PV_VCONTROL_VIDEN
CRTC_READ(PV_V_CONTROL) & ~PV_VCONTROL_VIDEN);
ret = wait_for(!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN), 1);
if (!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN))
CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN);