings)
+{
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	const struct mgb4_vin_regs *regs = &vindev->config->regs;
+
+	u32 status = mgb4_read_reg(video, regs->status);
+	u32 pclk = mgb4_read_reg(video, regs->pclk);
+	u32 signal = mgb4_read_reg(video, regs->signal);
+	u32 signal2 = mgb4_read_reg(video, regs->signal2);
+	u32 resolution = mgb4_read_reg(video, regs->resolution);
+
+	if (!(status & (1U << 2)))
+		return -ENOLCK;
+	if (!(status & (3 << 9)))
+		return -ENOLINK;
+
+	memset(timings, 0, sizeof(*timings));
+	timings->type = V4L2_DV_BT_656_1120;
+	timings->bt.width = resolution >> 16;
+	timings->bt.height = resolution & 0xFFFF;
+	if (status & (1U << 12))
+		timings->bt.polarities |= V4L2_DV_HSYNC_POS_POL;
+	if (status & (1U << 13))
+		timings->bt.polarities |= V4L2_DV_VSYNC_POS_POL;
+	timings->bt.pixelclock = pclk * 1000;
+	timings->bt.hsync = (signal & 0x00FF0000) >> 16;
+	timings->bt.vsync = (signal2 & 0x00FF0000) >> 16;
+	timings->bt.hbackporch = (signal & 0x0000FF00) >> 8;
+	timings->bt.hfrontporch = signal & 0x000000FF;
+	timings->bt.vbackporch = (signal2 & 0x0000FF00) >> 8;
+	timings->bt.vfrontporch = signal2 & 0x000000FF;
+
+	return 0;
+}
+
+static void return_all_buffers(struct mgb4_vin_dev *vindev,
+			       enum vb2_buffer_state state)
+{
+	struct mgb4_frame_buffer *buf, *node;
+	unsigned long flags;
+
+	spin_lock_irqsave(&vindev->qlock, flags);
+	list_for_each_entry_safe(buf, node, &vindev->buf_list, list) {
+		vb2_buffer_done(&buf->vb.vb2_buf, state);
+		list_del(&buf->list);
+	}
+	spin_unlock_irqrestore(&vindev->qlock, flags);
+}
+
+static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
+		       unsigned int *nplanes, unsigned int sizes[],
+		       struct device *alloc_devs[])
+{
+	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(q);
+	unsigned int size = (vindev->timings.bt.width + vindev->padding)
+	 * vindev->timings.bt.height * 4;
+
+	if (!size)
+		return -EINVAL;
+
+	if (*nplanes)
+		return sizes[0] < size ? -EINVAL : 0;
+	*nplanes = 1;
+	sizes[0] = size;
+
+	return 0;
+}
+
+static int buffer_init(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
+
+	INIT_LIST_HEAD(&buf->list);
+
+	return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
+	struct device *dev = &vindev->mgbdev->pdev->dev;
+	unsigned int size = (vindev->timings.bt.width + vindev->padding)
+	 * vindev->timings.bt.height * 4;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		dev_err(dev, "buffer too small (%lu < %u)\n",
+			vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+
+	vb2_set_plane_payload(vb, 0, size);
+
+	return 0;
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
+	unsigned long flags;
+
+	spin_lock_irqsave(&vindev->qlock, flags);
+	list_add_tail(&buf->list, &vindev->buf_list);
+	spin_unlock_irqrestore(&vindev->qlock, flags);
+}
+
+static void stop_streaming(struct vb2_queue *vq)
+{
+	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
+	const struct mgb4_vin_config *config = vindev->config;
+	int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
+
+	xdma_disable_user_irq(vindev->mgbdev->xdev, irq);
+
+	/*
+	 * In loopback mode, the HW frame queue must be left running for
+	 * the IN->OUT transmission to work!
+	 */
+	if (!loopback_active(vindev))
+		mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
+			      0x0);
+
+	cancel_work_sync(&vindev->dma_work);
+	return_all_buffers(vindev, VB2_BUF_STATE_ERROR);
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
+	const struct mgb4_vin_config *config = vindev->config;
+	int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
+
+	vindev->sequence = 0;
+
+	/*
+	 * In loopback mode, the HW frame queue is already running.
