TS3DV642: concern what kind of application that a single differential lane switching is required.

When EN=H; SEL1=L; SEL2= either H or L

There is only a single differential lane switching is required.

For I mostly use 4 differential lanes, ex. DP or HDMI, 

Just out of curiosity

wondering what kind of interface is that only a single differential lane

or in a case for better signal isolation?