[Bug 104975] Delay in skl_disable_plane() causes a system freeze

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104975

--- Comment #67 from Azhar <azhar.shaikh at intel.com> ---
(In reply to Azhar from comment #66)
> (In reply to Ville Syrjala from comment #65)
> > Hmm. I wonder if we're still barking up the right tree with the DDB angle.
> > 
> > I pushed the following hack:
> > b48dad3fe322 ("hacks: fixed ddb allocation for each plane")
> > to git://github.com/vsyrjala/linux.git double_buffer_ctl_ddb_wa_hacks
> > 
> > Would be nice to know whether that fully eliminates the hang. If it doesn't
> > then we would seem to be on the wrong track.
> 
> The test has been running for more than 5 hours now, with ONLY the top
> commit "b48dad3fe322 ("hacks: fixed ddb allocation for each plane")"  on
> linux-stable 4.15.18 branch without IPC support on BXT+.
> 
> I will keep it running overnight.

There was no crash with overnight run for above configuration.

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