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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL-U] System hang when plug in a VGA monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91791#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL-U] System hang when plug in a VGA monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91791">bug 91791</a>
from <span class="vcard"><a class="email" href="mailto:gary.c.wang@intel.com" title="Gary Wang <gary.c.wang@intel.com>"> <span class="fn">Gary Wang</span></a>
</span></b>
<pre>Hi Jim,
It seems to be necessary adding DDI PLL mapping in intel_mst_pre_enable_dp
method (please refer
<a href="http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/intel_dp_mst.c#L188">http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/intel_dp_mst.c#L188</a>).
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.</pre>
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