diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_link_training.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index b35af21a2761..bc5215eb84b1 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -1429,7 +1429,11 @@ intel_dp_128b132b_link_train(struct intel_dp *intel_dp, void intel_dp_start_link_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + struct intel_connector *connector = intel_dp->attached_connector; + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; bool passed; + /* * TODO: Reiniting LTTPRs here won't be needed once proper connector * HW state readout is added. @@ -1447,6 +1451,26 @@ void intel_dp_start_link_train(struct intel_dp *intel_dp, else passed = intel_dp_link_train_all_phys(intel_dp, crtc_state, lttpr_count); + /* + * Ignore the link failure in CI + * + * In fixed enviroments like CI, sometimes unexpected long HPDs are + * generated by the displays. If ignore_long_hpd flag is set, such long + * HPDs are ignored. And probably as a consequence of these ignored + * long HPDs, subsequent link trainings are failed resulting into CI + * execution failures. + * + * For test cases which rely on the link training or processing of HPDs + * ignore_long_hpd flag can unset from the testcase. + */ + if (!passed && i915->display.hotplug.ignore_long_hpd) { + drm_dbg_kms(&i915->drm, + "[CONNECTOR:%d:%s][ENCODER:%d:%s] Ignore the link failure\n", + connector->base.base.id, connector->base.name, + encoder->base.base.id, encoder->base.name); + return; + } + if (!passed) intel_dp_schedule_fallback_link_training(intel_dp, crtc_state); } |