dispc_vp_go_busy
if (WARN_ON(dispc_vp_go_busy(tidss->dispc, tcrtc->hw_videoport)))
busy = dispc_vp_go_busy(tidss->dispc, tcrtc->hw_videoport);
bool dispc_vp_go_busy(struct dispc_device *dispc, u32 hw_videoport);