Re: [3.2.y] drm/i915: add Ivy Bridge GT2 Server entries

[Chris Wilson <chris@chris-wilson.co.uk>]

On Sun, 07 Oct 2012 15:01:17 +0100, Ben Hutchings <ben@decadent.org.uk> wrote:
> On Mon, 2012-10-01 at 03:24 -0700, Jonathan Nieder wrote:
> > Hi Ben,
> > 
> > Please consider
> > 
> >   cc22a938fc1d drm/i915: add Ivy Bridge GT2 Server entries, 2012-03-29
> > 
> > for application to the 3.2.y tree.  It adds a PCI id to the i915
> > driver, making kms work.  It was applied during the 3.4-rc2 cycle, so
> > newer stable kernels don't need it.
> > 
> > Maik Zumstrull tried it[1] on top of 3.2.30 and found it to work ok
> > (thanks!).
> > 
> > Note that pre-2.4.34 versions of libdrm don't cope well with that
> > card, with or without this patch:
> [...]
> >  - with this patch, and with libdrm lacking 2.4.34~22 and 2.4.38~10,
> >    X freezes at startup.
> > 
> > "No regressions" means you probably shouldn't take this patch without
> > a safety to work around the old X userspace,
> [...]
> 
> Then this workaround is also required in mainline.  And once that's
> done, I can take both patches.

The bugs Jonathan mentions are both in userspace packages; not
recognising the existence of Bromlow, and then misprogramming it. There
are no other kernel patches required specifically for this chipset,
afaik.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre