5.4 kernel compilation fails for hardknott due to overlays/vc4-kms-dsi-7inch.dtbo

[razr]

5.4 kernel compilation fails for hardknott due to overlays/vc4-kms-dsi-7inch.dtbo

I have tried to compile a 5.4 kernel instead of 5.10 for the raspberrypi4-64

Steps to reproduce the issue:

1. add PREFERRED_VERSION_linux-raspberrypi = "5.4.%" to conf/local.conf
2. bitbake linux-raspberrypi

Describe the results you received: it fails due to this line overlays/vc4-kms-dsi-7inch.dtbo, since it presents only in 5.10 kernel: https://github.com/agherzan/meta-raspberrypi/blob/hardknott/conf/machine/include/rpi-base.inc#L50

If I remove this line I can successfully compile and boot 5.4

[agherzan]

Oh the fun. @razr do you happen to know if later 5.4 has it? If not, I'm inclined to drop the 5.4 version. Would that hurt your usecase?

[razr]

Hi @agherzan sorry, I don't know whether this dts exists in the latest 5.4. Actually, this issue does not hurt me at all, since I can work around it. I have built 5.4 PREEMPT_RT since I know it works, didn't try 5.10 yet.

[agherzan]

@razr Right. I have checked the latest 5.4 revision and this dts is not there either. I fail to see the reason to keep this version anymore. And if we do, it will add the overhead of making the dt overlay files version-specific - which I'd like to avoid. So I'll proceed to drop this version and see if anyone complains.

[agherzan]

Dropped in https://github.com/agherzan/meta-raspberrypi/pull/931

[razr]

do add 5.15 instead would be nice :)

[agherzan]

If I get a free moment I will @razr

[shr-project]

FWIW 5.10 is used by default since gatesgarth: https://github.com/agherzan/meta-raspberrypi/commit/12ff6a2ea60183877b3659b3d46ae4af986800e4

Any plans to create separate honister branch? I need to remove 5.4 bbappends in meta-webosose and would be useful to know if this removal will be part of meta-raspberrypi/honister or only master (for kirkstone).