PFIT_HORIZ_SCALE_MASK  223 drivers/gpu/drm/gma500/psb_intel_reg.h #define PFIT_HORIZ_SCALE_MASK			0x0000fff0
PFIT_HORIZ_SCALE_MASK 4800 drivers/gpu/drm/i915/i915_reg.h #define		PFIT_HORIZ_SCALE_MASK		0x0000fff0