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

[Sanath S <sanaths2@amd.com>]

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).
Any other comments, we can take it on v3.
> Okay thanks!
>
>> Any luck from your end ?
> I did not have time to try it out yet unfortunately.