diff options
Diffstat (limited to 'include/media/v4l2-event.h')
| -rw-r--r-- | include/media/v4l2-event.h | 36 |
1 files changed, 1 insertions, 35 deletions
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h index 6741910c3a18..17833e886e11 100644 --- a/include/media/v4l2-event.h +++ b/include/media/v4l2-event.h @@ -24,40 +24,6 @@ #include <linux/videodev2.h> #include <linux/wait.h> -/* - * Overview: - * - * Events are subscribed per-filehandle. An event specification consists of a - * type and is optionally associated with an object identified through the - * 'id' field. So an event is uniquely identified by the (type, id) tuple. - * - * The v4l2-fh struct has a list of subscribed events. The v4l2_subscribed_event - * struct is added to that list, one for every subscribed event. - * - * Each v4l2_subscribed_event struct ends with an array of v4l2_kevent structs. - * This array (ringbuffer, really) is used to store any events raised by the - * driver. The v4l2_kevent struct links into the 'available' list of the - * v4l2_fh struct so VIDIOC_DQEVENT will know which event to dequeue first. - * - * Finally, if the event subscription is associated with a particular object - * such as a V4L2 control, then that object needs to know about that as well - * so that an event can be raised by that object. So the 'node' field can - * be used to link the v4l2_subscribed_event struct into a list of that - * object. - * - * So to summarize: - * - * struct v4l2_fh has two lists: one of the subscribed events, and one of the - * pending events. - * - * struct v4l2_subscribed_event has a ringbuffer of raised (pending) events of - * that particular type. - * - * If struct v4l2_subscribed_event is associated with a specific object, then - * that object will have an internal list of struct v4l2_subscribed_event so - * it knows who subscribed an event to that object. - */ - struct v4l2_fh; struct v4l2_subdev; struct v4l2_subscribed_event; @@ -218,7 +184,7 @@ int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_event_subscription *sub); /** * v4l2_src_change_event_subscribe - helper function that calls - * v4l2_event_subscribe() if the event is %V4L2_EVENT_SOURCE_CHANGE. + * v4l2_event_subscribe() if the event is %V4L2_EVENT_SOURCE_CHANGE. * * @fh: pointer to struct v4l2_fh * @sub: pointer to &struct v4l2_event_subscription |