LP_CTRL_FIFO_EMPTY  980 drivers/gpu/drm/gma500/psb_intel_reg.h #define LP_CTRL_FIFO_EMPTY			(1 << 26)
LP_CTRL_FIFO_EMPTY 10821 drivers/gpu/drm/i915/i915_reg.h #define  LP_CTRL_FIFO_EMPTY				(1 << 26)