Re: Kernel and u-boot version selection in meta-rockchip

[Trevor Woerner <twoerner@gmail.com>]

Hi Taoran,

On Mon 2025-03-10 @ 11:10:31 AM, 刘陶然 wrote:
> Hi Trevor,
> I'm trying to build the scarthgap branch for meta-rockchip and got errors
> in kernel and u-boot.
> I noticed it is because of the receipts in the branch. Just like
> https://git.yoctoproject.org/meta-rockchip/tree/recipes-kernel/linux/linux-torvalds-next_git.bb?h=scarthgap
> 
> it's using next-20240904 from linux-torvalds-next
> <https://git.yoctoproject.org/meta-rockchip/tree/recipes-kernel/linux/linux-torvalds-next_git.bb?h=scarthgap>,
> but the branches in this repository are expired very frequently.
> 
> For the LTS version like scarthgap, when the version is frozen, it should
> be set to stable(better to be LTS) versions of kernel and u-boot, isn't it?

Yes it should, and it does... when it can.

Yocto scarthgap is based on linux-6.6.y. All of the machines in
meta-rockchip's scarthgap branch use oe-core's linux-yocto_6.6, except the
radxa zero 3 machines and the orangepi-5-plus. The reason for this is because
linux-6.6.y does not support these devices.

oe-core scarthgap also provides a linux-yocto-dev kernel based on linux-6.9.y.
This supports the orangepi-5-plus machine (so this machine uses that kernel in
scarthgap) but linux-6.9.y still does not have support for the radxa zero 3
devices.

Yocto master currently supports linux-6.12.y with linux-yocto and linux-6.14.y
with linux-yocto-dev. linux-6.12.y supports both the radxa zero 3 devices and
the orangepi-5-plus (which reminds me, I should update those machines since
they're still using linux-yocto-dev).

So I assume you're probably using scarthgap to build for a radxa zero 3
device since your comments are only true for that device. During the
time-frame of scarthgap I was eager to be able to build for the radxa zero 3
since I had one and wanted to use it for a project. So I had to pull in what
was (at that time) very experimental code to get it to work.

I could back-port oe-core master's linux-yocto to scarthgap in order to
support the radxa zero 3 in a more stable way. But perhaps a better solution
would be to remove radxa zero 3 support from scarthgap and simply ask that
master be used for this device.

Thoughts?

Best regards,
	Trevor