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From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Kyle Tso <kyletso@google.com>
Cc: linux@roeck-us.net, gregkh@linuxfoundation.org,
	badhri@google.com, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org, lkp@intel.com
Subject: Re: [PATCH v2 2/2] usb: typec: tcpm: Respond Not_Supported if no snk_vdo
Date: Mon, 24 May 2021 13:22:37 +0300	[thread overview]
Message-ID: <YKt+bbgOVi/3RCpQ@kuha.fi.intel.com> (raw)
In-Reply-To: <20210523015855.1785484-3-kyletso@google.com>

On Sun, May 23, 2021 at 09:58:55AM +0800, Kyle Tso wrote:
> If snk_vdo is not populated from fwnode, it implies the port does not
> support responding to SVDM commands. Not_Supported Message shall be sent
> if the contract is in PD3. And for PD2, the port shall ignore the
> commands.
> 
> Fixes: 193a68011fdc ("staging: typec: tcpm: Respond to Discover Identity commands")
> Signed-off-by: Kyle Tso <kyletso@google.com>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>

Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
>  drivers/usb/typec/tcpm/tcpm.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 7db6ae3e9c0b..a56bc71f4eb5 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -2458,7 +2458,10 @@ static void tcpm_pd_data_request(struct tcpm_port *port,
>  					   NONE_AMS);
>  		break;
>  	case PD_DATA_VENDOR_DEF:
> -		tcpm_handle_vdm_request(port, msg->payload, cnt);
> +		if (tcpm_vdm_ams(port) || port->nr_snk_vdo)
> +			tcpm_handle_vdm_request(port, msg->payload, cnt);
> +		else if (port->negotiated_rev > PD_REV20)
> +			tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
>  		break;
>  	case PD_DATA_BIST:
>  		port->bist_request = le32_to_cpu(msg->payload[0]);
> -- 
> 2.31.1.818.g46aad6cb9e-goog

-- 
heikki

      reply	other threads:[~2021-05-24 10:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-23  1:58 [PATCH v2 0/2] Fix some VDM AMS handling Kyle Tso
2021-05-23  1:58 ` [PATCH v2 1/2] usb: typec: tcpm: Properly interrupt VDM AMS Kyle Tso
2021-05-24 10:22   ` Heikki Krogerus
2021-05-23  1:58 ` [PATCH v2 2/2] usb: typec: tcpm: Respond Not_Supported if no snk_vdo Kyle Tso
2021-05-24 10:22   ` Heikki Krogerus [this message]

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