diff --git a/dlls/win32u/gdiobj.c b/dlls/win32u/gdiobj.c
index a661cefe0bd..d097ba158fd 100644
--- a/dlls/win32u/gdiobj.c
+++ b/dlls/win32u/gdiobj.c
@@ -1079,17 +1079,10 @@ static struct unix_funcs unix_funcs =
     NtGdiCreateDIBitmapInternal,
     NtGdiCreateMetafileDC,
     NtGdiDdDDICheckVidPnExclusiveOwnership,
-    NtGdiDdDDICloseAdapter,
     NtGdiDdDDICreateDCFromMemory,
-    NtGdiDdDDICreateDevice,
     NtGdiDdDDIDestroyDCFromMemory,
     NtGdiDdDDIDestroyDevice,
     NtGdiDdDDIEscape,
-    NtGdiDdDDIOpenAdapterFromDeviceName,
-    NtGdiDdDDIOpenAdapterFromHdc,
-    NtGdiDdDDIOpenAdapterFromLuid,
-    NtGdiDdDDIQueryStatistics,
-    NtGdiDdDDISetQueuedLimit,
     NtGdiDdDDISetVidPnSourceOwner,
     NtGdiDeleteObjectApp,
     NtGdiDoPalette,
diff --git a/dlls/win32u/syscall.c b/dlls/win32u/syscall.c
index 28b7b177ba8..77fe84d074a 100644
--- a/dlls/win32u/syscall.c
+++ b/dlls/win32u/syscall.c
@@ -51,6 +51,13 @@ static void * const syscalls[] =
     NtGdiCreateRectRgn,
     NtGdiCreateRoundRectRgn,
     NtGdiCreateSolidBrush,
+    NtGdiDdDDICloseAdapter,
+    NtGdiDdDDICreateDevice,
+    NtGdiDdDDIOpenAdapterFromDeviceName,
+    NtGdiDdDDIOpenAdapterFromHdc,
+    NtGdiDdDDIOpenAdapterFromLuid,
+    NtGdiDdDDIQueryStatistics,
+    NtGdiDdDDISetQueuedLimit,
     NtGdiDeleteClientObj,
     NtGdiDescribePixelFormat,
     NtGdiDrawStream,
diff --git a/dlls/win32u/win32u.spec b/dlls/win32u/win32u.spec
index 1c5a960e59c..c7cf34ea1ff 100644
--- a/dlls/win32u/win32u.spec
+++ b/dlls/win32u/win32u.spec
@@ -187,14 +187,14 @@
 @ stub NtGdiDdDDICheckOcclusion
 @ stub NtGdiDdDDICheckSharedResourceAccess
 @ stdcall NtGdiDdDDICheckVidPnExclusiveOwnership(ptr)
-@ stdcall NtGdiDdDDICloseAdapter(ptr)
+@ stdcall -syscall NtGdiDdDDICloseAdapter(ptr)
 @ stub NtGdiDdDDIConfigureSharedResource
 @ stub NtGdiDdDDICreateAllocation
 @ stub NtGdiDdDDICreateBundleObject
 @ stub NtGdiDdDDICreateContext
 @ stub NtGdiDdDDICreateContextVirtual
 @ stdcall NtGdiDdDDICreateDCFromMemory(ptr)
-@ stdcall NtGdiDdDDICreateDevice(ptr)
+@ stdcall -syscall NtGdiDdDDICreateDevice(ptr)
 @ stub NtGdiDdDDICreateHwContext
 @ stub NtGdiDdDDICreateHwQueue
 @ stub NtGdiDdDDICreateKeyedMutex
@@ -268,9 +268,9 @@
 @ stub NtGdiDdDDINetDispStartMiracastDisplayDevice
 @ stub NtGdiDdDDINetDispStopMiracastDisplayDevice
 @ stub NtGdiDdDDIOfferAllocations
-@ stdcall NtGdiDdDDIOpenAdapterFromDeviceName(ptr)
-@ stdcall NtGdiDdDDIOpenAdapterFromHdc(ptr)
-@ stdcall NtGdiDdDDIOpenAdapterFromLuid(ptr)
+@ stdcall -syscall NtGdiDdDDIOpenAdapterFromDeviceName(ptr)
+@ stdcall -syscall NtGdiDdDDIOpenAdapterFromHdc(ptr)
+@ stdcall -syscall NtGdiDdDDIOpenAdapterFromLuid(ptr)
 @ stub NtGdiDdDDIOpenBundleObjectNtHandleFromName
 @ stub NtGdiDdDDIOpenKeyedMutex
 @ stub NtGdiDdDDIOpenKeyedMutex2
@@ -305,7 +305,7 @@
 @ stub NtGdiDdDDIQueryRemoteVidPnSourceFromGdiDisplayName
