SDVO_CMD_SET_BRIGHTNESS  650 drivers/gpu/drm/gma500/psb_intel_sdvo_regs.h #define SDVO_CMD_SET_BRIGHTNESS				0x5d
SDVO_CMD_SET_BRIGHTNESS  661 drivers/gpu/drm/i915/display/intel_sdvo_regs.h #define SDVO_CMD_SET_BRIGHTNESS				0x5d