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media: v4l2: extend the CSC API to subdevice.

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This patch extends the CSC API in video devices to be supported
also on sub-devices. The flag V4L2_MBUS_FRAMEFMT_SET_CSC set by
the application when calling VIDIOC_SUBDEV_S_FMT ioctl.
The flags:

V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE,
V4L2_SUBDEV_MBUS_CODE_CSC_XFER_FUNC,
V4L2_SUBDEV_MBUS_CODE_CSC_YCBCR_ENC/V4L2_SUBDEV_MBUS_CODE_CSC_HSV_ENC
V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION

are set by the driver in the VIDIOC_SUBDEV_ENUM_MBUS_CODE ioctl.

New 'flags' fields were added to the structs
v4l2_subdev_mbus_code_enum, v4l2_mbus_framefmt which are borrowed
from the 'reserved' field

The patch also replaces the 'ycbcr_enc' field in
'struct v4l2_mbus_framefmt' with a union that includes 'hsv_enc'

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Dafna Hirschfeld
2020-08-27 21:46:10 +02:00
committed by Mauro Carvalho Chehab
parent 2f49146349
commit 62aacfa9bf
4 changed files with 157 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/userspace-api/media/v4l/vidioc-subdev-enum-mbus-code.rst
+50 -1
View File
@@ -72,11 +72,60 @@ information about the try formats.
- Media bus format codes to be enumerated, from enum
:ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`.
* - __u32
- ``reserved``\ [8]
- ``flags``
- See :ref:`v4l2-subdev-mbus-code-flags`
* - __u32
- ``reserved``\ [7]
- Reserved for future extensions. Applications and drivers must set
the array to zero.
.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{7.7cm}|
.. _v4l2-subdev-mbus-code-flags:
.. flat-table:: Subdev Media Bus Code Enumerate Flags
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - V4L2_SUBDEV_MBUS_CODE_CSC_COLORSPACE
- 0x00000001
- The driver allows the application to try to change the default colorspace
encoding. The application can ask to configure the colorspace of the
subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
See :ref:`v4l2-mbus-format` on how to do this.
* - V4L2_SUBDEV_MBUS_CODE_CSC_XFER_FUNC
- 0x00000002
- The driver allows the application to try to change the default transform function.
The application can ask to configure the transform function of
the subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
See :ref:`v4l2-mbus-format` on how to do this.
* - V4L2_SUBDEV_MBUS_CODE_CSC_YCBCR_ENC
- 0x00000004
- The driver allows the application to try to change the default Y'CbCr
encoding. The application can ask to configure the Y'CbCr encoding of the
subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
See :ref:`v4l2-mbus-format` on how to do this.
* - V4L2_SUBDEV_MBUS_CODE_CSC_HSV_ENC
- 0x00000004
- The driver allows the application to try to change the default HSV
encoding. The application can ask to configure the HSV encoding of the
subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
See :ref:`v4l2-mbus-format` on how to do this.
* - V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION
- 0x00000008
- The driver allows the application to try to change the default
quantization. The application can ask to configure the quantization of
the subdevice when calling the :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>`
ioctl with :ref:`V4L2_MBUS_FRAMEFMT_SET_CSC <mbus-framefmt-set-csc>` set.
See :ref:`v4l2-mbus-format` on how to do this.
Return Value
============