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media: Documentation: media: Describe V4L2_CID_UNIT_CELL_SIZE

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New control to pass to userspace the width/height of a pixel. Which is
needed for calibration and lens selection.

Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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Ricardo Ribalda Delgado 2019-10-07 12:06:34 -03:00 committed by Mauro Carvalho Chehab
parent 61fd036d01
commit 3f0a700624
1 changed files with 10 additions and 0 deletions
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10
Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
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@ -55,3 +55,13 @@ Image Source Control IDs
``V4L2_CID_TEST_PATTERN_GREENB (integer)``
Test pattern green (next to blue) colour component.
``V4L2_CID_UNIT_CELL_SIZE (struct)``
This control returns the unit cell size in nanometers. The struct
:c:type:`v4l2_area` provides the width and the height in separate
fields to take into consideration asymmetric pixels.
This control does not take into consideration any possible hardware
binning.
The unit cell consists of the whole area of the pixel, sensitive and
non-sensitive.
This control is required for automatic calibration of sensors/cameras.