[Bug 96226] [IGT] [BXT-P/KBL] some pm_rpm / kms_flip subtests causes [i915]] *ERROR* CPU pipe B/C FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96226

--- Comment #6 from Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez at intel.com> ---
The following test also causes  [i915]] *ERROR* CPU pipe B/C FIFO underrun

test case : pm_rpm --run-subtest basic-pci-d3-state

test output
===================
IGT-Version: 1.15-g3ce58b6 (x86_64) (Linux:
4.7.0-rc2-drm-intel-nightly-ww24-commit-55d1291+ x86_64)
(pm_rpm:1965) drmtest-DEBUG: Test requirement passed: fd >= 0
(pm_rpm:1965) drmtest-DEBUG: Test requirement passed: fd >= 0
(pm_rpm:1965) drmtest-DEBUG: Test requirement passed: drmSetMaster(fd) == 0
(pm_rpm:1965) igt-kms-DEBUG: VT: graphics mode set (mode was 0x0)
(pm_rpm:1965) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080,
format=0x34325258, tiling=0x0, size=0)
(pm_rpm:1965) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=1, pitch=7680)
(pm_rpm:1965) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080,
format=0x34325258, tiling=0x0, size=0)
(pm_rpm:1965) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2, pitch=7680)
Runtime PM support: 1
PC8 residency support: 0
(pm_rpm:1965) DEBUG: Test requirement passed: has_runtime_pm
(pm_rpm:1965) igt-core-DEBUG: Starting subtest: basic-pci-d3-state
(pm_rpm:1965) DEBUG: Test requirement passed: has_runtime_pm
(pm_rpm:1965) igt-aux-CRITICAL: Test assertion failure function
igt_get_runtime_pm_status, file igt_aux.c:892:
(pm_rpm:1965) igt-aux-CRITICAL: Failed assertion: false
(pm_rpm:1965) igt-aux-CRITICAL: Unknown status error

Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [igt_get_runtime_pm_status+0x178]
  #2 [igt_wait_for_pm_status+0x66]
  #3 [main+0xa13]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest basic-pci-d3-state failed.
**** DEBUG ****
(pm_rpm:1965) DEBUG: Test requirement passed: has_runtime_pm
(pm_rpm:1965) igt-aux-CRITICAL: Test assertion failure function
igt_get_runtime_pm_status, file igt_aux.c:892:
(pm_rpm:1965) igt-aux-CRITICAL: Failed assertion: false
(pm_rpm:1965) igt-aux-CRITICAL: Unknown status error

****  END  ****
Subtest basic-pci-d3-state: FAIL (1.401s)
(pm_rpm:1965) igt-core-DEBUG: Exiting with status code 99
(pm_rpm:1965) igt-kms-DEBUG: VT: original mode 0x0 restored



graphic user space
====================
--> Component : drm 
         tag : libdrm-2.4.68 
         commit : fc09c5a 
--> Component : mesa 
         tag : mesa-11.2.2 
         commit : 3a9f628 
--> Component : cairo 
         tag : 1.15.2 
         commit : db8a7f1 
--> Component : intel-gpu-tools 
         tag : intel-gpu-tools-1.15 
         commit : 3ce58b6 

BXT-P
processor : B1

kernel
=====================
commit 55d12917bb98afe5de986673ce17c91063bd4ec9
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Jun 6 18:28:23 2016 +0200

    drm-intel-nightly: 2016y-06m-06d-16h-28m-05s UTC integration manifest


dmesg output
==================
kern  :err   : [Mon Jun  6 10:21:12 2016]
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO
underrun
kern  :err   : [Mon Jun  6 10:21:12 2016]
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
kern  :err   : [Mon Jun  6 10:21:12 2016] i915 0000:00:02.0: can't suspend
(intel_runtime_suspend [i915] returned -19)

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