EVM8168 - Change the mode on HDMI VENC(display0)

Hi,

I followed the instructions at http://processors.wiki.ti.com/index.php/DM816X_AM389X_VPSS_Video_Driver_User_Guide#Change_the_mode_on_HDMI_VENC.28display0.29 to change the display mode back and forth.

Initially, the graphic display is as follows (1080p-60):

Then I changed it to 720p-60 and got the following screen.

Then I changed the mode back to 1080p-60 and got the following distorted, doubled graphic display.

How do I recover the original display (without resetting, that is)?

Thanks

Binh