[Bug 101518] [BAT][SKL] WARNING: no modes for connector 48 when running igt at kms_setmode@basic-clone-single-crtc

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101518

--- Comment #9 from Martin Peres <martin.peres at free.fr> ---
(In reply to Manasi from comment #8)
> I see the old logs, do you have the dmesg logs for the most recent testing
> after the T12 delay fix patch went in.
> Do we still see AUX timeouts? Like I mentioned, the problem here is those
> aux timeouts. We should not have those since for an eDP panel we should
> never fail link training. These aux timeouts are putting the system in an
> unexpected state.

Sure, it should not happen, but the failure mode taken is also wrong.

Why are we pruning the mode when we are failing the enable the link training?
It should only prune a mode if it failed to perform the actual link training.

You still need to send the hotplug even though, to ask the userspace to re-do
the modeset.

And also, we should NEVER prune the last mode. It is not a problem on DP, but
it is on eDP. The quickest fix would be to never prune modes on eDP since there
is only one mode anyway.

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