diff --git a/src/Core/PS4/HLE/ErrorCodes.h b/src/Core/PS4/HLE/ErrorCodes.h
index 9b7d65b8..04edb64e 100644
--- a/src/Core/PS4/HLE/ErrorCodes.h
+++ b/src/Core/PS4/HLE/ErrorCodes.h
@@ -1,7 +1,7 @@
 #pragma once
 constexpr int SCE_OK = 0;
 
-constexpr int SCE_KERNEL_ERROR_EBADF  = 0x80020009;
+constexpr int SCE_KERNEL_ERROR_EBADF = 0x80020009;
 constexpr int SCE_KERNEL_ERROR_ENOMEM = 0x8002000c;        // Insufficient memory
 constexpr int SCE_KERNEL_ERROR_EFAULT = 0x8002000e;        // Invalid address pointer
 constexpr int SCE_KERNEL_ERROR_EINVAL = 0x80020016;        // null or invalid states
@@ -11,5 +11,7 @@ constexpr int SCE_KERNEL_ERROR_ENAMETOOLONG = 0x8002003f;  // character strings
 // videoOut
 constexpr int SCE_VIDEO_OUT_ERROR_INVALID_VALUE = 0x80290001;        // invalid argument
 constexpr int SCE_VIDEO_OUT_ERROR_RESOURCE_BUSY = 0x80290009;        // already opened
+constexpr int SCE_VIDEO_OUT_ERROR_INVALID_INDEX = 0x8029000A;        // invalid buffer index
 constexpr int SCE_VIDEO_OUT_ERROR_INVALID_HANDLE = 0x8029000B;       // invalid handle
 constexpr int SCE_VIDEO_OUT_ERROR_INVALID_EVENT_QUEUE = 0x8029000C;  // Invalid event queue
+constexpr int SCE_VIDEO_OUT_ERROR_FLIP_QUEUE_FULL = 0x80290012;      // flip queue is full
diff --git a/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp b/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp
index ccf25e92..cdcdfeed 100644
--- a/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp
+++ b/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.cpp
@@ -1,4 +1,5 @@
 #include "video_out_ctx.h"
+#include <Core/PS4/HLE/LibKernel.h>
 
 namespace HLE::Graphics::Objects {
 
@@ -38,5 +39,28 @@ void FlipQueue::getFlipStatus(VideoConfigInternal* cfg, SceVideoOutFlipStatus* o
     *out = cfg->m_flip_status;
 }
 
+bool FlipQueue::submitFlip(VideoConfigInternal* cfg, s32 index, s64 flip_arg) { 
+    Lib::LockMutexGuard lock(m_mutex);
+
+    if (m_requests.size() >= 2) {
+        return false;
+    }
+
+    Request r{};
+    r.cfg = cfg;
+    r.index = index;
+    r.flip_arg = flip_arg;
+    r.submit_tsc = HLE::Libs::LibKernel::sceKernelReadTsc();
+
+    m_requests.push_back(r);
+
+    cfg->m_flip_status.flipPendingNum = static_cast<int>(m_requests.size());
+    cfg->m_flip_status.gcQueueNum = 0;
+
+    m_submit_cond.SignalCondVar();
+
+    return true;
+}
+
 };  // namespace HLE::Graphics::Objects
 
diff --git a/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h b/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h
index 477ce3eb..570898f2 100644
--- a/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h
+++ b/src/Core/PS4/HLE/Graphics/Objects/video_out_ctx.h
@@ -24,9 +24,19 @@ class FlipQueue {
     virtual ~FlipQueue() {}
 
     void getFlipStatus(VideoConfigInternal* cfg, SceVideoOutFlipStatus* out);
-
+    bool submitFlip(VideoConfigInternal* cfg, s32 index, s64 flip_arg);
   private:
+    struct Request {
+        VideoConfigInternal* cfg;
+        int index;
+        int64_t flip_arg;
+        uint64_t submit_tsc;
+    };
+
     Lib::Mutex m_mutex;
+    Lib::ConditionVariable m_submit_cond;
+    Lib::ConditionVariable m_done_cond;
+    std::vector<Request> m_requests;
 };
 
