AMD E8860 on PowerPC with u-boot (T2080)

[Bas Vermeulen]

On Wed, Feb 21, 2018 at 10:06 AM, Michel Dänzer <michel at daenzer.net> wrote:

> On 2018-02-21 09:49 AM, Bas Vermeulen wrote:
> > Hi,
> >
> > I am unsure if this is the right place to ask, but it seems relevant.
> >
> > I am trying to use an AMD E8860 (SI) board connected to an E6500 PowerPC
> > board (T2080RDB from NXP).
> > The T2080RDB does not use a BIOS, and uses u-boot to bootstrap Linux.
> >
> > I have the E8860 connected to a PCIe x4 slot with an adapter. The kernel
> > is a 4.1, with DRM included in the kernel and the radeon as a module.
> > The radeon driver detects the card, notices the BIOS hasn't posted and
> > starts things up.
> > After that, the ring tests get run, and fails on the ring 0 test,
> > disabling acceleration. The graphics card is (or seems to be) working
> > apart from that, the driver starts up and sees the connectors on the
> board.
> >
> > When I compare dmesg on an x86 machine and the PPC machine, I see that
> > the x86 machine loads a lot more firmware from the kernel (probably the
> > acceleration parts?).
>
> FWIW, that's probably just a subsequent symptom due to the ring test
> failure.
>

Gotcha.


> > My question is, what do I need to do to correctly initialize the E8860
> > board on my powerpc machine?
>
> Start by sharing the dmesg output, and maybe also the kernel build
> configuration file.
>

Both are attached (gzipped because of size).

The card gets initialized of a sorts, and there are no PCIE errors (using a
slightly different
setup for the PCIe controllers in my device-tree for the board results in
PCIe errors being thrown).

Bas Vermeulen
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