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Message-Id: <20191007113502.11746-7-ribalda@kernel.org>
Date: Mon, 7 Oct 2019 13:35:00 +0200
From: Ricardo Ribalda Delgado <ribalda@...nel.org>
To: Philipp Zabel <p.zabel@...gutronix.de>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Jacopo Mondi <jacopo@...ndi.org>, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Ricardo Ribalda Delgado <ribalda@...nel.org>
Subject: [PATCH v10 6/8] 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@...gutronix.de>
Signed-off-by: Ricardo Ribalda Delgado <ribalda@...nel.org>
---
Documentation/media/uapi/v4l/ext-ctrls-image-source.rst | 9 +++++++++
1 file changed, 9 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..6388668855d0 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst
@@ -55,3 +55,12 @@ 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 and/or 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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