DP_AUX_CH_CTL_MANCHESTER_TEST 1470 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_AUX_CH_CTL_MANCHESTER_TEST	    (1 << 14)
DP_AUX_CH_CTL_MANCHESTER_TEST 5555 drivers/gpu/drm/i915/i915_reg.h #define   DP_AUX_CH_CTL_MANCHESTER_TEST	    (1 << 14)