[Intel-gfx] Need help to root cause IGD driver issue on xen.

[G.R.]

On Tue, Dec 11, 2012 at 11:38 AM, G.R. <firemeteor at users.sourceforge.net>wrote:

>
> On Tue, Dec 11, 2012 at 6:12 AM, Jesse Barnes <jbarnes at virtuousgeek.org>wrote:
>
>>
>> Hm, yeah in the full HVM case we don't bring up the panel fitter and
>> the transcoder fails to come up, which would definitely cause trouble.
>>
>> 3.2.31 is pretty old though, can you reproduce this with a newer
>> kernel?  Tons of fixes have landed since then, and many of them aren't
>> suitable for 3.2.x due to their invasiveness.
>>
>
FYI: I just checked the i915_drv.c in 3.6.5 kernel.
It's basically the same code as I've seen in 3.2.31, just adding the
LynxPoint recognition.
So I believe magic for PVHVM are hidden elsewhere.


>
>> And can I ask you to file a bug for this issue so it doesn't get lost?
>> bugs.freedesktop.org (see intellinuxgraphics.org for bug filing
>> instructions).
>>
>> Thanks,
>> --
>> Jesse Barnes, Intel Open Source Technology Center
>>
>
> Thanks for your suggestion, Jesse.
> But I'm not yet convinced that it's a intel driver issue.
> See my analysis in the xen-dev list.
> http://lists.xen.org/archives/html/xen-devel/2012-12/msg00855.html
>
> It seems that the PCI hierarchy presented in the HVM does not match the
> expectation of intel_detect_pch() function.
> The problem is that the PVHVM version also shares the same layout, but the
> driver actually works.
> That's what confuses me most. So far have no idea how to explain such
> difference in behavior.
>
> Thanks,
> Timothy
>
>
>
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