[U-Boot] RPi3 Not autobooting from SD-card. {Scanned}

[Alexander Graf]

On 03/06/2018 01:55 PM, Jonathan Gray wrote:
> On Mon, Mar 05, 2018 at 06:18:59PM +0000, Peter Robinson wrote:
>>>>> Hi!
>>>>> I'm trying to boot from u-boot on a Raspberry Pi 3. But for some reason
>>>>> it
>>>>> isn't autobooting on the SD-card.
>>>>>
>>>>> Is it possible to get more debug output on the screen console? I don't
>>>>> have
>>>>> a serial console at the moment.
>>>>> The output on the screen is:
>>>>>
>>>>> Net:   No ehternet found.
>>>>> starting USB...
>>>>> USB:    Core Release 2.80a
>>>>> scanning bus 0 for devices... 4 USB Devices found
>>>>>          scanning usb for storage devices... 0 Storage Device(s) found
>>>>> Hit any key to stop autoboot:   0
>>>>> U-Boot>
>>>>>
>>>>> Shouldn't it mention mmc somewhere in the boot message?
>>>>>
>>>>> The first command I type on the prompt is always failing, it's not
>>>>> outputting anything. Just a new prompt on the next line. The next
>>>>> commands i
>>>>> type in are working. Which seems strange.
>>>>> I got boot.scr set up right, except graphic settings which are wrong. It
>>>>> is
>>>>> booting the kernel when I type 'run bootcmd'. But only after I type in
>>>>> another command before it.
>>>>> It seems like it's not detecting the SD-card (mmc0) until I have typed
>>>>> anything into the prompt.
>>>>>
>>>>> Do I have to set any other env variable for it to autoboot? I would have
>>>>> printed the output of printenv here, but since I don't have a serial
>>>>> console, retyping everything is very time consuming.
>>>>> printenv seems to have the right settings. It's basically a full console
>>>>> screen of variables. It just doesn't seem to load them until I type in
>>>>> another command before it.
>>>>>
>>>>> boot_targets=mmc0 usb0 pxe dhcp
>>>>> Which seems right to me.
>>>>>
>>>>> I compiled the latest u-boot from github.
>>>>>
>>>>> If you need more info please let me know and I'll post it.
>>>>>
>>>>> Hope that anyone can point me in the right direction here. Would really
>>>>> appreciate it.
>>>> I'm seeing the same issues with 2018.03 rc3.
>>>>
>>>> I'm not sure what the issue is and I've not had time to investigate it
>>>> further yet, but if you type "boot" and hit enter it should boot,
>>>> sometimes you actually have to type it twice. It will boot but I'm not
>>>> sure which bits here have causes this regression.
>>>
>>> I do not see this at all on my RPi3. Maybe it's firmware version dependent?
>>> Do you happen to have an image that always fails for you?
>> 2018.03 rc3 with "2018-02-09" firmware (so fairly recent) fails for me.
> 2018.03 rc4 works fine on rpi_3 here with

Do you have enable_uart=1 in your config.txt? If you do, it works. If 
you don't, it fails :)


Alex