Re: [PATCH v3] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges

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On Mon, Oct 21, 2019 at 1:40 PM Mika Westerberg
<mika.westerberg@xxxxxxxxx> wrote:
>
> Hi Karol,
>
> Sorry for commenting late, I just came back from vacation.
>
> On Wed, Oct 16, 2019 at 04:44:49PM +0200, Karol Herbst wrote:
> > Fixes state transitions of Nvidia Pascal GPUs from D3cold into higher device
> > states.
> >
> > v2: convert to pci_dev quirk
> >     put a proper technical explanation of the issue as a in-code comment
> > v3: disable it only for certain combinations of intel and nvidia hardware
> >
> > Signed-off-by: Karol Herbst <kherbst@xxxxxxxxxx>
> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > Cc: Lyude Paul <lyude@xxxxxxxxxx>
> > Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
> > Cc: Mika Westerberg <mika.westerberg@xxxxxxxxx>
> > Cc: linux-pci@xxxxxxxxxxxxxxx
> > Cc: linux-pm@xxxxxxxxxxxxxxx
> > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > Cc: nouveau@xxxxxxxxxxxxxxxxxxxxx
> > ---
> >  drivers/pci/pci.c    | 11 ++++++++++
> >  drivers/pci/quirks.c | 52 ++++++++++++++++++++++++++++++++++++++++++++
>
> I may be missing something but why you can't do this in the nouveau
> driver itself?

What do you mean precisely? Move the quirk into nouveau, but keep the
changes to pci core?
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