DP_TEST_REQUEST 617 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c DP_TEST_REQUEST, DP_TEST_REQUEST 2327 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c DP_TEST_REQUEST, DP_TEST_REQUEST 4665 drivers/gpu/drm/i915/display/intel_dp.c status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_REQUEST, &request);