TX3912_VIDEOCTRL1_ENVID
val |= (TX3912_VIDEOCTRL1_DISPON | TX3912_VIDEOCTRL1_ENVID);
val &= ~(TX3912_VIDEOCTRL1_DISPON | TX3912_VIDEOCTRL1_ENVID);
reg &= ~TX3912_VIDEOCTRL1_ENVID;
reg |= TX3912_VIDEOCTRL1_ENVID;