QT6 eglfs is not working on raspberry pi 4

[PhysicsX]

Hello

I cross compiled the qt6.3 for raspberry pi. But I can not run the eglfs platform. It gives these erros:

Configuration output is like that

QPA backends:
  DirectFB ............................... no
  EGLFS .................................. yes
  EGLFS details:
    EGLFS OpenWFD ........................ no
    EGLFS i.Mx6 .......................... no
    EGLFS i.Mx6 Wayland .................. no
    EGLFS RCAR ........................... no
    eglfs_egldevice ...................... yes
    eglfs_gbm ............................ yes
    EGLFS VSP2 ........................... no
    EGLFS Mali ........................... no
    EGLFS Raspberry Pi ................... no
    EGLFS X11 ............................ yes

EGLFS Raspberry Pi is "no". It should be on also? What should I do ? Is eglfs_egldevice not enough ?

System Model : Raspberry Pi 4 Model B Rev 1.1 Linux raspberrypi 5.15.32-v7l+ #1538 SMP Thu Mar 31 19:39:41 BST 2022 armv7l GNU/Linux

Raspberry Pi reference 2022-04-04 Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 226b479f8d32919c9fe36dd5b4c20c02682f8180, stage4

Thank you very much.

[carlonluca]

I think EGLFS Raspberry Pi is based on dispmanx, you need the old libbrcm libs for that. Also, I think I remember it is still not ported to cmake, I had to build it manually. KMS eglfs is probably what you want.

[PhysicsX]

Thanks for the answer.

KMS eglfs may be okay for me.

What should I do to enable kms eglfs ? Should I compile again the Qt?

Thank you.

[carlonluca]

You already did, eglfs GBM is enabled. For the rest not sure sorry, I saw those errors in quite a few cases.

[popcornmix]

This question would be better directed at eglfs/QT6 developers.

gbm generally means running fullscreen as the drm master. This means it won't work from an X desktop session. You can either boot to console and run it, or switch away from X VT (e.g. ctrl-alt-F2).

But I don't use eglfs (just using knowledge of gbm apps like kodi), hence the suggestion to ask eglfs/QT6 devs.