uvc_ctrl_status_event
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
uvc_ctrl_status_event(chain, unit->controls, &new_val);
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
void uvc_ctrl_status_event(struct uvc_video_chain *chain,