Hi, 
kernel - drm-next-4.9-wip + drm/amdgpu: disable CRTCs before teardown
mesa,libdrm,amdgpu,llvm form git/svn
This is not regression, this happened since dpm is workable. 

GPU/VM faults appears in the menu, benchmark and gameplay as well but not
always. 
One of trigger I found in gameplay is compfire. 

Probably this problem doesn't performance impact, frame rate is the same as for
radeon.