On Wed, Dec 28, 2022 at 12:45:13AM +0000, Prashant Malani wrote:
> Add support to send generic VDM messages from the alt mode driver to the
> partner (via the ChromeOS EC). The function introduced here is intended
> to be called by the alt mode driver (via the Type-C bus logic).
>
> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
> ---
> drivers/platform/chrome/cros_typec_vdm.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/drivers/platform/chrome/cros_typec_vdm.c b/drivers/platform/chrome/cros_typec_vdm.c
> index fc7b602ceb37..aca9d337118e 100644
> --- a/drivers/platform/chrome/cros_typec_vdm.c
> +++ b/drivers/platform/chrome/cros_typec_vdm.c
> @@ -77,6 +77,30 @@ static int cros_typec_port_amode_enter(struct typec_altmode *amode, u32 *vdo)
> sizeof(req), NULL, 0);
> }
>
> +static int cros_typec_port_amode_vdm(struct typec_altmode *amode, const u32 hdr,
> + const u32 *vdo, int cnt)
> +{
> + struct cros_typec_port *port = typec_altmode_get_drvdata(amode);
> + struct ec_params_typec_control req = {
> + .port = port->port_num,
> + .command = TYPEC_CONTROL_COMMAND_SEND_VDM_REQ,
> + };
> + struct typec_vdm_req vdm_req = {};
> +
> + vdm_req.vdm_data[0] = hdr;
> + vdm_req.vdm_data_objects = cnt;
> + memcpy(&vdm_req.vdm_data[1], vdo, cnt - 1);
> + vdm_req.partner_type = TYPEC_PARTNER_SOP;
> + req.vdm_req_params = vdm_req;
> +
> + dev_dbg(port->typec_data->dev, "Sending VDM, hdr: %x, num_objects: %d, port: %d\n",
> + hdr, cnt, port->port_num);
> +
> + return cros_ec_cmd(port->typec_data->ec, 0, EC_CMD_TYPEC_CONTROL, &req,
> + sizeof(req), NULL, 0);
> +}
> +
> struct typec_altmode_ops port_amode_ops = {
> .enter = cros_typec_port_amode_enter,
> + .vdm = cros_typec_port_amode_vdm,
> };
> --
> 2.39.0.314.g84b9a713c41-goog
>
>
--
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@google.com
Chromium OS Project
bleung@chromium.org