AOC Q2777PQU User Manual page 28

Please refer below table for compatibility of main/sub input source.
PIP
Dual-link DVI
SUB Source
HDMI/MHL
PBP
Dual-link DVI
SUB Source
HDMI/MHL
D-sub
∨
D-sub
∨
∨
∨
DP
D-sub
∨
D-sub
∨
∨
∨
DP
Main Source
Dual-link DVI
∨
∨
∨
∨
Main Source
Dual-link DVI
∨
∨
∨
∨
28
HDMI/MHL DP
∨
∨
∨
∨
HDMI/MHL DP
∨
∨
∨
∨
∨
∨
∨
∨
∨
∨
∨
∨