[Bug 87632] New: [PNV] testdisplay -f causes WARNING: check_crtc_state+0x9a9/0x9ff [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87632

            Bug ID: 87632
           Summary: [PNV] testdisplay -f causes WARNING:
                    check_crtc_state+0x9a9/0x9ff [i915]()
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jeff.zheng at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111213
  --> https://bugs.freedesktop.org/attachment.cgi?id=111213&action=edit
dmesg

==System Environment==
--------------------------
Regression: No.I fail to find a good commit. Tried drm-intel-testing 2014-08-09
commit 0c6aad835dd1b817e87e312da0350e07952ff25e

Non-working platforms: Pineview(test machine: x-pnv1)


==kernel==
--------------------------
3.18.0 commit b2776bf7149bddd1f4161f14f79520f17fc1d71d

==Bug detailed description==
-----------------------------
Running "./testdisplay -f 38.25,800,832,912,1024,600,603,607,624" and exit with
"CTRL-C", dmesg shows WARNING:
[  242.655524] WARNING: CPU: 0 PID: 3685 at
drivers/gpu/drm/i915/intel_display.c:10968 check_crtc_state+0x9a9/0x9ff
[i915]()


==Reproduce steps==
---------------------------- 
1. ./testdisplay -f 38.25,800,832,912,1024,600,603,607,624
2. CTRL-C to exit
3. dmesg |grep WARNING

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