Bluetooth: HFP_AG: Add ACL conn to the connected callback

If the AG works as Data Channel Acceptor, the ACL conn cannot be known
by the application of AG. Similar with HF, add ACL conn as the first
parameter to the `connected` callback of AG.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>

Author: lylezhu2012

include/zephyr/bluetooth/classic/hfp_ag.h

@@ -84,9 +84,10 @@ struct bt_hfp_ag_cb {
 	 *  If this callback is provided it will be called whenever the
 	 *  AG connection completes.
 	 *
+	 *  @param conn Connection object.
 	 *  @param ag HFP AG object.
 	 */
-	void (*connected)(struct bt_hfp_ag *ag);
+	void (*connected)(struct bt_conn *conn, struct bt_hfp_ag *ag);
 	/** HF disconnected callback to application
 	 *
 	 *  If this callback is provided it will be called whenever the

samples/bluetooth/handsfree_ag/src/main.c

@@ -40,8 +40,12 @@ struct k_work_delayable call_remote_accept_work;
 NET_BUF_POOL_DEFINE(sdp_discover_pool, 10, BT_L2CAP_BUF_SIZE(CONFIG_BT_L2CAP_TX_MTU),
 		    CONFIG_BT_CONN_TX_USER_DATA_SIZE, NULL);
 
-static void ag_connected(struct bt_hfp_ag *ag)
+static void ag_connected(struct bt_conn *conn, struct bt_hfp_ag *ag)
 {
+	if (conn != default_conn) {
+		printk("The conn %p is not aligned with ACL conn %p", conn, default_conn);
+	}
+
 	if (!hfp_ag) {
 		hfp_ag = ag;
 	}

subsys/bluetooth/host/classic/hfp_ag.c

@@ -231,7 +231,7 @@ static void bt_hfp_ag_set_state(struct bt_hfp_ag *ag, bt_hfp_state_t state)
 		break;
 	case BT_HFP_CONNECTED:
 		if (bt_ag && bt_ag->connected) {
-			bt_ag->connected(ag);
+			bt_ag->connected(ag->acl_conn, ag);
 		}
 		break;
 	case BT_HFP_DISCONNECTING:

subsys/bluetooth/host/classic/shell/hfp.c

@@ -982,8 +982,11 @@ static void ag_remove_a_call(struct bt_hfp_ag_call *call)
 	}
 }
 
-static void ag_connected(struct bt_hfp_ag *ag)
+static void ag_connected(struct bt_conn *conn, struct bt_hfp_ag *ag)
 {
+	if (conn != default_conn) {
+		bt_shell_warn("The conn %p is not aligned with ACL conn %p", conn, default_conn);
+	}
 	hfp_ag = ag;
 	bt_shell_print("ag connected");
 }