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Re: Build Kernel 5.5 RC3 for Raspberry4



The kernel was build with

make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig
(to check if raspberry pi stuff is enablend)
make -j`nproc` ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bindeb-pkg

I get also firmware errors when I boot the original ubuntu image (log
attached).
so i think it doesn't matter.

Boot the debian kernel I miss something like:

[    4.541716] mmc0: new ultra high speed DDR50 SDHC card at address aaaa
[    4.555228] mmcblk0: mmc0:aaaa SC32G 29.7 GiB
[    4.569103]  mmcblk0: p1 p2

RASPBERRYPI_FIRMWARE is set in kernel config. I'm not sure what this
mean, what steps i have to do that the kernel use the firmware.
In the log attached you can find this:

[    0.096980] raspberrypi-firmware soc:firmware: Attached to firmware
from 2019-08-15 12:03, variant start
[    0.100911] raspberrypi-firmware soc:firmware: Firmware hash is
9f8431fb7839c7f00f52b81f5822ddab2b31d0db

which file is used there?

On 01.01.20 05:23, Nigel Sollars wrote:
> Just took a look at the bootlog there,  those GPIO failures arnt
> clever,  missing firmware I would take a wild guess that things in the
> latest kernel tree has changed I did also see an article about newer
> support for the Pi 4 in the latest kernel ( cant remember if its 5.4
> or 5.5 ).  Do you use 'make menuconfig'?.  the size difference you
> mention with those errors do point to you not enabling the needful
>
> Looks like 4.19 has been the latest for along time,  I would diff your
> 5.5 config with the 4.19 and see what you have missing / what has
> moved / changed.  A quick google does not yield much so you could be
> very much on your own / pioneering this one.
>
> Hopefully helpful links
>
> Someone to perhaps reach out to for info,
> https://forum.manjaro.org/t/raspberry-pi-4-5-4-1-kernel/114273
>
> 5.5 Graphics / better support by all accounts,
>
> https://www.phoronix.com/scan.php?page=article&item=linux-55-features&num=1
> https://www.linux-arm.info/index.php/1537-linux-5-5-lands-broadcom-bcm2711-raspberry-pi-4-bits
>
> again hope this helps
>
> Nige
>
> On Tue, Dec 31, 2019 at 5:18 AM basti <mailinglist@unix-solution.de> wrote:
>> Hello,
>>
>> I have try to build kernel for raspi4 from upstream (5.5-rc3). Kernel
>> boot but can't find the SD Card, so there is no partition, no root-fs
>> and end up in initramfs/busybox.
>>
>> Log of serial console is attached. I have used U-boot and dtb from
>> ubuntu image. My dtb build during kernel build is a half size of the
>> ubuntu one and doesn't work.
>>
>> the custom build kernel works on rpi3 out of the box.
>>
>> best regards
>>
>> p.s. i build it as deb package
>>
>>
>

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