General: Correct rebase, sync gpu and context management.

src/video_core/gpu.h

@@ -284,6 +284,12 @@ public:
     /// core timing events.
     virtual void Start() = 0;
 
+    /// Obtain the CPU Context
+    virtual void ObtainContext() = 0;
+
+    /// Release the CPU Context
+    virtual void ReleaseContext() = 0;
+
     /// Push GPU command entries to be processed
     virtual void PushGPUEntries(Tegra::CommandList&& entries) = 0;
 

src/video_core/gpu_asynch.cpp

@@ -19,10 +19,17 @@ GPUAsynch::GPUAsynch(Core::System& system, std::unique_ptr<VideoCore::RendererBa
 GPUAsynch::~GPUAsynch() = default;
 
 void GPUAsynch::Start() {
-    cpu_context->MakeCurrent();
     gpu_thread.StartThread(*renderer, *gpu_context, *dma_pusher);
 }
 
+void GPUAsynch::ObtainContext() {
+    cpu_context->MakeCurrent();
+}
+
+void GPUAsynch::ReleaseContext() {
+    cpu_context->DoneCurrent();
+}
+
 void GPUAsynch::PushGPUEntries(Tegra::CommandList&& entries) {
     gpu_thread.SubmitList(std::move(entries));
 }

src/video_core/gpu_asynch.h

@@ -25,6 +25,8 @@ public:
     ~GPUAsynch() override;
 
     void Start() override;
+    void ObtainContext() override;
+    void ReleaseContext() override;
     void PushGPUEntries(Tegra::CommandList&& entries) override;
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer) override;
     void FlushRegion(VAddr addr, u64 size) override;

src/video_core/gpu_synch.cpp

@@ -13,10 +13,16 @@ GPUSynch::GPUSynch(Core::System& system, std::unique_ptr<VideoCore::RendererBase
 
 GPUSynch::~GPUSynch() = default;
 
-void GPUSynch::Start() {
+void GPUSynch::Start() {}
+
+void GPUSynch::ObtainContext() {
     context->MakeCurrent();
 }
 
+void GPUSynch::ReleaseContext() {
+    context->DoneCurrent();
+}
+
 void GPUSynch::PushGPUEntries(Tegra::CommandList&& entries) {
     dma_pusher->Push(std::move(entries));
     dma_pusher->DispatchCalls();

src/video_core/gpu_synch.h

@@ -24,6 +24,8 @@ public:
     ~GPUSynch() override;
 
     void Start() override;
+    void ObtainContext() override;
+    void ReleaseContext() override;
     void PushGPUEntries(Tegra::CommandList&& entries) override;
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer) override;
     void FlushRegion(VAddr addr, u64 size) override;