Well, dni1337's fork hast just these changes from loboris's:
https://github.com/dni1337/OrangePI-Kernel/commits?author=dni1337
Maybe they are helpful for what you are looking for?
To quote:
---
Commits on Nov 13, 2015
@dni1337
Merge branch 'master' of
https://github.com/dni1337/OrangePI-Kernel
dni1337 committed on 13 Nov 2015
@dni1337
changed 720P_50 to 1024x768 for 4/3 Monitors over HDMI
dni1337 committed on 13 Nov 2015
Commits on Nov 10, 2015
@dni1337
changed 720P_60 to 1280x1024 for 4/3 Monitors over HDMI
dni1337 committed on 10 Nov 2015
@dni1337
changed 720P_60 resolution to 1280x1024 for 4:3 Displays over HDMI
dni1337 committed on 10 Nov 2015
---
Last changes by loboris were Nov 8th.