[Bug 70839] [IVB] Undocking laptop causes warning in intel_dp_link_down+0x1d2/0x210

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70839

--- Comment #3 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to comment #2)
> I think that the warnings are irrelevant in this case. I'd like to keep
> track of hot plug detection, and then not warn about the DP link being down
> as a result of hot unplug.

The dp link training code is botched since if it disables the port if it
doesn't work out. Which results in warns like yours but on some systems also in
deadlocks since the display pipe stops working when we expect it to run. The
fix is to gracefully fail the link training by simple enabling the link at
conservative settings and keep on pumping pixels into the air (like we do with
all other outputs).

The comment in dp_hotplug is simply historical bonghits.

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