I have built a Yocto image with the following configuration
# Architecture of the host machine
SDKMACHINE ?= "x86_64"
# Extra image configuration defaults
EXTRA_IMAGE_FEATURES = "debug-tweaks ssh-server-openssh"
CORE_IMAGE_EXTRA_INSTALL += "openssh-sftp openssh-sftp-server"
INIT_MANAGER = "systemd"
INHERIT += "rm_work"
# Extra packages
LICENSE_FLAGS_WHITELIST = "commercial"
DISTRO_FEATURES:remove = " \
x11 \
directfb \
vulkan \
wayland \
"
DISTRO_FEATURES:append = " \
alsa \
opengl \
gles2 \
"
IMAGE_INSTALL:append = " \
coreutils \
qtbase-plugins \
qtbase-tools \
qtdeclarative \
qtdeclarative-plugins \
qtdeclarative-qmlplugins \
qtdeclarative-tools \
qtimageformats-plugins \
qtmultimedia \
qtmultimedia-plugins \
qtmultimedia-qmlplugins \
qtquickcontrols2 \
qtquicktimeline \
qtscript \
qtsvg \
qtsvg-plugins \
qtsystems \
qtsystems-qmlplugins \
qtsystems-tools \
rsync \
"
PACKAGECONFIG:append:pn-qtbase = " \
eglfs \
fontconfig \
gles2 \
libpng \
jpeg \
libs \
widgets \
"
# Image file system types to package
IMAGE_FSTYPES = "rpi-sdimg"
# Package management configuration
PACKAGE_CLASSES = "package_ipk"
MACHINE ??= "raspberrypi4"
DISTRO ??= "poky"
BBMULTICONFIG ?= ""
I could successfully build and generate and SDK. I can build the Qt app and deploy it to the device.
I set
QT_QPA_PLATFORM=eglfs
DISPLAY=:0
but I get the error
EGL library doesn't support Emulator extensions
Aborted
The error looks similar to
QT Creator can not remote run and debugging on i.Mx6 (buildroot)
but since the Pi doesn't have a Vivante driver, I wouldn't know what to pass. I tried to search for integrations
$ find / -name "*egl*"
/usr/lib/plugins/video/videonode/libeglvideonode.so
/usr/lib/plugins/videoeglvideonode
/usr/lib/plugins/egldeviceintegrations
/usr/lib/plugins/egldeviceintegrations/libqeglfs-emu-integration.so
/usr/lib/plugins/egldeviceintegrations/libqeglfs-kms-integration.so
/usr/lib/plugins/egldeviceintegrations/libqeglfs-kms-egldevice-integration.so
/usr/lib/plugins/platforms/libqminimalegl.so
/usr/lib/plugins/platforms/libqeglfs.so
but eglfs-kms
or all other combinations I have tried, don't work.
If I try
QT_QPA_EGLFS_INTEGRATION=none
I get
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
Cannot find EGLConfig, returning null config
EGL Error : Could not create the egl surface: error = 0x300b