[Bug 83759] [BSW]igt/kms_flip subcases cause "WARNING: CPU: 0 PID: 3785 at drivers/gpu/drm/i915/intel_display.c:3486 intel_crtc_wait_for_pending_flips+0xdd/0x197 [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83759

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|bisect_pending              |
           Priority|highest                     |medium
             Status|NEEDINFO                    |ASSIGNED
            Summary|[BSW Bisected]igt/kms_flip  |[BSW]igt/kms_flip subcases
                   |subcases cause "WARNING:    |cause "WARNING: CPU: 0 PID:
                   |CPU: 0 PID: 3785 at         |3785 at
                   |drivers/gpu/drm/i915/intel_ |drivers/gpu/drm/i915/intel_
                   |display.c:3486              |display.c:3486
                   |intel_crtc_wait_for_pending |intel_crtc_wait_for_pending
                   |_flips+0xdd/0x197 [i915]()" |_flips+0xdd/0x197 [i915]()"

--- Comment #7 from Guo Jinxian <jinxianx.guo at intel.com> ---
I checked the parents commit of the bad commit a bisected. It is skips

On commit 1180e20606fd7c5d76dc5b2a1594fa51ba5a0f31, the result is skips
root at x-bsw03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest bcs-flip-vs-panning
IGT-Version: 1.7-g5c7bcb1 (x86_64) (Linux: 3.17.0-rc5_glody_1180e2_20141110+
x86_64)
Using monotonic timestamps
Test requirement not met in function run_test, file kms_flip.c:1399:
Test requirement: modes
Subtest bcs-flip-vs-panning: SKIP

The bad commit is passed and have dmesg warning.

On commit e17ac6db2ef99388b750b2141c11974dc5742913, the result is dmesg
warning.
root at x-bsw03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest bcs-flip-vs-panning
IGT-Version: 1.7-g5c7bcb1 (x86_64) (Linux: 3.17.0-rc5_glody_e17ac6_20141110+
x86_64)
Using monotonic timestamps
Beginning bcs-flip-vs-panning on crtc 8, connector 29
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
..
bcs-flip-vs-panning on crtc 8, connector 29: PASSED

Beginning bcs-flip-vs-panning on crtc 13, connector 29
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
..

bcs-flip-vs-panning on crtc 13, connector 29: PASSED

Subtest bcs-flip-vs-panning: SUCCESS
root at x-bsw03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
"<[1-4]>"|grep drm
<4>[  115.100962] WARNING: CPU: 1 PID: 4303 at
drivers/gpu/drm/i915/intel_display.c:3473
intel_crtc_wait_for_pending_flips+0xd2/0x188 [i915]()
<4>[  115.100966] Modules linked in: ipv6 dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller
serio_raw pcspkr snd_hda_codec snd_hwdep snd_pcm i2c_i801 r8169 snd_timer snd
soundcore battery ac acpi_cpufreq option usb_wwan usbserial i915 button video
drm_kms_helper drm
<4>[  115.101190]  [<ffffffffa000bd74>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[  115.101208]  [<ffffffffa000f466>] ? drm_mode_setcrtc+0x388/0x47e [drm]
<4>[  115.101225]  [<ffffffffa0004749>] ? drm_ioctl+0x344/0x3b3 [drm]
<4>[  115.101242]  [<ffffffffa000f0de>] ? drm_mode_setplane+0x16b/0x16b [drm]
<4>[  115.101316] WARNING: CPU: 1 PID: 4303 at
drivers/gpu/drm/i915/intel_display.c:3479
intel_crtc_wait_for_pending_flips+0x10a/0x188 [i915]()
<4>[  115.101322] Modules linked in: ipv6 dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller
serio_raw pcspkr snd_hda_codec snd_hwdep snd_pcm i2c_i801 r8169 snd_timer snd
soundcore battery ac acpi_cpufreq option usb_wwan usbserial i915 button video
drm_kms_helper drm
<4>[  115.101575]  [<ffffffffa000bd74>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[  115.101593]  [<ffffffffa000f466>] ? drm_mode_setcrtc+0x388/0x47e [drm]
<4>[  115.101609]  [<ffffffffa0004749>] ? drm_ioctl+0x344/0x3b3 [drm]
<4>[  115.101626]  [<ffffffffa000f0de>] ? drm_mode_setplane+0x16b/0x16b [drm]
<4>[  177.806725] WARNING: CPU: 1 PID: 4303 at
drivers/gpu/drm/i915/intel_display.c:3473
intel_crtc_wait_for_pending_flips+0xd2/0x188 [i915]()
<4>[  177.806729] Modules linked in: ipv6 dm_mod snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller
serio_raw pcspkr snd_hda_codec snd_hwdep snd_pcm i2c_i801 r8169 snd_timer snd
soundcore battery ac acpi_cpufreq option usb_wwan usbserial i915 button video
drm_kms_helper drm
<4>[  177.806954]  [<ffffffffa000bd74>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[  177.806972]  [<ffffffffa000f466>] ? drm_mode_setcrtc+0x388/0x47e [drm]
<4>[  177.806989]  [<ffffffffa0004749>] ? drm_ioctl+0x344/0x3b3 [drm]
<4>[  177.807006]  [<ffffffffa000f0de>] ? drm_mode_setplane+0x16b/0x16b [drm]

I tried to find good commit on the front of skip commit, and found that the
result all skipps. Maybe this issue isn't a regression issue.

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