UDOO setup lvds panels

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Attention: Before starting make sure you have the lastest u-boot and kernel. If not you can use the simple update procedure

Using LVDS Panels with UDOOBuntu official OS

The simplest way to use LVDS panels with UDOO is using the UDOO Configuration Tool+

  • Open UDOO Configuration Tool
  • Select Set Default Video Output (LVDS\HDMI) and hit OK
  • Select your LVDS Model ( 7 or 15") and hit OK
  • A dialog should inform you that video boot arguments have been changed correctly
  • In some cases you could be required to choose a resolution. Choose it accordingly to your device.
  • Reboot for changes to take effect

Manual Video Output Configuration

To use your LVDS with UDOO you have to follow these simple instructions.

First connect an external pc to the debug serial of UDOO. Once done connect the serial USB Cable to Udoo and turn it on by plugging the Power Supply.

From your computer, hit a key before normal boot starts up and type the right parameters for your Operating system and LVDS panel.

The default Variable, which outputs to HDMI is:


video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32

Exact UBOOT Parameters

15″ Linux

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

15″ Android

setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=ldb,1366x768M@60,if=RGB24,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

7″ Linux

setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666,bpp=32

7″ Android

setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

HDMI Linux

setenv mmcargs setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} fbmem=24M video=mxcfb0:dev=hdmi,1920x1080M@60,bpp=32

HDMI Android

setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb1:off video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1 androidboot.hardware=freescale mem=1024M

At the next boot the video source will again be the default one unless you save the configuration you just inserted with the command:

saveenv

In Android you can also boot UDOO from both HDMI and LVDS panel at the same time inserting these variables in a different frame buffer:

e.g. boot on lvds 15″ and hdmi.

setenv bootargs console=ttymxc1,115200 init=/init video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666,bpp=32 video=mxcfb1:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb2:off fbmem=28M vmalloc=400M androidboot.console=ttymxc1  androidboot.hardware=freescale mem=1024M


The general Purpose parameters for each video output are:

15″ –> video=mxcfb0:dev=ldb,1366x768M@60,if=RGB24,bpp=32
7″ –> video=mxcfb0:dev=ldb,LDB-WVGA,if=RGB666,bpp=32
hdmi –> video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 (default environment variable)


Touch Calibration

if you have any problem with touch calibration try to modify the text file:

/etc/X11/xorg.conf.d/99-calibration.conf

with this text:

Section "InputClass"
       Identifier      "calibration"
       MatchProduct    "3M 3M USB Touchscreen - EX II"
       Option  "Calibration"   "-75 65106 2318 65008"
       Option  "SwapAxes"      "0"
       Option  "InvertX"      "1"
       Option  "InvertY"      "0"
EndSection
Section "InputClass"
       Identifier      "calibration"
       MatchProduct    "sitronix-i2c-touch-mt"
       Option  "Calibration"   "10 802 11 479"
EndSection


If the calibration is not good enough you can connect a mouse to UDOO and launch the "Calibrate Touchscreen" application from the top bar:

Application -> System Tools -> Administration -> Calibrate Touchscreen

or running in a terminal the command:

xinput_calibrator

and follow the video instruction to change your calibration.