[Bug 82799] New: [BYT-M]igt/kms_cursor_crc/cursor-size-change fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82799

          Priority: medium
            Bug ID: 82799
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT-M]igt/kms_cursor_crc/cursor-size-change fails
        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 104863
  --> https://bugs.freedesktop.org/attachment.cgi?id=104863&action=edit
dmesg

==System Environment==
--------------------------
Regression: No.
This case always fails.

Non-working platforms: BYT-M

==kernel==
--------------------------
origin/drm-intel-nightly: 09fcefee6357c6b3a30016adc0e306496172d6b7(fails)
    drm-intel-nightly: 2014y-08m-18d-16h-51m-59s integration manifest
origin/drm-intel-next-queued: ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1(fails)
    drm/i915/bdw: Enable Logical Ring Contexts (hence, Execlists)
origin/drm-intel-fixes: 1a125d8a2c22b11741fc47d4ffcf7a5ffa044dd3(fails)
    drm/i915: don't try to retrain a DP link on an inactive CRTC

==Bug detailed description==
-----------------------------
igt/kms_cursor_crc/cursor-size-change fails. This failure only occurs on one
BYT-M device.

Case list:
igt/kms_flip/vblank-vs-dpms-suspend
igt/kms_flip/vblank-vs-dpms-suspend-interruptible
igt/kms_flip/vblank-vs-modeset-suspend
igt/kms_flip/vblank-vs-modeset-suspend-interruptible
igt/kms_flip/vblank-vs-suspend
igt/kms_flip/vblank-vs-suspend-interruptible

Output:
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_cursor_crc
--run-subtest cursor-size-change
IGT-Version: 1.7-g5c7bcb1 (x86_64) (Linux:
3.16.0_drm-intel-nightly_186631_20140818+ x86_64)
Beginning cursor-size-change on pipe A, connector eDP-1
Test assertion failure function test_cursor_size, file kms_cursor_crc.c:394:
Failed assertion: igt_crc_equal(&crc[i], &ref_crc)
Subtest cursor-size-change: FAIL

Reference output:
root at x-byt06:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_cursor_crc
--run-subtest cursor-size-change
IGT-Version: 1.7-g1bec6cb (x86_64) (Linux:
3.17.0-rc1_drm-intel-nightly_09fcef_20140819+ x86_64)
Beginning cursor-size-change on pipe A, connector eDP-1
cursor-size-change on pipe A, connector eDP-1: PASSED
Beginning cursor-size-change on pipe B, connector eDP-1
cursor-size-change on pipe B, connector eDP-1: PASSED
Subtest cursor-size-change: SUCCESS

Reproduce steps:
-------------------------
1. ./kms_cursor_crc --run-subtest cursor-size-change

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