[meta-freescale] i.MX6 and QtWayland bad performance and other issue

彥瑾 coldnew.tw at gmail.com
Mon Nov 3 21:25:00 PST 2014

I reply myself.

For those interested this issue, please see:

Note that QtWaylandCompositor IS NOT SUPPORED by Freescale currently, if
you really want to make a device full with Qt like Jolla or WebOS does,
It's more easy to consider another SOC rather than useing i.MX6.

Or, you can test the patch in freescale community, which make
qml-compositor can run as a compositor.

2014-10-20 9:20 GMT+08:00 Yen-Chin Lee <coldnew.tw at gmail.com>:

> Hi, has anyone try playing i.MX6 with QtWayland ? I find out the
> QtWayland application performance is really bad, worse than running the
> same
> application under X11 or EGLFS.
> I use `Cinematic Experience' as my testing app, here is the
> cinematicexperience running under weston with qtwayland.
> https://www.dropbox.com/s/3au5mmlvkroerh5/i.mx6%20with%20qtwayland.mp4?dl=0
> However, compare the application speed wth EGLFS platform, you will find
> the QtWayland on i.MX6 is really slow.
>   https://www.dropbox.com/s/nmjbzue7k5rxwz6/i.mx6%20with%20eglfs.mp4?dl=0
> Expect for the bad performance, I also can't run QtWayland's examples,
> ex: qml-compositor
> When I try to run the qml-compositor, there's an EGL error.
>    root at machine:/usr/share/qt5/examples/wayland/qml-compositor#
> ./qml-compositor -platform eglfs
>    QEglFSImx6Hooks will set environment variable FB_MULTI_BUFFER=2 to
> enable double buffering and vsync.
>    If this is not desired, you can override this via: export
>    QtCompositor: Failed to initialize EGL display. Could not find
> glEGLImageTargetTexture2DOES.
> Sine the compositor can't initialize EGL display, I can't running either
> opengl app nor QtQuick2 application via wayland protocol.
> But weston compositor can run well under the fb-backend.so, just the
> slow qtwayland performance problem (weston-simple-egl works fine).
> Since my goal is use Qt as the core of my system, it will be nice to run
> QtWayland and build a compositor in purely Qt, like Jolla's Salifish does.
> Is there anyway to make QtWayland and it's example run well under i.MX6 ?
> Here is my libraries version and what I do.
> Here is my machine info:
>    CPU: i.MX6 DuleLite
>    DRAM: 1GB (176MB for GPU)
>    Kernel: 3.10.17-1.0.1_ga
>    Type: Based on wandboard
>    meta-freescale branch: master
>    meta-qt5 branch: master
> I use Qt 5.3.2 and QtWayland-git branch 5.4 (commit: c3d2a7b), which
> need to add a backport patch to build with Qt 5.3.2, you can find the
> patch at following link
>    http://pastebin.com/gZFxSgRa
> To use qtwayland, you need to setup `QT_WAYLAND_IGNORE_BIND_DISPLAY=1`
> variable since
> i.MX6 Vivante do not use eglBindWaylandDisplayWL() to bind the
> wl_display to the EGL display. For more information, please see
> https://qt.gitorious.org/qt/lkundrak-qtwayland/commit/4d4fe579225ac089b24912bf8fad5585e615ce6b
> Note:
> [1] You can find Qt 5.3.2 in meta-qt5 master branch
>     https://github.com/meta-qt5/meta-qt5.git
> [2] I also testing the libhybris on i.MX6 with Android 4.4.2_r1, but the
> qml-compositor example also can't run and the qt5-qpa-hwcompositor QPA
> plugin performance is not so good like qtwayland.
> If you interesting to testing i.mx6 with libhybris, you can find some
> info in
>     https://github.com/aosp-hybris
> The libhybris please to use following repo
>     https://github.com/aosp-hybris/libhybris   (branch: test_viv)
> Currently aosp-hybris project just put on hold (temporarily halted)
> until my company's work finish. But if you interested in how to run
> i.MX6DL under wandboard with libhybrs, you can contacts me for the image.
> --
> Sent with my emacs
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/meta-freescale/attachments/20141104/1db33e78/attachment.html>

More information about the meta-freescale mailing list