AMD E8860 on PowerPC with u-boot (T2080)

[Bas Vermeulen]

On Wed, Feb 21, 2018 at 10:14 AM, Christian König <
ckoenig.leichtzumerken at gmail.com> wrote:

> Am 21.02.2018 um 10:06 schrieb Michel Dänzer:
>
>> 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.
>>>
>>
> Well this list is certainly the right place to ask :)


That's what I was hoping for :)


>
> 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.
>>
>
> Could be, but IIRC we load all the firmware first then initialize things
> and then do the ring tests when we try to start the rings.
>
> BTW: What driver are you using? radeon or amdgpu?


This is a south-island or sea-island chip, so using radeon.


>
> 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.
>>
>
> Maybe also open a bug report to attach the dmesg, see bugs.freedesktop.org
> .
>

Sure. What project does the radeon driver fall under? I couldn't find the
right category under Mesa, not sure what
to file it under.

Bas Vermeulen
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