+	 */
+	if (!loopback_active(vindev))
+		mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
+			      0x2);
+
+	xdma_enable_user_irq(vindev->mgbdev->xdev, irq);
+
+	return 0;
+}
+
+static const struct vb2_ops queue_ops = {
+	.queue_setup = queue_setup,
+	.buf_init = buffer_init,
+	.buf_prepare = buffer_prepare,
+	.buf_queue = buffer_queue,
+	.start_streaming = start_streaming,
+	.stop_streaming = stop_streaming,
+	.wait_prepare = vb2_ops_wait_prepare,
+	.wait_finish = vb2_ops_wait_finish
+};
+
+static int fh_open(struct file *file)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	int rv;
+
+	mutex_lock(&vindev->lock);
+
+	rv = v4l2_fh_open(file);
+	if (rv)
+		goto out;
+
+	if (!v4l2_fh_is_singular_file(file))
+		goto out;
+
+	get_timings(vindev, &vindev->timings);
+	set_loopback_padding(vindev, vindev->padding);
+
+out:
+	mutex_unlock(&vindev->lock);
+	return rv;
+}
+
+static int fh_release(struct file *file)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	int rv;
+
+	mutex_lock(&vindev->lock);
+
+	if (v4l2_fh_is_singular_file(file))
+		set_loopback_padding(vindev, 0);
+
+	rv = _vb2_fop_release(file, NULL);
+
+	mutex_unlock(&vindev->lock);
+
+	return rv;
+}
+
+static const struct v4l2_file_operations video_fops = {
+	.owner = THIS_MODULE,
+	.open = fh_open,
+	.release = fh_release,
+	.unlocked_ioctl = video_ioctl2,
+	.read = vb2_fop_read,
+	.mmap = vb2_fop_mmap,
+	.poll = vb2_fop_poll,
+};
+
+static int vidioc_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+	strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
+
+	return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *priv,
+			   struct v4l2_fmtdesc *f)
+{
+	if (f->index != 0)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_PIX_FMT_ABGR32;
+
+	return 0;
+}
+
+static int vidioc_enum_frameintervals(struct file *file, void *priv,
+				      struct v4l2_frmivalenum *ival)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	if (ival->index != 0)
+		return -EINVAL;
+	if (ival->pixel_format != V4L2_PIX_FMT_ABGR32)
+		return -EINVAL;
+	if (ival->width != vindev->timings.bt.width ||
+	    ival->height != vindev->timings.bt.height)
+		return -EINVAL;
+
+	ival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
+	ival->stepwise.min.denominator = 60;
+	ival->stepwise.min.numerator = 1;
+	ival->stepwise.max.denominator = 1;
+	ival->stepwise.max.numerator = 1;
+	ival->stepwise.step = ival->stepwise.max;
+
+	return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = vindev->timings.bt.width;
+	f->fmt.pix.height = vindev->timings.bt.height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = (f->fmt.pix.width + vindev->padding) * 4;
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	return 0;
+}
+
+static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+
+	if (vb2_is_busy(&vindev->queue))
+		return -EBUSY;
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = vindev->timings.bt.width;
+	f->fmt.pix.height = vindev->timings.bt.height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
+				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	vindev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width * 4)) / 4;
+	mgb4_write_reg(video, vindev->config->regs.padding, vindev->padding);
+	set_loopback_padding(vindev, vindev->padding);
+
+	return 0;
+}
+
+static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = vindev->timings.bt.width;
+	f->fmt.pix.height = vindev->timings.bt.height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
+				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	return 0;
+}
+
+static int vidioc_enum_input(struct file *file, void *priv,
+			     struct v4l2_input *i)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	u32 status;
+
+	if (i->index != 0)
+		return -EINVAL;
+
+	strscpy(i->name, "MGB4", sizeof(i->name));
+	i->type = V4L2_INPUT_TYPE_CAMERA;
+	i->capabilities = V4L2_IN_CAP_DV_TIMINGS;
+	i->status = 0;
+
+	status = mgb4_read_reg(video, vindev->config->regs.status);
+	if (!(status & (1U << 2)))
+		i->status |= V4L2_IN_ST_NO_SYNC;
+	if (!(status & (3 << 9)))
+		i->status |= V4L2_IN_ST_NO_SIGNAL;
+
+	return 0;
+}
+
+static int vidioc_enum_framesizes(struct file *file, void *fh,
+				  struct v4l2_frmsizeenum *fsize)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	if (fsize->index != 0 || fsize->pixel_format != V4L2_PIX_FMT_ABGR32)
+		return -EINVAL;
+
+	fsize->discrete.width = vindev->timings.bt.width;
+	fsize->discrete.height = vindev->timings.bt.height;
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+
+	return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+	return (i == 0) ? 0 : -EINVAL;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+static int vidioc_parm(struct file *file, void *priv,
+		       struct v4l2_streamparm *parm)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	const struct mgb4_vin_regs *regs = &vindev->config->regs;
+	struct v4l2_fract timeperframe = {
+		.numerator = mgb4_read_reg(video, regs->frame_period),
+		.denominator = 125000000,
+	};
+
+	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	parm->parm.capture.readbuffers = 2;
+	parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	parm->parm.capture.timeperframe = timeperframe;
+
+	return 0;
+}
+
