[Intel-gfx] [PATCH] drm/i915: dump even more into the error_state

[Eugeni Dodonov]

On Wed, Feb 1, 2012 at 19:39, Chris Wilson <chris at chris-wilson.co.uk> wrote:

> On Wed,  1 Feb 2012 22:26:45 +0100, Daniel Vetter <daniel.vetter at ffwll.ch>
> wrote:
> > Chris Wilson and me have again stared at funny error states and it's
> > been pretty clear from the start that something was seriously amiss.
> > The seqnos last seen by the cpu were a few hundred behind those that
> > the gpu could have possibly emitted last before it died ...
> >
> > Chris now tracked it down (hopefully, definit verdict's still out),
> > but in hindsight we'd have found the bug by simply dumping the cpu
> > side tracking of the ring head and tail registers.
> >
> > Fix this and prevent an identical time-waster in the future.
> >
> > Because the hangs always involved semaphores in one way or another,
> > we've tried to dump the mbox registers, but couldn't find any
> > inconsistencies. Still, dump them too.
> >
> > Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Reviewed-and-wanted-by: Chris Wilson <chris at chris-wilson.co.uk>
>

Yeah!! Thanks a lot for that.

Reviewed-by: Eugeni Dodonov <eugeni.dodonov at intel.com>

-- 
Eugeni Dodonov
<http://eugeni.dodonov.net/>
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