regression on raven (gmc9)

[Alex Deucher]

On Mon, Apr 2, 2018 at 7:17 AM, Tom St Denis <tstdenis at amd.com> wrote:
> This commit
>
> [root at raven linux]# git bisect bad
> c704d7a15d292e6e222b7e990ed7e9f41617cdd8 is the first bad commit
> commit c704d7a15d292e6e222b7e990ed7e9f41617cdd8
> Author: Alex Deucher <alexander.deucher at amd.com>
> Date:   Tue Mar 27 17:10:56 2018 -0500
>
>     drm/amdgpu/gmc9: use amdgpu_ring_emit_reg_write_reg_wait in gpu tlb
> flush
>
>     Use amdgpu_ring_emit_reg_write_reg_wait.  On engines that support it,
>     it provides a write and wait in a single packet which avoids a missed
>     ack if a world switch happens between the request and waiting for the
>     ack.
>
>     Reviewed-by: Huang Rui <ray.huang at amd.com>
>     Reviewed-by: Christian König <christian.koenig at amd.com>
>     Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
>
> :040000 040000 a08a12a316d09ea231337136cc7aa076d4da44a8
> 521c8a18b0c63e185e416a267619a92822d7f268 M      drivers
>
> Causes my raven1 to lockup on starting X with a gfx ring stall.

I've reverted the patches.

Alex

>
> Tom
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