Hi Kirill,
I can duplicate the problem here and "rep enc off" should resolve the problem. I need to contact the software team to figure out why this is happening.
In the mean time what version of the application is installed on that board. It can be found immedaitely after U-Boot loads the image and looks something like
Advantiv Video Evaluation Board Software Version: 1.55
EVAL-ADV7842-7511 Application Built on Jun 11 2012 at 11:29:28
In the mean time can you work with HDCP enabled?