Comment 5 for bug 1398277

I don't have a commits list for this, but it could work on Wily 15.10.
But you should back port the following patches to support HDMI / DP hotplug
25adc13 ALSA: hda - Wake the codec up on pin/ELD notify events
45c053d ALSA: hda - allow codecs to access the i915 pin/ELD callback
51e1d83 drm/i915: Call audio pin/ELD notify function
2a8ceed drm/i915: Add audio pin sense / ELD callback