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 :)
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?
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.
Regards,
Christian.
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