Verified linux-oem-6.11/6.11.0-1025.25 on AMD Strix CRB.
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https://bugs.launchpad.net/bugs/2112582
Title:
HW accelerated video playback causes VCN timeout on VCN 4.0.5 (AMD
Strix)
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.11 package in Ubuntu:
Invalid
Status in linux-oem-6.14 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Invalid
Status in linux-oem-6.11 source package in Noble:
Fix Committed
Status in linux-oem-6.14 source package in Noble:
Fix Committed
Status in linux source package in Oracular:
In Progress
Status in linux-oem-6.11 source package in Oracular:
Invalid
Status in linux-oem-6.14 source package in Oracular:
Invalid
Status in linux source package in Plucky:
Fix Committed
Status in linux-oem-6.11 source package in Plucky:
Invalid
Status in linux-oem-6.14 source package in Plucky:
Invalid
Status in linux source package in Questing:
Fix Released
Status in linux-oem-6.11 source package in Questing:
Invalid
Status in linux-oem-6.14 source package in Questing:
Invalid
Bug description:
[SRU Justification]
[ 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
07c9db090b86e5211188e1b351303fbc673378cf ("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.
========== original bug report ==========
Upstream bug: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12528
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
07c9db090b86e5211188e1b351303fbc673378cf ("drm/amdgpu: read back
register after written for VCN v4.0.5").
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