https://bugs.freedesktop.org/show_bug.cgi?id=109887
--- Comment #11 from Stefan Springer stefanspr94@gmail.com --- Loading a powerplay table only temporarily alleviates the issue. It comes back after a while of desktop usage.
I think the culprit might be here: https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/amd/powerplay/...
Why set the voltage for a state to max_vddc in the first place?