LVDS configuration

Discussion in 'SECOSBC-A62' started by stefanpini, Apr 20, 2016.

  1. stefanpini

    stefanpini New Member

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    Hi,
    I'm trying to set up the LVDS display on the board A62 rev.B with UDOObuntu 2 (release SECOSBC-A62-QUAD).

    I'm using without success this bootargs configuration to start the display:

    setenv mmcargs setenv bootargs console=ttymxc1,115200 fbmem=10M video=mxcfb0:dev=ldb,1280x800M@60,if=RGB24,bpp=16

    The same LVDS display is working fine with this arguments on android 4.4.2:

    setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=ldb,1280x800M@60,if=RGB24,bpp=16 fbmem=10M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M


    Thanks in advance,

    Stefano
     
  2. stefanpini

    stefanpini New Member

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    Is there anyone with a working LVDS?
     
  3. modjo

    modjo Active Member

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    Sorry, but i don't use udoobuntu with the seco (for the moment i'm working with neo and yocto ...). the lvds work fine with the ubuntu image give by seco.
     
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  4. stefanpini

    stefanpini New Member

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    Thank you modjo!

    Which ubuntu did you try? Where can I find it?

    I'm using a display Ampire 1280800N3TZQW.

    I've tested the images from http://www.udoo.org/bsp-download-page/ :

    - uboobuntu2:

    setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=16
    setenv videomode mxcfb0:dev=ldb,LDB-WXGA,if=RGB24,bpp=16
    setenv bootargs_base setenv bootargs ${console_interface} ${memory} ${cpu_freq} fbmem=24M ${videomode} ${root_dev}

    When I boot I see 4 penguins and after 1 second the screen is black with the backlight turned on.

    dmsg1.txt attached

    - android 5.0.2:

    setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=ldb,1280x800M@60,if=RGB24,bpp=16 video=mxcfb1:eek:ff video=mxcfb2:eek:ff fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

    The screen is black and the backlight turned on.

    dmsg3.txt attached


    Any suggestion?
     

    Attached Files:

  5. wurstmann

    wurstmann New Member

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    i think u have to set the correct lvds display-timings in your devicetree
     
  6. modjo

    modjo Active Member

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    you need to contact seco to have access to they ftp, perhaps @SECO_FAE can help more !
     
  7. Andrea Rovai

    Andrea Rovai Well-Known Member

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