usb: typec: ucsi: Fix cable registration

The Cable PD Revision field in GET_CABLE_PROPERTY was
introduced in UCSI v2.1, so adding check for that.

The cable properties are also not used anywhere after the
cable is registered, so removing the cable_prop member
from struct ucsi_connector while at it.

Fixes: 38ca416 ("usb: typec: ucsi: Register cables based on GET_CABLE_PROPERTY")
Cc: [email protected]
Signed-off-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Heikki Krogerus

drivers/usb/typec/ucsi/ucsi.c

@@ -965,10 +965,20 @@ static void ucsi_unregister_plug(struct ucsi_connector *con)
 
 static int ucsi_register_cable(struct ucsi_connector *con)
 {
+	struct ucsi_cable_property cable_prop;
 	struct typec_cable *cable;
 	struct typec_cable_desc desc = {};
+	u64 command;
+	int ret;
+
+	command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
+	ret = ucsi_send_command(con->ucsi, command, &cable_prop, sizeof(cable_prop));
+	if (ret < 0) {
+		dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n", ret);
+		return ret;
+	}
 
-	switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(con->cable_prop.flags)) {
+	switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(cable_prop.flags)) {
 	case UCSI_CABLE_PROPERTY_PLUG_TYPE_A:
 		desc.type = USB_PLUG_TYPE_A;
 		break;
@@ -984,10 +994,10 @@ static int ucsi_register_cable(struct ucsi_connector *con)
 	}
 
 	desc.identity = &con->cable_identity;
-	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE &
-			 con->cable_prop.flags);
-	desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(
-	    con->cable_prop.flags);
+	desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE & cable_prop.flags);
+
+	if (con->ucsi->version >= UCSI_VERSION_2_1)
+		desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(cable_prop.flags);
 
 	cable = typec_register_cable(con->port, &desc);
 	if (IS_ERR(cable)) {
@@ -1193,21 +1203,11 @@ static int ucsi_check_connection(struct ucsi_connector *con)
 
 static int ucsi_check_cable(struct ucsi_connector *con)
 {
-	u64 command;
 	int ret, num_plug_am;
 
 	if (con->cable)
 		return 0;
 
-	command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
-	ret = ucsi_send_command(con->ucsi, command, &con->cable_prop,
-				sizeof(con->cable_prop));
-	if (ret < 0) {
-		dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n",
-			ret);
-		return ret;
-	}
-
 	ret = ucsi_register_cable(con);
 	if (ret < 0)
 		return ret;

drivers/usb/typec/ucsi/ucsi.h

@@ -465,7 +465,6 @@ struct ucsi_connector {
 
 	struct ucsi_connector_status status;
 	struct ucsi_connector_capability cap;
-	struct ucsi_cable_property cable_prop;
 	struct power_supply *psy;
 	struct power_supply_desc psy_desc;
 	u32 rdo;