ADV_VSYNCOFFEN
val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN);
dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);