config/hardware/gpu/rocm.nix

{ pkgs, ... }:
{
  # assumes common-gpu-amd from nixos-hardware is also added
  # TODO: should we move it from flake.nix to here?

  # nixos-hardware common-amd option
  hardware.amdgpu.opencl = true;


  nixpkgs.config.openglSupport = true; # why is this not set by hardware.opengl.enable ?
  nixpkgs.config.rocmSupport = true;
  nixpkgs.config.openglSupport = true;
  nixpkgs.config.vdpauSupport  = true;
  nixpkgs.config.vaapiSupport  = true;


  hardware.opengl.enable = true;
  # https://libreddit.noximilien.pbsds.net/r/archlinux/comments/nih9c9/amdgpu_vs_modesetting_in_current_510_kernels_xorg/
  services.xserver.videoDrivers = [ "amdgpu" ]; # use gpu, adaptive sync and and hardware page flipping
  #services.xserver.videoDrivers = [ "modesetting" ]; # integrated (non-accelerated) framebuffer, KMS

  systemd.tmpfiles.rules = [
    "L+    /opt/rocm/hip   -    -    -     -    ${pkgs.hip}"
  ];
  environment.systemPackages = with pkgs; [
    nvtop-amd
  ];
}