Re: [PATCH] xhci: Apply XHCI_RESET_TO_DEFAULT quirk to ADL-N

[Reka Norman]

On Thu, Oct 27, 2022 at 5:11 PM Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Thu, Oct 27, 2022 at 04:34:07PM +1100, Reka Norman wrote:
> > ADL-N systems have the same issue as ADL-P, where a large boot firmware
> > delay is seen if USB ports are left in U3 at shutdown. So apply the
> > XHCI_RESET_TO_DEFAULT quirk to ADL-N as well.
> >
> > This patch depends on "xhci: Add quirk to reset host back to default
> > state at shutdown".
>
> What is the git commit id of that change?

It hasn't been merged in mainline yet, only in the xhci tree:
https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/commit/?id=feb0b04b09c82589af65c84398b7d3fefaa7b7ac&head=for-usb-linus
Should I add the commit id from there? Or add the lore link?

>
> And is this needed in stable kernels?  If so, how far back?

Sorry, I'm not sure how to answer that properly.
It looks like most ADL-N support was added starting from 5.16.
The issue it fixes is a ~20s boot delay in the specific case of booting from S5.
It probably makes sense for it to go wherever the ADL-P patch goes.

>
> thanks,
>
> greg k-h