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

[Daniel Vetter]

On Wed, Feb 01, 2012 at 10:23:05PM -0200, Eugeni Dodonov wrote:
> 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>
Queued for -next, thanks for the review.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48