LG TV Tile Mode

From a manual:

39. Tile Mode (Command: d d)
To set a Tile Mode and Tile Column/ Row values.
Transmission
[d][d][ ][Set ID][ ][Data][Cr]
Data 00 to FF: 1st byte - Tile Row
2nd byte - Tile Column
*00, 01, 10, 11 means Tile Mode Off.
Acknowledgement
[d][ ][Set ID][ ][OK/NG][Data][x]
** It may not be supported depending on the model.

for a 2x2 setup use 'dd 0 22' to turn on and 'dd 0 00' to turn off.

ID is 0 for all displays