EDP_PREEMPHASIS_3_5dB  436 drivers/gpu/drm/gma500/intel_bios.h #define EDP_PREEMPHASIS_3_5dB	1
EDP_PREEMPHASIS_3_5dB  625 drivers/gpu/drm/i915/display/intel_vbt_defs.h #define EDP_PREEMPHASIS_3_5dB	1