[Bug 111184] [CI][DRMTIP] igt at kms_flip@flip-vs-panning-vs-hang-interruptible - fail - Failed assertion: set_mode(o, o->fb_ids[o->current_fb_id], x_ofs, 0) == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111184

--- Comment #4 from Ramalingam C <ramalingam.c at intel.com> ---
fi-icl-u4 has two USB Type-C port connected to HDMI panel and DP panel and also
eDP panel is connected.

If you see the IGT assertion for set_mode() for different tests, they are
occurring when the DP4 port is tried for a modeset with different pipes.
Can see the slight sporadic in nature.
But all the time link training for DP4 is failing with dmesg like
[536.165831] [drm:intel_dp_start_link_train [i915]] [CONNECTOR:223:DP-4] Link
Training failed at link rate = 540000, lane count = 1 at
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_327/fi-icl-u4/igt@kms_flip@flip-vs-panning-vs-hang-interruptible.html

So I am suspecting this could be mostly related to the panel or the DP to HDMI
converter used here. Still, we need to figure out that there is no specific HW
at DP4 than DP3, because of which DP4 alone failing. 
And this issue is reproduced in the latest run too with the reproducing rate of
4/8 times

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