ipc4: notification: Add function to prepare mixer underrun notification

Add function preparing ipc4 notification about underrun detected by mixer.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

Author: softwarecki

src/include/ipc4/notification.h

@@ -242,6 +242,19 @@ struct ipc4_process_data_error_event_data {
 	uint32_t error_code;
 };
 
+/**
+ * \brief This notification is sent by the mixer on stream underrun detection. The frequency of
+ * sending this notification by Mixer depends on the MixIn settings.
+ */
+struct ipc4_mixer_underrun_event_data {
+	/* Indicates EndOfStream */
+	uint32_t eos_flag;
+	/* Data processed by module (in bytes) */
+	uint32_t data_mixed;
+	/* Expected data to be processed (in bytes) */
+	uint32_t expected_data_mixed;
+};
+
 /**
  * \brief Input data payload is reserved field in parent technical spec which can be easily
  * extendable if needed by specific resource event types in the future. For backward compatibility
@@ -252,6 +265,8 @@ union ipc4_resource_event_data {
 	uint32_t dws[6];
 	/* Process Data Error Data (res type = MODULE_INSTANCE) */
 	struct ipc4_process_data_error_event_data process_data_error;
+	/* Mixer Underrun Detected Data (res type = PIPELINE) */
+	struct ipc4_mixer_underrun_event_data mixer_underrun;
 };
 
 struct ipc4_resource_event_data_notification {
@@ -279,4 +294,7 @@ void copier_gateway_overrun_notif_msg_init(struct ipc_msg *msg, uint32_t pipelin
 void gateway_underrun_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id);
 void gateway_overrun_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id);
 
+void mixer_underrun_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id, uint32_t eos_flag,
+				   uint32_t data_mixed, uint32_t expected_data_mixed);
+
 #endif /* __IPC4_NOTIFICATION_H__ */

src/ipc/ipc4/notification.c

@@ -64,6 +64,20 @@ void gateway_overrun_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id)
 	notif_data->resource_type = SOF_IPC4_GATEWAY;
 }
 
+void mixer_underrun_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id, uint32_t eos_flag,
+				   uint32_t data_mixed, uint32_t expected_data_mixed)
+{
+	struct ipc4_resource_event_data_notification *notif_data = msg->tx_data;
+
+	resource_notif_header_init(msg);
+	notif_data->resource_id = resource_id;
+	notif_data->event_type = SOF_IPC4_MIXER_UNDERRUN_DETECTED;
+	notif_data->resource_type = SOF_IPC4_PIPELINE;
+	notif_data->event_data.mixer_underrun.eos_flag = eos_flag;
+	notif_data->event_data.mixer_underrun.data_mixed = data_mixed;
+	notif_data->event_data.mixer_underrun.expected_data_mixed = expected_data_mixed;
+}
+
 void process_data_error_notif_msg_init(struct ipc_msg *msg, uint32_t resource_id,
 				       uint32_t error_code)
 {