[v5,0/5] Add support for DCMIPP camera interface of STMicroelectronics STM32 SoC series

This patchset introduces support for Digital Camera Memory Interface
Pixel Processor (DCMIPP) of STMicroelectronics STM32 SoC series.

This initial support implements a single capture pipe
allowing RGB565, YUV, Y, RAW8 and JPEG capture with
frame skipping, prescaling and cropping.

DCMIPP is exposed through 3 subdevices:
- dcmipp_dump_parallel: parallel interface handling
- dcmipp_dump_postproc: frame skipping, prescaling and cropping control
- dcmipp_dump_capture: video device capture node

v5:
  - removal of dcmipp_frame_size & dcmipp_frame_stride and use
    v4l2_fill_pixfmt
  - correct typos & avoid check of available buffer at start_streaming
    time since this is done by vb2 framework
  - avoid set of pad format in dcmipp_par_ent_init and
    dcmipp_byteproc_ent_init since done via init_cfg
  - reorder bound functions
  - use v4l2_subdev_get_fmt in parallel and byteproc subdevs
  - correct struct dcmipp_ent_device comments
  - removal of dcmipp_hdw_pixel_alignment in bytecap subdev since not
    applicable in this byte mode pipeline

v4:
  - rework of mutex / spinlock handling
  - addition of dma mask setting
  - removal of __maybe_unused, use pm_ptr and new declaration macros
  - driver now only generate a single stm32-dcmipp.ko module instead of
    several as before
  - removal of the component framework usage
  - various small fixes (function names, lowercase values, indentation,
    print formats)
  - register name removal in register access function, only dev_dbg with
    address & values are kept
  - removal of VB2_READ and CAP_READWRITE
  - usage of subdev active state mechanism and removal of locally stored
    format/compose/crop
  - addition of port { } within the stm32mp135.dtsi

v3:
  - Have same To & Cc in all patches emails of the serie so that everybody
    has coherent view of the serie
  - bindings: correct wording, clock-names & label removal
  - driver: replace of_graph call with fwnode_graph
  - driver: use defined bus-type when calling v4l2_fwnode_endpoint_parse
  - driver: remove clock name
  - dtsi: remove clock-names property

v2:
  - removal of pclk-max-frequency from yaml example dts
  - codying-style fixes
  - correction in enum functions (format, mbus, frame_size ...) handling
  - drop of v4l2_pipeline_pm_ calls, and specific open/close handler of
    vdev
  - video dev s_stream handling updated to call s_stream of remote subdev
    instead of loop until sensor subdev
  - code update following media_pipeline & v4l2_async_ api changes since v1
  - removal of IP reset call upon error
  - removal of link_validate handlers
  - addition of V4L2_CAP_IO_MC device_caps
  - removal of the frame skip control for the time being, will be added
    back in another commit once control method will be agreed
  - change byteproc entity type to MEDIA_ENT_F_PROC_VIDEO_SCALER
  - various fixes from Dan & Sakari remarks

Alain Volmat (2):
  dt-bindings: media: add bindings for stm32 dcmipp
  media: MAINTAINERS: add entry for STM32 DCMIPP driver

Hugues Fruchet (3):
  media: stm32-dcmipp: STM32 DCMIPP camera interface driver
  ARM: dts: stm32: add dcmipp support to stm32mp135
  ARM: multi_v7_defconfig: enable STM32 DCMIPP media support

 .../bindings/media/st,stm32-dcmipp.yaml       |  89 ++
 MAINTAINERS                                   |   5 +-
 arch/arm/boot/dts/st/stm32mp135.dtsi          |  11 +
 arch/arm/configs/multi_v7_defconfig           |   1 +
 drivers/media/platform/st/stm32/Kconfig       |  15 +
 drivers/media/platform/st/stm32/Makefile      |   1 +
 .../platform/st/stm32/stm32-dcmipp/Makefile   |   4 +
 .../st/stm32/stm32-dcmipp/dcmipp-bytecap.c    | 916 ++++++++++++++++++
 .../st/stm32/stm32-dcmipp/dcmipp-byteproc.c   | 555 +++++++++++
 .../st/stm32/stm32-dcmipp/dcmipp-common.c     | 106 ++
 .../st/stm32/stm32-dcmipp/dcmipp-common.h     | 216 +++++
 .../st/stm32/stm32-dcmipp/dcmipp-core.c       | 603 ++++++++++++
 .../st/stm32/stm32-dcmipp/dcmipp-parallel.c   | 441 +++++++++
 13 files changed, 2962 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/media/st,stm32-dcmipp.yaml
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/Makefile
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-bytecap.c
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-byteproc.c
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-common.c
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-common.h
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
 create mode 100644 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-parallel.c