PANEL_LIGHT_OFF_DELAY_MASK  196 drivers/gpu/drm/gma500/psb_intel_reg.h #define PANEL_LIGHT_OFF_DELAY_MASK	(0x1fff)
PANEL_LIGHT_OFF_DELAY_MASK 4769 drivers/gpu/drm/i915/i915_reg.h #define  PANEL_LIGHT_OFF_DELAY_MASK	REG_GENMASK(12, 0)