SDVO_CMD_GET_MAX_CONTRAST  617 drivers/gpu/drm/gma500/psb_intel_sdvo_regs.h #define SDVO_CMD_GET_MAX_CONTRAST			0x5e
SDVO_CMD_GET_MAX_CONTRAST  628 drivers/gpu/drm/i915/display/intel_sdvo_regs.h #define SDVO_CMD_GET_MAX_CONTRAST			0x5e