Board description The Raspberry Pi 5 Model is a popular single board computer based on Broadcom SoCs. It is the most recent board within the Raspberry Pi family. [ID_230061_orig] URL: https://www.raspberrypi.com/products/raspberry-pi-5/ Wiki: https://elinux.org/RPi_Hub Test results Raspberry Pi…

Awesome work! The Pi3 and Pi4 posts all say that the bootfiles, firmware, etc are not copies. Is that issue solved with the Pi5 giving us true a/b booting? (except for uboot i guess?)

Hi @mterwoord , That’s one of the discrepancies between Debian-based and Yocto-based builds. Debian: kernel is on A/B partitions, device trees and overlays are not. This is required for the firmware loader magic to take effect, e.g. load/modify the device tree and modify the cmdline through config…

Hi @TheYostoJester, Thanks for the very fast answer. [image] TheYoctoJester: Debian: kernel is on A/B partitions, device trees and overlays are not. This is required for the firmware loader magic to take effect, e.g. load/modify the device tree and modify the cmdline through config.txt. Yocto…

[image] mterwoord: You mention Debian places device trees and overlays NOT on the A/B partitions due to that being a requirement for the firmware loader. How is that not a requirement for Yocto-based builds? Hi @mterwoord , The key difference is that when using Yocto, we control the whole bui…

Hi @TheYoctoJester , Thanks for clarifying. Just making sure here: A/B fully works with changing kernel versions etc? I guess I’ll have to think of what to do with my Pi3 stock now… :slight_smile: Regards, Matthijs

Hi @mterwoord , [image] mterwoord: Just making sure here: A/B fully works with changing kernel versions etc? On Yocto, yes. If not, then it is a bug. Nitpick: I remember at least one case where upgrading the firmware files was also required because of a hidden dependency. So those might sho…

Hi @TheYoctoJester , Can’t resist asking this: So on Pi3 and Pi4, the limitation of putting the kernel/dtb(o)'s on the primary partition still exists? Thanks! Regards, Matthijs

Hi @mterwoord , [image] mterwoord: Can’t resist asking this: So on Pi3 and Pi4, the limitation of putting the kernel/dtb(o)'s on the primary partition still exists? Only on Debianoids. Do you have any indication or post claiming that it applies to Yocto? Greetz, Josef

Hi @TheYoctoJester , For Pi 4, see Raspberry Pi 4 Model B - Yocto 5.0 "scarthgap" and later For Pi 3, see Raspberry Pi 3 Model B/B+ Or am I just completely misunderstanding those statements? Thanks for valueable insights! Regards, Matthijs

Besides that note, I currently use a script that copies the files to the boot partition before rebooting into the new partition, but that’s brittle: A wrong build then bricks the device.

Raspberry Pi 5

Board Integrations Yocto Project

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Raspberry Pi 5

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