[Bug 80123] [HSW Bisected]igt/drv_suspend and kms_flip causes " WARNING: CPU: 5 PID: 4253 at drivers/gpu/drm/i915/intel_display.c:7305 hsw_enable_pc8+0xeb/0x54d [i915]()" sporadically

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80123

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[HSW                        |[HSW
                   |Regression]igt/kms_flip     |Bisected]igt/drv_suspend
                   |causes " WARNING: CPU: 5    |and kms_flip causes "
                   |PID: 4253 at                |WARNING: CPU: 5 PID: 4253
                   |drivers/gpu/drm/i915/intel_ |at
                   |display.c:7305              |drivers/gpu/drm/i915/intel_
                   |hsw_enable_pc8+0xeb/0x54d   |display.c:7305
                   |[i915]()" sporadically      |hsw_enable_pc8+0xeb/0x54d
                   |                            |[i915]()" sporadically
           Keywords|bisect_pending              |

--- Comment #1 from lu hua <huax.lu at intel.com> ---
drv_suspend subcases also have this warning with same bisect commit.
Bisect shows 85e90679335f56d162f4a0ff525573818e17ce44 is the first bad commit.
commit 85e90679335f56d162f4a0ff525573818e17ce44
Author:     Kristen Carlson Accardi <kristen at linux.intel.com>
AuthorDate: Thu Jun 12 08:35:44 2014 -0700
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Thu Jun 12 17:46:59 2014 +0200

    drm/i915: disable power wells on suspend

    We want to make sure everything is disabled and at its lowest power when
    freezing.

    Reviewed-by: Imre Deak <imre.deak at intel.com>
    Signed-off-by: Kristen Carlson Accardi <kristen at linux.intel.com>
    Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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