From 3555cd68b2566530d70b00b9fe5c52cfd6ca7032 Mon Sep 17 00:00:00 2001
From: Craig Carnell <1188869+cscd98@users.noreply.github.com>
Date: Tue, 10 Feb 2026 12:03:23 +0000
Subject: [PATCH] libretro: fix bluetooth passthrough mode

---
 .../Core/DolphinLibretro/Common/Options.cpp   |  2 +-
 Source/Core/DolphinLibretro/Input.cpp         | 22 +++++++++++++++----
 Source/Core/DolphinLibretro/Input.h           |  1 +
 Source/Core/DolphinLibretro/Main.cpp          |  4 +++-
 4 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/Source/Core/DolphinLibretro/Common/Options.cpp b/Source/Core/DolphinLibretro/Common/Options.cpp
index 78637fbf1c9c..fc1f0f1224b7 100644
--- a/Source/Core/DolphinLibretro/Common/Options.cpp
+++ b/Source/Core/DolphinLibretro/Common/Options.cpp
@@ -519,7 +519,7 @@ static struct retro_core_option_v2_definition option_defs[] = {
     Libretro::Options::main_bluetooth::BLUETOOTH_PASSTHROUGH,
     "System Configuration > Bluetooth passthrough mode",
     "Bluetooth passthrough mode",
-    "Pass all traffic directly to the host's Bluetooth adapter. This might CRASH if your adaptor is not compatible.",
+    "Pass all traffic directly to the host's Bluetooth adapter. Press F12 to begin the sync process.",
     nullptr,
     CATEGORY_SYSCONF,
     {
diff --git a/Source/Core/DolphinLibretro/Input.cpp b/Source/Core/DolphinLibretro/Input.cpp
index e1d3090a53d9..4c20bc91c2ea 100644
--- a/Source/Core/DolphinLibretro/Input.cpp
+++ b/Source/Core/DolphinLibretro/Input.cpp
@@ -8,6 +8,7 @@
 #include "Common/IniFile.h"
 #include "Common/Logging/Log.h"
 #include "Core/Config/MainSettings.h"
+#include "Core/Config/WiimoteSettings.h"
 #include "Core/ConfigManager.h"
 #include "Core/FreeLookManager.h"
 #include "Core/HW/GBAPad.h"
@@ -21,8 +22,10 @@
 #include "Core/HW/WiimoteReal/WiimoteReal.h"
 #include "Core/HW/SI/SI.h"
 #include "Core/HW/SI/SI_Device.h"
+#include "Core/IOS/USB/Bluetooth/BTReal.h"
 #include "Core/Host.h"
 #include "Core/System.h"
+#include "Core/WiiUtils.h"
 #include "DolphinLibretro/Input.h"
 #include "DolphinLibretro/Common/Options.h"
 #include "InputCommon/ControlReference/ControlReference.h"
@@ -34,10 +37,6 @@
 #include "InputCommon/GCAdapter.h"
 #include "InputCommon/GCPadStatus.h"
 #include "InputCommon/InputConfig.h"
-#include "Core/Config/WiimoteSettings.h"
-
-//#include "UICommon/UICommon.h"
-//#include "Core/HotkeyManager.h"
 
 #define RETRO_DEVICE_WIIMOTE RETRO_DEVICE_JOYPAD
 #define RETRO_DEVICE_WIIMOTE_SW ((2 << 8) | RETRO_DEVICE_JOYPAD)
@@ -581,6 +580,21 @@ void ResetControllers()
     retro_set_controller_port_device(port, input_types[port]);
 }
 
+void BluetoothPassthroughBind()
+{
+  static bool was_pressed = false;
+  bool sync = Libretro::Input::input_cb(0, RETRO_DEVICE_KEYBOARD, 0, RETROK_F12);
+
+  if (sync && !was_pressed)
+  {
+    auto bt_real = WiiUtils::GetBluetoothRealDevice();
+    if (bt_real)
+      bt_real->TriggerSyncButtonPressedEvent();
+  }
+
+  was_pressed = sync;
+}
+
 }  // namespace Input
 }  // namespace Libretro
 
diff --git a/Source/Core/DolphinLibretro/Input.h b/Source/Core/DolphinLibretro/Input.h
index 95f6fa8ccc35..51d7beae3810 100644
--- a/Source/Core/DolphinLibretro/Input.h
+++ b/Source/Core/DolphinLibretro/Input.h
@@ -12,5 +12,6 @@ void InitStage2();
 void Update();
 void Shutdown();
 void ResetControllers();
+void BluetoothPassthroughBind();
 }
 }
diff --git a/Source/Core/DolphinLibretro/Main.cpp b/Source/Core/DolphinLibretro/Main.cpp
index a3475d24ffce..14260d26e7e1 100644
--- a/Source/Core/DolphinLibretro/Main.cpp
+++ b/Source/Core/DolphinLibretro/Main.cpp
@@ -36,7 +36,6 @@
 #include "VideoCommon/VideoConfig.h"
 #include "VideoCommon/Widescreen.h"
 #include "Core/Boot/Boot.h"
-#include "Core/HW/CPU.h"
 
 #ifdef PERF_TEST
 static struct retro_perf_callback perf_cb;
@@ -245,6 +244,9 @@ void retro_run(void)
     WiimoteReal::Initialize(Wiimote::InitializeMode::DO_NOT_WAIT_FOR_WIIMOTES);
   }
 
+  if (Config::Get(Config::MAIN_BLUETOOTH_PASSTHROUGH_ENABLED))
+    Libretro::Input::BluetoothPassthroughBind();
+
   RETRO_PERFORMANCE_INIT(dolphin_main_func);
   RETRO_PERFORMANCE_START(dolphin_main_func);