Bug 84074 - [BYT]igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 4384 at drivers/gpu/drm/i915/intel_display.c:1746 valleyview_crtc_enable+0x9e4/0xaee [i915]()"
Summary: [BYT]igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 4384 at drivers/g...
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-09-19 03:44 UTC by Guo Jinxian
Modified: 2015-03-03 03:02 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg (117.78 KB, text/plain)
2014-09-19 05:01 UTC, Guo Jinxian 		no flags Details
View All

Description Guo Jinxian 2014-09-19 03:44:49 UTC 
==System Environment==
--------------------------
Regression: No.
The failure only occurs on -nightly branch

Non-working platforms: BYT

==kernel==
--------------------------
origin/drm-intel-nightly:3d788a0e87efd99553d5b00a70ab2a162c2c2283(fails)
    drm-intel-nightly: 2014y-09m-18d-14h-51m-54s UTC integration manifest
origin/drm-intel-next-queued:f2a95be39ef661595379c23964710f0d760a2385(another bug 82446)
    drm/i915/vlv: Remove check for Old Ack during forcewake
origin/drm-intel-fixes: 8c875fca1a8d76665c60fa141c220cee65f44f5e(another bug 82800)
    drm/i915: Add limited color range readout for HDMI/DP ports on g4x/vlv/chv
origin/drm-fixes: 7dc9250f1d08f470f8d4e585a2eaeb951d4356be (another bug 82800)
    drm: sti: do not iterate over the info frame array
origin/drm-next: 8337486a8fda53e5f46b3cb2b4eb3272608348cb (another bug 82446)
    Merge branch 'drm/next/du' of git://linuxtv.org/pinchartl/fbdev into drm-next


==Bug detailed description==
-----------------------------
igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 4384 at drivers/gpu/drm/i915/intel_display.c:1746 valleyview_crtc_enable+0x9e4/0xaee [i915]()"

Case list:
igt/kms_flip/flip-vs-expired-vblank
igt/kms_flip/flip-vs-expired-vblank-interruptible

Output:
root@x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip --run-subtest flip-vs-expired-vblank   IGT-Version: 1.8-g5053446 (x86_64) (Linux: 3.17.0-rc5_drm-intel-nightly_3d788a_20140919+ x86_64)
Using monotonic timestamps
Beginning flip-vs-expired-vblank on crtc 8, connector 28
  1366x768 60 1366 1404 1426 1482 768 771 777 798 0xa 0x48 71000
...................................................................................................................................................................................................................................................................................................................................................................................................................................................................
flip-vs-expired-vblank on crtc 8, connector 28: PASSED

Beginning flip-vs-expired-vblank on crtc 13, connector 28
  1366x768 60 1366 1404 1426 1482 768 771 777 798 0xa 0x48 71000
..................................................................................Test assertion failure function run_test_step, file kms_flip.c:837:
Failed assertion: reply.sequence == exp_seq
Subtest flip-vs-expired-vblank: FAIL (22.266s)
root@x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep ""<[1-4]>""|grep drm
<3>[   96.203586] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
<4>[   97.254477] WARNING: CPU: 0 PID: 4384 at drivers/gpu/drm/i915/intel_display.c:1746 valleyview_crtc_enable+0x9e4/0xaee [i915]()
<4>[   97.254484] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support snd_hda_codec_conexant snd_hda_codec_generic pcspkr i2c_i801 r8169 lpc_ich mfd_core snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore iosf_mbi battery wmi ac acpi_cpufreq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev i915 button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea
<4>[   97.254525] CPU: 0 PID: 4384 Comm: kms_flip Not tainted 3.17.0-rc5_drm-intel-nightly_3d788a_20140919+ #2612
<4>[   97.254750]  [<ffffffffa0017fe5>] ? drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[   97.254764]  [<ffffffffa001ba0e>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[   97.254776]  [<ffffffffa001074c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[   97.254796]  [<ffffffffa001b628>] ? drm_mode_setplane+0x1ce/0x1ce [drm]
<3>[   98.512241] [drm:i9xx_set_fifo_underrun_reporting] *ERROR* pipe B underrun
<3>[   98.512251] [drm:valleyview_pipestat_irq_handler] *ERROR* pipe B underrun
<3>[  104.117081] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting


