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| − | {{ARM/breadcrumb}}
| + | This page has been moved to the official NixOS Wiki: |
| − | <div class="infobox">
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| − | {|class="table"
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| − | !colspan="2" class="title"|Hardkernel ODROID-HC4
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| − | |-
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| − | !Manufacturer
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| − | |Hardkernel
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| − | |-
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| − | !Architecture
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| − | |AArch64
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| − | |-
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| − | !Bootloader
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| − | |U-Boot
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| − | |-
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| − | !Boot options
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| − | |microSD (SATA?)
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| − | |}
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| − | </div>
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| | | | |
| − | == Status ==
| + | ⇒ '''[https://wiki.nixos.org/wiki/NixOS_on_ARM/ODROID-HC4 NixOS on ARM/ODROID-HC4]''' |
| | | | |
| − | Mostly working, but some manual steps needed to get it running.
| + | ''— samueldr, Lead of NixOS on ARM.'' |
| − | | |
| − | U-boot support in NixPkgs is currently in review: [https://github.com/NixOS/nixpkgs/pull/101454 NixPkgs Pull Request #101454]
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| − | | |
| − | == Board-specific installation notes ==
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| − | | |
| − | === Petitboot removal ===
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| − | | |
| − | Petitboot is installed on the SPI memory of the Odroid HC4 from factory. To be able to load an upstreamed version of U-Boot without having to press a hardware button at each boot, you may remove it.
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| − | '''Please proceed with caution, this will make Hardkernel images unbootable!''' | |
| − | | |
| − | From the Petitboot, go for “Exit to shell” and enter these commands to remove Petitboot:
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| − | <syntaxhighlight lang="bash">
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| − | flash_eraseall /dev/mtd0
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| − | flash_eraseall /dev/mtd1
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| − | flash_eraseall /dev/mtd2
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| − | flash_eraseall /dev/mtd3
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| − | </syntaxhighlight>
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| − | | |
| − | This will make your SPI flash memory empty and the device will now start from SD on next boot.
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| − | | |
| − | See [https://forum.odroid.com/viewtopic.php?f=207&t=40906 this Odroid forum topic] to restore Petitboot.
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| − | | |
| − | === NixOS installation ===
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| − | | |
| − | # First follow the [[NixOS_on_ARM#Installation|generic installation steps]] to get the latest stable installer image.
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| − | # Uncompress the .zst file. One may use the <code>unzstd</code> command (equivalent to <code>zstd -d</code>) on supported machines. The zstd commands can be accessed from the <code>zstd</code> package.
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| − | # Patch this image (.img file) with U-Boot for Odroid HC4. <syntaxhighlight lang="bash">
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| − | # Clone content of samueldr's wip/odroidc4 branch, edit the defconfig file, and build
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| − | git clone https://github.com/samueldr/nixpkgs --depth 1 -b wip/odroidc4 && cd nixpkgs
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| − | test "$(uname)" '==' 'Darwin' && sed -i '' 's/defconfig = "odroid-c4_defconfig"/defconfig = "odroid-hc4_defconfig"/' pkgs/misc/uboot/default.nix || sed -i 's/defconfig = "odroid-c4_defconfig"/defconfig = "odroid-hc4_defconfig"/' pkgs/misc/uboot/default.nix
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| − | nix-build -I "nixpkgs=$PWD" -A pkgsCross.aarch64-multiplatform.ubootOdroidC4
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| − | sudo dd if=result/u-boot.bin of=PATH/TO/nixos-sd-image-21.05.XXXX.XXXXXXXX-aarch64-linux.img conv=fsync,notrunc bs=512 seek=1
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| − | </syntaxhighlight>
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| − | # Flash the modified SD image file (.img) to a microSD card. '''This will erase all the data on the card!'''
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| − | | |
| − | == Known issues ==
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| − | === Fan doesn't work by default ===
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| − | You need to use software fan control (via <code>fancontrol</code>) for this. Add the following to your <code>configuration.nix</code>:
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| − | <syntaxhighlight>
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| − | # Based on the config from https://www.armbian.com/odroid-hc4/. Made MINTEMP and MAXTEMP a bit more relaxed so the fan doesn't run on idle.
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| − | hardware.fancontrol = {
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| − | enable = true;
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| − | config = ''
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| − | INTERVAL=10
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| − | DEVPATH=hwmon0=devices/virtual/thermal/thermal_zone0 hwmon2=devices/platform/pwm-fan
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| − | DEVNAME=hwmon0=cpu_thermal hwmon2=pwmfan
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| − | FCTEMPS=hwmon2/pwm1=hwmon0/temp1_input
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| − | MINTEMP=hwmon2/pwm1=55
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| − | MAXTEMP=hwmon2/pwm1=65
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| − | MINSTART=hwmon2/pwm1=20
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| − | MINSTOP=hwmon2/pwm1=28
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| − | MINPWM=hwmon2/pwm1=0
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| − | MAXPWM=hwmon2/pwm1=255
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| − | '';
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| − | };
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| − | </syntaxhighlight>
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| − | | |
| − | == No HDMI audio by default ==
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| − | | |
| − | After enabling ALSA you should see a sound card named "ODROID-HC4". Audio is not correctly routed by default so you might need to open alsa-mixer and change:
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| − | * <code>FRDDR_A SINK 1 SEL</code> to <code>OUT 1</code>
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| − | * <code>FRDDR_A SRC 1 EN</code> to on
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| − | * <code>TDMOUT_B SRC SEL</code> to <code>IN 0</code>
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| − | * <code>TOHDMITX</code> to on
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| − | * <code>TOHDMITX I2S SRC</code> to <code>I2S B</code>
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| − | | |
| − | After these changes, <code>speaker-test -c 2</code> should output white noise.
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| − | | |
| − | == Resources ==
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| − | | |
| − | * [https://www.hardkernel.com/shop/odroid-hc4/ Official product page]
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| − | * [https://github.com/considerate/nixos-odroidhc4/ NixOS configuration for the ODROID HC4 microcomputer by considerate]
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| − | * [https://www.armbian.com/odroid-hc4/ Armbian Odroid HC4]
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| − | * [https://u-boot.readthedocs.io/en/latest/board/amlogic/odroid-c4.html U-Boot for Odroid C4 documentation]
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