Re: flash-kernel and dtbs

[Rainer Dorsch <ml@bokomoko.de>]

Hi Vagrant,

thanks for your quick reply.

On Sonntag, 26. November 2017 11:30:04 CET Vagrant Cascadian wrote:
> On 2017-11-26, Rainer Dorsch wrote:
> > I try to setup the correct dtb for a HummingBoard DualLite using
> > flash-kernel,
> > but the kernel seems to load always the Cubox-i dtb:
> What u-boot do you have installed? 

It seems there is no u-boot installed at all....

rd@mohot:~$ apt-cache policy u-boot-imx
u-boot-imx:
  Installed: (none)
  Candidate: 2016.11+dfsg1-4
  Version table:
     2016.11+dfsg1-4 500
        500 http://ftp.de.debian.org/debian stretch/main armhf Packages
rd@mohot:~$ apt-cache policy u-boot
u-boot:
  Installed: (none)
  Candidate: 2016.11+dfsg1-4
  Version table:
     2016.11+dfsg1-4 500
        500 http://ftp.de.debian.org/debian stretch/main armhf Packages
rd@mohot:~$ 

....I am wondering why the device boots at all.

> Can you get to the u-boot console
> (probably serial console), and run the following commands:
> 
>   ver
>   run findfdt
>   printenv fdtfile

Yes, that should work, but I need to do that later this week.

> > root@mohot:~# cat /etc/flash-kernel/machine
> > SolidRun HummingBoard DL/Solo
> > root@mohot:~# fdtdump /boot/dtb-4.13.0-0.bpo.1-armmp |grep model
> > 
> >     model = "SolidRun HummingBoard Solo/DualLite";
> >     
> >         model = "On-board Codec";
> >         model = "On-board SPDIF";
> > 
> > root@mohot:~# uname -a
> > Linux mohot 4.13.0-0.bpo.1-armmp #1 SMP Debian 4.13.4-2~bpo9+1
> > (2017-10-17)
> > armv7l GNU/Linux
> > root@mohot:~#  ls -l /boot/dtb-4.13.0-0.bpo.1-armmp
> > lrwxrwxrwx 1 root root 49 Nov 26 15:16 /boot/dtb-4.13.0-0.bpo.1-armmp ->
> > dtbs/ 4.13.0-0.bpo.1-armmp/imx6dl-hummingboard.dtb
> 
> What is the output of "ls /boot/dtbs/*/*.dtb" ?

root@mohot:/var/log# ls /boot/dtbs/*/*.dtb
/boot/dtbs/4.13.0-0.bpo.1-armmp/imx6dl-hummingboard.dtb  /boot/dtbs/
4.13.0-0.bpo.1-armmp/imx6q-hummingboard.dtb
/boot/dtbs/4.13.0-0.bpo.1-armmp/imx6q-cubox-i.dtb        /boot/dtbs/4.9.0-4-
armmp/imx6q-cubox-i.dtb
root@mohot:/var/log# 

> > Looks all good for me so far, but another dtb is loaded:
> > 
> > rd@mohot:~$ grep fdt /var/log/kern.log
> > Nov 19 16:45:14 mohot kernel: [    0.000000] OF: fdt: Machine model:
> > SolidRun Cubox-i Dual/Quad
> 
> What is the output of "cat /proc/device-tree/model" ?

root@mohot:/var/log# cat /proc/device-tree/model 
SolidRun Cubox-i Dual/Quadroot@mohot:/var/log# 

> > Can anybody tell, what I am doing wrong? Is that a flash-kernel bug?
> 
> I doubt it's flash-kernel; more likely you have the wrong u-boot build,
> or wrong environment variables saved in u-boot.
> 

The missing u-boot points also in this direction, I installed u-boot-imx now, 
but that did not change anything...

Rainer

-- 
Rainer Dorsch
http://bokomoko.de/