==Reproduce steps==
---------------------------- 
1. ./kms_flip --run-subtest flip-vs-expired-vblank
Comment 1 Guo Jinxian 2014-09-19 05:01:15 UTC 
Created attachment 106534 [details]
dmesg
Comment 2 Guo Jinxian 2014-09-19 05:15:26 UTC 
This failure is able to reproduce while running tests below:

igt/kms_flip/plain-flip
igt/kms_flip/wf_vblank-ts-check-interruptible


root@x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip --run-subtest wf_vblank-ts-check-interruptible
IGT-Version: 1.8-g5053446 (x86_64) (Linux: 3.17.0-rc5_drm-intel-nightly_3d788a_20140919+ x86_64)
Using monotonic timestamps
Beginning wf_vblank-ts-check-interruptible on crtc 8, connector 28
  1366x768 60 1366 1404 1426 1482 768 771 777 798 0xa 0x48 71000
..............................................
wf_vblank-ts-check-interruptible on crtc 8, connector 28: PASSED

Beginning wf_vblank-ts-check-interruptible on crtc 13, connector 28
  1366x768 60 1366 1404 1426 1482 768 771 777 798 0xa 0x48 71000
...Test assertion failure function check_state, file kms_flip.c:587:
Failed assertion: fabs((((double) diff.tv_usec) - usec_interflip) / usec_interflip) <= 0.005
Last errno: 4, Interrupted system call
inter-vblank ts jitter: 0s, 987044us
Subtest wf_vblank-ts-check-interruptible: FAIL (21.058s)
root@x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[  484.453171] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
<4>[  485.504061] WARNING: CPU: 1 PID: 4308 at drivers/gpu/drm/i915/intel_display.c:1746 valleyview_crtc_enable+0x9e4/0xaee [i915]()
<4>[  485.504068] Modules linked in: dm_mod snd_hda_codec_hdmi snd_hda_codec_conexant iTCO_wdt iTCO_vendor_support snd_hda_codec_generic snd_hda_intel snd_hda_controller pcspkr r8169 lpc_ich snd_hda_codec mfd_core snd_hwdep i2c_i801 snd_pcm snd_timer snd soundcore iosf_mbi battery wmi ac acpi_cpufreq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev i915 button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea
<4>[  485.504109] CPU: 1 PID: 4308 Comm: kms_flip Tainted: G        W      3.17.0-rc5_drm-intel-nightly_3d788a_20140919+ #2612
<4>[  485.504335]  [<ffffffffa0017fe5>] ? drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[  485.504349]  [<ffffffffa001ba0e>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[  485.504361]  [<ffffffffa001074c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[  485.504381]  [<ffffffffa001b628>] ? drm_mode_setplane+0x1ce/0x1ce [drm]
<3>[  486.857576] [drm:valleyview_pipestat_irq_handler] *ERROR* pipe B underrun
<3>[  492.413688] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
Comment 3 Guo Jinxian 2014-10-20 06:24:51 UTC 
The failure is able to reproduce on IVB while running tests below

igt/kms_flip/blocking-wf_vblank
igt/kms_flip/flip-vs-absolute-wf_vblank
igt/kms_flip/flip-vs-absolute-wf_vblank-interruptible
igt/kms_flip/flip-vs-blocking-wf-vblank
igt/kms_flip/flip-vs-wf_vblank
igt/kms_flip/flip-vs-wf_vblank-interruptible
igt/kms_flip/wf_vblank-ts-check
igt/kms_flip/wf_vblank-ts-check-interruptible



[root@x-ivb9 tests]# ./kms_flip --run-subtest wf_vblank-ts-check
IGT-Version: 1.8-gbba1cd0 (x86_64) (Linux: 3.17.0_drm-intel-nightly_8d1dbe_20141020_debug+ x86_64)
Using monotonic timestamps
Beginning wf_vblank-ts-check on crtc 8, connector 18
  1680x1050 60 1680 1784 1960 2240 1050 1053 1059 1089 0x6 0x48 146250
..Test assertion failure function check_state, file kms_flip.c:585:
Failed assertion: fabs((((double) diff.tv_usec) - usec_interflip) / usec_interflip) <= 0.005
inter-vblank ts jitter: 0s, 165943us
Subtest wf_vblank-ts-check: FAIL (1.462s)
Comment 4 Jesse Barnes 2015-03-02 21:27:25 UTC 
Do these problems still occur in current kernels?
Comment 5 Ding Heng 2015-03-03 03:01:57 UTC 
(In reply to Jesse Barnes from comment #4)
> Do these problems still occur in current kernels?

Warn never appear anymore, most of the cases passed, but subcase will still fail. I will open a new bug for this. Close this bug.

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