DP_DP13_DPCD_REV 2774 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c DP_DP13_DPCD_REV, DP_DP13_DPCD_REV 4149 drivers/gpu/drm/i915/display/intel_dp.c if (drm_dp_dpcd_read(&intel_dp->aux, DP_DP13_DPCD_REV,