AMD E8860 on PowerPC with u-boot (T2080)

[Bas Vermeulen]

On Wed, Feb 21, 2018 at 10:31 AM, Christian König <christian.koenig at amd.com>
wrote:

> Am 21.02.2018 um 10:23 schrieb 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.
>
>
> Well SI is also supported by amdgpu, I would give that a try as well.
>

Didn't know that,


> And BTW please try a more recent kernel as well, 4.1 is rather old.
>

Somewhat easier said than done; it's an NXP board, and they only supply 4.1
at the moment.
I'll see if I can upgrade to 4.15.x.


>
>
>
>
>>
>> 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.
>
>
> Product DRI and then select DRM/Radeon as component.
>

Gotcha.

Bas Vermeulen
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