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media: v4l: ctrls: Add a control for HDR mode

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Add V4L2_CID_HDR_MODE as a menu item control to set the HDR mode of the
sensor, and its documentation.
Menu items are not standardized as they differ for each sensors.

Signed-off-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
This commit is contained in:
Benjamin Mugnier 2022-10-11 14:16:02 +02:00 committed by Sakari Ailus
parent 48f750e25a
commit 7673f3058b
3 changed files with 12 additions and 0 deletions
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8
Documentation/userspace-api/media/v4l/ext-ctrls-camera.rst
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@ -661,3 +661,11 @@ enum v4l2_scene_mode -
.. [#f1]
This control may be changed to a menu control in the future, if more
options are required.
``V4L2_CID_HDR_SENSOR_MODE (menu)``
Change the sensor HDR mode. A HDR picture is obtained by merging two
captures of the same scene using two different exposure periods. HDR mode
describes the way these two captures are merged in the sensor.
As modes differ for each sensor, menu items are not standardized by this
control and are left to the programmer.

2
drivers/media/v4l2-core/v4l2-ctrls-defs.c
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@ -1043,6 +1043,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_UNIT_CELL_SIZE: return "Unit Cell Size";
case V4L2_CID_CAMERA_ORIENTATION: return "Camera Orientation";
case V4L2_CID_CAMERA_SENSOR_ROTATION: return "Camera Sensor Rotation";
case V4L2_CID_HDR_SENSOR_MODE: return "HDR Sensor Mode";
/* FM Radio Modulator controls */
/* Keep the order of the 'case's the same as in v4l2-controls.h! */
@ -1370,6 +1371,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_STATELESS_H264_START_CODE:
case V4L2_CID_CAMERA_ORIENTATION:
case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE:
case V4L2_CID_HDR_SENSOR_MODE:
*type = V4L2_CTRL_TYPE_MENU;
break;
case V4L2_CID_LINK_FREQ:

2
include/uapi/linux/v4l2-controls.h
View File

@ -1019,6 +1019,8 @@ enum v4l2_auto_focus_range {
#define V4L2_CID_CAMERA_SENSOR_ROTATION (V4L2_CID_CAMERA_CLASS_BASE+35)
#define V4L2_CID_HDR_SENSOR_MODE (V4L2_CID_CAMERA_CLASS_BASE+36)
/* FM Modulator class control IDs */
#define V4L2_CID_FM_TX_CLASS_BASE (V4L2_CTRL_CLASS_FM_TX | 0x900)