[nrf fromtree] Bluetooth: CAP: Add support for doing just disable for unicast stop

The unicast_stop function is changed to primarily do a
BAP disable instead of a release, with optional
support for releasing the streams once they have been disabled.

This also adds unittests for the procedure which also
allow us to remove the invalid param testing from the BSIM tests.

Signed-off-by: Emil Gydesen <[email protected]>
(cherry picked from commit fa4f2ff)

Author: Thalley

include/zephyr/bluetooth/audio/cap.h

@@ -312,6 +312,9 @@ struct bt_cap_unicast_audio_stop_param {
 
 	/** Array of streams to stop */
 	struct bt_cap_stream **streams;
+
+	/** Whether to release the streams after they have stopped */
+	bool release;
 };
 
 /**
@@ -379,7 +382,10 @@ int bt_cap_initiator_unicast_audio_update(const struct bt_cap_unicast_audio_upda
  *
  * @param param Stop parameters.
  *
- * @return 0 on success or negative error value on failure.
+ * @return 0 on success
+ * @retval -EBUSY if a CAP procedure is already in progress
+ * @retval -EINVAL if any parameter is invalid
+ * @retval -EALREADY if no state changes will occur
  */
 int bt_cap_initiator_unicast_audio_stop(const struct bt_cap_unicast_audio_stop_param *param);
 

subsys/bluetooth/audio/bap_stream.c

@@ -445,7 +445,7 @@ void bt_bap_stream_detach(struct bt_bap_stream *stream)
 {
 	const bool is_broadcast = bt_bap_stream_is_broadcast(stream);
 
-	LOG_DBG("stream %p", stream);
+	LOG_DBG("stream %p conn %p ep %p", stream, (void *)stream->conn, (void *)stream->ep);
 
 	if (stream->conn != NULL) {
 		bt_conn_unref(stream->conn);
@@ -523,7 +523,7 @@ int bt_bap_stream_config(struct bt_conn *conn, struct bt_bap_stream *stream, str
 	       codec_cfg, codec_cfg ? codec_cfg->id : 0, codec_cfg ? codec_cfg->cid : 0,
 	       codec_cfg ? codec_cfg->vid : 0);
 
-	CHECKIF(conn == NULL || stream == NULL || codec_cfg == NULL) {
+	CHECKIF(conn == NULL || stream == NULL || codec_cfg == NULL || ep == NULL) {
 		LOG_DBG("NULL value(s) supplied)");
 		return -EINVAL;
 	}

subsys/bluetooth/audio/cap_common.c

@@ -64,6 +64,11 @@ void bt_cap_common_set_subproc(enum bt_cap_common_subproc_type subproc_type)
 	active_proc.subproc_type = subproc_type;
 }
 
+bool bt_cap_common_proc_is_type(enum bt_cap_common_proc_type proc_type)
+{
+	return active_proc.proc_type == proc_type;
+}
+
 bool bt_cap_common_subproc_is_type(enum bt_cap_common_subproc_type subproc_type)
 {
 	return active_proc.subproc_type == subproc_type;
@@ -122,7 +127,12 @@ void bt_cap_common_abort_proc(struct bt_conn *conn, int err)
 		return;
 	}
 
+#if defined(CONFIG_BT_CAP_INITIATOR_UNICAST)
+	LOG_DBG("Aborting proc %d with subproc %d for %p: %d", active_proc.proc_type,
+		active_proc.subproc_type, (void *)conn, err);
+#else  /* !CONFIG_BT_CAP_INITIATOR_UNICAST */
 	LOG_DBG("Aborting proc %d for %p: %d", active_proc.proc_type, (void *)conn, err);
+#endif /* CONFIG_BT_CAP_INITIATOR_UNICAST */
 
 	active_proc.err = err;
 	active_proc.failed_conn = conn;