[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 #66 from Azhar <azhar.shaikh at intel.com> ---
(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.

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