[Bug 91791] [SKL-U] System hang when plug in a VGA monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91791

--- Comment #28 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Gary Wang from comment #27)
> Hi Jim,
> 
> It seems to be necessary adding DDI PLL mapping in  intel_mst_pre_enable_dp
> method (please refer
> http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/intel_dp_mst.
> c#L188). 
> But it still got failed after I wrote DPLL_CTRL2 with corresponding port for
> it, and need to check it in related spec further, upset.

I tried to fix something along those lines for SKL:
http://lists.freedesktop.org/archives/intel-gfx/2015-August/073965.html

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