PANEL_PORT_SELECT_MASK  185 drivers/gpu/drm/gma500/psb_intel_reg.h #define PANEL_PORT_SELECT_MASK 		(3 << 30)
PANEL_PORT_SELECT_MASK 4757 drivers/gpu/drm/i915/i915_reg.h #define  PANEL_PORT_SELECT_MASK		REG_GENMASK(31, 30)