X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fmedia%2Fv4l2-ctrls.h;h=11e67562b3acb39a574ae895ae5e667a7aa9c24a;hb=250f6715a4112d6686670c5a62ceb9305da94616;hp=62e04dda22f22e3ef43132685bcd274f7615732b;hpb=313162d0b83836e2f57e51b9b8650fb4b9c396ea;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 62e04dda22f2..11e67562b3ac 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -32,6 +32,7 @@ struct video_device;
 struct v4l2_subdev;
 struct v4l2_subscribed_event;
 struct v4l2_fh;
+struct poll_table_struct;
 
 /** struct v4l2_ctrl_ops - The control operations that the driver has to provide.
   * @g_volatile_ctrl: Get a new value for this control. Generally only relevant
@@ -491,6 +492,18 @@ void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl,
 void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl,
 		struct v4l2_subscribed_event *sev);
 
+/* Can be used as a vidioc_log_status function that just dumps all controls
+   associated with the filehandle. */
+int v4l2_ctrl_log_status(struct file *file, void *fh);
+
+/* Can be used as a vidioc_subscribe_event function that just subscribes
+   control events. */
+int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
+				struct v4l2_event_subscription *sub);
+
+/* Can be used as a poll function that just polls for control events. */
+unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait);
+
 /* Helpers for ioctl_ops. If hdl == NULL then they will all return -EINVAL. */
 int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc);
 int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm);