https://bugzilla.kernel.org/show_bug.cgi?id=203471
--- Comment #13 from Haxk20 (haxk612@gmail.com) --- (In reply to Michel Dänzer from comment #12)
(In reply to vr00m from comment #11)
ICYMI, I was able to solve the tearing problem with raven ridge using iommu=soft boot param.
Tearing isn't related to the IOMMU. Scatter/gather scanout support for Raven Ridge is landing now, maybe you're running a development snapshot kernel which has it already?
Could you please point us to the patch series that implements scatter/gather scanout support for Raven Ridge ? I havent found it in rc4 nor in drm-next-5.4
Thank you.