The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* fi-icl-u4: igt@kms_chamelium@dp-link-status - fail - Failed assertion: false, Timed out waiting for DP-3 to get connected
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_366/fi-icl-u4/igt@kms_chamelium@dp-link-status.html

A CI Bug Log filter associated to this bug has been updated:

{- fi-icl-u4: igt@kms_chamelium@dp-link-status - fail - Failed assertion: false, Timed out waiting for DP-3 to get connected -}
{+ fi-icl-u4: igt@kms_chamelium@dp-link-status - fail - Failed assertion: false, Timed out waiting for DP-3 to get connected +}

New failures caught by the filter:

  * https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_366/fi-icl-u4/igt@kms_chamelium@hdmi-mode-timings.html
  * https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_366/fi-icl-u4/igt@kms_chamelium@hdmi-aspect-ratio.html

A CI Bug Log filter associated to this bug has been updated:

{- fi-icl-u4: igt@kms_chamelium@dp-link-status - fail - Failed assertion: false, Timed out waiting for DP-3 to get connected -}
{+ fi-icl-u4: igt@kms_chamelium@dp-link-status - fail - Failed assertion: false, Timed out waiting for DP-3 to get connected +}

New failures caught by the filter:

  * https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_367/fi-icl-u4/igt@kms_chamelium@dp-mode-timings.html

I think the reason for all machines connected to Chamelium is pretty simple here: for each of the tests, initially it resets the Chamelium with chamelium_reset function and then waits for connector to come up meanwhile probing it. Sometimes HOTPLUG_TIMEOUT which is 20s is not enough so we time out even though it is visible from dmesg that connector comes up eventually:

7> [488.306978] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3] disconnected
<7> [488.357307] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3]
<7> [488.357435] [drm:intel_dp_detect [i915]] [CONNECTOR:245:DP-3]
<7> [488.357804] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3] disconnected
<7> [488.408154] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3]
<7> [488.408282] [drm:intel_dp_detect [i915]] [CONNECTOR:245:DP-3]
<7> [488.408395] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3] disconnected
<7> [488.458595] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3]
<7> [488.458725] [drm:intel_dp_detect [i915]] [CONNECTOR:245:DP-3]
<7> [488.458910] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3] disconnected
<7> [488.509272] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3]
<7> [488.509399] [drm:intel_dp_detect [i915]] [CONNECTOR:245:DP-3]
<7> [488.509509] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:245:DP-3] disconnected
<6> [488.579246] [IGT] kms_chamelium: exiting, ret=98


So we exit with error however connector comes up just a second later:

<7> [489.397551] [drm:i915_hotplug_work_func [i915]] Connector DP-3 (pin 8) received hotplug event.
<7> [489.407519] [drm:icl_tc_phy_set_safe_mode [i915]] Port E/TC#3: PHY complete clear timed out
<7> [489.407613] [drm:__intel_tc_port_lock [i915]] Port E/TC#3: TC port mode reset (dp-alt -> dp-alt)
<7> [489.413700] [drm:intel_power_well_disable [i915]] disabling power well 3
<7> [489.413774] [drm:intel_power_well_disable [i915]] disabling power well 2
<7> [489.413853] [drm:intel_atomic_commit_tail [i915]] [CRTC:152:pipe B]
<7> [489.413950] [drm:intel_enable_sagv [i915]] Enabling SAGV
<7> [489.414176] [drm:intel_dp_detect [i915]] [CONNECTOR:245:DP-3]
...
<7> [489.594446] [drm:intel_encoder_hotplug [i915]] [CONNECTOR:245:DP-3] status updated from disconnected to connected

So the solution I guess is to simply increase the HOTPLUG_TIMEOUT value up to 30 seconds as I looks like Chamelium restart time varies.

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You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/intel/issues/414.