Re: [PATCH 0/2] drm/i915: 830M regression fixes

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Tue, Jan 07, 2014 at 04:59:10PM +0000, Chris Wilson wrote:
> On Tue, Jan 07, 2014 at 04:12:06PM +0100, Thomas Richter wrote:
> > On 01/07/2014 03:15 PM, ville.syrjala@linux.intel.com wrote:
> > >From: Ville Syrjälä<ville.syrjala@linux.intel.com>
> > >
> > >Looks like I managed to break 830M in a few different ways recently. But I
> > >recently found one for myself so hopefully that'll not happen again.
> > >
> > >I have a few other things lined up for 830M, but these are the quick fixes
> > >that should get us back to the state we had before.
> > 
> > Thanks, Ville!
> > 
> > As a related note, I found that with the latest kernel, "uxa"
> > drawing of filled rectangles became very slow (and sna is still too
> > broken to be useful, sorry). Would you know which file I should look
> > into to check for something like this? The client application only
> > submits plain X11 calls, the render acceleration or composition
> > should (?) not play a role here. It's really a plain simple filled
> > rectangle (or many of them) that became notably slow.
> 
> Wtf? What's up with SNA? There's a solitary report that cache coherency
> on 830GM requires some workaround, on which I'd hoped that Daniel could
> run igt to confirm (and now perhaps Ville might fancy the challenge).
> Other than that, judging by my 845g, it should be solid.

FWIW I haven't seen any issues w/ SNA on either 830 or 855, but I must
admit that I've not done any extensive testing on either.

-- 
Ville Syrjälä
Intel OTC