LVDS configuration

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

 

Is there anyone with a working LVDS?

 

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.

 

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=mxcfb1ff video=mxcfb2ff 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?

 

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

 

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

 

@stefanpini you should contact SECO for this.