Re: [Patch v2 2/2] thunderbolt: Teardown tunnels and reset downstream ports created by boot firmware

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On 1/5/2024 12:38 PM, Mika Westerberg wrote:
On Thu, Jan 04, 2024 at 07:20:05PM +0530, Sanath S wrote:
On 1/3/2024 10:47 PM, Mika Westerberg wrote:
On Wed, Jan 03, 2024 at 07:45:56PM +0530, Sanath S wrote:
On 12/21/2023 3:23 PM, Mika Westerberg wrote:
On Thu, Dec 21, 2023 at 03:01:50PM +0530, Sanath S wrote:
Sure. I'll check with these combinations.
Can you name any docks that meets these requirements ? I'll try to get
hold of it here and check.
Pretty much every Titan Ridge based dock. For instance Dell WD19TB.

I have some hardware here that I can use to try it out too.
It seems that issue is seen on Dell WD19TB too. So this fix may have to
extended to TBT3 as well ?
Hm, what issue? I thought this works accross all the supported devices
due to the DFP, no?

I'll give it a try this week and share the observation.
Got my hands on Dell WD19TB. And it works!

Here is lspci -t output with and without fix

without fix:
            +-03.1-[04-62]----00.0-[05-07]--+-02.0-[06]----00.0
            |                               \-04.0-[07]--
With fix:
            +-03.1-[04-62]----00.0-[05-62]--+-02.0-[06]----00.0
            |                               \-04.0-[07-62]--

I'll send out v3 with with splitting into 2/3 patches(Will see how it looks
good).
Okay and you checked also that with the WD19TB (and its integrated xHCI)
there are no additional boot delays because of the reset?
I did not observe any delays. As now we are not doing any discover as well before resetting.
It was ready to use as soon as I see login screen.
Any other comments, we can take it on v3.
Sure.
I've sent v3.




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