+static int vidioc_s_dv_timings(struct file *file, void *fh,
+			       struct v4l2_dv_timings *timings)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	if (timings->bt.width < video_timings_cap.bt.min_width ||
+	    timings->bt.width > video_timings_cap.bt.max_width ||
+	    timings->bt.height < video_timings_cap.bt.min_height ||
+	    timings->bt.height > video_timings_cap.bt.max_height)
+		return -EINVAL;
+	if (timings->bt.width == vindev->timings.bt.width &&
+	    timings->bt.height == vindev->timings.bt.height)
+		return 0;
+	if (vb2_is_busy(&vindev->queue))
+		return -EBUSY;
+
+	vindev->timings = *timings;
+
+	return 0;
+}
+
+static int vidioc_g_dv_timings(struct file *file, void *fh,
+			       struct v4l2_dv_timings *timings)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+	*timings = vindev->timings;
+
+	return 0;
+}
+
+static int vidioc_query_dv_timings(struct file *file, void *fh,
+				   struct v4l2_dv_timings *timings)
+{
+	struct mgb4_vin_dev *vindev = video_drvdata(file);
+
+	return get_timings(vindev, timings);
+}
+
+static int vidioc_enum_dv_timings(struct file *file, void *fh,
+				  struct v4l2_enum_dv_timings *timings)
+{
+	return v4l2_enum_dv_timings_cap(timings, &video_timings_cap, NULL, NULL);
+}
+
+static int vidioc_dv_timings_cap(struct file *file, void *fh,
+				 struct v4l2_dv_timings_cap *cap)
+{
+	*cap = video_timings_cap;
+
+	return 0;
+}
+
+static int vidioc_subscribe_event(struct v4l2_fh *fh,
+				  const struct v4l2_event_subscription *sub)
+{
+	switch (sub->type) {
+	case V4L2_EVENT_SOURCE_CHANGE:
+		return v4l2_src_change_event_subscribe(fh, sub);
+	}
+
+	return v4l2_ctrl_subscribe_event(fh, sub);
+}
+
+static const struct v4l2_ioctl_ops video_ioctl_ops = {
+	.vidioc_querycap = vidioc_querycap,
+	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
+	.vidioc_try_fmt_vid_cap = vidioc_try_fmt,
+	.vidioc_s_fmt_vid_cap = vidioc_s_fmt,
+	.vidioc_g_fmt_vid_cap = vidioc_g_fmt,
+	.vidioc_enum_framesizes = vidioc_enum_framesizes,
+	.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
+	.vidioc_enum_input = vidioc_enum_input,
+	.vidioc_g_input = vidioc_g_input,
+	.vidioc_s_input = vidioc_s_input,
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = vb2_ioctl_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+	.vidioc_g_parm = vidioc_parm,
+	.vidioc_s_parm = vidioc_parm,
+	.vidioc_dv_timings_cap = vidioc_dv_timings_cap,
+	.vidioc_enum_dv_timings = vidioc_enum_dv_timings,
+	.vidioc_g_dv_timings = vidioc_g_dv_timings,
+	.vidioc_s_dv_timings = vidioc_s_dv_timings,
+	.vidioc_query_dv_timings = vidioc_query_dv_timings,
+	.vidioc_subscribe_event = vidioc_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static void dma_transfer(struct work_struct *work)
+{
+	struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
+						   dma_work);
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	struct device *dev = &vindev->mgbdev->pdev->dev;
+	struct mgb4_frame_buffer *buf = 0;
+	unsigned long flags;
+	u32 addr;
+	int rv;
+
+	spin_lock_irqsave(&vindev->qlock, flags);
+	if (!list_empty(&vindev->buf_list)) {
+		buf = list_first_entry(&vindev->buf_list,
+				       struct mgb4_frame_buffer, list);
+		list_del_init(vindev->buf_list.next);
+	}
+	spin_unlock_irqrestore(&vindev->qlock, flags);
+
+	if (!buf)
+		return;
+
+	addr = mgb4_read_reg(video, vindev->config->regs.address);
+	if (addr >= MGB4_ERR_QUEUE_FULL) {
+		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		return;
+	}
+
+	rv = mgb4_dma_transfer(vindev->mgbdev, vindev->config->dma_channel,
+			       false, addr,
+			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
+	if (rv < 0) {
+		dev_warn(dev, "DMA transfer error\n");
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	} else {
+		buf->vb.vb2_buf.timestamp = ktime_get_ns();
+		buf->vb.sequence = vindev->sequence++;
+		buf->vb.field = V4L2_FIELD_NONE;
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+	}
+}
+
+static void signal_change(struct work_struct *work)
+{
+	struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
+						   err_work);
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	struct v4l2_bt_timings *timings = &vindev->timings.bt;
+	struct device *dev = &vindev->mgbdev->pdev->dev;
+
+	u32 resolution = mgb4_read_reg(video, vindev->config->regs.resolution);
+	u32 width = resolution >> 16;
+	u32 height = resolution & 0xFFFF;
+
+	if (timings->width != width || timings->height != height) {
+		static const struct v4l2_event ev = {
+			.type = V4L2_EVENT_SOURCE_CHANGE,
+			.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
+		};
+
+		v4l2_event_queue(&vindev->vdev, &ev);
+
+		if (vb2_is_streaming(&vindev->queue))
+			vb2_queue_error(&vindev->queue);
+	}
+
+	dev_dbg(dev, "stream changed to %ux%u\n", width, height);
+}
+
+static irqreturn_t vin_handler(int irq, void *ctx)
+{
+	struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+
+	schedule_work(&vindev->dma_work);
+
+	mgb4_write_reg(video, 0xB4, 1U << vindev->config->vin_irq);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t err_handler(int irq, void *ctx)
+{
+	struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+
+	schedule_work(&vindev->err_work);
+
+	mgb4_write_reg(video, 0xB4, 1U << vindev->config->err_irq);
+
