Public bug reported:

A machine being certified needs two commits from drm-intel-next:

commit 22a2c8e0457f5d66db0819a49beb8c119d8f7a97
Author: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
Date:   Tue Nov 15 12:59:06 2016 -0800

    drm/i915: Validate mode against max. link data rate for DP MST

commit fd81c44eba9ca1e78d0601f37b5d7819df522aa7
Author: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
Date:   Mon Nov 14 13:50:20 2016 -0800

    drm/i915: Fix DP link rate math


these fix issues getting extended display mode working with a 4k monitor on a 
built-in MST hub.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Triaged

** Affects: linux (Ubuntu Xenial)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: In Progress

** Affects: linux (Ubuntu Yakkety)
     Importance: Undecided
         Status: New

** Also affects: linux (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
       Status: New => Triaged

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Timo Aaltonen (tjaalton)

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https://bugs.launchpad.net/bugs/1657353

Title:
  Backport DP MST fixes to i915

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