if (dev->pdev->device == 0x0174 || dev->pdev->device == 0x0179 ||
dev->pdev->device == 0x0189 || dev->pdev->device == 0x0329) {
if (mode == DRM_MODE_DPMS_ON) {
- nv_mask(device, NV_PBUS_DEBUG_DUALHEAD_CTL, 0, 1 << 31);
+ nv_mask(device, NV_PBUS_DEBUG_DUALHEAD_CTL, 1 << 31, 1 << 31);
nv_mask(device, NV_PCRTC_GPIO_EXT, 3, 1);
} else {
nv_mask(device, NV_PBUS_DEBUG_DUALHEAD_CTL, 1 << 31, 0);