linux-kernel - Re: [PATCH 5/6] platform/chrome: cros_ec_typec: Set Partner PD revision from status

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Message-ID: <6f33af27-2ede-462a-1683-f97137a40a0f@collabora.com>
Date:   Mon, 1 Feb 2021 15:33:32 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Benson Leung <bleung@...omium.org>,
        heikki.krogerus@...ux.intel.com, pmalani@...omium.org,
        gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     groeck@...omium.org, bleung@...gle.com
Subject: Re: [PATCH 5/6] platform/chrome: cros_ec_typec: Set Partner PD
 revision from status

Hi Benson,

On 29/1/21 7:14, Benson Leung wrote:
> Status provides sop_revision. Process it, and set it using the new
> setter in the typec class.
> 
> Signed-off-by: Benson Leung <bleung@...omium.org>

Acked-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>

> ---
>  drivers/platform/chrome/cros_ec_typec.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
> index 30600e9454e1..6bc6fafd54a4 100644
> --- a/drivers/platform/chrome/cros_ec_typec.c
> +++ b/drivers/platform/chrome/cros_ec_typec.c
> @@ -824,7 +824,7 @@ static int cros_typec_handle_sop_prime_disc(struct cros_typec_data *typec, int p
>  	return ret;
>  }
>  
> -static int cros_typec_handle_sop_disc(struct cros_typec_data *typec, int port_num)
> +static int cros_typec_handle_sop_disc(struct cros_typec_data *typec, int port_num, u16 pd_revision)
>  {
>  	struct cros_typec_port *port = typec->ports[port_num];
>  	struct ec_response_typec_discovery *sop_disc = port->disc_data;
> @@ -842,6 +842,12 @@ static int cros_typec_handle_sop_disc(struct cros_typec_data *typec, int port_nu
>  		goto disc_exit;
>  	}
>  
> +	ret = typec_partner_set_pd_revision(port->partner, pd_revision);
> +	if (ret < 0) {
> +		dev_err(typec->dev, "Failed to update partner PD revision, port: %d\n", port_num);
> +		goto disc_exit;
> +	}
> +
>  	memset(sop_disc, 0, EC_PROTO2_MAX_RESPONSE_SIZE);
>  	ret = cros_typec_ec_command(typec, 0, EC_CMD_TYPEC_DISCOVERY, &req, sizeof(req),
>  				    sop_disc, EC_PROTO2_MAX_RESPONSE_SIZE);
> @@ -885,7 +891,11 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
>  
>  	/* Handle any events appropriately. */
>  	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);
> +		u16 sop_revision;
> +
> +		/* Convert BCD to the format preferred by the TypeC framework */
> +		sop_revision = (le16_to_cpu(resp.sop_revision) & 0xff00) >> 4;
> +		ret = cros_typec_handle_sop_disc(typec, port_num, sop_revision);
>  		if (ret < 0)
>  			dev_err(typec->dev, "Couldn't parse SOP Disc data, port: %d\n", port_num);
>  		else
>