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Date: Tue, 21 May 2024 08:11:51 +0300
From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Gia <giacomo.gio@gmail.com>
Cc: Benjamin =?utf-8?Q?B=C3=B6hmke?= <benjamin@boehmke.net>,
	Mario Limonciello <mario.limonciello@amd.com>,
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	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
	"S, Sanath" <Sanath.S@amd.com>
Subject: Re: [REGRESSION][BISECTED] "xHCI host controller not responding,
 assume dead" on stable kernel > 6.8.7
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In-Reply-To: <CAHe5sWazL96zPa-v9S515ciE46JLZ1ROL7gmGikfn-vhUoDaZg@mail.gmail.com>

Hi,

On Mon, May 20, 2024 at 07:30:28PM +0200, Gia wrote:
> In my case I use the official Thunderbolt cable that came with my
> CalDigit TS3 Plus and yet the log - attached in a previous email -
> says current link speed 10.0 Gb/s. I just tried a good quality USB4
> cable too and nothing changed.

I will take a look at your logs today but in the meantime can you run
following command on the system with the dock connected?

  # tbdump -r 0 -a 1 -vv -N 2 LANE_ADP_CS_0

Here tbdump comes from https://github.com/intel/tbtools. It should be
pretty straighforward to build but let me know if any issues
(unfortunately there is no binary package available at this time).

The '-a 1' should match the adapter the dock is connected. You can get
it for instance like this (this is an example from my system):

  # tblist
  Domain 0 Route 0: 8087:7eb2 Intel Gen14
  Domain 0 Route 1: 003d:0011 CalDigit, Inc. TS3 Plus
  Domain 1 Route 0: 8087:7eb2 Intel Gen14

Here the CalDigit has "Route 1" so it means I use "-a 1" above. It could
be also "Domain 0 Route 3" in which case replace the "-a 1" with "-a 3".

This command should dump two lane adapter registers LANE_ADP_CS_0/1 that
show the link capabilities.