diff --git a/spa/plugins/audiomixer/mixer-dsp.c b/spa/plugins/audiomixer/mixer-dsp.c
index f8aa11745..d36fc852c 100644
--- a/spa/plugins/audiomixer/mixer-dsp.c
+++ b/spa/plugins/audiomixer/mixer-dsp.c
@@ -263,7 +263,8 @@ static int impl_node_add_port(void *object, enum spa_direction direction, uint32
 		this->last_port = port_id + 1;
 	port->valid = true;
 
-	spa_log_debug(this->log, NAME " %p: add port %d %d", this, port_id, this->last_port);
+	spa_log_debug(this->log, NAME " %p: add port %d:%d %d", this,
+			direction, port_id, this->last_port);
 	emit_port_info(this, port, true);
 
 	return 0;
@@ -297,7 +298,8 @@ impl_node_remove_port(void *object, enum spa_direction direction, uint32_t port_
 
 		this->last_port = i + 1;
 	}
-	spa_log_debug(this->log, NAME " %p: remove port %d %d", this, port_id, this->last_port);
+	spa_log_debug(this->log, NAME " %p: remove port %d:%d %d", this,
+			direction, port_id, this->last_port);
 
 	spa_node_emit_port_info(&this->hooks, direction, port_id, NULL);
 
@@ -566,13 +568,14 @@ impl_node_port_use_buffers(void *object,
 	uint32_t i;
 
 	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_log_debug(this->log, NAME " %p: use %d buffers on port %d:%d",
+			this, n_buffers, direction, port_id);
+
 	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
 
 	port = GET_PORT(this, direction, port_id);
 
-	spa_log_debug(this->log, NAME " %p: use buffers %d on port %d:%d",
-			this, n_buffers, direction, port_id);
-
 	spa_return_val_if_fail(port->have_format, -EIO);
 
 	clear_buffers(this, port);
@@ -597,8 +600,8 @@ impl_node_port_use_buffers(void *object,
 		if (direction == SPA_DIRECTION_OUTPUT)
 			queue_buffer(this, port, b);
 
-		spa_log_debug(this->log, NAME " %p: port %d.%d buffer %d n_data:%d data:%p maxsize:%d",
-				this, i, direction, port_id,
+		spa_log_debug(this->log, NAME " %p: port %d:%d buffer:%d n_data:%d data:%p maxsize:%d",
+				this, direction, port_id, i,
 				buffers[i]->n_datas, d[0].data, d[0].maxsize);
 	}
 	port->n_buffers = n_buffers;
@@ -615,13 +618,14 @@ impl_node_port_set_io(void *object,
 	struct port *port;
 
 	spa_return_val_if_fail(this != NULL, -EINVAL);
-	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
-
-	port = GET_PORT(this, direction, port_id);
 
 	spa_log_debug(this->log, NAME " %p: port %d:%d io %d %p/%zd", this,
 			direction, port_id, id, data, size);
 
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
 	switch (id) {
 	case SPA_IO_Buffers:
 		port->io = data;
diff --git a/src/pipewire/impl-port.c b/src/pipewire/impl-port.c
index 9f680da87..a4acc6ca1 100644
--- a/src/pipewire/impl-port.c
+++ b/src/pipewire/impl-port.c
@@ -595,7 +595,7 @@ static int setup_mixer(struct pw_impl_port *port, const struct spa_pod *param)
 		return res;
 	}
 
-	pw_log_debug("mix node %p", iface);
+	pw_log_debug("mix node handle:%p iface:%p", handle, iface);
 	pw_impl_port_set_mix(port, (struct spa_node*)iface,
 			PW_IMPL_PORT_MIX_FLAG_MULTI |
 			PW_IMPL_PORT_MIX_FLAG_NEGOTIATE);