On Thu Aug 7 17:11:32 2025 +0300, Sakari Ailus wrote:
> 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 <[email protected]>
> Reviewed-by: Jacopo Mondi <[email protected]>
> Reviewed-by: Mirela Rabulea <[email protected]>
> Reviewed-by: Laurent Pinchart <[email protected]>
Patch committed.
Thanks,
Sakari Ailus
include/media/v4l2-subdev.h | 8 ++++++++
1 file changed, 8 insertions(+)
---
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index d256b7ec8f84..d9dca6905b33 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -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,
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