Re: [PATCH v2] PCI: Avoid putting some root ports into D3 on some Ryzen chips

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On 12/17/2024 08:07, Werner Sembach wrote:

'''
Platform may hang resuming.  Upgrade your firmware or add pcie_port_pm=off to kernel command line if you have problems
'''
Yes, full log attached (kernel 6.13-rc3 one time without sudo one time with sudo)

Yes; I see it in your log.

"quirk: disabling D3cold for suspend"
On the fixed BIOS I see that line. On the unfixed BIOS it aborts the functions at "if (pm_suspend_target_state == PM_SUSPEND_ON)". Skipping the check on the unfixed BIOS it still hangs on resume.

I'm /suspecting/ you do see it, but you're having problems with another root port.

I mentioned this in my previous iterations of patches that eventually landed on that quirk, but Windows and Linux handle root ports differently at suspend time and that could be why it's exposing your BIOS bug.

If you can please narrow down which root ports actually need the quirk for your side (feel free to do a similar style to 7d08f21f8c630) I think we could land on something more narrow and upstreamable.

At a minimum what you're doing today is covering both Rembrandt and Phoenix and it should only apply to Phoenix.

I also try to find out how many devices where actually shipped with this very first BIOS version.

OK.




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