BACKLIGHT_MODULATION_FREQ_MASK   94 drivers/gpu/drm/gma500/psb_intel_reg.h #define BACKLIGHT_MODULATION_FREQ_MASK	(0x7fff << 17)
BACKLIGHT_MODULATION_FREQ_MASK 4856 drivers/gpu/drm/i915/i915_reg.h #define   BACKLIGHT_MODULATION_FREQ_MASK	(0x7fff << 17)