All tests - dmesg-warn - *ERROR* Timeout waiting for DDI BUF E to get active
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8822/re-tgl-u2/igt@gem_eio@in-flight-10ms.html#dmesg-warnings192
<7> [15.827259] i915 0000:00:02.0: [drm:intel_dp_print_rates [i915]] source rates: 162000, 216000, 270000, 324000, 432000, 540000, 648000, 810000
<7> [15.827288] i915 0000:00:02.0: [drm:intel_dp_print_rates [i915]] sink rates: 162000, 270000, 540000
<7> [15.827317] i915 0000:00:02.0: [drm:intel_dp_print_rates [i915]] common rates: 162000, 270000, 540000
<7> [15.828911] i915 0000:00:02.0: [drm:intel_dp_retrain_link [i915]] [ENCODER:300:DDI E] retraining link
<3> [15.829480] i915 0000:00:02.0: [drm] *ERROR* Timeout waiting for DDI BUF E to get active
<7> [15.829539] i915 0000:00:02.0: [drm:intel_dp_start_link_train [i915]] Using LINK_BW_SET value 06
<7> [15.830130] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 0
<7> [15.830159] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [15.830210] i915 0000:00:02.0: [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS1
<7> [15.863745] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [15.863827] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [15.899757] i915 0000:00:02.0: [drm:intel_dp_start_link_train [i915]] clock recovery OK
<7> [15.899876] i915 0000:00:02.0: [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS3
<7> [15.926415] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [15.926539] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [15.960492] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [15.960618] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [15.994528] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [15.994654] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [16.028500] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [16.028627] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [16.048040] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2
<7> [16.048080] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0
<7> [16.048372] [drm:intel_dp_dump_link_status [i915]] ln0_1:0x1 ln2_3:0x0 align:0x0 sink:0x0 adj_req0_1:0x22 adj_req2_3:0x22
<7> [16.048402] i915 0000:00:02.0: [drm:intel_dp_start_link_train [i915]] Channel equalization failed 5 times
<7> [16.048772] 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> [16.048774] i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
Edited by LAKSHMINARAYANA VUDUM