Re: [PATCH 00/12] Broadwell 3.14 backports

[Ben Widawsky <ben@bwidawsk.net>]

On Mon, Mar 24, 2014 at 04:14:32PM -0700, Ausmus, James wrote:
> On Sat, Mar 22, 2014 at 4:34 AM, Daniel Vetter <daniel@ffwll.ch> wrote:
> > On Fri, Mar 21, 2014 at 05:51:01PM -0700, Ben Widawsky wrote:
> >> Let's try this again. I've pushed a branch here:
> >> http://cgit.freedesktop.org/~bwidawsk/drm-intel/log/?h=bdw-backports
> >>
> >> I need to re-review some of the merge conflicts for 4g GGTT, which I
> >> will try to do before Monday.
> >>
> >> Daniel: please make sure this is what you had in mind. I don't know
> >> where you want Cc: stable tags.
> >
> > We don't need cc: stable, we just need to submit it (since it has the
> > upstream sha1s already, which is the requirement for stable patches). Cc:
> > stable is only for when you want it to get backport anyway. Otherwise
> > looks good. I dunno whether git cherry-pick can be told to use the sha1
> > reference layout Greg prefers or not, he uses "This is <sha1> in
> > upstream." between the commit header and the actual commit message. But
> > ime his scripts reformat your commit messages anyway.
> >
> >> James: please test this as soon as possible.
> >
> > Once this is tested and we conclude it's sufficient to get bdw going on
> > 3.14 without hilarity I think we should do a quick review on intel-gfx to
> > check that the impact outside of bdw is indeed minimal. Then once drm-next
> > has landed with all the referenced commits we can submit it to Greg with a
> > small cover letter why we want this and that plan B would be to kill bdw
> > in 3.14.
> 
> This seems to be working well for me, with the one caveat that on boot
> and once per resume I'm hitting the WARN(!i915_preliminary_hw_support,
> "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production") code in
> gen8_init_clock_gating - can that WARN be dropped via "drm/i915: Don't
> use i915_preliminary_hw_support to mean pre-production" ?
> 
> Both with and without that patch added, the series is:
> 
> Tested-by: James Ausmus <james.ausmus@intel.com>

Thanks.

Daniel, the patch is added to my backports branch. I think given that
that it removes a WARN which we know to be bogus, it's a good patch for
stable. But it's your call.

[snip]


-- 
Ben Widawsky, Intel Open Source Technology Center