Transformed Driver Linux Embedded for imx28

  • Hi all,
    I'm working with the board imx28 with 7-inch display, however, my application should be rotated 90 degrees, but when i tried to export the export QWS_DISPLAY=Transformed:Rot90:0 i get the following response:

    Transformed: Driver not found

    how can I install the drivers? recompiling the kernel through the ltib?
    I do not know where to start install the driver can anyone help me?
    Thank You!

  • Lifetime Qt Champion


    You need to enable it when configuring Qt 4

  • I am not sure how to configure qt, directly on embedded linux? thank you

  • Lifetime Qt Champion

    Sorry, I wasn't precise enough. When configuring Qt before cross-compiling it

  • @SGaist
    Hello, just to confirm, by configuring qt for embedded, the transformed driver will be built (as *.so file), and it can be added to a project via "Add External Library"?


  • Lifetime Qt Champion

    You don't need to add it to your project, it will be used if you pass the corrected parameters when starting your application.

  • @SGaist

    I am using Bitbake "meta-toolchain-qte" for my SDK, Qt Creator 3.3.0, for my IDE, and I downloaded Qt 4.8.5 libraries here: I extracted the archive and configured Qt like this(note: I am running Ubuntu 12.04 64-bit, and my target is a 32-bit Freescale i.MX6Q SABRE SD:

    ./configure -embedded arm -prefix ./installdir -qt-gfx-transformed  -platform qws/linux-x86_64-g++ -xplatform qws/linux-arm-gnueabi-g++ -nomake examples -nomake demos -no-webkit -no-javascript-jit -nomake translations -little-endian -host-little-endian 

    After doing make and make install, I opened Qt Creator and saw that a new qmake executable (64 bit) is available, so I made a new kit with the new qmake + SDK compiler from Bitbake meta-toolchain-qte. I added this to .pro file

    QTPLUGIN += qgfxtransformed

    And added this above my main() function in main.cpp


    I built my application but got this error: error: expected constructor, destructor, or type conversion before '(' token

    Do I have to build the gfxtransformed drivers manually, seeing that there are .pro files for the transformed drivers included in the Qt 4.8.5 archive, so that I can use them to rotate my GUI?

    Apologies for replying to an old thread

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