Your system is Valleyview. Just a hunch, but in the patch try replacing:
+ } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
with
+ } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev) || IS_VALLEYVIEW(dev))
{
Will ask upstream about it.
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https://bugs.launchpad.net/bugs/1384342
Title:
kernel messages intel_crtc_wait_for_pending_flips correlate to compiz
hang
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