[fedora-arm] Re: Odroid C2

On Sun, Jul 8, 2018 at 5:25 PM, Dr. Zenzic <dr.zenzic@gmail.com> wrote:
> Please excuse my ignorance as I'm really an HPC researcher working on
> building a small odroid-c2 cluster for parallel scaling research.
>
> You're correct that the kernel should be working out of the box and I
> don't believe that is my issue. It seems that u-boot isn't cooperating.
> I flashed the minimal image
> (https://download.fedoraproject.org/pub/fedora-secondary/releases/28/Spins/aarch64/images/Fedora-Minimal-28-1.1.aarch64.raw.xz)
> to the eMMC card and then tried to install u-boot according to these
> instructions https://wiki.odroid.com/odroid-c2/software/building_u-boot
> for the provided sd_fusing.sh. This should be adding the u-boot binaries
> to the beginning of the card; however, when I power the board on I
> simply get a solid blue kernel LED which seems to suggest that u-boot is
> starting but unable to boot the kernel.

Do you have a serial console TTL to see any output?

You likely want to follow the image creation section using the Fedora
built u-boot from the README in upstream U-Boot:

http://git.denx.de/?p=u-boot.git;a=blob_plain;f=board/amlogic/odroid-c2/README;hb=HEAD

> I was able to find an older fedora 25 image using a modified 3.14 kernel
> that boots so I'm attempting to go through the upgrade process for this
> currently.

I have no idea what process that uses but I doubt it's compatible,
userspace should work fine but I'm sorry this isn't really supportable
because we don't have the time and resources to support some random
image.

I've had reports that the C2 works OOTB with Fedora kernels.

> On 07/08/2018 08:05 AM, Peter Robinson wrote:
>> On Sat, Jul 7, 2018 at 10:49 PM, Dr. Zenzic <dr.zenzic@gmail.com> wrote:
>>> Hello All,
>>>
>>> Has anyone had any luck getting Fedora 28 to work on the Odroid C2?
>> I've had a number of reports it works just fine. I don't have a device
>> based on the same chipset to be able to confirm this though.
>>
>>> I've tried downloading the Fedora 28 Server aarch.raw.xz image which i
>>> put onto my sd card. I then moved the Archlinux aarch64 boot parition
>>> into boot along with the lib/modules and lib/firmware folders from
>>> Archlinux. This has been to no avail. I'm working on building the
>>> hardkernel kernel myself now but have never actually compiled a kernel
>>> myself so I'm not sure what I fully need to get the Fedora rootfs to
>>> boot with the kernel.
>> The Fedora kernel should work just fine so I have no idea why you
>> would even do anything you've attempted above.
>>
>>> If anyone has some guidance or a nice writeup on getting a bootable
>>> kernel recognized by Fedora on the Odroid C2 that would be greatly
>>> appreciated.
>> The only thing you should have to do is deal with the U-Boot side of
>> things, I believe that there's a need for a signed binary blob for the
>> early part of u-boot and you can use that in combination with the
>> Fedora build u-boot bit to boot the device but I've not got the exact
>> details. You shouldn't have to modify the kernel except possibly if
>> you want accelerated graphics but given you mention the Server image I
>> suspect that's not the case.
>>
>> Peter
>
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