DBI_FIFO_EMPTY    981 drivers/gpu/drm/gma500/psb_intel_reg.h #define DBI_FIFO_EMPTY				(1 << 27)
DBI_FIFO_EMPTY   10820 drivers/gpu/drm/i915/i915_reg.h #define  DBI_FIFO_EMPTY					(1 << 27)