+	return IRQ_HANDLED;
+}
+
+static int deser_init(struct mgb4_vin_dev *vindev, int id)
+{
+	int rv, addr_size;
+	size_t values_count;
+	const struct mgb4_i2c_kv *values;
+	const struct i2c_board_info *info;
+	struct device *dev = &vindev->mgbdev->pdev->dev;
+
+	if (MGB4_IS_GMSL(vindev->mgbdev)) {
+		info = &gmsl_deser_info[id];
+		addr_size = 16;
+		values = gmsl_i2c;
+		values_count = ARRAY_SIZE(gmsl_i2c);
+	} else {
+		info = &fpdl3_deser_info[id];
+		addr_size = 8;
+		values = fpdl3_i2c;
+		values_count = ARRAY_SIZE(fpdl3_i2c);
+	}
+
+	rv = mgb4_i2c_init(&vindev->deser, vindev->mgbdev->i2c_adap, info,
+			   addr_size);
+	if (rv < 0) {
+		dev_err(dev, "failed to create deserializer\n");
+		return rv;
+	}
+	rv = mgb4_i2c_configure(&vindev->deser, values, values_count);
+	if (rv < 0) {
+		dev_err(dev, "failed to configure deserializer\n");
+		goto err_i2c_dev;
+	}
+
+	return 0;
+
+err_i2c_dev:
+	mgb4_i2c_free(&vindev->deser);
+
+	return rv;
+}
+
+static void fpga_init(struct mgb4_vin_dev *vindev)
+{
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+	const struct mgb4_vin_regs *regs = &vindev->config->regs;
+
+	mgb4_write_reg(video, regs->config, 0x00000001);
+	mgb4_write_reg(video, regs->sync, 0x03E80002);
+	mgb4_write_reg(video, regs->padding, 0x00000000);
+	mgb4_write_reg(video, regs->config, 1U << 9);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void debugfs_init(struct mgb4_vin_dev *vindev)
+{
+	struct mgb4_regs *video = &vindev->mgbdev->video;
+
+	vindev->debugfs = debugfs_create_dir(vindev->vdev.name,
+					     vindev->mgbdev->debugfs);
+	if (!vindev->debugfs)
+		return;
+
+	vindev->regs[0].name = "CONFIG";
+	vindev->regs[0].offset = vindev->config->regs.config;
+	vindev->regs[1].name = "STATUS";
+	vindev->regs[1].offset = vindev->config->regs.status;
+	vindev->regs[2].name = "RESOLUTION";
+	vindev->regs[2].offset = vindev->config->regs.resolution;
+	vindev->regs[3].name = "FRAME_PERIOD";
+	vindev->regs[3].offset = vindev->config->regs.frame_period;
+	vindev->regs[4].name = "HS_VS_GENER_SETTINGS";
+	vindev->regs[4].offset = vindev->config->regs.sync;
+	vindev->regs[5].name = "PCLK_FREQUENCY";
+	vindev->regs[5].offset = vindev->config->regs.pclk;
+	vindev->regs[6].name = "VIDEO_PARAMS_1";
+	vindev->regs[6].offset = vindev->config->regs.signal;
+	vindev->regs[7].name = "VIDEO_PARAMS_2";
+	vindev->regs[7].offset = vindev->config->regs.signal2;
+	vindev->regs[8].name = "PADDING_PIXELS";
+	vindev->regs[8].offset = vindev->config->regs.padding;
+
+	vindev->regset.base = video->membase;
+	vindev->regset.regs = vindev->regs;
+	vindev->regset.nregs = ARRAY_SIZE(vindev->regs);
+
+	debugfs_create_regset32("registers", 0444, vindev->debugfs,
+				&vindev->regset);
+}
+#endif
+
+struct mgb4_vin_dev *mgb4_vin_create(struct mgb4_dev *mgbdev, int id)
+{
+	int rv;
+	struct device_attribute **attr, **module_attr;
+	struct mgb4_vin_dev *vindev;
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+	int vin_irq, err_irq;
+
+	vindev = kzalloc(sizeof(*vindev), GFP_KERNEL);
+	if (!vindev)
+		return NULL;
+
+	vindev->mgbdev = mgbdev;
+	vindev->config = &vin_cfg[id];
+
+	/* Frame queue*/
+	INIT_LIST_HEAD(&vindev->buf_list);
+	spin_lock_init(&vindev->qlock);
+
+	/* Work queues */
+	INIT_WORK(&vindev->dma_work, dma_transfer);
+	INIT_WORK(&vindev->err_work, signal_change);
+
+	/* IRQ callback */
+	vin_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->vin_irq);
+	rv = request_irq(vin_irq, vin_handler, 0, "mgb4-vin", vindev);
+	if (rv) {
+		dev_err(dev, "failed to register vin irq handler\n");
+		goto err_alloc;
+	}
+	/* Error IRQ callback */
+	err_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->err_irq);
+	rv = request_irq(err_irq, err_handler, 0, "mgb4-err", vindev);
+	if (rv) {
+		dev_err(dev, "failed to register err irq handler\n");
+		goto err_vin_irq;
+	}
+
+	/* Set the FPGA registers default values */
+	fpga_init(vindev);
+
+	/* Set the deserializer default values */
+	rv = deser_init(vindev, id);
+	if (rv)
+		goto err_err_irq;
+
+	/* V4L2 stuff init */
+	rv = v4l2_device_register(dev, &vindev->v4l2dev);
+	if (rv) {
+		dev_err(dev, "failed to register v4l2 device\n");
+		goto err_err_irq;
+	}
+
+	mutex_init(&vindev->lock);
+
+	vindev->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	vindev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+	vindev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
+	vindev->queue.ops = &queue_ops;
+	vindev->queue.mem_ops = &vb2_dma_sg_memops;
+	vindev->queue.gfp_flags = GFP_DMA32;
+	vindev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	vindev->queue.min_buffers_needed = 2;
+	vindev->queue.drv_priv = vindev;
+	vindev->queue.lock = &vindev->lock;
+	vindev->queue.dev = dev;
+	rv = vb2_queue_init(&vindev->queue);
+	if (rv) {
+		dev_err(dev, "failed to initialize vb2 queue\n");
+		goto err_v4l2_dev;
+	}
+
+	snprintf(vindev->vdev.name, sizeof(vindev->vdev.name), "mgb4-in%d",
+		 id + 1);
+	vindev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE
+	  | V4L2_CAP_STREAMING;
+	vindev->vdev.fops = &video_fops;
+	vindev->vdev.ioctl_ops = &video_ioctl_ops;
+	vindev->vdev.release = video_device_release_empty;
+	vindev->vdev.v4l2_dev = &vindev->v4l2dev;
+	vindev->vdev.lock = &vindev->lock;
