1 HDMI The audio and video channels , To learn ;

2 DDC access , It's about IIC Interface , Read the upstream device's EDID perhaps E-EDID data ;

EDID Before 128 The byte data format is as follows :( There may be different versions , There may be differences in the format )

Other 128 byte ( The format of the extended byte is as follows :)

Above picture 4~d-1(data block collection) The data format of is as follows :

The last data block in the image above (VSDB) The data format of is as follows :