media: Documentation: Add ST VGXY61 driver documentation

Document V4L2_CID_HDR_MODE possible values for this sensor.

Signed-off-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
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Benjamin Mugnier 2022-10-11 14:30:29 +02:00 committed by Sakari Ailus
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.. SPDX-License-Identifier: GPL-2.0
ST VGXY61 camera sensor driver
==============================
The ST VGXY61 driver implements the following controls:
``V4L2_CID_HDR_SENSOR_MODE``
-------------------------------
Change the sensor HDR mode. A HDR picture is obtained by merging two captures of the same scene
using two different exposure periods.
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* - HDR linearize
- The merger outputs a long exposure capture as long as it is not saturated.
* - HDR substraction
- This involves subtracting the short exposure frame from the long exposure frame.
* - "No HDR"
- This mode is used for standard dynamic range (SDR) exposures.