APPLIED: [PATCH 0/1][SRU][Plucky/Oracular] HW accelerated video playback causes VCN timeout on VCN 4.0.5 (AMD Strix)

[Mehmet Basaran]

Applied to plucky:linux, oracular:linux master-next branches. Thanks.

Oracular changes will not be released because series will be EOL.

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You-Sheng Yang <vicamo.yang at canonical.com> writes:

> BugLink: https://bugs.launchpad.net/bugs/2112582
>
> [ Impact ]
>
> amdgpu has functionality that will reset the GPU when a job in a ring
> buffer times out to try to recover. When this happens, the application
> submitting the job will crash and there will be a flicker for ~2s while
> the GPU recovers.
>
> Proposed fix in v6.15-rc7 as commit 07c9db090b86 ("drm/amdgpu: read back
> register after written for VCN v4.0.5").
>
> [ Test Plan ]
>
> This was originally reported in
> https://gitlab.freedesktop.org/mesa/mesa/-/issues/12528. The reproduce
> steps are:
> 1. enabled HW accelerated video decode in Firefox 134 using about:config
> 2. run video playback streams as stress test for hours.
>
> [ Where problems could occur ]
>
> The fix reads back registers to ensure a previous write has completed. No
> known problem as this moment.
>
> [ Other Info ]
>
> While this affects VCN 4.0.5 (AMD Strix Point) and the fix has been
> committed to v6.15-rc7, nominate for 6.11+ - 6.14 kernels, e.g.
> linux/oracular, linux-oem-6.11/noble, linux/plucky, linux-oem-6.14/noble.
>
> David (Ming Qiang) Wu (1):
>   drm/amdgpu: read back register after written for VCN v4.0.5
>
>  drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> -- 
> 2.48.1
>
>
> -- 
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
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