On Tue, 2011-03-08 at 13:00 +0100, Michel Dänzer wrote:
> On Die, 2011-03-08 at 07:30 +1100, Benjamin Herrenschmidt wrote:
> > On Mon, 2011-03-07 at 10:45 +0100, Michel Dänzer wrote:
> > >
> > > I've been using radeon KMS on my PowerBook ever since I got it working
> > > initially about 1.5 years ago and fixing issues as time permits.
> > >
> > > The major outstanding issues I'm aware of are:
> > >
> > > * The uninorth AGP driver doesn't allow AGP transfer rates beyond
> > > 1x to work reliably with KMS. Benjamin Herrenschmidt (CC'd) was
> > > working on a fix for this, any progress Ben?
> >
> > I have hacks.
>
> FWIW, I've been using the hack at the end of this mail for AGP >1x.
.../...
Ok I'll try to give it another go here one of these days, I think I
still have some of my old hacks too.
Cheers,
Ben.
> > But I never got it working reliably. In fact, on the laptop I have
> > here, even with PCI GART, it's still unstable if I use KMS/DRI2.
>
> I know your PowerBook was affected by the problem fixed by commit
> b7d8cce5b558e0c0aa6898c9865356481598b46d ('drm/radeon/kms: MC vram map
> needs to be >= pci aperture size'), which went into 2.6.37. Still no
> better with that?
>
>
> > > * Come to think of it, the OFfb handover probably only works for
> > > me thanks to a patch "drm/radeon: Add early unregister of
> > > firmware fb's" by BenH. Ben/Dave, what's the status of that?
> >
> > Dave ? Was this ever merged ?
>
> Apparently it went into 2.6.37, I didn't notice because it went into
> different places in the code compared to the patch I had from you.
>
>
> > > * Various endianness issues in the Mesa drivers.
> >
> > Right, and the later aren't getting any better :-( It's busted even
> > without KMS nowadays.
> >
> > Unfortunately, I have about 0 time to spend on that at the moment.
> >
> > I recommend that distros stick to radeonfb + UMS for the time being on
> > ppc32.
>
> One problem being that the classic Mesa r300 driver is essentially
> unmaintained, and evidently rotting....
>
>
> commit 9a86d7fa5bb0b4fe228becf9ed9831bac985702c
> Author: Michel Dänzer <daen...@vmware.com>
> Date: Thu Jan 6 18:34:28 2011 +0100
>
> agp/uninorth: Fix lockups with radeon KMS and >1x.
>
> diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
> index f845a8f..a32c492 100644
> --- a/drivers/char/agp/uninorth-agp.c
> +++ b/drivers/char/agp/uninorth-agp.c
> @@ -80,7 +80,7 @@ static void uninorth_tlbflush(struct agp_memory *mem)
> ctrl | UNI_N_CFG_GART_INVAL);
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, ctrl);
>
> - if (uninorth_rev <= 0x30) {
> + if (!mem && uninorth_rev <= 0x30) {
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
> ctrl | UNI_N_CFG_GART_2xRESET);
> pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
>
>
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