[Bug 70570] [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70570

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #4 from Imre Deak <imre.deak at gmail.com> ---
(In reply to comment #3)
> (In reply to comment #1)
> > Created attachment 92023 [details] [review] [review]
> > don't disable DP port during hot unplug
> > 
> > I hit the same WARN by first unplugging the DP cable and then doing an
> > xrandr --off. The problem is that that during the modeset the driver tries
> > to disable the already disabled DP port. One solution would be to leave the
> > port enabled during the unplug event handling and only disable it during the
> > subsequent modeset.
> > 
> > The attach patch does this, could you try it?
> 
> This bug still can be reproduce with the patch, please check the dmesg "Call
> trace with patch" for details, thanks.

This looks like a separate issue, could you provide a dmesg with drm.debug=0xe
set?

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