[Bug 70301] New: [IT6506 Display Receiver] DP hotplug fails (display and audio) with i915/kernel 3.11.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70301

          Priority: medium
            Bug ID: 70301
          Assignee: chris at chris-wilson.co.uk
           Summary: [IT6506 Display Receiver] DP hotplug fails (display
                    and audio) with i915/kernel 3.11.1
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ken.lin at advantech.com.tw
          Hardware: x86 (IA32)
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Created attachment 87310
  --> https://bugs.freedesktop.org/attachment.cgi?id=87310&action=edit
environment info, kernel log, intel reg, bios info, Xorg info

1. The DP display function(for IT6506 receiver and IT6505 transmitter) is
working with i915/kernel 3.9.5 but failed with i915/kernel 3.1x.
2. It seems having to do with intel_dp.c (it works if I replace
intel_dp.c/kernel 3.1x with intel_dp.c/kernel 3.9.5)

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