Adjust the default discovery timeout when BLE extend announcement is enabled. (#32300)

* add build arg to enable BLE extended advertisement feature

* Set a increased based value for the Discovery timeout when BLE extended advertising is set

Author: jmartinez-silabs

src/include/platform/CHIPDeviceConfig.h

@@ -713,8 +713,19 @@ static_assert(CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN <= CHIP_DEVICE
  * Time in seconds that a factory new device will advertise commissionable node discovery.
  */
 #ifndef CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+/**
+ * By default, the extended announcement, when enabled, starts its extended advertising 15 mins
+ * after the standard slow advertisement. Time at which the default discovery time would close the
+ * commissioning window and stop the BLE.
+ * Therefore, when CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING is enabled bump the default Discovery timeout
+ * to the maximum allowed by the spec. 48h.
+ */
+#define CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS (60 * 60 * 48)
+#else
 #define CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS (15 * 60)
-#endif
+#endif // CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+#endif // CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS
 
 /**
  * CHIP_DEVICE_CONFIG_MAX_DISCOVERED_NODES

src/platform/silabs/CHIPDevicePlatformConfig.h

@@ -140,6 +140,8 @@
 
 #define CHIP_DEVICE_CONFIG_MAX_EVENT_QUEUE_SIZE 25
 
+#define CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING SL_MATTER_BLE_EXTENDED_ADV
+
 /*
     ICD Configuration Defines
 */

third_party/silabs/efr32_sdk.gni

@@ -46,6 +46,9 @@ declare_args() {
   # Enable Segger System View
   use_system_view = false
 
+  # Enable the BLE extended advertisement
+  sl_matter_ble_extended_adv = false
+
   # ICD Openthread Configuration flags
   sl_ot_idle_interval_ms = 15000  # 15s Idle Intervals
   sl_ot_active_interval_ms = 200  # 200ms Active Intervals
@@ -297,6 +300,7 @@ template("efr32_sdk") {
       "SL_RAIL_LIB_MULTIPROTOCOL_SUPPORT=1",
       "SL_RAIL_UTIL_PA_CONFIG_HEADER=<sl_rail_util_pa_config.h>",
       "RADIO_CONFIG_DMP_SUPPORT=1",
+      "SL_MATTER_BLE_EXTENDED_ADV=${sl_matter_ble_extended_adv}",
 
       #"__STACK_SIZE=0",
     ]