diff --git a/pipewire-pulseaudio b/pipewire-pulseaudio
index 491a7679f..0de0de299 160000
--- a/pipewire-pulseaudio
+++ b/pipewire-pulseaudio
@@ -1 +1 @@
-Subproject commit 491a7679f884f30a845e05b279abbd9ef66ae328
+Subproject commit 0de0de299a53fe8ab561d3eefffbe6bc66645777
diff --git a/src/examples/media-session.c b/src/examples/media-session.c
index c2a200722..23c010fb4 100644
--- a/src/examples/media-session.c
+++ b/src/examples/media-session.c
@@ -336,7 +336,7 @@ static int on_node_running(struct impl *impl, struct node *node)
 	return 0;
 }
 
-static void node_event_info(void *object, struct pw_node_info *info)
+static void node_event_info(void *object, const struct pw_node_info *info)
 {
 	struct node *n = object;
 	struct impl *impl = n->obj.impl;
@@ -568,7 +568,7 @@ handle_node(struct impl *impl, uint32_t id, uint32_t parent_id,
 	return 1;
 }
 
-static void port_event_info(void *object, struct pw_port_info *info)
+static void port_event_info(void *object, const struct pw_port_info *info)
 {
 	struct port *p = object;
 	pw_log_debug(NAME" %p: info for port %d", p->obj.impl, p->obj.id);
@@ -686,7 +686,7 @@ handle_port(struct impl *impl, uint32_t id, uint32_t parent_id, uint32_t type,
 	return 0;
 }
 
-static void client_event_info(void *object, struct pw_client_info *info)
+static void client_event_info(void *object, const struct pw_client_info *info)
 {
 	struct client *c = object;
 	uint32_t i;
@@ -1177,7 +1177,7 @@ do_link:
         return 1;
 }
 
-static void dsp_node_event_info(void *object, struct pw_node_info *info)
+static void dsp_node_event_info(void *object, const struct pw_node_info *info)
 {
 	struct session *s = object;
 	struct node *dsp;
diff --git a/src/gst/gstpipewiredeviceprovider.c b/src/gst/gstpipewiredeviceprovider.c
index 9ba63cb58..e2e51f152 100644
--- a/src/gst/gstpipewiredeviceprovider.c
+++ b/src/gst/gstpipewiredeviceprovider.c
@@ -362,7 +362,7 @@ on_state_changed (void *data, enum pw_remote_state old, enum pw_remote_state sta
     pw_thread_loop_signal (self->main_loop, FALSE);
 }
 
-static void port_event_info(void *data, struct pw_port_info *info)
+static void port_event_info(void *data, const struct pw_port_info *info)
 {
   struct port_data *port_data = data;
   pw_log_debug("%p", port_data);
@@ -389,7 +389,7 @@ static const struct pw_port_proxy_events port_events = {
   .param = port_event_param
 };
 
-static void node_event_info(void *data, struct pw_node_info *info)
+static void node_event_info(void *data, const struct pw_node_info *info)
 {
   struct node_data *node_data = data;
   pw_log_debug("%p", node_data);
diff --git a/src/modules/module-protocol-native/protocol-native.c b/src/modules/module-protocol-native/protocol-native.c
index a640f5744..104407b2b 100644
--- a/src/modules/module-protocol-native/protocol-native.c
+++ b/src/modules/module-protocol-native/protocol-native.c
@@ -244,7 +244,7 @@ static int core_demarshal_remove_id(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void core_marshal_info(void *object, struct pw_core_info *info)
+static void core_marshal_info(void *object, const struct pw_core_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -534,7 +534,7 @@ static int registry_demarshal_destroy(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void module_marshal_info(void *object, struct pw_module_info *info)
+static void module_marshal_info(void *object, const struct pw_module_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -593,7 +593,7 @@ static int module_demarshal_info(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void device_marshal_info(void *object, struct pw_device_info *info)
+static void device_marshal_info(void *object, const struct pw_device_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -749,7 +749,7 @@ static int device_demarshal_set_param(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void factory_marshal_info(void *object, struct pw_factory_info *info)
+static void factory_marshal_info(void *object, const struct pw_factory_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -809,7 +809,7 @@ static int factory_demarshal_info(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void node_marshal_info(void *object, struct pw_node_info *info)
+static void node_marshal_info(void *object, const struct pw_node_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -1003,7 +1003,7 @@ static int node_demarshal_send_command(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void port_marshal_info(void *object, struct pw_port_info *info)
+static void port_marshal_info(void *object, const struct pw_port_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -1127,7 +1127,7 @@ static int port_demarshal_enum_params(void *object, void *data, size_t size)
 	return 0;
 }
 
-static void client_marshal_info(void *object, struct pw_client_info *info)
+static void client_marshal_info(void *object, const struct pw_client_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
@@ -1334,7 +1334,7 @@ static int client_demarshal_update_permissions(void *object, void *data, size_t
 	return 0;
 }
 
-static void link_marshal_info(void *object, struct pw_link_info *info)
+static void link_marshal_info(void *object, const struct pw_link_info *info)
 {
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
diff --git a/src/pipewire/interfaces.h b/src/pipewire/interfaces.h
index c48fb101f..c4d790dde 100644
--- a/src/pipewire/interfaces.h
+++ b/src/pipewire/interfaces.h
@@ -265,7 +265,7 @@ struct pw_core_proxy_events {
 	 *
 	 * \param info new core info
 	 */
-	void (*info) (void *object, struct pw_core_info *info);
+	void (*info) (void *object, const struct pw_core_info *info);
 };
 
 static inline void
@@ -439,7 +439,7 @@ struct pw_module_proxy_events {
 	 *
 	 * \param info info about the module
 	 */
-	void (*info) (void *object, struct pw_module_info *info);
+	void (*info) (void *object, const struct pw_module_info *info);
 };
 
 static inline void
@@ -517,7 +517,7 @@ struct pw_device_proxy_events {
 	 *
 	 * \param info info about the device
 	 */
-	void (*info) (void *object, struct pw_device_info *info);
+	void (*info) (void *object, const struct pw_device_info *info);
 	/**
 	 * Notify a device param
 	 *
@@ -625,7 +625,7 @@ struct pw_node_proxy_events {
 	 *
 	 * \param info info about the node
 	 */
-	void (*info) (void *object, struct pw_node_info *info);
+	void (*info) (void *object, const struct pw_node_info *info);
 	/**
 	 * Notify a node param
 	 *
@@ -700,7 +700,7 @@ struct pw_port_proxy_events {
 	 *
 	 * \param info info about the port
 	 */
-	void (*info) (void *object, struct pw_port_info *info);
+	void (*info) (void *object, const struct pw_port_info *info);
 	/**
 	 * Notify a port param
 	 *
@@ -750,7 +750,7 @@ struct pw_factory_proxy_events {
 	 *
 	 * \param info info about the factory
 	 */
-	void (*info) (void *object, struct pw_factory_info *info);
+	void (*info) (void *object, const struct pw_factory_info *info);
 };
 
 /** Factory */
@@ -839,7 +839,7 @@ struct pw_client_proxy_events {
 	 *
 	 * \param info info about the client
 	 */
-	void (*info) (void *object, struct pw_client_info *info);
+	void (*info) (void *object, const struct pw_client_info *info);
 	/**
 	 * Notify a client permission
 	 *
@@ -891,7 +891,7 @@ struct pw_link_proxy_events {
 	 *
 	 * \param info info about the link
 	 */
-	void (*info) (void *object, struct pw_link_info *info);
+	void (*info) (void *object, const struct pw_link_info *info);
 };
 
 /** Link */
diff --git a/src/pipewire/remote.c b/src/pipewire/remote.c
index fc4e28749..dba17651c 100644
--- a/src/pipewire/remote.c
+++ b/src/pipewire/remote.c
@@ -170,7 +170,7 @@ pw_remote_update_state(struct pw_remote *remote, enum pw_remote_state state, con
 	return 0;
 }
 
-static void core_event_info(void *data, struct pw_core_info *info)
+static void core_event_info(void *data, const struct pw_core_info *info)
 {
 	struct pw_remote *this = data;
 
diff --git a/src/tools/pipewire-cli.c b/src/tools/pipewire-cli.c
index 6704ee44f..03deb64ee 100644
--- a/src/tools/pipewire-cli.c
+++ b/src/tools/pipewire-cli.c
@@ -614,7 +614,7 @@ static void info_device(struct proxy_data *pd)
 	info->change_mask = 0;
 }
 
-static void core_event_info(void *object, struct pw_core_info *info)
+static void core_event_info(void *object, const struct pw_core_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -635,7 +635,7 @@ static const struct pw_core_proxy_events core_events = {
 };
 
 
-static void module_event_info(void *object, struct pw_module_info *info)
+static void module_event_info(void *object, const struct pw_module_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -655,7 +655,7 @@ static const struct pw_module_proxy_events module_events = {
 	.info = module_event_info
 };
 
-static void node_event_info(void *object, struct pw_node_info *info)
+static void node_event_info(void *object, const struct pw_node_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -692,7 +692,7 @@ static const struct pw_node_proxy_events node_events = {
 };
 
 
-static void port_event_info(void *object, struct pw_port_info *info)
+static void port_event_info(void *object, const struct pw_port_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -728,7 +728,7 @@ static const struct pw_port_proxy_events port_events = {
 	.param = port_event_param
 };
 
-static void factory_event_info(void *object, struct pw_factory_info *info)
+static void factory_event_info(void *object, const struct pw_factory_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -748,7 +748,7 @@ static const struct pw_factory_proxy_events factory_events = {
 	.info = factory_event_info
 };
 
-static void client_event_info(void *object, struct pw_client_info *info)
+static void client_event_info(void *object, const struct pw_client_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -768,7 +768,7 @@ static const struct pw_client_proxy_events client_events = {
 	.info = client_event_info
 };
 
-static void link_event_info(void *object, struct pw_link_info *info)
+static void link_event_info(void *object, const struct pw_link_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
@@ -789,7 +789,7 @@ static const struct pw_link_proxy_events link_events = {
 };
 
 
-static void device_event_info(void *object, struct pw_device_info *info)
+static void device_event_info(void *object, const struct pw_device_info *info)
 {
 	struct proxy_data *pd = object;
 	struct remote_data *rd = pd->rd;
diff --git a/src/tools/pipewire-monitor.c b/src/tools/pipewire-monitor.c
index 2ed211872..8e145e0ab 100644
--- a/src/tools/pipewire-monitor.c
+++ b/src/tools/pipewire-monitor.c
@@ -158,7 +158,7 @@ static void on_info_changed(void *data, const struct pw_core_info *info)
 	}
 }
 
-static void module_event_info(void *object, struct pw_module_info *info)
+static void module_event_info(void *object, const struct pw_module_info *info)
 {
         struct proxy_data *data = object;
 	bool print_all, print_mark;
@@ -244,7 +244,7 @@ static void print_node(struct proxy_data *data)
 	}
 }
 
-static void node_event_info(void *object, struct pw_node_info *info)
+static void node_event_info(void *object, const struct pw_node_info *info)
 {
         struct proxy_data *data = object;
 	bool is_new = data->info == NULL;
@@ -310,7 +310,7 @@ static void print_port(struct proxy_data *data)
 	}
 }
 
-static void port_event_info(void *object, struct pw_port_info *info)
+static void port_event_info(void *object, const struct pw_port_info *info)
 {
 
         struct proxy_data *data = object;
@@ -340,7 +340,7 @@ static const struct pw_port_proxy_events port_events = {
         .param = port_event_param
 };
 
-static void factory_event_info(void *object, struct pw_factory_info *info)
+static void factory_event_info(void *object, const struct pw_factory_info *info)
 {
         struct proxy_data *data = object;
 	bool print_all, print_mark;
@@ -376,7 +376,7 @@ static const struct pw_factory_proxy_events factory_events = {
         .info = factory_event_info
 };
 
-static void client_event_info(void *object, struct pw_client_info *info)
+static void client_event_info(void *object, const struct pw_client_info *info)
 {
         struct proxy_data *data = object;
 	bool print_all, print_mark;
@@ -410,7 +410,7 @@ static const struct pw_client_proxy_events client_events = {
         .info = client_event_info
 };
 
-static void link_event_info(void *object, struct pw_link_info *info)
+static void link_event_info(void *object, const struct pw_link_info *info)
 {
         struct proxy_data *data = object;
 	bool print_all, print_mark;
@@ -460,7 +460,7 @@ static const struct pw_link_proxy_events link_events = {
 
 
 
-static void device_event_info(void *object, struct pw_device_info *info)
+static void device_event_info(void *object, const struct pw_device_info *info)
 {
         struct proxy_data *data = object;
 	bool print_all, print_mark;