diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ctrls.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index f6ee201d9347..fa02363e7db4 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1204,6 +1204,8 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, send_event(fh, ctrl, (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); + if (ctrl->call_notify && changed && ctrl->handler->notify) + ctrl->handler->notify(ctrl, ctrl->handler->notify_priv); } } @@ -2725,6 +2727,22 @@ int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val) } EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64); +void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv) +{ + if (ctrl == NULL) + return; + if (notify == NULL) { + ctrl->call_notify = 0; + return; + } + if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify)) + return; + ctrl->handler->notify = notify; + ctrl->handler->notify_priv = priv; + ctrl->call_notify = 1; +} +EXPORT_SYMBOL(v4l2_ctrl_notify); + static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) { struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id); |