nix-files/hosts/by-name/moby/kernel.nix

147 lines
5.6 KiB
Nix

{ lib, pkgs, ... }:
let
# use the last commit on the 5.18 branch (5.18.14)
# manjaro's changes between kernel patch versions tend to be minimal if any.
manjaroBase = "https://gitlab.manjaro.org/manjaro-arm/packages/core/linux/-/raw/25bd828cd47b1c6e09fcbcf394a649b89d2876dd";
manjaroPatch = name: sha256: {
inherit name;
patch = pkgs.fetchpatch {
inherit name;
url = "${manjaroBase}/${name}?inline=false";
inherit sha256;
};
};
# the idea for patching off Manjaro's kernel comes from jakewaksbaum:
# - https://git.sr.ht/~jakewaksbaum/pi/tree/af20aae5653545d6e67a459b59ee3e1ca8a680b0/item/kernel/default.nix
# - he later abandoned this, i think because he's using the Pinephone Pro which received mainline support.
manjaroPatches = [
(manjaroPatch
"1001-arm64-dts-allwinner-add-hdmi-sound-to-pine-devices.patch"
"sha256-DApd791A+AxB28Ven/MVAyuyVphdo8KQDx8O7oxVPnc="
)
# these patches below are critical to enable wifi (RTL8723CS)
# - the alternative is a wholly forked kernel by megi/megous:
# - https://xnux.eu/howtos/build-pinephone-kernel.html#toc-how-to-build-megi-s-pinehpone-kernel
# - i don't know if these patches are based on megi's or original
(manjaroPatch
"2001-Bluetooth-Add-new-quirk-for-broken-local-ext-features.patch"
"sha256-CExhJuUWivegxPdnzKINEsKrMFx/m/1kOZFmlZ2SEOc="
)
(manjaroPatch
"2002-Bluetooth-btrtl-add-support-for-the-RTL8723CS.patch"
"sha256-dDdvOphTcP/Aog93HyH+L9m55laTgtjndPSE4/rnzUA="
)
(manjaroPatch
"2004-arm64-dts-allwinner-enable-bluetooth-pinetab-pinepho.patch"
"sha256-o43P3WzXyHK1PF+Kdter4asuyGAEKO6wf5ixcco2kCQ="
)
# XXX: this one has a Makefile, which hardcodes /sbin/depmod:
# - drivers/staging/rtl8723cs/Makefile
# - not sure if this is problematic?
(manjaroPatch
"2005-staging-add-rtl8723cs-driver.patch"
"sha256-6ywm3dQQ5JYl60CLKarxlSUukwi4QzqctCj3tVgzFbo="
)
];
# pinephone uses the linux dtb at arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
# - this includes sun50i-a64.dtsi
# - and sun50i-a64-cpu-opp.dtsi
# - no need to touch the allwinner-h6 stuff: that's the SBC pine product
# - i think it's safe to ignore sun9i stuff, but i don't know what it is
kernelConfig = with lib.kernel; {
# NB: nix adds the CONFIG_ prefix to each of these.
# if you add the prefix yourself nix will IGNORE YOUR CONFIG.
RTL8723CS = module;
BT_HCIUART_3WIRE = yes;
BT_HCIUART_RTL = yes;
RTL8XXXU_UNTESTED = yes;
BT_BNEP_MC_FILTER = yes;
BT_BNEP_PROTO_FILTER = yes;
BT_HS = yes;
BT_LE = yes;
# relevant configs inherited from nixos defaults (or above additions):
# CONFIG_BT=m
# CONFIG_BT_BREDR=y
# CONFIG_BT_RFCOMM=m
# CONFIG_BT_RFCOMM_TTY=y
# CONFIG_BT_BNEP=m
# CONFIG_BT_HIDP=m
# CONFIG_BT_RTL=m
# CONFIG_BT_HCIBTUSB=m
# CONFIG_BT_HCIBTUSB_BCM=y
# CONFIG_BT_HCIBTUSB_RTL=y
# CONFIG_BT_HCIUART=m
# CONFIG_BT_HCIUART_SERDEV=y
# CONFIG_BT_HCIUART_H4=y
# CONFIG_BT_HCIUART_LL=y
# CONFIG_RTL_CARDS=m
# CONFIG_RTLWIFI=m
# CONFIG_RTLWIFI_PCI=m
# CONFIG_RTLWIFI_USB=m
# CONFIG_RTLWIFI_DEBUG=y
# CONFIG_RTL8723_COMMON=m
# CONFIG_RTLBTCOEXIST=m
# CONFIG_RTL8XXXU=m
# CONFIG_RTLLIB=m
# consider adding (from mobile-nixos):
# maybe: CONFIG_BT_HCIUART_3WIRE=y
# maybe: CONFIG_BT_HCIUART_RTL=y
# maybe: CONFIG_RTL8XXXU_UNTESTED=y
# consider adding (from manjaro):
# CONFIG_BT_6LOWPAN=m (not listed as option in nixos kernel)
# these are referenced in the rtl8723 source, but not known to config (and not in mobile-nixos config
# maybe: CONFIG_RTL_ODM_WLAN_DRIVER
# maybe: CONFIG_RTL_TRIBAND_SUPPORT
# maybe: CONFIG_SDIO_HCI
# maybe: CONFIG_USB_HCI
};
# create a kernelPatch which overrides nixos' defconfig with extra options
patchDefconfig = config: {
# defconfig options. this method comes from here:
# - https://discourse.nixos.org/t/the-correct-way-to-override-the-latest-kernel-config/533/9
name = "sane-moby-defconfig";
patch = null;
extraStructuredConfig = config;
};
in
{
# use Megi's kernel:
# even with the Manjaro patches, stock 5.18 has a few issues on Pinephone:
# - no battery charging
# - phone rotation sensor is off by 90 degrees
# - ambient light sensor causes screen brightness to be shakey
# - phosh greeter may not appear after wake from sleep
boot.kernelPackages = pkgs.linuxPackagesFor pkgs.linux-megous;
boot.kernelPatches = [
(patchDefconfig (kernelConfig //
(with lib.kernel; {
# disabling the sun5i_eink driver avoids this compilation error:
# CC [M] drivers/video/fbdev/sun5i-eink-neon.o
# aarch64-unknown-linux-gnu-gcc: error: unrecognized command line option '-mfloat-abi=softfp'
# aarch64-unknown-linux-gnu-gcc: error: unrecognized command line option '-mfpu=neon'
# make[3]: *** [../scripts/Makefile.build:289: drivers/video/fbdev/sun5i-eink-neon.o] Error 1
FB_SUN5I_EINK = no;
# used by the pinephone pro, but fails to compile with:
# ../drivers/media/i2c/ov8858.c:1834:27: error: implicit declaration of function 'compat_ptr'
VIDEO_OV8858 = no;
})
))
];
# alternatively, use nixos' kernel and add the stuff we want:
# # cross-compilation optimization:
# boot.kernelPackages =
# let p = (import nixpkgs { localSystem = "x86_64-linux"; });
# in p.pkgsCross.aarch64-multiplatform.linuxPackages_5_18;
# # non-cross:
# # boot.kernelPackages = pkgs.linuxPackages_5_18;
# boot.kernelPatches = manjaroPatches ++ [
# (patchDefconfig kernelConfig)
# ];
}