Re: snd-cmipci oops during probe on arm64 (current mainline, pre-6.6-rc1)

Geraldo Nascimento
2023-09-06T21:00:14Z

On Wed, Sep 06, 2023 at 09:37:18PM +0100, Robin Murphy wrote:
>
> Bit bigger than a Pi... ;)
>

Ohh, that's impressive indeed!

But looking around with Google, it turns out the Altra Ampere PCIe is
definitely quirky, see:

https://lore.kernel.org/linux-acpi/20200806225525.GA706347@bjorn-Precision-5520/T/
https://github.com/Tencent/TencentOS-kernel/commit/f454797b673c06c0eb1b77be20d8a475ad2fbf6f

The first quirk should probably be activated on Antonio's kernel but the
second one being a downstream Tencent patch, isn't. Alas, the second
quirk comes with a performance hit, see:

https://gitlab.freedesktop.org/drm/amd/-/issues/2078

Thanks,
Geraldo Nascimento