[BAT] igt@kms_chamelium@common-hpd-after-suspend caused *ERROR* failed to enable link training

Submitted by Jani Saarinen

Assigned to Petri Latvala

Link to original bug (#102505)

Description

On one of the CI systems igt@chamelium@common-hpd-after-suspend caused link error failure.

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3023/fi-kbl-7500u/igt@chamelium@common-hpd-after-suspend.html

Out
rtcwake: wakeup from "mem" using /dev/rtc0 at Thu Aug 31 18:45:56 2017
rtcwake: wakeup from "mem" using /dev/rtc0 at Thu Aug 31 18:46:08 2017
IGT-Version: 1.19-g5ce65a9a (x86_64) (Linux: 4.13.0-rc7-CI-CI_DRM_3023+ x86_64)
Test requirement not met in function require_connector_present, file chamelium.c:90:
Test requirement: found
No port of type HDMI-A was found
Test requirement not met in function require_connector_present, file chamelium.c:90:
Test requirement: found
No port of type VGA was found
Subtest common-hpd-after-suspend: SUCCESS (8.051s)
Environment
PIGLIT_SOURCE_DIR="/opt/igt/piglit" PIGLIT_PLATFORM="mixed_glx_egl"
Command
/opt/igt/tests/chamelium --run-subtest common-hpd-after-suspend
Dmesg
[ 47.584421] Suspending console(s) (use no_console_suspend to debug)
[ 47.962821] IRQ 136: no longer affine to CPU1
[ 47.982329] IRQ 121: no longer affine to CPU2
[ 47.982333] IRQ 122: no longer affine to CPU2
[ 47.982336] IRQ 124: no longer affine to CPU2
[ 47.982345] IRQ 127: no longer affine to CPU2
[ 47.982354] IRQ 130: no longer affine to CPU2
[ 47.999454] IRQ 8: no longer affine to CPU3
[ 47.999464] IRQ 9: no longer affine to CPU3
[ 47.999472] IRQ 120: no longer affine to CPU3
[ 47.999481] IRQ 125: no longer affine to CPU3
[ 48.006538] cache: parent cpu1 should not be sleeping
[ 48.008168] cache: parent cpu2 should not be sleeping
[ 48.009768] cache: parent cpu3 should not be sleeping
[ 48.642335] done.
[ 51.980541] Suspending console(s) (use no_console_suspend to debug)
[ 52.241578] cache: parent cpu1 should not be sleeping
[ 52.243203] cache: parent cpu2 should not be sleeping
[ 52.244787] cache: parent cpu3 should not be sleeping
[ 54.414773] [drm:intel_dp_start_link_train [i915]] ERROR failed to enable link training
[ 54.747735] done.

Relation to https://bugs.freedesktop.org/show_bug.cgi?id=102359 but due to different environment (chamelium) not dupping yet...

fi-kbl-7500u HD Graphics 620 / GT2 HDMI, mDP->Chamelium