PLL_P2_DIVIDE_BY_4  255 drivers/gpu/drm/gma500/psb_intel_reg.h #define PLL_P2_DIVIDE_BY_4		(1 << 23)	/* i830, required
PLL_P2_DIVIDE_BY_4 3323 drivers/gpu/drm/i915/i915_reg.h #define   PLL_P2_DIVIDE_BY_4		(1 << 23)