Ankur Maheshwari

Dual Display on EVK board

Discussion created by Ankur Maheshwari on Nov 9, 2011
Latest reply on Nov 10, 2011 by Ankur Maheshwari

Hi,

 

Can anyone suggest how do I get dual display VGA and LCD working on EVK board.

I could see EVK supports VGA, LCD and LVDS.

By default display is coming on LCD i.e. without any u-boot passed command line argument.

Looking at forums and imxdev.org and IMX53UG.pdf I understood that I need to pass multiple video= argument and VGA port will start working. (all the docs are mentioning about QSB or SABRE)

 

Mainly I followed following link and got Ubuntu up and running on EVK board with LCD touch display

http://www.imxdev.org/wiki/index.php?title=I.MX53_QSB_Ubuntu_Dual_Display

 

But on same trial as mentioned on link, VGA did not come up. I tried VGA, VGA-XGA, 800x600, 800x480 - 16@60/55 options but still could not see anything on VGA monitor. Also I did unblanking of fb from /sys/class/graphics/fb[0/1/2]/blank but of no use for VGA case.

I am finally looking into /arch/arm/mach-5x/mxc53_evk.c file fb_data structure, it provides CLAA-WVGA (I understand its for LCD) and 1024x786M-16@60 (may be for VGA, but looks to usually used for HDMI in imx53 boards variant).

I feel I am missing some info, I have raise same query to freescale tech support, but they are yet to comeback... I don't know how much time that shall take.

 

If anyone of you have tried dual-display on EVK, please let me know setting/changes...

 

Thanks in advance

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