i.MX6QuadPlus - Problem - Qt5.9 EGLFS + kernel 4.9.126 : "Could not open egl display"

[flaviosuligoi]

Hi all,

I'm using an i.MX6qp custom board with a Yocto "rocko" image (no X11, Qt5.9 with EGLFS support):

• Linux kernel from:
  • https://github.com/Freescale/linux-fslc.git 
• Qt5.9 from:
  • meta-qt5 (rocko)
    •  https://github.com/meta-qt5/meta-qt5.git

All the Qt demos works fine in EGLFS (i.e. cinematicexperience-1.0) with the standard "rocko" kernel 4.1.42 (branch 4.1-2.0.x-imx), but the Qt doesn't work with the new kernel 4.9.126 (branch 4.9-2.0.x-imx).

I have the following error:

./Qt5_CinematicExperience
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_viv")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv", "eglfs_emu")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_viv"
Could not open egl display
Aborted (core dumped)

With strace I have the following error:

....

....

....

openat(AT_FDCWD, "/dev/galcore", O_RDWR) = 6
ioctl(6, _IOC(0, 0x75, 0x30, 0), 0x7e9486b0) = -1 ENOTTY (Inappropriate ioctl for device)
write(2, "Could not open egl display\n", 27Could not open egl display
) = 27
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, ~[RTMIN RT_1], [], 8) = 0
getpid() = 442
gettid() = 442
tgkill(442, 442, SIGABRT) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=442, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)

The Qt related environment variables are:

xport QPEDIR
export QSG_INFO="1"
export QTDIR
export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER="1"
export QT_LOGGING_RULES="qt.qpa.*=true"
export QT_QPA_DEBUG="1"
export QT_QPA_EGLFS_DEBUG="1"
export QT_QPA_EGLFS_DEPTH="32"
export QT_QPA_EGLFS_FB="/dev/fb0"
export QT_QPA_EGLFS_HEIGHT="600"
export QT_QPA_EGLFS_WIDTH="800"
export QT_QPA_PLATFORM="eglfs"

Any suggestions?

Thanks,

Flavio Suligoi

[gary_bisson]

Hi,

It looks like your galcore kernel driver version doesn't match the VIvante libraries version.

Have you tried running any Vivante demo apps just to check that 3D is working fine?

As a FYI, rocko uses libs 5.0.11.p8.6-hfp.bb but I don't believe the 5.0.11.p8.6 kernel module can build against a 4.9 kernel:

meta-freescale/recipes-graphics/imx-gpu-viv at rocko · Freescale/meta-freescale · GitHub 

meta-freescale/recipes-kernel/kernel-modules at rocko · Freescale/meta-freescale · GitHub 

Regards,

Gary

[flaviosuligoi]

Thanks Gary,

when I have time I'll try to update all my distro to sumo, to align both the the kernel and the Vivante related drivers/libraries

Regards,

Flavio

[andrei_faur]

Hello,

We are currently facing the same issues as Flavio and we have a similar setup: Qt 5.9 with EGLFS, no X11; the platform is imx6QP. However, we use the 4.9.11 linux-imx recipe from the meta-freescale rocko branch.

We have tried both the in-tree imx-gpu-viv kernel driver and the out-of-tree one to which you pointed and none of them work. The in-tree one does not match the userspace library version while the out-of-tree one does not seem to compile against 4.9.11.

Does this mean that the imx6 GPU is not supported at all in the current rocko community layers with 4.9.* kernels?

Do you know if any of the other kernels from the link below work with imx6's GPU?
meta-freescale/recipes-kernel/linux at rocko · Freescale/meta-freescale · GitHub 

Regards,
Andrei

[flaviosuligoi]

Hi Andrei,

did you try to update all your distro to sumo and see what happens?

Regards,

Flavio

[andrei_faur]

Hello, Flavio!

No, we did not try this and there aren't any plans at the moment to do so. 

Regards,
Andrei

[flaviosuligoi]

Thanks Andrei!

Flavio