* [PATCH v11 6/8] Documentation: media: Describe V4L2_CID_UNIT_CELL_SIZE
@ 2019-10-07 12:25 Ricardo Ribalda Delgado
0 siblings, 0 replies; only message in thread
From: Ricardo Ribalda Delgado @ 2019-10-07 12:25 UTC (permalink / raw)
To: Philipp Zabel, Hans Verkuil, Jacopo Mondi, linux-media, linux-kernel
Cc: Ricardo Ribalda Delgado
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>
---
.../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.
--
2.23.0
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