[Bug 83029] New: [BYT]igt/kms_rotation_crc/sprite-rotation fails sporadically

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83029

          Priority: medium
            Bug ID: 83029
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT]igt/kms_rotation_crc/sprite-rotation fails
                    sporadically
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 105208
  --> https://bugs.freedesktop.org/attachment.cgi?id=105208&action=edit
dmesg

==System Environment==
--------------------------
Regression: Not sure. 
The test causes system hang before (bug 82237)
The fail rate about 50%

Non-working platforms: BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 257d90d13794c2eb545ab0d6c708f21e2a0378b6(fails)
    drm-intel-nightly: 2014y-08m-21d-10h-03m-09s integration manifest
origin/drm-intel-next-queued: 3a5f87c286515c54ff5c52c3e64d0c522b7570c0(causes
system hang bug 82237)
    drm: fix plane rotation when restoring fbdev configuration
origin/drm-intel-fixes: 1a125d8a2c22b11741fc47d4ffcf7a5ffa044dd3(skips)
    drm/i915: don't try to retrain a DP link on an inactive CRTC

==Bug detailed description==
igt/kms_rotation_crc/sprite-rotation fails

Output:
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_rotation_crc --run-subtest sprite-rotation
IGT-Version: 1.7-g4d2f511 (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_257d90_20140824+ x86_64)
Test assertion failure function test_plane_rotation, file
kms_rotation_crc.c:184:
Failed assertion: igt_crc_equal(&data->ref_crc, &crc_output)
Subtest sprite-rotation: FAIL
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_rotation_crc --run-subtest sprite-rotation
IGT-Version: 1.7-g4d2f511 (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_257d90_20140824+ x86_64)
Subtest sprite-rotation: SUCCESS
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_rotation_crc --run-subtest sprite-rotation
IGT-Version: 1.7-g4d2f511 (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_257d90_20140824+ x86_64)
Test assertion failure function test_plane_rotation, file
kms_rotation_crc.c:184:
Failed assertion: igt_crc_equal(&data->ref_crc, &crc_output)
Subtest sprite-rotation: FAIL
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_rotation_crc --run-subtest sprite-rotation
IGT-Version: 1.7-g4d2f511 (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_257d90_20140824+ x86_64)
Subtest sprite-rotation: SUCCESS
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests#
./kms_rotation_crc --run-subtest sprite-rotation
IGT-Version: 1.7-g4d2f511 (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_257d90_20140824+ x86_64)
Subtest sprite-rotation: SUCCESS

==Reproduce steps==
---------------------------- 
1. ./kms_rotation_crc --run-subtest sprite-rotation

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