[Bug 103369] [CI] igt at kms_* fail - igt-kms-WARNING: connector 76/eDP-1 has no modes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103369

Imre Deak <imre.deak at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #50 from Imre Deak <imre.deak at intel.com> ---
The link training probably fails because it's from a retraining scheduled from
intel_hpd_init() after runtime resume, which races with a modeset doing a
normal link training. Not sure exactly how the retraining fails, perhaps simply
the AUX writes for the training sequence are somehow interleaved. In any case
it's bogus to do the retraining since the link is down at that point. The race
itself is assumed to be fixed by

commit 42e5e65765265485ecf2a480c244d76c2c624449
Author:     Daniel Vetter <daniel.vetter at ffwll.ch>
AuthorDate: Mon Nov 13 17:01:40 2017 +0100
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Thu Nov 23 14:59:07 2017 +0100

    drm/i915: sync dp link status checks against atomic commmits

As for the fallback DP lane and rate limit values there is the following patch
which fell through the cracks, I'll merge it:

https://lists.freedesktop.org/archives/intel-gfx/2017-October/142766.html
[Intel-gfx] [PATCH v2] drm/i915/edp: Do not do link training fallback or prune
modes on EDP

Thanks to Ville to pointing to these commits.

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