AMDGPU error: "[drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed out!"

[Ketsui]

Hi,

I'm using the Ryzen 3200G and its iGPU, on a kernel with that patch
applied[0] and the latest linux-firmware (20210511.7685cf4-1) I'm still
getting this hang.

[0] https://git.archlinux.org/linux.git/log/?h=v5.12.8-arch1
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