HDMI Audio Passthrough with RX9060XT

[devleon]

Hello everyone,

I just got a new AMD RX9060XT which I want to passthrough to a bazzite VM.
So far I was using the iGPU of my Ryzen 8600G, which worked fine after following this guide.
Essentially, I had to extract the vbios and AMDGopDriver.rom from my mainboards UEFI BIOS, enable IOMMU, add vfio kernel modules, add the correct deviceids to vfio.conf, add softdep for amdgpu and snd_hda_intel to load after vfio-pci and specify both the vbios.rom and AMDGopDriver.rom when passing through - then all worked fine.

I did the exact same process for the AMD RX9060XT, and if I only pass through the GPU, everything works fine, except I have no audio over HDMI.

Now I'm stuck on how to passthrough the HDMI audio. Where do I get the matching AMDGopDriver.rom from? If I passthrough the audio device `03:00.1` without specifying the rom driver, the VM boots, but I get no video output at all. Same happens if use the AMDGopDriver.rom I extracted from the UEFI BIOS from my mainboard - so clearly they aren't compatible.

This configuration boots and works fine:

hostpci0: 0000:03:00.0,pcie=1,romfile=vbios_RX9060XT_7590.bin,x-vga=1

This does boot, but no video output:

hostpci0: 0000:03:00.0,pcie=1,romfile=vbios_RX9060XT_7590.bin,x-vga=1
hostpci1: 0000:03:00.1,pcie=1

Same for this one:

hostpci0: 0000:03:00.0,pcie=1,romfile=vbios_RX9060XT_7590.bin,x-vga=1
hostpci1: 0000:03:00.1,pcie=1,romfile=AMDGopDriver.rom

Any idea how to get HMDI audio working? Where do I get the AMDGopDriver.rom for my GPU (Sapphire Pulse RX9060XT 16GB) from?
I tried to use UBU to extract from the full VBIOS I found, but that doesn't seem to work.

Some supplementary information:

lspci -nnk

03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:7590] (rev c0)
        Subsystem: Sapphire Technology Limited Device [1da2:a493]
        Kernel driver in use: vfio-pci
        Kernel modules: amdgpu
03:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:ab40]
        Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:ab40]
        Kernel driver in use: vfio-pci
        Kernel modules: snd_hda_intel

 

[spiner]

Exact same problem here, except to get basic video to work with my PowerColor RX 9060 XT I also have to remove the options and softdep from vfio.conf. One person on reddit mentioned having a "a startup script on the guest that detached and attached the GPU on startup in order to get HDMI audio to work" with a 7600, it could be worth having a look at that.

 

[uzumo]

I don't think vbios is necessary
I get sound from hdmi audio in my environment.
It shouldn't be that different from rx9070xt.

U

Post in thread 'GPU Passthrough For Windows 11 Not Working (kvm: vfio: Unable to power on device, stuck in D3)'

Friday at 14:53

I have been using it for several months with the following settings and have not encountered any problems.

Due to a bug in vfio, the latest kernel is required.

It is not necessary to specify vBIOS. Perhaps it is not a ROM that should be specified.
Specifying disable_idle_d3=1 will cause the problem to worsen.

There will be no problems even if you restart or shut down the virtual machine.
When the virtual machine is stopped, amdgpu is used, but when it is started, vfio-pci is used.

・intel (Please do not include unnecessary options)
sed -i '1s/$/ quiet intel_iommu=on iommu=pt...

• uzumo