nv_host_ctrl: Make Sync GPU variant always return synced result.

src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp

@@ -60,6 +60,11 @@ u32 nvhost_ctrl::IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>&
     }
 
     auto& gpu = Core::System::GetInstance().GPU();
+    // This is mostly to take into account unimplemented features. As synced
+    // gpu is always synced.
+    if (!gpu.IsAsync()) {
+        return NvResult::Success;
+    }
     gpu.Guard(true);
     u32 current_syncpoint_value = gpu.GetSyncpointValue(params.syncpt_id);
     if (current_syncpoint_value >= params.threshold) {

src/video_core/gpu.cpp

@@ -29,8 +29,8 @@ u32 FramebufferConfig::BytesPerPixel(PixelFormat format) {
     UNREACHABLE();
 }
 
-GPU::GPU(Core::System& system, VideoCore::RendererBase& renderer)
+GPU::GPU(Core::System& system, VideoCore::RendererBase& renderer, bool is_async)
-    : system{system}, renderer{renderer} {
+    : system{system}, renderer{renderer}, is_async{is_async} {
     auto& rasterizer{renderer.Rasterizer()};
     memory_manager = std::make_unique<Tegra::MemoryManager>(rasterizer);
     dma_pusher = std::make_unique<Tegra::DmaPusher>(*this);

src/video_core/gpu.h

@@ -131,7 +131,7 @@ class MemoryManager;
 
 class GPU {
 public:
-    explicit GPU(Core::System& system, VideoCore::RendererBase& renderer);
+    explicit GPU(Core::System& system, VideoCore::RendererBase& renderer, bool is_async);
 
     virtual ~GPU();
 
@@ -184,6 +184,10 @@ public:
         }
     }
 
+    bool IsAsync() const {
+        return is_async;
+    }
+
     /// Returns a const reference to the GPU DMA pusher.
     const Tegra::DmaPusher& DmaPusher() const;
 
@@ -298,6 +302,8 @@ private:
     std::array<std::list<Event>, Service::Nvidia::MaxSyncPoints> events;
 
     std::mutex sync_mutex;
+
+    const bool is_async;
 };
 
 #define ASSERT_REG_POSITION(field_name, position)                                                  \

src/video_core/gpu_asynch.cpp

@@ -11,7 +11,7 @@
 namespace VideoCommon {
 
 GPUAsynch::GPUAsynch(Core::System& system, VideoCore::RendererBase& renderer)
-    : GPU(system, renderer), gpu_thread{system} {}
+    : GPU(system, renderer, true), gpu_thread{system} {}
 
 GPUAsynch::~GPUAsynch() = default;
 

src/video_core/gpu_synch.cpp

@@ -8,7 +8,7 @@
 namespace VideoCommon {
 
 GPUSynch::GPUSynch(Core::System& system, VideoCore::RendererBase& renderer)
-    : GPU(system, renderer) {}
+    : GPU(system, renderer, false) {}
 
 GPUSynch::~GPUSynch() = default;