display and emmc build

  • After building fsimx8mm_qt5_wayland_mmc_defconfig and transferring the sdcard image to the emmc, the display does not show anything after boot.

    When I try to write to the framebuffer this error is displayed:

    open /dev/fb0: No such file or directory

    The display is 7" TFT LVDS Display mit PCAP Touch (J070WVTC0211).

    I suppose the devicetree is not correct. I use picocoremx8mm.dtb that comes with the build.

    I attached the command line output if that helps.

  • Dear Mr. Rohr,

    I guess the default device-tree which you are using does not have the display support for J070WVTC0211. So you should have the following dtb file "picocoremx8mm-lcdif-tc358764-j070wvtc0211.dtb" in your buildroot directory "output/images". Please install this file on your emmc partition and rename it to "picocoremx8mm.dtb". This should fix your issue.

    Your F&S Support Team

    F&S Elektronik Systeme GmbH
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