linux-kernel - Re: USB-C DisplayPort display failing to stay active with Intel Barlow Ridge USB4 controller, power-management related issue?

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Message-ID: <20241115132022.GC3187799@black.fi.intel.com>
Date: Fri, 15 Nov 2024 15:20:22 +0200
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: Aaron Rainbolt <arainbolt@...cus.org>
Cc: YehezkelShB@...il.com, michael.jamet@...el.com,
	andreas.noever@...il.com, linux-usb@...r.kernel.org,
	mmikowski@...cus.org, linux-kernel@...r.kernel.org,
	Gil Fine <gil.fine@...ux.intel.com>
Subject: Re: USB-C DisplayPort display failing to stay active with Intel
 Barlow Ridge USB4 controller, power-management related issue?

Hi,

On Thu, Nov 14, 2024 at 10:41:25AM -0600, Aaron Rainbolt wrote:
> This is production hardware (specifically Clevo's X370SNW1-G and
> X370SNV1-G laptops), available for purchase from Sager, XOTICPC,
> Schenker, likely many other resellers, and our own website
> at https://kfocus.org/spec/spec-m2.html (with a tool that allows users
> to work around the bug). The firmware is baked into the hardware
> provided to us by our ODM, and for the sake of stability we do not
> modify any firmware on the machines with the exception of applying BIOS
> updates provided to us directly by the ODM. They appear to get
> their firmware directly from Clevo.

Okay thanks.

> We have requested an updated BIOS from the ODM. If one is available, we
> will upgrade and run the tests again.

Yes, I hope you can get the firmwares. The one you have now is not
"production quality" firmare so you should not really have that there in
the first place and Clevo should definitely provide you an upgrade. Note
this is separate from the BIOS. But your BIOS has issue too regarding
the USB4 power contract that is required by Microsoft so I would expect
that you should get that one upgraded too.

The patch I shared earlier should deal with all the other cases except
that weird one where we do not seem to get unplugs (and the resource is
available) which is not how the firmware is expected to work. I was
planning to submit it upstream after some more validation on our end,
probably afer v6.13-rc1 is released. I'll CC you.

If/when you get the new firmare I would definitely appreciate if your
folks could give it a try.