[meta-freescale] REGRESSION: Qt5 EGLFS support is broken 3.10.53-1.1.x and 3.14.28-1.0.x GPU

Otavio Salvador otavio.salvador at ossystems.com.br
Tue Sep 1 04:48:43 PDT 2015

On Tue, Sep 1, 2015 at 5:20 AM, Sriraman Ravi <sriraman.ravi at microsys.de> wrote:
> I have been facing issue with EGLFS in QT5, I am also using fido branch for
> QT5 and the kernel built is 3.10.17 for imx6q board from freescale.
> The video widget example application was not running videos properly
> specially videos with high definition. There were lot of warnings saying "A
> lot of buffers are dropped". This problem while using EGLFS and linuxfb.
> Then i built and installed the QTgstreamer package which has a different
> implementation for creating video surfaces. The example player application
> in QT-gstreamer works fine for X11 windowing system and Linuxfb, the videos
> are played smoothly, but when i try to run the same example application with
> EGLFS it crashes and no error message is displayed. I tried enabling debug
> messages but no luck.

There is more involved in what you describes:

 - gstreamer
 - qtmultimedia
 - qtbase

Qt 5.4 does not has support for GStreamer1.0 natively, there is a
patch[1] for it.

1. https://github.com/meta-qt5/meta-qt5/blob/fido/recipes-qt/qt5/qtmultimedia/0001-Initial-porting-effort-to-GStreamer-1.0.patch

For our customers needing GStreamer we have made a custom QtMultimedia
5.5 to work against Qt 5.4 and this proved to be working fine for our
customers; I don't remember exactly what issues we had with the patch
but we eventually moved for a custom version for this set of

Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750

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