[Bug 83866] New: [Byt Regression]DP monitor fail to be lighted up on every interlaced scanning resolution.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83866

          Priority: medium
            Bug ID: 83866
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Byt Regression]DP monitor fail to be lighted up on
                    every interlaced scanning resolution.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lei.a.liu at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 106294
  --> https://bugs.freedesktop.org/attachment.cgi?id=106294&action=edit
dmesg

==System Environment==
--------------------------
I fail to find a good commit. 

Non-working platforms: Baytrail

==kernel==
--------------------------
-nightly: 43df30da20447e2856b2761215ff274886a9f931 (fails)
    drm-intel-nightly: 2014y-09m-12d-15h-35m-20s UTC integration manifest
-queued: 648fb42d1e77cf90cddea2b1cf1f4ac4453e65e6 (fails)
    drm/i915: Extend BIOS stolen mem handling to all platform
-fixes: e76c8c5979021483a3a6b480cfe360c644a403c0 (fails)
    drm/i915: Fix SRC_COPY width on 830/845g

==Bug detailed description==
-----------------------------
Monitor Manufacturer: ASUS
Monitor mode veision : PA238Q

DP monitor fail to be lighted up on every interlaced scanning resolution.
Resolution details:
1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250
1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74176
1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250

==Reproduce steps==
---------------------------- 
1. ./testdisplay -a
2. check interlaced scanning resolution

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