Fixes & memory optimizations (#540)

- Disable BlueTooth driver by default, to ensure it doesn't allocate memory
- Update BlueTooth settings app behaviour to make sure it starts/stops the devices
- Disable SPI RAM usage for ST7789 as it broke App Hub
- Reduce T-Display and T-Deck display buffers from 1/3rd to 1/10th of resolution
- Enabled dynamic buffers for MbedTLS to optimize memory
- TLS 1.3 did not work with dynamic buffers: downgrade to 1.2 for now
- WiFi is now enabled from the Boot app callback to the WiFi service, instead of the WiFi service start() function. This avoids a lockup when WiFi is started by the service while the Boot app is updating the WiFi settings.

Tactility/Source/app/btmanage/BtManage.cpp

@@ -16,14 +16,21 @@ static const auto LOGGER = Logger("BtManage");
 
 extern const AppManifest manifest;
 
-static void onBtToggled(bool enabled) {
-    struct Device* dev = bluetooth::findFirstDevice();
+static void onBtToggled(bool requestOn) {
+#if defined(CONFIG_BT_NIMBLE_ENABLED)
+    Device* dev = device_find_first_by_type(&BLUETOOTH_TYPE);
     if (!dev) return;
-    bluetooth_set_radio_enabled(dev, enabled);
+    bool radio_on = bluetooth::isRadioOnOrPending(dev);
+    if (requestOn && !radio_on) {
+        bluetooth::start(dev);
+    } else if (!requestOn && radio_on) {
+        bluetooth::stop(dev);
+    }
+#endif
 }
 
 static void onScanToggled(bool enabled) {
-    struct Device* dev = bluetooth::findFirstDevice();
+    Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE);
     if (!dev) return;
     if (enabled) {
         bluetooth_scan_start(dev);
@@ -108,7 +115,7 @@ void BtManage::onBtEvent(const struct BtEvent& event) {
         case BT_EVENT_RADIO_STATE_CHANGED:
             if (event.radio_state == BT_RADIO_STATE_ON) {
                 getState().updatePairedPeers();
-                struct Device* dev = bluetooth::findFirstDevice();
+                Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE);
                 if (dev && !bluetooth_is_scanning(dev)) {
                     bluetooth_scan_start(dev);
                 }
@@ -121,7 +128,7 @@ void BtManage::onBtEvent(const struct BtEvent& event) {
     requestViewUpdate();
 }
 
-static void onKernelBtEvent(struct Device* /*device*/, void* context, struct BtEvent event) {
+static void onKernelBtEvent(Device* /*device*/, void* context, BtEvent event) {
     // BT event callbacks can fire from the NimBLE host task (e.g. DISCONNECT during
     // nimble_port_stop shutdown). Calling onBtEvent() synchronously from the NimBLE
     // task would block it on the LVGL mutex (held by the LVGL task waiting in
@@ -137,7 +144,7 @@ void BtManage::onShow(AppContext& app, lv_obj_t* parent) {
     // Initialise state and view before subscribing to avoid incoming events
     // racing with state initialisation.
     state.setRadioState(bluetooth::getRadioState());
-    struct Device* dev = bluetooth::findFirstDevice();
+    Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE);
     state.setScanning(dev ? bluetooth_is_scanning(dev) : false);
     state.updateScanResults();
     state.updatePairedPeers();