Revert "gpu_thread: Don't spin wait if there are no GPU commands."

src/video_core/gpu_thread.cpp

@@ -31,22 +31,24 @@ static void RunThread(VideoCore::RendererBase& renderer, Tegra::DmaPusher& dma_p
 
     CommandDataContainer next;
     while (state.is_running) {
-        next = state.queue.PopWait();
-        if (const auto submit_list = std::get_if<SubmitListCommand>(&next.data)) {
-            dma_pusher.Push(std::move(submit_list->entries));
-            dma_pusher.DispatchCalls();
-        } else if (const auto data = std::get_if<SwapBuffersCommand>(&next.data)) {
-            renderer.SwapBuffers(data->framebuffer ? &*data->framebuffer : nullptr);
-        } else if (const auto data = std::get_if<FlushRegionCommand>(&next.data)) {
-            renderer.Rasterizer().FlushRegion(data->addr, data->size);
-        } else if (const auto data = std::get_if<InvalidateRegionCommand>(&next.data)) {
-            renderer.Rasterizer().InvalidateRegion(data->addr, data->size);
-        } else if (std::holds_alternative<EndProcessingCommand>(next.data)) {
-            return;
-        } else {
-            UNREACHABLE();
+        while (!state.queue.Empty()) {
+            state.queue.Pop(next);
+            if (const auto submit_list = std::get_if<SubmitListCommand>(&next.data)) {
+                dma_pusher.Push(std::move(submit_list->entries));
+                dma_pusher.DispatchCalls();
+            } else if (const auto data = std::get_if<SwapBuffersCommand>(&next.data)) {
+                renderer.SwapBuffers(data->framebuffer ? &*data->framebuffer : nullptr);
+            } else if (const auto data = std::get_if<FlushRegionCommand>(&next.data)) {
+                renderer.Rasterizer().FlushRegion(data->addr, data->size);
+            } else if (const auto data = std::get_if<InvalidateRegionCommand>(&next.data)) {
+                renderer.Rasterizer().InvalidateRegion(data->addr, data->size);
+            } else if (std::holds_alternative<EndProcessingCommand>(next.data)) {
+                return;
+            } else {
+                UNREACHABLE();
+            }
+            state.signaled_fence.store(next.fence);
         }
-        state.signaled_fence.store(next.fence);
     }
 }