DP_LINK_TRAIN_MASK 1384 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_LINK_TRAIN_MASK		(3 << 28)
DP_LINK_TRAIN_MASK 5423 drivers/gpu/drm/i915/i915_reg.h #define   DP_LINK_TRAIN_MASK		(3 << 28)