Regression on gfx8 with ring init

[Christian König]

Am 18.09.2018 um 15:32 schrieb Tom St Denis:
> On 2018-09-18 9:30 a.m., Christian König wrote:
>> Great, not sure if that is a good or a bad news.
>>
>> Anyway going to revert the change for now. Does anybody volunteer to 
>> figure out why interrupts sometimes doesn't work correctly on Raven?
>
> What does "doesn't work correctly?"  My workstation is a Raven1 (Ryzen 
> 2400G) and other than the TTM bulk move issue has been perfectly 
> stable (through suspend/resumes too I might add).
>
> Anything I could test with my devel raven?

The problem seems to be that on some boards IH handling doesn't work as 
it should.

Can you try to disable the onboard graphics and try again?

If that still doesn't work there is a DRM_DEBUG in amdgpu_ih_process(), 
make that a DRM_ERROR and send me the resulting dmesg of loading amdgpu 
(but don't start any UMD).

Thanks,
Christian.

>
>
> Tom
>
>>
>> Christian.
>>
>> Am 18.09.2018 um 15:27 schrieb Tom St Denis:
>>> This commit:
>>>
>>> [root at raven linux]# git bisect good
>>> 9b0df0937a852d299fbe42a5939c9a8a4cc83c55 is the first bad commit
>>> commit 9b0df0937a852d299fbe42a5939c9a8a4cc83c55
>>> Author: Christian König <christian.koenig at amd.com>
>>> Date:   Tue Sep 18 10:38:09 2018 +0200
>>>
>>>     drm/amdgpu: remove fence fallback
>>>
>>>     DC doesn't seem to have a fallback path either.
>>>
>>>     So when interrupts doesn't work any more we are pretty much 
>>> busted no
>>>     matter what.
>>>
>>>     Signed-off-by: Christian König <christian.koenig at amd.com>
>>>     Reviewed-by: Chunming Zhou <david1.zhou at amd.com>
>>>
>>> Results in this:
>>>
>>> [   24.334025] [drm] Initialized amdgpu 3.27.0 20150101 for 
>>> 0000:07:00.0 on minor 1
>>> [   24.335674] modprobe (3895) used greatest stack depth: 12600 
>>> bytes left
>>> [   26.272358] [drm:gfx_v8_0_ring_test_ib [amdgpu]] *ERROR* amdgpu: 
>>> IB test timed out.
>>> [   26.272460] [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* amdgpu: 
>>> failed testing IB on ring 9 (-110).
>>> [   26.407885] [drm:process_one_work] *ERROR* ib ring test failed 
>>> (-110).
>>> [   28.506708] fuse init (API version 7.27)
>>>
>>> On init with my polaris/raven1 system.
>>>
>>> Cheers,
>>> Tom
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>