 @ stub NtGdiDdDDIQueryResourceInfo
 @ stub NtGdiDdDDIQueryResourceInfoFromNtHandle
-@ stdcall NtGdiDdDDIQueryStatistics(ptr)
+@ stdcall -syscall NtGdiDdDDIQueryStatistics(ptr)
 @ stub NtGdiDdDDIQueryVidPnExclusiveOwnership
 @ stub NtGdiDdDDIQueryVideoMemoryInfo
 @ stub NtGdiDdDDIReclaimAllocations
@@ -330,7 +330,7 @@
 @ stub NtGdiDdDDISetProcessDeviceRemovalSupport
 @ stub NtGdiDdDDISetProcessSchedulingPriorityBand
 @ stub NtGdiDdDDISetProcessSchedulingPriorityClass
-@ stdcall NtGdiDdDDISetQueuedLimit(ptr)
+@ stdcall -syscall NtGdiDdDDISetQueuedLimit(ptr)
 @ stub NtGdiDdDDISetStablePowerState
 @ stub NtGdiDdDDISetStereoEnabled
 @ stub NtGdiDdDDISetSyncRefreshCountWaitTarget
diff --git a/dlls/win32u/win32u_private.h b/dlls/win32u/win32u_private.h
index d187354cfcc..9a0a16c1f22 100644
--- a/dlls/win32u/win32u_private.h
+++ b/dlls/win32u/win32u_private.h
@@ -64,17 +64,10 @@ struct unix_funcs
                                                      ULONG flags, HANDLE xform );
     HDC      (WINAPI *pNtGdiCreateMetafileDC)( HDC hdc );
     NTSTATUS (WINAPI *pNtGdiDdDDICheckVidPnExclusiveOwnership)( const D3DKMT_CHECKVIDPNEXCLUSIVEOWNERSHIP *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDICloseAdapter)( const D3DKMT_CLOSEADAPTER *desc );
     NTSTATUS (WINAPI *pNtGdiDdDDICreateDCFromMemory)( D3DKMT_CREATEDCFROMMEMORY *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDICreateDevice)( D3DKMT_CREATEDEVICE *desc );
     NTSTATUS (WINAPI *pNtGdiDdDDIDestroyDCFromMemory)( const D3DKMT_DESTROYDCFROMMEMORY *desc );
     NTSTATUS (WINAPI *pNtGdiDdDDIDestroyDevice)( const D3DKMT_DESTROYDEVICE *desc );
     NTSTATUS (WINAPI *pNtGdiDdDDIEscape)( const D3DKMT_ESCAPE *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDIOpenAdapterFromDeviceName)( D3DKMT_OPENADAPTERFROMDEVICENAME *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDIOpenAdapterFromHdc)( D3DKMT_OPENADAPTERFROMHDC *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDIOpenAdapterFromLuid)( D3DKMT_OPENADAPTERFROMLUID *desc );
-    NTSTATUS (WINAPI *pNtGdiDdDDIQueryStatistics)( D3DKMT_QUERYSTATISTICS *stats );
-    NTSTATUS (WINAPI *pNtGdiDdDDISetQueuedLimit)( D3DKMT_SETQUEUEDLIMIT *desc );
     NTSTATUS (WINAPI *pNtGdiDdDDISetVidPnSourceOwner)( const D3DKMT_SETVIDPNSOURCEOWNER *desc );
     BOOL     (WINAPI *pNtGdiDeleteObjectApp)( HGDIOBJ obj );
     LONG     (WINAPI *pNtGdiDoPalette)( HGDIOBJ handle, WORD start, WORD count, void *entries,
diff --git a/dlls/win32u/wrappers.c b/dlls/win32u/wrappers.c
index 55abc39abd3..0f1a97f171b 100644
--- a/dlls/win32u/wrappers.c
+++ b/dlls/win32u/wrappers.c
@@ -574,21 +574,11 @@ NTSTATUS WINAPI NtGdiDdDDICheckVidPnExclusiveOwnership( const D3DKMT_CHECKVIDPNE
     return unix_funcs->pNtGdiDdDDICheckVidPnExclusiveOwnership( desc );
 }
 
-NTSTATUS WINAPI NtGdiDdDDICloseAdapter( const D3DKMT_CLOSEADAPTER *desc )
