linux-kernel - Re: [PATCH] usb: typec: tcpm: Ignore Vsafe0v in PR_SWAP_SNK_SRC_SOURCE

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Message-ID: <CAPTae5KaCiXEOdNY-Ct3a0uaCDd8onmtM_bSaGzy0fkooJMC1g@mail.gmail.com>
Date:   Tue, 15 Jun 2021 10:45:42 -0700
From:   Badhri Jagan Sridharan <badhri@...gle.com>
To:     Kyle Tso <kyletso@...gle.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        USB <linux-usb@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: typec: tcpm: Ignore Vsafe0v in PR_SWAP_SNK_SRC_SOURCE_ON
 state

On Tue, Jun 15, 2021 at 10:32 AM Kyle Tso <kyletso@...gle.com> wrote:
>
> In PR_SWAP_SNK_SRC_SOURCE_ON state, Vsafe0v is expected as well so do
> nothing here to avoid state machine going into SNK_UNATTACHED.
>
> Fixes: 28b43d3d746b ("usb: typec: tcpm: Introduce vsafe0v for vbus")
> Signed-off-by: Kyle Tso <kyletso@...gle.com>
Reviewed-by: Badhri Jagan Sridharan <badhri@...gle.com>
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 197556038ba4..e11e9227107d 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -5212,6 +5212,7 @@ static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
>                 }
>                 break;
>         case PR_SWAP_SNK_SRC_SINK_OFF:
> +       case PR_SWAP_SNK_SRC_SOURCE_ON:
>                 /* Do nothing, vsafe0v is expected during transition */
>                 break;
>         default:
> --
> 2.32.0.272.g935e593368-goog
>