vanadium: rework autorandr config

nix/configurations/vanadium/nixos/display.nix

@@ -1,4 +1,8 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  lib,
+  ...
+}: {
   imports = [
     #
     # builtin screen
@@ -15,6 +19,7 @@
       me.extraGroups = ["i2c"];
       hardware.i2c.enable = false;
       environment.systemPackages = [pkgs.ddcutil];
+      boot.kernelModules = ["i2c-dev"];
     }
   ];
 
@@ -22,100 +27,89 @@
   # Auto setup external screen
   #
   services.autorandr = {
-    enable = false;
+    enable = true;
     hooks.postswitch = {
       "20_xmonad" = "xmonad --restart"; # make sure feh keeps up
     };
 
     profiles = let
-      lg-monitor = "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";
       built-in = "00ffffffffffff0009e5ca0b000000002f200104a51c137803de50a3544c99260f505400000001010101010101010101010101010101115cd01881e02d50302036001dbe1000001aa749d01881e02d50302036001dbe1000001a000000fe00424f452043510a202020202020000000fe004e4531333546424d2d4e34310a0073";
+      asus-monitor = "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";
 
-      allOff = {
+      allExternDevices =
-        eDP-1.enable = false;
+        map (portNumber: "DP-${toString portNumber}") (lib.range 1 12);
-        DP-1.enable = false;
-        DP-2.enable = false;
-        DP-3.enable = false;
-        DP-4.enable = false;
-        DP-5.enable = false;
-        DP-6.enable = false;
-        DP-7.enable = false;
-        DP-8.enable = false;
-        DP-9.enable = false;
-        DP-10.enable = false;
-        DP-11.enable = false;
-        DP-12.enable = false;
-      };
 
-      home-switch = {
+      /**
-        "10_xrdb-dpi" = "xrdb -merge ${pkgs.writeText "xrdb-dpi-config" ''
+      Generate an attribute set by mapping a function over a list of attribute names.
-          Xcursor.size: 84
+      It allows setting the name of the attribute.
-          Xft.dpi:   150
+      */
-        ''}";
+      genAttrs' = xs: func: builtins.listToAttrs (map func xs);
 
-        "30_xkbcapswap" = ''
+      mkExtSwitch = {dpi}: {
-          setxkbmap -option
-        '';
-      };
-
-      laptop-switch = {
         "10_xrdb-dpi" = "xrdb -merge ${pkgs.writeText "xrdb-dpi-config" ''
           Xcursor.size: 64
-          Xft.dpi:   150
+          Xft.dpi:   ${toString dpi}
         ''}";
-
-        "30_xkbcapswap" = ''
-          setxkbmap -option caps:swapescape
-        '';
       };
 
-      mkHomeProfile = dev: {
+      # Note: the "position" field corresponds to the "pos" field outputted by autorandr
-        fingerprint = {
+      # To get the current config, run `xrandr --auto` and then `autorandr --config`
-          ${dev} = lg-monitor;
+      configs = {
-          eDP-1 = built-in;
+        allOff = genAttrs' allExternDevices (name: {
-        };
+          inherit name;
-        config =
+          value = {enable = false;};
-          allOff
+        });
-          // {
+        enableBuiltin = primary: {
-            ${dev} = {
+          eDP-1 =
-              enable = true;
+            {
-              crtc = 1;
-              mode = "3840x2160";
-              rate = "60.00";
-              primary = true;
-            };
-          };
-        hooks.postswitch = home-switch;
-      };
-    in {
-      home-DP-1 = mkHomeProfile "DP-1";
-      home-DP-2 = mkHomeProfile "DP-2";
-      home-DP-3 = mkHomeProfile "DP-3";
-      home-DP-4 = mkHomeProfile "DP-4";
-      home-DP-5 = mkHomeProfile "DP-5";
-      home-DP-6 = mkHomeProfile "DP-6";
-      home-DP-7 = mkHomeProfile "DP-7";
-      home-DP-8 = mkHomeProfile "DP-8";
-      home-DP-9 = mkHomeProfile "DP-9";
-      home-DP-10 = mkHomeProfile "DP-10";
-      home-DP-11 = mkHomeProfile "DP-11";
-      home-DP-12 = mkHomeProfile "DP-12";
-
-      laptop = {
-        fingerprint.eDP-1 = built-in;
-        config =
-          allOff
-          // {
-            eDP-1 = {
               enable = true;
               crtc = 0;
               mode = "2256x1504";
-              primary = true;
               rate = "60.00";
-            };
+            }
+            // lib.optionalAttrs primary {primary = true;};
+        };
+        enableDevice = name: {
+          ${name} = {
+            enable = true;
+            primary = true;
+            crtc = 1;
+            mode = "2560x1440";
+            position = "2256x0"; # on the right of built-in
+            rate = "59.95";
           };
-        hooks.postswitch = laptop-switch;
+        };
+      };
+
+      frameworkBuiltin = {
+        fingerprint.eDP-1 = built-in;
+        config = with configs;
+          allOff // enableBuiltin true;
+        hooks.postswitch = mkExtSwitch {dpi = 150;};
+      };
+
+      mkAsusProfile = name: withBuiltin: {
+        fingerprint = {
+          ${name} = asus-monitor;
+          eDP-1 = built-in;
+        };
+        config = with configs;
+          allOff
+          // enableDevice name
+          // lib.optionalAttrs withBuiltin (enableBuiltin false);
+        hooks.postswitch = mkExtSwitch {dpi = 120;};
+      };
+    in
+      genAttrs' allExternDevices (name: {
+        name = "asus-${name}-builtin";
+        value = mkAsusProfile name true;
+      })
+      // genAttrs' allExternDevices (name: {
+        name = "asus-${name}-no-builtin";
+        value = mkAsusProfile name false;
+      })
+      // {
+        laptop = frameworkBuiltin;
       };
-    };
   };
 }