path: root/Documentation
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authorRicardo Ribalda Delgado <ribalda@kernel.org>2019-10-07 12:06:34 -0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-10-10 11:38:02 -0300
commit3f0a700624d0a4014998b2ed5c1f964aa1b784a6 (patch)
tree915daca552e2b96bdb45928b50d915d7fea0730f /Documentation
parent61fd036d01111679b01e4b92e6bd0cdd33809aea (diff)
media: Documentation: media: Describe V4L2_CID_UNIT_CELL_SIZE
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>
Diffstat (limited to 'Documentation')
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
index 2c3ab5796d76..2d3e2b83d6dd 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
@@ -55,3 +55,13 @@ Image Source Control IDs
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.

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