Merge tag 'tag-ib-usb-typec-chrome-platform-cros-ec-typec-clear-pd-di…

…scovery-events-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux into usb-next

Benson writes:

clear-pd-discovery-events

This pair of patches fixes an issue where cros_ec_typec creates stale
cable nodes on detach because of uncleared pd discovery status events.

* tag 'tag-ib-usb-typec-chrome-platform-cros-ec-typec-clear-pd-discovery-events-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
  platform/chrome: cros_ec_typec: Clear Type C disc events
  platform/chrome: cros_ec: Import Type C control command

drivers/platform/chrome/cros_ec_typec.c

@@ -870,6 +870,18 @@ static int cros_typec_handle_sop_disc(struct cros_typec_data *typec, int port_nu
 	return ret;
 }
 
+static int cros_typec_send_clear_event(struct cros_typec_data *typec, int port_num, u32 events_mask)
+{
+	struct ec_params_typec_control req = {
+		.port = port_num,
+		.command = TYPEC_CONTROL_COMMAND_CLEAR_EVENTS,
+		.clear_events_mask = events_mask,
+	};
+
+	return cros_typec_ec_command(typec, 0, EC_CMD_TYPEC_CONTROL, &req,
+				     sizeof(req), NULL, 0);
+}
+
 static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num)
 {
 	struct ec_response_typec_status resp;
@@ -894,9 +906,14 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
 		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
+		else {
 			typec->ports[port_num]->sop_disc_done = true;
-
+			ret = cros_typec_send_clear_event(typec, port_num,
+							  PD_STATUS_EVENT_SOP_DISC_DONE);
+			if (ret < 0)
+				dev_warn(typec->dev,
+					 "Failed SOP Disc event clear, port: %d\n", port_num);
+		}
 		if (resp.sop_connected)
 			typec_set_pwr_opmode(typec->ports[port_num]->port, TYPEC_PWR_MODE_PD);
 	}
@@ -910,8 +927,14 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
 		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
+		else {
 			typec->ports[port_num]->sop_prime_disc_done = true;
+			ret = cros_typec_send_clear_event(typec, port_num,
+							  PD_STATUS_EVENT_SOP_PRIME_DISC_DONE);
+			if (ret < 0)
+				dev_warn(typec->dev,
+					 "Failed SOP Disc event clear, port: %d\n", port_num);
+		}
 	}
 }
 

include/linux/platform_data/cros_ec_commands.h

@@ -5577,6 +5577,32 @@ struct ec_response_typec_discovery {
 	struct svid_mode_info svids[0];
 } __ec_align1;
 
+/* USB Type-C commands for AP-controlled device policy. */
+#define EC_CMD_TYPEC_CONTROL 0x0132
+
+enum typec_control_command {
+	TYPEC_CONTROL_COMMAND_EXIT_MODES,
+	TYPEC_CONTROL_COMMAND_CLEAR_EVENTS,
+	TYPEC_CONTROL_COMMAND_ENTER_MODE,
+};
+
+struct ec_params_typec_control {
+	uint8_t port;
+	uint8_t command;	/* enum typec_control_command */
+	uint16_t reserved;
+
+	/*
+	 * This section will be interpreted based on |command|. Define a
+	 * placeholder structure to avoid having to increase the size and bump
+	 * the command version when adding new sub-commands.
+	 */
+	union {
+		uint32_t clear_events_mask;
+		uint8_t mode_to_enter;      /* enum typec_mode */
+		uint8_t placeholder[128];
+	};
+} __ec_align1;
+
 /*
  * Gather all status information for a port.
  *