[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 #74 from Azhar <azhar.shaikh at intel.com> ---
(In reply to Ville Syrjala from comment #73)
> Pushed a few more things to 
> git://github.com/vsyrjala/linux.git double_buffer_ctl_simple_2
> 
> cd7a3f1a64c7 ("write wm/buf_cfg regs when writing other plane regs")
> 0374055ebfdd ("clear upper half of ggtt and point all disabled planes there")
> 64bb19816a10 ("fix schedule_timeout vs. spinlock")
> dd26b543fec6 ("disable LP1+ watermarks")
> 
> Please test again. If supposedly disabled planes remain on this time we
> should get getting fault errors in dmesg from the irq handler.

After applying above patches I was able to reproduce the issue once, but was
not able to collect the logs.

I have re-started the test again to get the dmesg logs with default log level.

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