https://bugs.freedesktop.org/show_bug.cgi?id=92974
--- Comment #12 from charlie bug0xa3d2@hushmail.com --- Both patches ("disable_gen3.diff" and "fiji_disable_pcie_dpm.diff") applied independently of each other work. The kernel boots normally and X starts normally.
These commands were issued before each *.diff was applied and compiled: "git clean -dxf ; git fetch --all ; git reset --hard origin/amdgpu-powerplay"