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media: v4l: ctrls: add a control for flash/strobe duration

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Add a V4L2_CID_FLASH_DURATION control to set the duration of a
flash/strobe pulse. This controls the length of the flash/strobe pulse
output by device (typically a camera sensor) and connected to the flash
controller. This is different to the V4L2_CID_FLASH_TIMEOUT control,
which is implemented by the flash controller and defines a limit after
which the flash is "forcefully" turned off again.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Richard Leitner <richard.leitner@linux.dev>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Richard Leitner 2025-12-09 23:44:36 +01:00 committed by Hans Verkuil
parent 59b9548e50
commit d89ccbf3dd
2 changed files with 2 additions and 0 deletions
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1
drivers/media/v4l2-core/v4l2-ctrls-defs.c
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@ -1135,6 +1135,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_FLASH_FAULT: return "Faults";
case V4L2_CID_FLASH_CHARGE: return "Charge";
case V4L2_CID_FLASH_READY: return "Ready to Strobe";
case V4L2_CID_FLASH_DURATION: return "Strobe Duration";
/* JPEG encoder controls */
/* Keep the order of the 'case's the same as in v4l2-controls.h! */

1
include/uapi/linux/v4l2-controls.h
View File

@ -1192,6 +1192,7 @@ enum v4l2_flash_strobe_source {
#define V4L2_CID_FLASH_CHARGE (V4L2_CID_FLASH_CLASS_BASE + 11)
#define V4L2_CID_FLASH_READY (V4L2_CID_FLASH_CLASS_BASE + 12)
#define V4L2_CID_FLASH_DURATION (V4L2_CID_FLASH_CLASS_BASE + 13)
/* JPEG-class control IDs */