Bluetooth: Audio: Make HAS optional notify characteristics optional

Added Kconfig options to make HAS characteristics that has notify as
optional property selectable and thus optional. These settings are
global, meaning that a chosen notify property will be used for all
registered has instances.

Signed-off-by: Fredrik Danebjer <frdn@demant.com>

include/zephyr/bluetooth/audio/has.h

@@ -68,8 +68,8 @@ enum bt_has_capabilities {
 	BT_HAS_PRESET_SUPPORT = BIT(0),
 };
 
-/** @brief Structure for registering a Hearing Access Service instance. */
-struct bt_has_register_param {
+/** @brief Structure for registering features of a Hearing Access Service instance. */
+struct bt_has_features_param {
 	/** Hearing Aid Type value */
 	enum bt_has_hearing_aid_type type;
 
@@ -341,11 +341,11 @@ struct bt_has_preset_register_param {
 /**
  * @brief Register the Hearing Access Service instance.
  *
- * @param param     Hearing Access Service register parameters.
+ * @param features     Hearing Access Service register parameters.
  *
  * @return 0 if success, errno on failure.
  */
-int bt_has_register(const struct bt_has_register_param *param);
+int bt_has_register(const struct bt_has_features_param *features);
 
 /**
  * @brief Register preset.
@@ -470,6 +470,17 @@ static inline int bt_has_preset_active_clear(void)
  */
 int bt_has_preset_name_change(uint8_t index, const char *name);
 
+/**
+ * @brief Change the Hearing Aid Features.
+ *
+ * Change the hearing aid features.
+ *
+ * @param features The features to be set.
+ *
+ * @return 0 in case of success or negative value in case of error.
+ */
+int bt_has_features_set(const struct bt_has_features_param *features);
+
 #ifdef __cplusplus
 }
 #endif

samples/bluetooth/hap_ha/src/has_server.c

@@ -75,7 +75,7 @@ int has_server_preset_init(void)
 	return 0;
 }
 
-static struct bt_has_register_param param = {
+static struct bt_has_features_param features = {
 	.type = BT_HAS_HEARING_AID_TYPE_MONAURAL,
 	.preset_sync_support = false,
 	.independent_presets = false
@@ -86,12 +86,12 @@ int has_server_init(void)
 	int err;
 
 	if (IS_ENABLED(CONFIG_HAP_HA_HEARING_AID_BINAURAL)) {
-		param.type = BT_HAS_HEARING_AID_TYPE_BINAURAL;
+		features.type = BT_HAS_HEARING_AID_TYPE_BINAURAL;
 	} else if (IS_ENABLED(CONFIG_HAP_HA_HEARING_AID_BANDED)) {
-		param.type = BT_HAS_HEARING_AID_TYPE_BANDED;
+		features.type = BT_HAS_HEARING_AID_TYPE_BANDED;
 	}
 
-	err = bt_has_register(&param);
+	err = bt_has_register(&features);
 	if (err) {
 		return err;
 	}

subsys/bluetooth/audio/Kconfig.has

@@ -15,6 +15,12 @@ menuconfig BT_HAS
 
 if BT_HAS
 
+config BT_HAS_FEATURES_NOTIFIABLE
+	bool "Hearing Aid Features Notifiable Support"
+	help
+	  This option enables support for clients to subscribe for notifications
+	  on the Hearing Aid Features characteristic.
+
 config BT_HAS_PRESET_COUNT
 	int "Preset record list size"
 	default 2
@@ -33,6 +39,18 @@ config BT_HAS_PRESET_NAME_DYNAMIC
 	help
 	  Enabling this option allows for runtime configuration of preset name.
 
+config BT_HAS_PRESET_CONTROL_POINT_NOTIFIABLE
+	bool "Preset Control Point Notifiable support"
+	depends on BT_HAS_PRESET_SUPPORT && BT_EATT
+	help
+	  This option enables support for clients to subscribe for notifications
+	  on the Hearing Aid Preset Control Point characteristic.
+
+config BT_HAS_ACTIVE_PRESET_INDEX
+	def_bool BT_HAS_PRESET_SUPPORT
+	help
+	  This option enables the Hearing Aid Active Preset Index characteristic.
+
 endif # BT_HAS_PRESET_SUPPORT
 
 endif # BT_HAS