[Bug 87850] New: [BYT]igt/kms_plane/plane-panning-bottom-right-pipe-A-plane-1 sporadically fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87850

            Bug ID: 87850
           Summary: [BYT]igt/kms_plane/plane-panning-bottom-right-pipe-A-p
                    lane-1 sporadically fails
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111500
  --> https://bugs.freedesktop.org/attachment.cgi?id=111500&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure

Non-working platforms:  BYT

==kernel==
--------------------------
drm-intel-nightly/4fa23142a15526f4a4b5df61f26eacdd558a849
commit 4fa23142a15526f4a4b5df61f26eacdd558a849a
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Fri Dec 19 15:33:33 2014 +0100

    drm-intel-nightly: 2014y-12m-19d-14h-33m-07s UTC integration manifest

Bug detailed description:
-------------------------
Following cases sporadically fail on BYT. Fail rate: 4/5.
igt/kms_plane/plane-panning-bottom-right-pipe-A-plane-1
igt/kms_plane/plane-panning-bottom-right-pipe-A-plane-2
igt/kms_plane/plane-panning-bottom-right-pipe-A-plane-3
igt/kms_plane/plane-panning-bottom-right-pipe-B-plane-1
igt/kms_plane/plane-panning-bottom-right-pipe-B-plane-2
igt/kms_plane/plane-panning-bottom-right-pipe-B-plane-3

Run ./kms_plane --run-subtest plane-panning-bottom-right-pipe-A-plane-1
output:
IGT-Version: 1.9-geb799b2 (x86_64) (Linux:
3.18.0_drm-intel-nightly_4fa231_20141229+ x86_64)
Testing connector eDP-1 using pipe A plane 1
Test assertion failure function test_plane_panning_with_output, file
kms_plane.c:317:
Failed assertion: igt_crc_equal(&test.blue_crc, &crc)
Subtest plane-panning-bottom-right-pipe-A-plane-1: FAIL (2.812s)

Reproduce steps:
-------------------------
1. ./kms_plane --run-subtest plane-panning-bottom-right-pipe-A-plane-1

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