LP_CTRL_FIFO_HALF_EMPTY  979 drivers/gpu/drm/gma500/psb_intel_reg.h #define LP_CTRL_FIFO_HALF_EMPTY			(1 << 25)
LP_CTRL_FIFO_HALF_EMPTY 10822 drivers/gpu/drm/i915/i915_reg.h #define  LP_CTRL_FIFO_HALF_EMPTY			(1 << 25)