CRT_HOTPLUG_MONITOR_MONO  396 drivers/gpu/drm/gma500/psb_intel_reg.h #define CRT_HOTPLUG_MONITOR_MONO	(2 << 8)
CRT_HOTPLUG_MONITOR_MONO 4450 drivers/gpu/drm/i915/i915_reg.h #define   CRT_HOTPLUG_MONITOR_MONO		(2 << 8)