This is a protocol where a display device can publish its capabilities to a video source. I.e. a TV publishing its supported resolutions to a DVD Player. It is commonly encountered with HDMI. Note if you have a HDMI mixer, or HDMI extender, this may affect EDID.
EDID - Extended Display Identification Data
Managing a Display EDID on windows | NVIDIA
Custom Resolution Utility (CRU) for windows
EDID/DisplayID Writer for Windows
Linux:
# Some systems support runtime EDID changes
echo "edid/new_monitor.bin" > /sys/module/drm_kms_helper/parameters/edid_firmware
# Trigger hotplug event
echo 1 > /sys/kernel/debug/dri/0/HDMI-A-1/trigger_hotplug
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