From 4631a14c446dcd5a7e27ddcdaed0ca9783e38172 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Sat, 18 Jul 2026 04:12:13 +1000
Subject: [PATCH] [idd] implement config reload

---
 idd/LGIdd/CPipeServer.cpp | 17 +++++++++++++++--
 idd/LGIdd/CPipeServer.h   |  9 ++++++++-
 idd/LGIdd/Device.cpp      |  5 +++++
 3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/idd/LGIdd/CPipeServer.cpp b/idd/LGIdd/CPipeServer.cpp
index 1b260212..a47f4977 100644
--- a/idd/LGIdd/CPipeServer.cpp
+++ b/idd/LGIdd/CPipeServer.cpp
@@ -20,6 +20,7 @@
 
 #include "CPipeServer.h"
 #include "CDebug.h"
+#include "CIndirectDeviceContext.h"
 
 CPipeServer g_pipe;
 
@@ -257,7 +258,19 @@ void CPipeServer::WriteMsg(const LGPipeMsg & msg)
 
 void CPipeServer::HandleReloadSettings()
 {
-  DEBUG_INFO("TODO: reload settings");
+  DEBUG_INFO("Reloading settings");
+
+  AcquireSRWLockShared(&m_deviceContextLock);
+  if (m_deviceContext)
+    m_deviceContext->ReplugMonitor();
+  ReleaseSRWLockShared(&m_deviceContextLock);
+}
+
+void CPipeServer::SetDeviceContext(CIndirectDeviceContext* context)
+{
+  AcquireSRWLockExclusive(&m_deviceContextLock);
+  m_deviceContext = context;
+  ReleaseSRWLockExclusive(&m_deviceContextLock);
 }
 
 void CPipeServer::SetCursorPos(uint32_t x, uint32_t y)
@@ -292,4 +305,4 @@ void CPipeServer::SetGPUStatus(bool software)
   msg.type               = LGPipeMsg::GPUSTATUS;
   msg.gpuStatus.software = software;
   WriteMsg(msg);
-}
\ No newline at end of file
+}
diff --git a/idd/LGIdd/CPipeServer.h b/idd/LGIdd/CPipeServer.h
index d1dfacd6..f509f0a0 100644
--- a/idd/LGIdd/CPipeServer.h
+++ b/idd/LGIdd/CPipeServer.h
@@ -32,6 +32,8 @@ using namespace Microsoft::WRL;
 using namespace Microsoft::WRL::Wrappers;
 using namespace Microsoft::WRL::Wrappers::HandleTraits;
 
+class CIndirectDeviceContext;
+
 class CPipeServer
 {
   private:
@@ -43,6 +45,9 @@ class CPipeServer
     bool m_running   = false;
     bool m_connected = false;
 
+    SRWLOCK                 m_deviceContextLock = SRWLOCK_INIT;
+    CIndirectDeviceContext* m_deviceContext     = nullptr;
+
     void _DeInit();
 
     static DWORD WINAPI _pipeThread(LPVOID lpParam) { ((CPipeServer*)lpParam)->Thread(); return 0; }
@@ -58,9 +63,11 @@ class CPipeServer
     bool Init();
     void DeInit();
 
+    void SetDeviceContext(CIndirectDeviceContext* context);
+
     void SetCursorPos(uint32_t x, uint32_t y);
     void SetDisplayMode(uint32_t width, uint32_t height, uint32_t refresh);
     void SetGPUStatus(bool software);
 };
 
-extern CPipeServer g_pipe;
\ No newline at end of file
+extern CPipeServer g_pipe;
diff --git a/idd/LGIdd/Device.cpp b/idd/LGIdd/Device.cpp
index 8335ba46..e4142763 100644
--- a/idd/LGIdd/Device.cpp
+++ b/idd/LGIdd/Device.cpp
@@ -32,6 +32,7 @@
 #include "CDebug.h"
 #include "CIndirectDeviceContext.h"
 #include "CIndirectMonitorContext.h"
+#include "CPipeServer.h"
 #include "CSettings.h"
 
 WDFDEVICE l_wdfDevice = nullptr;
@@ -74,6 +75,7 @@ NTSTATUS LGIddAdapterInitFinished(IDDCX_ADAPTER adapter, const IDARG_IN_ADAPTER_
     return STATUS_SUCCESS;
 
   wrapper->context->FinishInit(0);
+  g_pipe.SetDeviceContext(wrapper->context);
   return STATUS_SUCCESS;
 }
 
@@ -256,7 +258,10 @@ NTSTATUS LGIddCreateDevice(_Inout_ PWDFDEVICE_INIT deviceInit)
   {
     auto * wrapper = WdfObjectGet_CIndirectDeviceContextWrapper(object);
     if (wrapper)
+    {
+      g_pipe.SetDeviceContext(nullptr);
       wrapper->Cleanup();
+    }
     l_wdfDevice = nullptr;
   };