From d97d409647686aefe701aec1363e328be11d1443 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 1 Jul 2022 02:18:33 +0200
Subject: NvHostChannels: improve hack for supporting multiple channels.

---
 src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.cpp | 10 ++++++++--
 src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h   |  3 +++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.cpp b/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.cpp
index fe83423d5..2ec1ad3e9 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.cpp
@@ -47,15 +47,21 @@ std::size_t WriteVectors(std::vector<u8>& dst, const std::vector<T>& src, std::s
 } // Anonymous namespace
 
 std::unordered_map<DeviceFD, u32> nvhost_nvdec_common::fd_to_id{};
+std::deque<u32> nvhost_nvdec_common::syncpts_accumulated{};
 
 nvhost_nvdec_common::nvhost_nvdec_common(Core::System& system_, NvCore::Container& core_,
                                          NvCore::ChannelType channel_type_)
     : nvdevice{system_}, core{core_}, syncpoint_manager{core.GetSyncpointManager()},
       nvmap{core.GetNvMapFile()}, channel_type{channel_type_} {
-    channel_syncpoint = syncpoint_manager.AllocateSyncpoint(false);
+    if (syncpts_accumulated.empty()) {
+        channel_syncpoint = syncpoint_manager.AllocateSyncpoint(false);
+    } else {
+        channel_syncpoint = syncpts_accumulated.front();
+        syncpts_accumulated.pop_front();
+    }
 }
 nvhost_nvdec_common::~nvhost_nvdec_common() {
-    syncpoint_manager.FreeSyncpoint(channel_syncpoint);
+    syncpts_accumulated.push_back(channel_syncpoint);
 }
 
 NvResult nvhost_nvdec_common::SetNVMAPfd(const std::vector<u8>& input) {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h b/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h
index 4046b0e13..93990bb9b 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h
@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <deque>
 #include <vector>
 #include "common/common_types.h"
 #include "common/swap.h"
@@ -127,6 +128,8 @@ protected:
     NvCore::NvMap& nvmap;
     NvCore::ChannelType channel_type;
     std::array<u32, MaxSyncPoints> device_syncpoints{};
+
+    static std::deque<u32> syncpts_accumulated;
 };
 }; // namespace Devices
 } // namespace Service::Nvidia
-- 
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