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actually kms

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Tao Tien 2025-05-22 18:40:52 -07:00
parent 2202a9e279
commit 3babe46338
1 changed files with 75 additions and 1 deletions
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76
systems/NObangers.nix
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@ -19,7 +19,7 @@
services.pulseaudio.enable = true;
config.hardware.raspberry-pi."4" = {
bluetooth.enable = true;
fkms-3d.enable = true;
# fkms-3d.enable = true;
};
users.users.tao = {
@ -32,6 +32,80 @@
boot.loader.systemd-boot.enable = false;
boot.loader.efi.canTouchEfiVariables = false;
# Configure for modesetting in the device tree
hardware.deviceTree = {
overlays = [
# Equivalent to:
# https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/cma-overlay.dts
{
name = "rpi4-cma-overlay";
dtsText = ''
// SPDX-License-Identifier: GPL-2.0
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2711";
fragment@0 {
target = <&cma>;
__overlay__ {
size = <(512 * 1024 * 1024)>;
};
};
};
'';
}
# Equivalent to:
# https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
{
name = "rpi4-vc4-fkms-v3d-overlay";
dtsText = ''
// SPDX-License-Identifier: GPL-2.0
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2711";
fragment@1 {
target = <&fb>;
__overlay__ {
status = "disabled";
};
};
fragment@2 {
target = <&firmwarekms>;
__overlay__ {
status = "okay";
};
};
fragment@3 {
target = <&v3d>;
__overlay__ {
status = "okay";
};
};
fragment@4 {
target = <&vc4>;
__overlay__ {
status = "okay";
};
};
};
'';
}
];
};
# Also configure the system for modesetting.
services.xserver.videoDrivers = lib.mkBefore [
"modesetting" # Prefer the modesetting driver in X11
"fbdev" # Fallback to fbdev
];
fileSystems = {
"/" = {
device = "/dev/disk/by-label/NIXOS_SD";