From 52e9d7fa49c1da30ece8909d80e3aeafeda2760e Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sun, 28 Feb 2021 22:03:00 -0500
Subject: [PATCH] gpu_thread: Remove Async NVDEC placeholders

This commit removes early placeholders for an implementation of async nvdec. With recent changes to the source code, the placeholders are no longer accurate, and can cause a nullptr dereference due to the nature of the cdma_pusher lifetime.
---
 src/video_core/gpu.cpp        |  2 +-
 src/video_core/gpu_thread.cpp | 13 +++----------
 src/video_core/gpu_thread.h   | 19 ++++---------------
 3 files changed, 8 insertions(+), 26 deletions(-)

diff --git a/src/video_core/gpu.cpp b/src/video_core/gpu.cpp
index 51c63af4ae..c61f446196 100644
--- a/src/video_core/gpu.cpp
+++ b/src/video_core/gpu.cpp
@@ -459,7 +459,7 @@ void GPU::ProcessSemaphoreAcquire() {
 }
 
 void GPU::Start() {
-    gpu_thread.StartThread(*renderer, renderer->Context(), *dma_pusher, *cdma_pusher);
+    gpu_thread.StartThread(*renderer, renderer->Context(), *dma_pusher);
     cpu_context = renderer->GetRenderWindow().CreateSharedContext();
     cpu_context->MakeCurrent();
 }
diff --git a/src/video_core/gpu_thread.cpp b/src/video_core/gpu_thread.cpp
index eb0e43c0cd..99353f15f5 100644
--- a/src/video_core/gpu_thread.cpp
+++ b/src/video_core/gpu_thread.cpp
@@ -19,7 +19,7 @@ namespace VideoCommon::GPUThread {
 /// Runs the GPU thread
 static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
                       Core::Frontend::GraphicsContext& context, Tegra::DmaPusher& dma_pusher,
-                      SynchState& state, Tegra::CDmaPusher& cdma_pusher) {
+                      SynchState& state) {
     std::string name = "yuzu:GPU";
     MicroProfileOnThreadCreate(name.c_str());
     SCOPE_EXIT({ MicroProfileOnThreadExit(); });
@@ -46,9 +46,6 @@ static void RunThread(Core::System& system, VideoCore::RendererBase& renderer,
         if (auto* submit_list = std::get_if<SubmitListCommand>(&next.data)) {
             dma_pusher.Push(std::move(submit_list->entries));
             dma_pusher.DispatchCalls();
-        } else if (auto* command_list = std::get_if<SubmitChCommandEntries>(&next.data)) {
-            // NVDEC
-            cdma_pusher.ProcessEntries(std::move(command_list->entries));
         } else if (const auto* data = std::get_if<SwapBuffersCommand>(&next.data)) {
             renderer.SwapBuffers(data->framebuffer ? &*data->framebuffer : nullptr);
         } else if (std::holds_alternative<OnCommandListEndCommand>(next.data)) {
@@ -83,20 +80,16 @@ ThreadManager::~ThreadManager() {
 
 void ThreadManager::StartThread(VideoCore::RendererBase& renderer,
                                 Core::Frontend::GraphicsContext& context,
-                                Tegra::DmaPusher& dma_pusher, Tegra::CDmaPusher& cdma_pusher) {
+                                Tegra::DmaPusher& dma_pusher) {
     rasterizer = renderer.ReadRasterizer();
     thread = std::thread(RunThread, std::ref(system), std::ref(renderer), std::ref(context),
-                         std::ref(dma_pusher), std::ref(state), std::ref(cdma_pusher));
+                         std::ref(dma_pusher), std::ref(state));
 }
 
 void ThreadManager::SubmitList(Tegra::CommandList&& entries) {
     PushCommand(SubmitListCommand(std::move(entries)));
 }
 
-void ThreadManager::SubmitCommandBuffer(Tegra::ChCommandHeaderList&& entries) {
-    PushCommand(SubmitChCommandEntries(std::move(entries)));
-}
-
 void ThreadManager::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
     PushCommand(SwapBuffersCommand(framebuffer ? std::make_optional(*framebuffer) : std::nullopt));
 }
diff --git a/src/video_core/gpu_thread.h b/src/video_core/gpu_thread.h
index 4cd951169d..18269e51c4 100644
--- a/src/video_core/gpu_thread.h
+++ b/src/video_core/gpu_thread.h
@@ -43,14 +43,6 @@ struct SubmitListCommand final {
     Tegra::CommandList entries;
 };
 
-/// Command to signal to the GPU thread that a cdma command list is ready for processing
-struct SubmitChCommandEntries final {
-    explicit SubmitChCommandEntries(Tegra::ChCommandHeaderList&& entries_)
-        : entries{std::move(entries_)} {}
-
-    Tegra::ChCommandHeaderList entries;
-};
-
 /// Command to signal to the GPU thread that a swap buffers is pending
 struct SwapBuffersCommand final {
     explicit SwapBuffersCommand(std::optional<const Tegra::FramebufferConfig> framebuffer_)
@@ -91,9 +83,9 @@ struct OnCommandListEndCommand final {};
 struct GPUTickCommand final {};
 
 using CommandData =
-    std::variant<EndProcessingCommand, SubmitListCommand, SubmitChCommandEntries,
-                 SwapBuffersCommand, FlushRegionCommand, InvalidateRegionCommand,
-                 FlushAndInvalidateRegionCommand, OnCommandListEndCommand, GPUTickCommand>;
+    std::variant<EndProcessingCommand, SubmitListCommand, SwapBuffersCommand, FlushRegionCommand,
+                 InvalidateRegionCommand, FlushAndInvalidateRegionCommand, OnCommandListEndCommand,
+                 GPUTickCommand>;
 
 struct CommandDataContainer {
     CommandDataContainer() = default;
@@ -123,14 +115,11 @@ public:
 
     /// Creates and starts the GPU thread.
     void StartThread(VideoCore::RendererBase& renderer, Core::Frontend::GraphicsContext& context,
-                     Tegra::DmaPusher& dma_pusher, Tegra::CDmaPusher& cdma_pusher);
+                     Tegra::DmaPusher& dma_pusher);
 
     /// Push GPU command entries to be processed
     void SubmitList(Tegra::CommandList&& entries);
 
-    /// Push GPU CDMA command buffer entries to be processed
-    void SubmitCommandBuffer(Tegra::ChCommandHeaderList&& entries);
-
     /// Swap buffers (render frame)
     void SwapBuffers(const Tegra::FramebufferConfig* framebuffer);