linux-kernel - Re: [PATCH v2 5/8] usb: typec: Use Thunderbolt 3 cable discover mode VDO in Enter

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Message-ID: <CACeCKaf6ErEdzcWAXU_1ES63za8GunFgWfOnhiJOowY3iYA6UQ@mail.gmail.com>
Date:   Tue, 17 Nov 2020 16:44:27 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     Utkarsh Patel <utkarsh.h.patel@...el.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:USB NETWORKING DRIVERS" <linux-usb@...r.kernel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Rajmohan Mani <rajmohan.mani@...el.com>,
        Azhar Shaikh <azhar.shaikh@...el.com>
Subject: Re: [PATCH v2 5/8] usb: typec: Use Thunderbolt 3 cable discover mode
 VDO in Enter_USB message

On Tue, Nov 17, 2020 at 1:16 PM Prashant Malani <pmalani@...omium.org> wrote:
>
> Hi Utkarsh,
>
> On Fri, Nov 13, 2020 at 12:25:00PM -0800, Utkarsh Patel wrote:
> > USB4 also uses same cable properties as Thunderbolt 3 so use Thunderbolt 3
> > cable discover mode VDO to fill details such as active cable plug link
> > training and cable rounded support.

On digging into the Cros EC code further, sounds like active cable
link training and cable rounded are necessarily only part of
cables that have a TBT cable VDO, so sounds like the approach in the
patch is fine.

Sorry for the noise.

Best regards,

-Prashant