linux-kernel - Re: [PATCH v2 2/3] usb: typec: tcpci: Add Callback to Usb Communication capable partner

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Date:   Tue, 2 Feb 2021 10:49:19 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Badhri Jagan Sridharan <badhri@...gle.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kyle Tso <kyletso@...gle.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] usb: typec: tcpci: Add Callback to Usb
 Communication capable partner

On Mon, Feb 01, 2021 at 04:31:00PM -0800, Badhri Jagan Sridharan wrote:
> The USB Communications Capable bit indicates if port
> partner is capable of communication over the USB data lines
> (e.g. D+/- or SS Tx/Rx). TCPM passes this information for chip specific
> operations.
> 
> Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tcpm/tcpci.c | 9 +++++++++
>  drivers/usb/typec/tcpm/tcpci.h | 6 ++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index f676abab044b..a27deb0b5f03 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -255,6 +255,14 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc,
>  			   TCPC_TCPC_CTRL_ORIENTATION : 0);
>  }
>  
> +static void tcpci_set_partner_usb_comm_capable(struct tcpc_dev *tcpc, bool capable)
> +{
> +	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
> +
> +	if (tcpci->data->set_partner_usb_comm_capable)
> +		tcpci->data->set_partner_usb_comm_capable(tcpci, tcpci->data, capable);
> +}
> +
>  static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
>  {
>  	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
> @@ -720,6 +728,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
>  	tcpci->tcpc.set_bist_data = tcpci_set_bist_data;
>  	tcpci->tcpc.enable_frs = tcpci_enable_frs;
>  	tcpci->tcpc.frs_sourcing_vbus = tcpci_frs_sourcing_vbus;
> +	tcpci->tcpc.set_partner_usb_comm_capable = tcpci_set_partner_usb_comm_capable;
>  
>  	if (tcpci->data->auto_discharge_disconnect) {
>  		tcpci->tcpc.enable_auto_vbus_discharge = tcpci_enable_auto_vbus_discharge;
> diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
> index c3c7d07d9b4e..57b6e24e0a0c 100644
> --- a/drivers/usb/typec/tcpm/tcpci.h
> +++ b/drivers/usb/typec/tcpm/tcpci.h
> @@ -161,6 +161,10 @@ struct tcpci;
>   *		Optional; Enables TCPC to autonously discharge vbus on disconnect.
>   * @vbus_vsafe0v:
>   *		optional; Set when TCPC can detect whether vbus is at VSAFE0V.
> + * @set_partner_usb_comm_capable:
> + *		Optional; The USB Communications Capable bit indicates if port
> + *		partner is capable of communication over the USB data lines
> + *		(e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
>   */
>  struct tcpci_data {
>  	struct regmap *regmap;
> @@ -175,6 +179,8 @@ struct tcpci_data {
>  				  enum typec_cc_status cc);
>  	int (*set_vbus)(struct tcpci *tcpci, struct tcpci_data *data, bool source, bool sink);
>  	void (*frs_sourcing_vbus)(struct tcpci *tcpci, struct tcpci_data *data);
> +	void (*set_partner_usb_comm_capable)(struct tcpci *tcpci, struct tcpci_data *data,
> +					     bool capable);
>  };
>  
>  struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
> -- 
> 2.30.0.365.g02bc693789-goog

thanks,

-- 
heikki