NV40_PMC_BACKLIGHT
if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
nvif_wr32(device, NV40_PMC_BACKLIGHT,