Using kernel 5.15.13 with firmware linux-firmware-20201023.dae4b4c-1-any.pkg.tar.zst the radeontop show normal usage of memory clock (50-53%) using Xorg amdgpu. With update 5.15.14 stuck 100% using or not Xorg. I am using this old firmware because is the only that works fine with amdgpu and not stuck at 100%. The latest firmware 20211216.f682ecb-1 too fails and stuck 100%, with 5.15.14, 5.15.13 and 5.16 CPU Ryzen 2 3200U Lenovo Ideapad L340-15-API
Please post here https://gitlab.freedesktop.org/drm/amd/-/issues