Is it possible to activate TV output?
I'm not sure I understan your question, the TV ouput is working with the 2.6.35 kernel image (first listed) here https://www.olimex.com/wiki/IMX233#Software
the experimental 3.x kernel still have no TV output if this is what you ask, if you want TV output use 2.6.35
I've an original 2.6 kernel released by Freescale with perfectly working TV out, get it from here:
https://drive.google.com/file/d/0B5RB6TqFSILBMVZPUnRrWjNEdjg/view?usp=sharing
> cat /proc/version
Linux version 2.6.35.3_OLinuXinoR4 (hehopmajieh@hehopmajieh-office) (gcc version 4.7.1 20120421 (prerelease) (GCC) ) #11 PREEMPT Mon May 21 10:27:52 EEST 2012