linux-kernel - Re: [PATCH 3/4] platform/chrome: cros_ec_typec: Configure muxes at start of port update

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Message-ID: <YgM1pjwN2MHaMQCJ@google.com>
Date:   Wed, 9 Feb 2022 11:31:50 +0800
From:   Tzung-Bi Shih <tzungbi@...gle.com>
To:     Prashant Malani <pmalani@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        "open list:CHROMEOS EC USB TYPE-C DRIVER" 
        <chrome-platform@...ts.linux.dev>
Subject: Re: [PATCH 3/4] platform/chrome: cros_ec_typec: Configure muxes at
 start of port update

On Tue, Feb 08, 2022 at 02:58:51PM -0800, Prashant Malani wrote:
> On Tue, Feb 8, 2022 at 10:35 AM Prashant Malani <pmalani@...omium.org> wrote:
> > In general, I think you may benefit from reading:
> > - The entire cros_ec_typec driver
> > - The EC Type C state machine [2] and interfaces [3][4]
> >
> > The above 2 will help understand how this entire stack works. Without
> > it, it is challenging
> > to process the flow (just from code review).
> >
> > If you have further questions our would like to better understand the
> > drivers, feel free to reach
> > out to me over IM/email. I don't think public list code review is the
> > best option for this
> > sort of explanation.
> >
> > [1] https://elixir.bootlin.com/linux/latest/source/drivers/platform/chrome/cros_ec_typec.c#L549
> > [2] https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/platform/ec/common/usbc/
> > [3] https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/platform/ec/driver/usb_mux/usb_mux.c
> > [4] https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/platform/ec/common/usb_pd_host_cmd.c

Thanks for the link pointers.  It would take me some time to understand the
background for reviewing the patch though.

But in general, I would suggest to change the title for a stronger signal
that it fixes something (per [1]).  Otherwise, the title and the description
in cover letter looks like a move refactor.

[1]: https://patchwork.kernel.org/project/chrome-platform/patch/20220207214026.1526151-4-pmalani@chromium.org/#24727676