[Bug 81202] [BSW]CallTrace "WARNING: CPU: 0 PID: 1237 at drivers/gpu/drm/i915/intel_pm.c:5955 check_power_well_state+0x69/0x6f [i915]()" after boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81202

--- Comment #3 from Guo Jinxian <jinxianx.guo at intel.com> ---
The bug still able to reproduce on latest -nightly() while running test
igt/kms_setmode/clone-exclusive-crtc


Output:
[root at x-bsw01 tests]# ./kms_setmode --run-subtest clone-exclusive-crtc
IGT-Version: 1.7-ge48c495 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_eb2af9_20140730+ x86_64)
Testing: clone-exclusive-crtc 2 connector combinations
  Test id#1 CRTC count 2
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
  Test id#2 CRTC count 2
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
  Test id#3 CRTC count 2
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
  Test id#4 CRTC count 2
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
  Test id#5 CRTC count 2
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
  Test id#6 CRTC count 2
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
Testing: clone-exclusive-crtc 3 connector combinations
  Test id#7 CRTC count 3
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
  Test id#8 CRTC count 3
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[21] (NC)
    CRTC[7] [Pipe A] Mode: 640x480 at 60Hz Connectors: HDMI-A-2[28] (NC)
    CRTC[17] [Pipe C] Mode: 1920x1080 at 60Hz Connectors: HDMI-A-3[30]
Subtest clone-exclusive-crtc: SUCCESS
[root at x-bsw01 tests]# dmesg -r | egrep "<[1-4]>" |grep drm | less
<4>[  952.854840]  [<ffffffffa008cdde>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xbe/0x2eb [drm_kms_helper]
<4>[  952.854857]  [<ffffffffa004feb6>] ? drm_mode_getconnector+0xe4/0x2ff
[drm]
<4>[  952.854874]  [<ffffffffa004cb85>] ? drm_modeset_unlock_all+0x49/0x58
[drm]
<4>[  952.854889]  [<ffffffffa0043f70>] ? drm_ioctl+0x27a/0x3c0 [drm]
<4>[  952.854912]  [<ffffffffa004fdd2>] ? drm_mode_getcrtc+0xb3/0xb3 [drm]
<4>[  952.854982] WARNING: CPU: 0 PID: 4098 at
drivers/gpu/drm/i915/intel_pm.c:6429 check_power_well_state+0x69/0x6f [i915]()
<4>[  952.854989] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic serio_raw pcspkr
r8169 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm
snd_timer snd soundcore battery ac i915 button video drm_kms_helper drm option
usb_wwan usbserial
<4>[  952.855033] CPU: 0 PID: 4098 Comm: kms_setmode Tainted: G        W    
3.16.0-rc6_drm-intel-nightly_eb2af9_20140730+ #924
<4>[  952.855216]  [<ffffffffa008cdde>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xbe/0x2eb [drm_kms_helper]
<4>[  952.855234]  [<ffffffffa004feb6>] ? drm_mode_getconnector+0xe4/0x2ff
[drm]
<4>[  952.855251]  [<ffffffffa004cb85>] ? drm_modeset_unlock_all+0x49/0x58
[drm]
<4>[  952.855265]  [<ffffffffa0043f70>] ? drm_ioctl+0x27a/0x3c0 [drm]
<4>[  952.855289]  [<ffffffffa004fdd2>] ? drm_mode_getcrtc+0xb3/0xb3 [drm]
<4>[  952.858608] WARNING: CPU: 0 PID: 4098 at
drivers/gpu/drm/i915/intel_pm.c:6173 vlv_power_well_enabled+0x68/0x91 [i915]()
<4>[  952.858612] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic serio_raw pcspkr
r8169 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm
snd_timer snd soundcore battery ac i915 button video drm_kms_helper drm option
usb_wwan usbserial

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