powerstation: init at 0.4.2

[ShadowApex]

Description of changes

Adds a derivation to run PowerStation on NixOS.

PowerStation is an open source TDP (Thermal Design Power) control and performance daemon with DBus interface. It can allow a user to control the TDP of integrated GPUs (typically for handheld gaming PCs like the ROG Ally and Legion Go) and enable/disable CPU cores to greatly extend battery life at the cost of some gaming performance.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

Add a 👍 reaction to pull requests you find important.

[FliegendeWurst]

Is there a UI for this already or is the user expected to set dbus stuff manually/scripted?

[ShadowApex]

Yes, OpenGamepadUI (which I am also working on packaging for NixOS) provides a UI for both PowerStation and InputPlumber. Both tools are UI agnostic though, so can be used via cli, scripting, or another user interface.

[ShadowApex]

I have opened a PR for the OpenGamepadUI derivation here: #368017

[misuzu]

The module addition should be in a separate commit.
The commit messages should be like this:

1. powerstation: init at 0.4.1
2. nixos/powerstation: init

See https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#commit-conventions

[FliegendeWurst]

aarch64-linux failed when building ryzenadj.
Ideally we would avoid the vendored ryzenadj copy:

diff --git a/pkgs/by-name/po/powerstation/package.nix b/pkgs/by-name/po/powerstation/package.nix
index f24da86884f1..b0a308c90120 100644
--- a/pkgs/by-name/po/powerstation/package.nix
+++ b/pkgs/by-name/po/powerstation/package.nix
@@ -5,6 +5,7 @@
   pkg-config,
   udev,
   pciutils,
+  ryzenadj,
   cmake,
 }:
 
@@ -31,8 +32,12 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     udev
     pciutils
+    ryzenadj
   ];
 
+  # use our ryzenadj library
+  env.DOCS_RS = "1";
+
   postInstall = ''
     cp -r rootfs/usr/* $out/
   '';

But unfortunately the vendored copy is at 0.15, whilst our package is at 0.16, so it doesn't work.

[ShadowApex]

aarch64-linux failed when building ryzenadj. Ideally we would avoid the vendored ryzenadj copy:

diff --git a/pkgs/by-name/po/powerstation/package.nix b/pkgs/by-name/po/powerstation/package.nix
index f24da86884f1..b0a308c90120 100644
--- a/pkgs/by-name/po/powerstation/package.nix
+++ b/pkgs/by-name/po/powerstation/package.nix
@@ -5,6 +5,7 @@
   pkg-config,
   udev,
   pciutils,
+  ryzenadj,
   cmake,
 }:
 
@@ -31,8 +32,12 @@ rustPlatform.buildRustPackage rec {
   buildInputs = [
     udev
     pciutils
+    ryzenadj
   ];
 
+  # use our ryzenadj library
+  env.DOCS_RS = "1";
+
   postInstall = ''
     cp -r rootfs/usr/* $out/
   '';

But unfortunately the vendored copy is at 0.15, whilst our package is at 0.16, so it doesn't work.

I haven't done testing on ARM, so it might not be suitable for that platform, yet. Ryzenadj itself is really only useful on AMD iGPU hardware which is exclusively x86_64, so I may update PowerStation so this dependency is conditional based on the CPU architecture.

[ShadowApex]

PowerStation v0.4.2 should correctly build for ARM now