Few tests - dmesg-fail/dmesg-warn/incomplete - *ERROR* Link Training Unsuccessful
This issue is split from #585 (closed) https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5537/re-tgl-u2/igt@kms_atomic_transition@plane-all-transition.html
<7> [507.589967] i915 0000:00:02.0: [drm:intel_dp_start_link_train [i915]] [CONNECTOR:301:DP-2] Link Training failed at link rate = 162000, lane count = 1
<3> [507.590071] [drm:intel_dp_get_link_train_fallback_values [i915]] *ERROR* Link Training Unsuccessful
https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5537/re-tgl-u2/igt@kms_available_modes_crc@available_mode_test_crc.html https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8083/re-tgl-u2/igt@i915_pm_rpm@gem-pread.html