https://bugs.freedesktop.org/show_bug.cgi?id=108542
--- Comment #9 from Nicholas Kazlauskas nicholas.kazlauskas@amd.com --- 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:
https://cgit.freedesktop.org/~agd5f/linux