-{
-    return unix_funcs->pNtGdiDdDDICloseAdapter( desc );
-}
-
 NTSTATUS WINAPI NtGdiDdDDICreateDCFromMemory( D3DKMT_CREATEDCFROMMEMORY *desc )
 {
     return unix_funcs->pNtGdiDdDDICreateDCFromMemory( desc );
 }
 
-NTSTATUS WINAPI NtGdiDdDDICreateDevice( D3DKMT_CREATEDEVICE *desc )
-{
-    return unix_funcs->pNtGdiDdDDICreateDevice( desc );
-}
-
 NTSTATUS WINAPI NtGdiDdDDIDestroyDCFromMemory( const D3DKMT_DESTROYDCFROMMEMORY *desc )
 {
     return unix_funcs->pNtGdiDdDDIDestroyDCFromMemory( desc );
@@ -604,31 +594,6 @@ NTSTATUS WINAPI NtGdiDdDDIEscape( const D3DKMT_ESCAPE *desc )
     return unix_funcs->pNtGdiDdDDIEscape( desc );
 }
 
-NTSTATUS WINAPI NtGdiDdDDIOpenAdapterFromDeviceName( D3DKMT_OPENADAPTERFROMDEVICENAME *desc )
-{
-    return unix_funcs->pNtGdiDdDDIOpenAdapterFromDeviceName( desc );
-}
-
-NTSTATUS WINAPI NtGdiDdDDIOpenAdapterFromHdc( D3DKMT_OPENADAPTERFROMHDC *desc )
-{
-    return unix_funcs->pNtGdiDdDDIOpenAdapterFromHdc( desc );
-}
-
-NTSTATUS WINAPI NtGdiDdDDIOpenAdapterFromLuid( D3DKMT_OPENADAPTERFROMLUID *desc )
-{
-    return unix_funcs->pNtGdiDdDDIOpenAdapterFromLuid( desc );
-}
-
-NTSTATUS WINAPI NtGdiDdDDIQueryStatistics( D3DKMT_QUERYSTATISTICS *stats )
-{
-    return unix_funcs->pNtGdiDdDDIQueryStatistics( stats );
-}
-
-NTSTATUS WINAPI NtGdiDdDDISetQueuedLimit( D3DKMT_SETQUEUEDLIMIT *desc )
-{
-    return unix_funcs->pNtGdiDdDDISetQueuedLimit( desc );
-}
-
 NTSTATUS WINAPI NtGdiDdDDISetVidPnSourceOwner( const D3DKMT_SETVIDPNSOURCEOWNER *desc )
 {
     return unix_funcs->pNtGdiDdDDISetVidPnSourceOwner( desc );
diff --git a/dlls/wow64win/gdi.c b/dlls/wow64win/gdi.c
index c3746cb0088..348c3259f2e 100644
--- a/dlls/wow64win/gdi.c
+++ b/dlls/wow64win/gdi.c
@@ -583,3 +583,108 @@ NTSTATUS WINAPI wow64_NtGdiFlush( UINT *args )
 {
     return NtGdiFlush();
 }
+
+NTSTATUS WINAPI wow64_NtGdiDdDDICloseAdapter( UINT *args )
+{
+    const D3DKMT_CLOSEADAPTER *desc = get_ptr( &args );
+
+    return NtGdiDdDDICloseAdapter( desc );
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDICreateDevice( UINT *args )
+{
+    struct
+    {
+        D3DKMT_HANDLE hAdapter;
+        D3DKMT_CREATEDEVICEFLAGS Flags;
+        D3DKMT_HANDLE hDevice;
+        ULONG pCommandBuffer;
+        UINT CommandBufferSize;
+        ULONG pAllocationList;
+        UINT AllocationListSize;
+        ULONG pPatchLocationList;
+        UINT PatchLocationListSize;
+    } *desc32 = get_ptr( &args );
+
+    D3DKMT_CREATEDEVICE desc =
+    {
+        { desc32->hAdapter },
+        desc32->Flags
+    };
+    NTSTATUS status;
+
+    if (!(status = NtGdiDdDDICreateDevice( &desc )))
+    {
+        desc32->hDevice = desc.hDevice;
+        desc32->pCommandBuffer = PtrToUlong( desc.pCommandBuffer );
+        desc32->CommandBufferSize = desc.CommandBufferSize;
