AMD E8860 on PowerPC with u-boot (T2080)

[Christian König]

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 
> <mailto: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.

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

>
>             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 <http://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.

Christian.

>
> Bas Vermeulen

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