Messages in this thread | | | Date | Tue, 06 Sep 2022 17:52:34 +0200 | From | Takashi Iwai <> | Subject | Re: [REGRESSION 5.19.x] AMD HD-audio devices missing on 5.19 |
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On Tue, 06 Sep 2022 17:41:51 +0200, Jason Gunthorpe wrote: > > On Tue, Aug 23, 2022 at 05:28:24PM -0300, Jason Gunthorpe wrote: > > On Tue, Aug 23, 2022 at 01:46:36PM +0200, Takashi Iwai wrote: > > > It was tested now and confirmed that the call path is via AMDGPU, as > > > expected: > > > amdgpu_pci_probe -> > > > amdgpu_driver_load_kms -> > > > amdgpu_device_init -> > > > amdgpu_amdkfd_device_init -> > > > kgd2kfd_device_init -> > > > kgd2kfd_resume_iommu -> > > > kfd_iommu_resume -> > > > amd_iommu_init_device -> > > > iommu_attach_group -> > > > __iommu_attach_group > > > > Oh, when you said sound intel I thought this was an Intel CPU.. > > > > Yes, there is this hacky private path from the amdgpu to > > the amd iommu driver that makes a mess of it here. We discussed it in > > this thread: > > > > https://lore.kernel.org/linux-iommu/YgtuJQhY8SNlv9%2F6@8bytes.org/ > > > > But nobody put it together that it would be a problem with this. > > > > Something like this, perhaps, but I didn't check if overriding the > > type would cause other problems. > > Takashi, do we want to do this patch?
I really have no much preference regarding the fix for this regression from my side. If you can work on it, it'd be greatly appreciated.
thanks,
Takashi
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