[PATCH] drm/amdgpu: add a workaround for GDS ordered append hangs with compute queues

[Marek Olšák]

On Mon, Feb 4, 2019 at 7:42 AM Christian König <
ckoenig.leichtzumerken at gmail.com> wrote:

> At least from coding style, backward compatibility etc.. this looks sane
> to me, so feel free to add an Acked-by.
>
> But I absolutely can't judge if that is correct from the hardware point of
> view or not.
>

Our GDS docs say that writing the register resets the wave counter.


>
> And I think that somebody else looking at this is mandatory for it to be
> committed.
>

There won't be anybody else. Nobody here really understands GDS, nobody
here really cares about GDS, and hw guys weren't helpful with the hangs. If
I didn't discover this by luck, GDS OA would be unusable on Linux.

Marek
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