mirror of
https://github.com/samueldr/wip-pinebook-pro.git
synced 2024-06-30 16:38:33 +02:00
44 lines
1.5 KiB
Markdown
44 lines
1.5 KiB
Markdown
WIP stuff to get started on the pinebook pro.
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## `u-boot`
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Assuming `/dev/mmcblk0` is an SD card.
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```
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$ nix-build -A pkgs.uBootPinebookPro
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$ lsblk /dev/mmcblk0 && sudo dd if=result/idbloader.img of=/dev/mmcblk0 bs=512 seek=64 oflag=direct,sync && sudo dd if=result/u-boot.itb of=/dev/mmcblk0 bs=512 seek=16384 oflag=direct,sync
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```
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The eMMC has to be zeroed (in the relevant sectors) or else the RK3399 will use
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the eMMC as a boot device first.
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Alternatively, this u-boot can be installed to the eMMC.
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Installing to SPI has yet to be investigated.
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## Image build
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```
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$ ./build.sh
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$ lsblk /dev/mmcblk0 && sudo dd if=$(echo result/sd-image/*.img) of=/dev/mmcblk0 bs=8M oflag=direct status=progress
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```
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The `build.sh` script transmits parameters to `nix-build`, so e.g. `-j0` can
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be used.
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Once built, this image is self-sufficient, meaning that it should already be
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booting, no need burn u-boot to it.
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Though, the current setup will dump the output to the serial console by
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default. This means that without serial output (or editing `nixos/sd-image-aarch64.nix`)
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only a flashing caret will be shown on the display during boot, and this may
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stay there for a while during the filesystem expansion process.
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## Note about cross-compilation
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This will automatically detect the need for cross-compiling or not.
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When cross-compiled, all caveats apply. Here this mainly means that the kernel
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will need to be re-compiled on the device on the first nixos-rebuild switch,
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while most other packages can be fetched from the cache.
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