LVDS 15" configuration on Yocto 'Jethro'

Discussion in 'Other OS' started by Maurice, Feb 21, 2016.

  1. Maurice

    Maurice Active Member

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    I'm trying to create a working solution on the Yocto version from this thread.
    The current problem is that I don't get the 'official' 15" LVDS screen enabled. To be complete, it works fine on the standard UDOObuntu v1.1 (Ubuntu 12). The system does recognize the screen's touch capabilities, and a small program shows that the touch events are indeed readable.

    I have changed the uEnv.txt on the boot partition to reference to contain:
    fdt_file=imx6q-udoo-lvds15.dtb
    video=mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=32

    Unfortunately it doesn't show anything. I've used setenv in uboot to set and store them, and still nothing happens.
    On Christian's suggestion I have also set the variable video_output=lvds in uEnv.txt, and though does make the LVDS screen display something, it is not what I expected.

    [​IMG]

    It should be the same uboot version as is used in the official distro, but obviously this is missing some parameters.
     
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  2. Maurice

    Maurice Active Member

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    Solved with following instructions from UDOO Setup LVDS Panels.

    setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=32
     
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  3. modjo

    modjo Active Member

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    Thank's for your solution !
     
    Andrea Rovai likes this.
  4. Andrea Rovai

    Andrea Rovai Well-Known Member

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    Seems this forum is getting full of great developers! My congratulations @Maurice!!!
     

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