https://bugzilla.kernel.org/show_bug.cgi?id=207383
--- Comment #89 from Christian König (christian.koenig@amd.com) --- (In reply to mnrzk from comment #87)
Good news, I wrote a patch that fixed this bug on my machine and submitted it to the Linux kernel mailing list [1].
You should probably send it to the amd-gfx@lists.freedesktop.org mailing list as well if you haven't already done so.
I'm not an expert on the DC state stuff, so Harry or Alex need to validate this patch. But of hand it looks like a nice catch to me.
Good work :)