common/gpu/intel: avoid always enabling OneVPL runtime on pre-TGL GPUs

common/gpu/intel/default.nix

@@ -22,7 +22,7 @@
       };
 
     computeRuntime = lib.mkOption {
-      description = "intel-compute-runtime variant to use";
+      description = "intel-compute-runtime variant to use (legacy for Gen8–11, default for Gen12+)";
       type = lib.types.enum [
         "default"
         "legacy"
@@ -30,6 +30,15 @@
       default = "default";
     };
 
+    mediaRuntime = lib.mkOption {
+      description = "Intel media runtime to use (Media SDK for Gen8–11, OneVPL for Gen12+)";
+      type = lib.types.enum [
+        "vpl-gpu-rt"
+        "intel-media-sdk"
+      ];
+      default = "vpl-gpu-rt";
+    };
+
     vaapiDriver = lib.mkOption {
       description = "Intel VAAPI driver to use (use null to use both)";
       type = lib.types.nullOr (
@@ -71,7 +80,11 @@
           pkgs.intel-compute-runtime-legacy1
         else
           pkgs.intel-compute-runtime;
-      vpl-gpu-rt = pkgs.vpl-gpu-rt or pkgs.onevpl-intel-gpu;
+      intel-media-runtime =
+        if cfg.mediaRuntime == "vpl-gpu-rt" then
+          pkgs.vpl-gpu-rt or pkgs.onevpl-intel-gpu
+        else
+          pkgs.intel-media-sdk;
     in
     {
       boot.initrd.kernelModules = lib.optionals cfg.loadInInitrd [ cfg.driver ];
@@ -82,7 +95,7 @@
         ++ lib.optionals useIntelMediaDriver [
           intel-media-driver
           intel-compute-runtime
-          vpl-gpu-rt
+          intel-media-runtime
         ];
 
       hardware.graphics.extraPackages32 =