Support DisplayID 1.3 (needed for some 4K monitors)
Submitted by Adam Goode
Assigned to Xorg Project Team
Some 4k displayport monitors are actually 2 monitors glued together. DisplayID 1.3 gives some "tiling" information that lets the system treat these 2 monitors as one. Xorg should support this to fully support these kinds of monitors.
Example monitor: Dell UP2414Q
"To display 3840 x 2160 at 60 Hz, DP1.2 must be enabled and the DP source’s graphics card must be DP1.2 certified with MST feature, capable of supporting resolution up to 3840 x 2160 at 60Hz and its driver supports DisplayID v1.3."