+	vindev->vdev.queue = &vindev->queue;
+	video_set_drvdata(&vindev->vdev, vindev);
+
+	/* Enable the video signal change watcher */
+	xdma_enable_user_irq(vindev->mgbdev->xdev, err_irq);
+
+	/* Register the video device */
+	rv = video_register_device(&vindev->vdev, VFL_TYPE_VIDEO, -1);
+	if (rv) {
+		dev_err(dev, "failed to register video device\n");
+		goto err_v4l2_dev;
+	}
+
+	/* Module sysfs attributes */
+	module_attr = MGB4_IS_GMSL(mgbdev)
+	  ? mgb4_gmsl_in_attrs : mgb4_fpdl3_in_attrs;
+	for (attr = module_attr; *attr; attr++)
+		device_create_file(&vindev->vdev.dev, *attr);
+
+#ifdef CONFIG_DEBUG_FS
+	debugfs_init(vindev);
+#endif
+
+	return vindev;
+
+err_v4l2_dev:
+	v4l2_device_unregister(&vindev->v4l2dev);
+err_err_irq:
+	free_irq(err_irq, vindev);
+err_vin_irq:
+	free_irq(vin_irq, vindev);
+err_alloc:
+	kfree(vindev);
+
+	return NULL;
+}
+
+void mgb4_vin_free(struct mgb4_vin_dev *vindev)
+{
+	struct device_attribute **attr, **module_attr;
+	int vin_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
+					vindev->config->vin_irq);
+	int err_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
+					vindev->config->err_irq);
+
+	xdma_disable_user_irq(vindev->mgbdev->xdev, err_irq);
+
+	free_irq(vin_irq, vindev);
+	free_irq(err_irq, vindev);
+
+	debugfs_remove_recursive(vindev->debugfs);
+
+	module_attr = MGB4_IS_GMSL(vindev->mgbdev)
+	  ? mgb4_gmsl_in_attrs : mgb4_fpdl3_in_attrs;
+	for (attr = module_attr; *attr; attr++)
+		device_remove_file(&vindev->vdev.dev, *attr);
+
+	mgb4_i2c_free(&vindev->deser);
+	video_unregister_device(&vindev->vdev);
+	v4l2_device_unregister(&vindev->v4l2dev);
+
+	kfree(vindev);
+}
diff --git a/drivers/media/pci/mgb4/mgb4_vin.h b/drivers/media/pci/mgb4/mgb4_vin.h
new file mode 100644
index 000000000000..0249b400ad4d
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_vin.h
@@ -0,0 +1,69 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_VIN_H__
+#define __MGB4_VIN_H__
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ctrls.h>
+#include <media/videobuf2-core.h>
+#include <linux/debugfs.h>
+#include "mgb4_i2c.h"
+
+struct mgb4_vin_regs {
+	u32 address;
+	u32 config;
+	u32 status;
+	u32 resolution;
+	u32 frame_period;
+	u32 sync;
+	u32 pclk;
+	u32 signal;
+	u32 signal2;
+	u32 padding;
+};
+
+struct mgb4_vin_config {
+	int id;
+	int dma_channel;
+	int vin_irq;
+	int err_irq;
+	struct mgb4_vin_regs regs;
+};
+
+struct mgb4_vin_dev {
+	struct mgb4_dev *mgbdev;
+	struct v4l2_device v4l2dev;
+	struct video_device vdev;
+	struct vb2_queue queue;
+	struct mutex lock; /* vdev lock */
+
+	spinlock_t qlock; /* video buffer queue lock */
+	struct list_head buf_list;
+	struct work_struct dma_work, err_work;
+
+	unsigned int sequence;
+
+	struct v4l2_dv_timings timings;
+	u32 freq_range;
+	u32 padding;
+
+	struct mgb4_i2c_client deser;
+
+	const struct mgb4_vin_config *config;
+
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs;
+	struct debugfs_regset32 regset;
+	struct debugfs_reg32 regs[9];
+#endif
+};
+
+struct mgb4_vin_dev *mgb4_vin_create(struct mgb4_dev *mgbdev, int id);
+void mgb4_vin_free(struct mgb4_vin_dev *vindev);
+
+#endif
diff --git a/drivers/media/pci/mgb4/mgb4_vout.c b/drivers/media/pci/mgb4/mgb4_vout.c
new file mode 100644
index 000000000000..718a400db310
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_vout.c
@@ -0,0 +1,594 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ *
+ * This is the v4l2 output device module. It initializes the signal serializers
+ * and creates the v4l2 video devices.
+ *
+ * When the device is in loopback mode (a direct, in HW, in->out frame passing
+ * mode) we disable the v4l2 output by returning EBUSY in the open() syscall.
+ */
+
+#include <linux/pci.h>
+#include <linux/align.h>
+#include <linux/dma/amd_xdma.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-sg.h>
+#include "mgb4_core.h"
+#include "mgb4_dma.h"
+#include "mgb4_sysfs.h"
+#include "mgb4_io.h"
+#include "mgb4_cmt.h"
+#include "mgb4_vout.h"
+
+static const struct mgb4_vout_config vout_cfg[] = {
+	{0, 0, 8, {0x78, 0x60, 0x64, 0x68, 0x74, 0x6C, 0x70, 0x7c}},
+	{1, 1, 9, {0x98, 0x80, 0x84, 0x88, 0x94, 0x8c, 0x90, 0x9c}}
+};
+
+static const struct i2c_board_info fpdl3_ser_info[] = {
+	{I2C_BOARD_INFO("serializer1", 0x14)},
+	{I2C_BOARD_INFO("serializer2", 0x16)},
+};
+
+static const struct mgb4_i2c_kv fpdl3_i2c[] = {
+	{0x05, 0xFF, 0x04}, {0x06, 0xFF, 0x01}, {0xC2, 0xFF, 0x80}
+};
+
+static void return_all_buffers(struct mgb4_vout_dev *voutdev,
+			       enum vb2_buffer_state state)
+{
+	struct mgb4_frame_buffer *buf, *node;
+	unsigned long flags;
+
+	spin_lock_irqsave(&voutdev->qlock, flags);
+	list_for_each_entry_safe(buf, node, &voutdev->buf_list, list) {
+		vb2_buffer_done(&buf->vb.vb2_buf, state);
+		list_del(&buf->list);
+	}
+	spin_unlock_irqrestore(&voutdev->qlock, flags);
+}
+
+static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
+		       unsigned int *nplanes, unsigned int sizes[],
+		       struct device *alloc_devs[])
+{
+	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(q);
+	unsigned int size;
+
+	size = (voutdev->width + voutdev->padding) * voutdev->height * 4;
+
+	if (*nplanes)
+		return sizes[0] < size ? -EINVAL : 0;
+	*nplanes = 1;
+	sizes[0] = size;
+
