LP_DATA_FIFO_HALF_EMPTY 973 drivers/gpu/drm/gma500/psb_intel_reg.h #define LP_DATA_FIFO_HALF_EMPTY (1 << 9) LP_DATA_FIFO_HALF_EMPTY 10828 drivers/gpu/drm/i915/i915_reg.h #define LP_DATA_FIFO_HALF_EMPTY (1 << 9)