https://bugzilla.kernel.org/show_bug.cgi?id=199319
--- Comment #16 from Harry Wentland (harry.wentland@amd.com) --- A fix should be in drm-next-4.17 of Alex's git repo at https://cgit.freedesktop.org/~agd5f/linux/?h=drm-next-4.17 and should make it into Linus's tree from there.
That fix should also make it into 4.16 stable.