[Bug 90446] New: [BDW Regression]igt/pm_rpm/dpms-lpsp causes WARNING: CPU: 0 PID: 4951 at drivers/gpu/drm/i915/intel_display.c:1357 hsw_disable_ips+0x34/0x162

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90446

            Bug ID: 90446
           Summary: [BDW Regression]igt/pm_rpm/dpms-lpsp causes WARNING:
                    CPU: 0 PID: 4951 at
                    drivers/gpu/drm/i915/intel_display.c:1357
                    hsw_disable_ips+0x34/0x162
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 115762
  --> https://bugs.freedesktop.org/attachment.cgi?id=115762&action=edit
dmesg

==System Environment==
--------------------------
Regression: yes

good commit: dcdaab3ad1518eaf1ce31fd56d010c69a0754e06
bad commit:  65de797816eadb227c45b0127d7ff92410fa3814

Non-working platforms: BDW

==kernel==
--------------------------
drm-intel-nightly/6cf0fff478fa64991c2b7f2a44f2815d7a43a0b5
commit 6cf0fff478fa64991c2b7f2a44f2815d7a43a0b5
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed May 13 11:29:25 2015 +0200

    drm-intel-nightly: 2015y-05m-13d-09h-28m-49s UTC integration manifest

==Bug detailed description==
-----------------------------
It causes warning on drm-intel-nightly and drm-intel-next-queued kernel.
WARNING: CPU: 0 PID: 4951 at drivers/gpu/drm/i915/intel_display.c:1357
hsw_disable_ips+0x34/0x162 [i915]()

IGT-Version: 1.10-g9b0a32d (x86_64) (Linux:
4.1.0-rc3_drm-intel-nightly_6cf0ff_20150514+ x86_64)
Runtime PM support: 1
PC8 residency support: 1
Subtest dpms-lpsp: SUCCESS (1.126s)

[   35.555749] ------------[ cut here ]------------
[   35.555784] WARNING: CPU: 0 PID: 4951 at
drivers/gpu/drm/i915/intel_display.c:1357 hsw_disable_ips+0x34/0x162 [i915]()
[   35.555787] plane A assertion failure (expected on, current off)
[   35.555789] Modules linked in: ipv6 dm_mod iTCO_wdt iTCO_vendor_support
ppdev snd_hda_codec_hdmi snd_hda_intel snd_hda_codec pcspkr snd_hda_core
snd_hwdep i2c_i801 snd_pcm lpc_ich snd_timer mfd_core snd soundcore battery
parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
[   35.555814] CPU: 0 PID: 4951 Comm: pm_rpm Tainted: G        W      
4.1.0-rc3_drm-intel-nightly_6cf0ff_20150514+ #230
[   35.555817]  0000000000000000 0000000000000009 ffffffff817a67ac
ffff8800a29c7b78
[   35.555822]  ffffffff8103ebde ffff880144447c00 ffffffffa00d4e89
0000000000000000
[   35.555826]  ffff880002c70000 ffff88014953a000 ffff8800a7ebe000
0000000000000000
[   35.555830] Call Trace:
[   35.555838]  [<ffffffff817a67ac>] ? dump_stack+0x40/0x50
[   35.555842]  [<ffffffff8103ebde>] ? warn_slowpath_common+0x98/0xb0
[   35.555864]  [<ffffffffa00d4e89>] ? hsw_disable_ips+0x34/0x162 [i915]
[   35.555868]  [<ffffffff8103ec3b>] ? warn_slowpath_fmt+0x45/0x4a
[   35.555888]  [<ffffffffa00d4e89>] ? hsw_disable_ips+0x34/0x162 [i915]
[   35.555908]  [<ffffffffa00d5051>] ? intel_crtc_disable_planes+0x22/0xce
[i915]
[   35.555927]  [<ffffffffa00d5a1e>] ? __intel_set_mode+0x41c/0x94d [i915]
[   35.555948]  [<ffffffffa00db225>] ? intel_crtc_set_config+0x3f2/0x53d [i915]
[   35.555964]  [<ffffffffa000c326>] ? drm_mode_set_config_internal+0x4e/0xd2
[drm]
[   35.555978]  [<ffffffffa0010185>] ? drm_mode_setcrtc+0x3fe/0x4f4 [drm]
[   35.555989]  [<ffffffffa0004636>] ? drm_ioctl+0x322/0x38d [drm]
[   35.555993]  [<ffffffff8116e640>] ? kernfs_seq_start+0x24/0x7a
[   35.556005]  [<ffffffffa000fd87>] ? drm_mode_setplane+0x178/0x178 [drm]
[   35.556010]  [<ffffffff81123546>] ? do_vfs_ioctl+0x360/0x424
[   35.556015]  [<ffffffff81114c30>] ? vfs_read+0xd2/0x110
[   35.556018]  [<ffffffff81123653>] ? SyS_ioctl+0x49/0x7a
[   35.556022]  [<ffffffff817ac317>] ? system_call_fastpath+0x12/0x6a
[   35.556026] ---[ end trace e5520cc839db9848 ]---
[   35.556031] ------------[ cut here ]------------

==Reproduce steps==
---------------------------- 
1.  ./pm_rpm --run-subtest dpms-lpsp

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