linux-kernel - Re: [PATCH v2 1/6] platform/chrome: cros_ec_typec: Make disc

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Date:   Mon, 9 Nov 2020 10:21:38 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Prashant Malani <pmalani@...omium.org>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        gregkh@...uxfoundation.org, Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>
Subject: Re: [PATCH v2 1/6] platform/chrome: cros_ec_typec: Make disc_done
 flag partner-only

On Fri, Nov 06, 2020 at 10:40:59AM -0800, Prashant Malani wrote:
> Change the disc_done flag, which indicates whether PD discovery is
> complete, to sop_disc_done instead, since we will process SOP and SOP'
> discovery data separately.
> 
> Signed-off-by: Prashant Malani <pmalani@...omium.org>

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

> ---
> 
> Changes in v2:
> - No changes.
> 
>  drivers/platform/chrome/cros_ec_typec.c | 19 +++++++------------
>  1 file changed, 7 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
> index ce031a10eb1b..801c3d2c1fbd 100644
> --- a/drivers/platform/chrome/cros_ec_typec.c
> +++ b/drivers/platform/chrome/cros_ec_typec.c
> @@ -57,8 +57,8 @@ struct cros_typec_port {
>  	/* Port alt modes. */
>  	struct typec_altmode p_altmode[CROS_EC_ALTMODE_MAX];
>  
> -	/* Flag indicating that PD discovery data parsing is completed. */
> -	bool disc_done;
> +	/* Flag indicating that PD partner discovery data parsing is completed. */
> +	bool sop_disc_done;
>  	struct ec_response_typec_discovery *sop_disc;
>  	struct list_head partner_mode_list;
>  };
> @@ -210,7 +210,7 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
>  	typec_unregister_partner(port->partner);
>  	port->partner = NULL;
>  	memset(&port->p_identity, 0, sizeof(port->p_identity));
> -	port->disc_done = false;
> +	port->sop_disc_done = false;
>  }
>  
>  static void cros_unregister_ports(struct cros_typec_data *typec)
> @@ -727,18 +727,13 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
>  		return;
>  	}
>  
> -	if (typec->ports[port_num]->disc_done)
> -		return;
> -
>  	/* Handle any events appropriately. */
> -	if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE) {
> +	if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE && !typec->ports[port_num]->sop_disc_done) {
>  		ret = cros_typec_handle_sop_disc(typec, port_num);
> -		if (ret < 0) {
> +		if (ret < 0)
>  			dev_err(typec->dev, "Couldn't parse SOP Disc data, port: %d\n", port_num);
> -			return;
> -		}
> -
> -		typec->ports[port_num]->disc_done = true;
> +		else
> +			typec->ports[port_num]->sop_disc_done = true;
>  	}
>  }
>  

thanks,

-- 
heikki