Messages in this thread | | | Date | Thu, 9 Apr 2020 15:40:58 -0700 | From | Prashant Malani <> | Subject | Re: [PATCH 3/3] platform/chrome: typec: Register port partner |
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Hi Enric,
Thanks as always. Response inline:
On Thu, Apr 09, 2020 at 11:40:39PM +0200, Enric Balletbo i Serra wrote: > Hi Prashant, > > Thank you for your patch. > > On 7/4/20 3:09, Prashant Malani wrote: > > Register (and unregister) the port partner when a connect (and > > disconnect) is detected. > > > > Co-developed-by: Jon Flatley <jflat@chromium.org> > > Signed-off-by: Prashant Malani <pmalani@chromium.org> > > --- > > drivers/platform/chrome/cros_ec_typec.c | 47 +++++++++++++++++++++++++ > > 1 file changed, 47 insertions(+) > > > > diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c > > index 1955e1dfebc6d..e7d4d6ccccca6 100644 > > --- a/drivers/platform/chrome/cros_ec_typec.c > > +++ b/drivers/platform/chrome/cros_ec_typec.c > > @@ -22,6 +22,9 @@ struct cros_typec_port { > > struct typec_port *port; > > /* Initial capabilities for the port. */ > > struct typec_capability caps; > > + struct typec_partner *partner; > > + /* Port partner PD identity info. */ > > + struct usb_pd_identity p_identity; > > }; > > > > /* Platform-specific data for the Chrome OS EC Type C controller. */ > > @@ -191,6 +194,29 @@ static int cros_typec_ec_command(struct cros_typec_data *typec, > > return ret; > > } > > > > +static int cros_typec_add_partner(struct cros_typec_data *typec, int port_num, > > + bool pd_en) > > +{ > > + struct cros_typec_port *port = typec->ports[port_num]; > > + struct typec_partner_desc p_desc = { > > + .usb_pd = pd_en, > > + }; > > + > > + /* > > + * Fill an initial PD identity, which will then be updated with info > > + * from the EC. > > + */ > > + p_desc.identity = &port->p_identity; > > + > > + port->partner = typec_register_partner(port->port, &p_desc); > > + if (IS_ERR_OR_NULL(port->partner)) { > > + port->partner = NULL; > > + return PTR_ERR(port->partner); > > This is always returning PTR_ERR(NULL) that yields 0, that's not what you want. > A static checker warning will be triggered. > Got it. I will use a "ret" variable. > > > + } > > + > > + return 0; > > +} > > + > > static void cros_typec_set_port_params_v0(struct cros_typec_data *typec, > > int port_num, struct ec_response_usb_pd_control *resp) > > { > > @@ -213,6 +239,8 @@ static void cros_typec_set_port_params_v1(struct cros_typec_data *typec, > > { > > struct typec_port *port = typec->ports[port_num]->port; > > enum typec_orientation polarity; > > + bool pd_en; > > + int ret; > > > > if (!(resp->enabled & PD_CTRL_RESP_ENABLED_CONNECTED)) > > polarity = TYPEC_ORIENTATION_NONE; > > @@ -227,6 +255,25 @@ static void cros_typec_set_port_params_v1(struct cros_typec_data *typec, > > TYPEC_SOURCE : TYPEC_SINK); > > typec_set_vconn_role(port, resp->role & PD_CTRL_RESP_ROLE_VCONN ? > > TYPEC_SOURCE : TYPEC_SINK); > > + > > + /* Register/remove partners when a connect/disconnect occurs. */ > > + if (resp->enabled & PD_CTRL_RESP_ENABLED_CONNECTED) { > > + if (typec->ports[port_num]->partner) > > + return; > > + > > + pd_en = resp->enabled & PD_CTRL_RESP_ENABLED_PD_CAPABLE; > > + ret = cros_typec_add_partner(typec, port_num, pd_en); > > + if (!ret) > > + dev_warn(typec->dev, > > + "Failed to register partner on port: %d\n", > > + port_num); > > + } else { > > + if (!typec->ports[port_num]->partner) > > + return; > > + > > + typec_unregister_partner(typec->ports[port_num]->partner); > > + typec->ports[port_num]->partner = NULL; > > + } > > } > > > > static int cros_typec_port_update(struct cros_typec_data *typec, int port_num) > >
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