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adv7441a Vertical blanking data probem

Question asked by Simon on Nov 22, 2010
Latest reply on Nov 22, 2010 by DaveD

i am using my encode board with adv7441a and i need the signal line hot plug and auto detect funtions.The  auto detect funtion is almost done.

but there is a problem in hot plug funtion.when i pull out and reconnect the signal line,there is a wide black line in the middle of the screen,which i think is the vertical blank data.and everytime i hot plug the signal line it moves a little bit.

is there ant register in CP can set the vertical blank data position?or any other measure to solve this probem?

forgot to mention,HDMI VGA COMP all have this issue..