Copy the RPCS3 setup improvements to the steam deck config.

nix/steam_deck/configuration/roles/rpcs3/default.nix

@@ -10,6 +10,9 @@ let
     export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pkgs.libglvnd}/lib"
     exec ${pkgs.rpcs3}/bin/rpcs3 "''${@}"
   '';
+  rpcs3_config_yaml = settingsFormat.generate "config.yml" config.me.rpcs3.config;
+  settingsFormat = pkgs.formats.yaml { };
+
 in
 {
   imports = [ ];
@@ -21,6 +24,33 @@ in
       example = true;
       description = "Whether we want to install rpcs3.";
     };
+
+    rpcs3.config = lib.mkOption rec {
+      apply = lib.recursiveUpdate default;
+      inherit (settingsFormat) type;
+      default = {
+        Core = {
+          "Use LLVM CPU" = "znver2";
+        };
+        VFS = {
+          "Enable /host_root/" = false;
+        };
+        Video = {
+          "Write Color Buffers" = true;
+          VSync = true;
+          "Performance Overlay" = {
+            Enabled = false;
+          };
+        };
+        Miscellaneous = {
+          "Pause emulation on RPCS3 focus loss" = true;
+          "Start games in fullscreen mode" = true;
+          "Pause Emulation During Home Menu" = false; # true makes the home menu slow
+        };
+      };
+      example = null;
+      description = "RPCS3's config.yml in nix form.";
+    };
   };
 
   config = lib.mkIf config.me.rpcs3.enable (
@@ -31,15 +61,23 @@ in
           steam_rpcs3
         ];
 
-        # .config/rpcs3/config.yml
-        # .config/rpcs3/GuiConfigs/CurrentSettings.ini
+        home.file.".config/rpcs3/config.yml" = lib.mkIf (config.me.rpcs3.config != null) {
+          source = rpcs3_config_yaml;
+        };
+        home.file.".config/rpcs3/GuiConfigs/CurrentSettings.ini" = {
+          source = ./files/CurrentSettings.ini;
+        };
 
+        # TODO: Persist file .config/rpcs3/GuiConfigs/persistent_settings.dat # play times and recently played
         me.persist.directories = [
+          ".config/rpcs3/games" # Location of ROMs.
           ".config/rpcs3/dev_hdd0"
           ".config/rpcs3/dev_hdd1"
           ".config/rpcs3/savestates"
           ".config/rpcs3/dev_usb000"
           ".config/rpcs3/dev_flash" # Seems to be where the firmware is installed.
+          ".config/rpcs3/input_configs" # Controller config.
+          ".config/rpcs3/Icons" # Game icons.
         ];
         me.state.directories = [ ".cache/rpcs3" ];
 

nix/steam_deck/configuration/roles/rpcs3/files/CurrentSettings.ini

@@ -0,0 +1,5 @@
+[Meta]
+currentStylesheet=Darker Style by TheMitoSan
+
+[main_window]
+infoBoxEnabledWelcome=false