RFX_VIDCTRL_REG
sc->sc_ctrl[RFX_VIDCTRL_REG] &= ~RFX_VIDEO_DISABLE;
sc->sc_ctrl[RFX_VIDCTRL_REG] |= RFX_VSYNC_ENABLE;
sc->sc_ctrl[RFX_VIDCTRL_REG] |= RFX_VIDEO_DISABLE;
sc->sc_ctrl[RFX_VIDCTRL_REG] &= ~RFX_VSYNC_ENABLE;