Yocto STM32MP157 DK2 - Display not working

[kbch]

Hello

I use https://github.com/STMicroelectronics/meta-st-stm32mp with the stm32mp15-disco machine.

It boots fine, I can access the shell via USB-UART. But the display just shows an STM Logo from the Bootloader. What do I need to change, so the display works in Linux?

This is the error when trying to start X:

root@stm32mp15-disco:~# startx
xauth:  file /home/root/.serverauth.724 does not exist


X.Org X Server 1.21.1.8
X Protocol Version 11, Revision 0
Current Operating System: Linux stm32mp15-disco 6.1.28 #1 SMP PREEMPT Thu May 11 14:04:52 UTC 2023 armv7l
Kernel command line: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw   console=ttySTM0,115200
 
Current version of pixman: 0.42.2
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Fri Mar  9 21:17:20 2018
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE) 
Fatal server error:
(EE) no screens found(EE) 
(EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error

[Olivier GALLIEN]

Hi @kbch n

Can you please share version you are using and all details about yocto build config ? 

Thanks 

Olivier 

[kbch]

Hi @Olivier GALLIEN 

I'm using this branch of the meta repo, commit 5e5b99ba054276d10b4afec2b80962de3455b0a1

➜  meta-st-stm32mp git:(mickledore) ✗ git status
On branch mickledore
Your branch is up to date with 'origin/mickledore'.

bblayers and machine config:

➜  conf cat bblayers.conf                       
# POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf
# changes incompatibly
POKY_BBLAYERS_CONF_VERSION = "2"

BBPATH = "${TOPDIR}"
BBFILES ?= ""

BBLAYERS ?= " \
  /home/bmarty/mp1/poky/meta \
  /home/bmarty/mp1/poky/meta-poky \
  /home/bmarty/mp1/poky/meta-yocto-bsp \
  ${TOPDIR}/../meta-st-stm32mp \
  ${TOPDIR}/../meta-openembedded/meta-oe \
  ${TOPDIR}/../meta-openembedded/meta-networking \
  ${TOPDIR}/../meta-openembedded/meta-multimedia \
  ${TOPDIR}/../meta-openembedded/meta-python \
  "
➜  conf cat local.conf | grep MACHINE | grep stm
MACHINE = "stm32mp15-disco"

Do you need something else?

[Olivier GALLIEN]

Hi @kbch ,

Which image ? 

I understand that Startx may depends on X11 .. which is not supported in our distribution. 

I guess you might have to check all startx dependences and manage to add them to your distribution. 

Hope it help, 

Olivier 

[kbch]

Hi @Olivier GALLIEN 

I'm using a customized image based on core-image:

IMAGE_FEATURES += " \
        dev-pkgs \
        hwcodecs \
        package-management \
        x11-base \
"

IMAGE_INSTALL += "\
        packagegroup-base \
        packagegroup-core-base-utils \
        packagegroup-core-boot \
        packagegroup-core-full-cmdline \
        packagegroup-core-tools-debug \
        packagegroup-core-x11 \
        ${CORE_IMAGE_EXTRA_INSTALL} \
"

inherit core-image features_check

Can I somehow check within the Shell if the display got initialized to rule out any X11 specific issue?