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iMX53 QSB: CVBS not working properly

Question asked by Xavier Boudes on Nov 5, 2012
Latest reply on Feb 5, 2015 by Mlinux L
Branched to a new discussion

Hi All,

 

I am working on the iMX53 QSB running uBoot and Linux and I tried to have a LVDS screen (fb0 primary) and a CVBS (fb1) output working at the same time.

The LVDS is fine and display exactly what I want but the CVBS output doesn't work properly:

- I get some video on my connected screen in PAL or NTSC format but the colours are wrong.

- As soon as I unblank fb1 my display detect the video and I get a screen with a dark green background

- Then it does display my test images but the colours don't match (see pics)

 

CVBS

IMG_20121105_163132.jpg

LVDS

IMG_20121105_164321.jpg

 

 

The screen is connected on the VGA connector - pin 2, and here are the modifications I have done:

- in mx53_loco.c: ".boot_enable = MXC_TVE_TVOUT;"

- in uboot: "video=mxcdi1fb:RGB24,TV-PAL tve=di1"

 

Has anybody encountered this issue?

Have I missed something?

 

Regards

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