https://bugs.freedesktop.org/show_bug.cgi?id=107784
--- Comment #5 from Michel Dänzer michel@daenzer.net --- (In reply to Sylvain BERTRAND from comment #4)
faulty commit: 019cddc88f9e4ae0de2c76802f7137210c2101aa on amd-staging-drm-next
That's a pure merge commit, so it's unlikely to be the one that actually caused the problem.
Without a plausible bisection result or at least usable backtraces in dmesg, no progress can be made here.