EDP_PREEMPHASIS_6dB  437 drivers/gpu/drm/gma500/intel_bios.h #define EDP_PREEMPHASIS_6dB	2
EDP_PREEMPHASIS_6dB  626 drivers/gpu/drm/i915/display/intel_vbt_defs.h #define EDP_PREEMPHASIS_6dB	2