PP_REFERENCE_DIVIDER_MASK  200 drivers/gpu/drm/gma500/psb_intel_reg.h #define  PP_REFERENCE_DIVIDER_MASK	(0xffffff00)
PP_REFERENCE_DIVIDER_MASK 4773 drivers/gpu/drm/i915/i915_reg.h #define  PP_REFERENCE_DIVIDER_MASK	REG_GENMASK(31, 8)