https://bugs.freedesktop.org/show_bug.cgi?id=108542
--- Comment #10 from davide26079@gmail.com --- (In reply to Nicholas Kazlauskas from comment #9)
The patchset from:
https://patchwork.freedesktop.org/patch/260799/
...will likely resolve this issue.
It has been merged into amd-staging-drm-next branch at:
Tried amd-staging-drm-next, it works!