[Bug 70570] [BYT] igt/kms_flip/wf_vblank-vs-modeset causes WARNING: intel_dp.c:2653 intel_dp_link_down()

[bugzilla-daemon at freedesktop.org]

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

Guo Jinxian <jinxianx.guo at intel.com> changed:

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

--- Comment #9 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #7)
> (In reply to comment #6)
> > (In reply to comment #4)
> > > (In reply to comment #3)
> > > > (In reply to comment #1)
> > > > > Created attachment 92023 [details] [review] [review] [review] [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?
> > 
> > Please check "dmesg with drm.debug=0xe" in attachment, thanks.
> 
> Do you run the test on an external monitor or is it an embedded panel?
> 
> The beginning of the log is missing, could you boot with drm.debug=14
> log_buf_len=16M and send a log including the bootup messages too?

It's an embedded panel.
Please check "dmesg with drm.debug=14 log_buf_len=16M" in attachment. Thanks.

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