[PATCH v2 09/14] media: Document enable_streams and disable_streams behaviour

[Sakari Ailus <sakari.ailus@linux.intel.com>]

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>
---
 include/media/v4l2-subdev.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index a37d9a847196..de2684b15b96 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -814,6 +814,10 @@ struct v4l2_subdev_state {
  *	V4L2_SUBDEV_CAP_STREAMS sub-device capability flag can ignore the mask
  *	argument.
  *
+ *	Starting the requested streams may require starting additional
+ *	streams. Streams that are started together due to 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 +827,9 @@ 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.
+ *
+ *	A stream group is disabled when one or more streams in the stream
+ *	group are disabled.
  */
 struct v4l2_subdev_pad_ops {
 	int (*enum_mbus_code)(struct v4l2_subdev *sd,
-- 
2.47.3