vi: implement CloseDisplay

src/core/hle/service/nvflinger/nvflinger.cpp

@@ -138,6 +138,19 @@ std::optional<u64> NVFlinger::OpenDisplay(std::string_view name) {
     return itr->GetID();
 }
 
+bool NVFlinger::CloseDisplay(u64 display_id) {
+    const auto lock_guard = Lock();
+    auto* const display = FindDisplay(display_id);
+
+    if (display == nullptr) {
+        return false;
+    }
+
+    display->Reset();
+
+    return true;
+}
+
 std::optional<u64> NVFlinger::CreateLayer(u64 display_id) {
     const auto lock_guard = Lock();
     auto* const display = FindDisplay(display_id);

src/core/hle/service/nvflinger/nvflinger.h

@@ -58,6 +58,11 @@ public:
     /// If an invalid display name is provided, then an empty optional is returned.
     [[nodiscard]] std::optional<u64> OpenDisplay(std::string_view name);
 
+    /// Closes the specified display by its ID.
+    ///
+    /// Returns false if an invalid display ID is provided.
+    [[nodiscard]] bool CloseDisplay(u64 display_id);
+
     /// Creates a layer on the specified display and returns the layer ID.
     ///
     /// If an invalid display ID is specified, then an empty optional is returned.

src/core/hle/service/vi/display/vi_display.h

@@ -106,6 +106,12 @@ public:
     ///
     void CloseLayer(u64 layer_id);
 
+    /// Resets the display for a new connection.
+    void Reset() {
+        layers.clear();
+        got_vsync_event = false;
+    }
+
     /// Attempts to find a layer with the given ID.
     ///
     /// @param layer_id The layer ID.

src/core/hle/service/vi/vi.cpp

@@ -324,10 +324,10 @@ private:
         IPC::RequestParser rp{ctx};
         const u64 display = rp.Pop<u64>();
 
-        LOG_WARNING(Service_VI, "(STUBBED) called. display=0x{:016X}", display);
+        const Result rc = nv_flinger.CloseDisplay(display) ? ResultSuccess : ResultUnknown;
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
+        rb.Push(rc);
     }
 
     void CreateManagedLayer(Kernel::HLERequestContext& ctx) {
@@ -508,10 +508,10 @@ private:
         IPC::RequestParser rp{ctx};
         const u64 display_id = rp.Pop<u64>();
 
-        LOG_WARNING(Service_VI, "(STUBBED) called. display_id=0x{:016X}", display_id);
+        const Result rc = nv_flinger.CloseDisplay(display_id) ? ResultSuccess : ResultUnknown;
 
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(ResultSuccess);
+        rb.Push(rc);
     }
 
     // This literally does nothing internally in the actual service itself,