DP_AUDIO_OUTPUT_ENABLE 1427 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_AUDIO_OUTPUT_ENABLE	(1 << 6)
DP_AUDIO_OUTPUT_ENABLE 5481 drivers/gpu/drm/i915/i915_reg.h #define   DP_AUDIO_OUTPUT_ENABLE	(1 << 6)