+static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
+{
+ memset(ev->reserved, 0, sizeof(ev->reserved));
+ ev->type = V4L2_EVENT_CTRL;
+ ev->id = ctrl->id;
+ ev->u.ctrl.changes = changes;
+ ev->u.ctrl.type = ctrl->type;
+ ev->u.ctrl.flags = ctrl->flags;
+ if (ctrl->type == V4L2_CTRL_TYPE_STRING)
+ ev->u.ctrl.value64 = 0;
+ else
+ ev->u.ctrl.value64 = ctrl->cur.val64;
+ ev->u.ctrl.minimum = ctrl->minimum;
+ ev->u.ctrl.maximum = ctrl->maximum;
+ if (ctrl->type == V4L2_CTRL_TYPE_MENU)
+ ev->u.ctrl.step = 1;
+ else
+ ev->u.ctrl.step = ctrl->step;
+ ev->u.ctrl.default_value = ctrl->default_value;
+}
+
+static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
+{
+ struct v4l2_event ev;
+ struct v4l2_subscribed_event *sev;
+
+ if (list_empty(&ctrl->ev_subs))
+ return;
+ fill_event(&ev, ctrl, changes);
+
+ list_for_each_entry(sev, &ctrl->ev_subs, node)
+ if (sev->fh && sev->fh != fh)
+ v4l2_event_queue_fh(sev->fh, &ev);
+}
+