#0 VMM7100 adapter was already firmwared with DP>HDMI 7.02.112 earlier
#1 Limit output format with 'RGB 8b' only
I used patch-edid.md
https://gist.github.com/ejdyksen/8302862 >
https://gist.github.com/adaugherity/7435890
Received 4K@60 8b 3L6 instead of 4K@60 12b 4L8 message == RGB 8b is locked!
#2 Add 4K@120 resolution by SwitchResX, Pixel Clock 1075,85Mhz
#3 Restart Mac or toggle VMM7100 cable == WOW it does work
4K@120 RGB 8b 4L8!
After steps #1 #2 inside /Library/Displays/Contents/Resources/Overrides/ folder
for LG C1 you will see ./DisplayVendorID-1e6d/DisplayProductID-c0c8 file (attached here too)
My cooked EDID is:
Code:
<key>IODisplayEDID</key>
<data>
AP///////wAebcjAAQEBAQEfAQSFoFp4Au6Ro1RMmSYPUFShCAAxQEVAYUBxQIGA0cAB
AQEBCOgAMPJwWoCwWIoAQIRjAAAeb8IAoKCgVVAwIDUAQIRjAAAeAAAA/QAYeB7/dwAK
ICAgICAgAAAA/ABMRyBUViBTU0NSMgogAWdwESQDAAMAFECkAQD/Dk8AB4AfAG8IfgBw
AAcACwAKU3dpdGNoUmVzWFUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
kA==
</data>