Re: Question about commit 8cf9926c537c (thunderbolt: Reset only non-USB4 host routers in resume)

[Jayi Li]

在 2025/12/30 15:24, Mika Westerberg 写道:
> Hi,
>
> On Thu, Dec 25, 2025 at 03:22:29PM +0800, Jayi Li wrote:
> > Hi Mika,
> >
> > Sorry to bother. I have a question about the above commit that I couldn't
> > figure out, and I'd really appreciate it if you could help.
> >
> > The commit message says: "There is no need to reset the USB4 host routers on
> > resume because they are reset already."But aside from `nhi_probe`,
> >
> > I haven't found where this reset occurs in the resume path. Could you please
> > clarify where this automatic reset happens or the rationale behind it?
> It's done when the router enters Sleep state so there is no need to do
> reset on the SW side.

I see, so the firmware performs a reset when entering sleep. Thank you 
for your reply.