With the module notification message the information about the notification
is provided via the mailbox with the sof_ipc4_notify_module_data struct.
It contains the module and instance id of the sender of the notification,
the event_id and optionally additional data which is module and event
specific.
At the same time add definitions to identify ALSA kcontrol change
notification.
These notifications use standardized event_id, modules must follow this if
they support such notifications:
upper 16 bit: 0xA15A as a magic identification value
lower 16 bit: param_id of the changed control
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
include/sound/sof/ipc4/header.h | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/include/sound/sof/ipc4/header.h b/include/sound/sof/ipc4/header.h
index 574a9d581f88..2c81d6dde577 100644
--- a/include/sound/sof/ipc4/header.h
+++ b/include/sound/sof/ipc4/header.h
@@ -532,6 +532,35 @@ struct sof_ipc4_notify_resource_data {
#define SOF_IPC4_DEBUG_SLOT_TELEMETRY 0x4c455400
#define SOF_IPC4_DEBUG_SLOT_BROKEN 0x44414544
+/**
+ * struct sof_ipc4_notify_module_data - payload for module notification
+ * @instance_id: instance ID of the originator module of the notification
+ * @module_id: module ID of the originator of the notification
+ * @event_id: module specific event id
+ * @event_data_size: Size of the @event_data (if any) in bytes
+ * @event_data: Optional notification data, module and notification dependent
+ */
+struct sof_ipc4_notify_module_data {
+ uint16_t instance_id;
+ uint16_t module_id;
+ uint32_t event_id;
+ uint32_t event_data_size;
+ uint8_t event_data[];
+} __packed __aligned(4);
+
+/*
+ * ALSA kcontrol change notification
+ *
+ * The event_id of struct sof_ipc4_notify_module_data is divided into two u16:
+ * upper u16: magic number for ALSA kcontrol types: 0xA15A
+ * lower u16: param_id of the control, which is the type of the control
+ * The event_data contains the struct sof_ipc4_control_msg_payload of the control
+ * which sent the notification.
+ */
+#define SOF_IPC4_NOTIFY_MODULE_EVENTID_ALSA_MAGIC_MASK GENMASK(31, 16)
+#define SOF_IPC4_NOTIFY_MODULE_EVENTID_ALSA_MAGIC_VAL 0xA15A0000
+#define SOF_IPC4_NOTIFY_MODULE_EVENTID_ALSA_PARAMID_MASK GENMASK(15, 0)
+
/** @}*/
#endif
--
2.42.1