+	return 0;
+}
+
+static int buffer_init(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
+
+	INIT_LIST_HEAD(&buf->list);
+
+	return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vb->vb2_queue);
+	struct device *dev = &voutdev->mgbdev->pdev->dev;
+	unsigned int size;
+
+	size = (voutdev->width * voutdev->padding) * voutdev->height * 4;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		dev_err(dev, "buffer too small (%lu < %u)\n",
+			vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+
+	vb2_set_plane_payload(vb, 0, size);
+
+	return 0;
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+	struct mgb4_vout_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
+	unsigned long flags;
+
+	spin_lock_irqsave(&vindev->qlock, flags);
+	list_add_tail(&buf->list, &vindev->buf_list);
+	spin_unlock_irqrestore(&vindev->qlock, flags);
+}
+
+static void stop_streaming(struct vb2_queue *vq)
+{
+	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
+	struct mgb4_dev *mgbdev = voutdev->mgbdev;
+	int irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
+
+	xdma_disable_user_irq(mgbdev->xdev, irq);
+	cancel_work_sync(&voutdev->dma_work);
+	mgb4_mask_reg(&mgbdev->video, voutdev->config->regs.config, 0x2, 0x0);
+	return_all_buffers(voutdev, VB2_BUF_STATE_ERROR);
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
+	struct mgb4_dev *mgbdev = voutdev->mgbdev;
+	struct device *dev = &mgbdev->pdev->dev;
+	struct mgb4_frame_buffer *buf;
+	struct mgb4_regs *video = &mgbdev->video;
+	const struct mgb4_vout_config *config = voutdev->config;
+	int irq = xdma_get_user_irq(mgbdev->xdev, config->irq);
+	int rv;
+	u32 addr;
+
+	mgb4_mask_reg(video, config->regs.config, 0x2, 0x2);
+
+	addr = mgb4_read_reg(video, config->regs.address);
+	if (addr >= MGB4_ERR_QUEUE_FULL) {
+		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
+		return_all_buffers(voutdev, VB2_BUF_STATE_QUEUED);
+		return -EBUSY;
+	}
+
+	buf = list_first_entry(&voutdev->buf_list, struct mgb4_frame_buffer,
+			       list);
+	list_del_init(voutdev->buf_list.next);
+
+	rv = mgb4_dma_transfer(mgbdev, config->dma_channel, true, addr,
+			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
+	if (rv < 0) {
+		dev_warn(dev, "DMA transfer error\n");
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	} else {
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+	}
+
+	xdma_enable_user_irq(mgbdev->xdev, irq);
+
+	return 0;
+}
+
+static const struct vb2_ops queue_ops = {
+	.queue_setup = queue_setup,
+	.buf_init = buffer_init,
+	.buf_prepare = buffer_prepare,
+	.buf_queue = buffer_queue,
+	.start_streaming = start_streaming,
+	.stop_streaming = stop_streaming,
+	.wait_prepare = vb2_ops_wait_prepare,
+	.wait_finish = vb2_ops_wait_finish
+};
+
+static int vidioc_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+	strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
+
+	return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *priv,
+			   struct v4l2_fmtdesc *f)
+{
+	if (f->index != 0)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_PIX_FMT_ABGR32;
+
+	return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vout_dev *voutdev = video_drvdata(file);
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = voutdev->width;
+	f->fmt.pix.height = voutdev->height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = (f->fmt.pix.width + voutdev->padding) * 4;
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	return 0;
+}
+
+static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vout_dev *voutdev = video_drvdata(file);
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+
+	if (vb2_is_busy(&voutdev->queue))
+		return -EBUSY;
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = voutdev->width;
+	f->fmt.pix.height = voutdev->height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
+				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	voutdev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width * 4)) / 4;
+	mgb4_write_reg(video, voutdev->config->regs.padding, voutdev->padding);
+
+	return 0;
+}
+
+static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct mgb4_vout_dev *voutdev = video_drvdata(file);
+
+	f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
+	f->fmt.pix.width = voutdev->width;
+	f->fmt.pix.height = voutdev->height;
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
+	f->fmt.pix.bytesperline = max(f->fmt.pix.width * 4,
+				      ALIGN_DOWN(f->fmt.pix.bytesperline, 4));
+	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
+
+	return 0;
+}
+
+static int vidioc_g_output(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+static int vidioc_s_output(struct file *file, void *priv, unsigned int i)
+{
+	return i ? -EINVAL : 0;
+}
+
+static int vidioc_enum_output(struct file *file, void *priv,
+			      struct v4l2_output *out)
+{
+	if (out->index != 0)
+		return -EINVAL;
+
+	out->type = V4L2_OUTPUT_TYPE_ANALOG;
+	strscpy(out->name, "MGB4", sizeof(out->name));
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops video_ioctl_ops = {
+	.vidioc_querycap = vidioc_querycap,
+	.vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
+	.vidioc_try_fmt_vid_out = vidioc_try_fmt,
+	.vidioc_s_fmt_vid_out = vidioc_s_fmt,
+	.vidioc_g_fmt_vid_out = vidioc_g_fmt,
