[d3d11] Do not use separate context to initialize back buffers

src/d3d11/d3d11_context_imm.cpp

@@ -30,6 +30,10 @@ namespace dxvk {
 
       ctx->setBarrierControl(cBarrierControlFlags);
     });
+
+    // Stall here so that external submissions to the
+    // CS thread can actually access the command list
+    SynchronizeCsThread(DxvkCsThread::SynchronizeAll);
     
     ClearState();
   }

src/d3d11/d3d11_context_imm.h

@@ -101,6 +101,15 @@ namespace dxvk {
             DxvkCsChunkRef&&            Chunk,
             bool                        Synchronize);
 
+    template<typename Fn>
+    void InjectCsCommand(
+            Fn&&                        Command) {
+      auto chunk = AllocCsChunk();
+      chunk->push(std::move(Command));
+
+      EmitCsChunkExternal(std::move(chunk), false);
+    }
+
   private:
     
     DxvkCsThread            m_csThread;

src/d3d11/d3d11_swapchain.cpp

@@ -626,22 +626,13 @@ namespace dxvk {
     
     // Initialize the image so that we can use it. Clearing
     // to black prevents garbled output for the first frame.
-    VkImageSubresourceRange subresources;
+    m_parent->GetContext()->InjectCsCommand([
-    subresources.aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT;
+      cSwapImage = m_swapImage
-    subresources.baseMipLevel   = 0;
+    ] (DxvkContext* ctx) {
-    subresources.levelCount     = 1;
+      ctx->initImage(cSwapImage,
-    subresources.baseArrayLayer = 0;
+        cSwapImage->getAvailableSubresources(),
-    subresources.layerCount     = 1;
+        VK_IMAGE_LAYOUT_UNDEFINED);
-
+    });
-    m_context->beginRecording(
-      m_device->createCommandList());
-    
-    m_context->initImage(m_swapImage,
-      subresources, VK_IMAGE_LAYOUT_UNDEFINED);
-
-    m_device->submitCommandList(
-      m_context->endRecording(),
-      nullptr);
   }