+        desc32->pAllocationList = PtrToUlong( desc.pAllocationList );
+        desc32->AllocationListSize = desc.AllocationListSize;
+        desc32->pPatchLocationList = PtrToUlong( desc.pPatchLocationList );
+        desc32->PatchLocationListSize = desc.PatchLocationListSize;
+    }
+    return status;
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDIOpenAdapterFromDeviceName( UINT *args )
+{
+    struct
+    {
+        ULONG pDeviceName;
+        D3DKMT_HANDLE hAdapter;
+        LUID AdapterLuid;
+    } *desc32 = get_ptr( &args );
+
+    D3DKMT_OPENADAPTERFROMDEVICENAME desc = { UlongToPtr( desc32->pDeviceName ) };
+    NTSTATUS status;
+
+    if (!(status = NtGdiDdDDIOpenAdapterFromDeviceName( &desc )))
+    {
+        desc32->hAdapter = desc.hAdapter;
+        desc32->AdapterLuid = desc.AdapterLuid;
+    }
+    return status;
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDIOpenAdapterFromHdc( UINT *args )
+{
+    struct
+    {
+        ULONG hDc;
+        D3DKMT_HANDLE hAdapter;
+        LUID AdapterLuid;
+        D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId;
+    } *desc32 = get_ptr( &args );
+
+    D3DKMT_OPENADAPTERFROMHDC desc = { UlongToHandle( desc32->hDc ) };
+    NTSTATUS status;
+
+    if (!(status = NtGdiDdDDIOpenAdapterFromHdc( &desc )))
+    {
+        desc32->hAdapter = desc.hAdapter;
+        desc32->AdapterLuid = desc.AdapterLuid;
+        desc32->VidPnSourceId = desc.VidPnSourceId;
+    }
+    return status;
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDIOpenAdapterFromLuid( UINT *args )
+{
+    D3DKMT_OPENADAPTERFROMLUID *desc = get_ptr( &args );
+
+    return NtGdiDdDDIOpenAdapterFromLuid( desc );
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDIQueryStatistics( UINT *args )
+{
+    D3DKMT_QUERYSTATISTICS *stats = get_ptr( &args );
+
+    return NtGdiDdDDIQueryStatistics( stats );
+}
+
+NTSTATUS WINAPI wow64_NtGdiDdDDISetQueuedLimit( UINT *args )
+{
+    D3DKMT_SETQUEUEDLIMIT *desc = get_ptr( &args );
+
+    return NtGdiDdDDISetQueuedLimit( desc );
+}
diff --git a/dlls/wow64win/syscall.h b/dlls/wow64win/syscall.h
index 1d74d55e032..18435b993f0 100644
--- a/dlls/wow64win/syscall.h
+++ b/dlls/wow64win/syscall.h
@@ -38,6 +38,13 @@
     SYSCALL_ENTRY( NtGdiCreateRectRgn ) \
     SYSCALL_ENTRY( NtGdiCreateRoundRectRgn ) \
     SYSCALL_ENTRY( NtGdiCreateSolidBrush ) \
+    SYSCALL_ENTRY( NtGdiDdDDICloseAdapter ) \
+    SYSCALL_ENTRY( NtGdiDdDDICreateDevice ) \
+    SYSCALL_ENTRY( NtGdiDdDDIOpenAdapterFromDeviceName ) \
+    SYSCALL_ENTRY( NtGdiDdDDIOpenAdapterFromHdc ) \
+    SYSCALL_ENTRY( NtGdiDdDDIOpenAdapterFromLuid ) \
+    SYSCALL_ENTRY( NtGdiDdDDIQueryStatistics ) \
+    SYSCALL_ENTRY( NtGdiDdDDISetQueuedLimit ) \
     SYSCALL_ENTRY( NtGdiDeleteClientObj ) \
     SYSCALL_ENTRY( NtGdiDescribePixelFormat ) \
     SYSCALL_ENTRY( NtGdiDrawStream ) \