 class VideoOutCtx {
diff --git a/src/Core/PS4/HLE/Graphics/video_out.cpp b/src/Core/PS4/HLE/Graphics/video_out.cpp
index 26b5813a..1c4020a3 100644
--- a/src/Core/PS4/HLE/Graphics/video_out.cpp
+++ b/src/Core/PS4/HLE/Graphics/video_out.cpp
@@ -116,9 +116,30 @@ s32 PS4_SYSV_ABI sceVideoOutIsFlipPending(s32 handle) {
     return 0;
 }
 s32 PS4_SYSV_ABI sceVideoOutSubmitFlip(s32 handle, s32 bufferIndex, s32 flipMode, s64 flipArg) {
-    // BREAKPOINT();
-    PRINT_DUMMY_FUNCTION_NAME();
-    return 0;
+    PRINT_FUNCTION_NAME();
+    auto* videoOut = Singleton<HLE::Graphics::Objects::VideoOutCtx>::Instance();
+    auto* ctx = videoOut->getCtx(handle);
+
+    if (flipMode != 1) {
+        BREAKPOINT();  // only flipmode==1 is supported
+    }
+    if (bufferIndex == -1) {
+        BREAKPOINT();  // blank output not supported
+    }
+    if (bufferIndex < -1 || bufferIndex > 15) {
+        LOG_TRACE_IF(log_file_videoout, "sceVideoOutSubmitFlip invalid bufferIndex {}\n",bufferIndex);
+        return SCE_VIDEO_OUT_ERROR_INVALID_INDEX;
+    }
+    LOG_INFO_IF(log_file_videoout, "bufferIndex = {}\n", bufferIndex);
+    LOG_INFO_IF(log_file_videoout, "flipMode = {}\n", flipMode);
+    LOG_INFO_IF(log_file_videoout, "flipArg = {}\n", flipArg);
+
+    if (!videoOut->getFlipQueue().submitFlip(ctx, bufferIndex, flipArg)) {
+        LOG_TRACE_IF(log_file_videoout, "sceVideoOutSubmitFlip flip queue is full\n");
+        return SCE_VIDEO_OUT_ERROR_FLIP_QUEUE_FULL;
+    }
+
+    return SCE_OK;
 }
 s32 PS4_SYSV_ABI sceVideoOutGetFlipStatus(s32 handle, SceVideoOutFlipStatus* status) {
     PRINT_FUNCTION_NAME();
diff --git a/src/Core/PS4/HLE/LibKernel.cpp b/src/Core/PS4/HLE/LibKernel.cpp
index a35fcb4b..cc86aedb 100644
--- a/src/Core/PS4/HLE/LibKernel.cpp
+++ b/src/Core/PS4/HLE/LibKernel.cpp
@@ -21,6 +21,11 @@ namespace HLE::Libs::LibKernel {
 
     static PS4_SYSV_ABI void stack_chk_fail() { BREAKPOINT();
     }
+    u64 PS4_SYSV_ABI sceKernelReadTsc() {
+        LARGE_INTEGER c;
+        QueryPerformanceCounter(&c);
+        return c.QuadPart;
+    }
     void LibKernel_Register(SymbolsResolver* sym) { 
         //obj
         LIB_OBJ("f7uOxY9mM1U", "libkernel", 1, "libkernel", 1, 1, &HLE::Libs::LibKernel::g_stack_chk_guard);
@@ -35,6 +40,8 @@ namespace HLE::Libs::LibKernel {
         //misc
         LIB_FUNCTION("WslcK1FQcGI", "libkernel", 1, "libkernel", 1, 1, CPUManagement::sceKernelIsNeoMode);
         LIB_FUNCTION("Ou3iL1abvng", "libkernel", 1, "libkernel", 1, 1, stack_chk_fail);
+        //time
+        LIB_FUNCTION("-2IRUCO--PM", "libkernel", 1, "libkernel", 1, 1, sceKernelReadTsc);
     }
 
 }; 
\ No newline at end of file
diff --git a/src/Core/PS4/HLE/LibKernel.h b/src/Core/PS4/HLE/LibKernel.h
index 4f4f851a..903aef84 100644
--- a/src/Core/PS4/HLE/LibKernel.h
+++ b/src/Core/PS4/HLE/LibKernel.h
@@ -6,6 +6,6 @@ void LibKernel_Register(SymbolsResolver* sym);
 
 // functions
 
-
+u64 PS4_SYSV_ABI sceKernelReadTsc();
 int32_t PS4_SYSV_ABI sceKernelReleaseDirectMemory(off_t start, size_t len);
 };  // namespace HLE::Libs::LibKernel
\ No newline at end of file