[Bug 98695] [byt bisected] WARN_ON(!power_domains->domain_use_count[domain])

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98695

--- Comment #8 from yann <yann.argotti at intel.com> ---
(In reply to yann from comment #7)
> (In reply to Matwey V. Kornilov from comment #6)
> > (In reply to yann from comment #4)
> > > (In reply to Chris Wilson from comment #3)
> > > > commit a781ce79d51fc4952870c998937980a042927e84
> > > > Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > > Date:   Fri Nov 27 18:55:25 2015 +0200
> > > > 
> > > >     drm/i915: Clean up AUX power domain handling
> > > >     
> > > >     Introduce intel_display_port_aux_power_domain() which simply returns
> > > >     the appropriate AUX power domain for a specific port, and then replace
> > > >     the intel_display_port_power_domain() with calls to the new function
> > > >     in the DP code. As long as we're not actually enabling the port we don't
> > > >     need the lane power domains, and those are handled now purely from
> > > >     modeset_update_crtc_power_domains().
> > > >     
> > > >     My initial motivation for this was to see if I could keep the DPIO power
> > > >     wells powered down while doing AUX on CHV, but turns out I can't so this
> > > >     doesn't change anything for CHV at least. But I think it's still a
> > > >     worthwile change.
> > > 
> > > Matwey, please re-test with latest drm-intel-nightly
> > > (https://cgit.freedesktop.org/drm-intel/) and confirm that is now fixed also
> > > on your side.
> > 
> > Ok, I will do. Should I pay extra attention to the specific commit which you
> > believe fix the issue.
> 
> The goal is to have a version where that commit is merged. If you take
> latest drm-intel-nightly, for instance, you should be safe because it
> already merged in that branch

Matwev, seeing Jani's comment #5, don't re-test since this is the commit that
introduced regression (sorry my bad here).

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