applications: nrf_desktop: Update LLPM dependency in BLE conn params

Use CONFIG_CAF_BLE_USE_LLPM to allow using the module also in case BLE
controller is not part of the main application.

Jira: NCSDK-31539

Signed-off-by: Marek Pieta <[email protected]>
Signed-off-by: Pekka Niskanen <[email protected]>

Author: MarekPieta

applications/nrf_desktop/src/modules/ble_conn_params.c

@@ -8,9 +8,9 @@
 #include <zephyr/bluetooth/hci.h>
 #include <bluetooth/gatt_dm.h>
 
-#ifdef CONFIG_BT_LL_SOFTDEVICE
+#ifdef CONFIG_CAF_BLE_USE_LLPM
 #include <bluetooth/hci_vs_sdc.h>
-#endif /* CONFIG_BT_LL_SOFTDEVICE */
+#endif /* CONFIG_CAF_BLE_USE_LLPM */
 
 #define MODULE ble_conn_params
 #include <caf/events/module_state_event.h>
@@ -86,7 +86,7 @@ static int interval_reg_to_us(uint16_t reg)
 
 static int set_llpm_conn_param(struct bt_conn *conn, uint16_t latency)
 {
-#ifdef CONFIG_BT_CTLR_SDC_LLPM
+#ifdef CONFIG_CAF_BLE_USE_LLPM
 	sdc_hci_cmd_vs_conn_update_t cmd_conn_update;
 	uint16_t conn_handle;
 
@@ -106,7 +106,7 @@ static int set_llpm_conn_param(struct bt_conn *conn, uint16_t latency)
 #else
 	__ASSERT_NO_MSG(false);
 	return -ENOTSUP;
-#endif /* CONFIG_BT_CTLR_SDC_LLPM */
+#endif /* CONFIG_CAF_BLE_USE_LLPM */
 }
 
 static int set_conn_params(struct connected_peer *peer)

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -354,6 +354,9 @@ nRF Desktop
   * The :ref:`nrf_desktop_dvfs` to no longer consume the :c:struct:`ble_peer_conn_params_event`.
     This allows to propagate the event to further listeners of the same or lower priority.
     This prevents an issue where :ref:`nrf_desktop_ble_latency` is not informed about the connection parameter update (it might cause missing connection latency updates).
+  * The Low Latency Packet Mode (LLPM) dependency in the :ref:`nrf_desktop_ble_conn_params`.
+    The module relies on the :kconfig:option:`CONFIG_CAF_BLE_USE_LLPM` Kconfig option.
+    This allows using the module also when the Bluetooth LE controller is not part of the main application.
 
 * Removed: