| Message ID | 20240313072516.241106-31-sakari.ailus@linux.intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v8,01/38] media: mc: Add INTERNAL pad flag | expand |
Hi Sakari, Thank you for the patch. On Wed, Mar 13, 2024 at 09:25:08AM +0200, Sakari Ailus wrote: > Document which routes are available for the CCS driver (source) sub-device > and what configuration are possible. > > Also update copyright. > > Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> > --- > .../userspace-api/media/drivers/ccs.rst | 34 ++++++++++++++++++- > .../media/v4l/subdev-formats.rst | 2 ++ > 2 files changed, 35 insertions(+), 1 deletion(-) > > diff --git a/Documentation/userspace-api/media/drivers/ccs.rst b/Documentation/userspace-api/media/drivers/ccs.rst > index 03015b33d5ab..bc2804ec663b 100644 > --- a/Documentation/userspace-api/media/drivers/ccs.rst > +++ b/Documentation/userspace-api/media/drivers/ccs.rst > @@ -111,4 +111,36 @@ than in the centre. > Shading correction needs to be enabled for luminance correction level to have an > effect. > > -**Copyright** |copy| 2020 Intel Corporation > +.. _media-ccs-routes: > + > +Routes > +------ > + > +The CCS driver implements one or two :ref:`routes <subdev-routing>` in > +its source sub-device (scaler sub-device if exists for the device, otherwise > +binner) depending on whether the sensor supports embedded data. (All CCS > +compliant sensors do but the CCS driver supports preceding standards that did > +not require embedded data support, too.) s/too.)/too). > + > +The first route of the CCS source sub-device is for pixel data (internal pad > +1/stream 0 -> pad 0/stream 0) and the second one is for embedded data (internal I thought the source subdev had one external sink pad for image data, one internal sink pad for embedded data, and one source pad. > +pad 2/stream 0 -> pad 0/stream 1). > + > +Embedded data > +~~~~~~~~~~~~~ > + > +MIPI CCS supports generation of camera sensor embedded data. The media bus code > +used for this format is :ref:`MEDIA_BUS_FMT_CCS_EMBEDDDED > +<MEDIA-BUS-FMT-CCS-EMBEDDED>`. Maybe state that this is the format on the internal ED sink pad. > + > +The bit depth of the CCS pixel data affects how the sensor will output the > +embedded data, adding padding to align with CSI-2 bus :ref:`Data units > +<media-glossary-data-unit>` for that particular bit depth. This is indicated by > +the generic metadata format on the sensor's source sub-device's source pad. > + > +Embedded data for bit depths greater than or equal to 16 may support more dense > +packing or legacy single metadata byte per data unit, or both of these, > +depending on the device. The supported embedded data formats can be enumerated > +and configured on stream 1 of the source pad (1) of the CCS source sub-device. > + > +**Copyright** |copy| 2020, 2023 Intel Corporation 2024 ? > diff --git a/Documentation/userspace-api/media/v4l/subdev-formats.rst b/Documentation/userspace-api/media/v4l/subdev-formats.rst > index c8f982411e70..ca4da6a400ff 100644 > --- a/Documentation/userspace-api/media/v4l/subdev-formats.rst > +++ b/Documentation/userspace-api/media/v4l/subdev-formats.rst > @@ -8592,3 +8592,5 @@ levels above. > This mbus code are only used for "2-byte simplified tagged data format" (code > 0xa) but their use may be extended further in the future, to cover other CCS > embedded data format codes. > + > +Also see :ref:`CCS driver documentation <media-ccs-routes>`.
diff --git a/Documentation/userspace-api/media/drivers/ccs.rst b/Documentation/userspace-api/media/drivers/ccs.rst index 03015b33d5ab..bc2804ec663b 100644 --- a/Documentation/userspace-api/media/drivers/ccs.rst +++ b/Documentation/userspace-api/media/drivers/ccs.rst @@ -111,4 +111,36 @@ than in the centre. Shading correction needs to be enabled for luminance correction level to have an effect. -**Copyright** |copy| 2020 Intel Corporation +.. _media-ccs-routes: + +Routes +------ + +The CCS driver implements one or two :ref:`routes <subdev-routing>` in +its source sub-device (scaler sub-device if exists for the device, otherwise +binner) depending on whether the sensor supports embedded data. (All CCS +compliant sensors do but the CCS driver supports preceding standards that did +not require embedded data support, too.) + +The first route of the CCS source sub-device is for pixel data (internal pad +1/stream 0 -> pad 0/stream 0) and the second one is for embedded data (internal +pad 2/stream 0 -> pad 0/stream 1). + +Embedded data +~~~~~~~~~~~~~ + +MIPI CCS supports generation of camera sensor embedded data. The media bus code +used for this format is :ref:`MEDIA_BUS_FMT_CCS_EMBEDDDED +<MEDIA-BUS-FMT-CCS-EMBEDDED>`. + +The bit depth of the CCS pixel data affects how the sensor will output the +embedded data, adding padding to align with CSI-2 bus :ref:`Data units +<media-glossary-data-unit>` for that particular bit depth. This is indicated by +the generic metadata format on the sensor's source sub-device's source pad. + +Embedded data for bit depths greater than or equal to 16 may support more dense +packing or legacy single metadata byte per data unit, or both of these, +depending on the device. The supported embedded data formats can be enumerated +and configured on stream 1 of the source pad (1) of the CCS source sub-device. + +**Copyright** |copy| 2020, 2023 Intel Corporation diff --git a/Documentation/userspace-api/media/v4l/subdev-formats.rst b/Documentation/userspace-api/media/v4l/subdev-formats.rst index c8f982411e70..ca4da6a400ff 100644 --- a/Documentation/userspace-api/media/v4l/subdev-formats.rst +++ b/Documentation/userspace-api/media/v4l/subdev-formats.rst @@ -8592,3 +8592,5 @@ levels above. This mbus code are only used for "2-byte simplified tagged data format" (code 0xa) but their use may be extended further in the future, to cover other CCS embedded data format codes. + +Also see :ref:`CCS driver documentation <media-ccs-routes>`.
Document which routes are available for the CCS driver (source) sub-device and what configuration are possible. Also update copyright. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- .../userspace-api/media/drivers/ccs.rst | 34 ++++++++++++++++++- .../media/v4l/subdev-formats.rst | 2 ++ 2 files changed, 35 insertions(+), 1 deletion(-)