DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT 1466 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT   20
DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT 5551 drivers/gpu/drm/i915/i915_reg.h #define   DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT   20