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{ lib, stdenv, fetchFromGitHub, fetchpatch, kernel, runtimeShell }:
let
baseName = "bbswitch";
version = "unstable-2021-11-29";
name = "${baseName}-${version}-${kernel.version}";
in
stdenv.mkDerivation {
inherit name;
src = fetchFromGitHub {
owner = "Bumblebee-Project";
repo = "bbswitch";
# https://github.com/Bumblebee-Project/bbswitch/tree/develop
rev = "23891174a80ea79c7720bcc7048a5c2bfcde5cd9";
hash = "sha256-50v1Jxem5kaI1dHOKmgBbPLxI82QeYxiaRHhrHpWRzU=";
};
patches = [
(fetchpatch {
url = "https://raw.githubusercontent.com/archlinux/svntogit-community/0bd986055ba52887b81048de5c61e618eec06eb0/trunk/0003-kernel-5.18.patch";
sha256 = "sha256-va62/bR1qyBBMPg0lUwCH7slGG0XijxVCsFa4FCoHEQ=";
})
];
nativeBuildInputs = kernel.moduleBuildDependencies;
hardeningDisable = [ "pic" ];
preBuild = ''
substituteInPlace Makefile \
--replace "/lib/modules" "${kernel.dev}/lib/modules"
'';
makeFlags = kernel.makeFlags;
installPhase = ''
mkdir -p $out/lib/modules/${kernel.modDirVersion}/misc
cp bbswitch.ko $out/lib/modules/${kernel.modDirVersion}/misc
mkdir -p $out/bin
tee $out/bin/discrete_vga_poweroff << EOF
#!${runtimeShell}
echo -n OFF > /proc/acpi/bbswitch
EOF
tee $out/bin/discrete_vga_poweron << EOF
#!${runtimeShell}
echo -n ON > /proc/acpi/bbswitch
EOF
chmod +x $out/bin/discrete_vga_poweroff $out/bin/discrete_vga_poweron
'';
meta = with lib; {
description = "A module for powering off hybrid GPUs";
platforms = [ "x86_64-linux" "i686-linux" ];
homepage = "https://github.com/Bumblebee-Project/bbswitch";
maintainers = with maintainers; [ abbradar ];
license = licenses.gpl2Plus;
};
}
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