+	.vidioc_enum_output = vidioc_enum_output,
+	.vidioc_g_output = vidioc_g_output,
+	.vidioc_s_output = vidioc_s_output,
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = vb2_ioctl_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+static int fh_open(struct file *file)
+{
+	struct mgb4_vout_dev *voutdev = video_drvdata(file);
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+	struct device *dev = &voutdev->mgbdev->pdev->dev;
+	u32 config, resolution;
+	int rv;
+
+	/* Return EBUSY when the device is in loopback mode */
+	config = mgb4_read_reg(video, voutdev->config->regs.config);
+	if ((config & 0xc) >> 2 != voutdev->config->id + MGB4_VIN_DEVICES) {
+		dev_dbg(dev, "can not open - device in loopback mode");
+		return -EBUSY;
+	}
+
+	mutex_lock(&voutdev->lock);
+
+	rv = v4l2_fh_open(file);
+	if (rv)
+		goto out;
+
+	if (!v4l2_fh_is_singular_file(file))
+		goto out;
+
+	resolution = mgb4_read_reg(video, voutdev->config->regs.resolution);
+	voutdev->width = resolution >> 16;
+	voutdev->height = resolution & 0xFFFF;
+
+out:
+	mutex_unlock(&voutdev->lock);
+	return rv;
+}
+
+static const struct v4l2_file_operations video_fops = {
+	.owner = THIS_MODULE,
+	.open = fh_open,
+	.release = vb2_fop_release,
+	.unlocked_ioctl = video_ioctl2,
+	.write = vb2_fop_write,
+	.mmap = vb2_fop_mmap,
+	.poll = vb2_fop_poll,
+};
+
+static void dma_transfer(struct work_struct *work)
+{
+	struct mgb4_vout_dev *voutdev = container_of(work, struct mgb4_vout_dev,
+						     dma_work);
+	struct device *dev = &voutdev->mgbdev->pdev->dev;
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+	struct mgb4_frame_buffer *buf = 0;
+	unsigned long flags;
+	u32 addr;
+	int rv;
+
+	spin_lock_irqsave(&voutdev->qlock, flags);
+	if (!list_empty(&voutdev->buf_list)) {
+		buf = list_first_entry(&voutdev->buf_list,
+				       struct mgb4_frame_buffer, list);
+		list_del_init(voutdev->buf_list.next);
+	}
+	spin_unlock_irqrestore(&voutdev->qlock, flags);
+
+	if (!buf)
+		return;
+
+	addr = mgb4_read_reg(video, voutdev->config->regs.address);
+	if (addr >= MGB4_ERR_QUEUE_FULL) {
+		dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		return;
+	}
+
+	rv = mgb4_dma_transfer(voutdev->mgbdev, voutdev->config->dma_channel,
+			       true, addr,
+			       vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
+	if (rv < 0) {
+		dev_warn(dev, "DMA transfer error\n");
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+	} else {
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+	}
+}
+
+static irqreturn_t handler(int irq, void *ctx)
+{
+	struct mgb4_vout_dev *voutdev = (struct mgb4_vout_dev *)ctx;
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+
+	schedule_work(&voutdev->dma_work);
+
+	mgb4_write_reg(video, 0xB4, 1U << voutdev->config->irq);
+
+	return IRQ_HANDLED;
+}
+
+static int ser_init(struct mgb4_vout_dev *voutdev, int id)
+{
+	int rv;
+	const struct i2c_board_info *info = &fpdl3_ser_info[id];
+	struct mgb4_i2c_client *ser = &voutdev->ser;
+	struct device *dev = &voutdev->mgbdev->pdev->dev;
+
+	if (MGB4_IS_GMSL(voutdev->mgbdev))
+		return 0;
+
+	rv = mgb4_i2c_init(ser, voutdev->mgbdev->i2c_adap, info, 8);
+	if (rv < 0) {
+		dev_err(dev, "failed to create serializer\n");
+		return rv;
+	}
+	rv = mgb4_i2c_configure(ser, fpdl3_i2c, ARRAY_SIZE(fpdl3_i2c));
+	if (rv < 0) {
+		dev_err(dev, "failed to configure serializer\n");
+		goto err_i2c_dev;
+	}
+
+	return 0;
+
+err_i2c_dev:
+	mgb4_i2c_free(ser);
+
+	return rv;
+}
+
+static void fpga_init(struct mgb4_vout_dev *voutdev)
+{
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+	const struct mgb4_vout_regs *regs = &voutdev->config->regs;
+
+	mgb4_write_reg(video, regs->config, 0x00000011);
+	mgb4_write_reg(video, regs->resolution,
+		       (MGB4_DEFAULT_WIDTH << 16) | MGB4_DEFAULT_HEIGHT);
+	mgb4_write_reg(video, regs->hsync, 0x00102020);
+	mgb4_write_reg(video, regs->vsync, 0x40020202);
+	mgb4_write_reg(video, regs->frame_period, MGB4_DEFAULT_PERIOD);
+	mgb4_write_reg(video, regs->padding, 0x00000000);
+
+	voutdev->freq = mgb4_cmt_set_vout_freq(voutdev, 70000 >> 1) << 1;
+
+	mgb4_write_reg(video, regs->config,
+		       (voutdev->config->id + MGB4_VIN_DEVICES) << 2 | 1 << 4);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void debugfs_init(struct mgb4_vout_dev *voutdev)
+{
+	struct mgb4_regs *video = &voutdev->mgbdev->video;
+
+	voutdev->debugfs = debugfs_create_dir(voutdev->vdev.name,
+					      voutdev->mgbdev->debugfs);
+	if (!voutdev->debugfs)
+		return;
+
+	voutdev->regs[0].name = "CONFIG";
+	voutdev->regs[0].offset = voutdev->config->regs.config;
+	voutdev->regs[1].name = "STATUS";
+	voutdev->regs[1].offset = voutdev->config->regs.status;
+	voutdev->regs[2].name = "RESOLUTION";
+	voutdev->regs[2].offset = voutdev->config->regs.resolution;
+	voutdev->regs[3].name = "VIDEO_PARAMS_1";
+	voutdev->regs[3].offset = voutdev->config->regs.hsync;
+	voutdev->regs[4].name = "VIDEO_PARAMS_2";
+	voutdev->regs[4].offset = voutdev->config->regs.vsync;
+	voutdev->regs[5].name = "FRAME_PERIOD";
+	voutdev->regs[5].offset = voutdev->config->regs.frame_period;
+	voutdev->regs[6].name = "PADDING";
+	voutdev->regs[6].offset = voutdev->config->regs.padding;
+
+	voutdev->regset.base = video->membase;
