reproduce (this is a W=1 build):
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f amd-staging-drm-next
        git checkout 585279e00796a46da19b64d5a131c3b5facab8bc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/