From 31e03a7fb8720c5edfcb8a364901fefc7681af45 Mon Sep 17 00:00:00 2001
From: Hadi <112569860+anotherhadi@users.noreply.github.com>
Date: Fri, 18 Apr 2025 10:18:05 +0200
Subject: [PATCH] Init hp-omen-linux-module to controle the keyboard backlight
 on omen laptop

Former-commit-id: d69b8c39e37144528411b7c19a6a729a671a8204
---
 hosts/laptop/configuration.nix |  1 +
 nixos/omen.nix                 | 72 ++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 nixos/omen.nix

diff --git a/hosts/laptop/configuration.nix b/hosts/laptop/configuration.nix
index b2bba90..89170dc 100644
--- a/hosts/laptop/configuration.nix
+++ b/hosts/laptop/configuration.nix
@@ -14,6 +14,7 @@
     ../../nixos/utils.nix
     # ../../nixos/docker.nix
     ../../nixos/tailscale.nix
+    ../../nixos/omen.nix # For my laptop only
 
     # You should let those lines as is
     ./hardware-configuration.nix
diff --git a/nixos/omen.nix b/nixos/omen.nix
new file mode 100644
index 0000000..68ed813
--- /dev/null
+++ b/nixos/omen.nix
@@ -0,0 +1,72 @@
+{ config, pkgs, ... }:
+
+let
+  hp-omen-linux-module = pkgs.callPackage
+    ({ kernel ? config.boot.kernelPackages.kernel, stdenv, fetchFromGitHub }:
+      stdenv.mkDerivation (finalAttrs: {
+        pname = "hp-omen-linux-module";
+        version = "rebase-6.14";
+        src = fetchFromGitHub {
+          owner = "ranisalt";
+          repo = "hp-omen-linux-module";
+          rev = finalAttrs.version;
+          sha256 = "sha256-2zCm29bdboSjRm/caMjBPGNc0tZXPUnIIYlHxxfhAok=";
+        };
+        setSourceRoot = ''
+          export sourceRoot=$(pwd)/${finalAttrs.src.name}/src
+        '';
+        nativeBuildInputs = kernel.moduleBuildDependencies;
+        makeFlags = [
+          "KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+        ];
+        installPhase = ''
+          runHook preInstall
+          install hp-wmi.ko -Dm444 -t $out/lib/modules/${kernel.modDirVersion}/kernel/drivers/platform/x86/hp/
+          runHook postInstall
+        '';
+      })) { kernel = config.boot.kernelPackages.kernel; };
+in {
+  boot.extraModulePackages = [ hp-omen-linux-module ];
+  boot.kernelModules = [ "hp-wmi" ];
+
+  users.groups.omen-rgb = { };
+  users.users.${config.var.username}.extraGroups = [ "omen-rgb" ];
+
+  systemd.tmpfiles.rules = [
+    "w /sys/devices/platform/hp-wmi/rgb_zones/zone00 0660 root omen-rgb -"
+    "w /sys/devices/platform/hp-wmi/rgb_zones/zone01 0660 root omen-rgb -"
+    "w /sys/devices/platform/hp-wmi/rgb_zones/zone02 0660 root omen-rgb -"
+    "w /sys/devices/platform/hp-wmi/rgb_zones/zone03 0660 root omen-rgb -"
+
+  ];
+
+  services.udev.extraRules = ''
+    SUBSYSTEM=="platform", KERNEL=="hp-wmi", ACTION=="add", \
+    RUN+="${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone00", \
+    RUN+="${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone00", \
+    RUN+="${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone01", \
+    RUN+="${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone01", \
+    RUN+="${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone02", \
+    RUN+="${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone02", \
+    RUN+="${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone03", \
+    RUN+="${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone03"
+  '';
+  # systemd.services.fix-hp-omen-perms = {
+  #   description = "Fix HP Omen keyboard RGB zone permissions";
+  #   after = [ "systemd-modules-load.service" ];
+  #   wantedBy = [ "multi-user.target" ];
+  #   serviceConfig = {
+  #     Type = "oneshot";
+  #     ExecStart = ''
+  #       ${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone00
+  #       ${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone00
+  #       ${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone01
+  #       ${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone01
+  #       ${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone02
+  #       ${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone02
+  #       ${pkgs.coreutils}/bin/chgrp omen-rgb /sys/devices/platform/hp-wmi/rgb_zones/zone03
+  #       ${pkgs.coreutils}/bin/chmod 0660 /sys/devices/platform/hp-wmi/rgb_zones/zone03
+  #     '';
+  #   };
+  # };
+}