media: staging: rkisp1: allow quantization setting by userspace on the isp source pad

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The isp entity has hardware support to force full range quantization
for YUV formats. Use the subdev CSC API to allow userspace to set the
quantization for YUV formats on the isp entity.

- The flag V4L2_SUBDEV_MBUS_CODE_CSC_QUANTIZATION is set for
YUV formats during enumeration of the isp formats on the source pad.
- The full quantization is set on YUV formats if userspace asks it
on the isp entity using the flag V4L2_MBUS_FRAMEFMT_SET_CSC.

On the capture and the resizer, the quantization is read-only
and always set to the default quantization.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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This commit is contained in:

Dafna Hirschfeld 2020-08-27 21:46:11 +02:00 • committed by Mauro Carvalho Chehab

parent 62aacfa9bf

commit 6616726907

3 changed files with 17 additions and 15 deletions

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2

drivers/staging/media/rkisp1/TODO

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10

drivers/staging/media/rkisp1/rkisp1-capture.c

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drivers/staging/media/rkisp1/rkisp1-isp.c

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