[Bug 84074] [BYT]igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 4384 at drivers/gpu/drm/i915/intel_display.c:1746 valleyview_crtc_enable+0x9e4/0xaee [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84074

--- Comment #3 from Guo Jinxian <jinxianx.guo at intel.com> ---
The failure is able to reproduce on IVB while running tests below

igt/kms_flip/blocking-wf_vblank
igt/kms_flip/flip-vs-absolute-wf_vblank
igt/kms_flip/flip-vs-absolute-wf_vblank-interruptible
igt/kms_flip/flip-vs-blocking-wf-vblank
igt/kms_flip/flip-vs-wf_vblank
igt/kms_flip/flip-vs-wf_vblank-interruptible
igt/kms_flip/wf_vblank-ts-check
igt/kms_flip/wf_vblank-ts-check-interruptible



[root at x-ivb9 tests]# ./kms_flip --run-subtest wf_vblank-ts-check
IGT-Version: 1.8-gbba1cd0 (x86_64) (Linux:
3.17.0_drm-intel-nightly_8d1dbe_20141020_debug+ x86_64)
Using monotonic timestamps
Beginning wf_vblank-ts-check on crtc 8, connector 18
  1680x1050 60 1680 1784 1960 2240 1050 1053 1059 1089 0x6 0x48 146250
..Test assertion failure function check_state, file kms_flip.c:585:
Failed assertion: fabs((((double) diff.tv_usec) - usec_interflip) /
usec_interflip) <= 0.005
inter-vblank ts jitter: 0s, 165943us
Subtest wf_vblank-ts-check: FAIL (1.462s)

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20141020/8c52549a/attachment-0001.html>