[Bug 78948] New: [BDW]igt/pm_rpm/system-suspend fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78948

          Priority: medium
            Bug ID: 78948
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW]igt/pm_rpm/system-suspend 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 99391
  --> https://bugs.freedesktop.org/attachment.cgi?id=99391&action=edit
dmesg

==System Environment==
--------------------------
Regression: No. 
It's new case

Non-working platforms: BDW

==kernel==
--------------------------
-nightly: 0791a325e382bfd2b06673655b90ed64682a519a(fails)
-queued: b6fdd0f2b990006daba19eec676b632faa523fc8(fails)
    Author: Shashank Sharma <shashank.sharma at intel.com>
    Date:   Mon May 19 20:54:03 2014 +0530

    drm/i915: Add MIPI mmio reg base

    This patch adds a mmio base address variable for DSI display,
    to make the DSI code generic, so that, if required, the same code
    can be re-used for future platforms with different mmio base.

    Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
    Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>
    [danvet: Appease checkpatch.]
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

-fixes: e95a2f7509f5219177d6821a0a8754f93892ca56 (works)
    Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Date:   Thu May 8 15:09:19 2014 +0300

    drm/i915: Increase WM memory latency values on SNB

    On SNB the BIOS provided WM memory latency values seem insufficient to
    handle high resolution displays.

    In this particular case the display mode was a 2560x1440 at 60Hz, which
    makes the pixel clock 241.5 MHz. It was empirically found that a memory
    latency value if 1.2 usec is enough to avoid underruns, whereas the BIOS
    provided value of 0.7 usec was clearly too low. Incidentally 1.2 usec
    is what the typical BIOS provided values are on IVB systems.

    Increase the WM memory latency values to at least 1.2 usec on SNB.
    Hopefully this won't have a significant effect on power consumption.

    v2: Increase the latency values regardless of the pixel clock

    Cc: Robert N <crshman at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70254
    Tested-by: Robert Navarro <crshman at gmail.com>
    Tested-by: Vitaly Minko <vitaly.minko at gmail.com>
    Cc: stable at vger.kernel.org
    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Signed-off-by: Jani Nikula <jani.nikula at intel.com>

==Bug detailed description==
-----------------------------
igt/pm_rpm/system-suspend fails

Output:
./pm_rpm --run-subtest system-suspend            IGT-Version: 1.6-gd71add5
(x86_64) (Linux: 3.15.0-rc3_drm-intel-next-queued_b6fdd0_20140520+ x86_64)
Runtime PM support: 1
PC8 residency support: 1
rtcwake: assuming RTC uses UTC ...
rtcwake: wakeup from ""mem"" using /dev/rtc0 at Tue May 20 18:28:22 2014
Test assertion failure function system_suspend_subtest, file pm_rpm.c:1390:
Last errno: 2, No such file or directory
Failed assertion: wait_for_suspended()
Subtest system-suspend: FAIL


==Reproduce steps==
---------------------------- 
1. ./pm_rpm --run-subtest system-suspend

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