Expose more EDID fields to userspace

[Simon Ser]

Hi all,

Right now, the kernel parses EDIDs and exposes some of the data to
userspace. For instance, drmModeConnector has mm{Width,Height} and
subpixel.

Generally, userspace also has another EDID parser. For instance,
wlroots uses it just to get the make/model/serial. I've talked about
this at XDC 2018, and someone mentioned it could be a good idea to
de-duplicate the work.

Would it be reasonable to expose those as DRM connector properties?

Thanks,
--
Simon Ser
https://emersion.fr