[nyanpasu64]

I have (too much) experience in EDID editing. My suggestions:

- AW EDID Editor as you mentioned.

- CRU is a Windows-only tool, and will modify the EDID files it dumps from monitors (removing serial/etc. descriptors to make room for detailed resolutions), but will work. It does not run under Wine.

- 010 Hex Editor has an EDID template.

- On Linux you can install wxEDID from Flatpak (IIRC the distribution packages would crash in WxWidgets). I don't think it can create sections though.

- v4l-utils has edid-decode (which can be used as a git diff textconv tool), though this does not help you encode EDID files.

I found that HDMI EDIDs have a CEA extension block while DP EDIDs have a DisplayID extension block. I haven't done any work in multi-page EDIDs with over 256 bytes (and don't know what EEPROM chip you'd use to emulate them, nor the protocol or APIs to read and write them).