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

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Message-ID: <CACeCKadCBzkaNbna1vR8rqPpX4SRmhN585zAN=Ug6GLoY6qhEQ@mail.gmail.com>
Date:   Mon, 1 Feb 2021 10:13:31 -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 5/6] platform/chrome: cros_ec_typec: Set Partner PD
 revision from status

On Thu, Jan 28, 2021 at 10:14 PM Benson Leung <bleung@...omium.org> 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>
Reviewed-by: Prashant Malani <pmalani@...mium.org>

> ---
>  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
> --
> 2.30.0.365.g02bc693789-goog
>