What is the current status of Qt on the imx6 (sabre sd)?

[phil_martin]

What is the current status of Qt on the imx6?

I want to run Qt on a Sabre SD-based platform - is Qt4.8 or Qt 5.0, 5.1 the best way to go?

I am using the Linaro Linux build.

Thanks!

Phil

[RobertSchwebel]

Philip,

we have Qt 5.1 running on linux-3.12-rc3. The Qt 5.2-alpha release from yesterday still has issues, but 5.1 works nicely. On mainline, we are using the KMS/DRI drivers which are still in staging, with a hack layer which makes it possible to simulate the vsync-by-panning method used by the proprietary EGL drivers.

Note that with the current proprietary drivers, features like QtWebKit with out-of-process rendering are not possible. However, standard Qt + QML2 works, at least in fullscreen single application setups.

rsc

[phil_martin]

Thank for your input, Robert!

- I'm not a Linux guru, and I really need something that will work without any hack-layers (unless they are part of the build!)

It doesn't sound like you're using Yocto

- is there a reason for this?

Thanks

Phil

[leonoss]

Does someone have a good recipe to follow to build Qt5 using Yocto? I am starting a project using the i.mx6 SabreLite board (populated with WInd River Linux) which is supposedly Yocto ready.

Using the oecore-x86_64 toolchain, I have been able to build/cross compile the Qt sources and deploy them on the i.mx6 board but even simple example programs fail with the "EGL suggested using X Visual ID 33 (RGB888) for EGL config 25 (RGB444), but this is incompatable" error. Despite trying many of the suggested solutions on the web, I can't get around it.

Given the push towards Yocto,  I thought I would try that path instead but can't find a good "how-to guide" for using Yocto to build Qt.

Thanks.

[LeonardoSandova]

Hi, I think there is no document regarding this important area. QT5 is pretty new in Freescale Yocto. I believe the best way is to ask for these steps into the meta-freescale list. In general, you need to add meta-qt5 recipe and change the default DISTRO (AFIAK, QT5 does not work correctly with X11, which is the default graphics System) into your local.conf file. Ask for the details on the list.

Leo

[bfederau]

Hi Robert,

does your Qt 5.1 work on X11 with xcb? With my Qt5.1 build on Ubuntu 12.04 I get this EGL config message when I start a Qt application

Warning: EGL suggested using X Visual ID 33 (RGB565) for EGL config 28 (RGB444), but this is incompatable

Unable to find an X11 visual which matches EGL config 28
Could not initialize EGL

Any hints are welcome.

[LeonardoSandova]

Philip,

There is a new layer 'meta-qt5' which can be integrated with meta-fsl-arm on Yocto. Not sure the latest status but check or ask for the latest on meta-freescale distribution list.

Leo

[phil_martin]

I am running on LTIB currently

- and looking at adding Qt to that

However, would you recommend moving to Yocto currently?

- i.e. is it stable enough yet?

- is it fully supported with the latest packages?

I also need gstreamer support, multi-screen support and (parallel-bus) camera support

- so need to know if Yocto is better for this also!

If I go with Yocto, does it still support the Ubuntu GUI, or similar?

(sorry, I'm not a Linux guru!)

Thanks

Phil

[SergioSolis]

Hello Philip,

Qt 5.0 would be the best option right now for the i.MX6

[phil_martin]

Are you running under Yocto or LTIB?

- I'm trying to decide if I should jump ship from LTIB to Yocto!