[Bug 90625] New: [BSW regression] "testdisplay -d 32" core dump

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90625

            Bug ID: 90625
           Summary: [BSW regression] "testdisplay -d 32" core dump
           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 116018
  --> https://bugs.freedesktop.org/attachment.cgi?id=116018&action=edit
dmesg log

==System Environment==
--------------------------
Regression: Yes, don't see this issue on drm-intel-testing-2015-05-08. 
Non-working platforms: BSW
BIOS: V69

==kernel==
--------------------------
-testing: drm-intel-testing-2015-05-22 (fails)

==Bug detailed description==
-----------------------------
"testdisplay -d 32" core dump on BSW:
root at x-bsw14:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./testdisplay -d
32
using depth 32
CRTC(20):[0]  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48
138780
failed to set mode (1920x1080 at 60Hz): Invalid argument
Received signal SIGSEGV.
Segmentation fault (core dumped)

"testdisplay -d 16" and "testdisplay -d 24" are fine.

==Reproduce steps==
---------------------------- 
1. Reboot and login into BSW
2. ./testdisplay -d 32

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