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media: Improve enable_streams and disable_streams documentation

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Document that enable_streams may start additional streams and
disable_streams may not disable requested streams if other related streams
are still enabled.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Sakari Ailus 2025-08-07 17:11:32 +03:00
parent c4b1944b56
commit 96298497e1
1 changed files with 8 additions and 0 deletions
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8
include/media/v4l2-subdev.h
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@ -814,6 +814,11 @@ struct v4l2_subdev_state {
* V4L2_SUBDEV_CAP_STREAMS sub-device capability flag can ignore the mask
* argument.
*
* Due to device constraints, starting the requested streams may result in
* additional streams also being started by the driver. Streams that are
* started and stopped together due to the nature of the hardware are
* called a stream group.
*
* @disable_streams: Disable the streams defined in streams_mask on the given
* source pad. Subdevs that implement this operation must use the active
* state management provided by the subdev core (enabled through a call to
@ -823,6 +828,9 @@ struct v4l2_subdev_state {
* Drivers that support only a single stream without setting the
* V4L2_SUBDEV_CAP_STREAMS sub-device capability flag can ignore the mask
* argument.
*
* When the requested stream are part of a stream group, they will be
* stopped once all streams in the group are stopped.
*/
struct v4l2_subdev_pad_ops {
int (*enum_mbus_code)(struct v4l2_subdev *sd,