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From: Chris Johnson <simplus314159@gmail.com>
Date: Tue, 10 Sep 2019 04:16:25 -0500
Message-ID: <CA+A6k6ds6p+L_=Yd=k1eCRuMQOmvfhoY3rjR4UtZzq=XRP1x9w@mail.gmail.com>
Subject: Re: Raspberry Pi 4 Kernel and Boot
To: ~alpine/devel@lists.alpinelinux.org
Content-Type: text/plain; charset="UTF-8"

Just filed an issue (#10789).

Thanks!

On 9/10/19, Natanael Copa <ncopa@alpinelinux.org> wrote:
> Hi!
>
> Thanks for this.
>
> Can you please file an issue on
> https://gitlab.alpinelinux.org/alpine/aports/issues with all those
> details? It will help us not forget.
>
> Thanks!
>
> -nc
>
> On Mon, 9 Sep 2019 23:54:40 -0500
> Chris Johnson <simplus314159@gmail.com> wrote:
>
>>  I have tried running arm64 rpi alpine 3.10.2 on the Raspberry pi 4
>> and have found a couple of things that need to be adjusted.
>>
>> The 3.10.2 release does not boot becuase it is missing a couple of new
>> files required by the Raspberry pi 4. These two files are:
>>
>> start4.elf
>> fixup4.dat
>>
>> They can be retrieved from the official raspberry pi repository:
>>
>> https://github.com/raspberrypi/firmware/tree/master/boot
>>
>> They go in the top level of the fat32(boot) partition of the 3.10.2
>> release. I do not see an aport that can be patched to include these and
>> I can not figure out how the releases are generated to create a
>> patch.
>>
>> The config.txt needs a couple of modifications, arm_control is being
>> depreciated, so
>>
>> arm_control=0x200 needs to be changed to arm_64bit=1
>>
>> and the following needs to be added
>>
>> enable_gic=1
>>
>> I have tested the above changes, and they allow the raspberry pi 4
>> to boot with current release 3.10.2. However, no usb devices work. This
>> is because the kernel is not built with the correct defconfig for the
>> raspberry pi 4. The new defconfig is:
>>
>> bcm2711_defconfig
>>
>> I looked at the aport for main/linux-rpi and find it too confusing.
>> I created an abuild chroot on a 64-bit arm and tried to build it using
>> bcm2711_defconfig but cannot get past patching. The raspberry pi
>> specific changes from alpine linux seem to fail when I try to build.
>>
>> Could these changes be included in the next release to allow the
>> raspberry pi 4 to work?
>>
>> Thank you so much for an amazing distro
>>
>> Sources of information for changes:
>>
>> Raspberry pi 4 on Ubuntu
>> https://jamesachambers.com/raspberry-pi-ubuntu-server-18-04-2-installation-guide/
>>
>> Raspberry pi 4 on Manjaro relase
>> https://www.manjaro.org/download/arm8-raspberry-pi-4-minimal/
>> I mounted the fat32 (boot) of the image to see what was going on
>> I am currently using this and it works flawlessly
>>
>> Official Raspberry pi documentation
>> https://www.raspberrypi.org/documentation/configuration/
>> specifically
>> https://www.raspberrypi.org/documentation/configuration/boot_folder.md
>
>