QT5: Failed to load EGL device integration "eglfs_viv" on armStoneA9r2

Hi,

I'm testing an armStoneA9r2 board, and I tried to write a Qt5 demo application carefully following the tutorial you provided, but the application fails to launch, with the following message :

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'

qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_kms_egldevice", "eglfs_x11")

qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv", "eglfs_x11", "eglfs_emu", "eglfs_kms_egldevice")

qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"

qt.qpa.egldeviceintegration: Failed to load EGL device integration "eglfs_viv"

qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_x11"

qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_x11"

Could not open display

Aborted

The only way to start the application is launching through xinit:

xinit ./testApp

if I unset the DISPLAY environment variable, the log turns into:

qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_kms_egldevice", "eglfs_x11")

qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv", "eglfs_emu", "eglfs_kms_egldevice", "eglfs_x11")

qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"

qt.qpa.egldeviceintegration: Failed to load EGL device integration "eglfs_viv"

qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_emu"

qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_emu"

Could not open egl display

Aborted

The Qt config.summary log shows:

....

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 ............................ no

EGLFS VSP2 ........................... no

EGLFS Mali ........................... no

EGLFS Raspberry Pi ................... no

EGLFS X11 ............................ yes

LinuxFB ................................ no

VNC .................................... yes

Mir client ............................. no

So from this log it appears the EGLFS is supported only through X11 and EGLDevice.

In buildroot the Qt5/eglfs options seems activated:

Target packages

+ --> Graphic libraries and applications (graphic/text)
+--> Qt5

+--> eglfs support

+--> Default Graphical platform --> eglfs

Digging into the buildroot config, I see that the eglfs_viv should be enabled, since the following parameters are enabeled:

BR2_PACKAGE_FREESCALE_IMX_HAS_VIV_GPU [=y]

BR2_PACKAGE_GPU_VIV_BIN_MX6Q [=n] (--> Ok, the CPU is a DualLite)

BR2_PACKAGE_IMX_GPU_VIV [=y]

BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV [=y]

I assume the reason EGLFS is supported only through the X11 backend is due to the missing "EGLFS i.Mx6" option in Qt.
Is that true? Am I missing something? Is it possible to start the application not using the X11 backend and using directly Vivante ?

Thanks in advance!

Michele Bucceri

To what I remember, fsimx6_qt5_defconfig, but I can't remember exactly. Is there any log where I can check?

Which is the correct one for the dual-lite?

Thanks!

Yes, you are right, it works!

I initially tested the plain configuration (without qt) and then switched to the qt_defconfig.

Make distclean fixed the things, and now it works flawlessy!

Thanks a lot!

Michele