[Bug 62373] [snb rc6] 2.21.3, Linux 3.8.1, SNA: hard lockup when watching videos with MPlayer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62373

--- Comment #15 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to Chris Wilson from comment #13)
> Implemented the bspec recommendation:
> 
> commit d247cb7d0cdb73736f31612157e47f166af68ba0
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Mon Dec 8 10:07:25 2014 +0000
> 
>     sna/gen6: Poke PSMI control around WAIT_FOR_EVENT to prevent idling
>     
>     The bspec recommends preventing the hardware from going to sleep around
>     a WAIT_FOR_EVENT, and tells us to use disable sleep bit in PSMI control
>     to accomplish this.
>     
>     References: https://bugs.freedesktop.org/show_bug.cgi?id=62373
>     Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> 
> It's worth another go...

OK so not my bug but with a baytrail J1900N this does not prevent a vaapi hard
lock (probably when de-interlacing h/w or s/w so fps = refresh) for me.

I only recently started seeing locks - turns out that dri3 was OK for me, but
of course it then got disabled by default and I started getting locks.

This is with kodi - it seems they recommend 910 as the last stable driver - and
I can lock with 311.

This was tested with head on this commit, kernel nightly and mesa about a week
old.

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