Can you confirm this issue is/is-not relevant any more on either of:-
* Debian Bullseye (testing)
* Debian Buster (stable) with the backported version of kernel
(5.10.0-0.bpo.7) installed.
Amdgpu has improved a long way since the time this bug report was
created, and would be good to get the bug closed or issue forwarded
upstream if still relevant.
--simon