DP_VOLTAGE_1_2   1391 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_VOLTAGE_1_2		(3 << 25)
DP_VOLTAGE_1_2   5438 drivers/gpu/drm/i915/i915_reg.h #define   DP_VOLTAGE_1_2		(3 << 25)