Comment # 10 on bug 1208938 from Martti Laaksonen

Tested with kernel-default-6.2.6-1.1.gfa1a4c6 from Kernel:stable repo.
Seems to work ok without amd_iommu=off kernel parameter.

However, with 6.2.6 kernel I did notice this error(?) in the kernel boot
messages:

[    9.413585] bender kernel: kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    9.413642] bender kernel: amdgpu: sdma_bitmap: 3
[    9.443769] bender kernel: memmap_init_zone_device initialised 524288 pages
in 4ms
[    9.443784] bender kernel: amdgpu: HMM registered 2048MB device memory
[    9.443872] bender kernel: kfd kfd: amdgpu: Failed to resume IOMMU for
device 1002:15d8
[    9.444071] bender kernel: kfd kfd: amdgpu: device 1002:15d8 NOT added due
to errors


With 6.1.12 kernel that error is not present:
[    8.604973] bender kernel: kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    8.605032] bender kernel: amdgpu: sdma_bitmap: 3
[    8.632249] bender kernel: memmap_init_zone_device initialised 524288 pages
in 4ms
[    8.632266] bender kernel: amdgpu: HMM registered 2048MB device memory
[    8.632419] bender kernel: amdgpu: Topology: Add APU node [0x15d8:0x1002]
[    8.632425] bender kernel: kfd kfd: amdgpu: added device 1002:15d8