SDVOC_PRESERVE_MASK  428 drivers/gpu/drm/gma500/psb_intel_reg.h #define SDVOC_PRESERVE_MASK		(1 << 17)
SDVOC_PRESERVE_MASK 4533 drivers/gpu/drm/i915/i915_reg.h #define   SDVOC_PRESERVE_MASK ((1 << 17) | SDVO_INTERRUPT_ENABLE)