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

[bugzilla-daemon at freedesktop.org]

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

            Bug ID: 96226
           Summary: [IGT] [BXT-P] some pm_rpm subtests causes [i915]]
                    *ERROR* CPU pipe B/C FIFO underrun
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: humberto.i.perez.rodriguez at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 124110
  --> https://bugs.freedesktop.org/attachment.cgi?id=124110&action=edit
dmesg

Bug description
===============================================
some pm_rpm subtests causes [i915]] *ERROR* CPU pipe B/C FIFO underrun

Tests cases
===============================================
igt at pm_rpm@gem-pread
igt at pm_rpm@modeset-lpsp-stress
igt at pm_rpm@cursor
igt at pm_rpm@reg-read-ioctl
igt at pm_rpm@gem-mmap-cpu
igt at pm_rpm@modeset-non-lpsp-stress
igt at pm_rpm@sysfs-read
igt at pm_rpm@modeset-stress-extra-wait
igt at pm_rpm@universal-planes
igt at pm_rpm@legacy-planes-dpms
igt at pm_rpm@i2c
igt at pm_rpm@gem-evict-pwrite
igt at pm_rpm@pm-tiling
igt at pm_rpm@universal-planes-dpms
igt at pm_rpm@gem-execbuf
igt at pm_rpm@legacy-planes
igt at pm_rpm@gem-execbuf-stress
igt at pm_rpm@modeset-non-lpsp
igt at pm_rpm@dpms-mode-unset-lpsp
igt at pm_rpm@fences
igt at pm_rpm@gem-mmap-gtt
igt at pm_rpm@system-suspend
igt at pm_rpm@pm-caching
igt at pm_rpm@fences-dpms
igt at pm_rpm@system-suspend-execbuf
igt at pm_rpm@cursor-dpms
igt at pm_rpm@dpms-mode-unset-non-lpsp
igt at pm_rpm@gem-idle
igt at pm_rpm@modeset-lpsp

test output 
===============================================
IGT-Version: 1.14-gb88bce4 (x86_64) (Linux:
4.6.0-rc7-drm-intel-nightly-ww20-commit-5528ede+ x86_64)
(pm_rpm:1586) drmtest-DEBUG: Test requirement passed: fd >= 0
(pm_rpm:1586) drmtest-DEBUG: Test requirement passed: fd >= 0
(pm_rpm:1586) drmtest-DEBUG: Test requirement passed: drmSetMaster(fd) == 0
(pm_rpm:1586) igt-kms-DEBUG: VT: graphics mode set (mode was 0x0)
(pm_rpm:1586) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080,
format=0x34325258, tiling=0x0, size=0)
(pm_rpm:1586) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=1, pitch=7680)
(pm_rpm:1586) igt-fb-DEBUG: igt_create_fb_with_bo_size(width=1920, height=1080,
format=0x34325258, tiling=0x0, size=0)
(pm_rpm:1586) igt-fb-DEBUG: igt_create_fb_with_bo_size(handle=2, pitch=7680)
Runtime PM support: 1
PC8 residency support: 0
(pm_rpm:1586) DEBUG: Test requirement passed: has_runtime_pm
(pm_rpm:1586) igt-core-DEBUG: Starting subtest: gem-pread
(pm_rpm:1586) DEBUG: Test requirement passed: enable_one_screen_with_type(data,
SCREEN_TYPE_ANY)
(pm_rpm:1586) CRITICAL: Test assertion failure function gem_pread_subtest, file
pm_rpm.c:1045:
(pm_rpm:1586) CRITICAL: Failed assertion: wait_for_suspended()
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [main+0x21c1]
  #2 [__libc_start_main+0xf0]
  #3 [_start+0x29]
  #4 [<unknown>+0x29]
Subtest gem-pread failed.
**** DEBUG ****
(pm_rpm:1586) DEBUG: Test requirement passed: enable_one_screen_with_type(data,
SCREEN_TYPE_ANY)
(pm_rpm:1586) CRITICAL: Test assertion failure function gem_pread_subtest, file
pm_rpm.c:1045:
(pm_rpm:1586) CRITICAL: Failed assertion: wait_for_suspended()
****  END  ****
Subtest gem-pread: FAIL (10.702s)
(pm_rpm:1586) igt-core-DEBUG: Exiting with status code 99
(pm_rpm:1586) igt-kms-DEBUG: VT: original mode 0x0 restored

Expected result
===============================================
subtests must pass

Actual result 
===============================================
those subtests fail

Attachments
===============================================
dmesg

Gfx stack information
===============================================
 --> Component : drm 
         tag : libdrm-2.4.68-4-g7aab852 
         commit : 7aab852 
 --> Component : mesa 
         tag : mesa-11.1.2 
         commit : 7bcd827 
 --> Component : cairo 
         tag : 1.15.2 
         commit : db8a7f1 
 --> Component : intel-gpu-tools
         tag : intel-gpu-tools-1.14-346-gcce2ff0
         commit : cce2ff0


Software information
===============================================
Kernel version                      :
4.6.0-rc7-drm-intel-nightly-ww20-commit-5528ede+
Linux distribution                  : Ubuntu 15.10
Architecture                        : 64-bit
Bios revision                       : 138.22
KSC revision                        : 1.12
DMC revision                        : 1.07
GUC revision                        : 8.7


Hardware information
===============================================
Platform                            : BXT-P
Motherboard model                   : Broxton P
Motherboard type                    : NOTEBOOK Hand Held
Motherboard manufacturer            : Intel Corp.
CPU family                          : B1
CPU information                     : 06/5c
GPU Card                            : Intel Corporation Device 5a84 (rev 0a)
(prog-if 00 [VGA controller])


kernel
===============================================
commit 2ec823981d62c56d1511bda42b8295e31ece800f
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Sun May 22 18:23:13 2016 +0200

    drm-intel-nightly: 2016y-05m-22d-16h-22m-45s UTC integration manifest

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