linux-kernel - Re: [PATCH 4/6] platform/chrome: cros_ec_typec: Report SOP' PD revision from status

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Date:   Mon, 1 Feb 2021 10:12:49 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     Benson Leung <bleung@...omium.org>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:USB NETWORKING DRIVERS" <linux-usb@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Guenter Roeck <groeck@...omium.org>,
        Benson Leung <bleung@...gle.com>
Subject: Re: [PATCH 4/6] platform/chrome: cros_ec_typec: Report SOP' PD
 revision from status

Hi Benson,

On Thu, Jan 28, 2021 at 10:14 PM Benson Leung <bleung@...omium.org> wrote:
>
> cros_typec_handle_sop_prime_disc now takes the PD revision provided
> by the EC_CMD_TYPEC_STATUS command response for the SOP'.
>
> Attach the properly formatted pd_revision to the cable desc before
> registering the cable.
>
> Signed-off-by: Benson Leung <bleung@...omium.org>
Reviewed-by: Prashant Malani <pmalani@...omium.org>

> ---
>  drivers/platform/chrome/cros_ec_typec.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
> index e724a5eaef1c..30600e9454e1 100644
> --- a/drivers/platform/chrome/cros_ec_typec.c
> +++ b/drivers/platform/chrome/cros_ec_typec.c
> @@ -748,7 +748,7 @@ static void cros_typec_parse_pd_identity(struct usb_pd_identity *id,
>                 id->vdo[i - 3] = disc->discovery_vdo[i];
>  }
>
> -static int cros_typec_handle_sop_prime_disc(struct cros_typec_data *typec, int port_num)
> +static int cros_typec_handle_sop_prime_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 *disc = port->disc_data;
> @@ -794,6 +794,7 @@ static int cros_typec_handle_sop_prime_disc(struct cros_typec_data *typec, int p
>         }
>
>         c_desc.identity = &port->c_identity;
> +       c_desc.pd_revision = pd_revision;
>
>         port->cable = typec_register_cable(port->port, &c_desc);
>         if (IS_ERR(port->cable)) {
> @@ -893,7 +894,11 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
>
>         if (resp.events & PD_STATUS_EVENT_SOP_PRIME_DISC_DONE &&
>             !typec->ports[port_num]->sop_prime_disc_done) {
> -               ret = cros_typec_handle_sop_prime_disc(typec, port_num);
> +               u16 sop_prime_revision;
> +
> +               /* Convert BCD to the format preferred by the TypeC framework */
> +               sop_prime_revision = (le16_to_cpu(resp.sop_prime_revision) & 0xff00) >> 4;
> +               ret = cros_typec_handle_sop_prime_disc(typec, port_num, sop_prime_revision);
>                 if (ret < 0)
>                         dev_err(typec->dev, "Couldn't parse SOP' Disc data, port: %d\n", port_num);
>                 else
> --
> 2.30.0.365.g02bc693789-goog
>