+	voutdev->regset.regs = voutdev->regs;
+	voutdev->regset.nregs = ARRAY_SIZE(voutdev->regs);
+
+	debugfs_create_regset32("registers", 0444, voutdev->debugfs,
+				&voutdev->regset);
+}
+#endif
+
+struct mgb4_vout_dev *mgb4_vout_create(struct mgb4_dev *mgbdev, int id)
+{
+	int rv, irq;
+	struct device_attribute **attr, **module_attr;
+	struct mgb4_vout_dev *voutdev;
+	struct mgb4_regs *video;
+	struct pci_dev *pdev = mgbdev->pdev;
+	struct device *dev = &pdev->dev;
+
+	voutdev = kzalloc(sizeof(*voutdev), GFP_KERNEL);
+	if (!voutdev)
+		return NULL;
+
+	voutdev->mgbdev = mgbdev;
+	voutdev->config = &vout_cfg[id];
+	video = &voutdev->mgbdev->video;
+
+	/* Frame queue */
+	INIT_LIST_HEAD(&voutdev->buf_list);
+	spin_lock_init(&voutdev->qlock);
+
+	/* DMA transfer stuff */
+	INIT_WORK(&voutdev->dma_work, dma_transfer);
+
+	/* IRQ callback */
+	irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
+	rv = request_irq(irq, handler, 0, "mgb4-vout", voutdev);
+	if (rv) {
+		dev_err(dev, "failed to register irq handler\n");
+		goto err_alloc;
+	}
+
+	/* Set the FPGA registers default values */
+	fpga_init(voutdev);
+
+	/* Set the serializer default values */
+	rv = ser_init(voutdev, id);
+	if (rv)
+		goto err_irq;
+
+	/* V4L2 stuff init  */
+	rv = v4l2_device_register(dev, &voutdev->v4l2dev);
+	if (rv) {
+		dev_err(dev, "failed to register v4l2 device\n");
+		goto err_irq;
+	}
+
+	mutex_init(&voutdev->lock);
+
+	voutdev->queue.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+	voutdev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
+	voutdev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
+	voutdev->queue.ops = &queue_ops;
+	voutdev->queue.mem_ops = &vb2_dma_sg_memops;
+	voutdev->queue.gfp_flags = GFP_DMA32;
+	voutdev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	voutdev->queue.min_buffers_needed = 2;
+	voutdev->queue.drv_priv = voutdev;
+	voutdev->queue.lock = &voutdev->lock;
+	voutdev->queue.dev = dev;
+	rv = vb2_queue_init(&voutdev->queue);
+	if (rv) {
+		dev_err(dev, "failed to initialize vb2 queue\n");
+		goto err_v4l2_dev;
+	}
+
+	snprintf(voutdev->vdev.name, sizeof(voutdev->vdev.name), "mgb4-out%d",
+		 id + 1);
+	voutdev->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE
+	  | V4L2_CAP_STREAMING;
+	voutdev->vdev.vfl_dir = VFL_DIR_TX;
+	voutdev->vdev.fops = &video_fops;
+	voutdev->vdev.ioctl_ops = &video_ioctl_ops;
+	voutdev->vdev.release = video_device_release_empty;
+	voutdev->vdev.v4l2_dev = &voutdev->v4l2dev;
+	voutdev->vdev.lock = &voutdev->lock;
+	voutdev->vdev.queue = &voutdev->queue;
+	video_set_drvdata(&voutdev->vdev, voutdev);
+
+	rv = video_register_device(&voutdev->vdev, VFL_TYPE_VIDEO, -1);
+	if (rv) {
+		dev_err(dev, "failed to register video device\n");
+		goto err_v4l2_dev;
+	}
+
+	/* Module sysfs attributes */
+	module_attr = MGB4_IS_GMSL(mgbdev)
+	  ? mgb4_gmsl_out_attrs : mgb4_fpdl3_out_attrs;
+	for (attr = module_attr; *attr; attr++)
+		device_create_file(&voutdev->vdev.dev, *attr);
+
+#ifdef CONFIG_DEBUG_FS
+	debugfs_init(voutdev);
+#endif
+
+	return voutdev;
+
+err_v4l2_dev:
+	v4l2_device_unregister(&voutdev->v4l2dev);
+err_irq:
+	free_irq(irq, voutdev);
+err_alloc:
+	kfree(voutdev);
+
+	return NULL;
+}
+
+void mgb4_vout_free(struct mgb4_vout_dev *voutdev)
+{
+	struct device_attribute **attr, **module_attr;
+	int irq = xdma_get_user_irq(voutdev->mgbdev->xdev, voutdev->config->irq);
+
+	free_irq(irq, voutdev);
+
+	debugfs_remove_recursive(voutdev->debugfs);
+
+	module_attr = MGB4_IS_GMSL(voutdev->mgbdev)
+	  ? mgb4_gmsl_out_attrs : mgb4_fpdl3_out_attrs;
+	for (attr = module_attr; *attr; attr++)
+		device_remove_file(&voutdev->vdev.dev, *attr);
+
+	mgb4_i2c_free(&voutdev->ser);
+	video_unregister_device(&voutdev->vdev);
+	v4l2_device_unregister(&voutdev->v4l2dev);
+
+	kfree(voutdev);
+}
diff --git a/drivers/media/pci/mgb4/mgb4_vout.h b/drivers/media/pci/mgb4/mgb4_vout.h
new file mode 100644
index 000000000000..b163dee711fd
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_vout.h
@@ -0,0 +1,65 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2023 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_VOUT_H__
+#define __MGB4_VOUT_H__
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ctrls.h>
+#include <media/videobuf2-core.h>
+#include <linux/debugfs.h>
+#include "mgb4_i2c.h"
+
+struct mgb4_vout_regs {
+	u32 address;
+	u32 config;
+	u32 status;
+	u32 resolution;
+	u32 frame_period;
+	u32 hsync;
+	u32 vsync;
+	u32 padding;
+};
+
+struct mgb4_vout_config {
+	int id;
+	int dma_channel;
+	int irq;
+	struct mgb4_vout_regs regs;
+};
+
+struct mgb4_vout_dev {
+	struct mgb4_dev *mgbdev;
+	struct v4l2_device v4l2dev;
+	struct video_device vdev;
+	struct vb2_queue queue;
+	struct mutex lock; /* vdev lock */
+
+	spinlock_t qlock; /* buffer queue lock */
+	struct list_head buf_list;
+	struct work_struct dma_work;
+
+	u32 width;
+	u32 height;
+	u32 freq;
+	u32 padding;
+
+	struct mgb4_i2c_client ser;
+
+	const struct mgb4_vout_config *config;
+
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs;
+	struct debugfs_regset32 regset;
+	struct debugfs_reg32 regs[7];
+#endif
+};
+
+struct mgb4_vout_dev *mgb4_vout_create(struct mgb4_dev *mgbdev, int id);
+void mgb4_vout_free(struct mgb4_vout_dev *voutdev);
+
+#endif