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silitics / rugpi

An open-source platform empowering you to build innovative devices around customized Linux distributions.
https://rugpi.io
Apache License 2.0
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Support for customizing /boot/config.txt #17

Closed cmatheson closed 6 months ago

cmatheson commented 7 months ago

I noticed that the some changes are made to the config.txt file during build. It would be nice if it were possible to add other options at some point as well (maybe some kind of ability to add lines the layer.toml?

(For now I'm just making the changes out-of-band which also works fine).

koehlma commented 7 months ago

If you use the tryboot boot flow (Pi4/Pi5), you can use a recipe to copy your config.txt to /boot. Rugpi will simply remove any line starting with auto_initramfs, as this option is currently incompatible with Rugpi's own initialization procedure. Other than that, all customizations you make should be kept. Note that in the future the directory may change to /boot/firmware (which I consider to be a breaking change).

For u-boot, the config.txt can currently not be customized. I would have to give this some thought as the file cannot be updated and requires some specific options for U-Boot to work.

koehlma commented 6 months ago

I gave this some thought. The only clean way to apply customizations to config.txt is when the tryboot boot flow is used. Otherwise, it is unclear what will happen when installing an update. Customizing config.txt is already supported by recipes modifying it in /boot directly. So, I see no need to add complexity to the build pipeline, e.g., in terms of layer configuration.