[Bug 78687] New: [BYT]Subcases dpms-lpsp and dpms-non-lpsp of igt/pm_pc8 fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78687

          Priority: medium
            Bug ID: 78687
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT]Subcases dpms-lpsp and dpms-non-lpsp of
                    igt/pm_pc8 fail
        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

==System Environment==
--------------------------
Regression: No. 
These case were not support before

Non-working platforms: BYT

==kernel==
--------------------------
-nightly: 2be456541ea41728002ccca2de5235f48d14326e (fails)
-queued: 70e1e0ec02dfe93650fb2c70824dc81e3eb5b2cc (fails)
    Author: Damien Lespiau <damien.lespiau at intel.com>
    Date:   Tue May 13 23:32:24 2014 +0100

    drm/i915: Use for_each_crtc() when iterating through the CRTCs

    Patch done using the following semantic patch (thanks Daniel for the
    help!)

      @@
      iterator name list_for_each_entry;
      iterator name for_each_crtc;
      struct drm_crtc * crtc;
      struct drm_device * dev;
      @@
      -list_for_each_entry(crtc,&dev->mode_config.crtc_list, head) {
      +for_each_crtc(dev,crtc) {
        ...
      }

    Followed by a couple of fixups by hand (that spatch doesn't match the
    cases where list_for_each_entry() is not followed by a set of '{', '}',
    but I couldn't figure out a way to leave the '{' out of the iterator
    match).

    Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

-fixes: 05adaf1f101f25f40f12c29403e6488f0e45f6b6 (skips)
    Author: Jani Nikula <jani.nikula at intel.com>
    Date:   Fri May 9 14:52:34 2014 +0300

    drm/i915/vlv: reset VLV media force wake request register

    Media force wake get hangs the machine when the system is booted without
    displays attached. The assumption is that (at least some versions of)
    the firmware has skipped some initialization in that case.

    Empirical evidence suggests we need to reset the media force wake
    request register in addition to the render one to avoid hangs.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75895
    Reported-by: Imre Deak <imre.deak at intel.com>
    Reported-by: Darren Hart <dvhart at linux.intel.com>
    Tested-by: Darren Hart <dvhart at linux.intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
    Cc: stable at vger.kernel.org
    Signed-off-by: Jani Nikula <jani.nikula at intel.com>

==Bug detailed description==
-----------------------------
Subcases dpms-lpsp and dpms-non-lpsp of igt/pm_pc8 fail

Output:
./pm_pc8 --run-subtest dpms-non-lpsp
IGT-Version: 1.6-gd848a36 (x86_64) (Linux:
3.15.0-rc3_drm-intel-nightly_2be456_20140514+ x86_64)
Runtime PM support: 1
PC8 residency support: 0
Test assertion failure function modeset_subtest, file pm_pc8.c:846:
Last errno: 2, No such file or directory
Failed assertion: wait_for_suspended()
Subtest dpms-non-lpsp: FAIL

==Reproduce steps==
---------------------------- 
1. ./pm_pc8 --run-subtest dpms-non-lpsp

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