ati_unfree: Create a nixos module for the ati_unfree x11 driver and blacklist the radeon driver when ati_unfree is installed.

nixos/modules/hardware/opengl.nix

···
     environment.sessionVariables.LD_LIBRARY_PATH =
       [ "/run/opengl-driver/lib" "/run/opengl-driver-32/lib" ];
 
-    # FIXME: move this into card-specific modules.
-    hardware.opengl.package = mkDefault
-      (if elem "ati_unfree" videoDrivers then
-        kernelPackages.ati_drivers_x11
-      else
-        makePackage pkgs);
-
+    hardware.opengl.package = mkDefault (makePackage pkgs);
     hardware.opengl.package32 = mkDefault (makePackage pkgs_i686);
 
-    boot.extraModulePackages =
-      optional (elem "virtualbox" videoDrivers) kernelPackages.virtualboxGuestAdditions ++
-      optional (elem "ati_unfree" videoDrivers) kernelPackages.ati_drivers_x11;
-
-    environment.etc =
-      optionalAttrs (elem "ati_unfree" videoDrivers) {
-        "ati".source = "${kernelPackages.ati_drivers_x11}/etc/ati";
-      };
+    boot.extraModulePackages = optional (elem "virtualbox" videoDrivers) kernelPackages.virtualboxGuestAdditions;
   };
 }

nixos/modules/hardware/video/ati.nix

···
+# This module provides the proprietary ATI X11 / OpenGL drivers.
+
+{ config, lib, pkgs, pkgs_i686, ... }:
+
+with lib;
+
+let
+
+  drivers = config.services.xserver.videoDrivers;
+
+  enabled = elem "ati_unfree" drivers;
+
+  ati_x11 = config.boot.kernelPackages.ati_drivers_x11;
+
+in
+
+{
+
+  config = mkIf enabled {
+
+    services.xserver.drivers = singleton
+      { name = "fglrx"; modules = [ ati_x11 ]; libPath = [ "${ati_x11}/lib" ]; };
+
+    hardware.opengl.package = ati_x11;
+    #hardware.opengl.package32 = pkgs_i686.linuxPackages.ati_x11.override { libsOnly = true; kernel = null; };
+
+    environment.systemPackages = [ ati_x11 ];
+
+    boot.extraModulePackages = [ ati_x11 ];
+
+    boot.blacklistedKernelModules = [ "radeon" ];
+
+    environment.etc."ati".source = "${ati_x11}/etc/ati";
+
+  };
+
+}

nixos/modules/module-list.nix

···
   ./hardware/pcmcia.nix
   ./hardware/video/bumblebee.nix
   ./hardware/video/nvidia.nix
+  ./hardware/video/ati.nix
   ./installer/tools/nixos-checkout.nix
   ./installer/tools/tools.nix
   ./misc/assertions.nix

nixos/modules/services/x11/xserver.nix

···
 
   # Map video driver names to driver packages. FIXME: move into card-specific modules.
   knownVideoDrivers = {
-    ati_unfree   = { modules = [ kernelPackages.ati_drivers_x11 ]; driverName = "fglrx"; };
     nouveau       = { modules = [ pkgs.xf86_video_nouveau ]; };
     unichrome    = { modules = [ pkgs.xorgVideoUnichrome ]; };
     virtualbox   = { modules = [ kernelPackages.virtualboxGuestAdditions ]; driverName = "vboxvideo"; };
···
         pkgs.xterm
         pkgs.xdg_utils
       ]
-      ++ optional (elem "virtualbox" cfg.videoDrivers) xorg.xrefresh
-      ++ optional (elem "ati_unfree" cfg.videoDrivers) kernelPackages.ati_drivers_x11;
+      ++ optional (elem "virtualbox" cfg.videoDrivers) xorg.xrefresh;
 
     environment.pathsToLink =
       [ "/etc/xdg" "/share/xdg" "/share/applications" "/share/icons" "/share/pixmaps" ];
···
             XORG_DRI_DRIVER_PATH = "/run/opengl-driver/lib/dri"; # !!! Depends on the driver selected at runtime.
             LD_LIBRARY_PATH = concatStringsSep ":" (
               [ "${xorg.libX11}/lib" "${xorg.libXext}/lib" ]
-              ++ optionals (elem "ati_unfree" cfg.videoDrivers)
-                [ "${kernelPackages.ati_drivers_x11}/lib" "${kernelPackages.ati_drivers_x11}/X11R6/lib64/modules/linux" ]
               ++ concatLists (catAttrs "libPath" cfg.drivers));
           } // cfg.displayManager.job.environment;
 

pkgs/os-specific/linux/ati-drivers/default.nix

···
 # There is one issue left:
 # /usr/lib/dri/fglrx_dri.so must point to /run/opengl-driver/lib/fglrx_dri.so
 
-# You eventually have to blacklist radeon module (?)
-
 assert stdenv.system == "x86_64-linux";
 
 stdenv.mkDerivation {