[U-Boot] Issues with mx6 (cubox/wandboard) with 2017.09

[Peter Robinson]

>>> I'm seeing some issues with some of the i.MX6 devices with the latest
>>> stable release. It loads the SPL and then just seems to loop:
>>>
>>> U-Boot SPL 2017.09 (Sep 25 2017 - 18:42:10)
>>> Trying to boot from MMC1
>>>
>>> U-Boot SPL 2017.09 (Sep 25 2017 - 18:42:10)
>>> Trying to boot from MMC1
>>>
>>> U-Boot SPL 2017.09 (Sep 25 2017 - 18:42:10)
>>> Trying to boot from MMC1
>>>
>>> This is built on Fedora with latest gcc7 so I'm not sure if that's a
>>> possible issue. Is this something people are aware of and I've missed
>>> the fix.
>>
>> I haven't tested it with gcc7 yet, but if I use gcc6 I do not see the problem:
>>
>> U-Boot SPL 2017.09 (Sep 25 2017 - 15:55:59)
>> Trying to boot from MMC1
>>
>>
>> U-Boot 2017.09 (Sep 25 2017 - 15:55:59 -0300)
>>
>> CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
>> Reset cause: POR
>> Board: Wandboard rev B1
>> I2C:   ready
>> DRAM:  2 GiB
>> MMC:   FSL_SDHC: 0, FSL_SDHC: 1
>> No panel detected: default to HDMI
>> Display: HDMI (1024x768)
>> In:    serial
>> Out:   serial
>> Err:   serial
>> Net:   FEC [PRIME]
>> Hit any key to stop autoboot:  0
>> =>
>>
>> So maybe this issue could be related to gcc7?
>
> I've tested building U-Boot for Wandboard using GCC 7 from linaro.org:
> https://releases.linaro.org/components/toolchain/binaries/

I tested a build with 6.4 from Fedora 25 and I saw the same issue so
I'm not sure where the problem is coming from but I'm also
travelling/meetings so haven't had time to dig further into the issue