https://bugzilla.kernel.org/show_bug.cgi?id=194559
--- Comment #5 from fin4478@hotmail.com --- (In reply to Janpieter Sollie from comment #3)
it works! attached my config file of your drm-next kernel I don't know what needs to be done for you developers to integrate drm-next into the mainline kernel, but thank you!!!
Amd should warn not use stock kernels and tell how to use use ~agd5f wip kernel and latest mesa git. Here is the page for you, dear Amd: http://support.amd.com/en-us/download/linux
This and many other amdgpu bug reports prove my point.