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

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Message-ID: <20210615213920.GA969448@roeck-us.net>
Date:   Tue, 15 Jun 2021 14:39:20 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Kyle Tso <kyletso@...gle.com>
Cc:     heikki.krogerus@...ux.intel.com, gregkh@...uxfoundation.org,
        badhri@...gle.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: typec: tcpm: Ignore Vsafe0v in
 PR_SWAP_SNK_SRC_SOURCE_ON state

On Wed, Jun 16, 2021 at 01:32:06AM +0800, Kyle Tso 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: Guenter Roeck <linux@...ck-us.net>

> ---
>  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
>