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Subject: media: Documentation: media: Describe V4L2_CID_UNIT_CELL_SIZE
Author: Ricardo Ribalda Delgado <riba...@kernel.org>
Date: Mon Oct 7 12:06:34 2019 -0300
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.za...@pengutronix.de>
Signed-off-by: Ricardo Ribalda Delgado <riba...@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
Documentation/media/uapi/v4l/ext-ctrls-image-source.rst | 10 ++++++++++
1 file changed, 10 insertions(+)
---
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
``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.
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