[Bug 81160] New: [BYT Regression]igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 3733 at drivers/gpu/drm/i915/intel_display.c:1231 __intel_set_mode+0xc59/0x1275 [i915]()"

Thu Jul 10 02:07:34 PDT 2014

https://bugs.freedesktop.org/show_bug.cgi?id=81160

          Priority: high
            Bug ID: 81160
          Keywords: bisect_pending
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BYT Regression]igt/kms_flip some subcases cause
                    "WARNING: CPU: 0 PID: 3733 at
                    drivers/gpu/drm/i915/intel_display.c:1231
                    __intel_set_mode+0xc59/0x1275 [i915]()"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 102526
  --> https://bugs.freedesktop.org/attachment.cgi?id=102526&action=edit
dmesg

==System Environment==
--------------------------
Regression: Yes. 
Good commit on -next-queued: 192155025197cc4765702a180904c3b62c152b7a

Non-working platforms: BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 16025dad8e9964a5810385f755d43f1c48d6fdcc(fails)
    drm-intel-nightly: 2014y-07m-09d-14h-17m-14s integration manifest
origin/drm-intel-next-queued: d101c8fe9bda6578ae72d6021415cfaad2b422f0(fails)
    drm/i915: remove i915_rstdby_delays debugfs entry
origin/drm-intel-fixes: 01527b3127997ef6370d5ad4fa25d96847fbf12a(works)
    drm/i915/vlv: T12 eDP panel timing enforcement during reboot

==Bug detailed description==
igt/kms_flip some subcases cause "WARNING: CPU: 0 PID: 3733 at
drivers/gpu/drm/i915/intel_display.c:1231 __intel_set_mode+0xc59/0x1275
[i915]()"

Case list:
igt/kms_flip/bcs-flip-vs-dpms
igt/kms_flip/bcs-flip-vs-dpms-interruptible
igt/kms_flip/bcs-wf_vblank-vs-dpms
igt/kms_flip/bcs-wf_vblank-vs-dpms-interruptible

Dmesg shows:
[  192.448191] WARNING: CPU: 0 PID: 3733 at
drivers/gpu/drm/i915/intel_display.c:1231 __intel_set_mode+0xc59/0x1275
[i915]()
[  192.448194] cursor on pipe B assertion failure (expected off, current on)
[  192.448196] 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 iTCO_wdt
iTCO_vendor_support snd_hda_intel serio_raw snd_hda_controller pcspkr
snd_hda_codec i2c_i801 lpc_ich mfd_core snd_hwdep snd_pcm snd_timer snd
soundcore iosf_mbi battery ac acpi_cpufreq joydev i915 video button
drm_kms_helper drm
[  192.448228] CPU: 0 PID: 3733 Comm: kms_flip Tainted: G        W    
3.16.0-rc4_drm-intel-nightly_16025d_20140710+ #378
[  192.448230]  0000000000000000 0000000000000009 ffffffff817803cd
ffff880002bafb38
[  192.448235]  ffffffff8103986c ffff880002bafb30 ffffffffa00b3da5
ffff880002830000
[  192.448239]  0000000000000000 ffff880002e06000 ffff880002fa1800
0000000000000001
[  192.448243] Call Trace:
[  192.448248]  [<ffffffff817803cd>] ? dump_stack+0x41/0x51
[  192.448253]  [<ffffffff8103986c>] ? warn_slowpath_common+0x78/0x90
[  192.448273]  [<ffffffffa00b3da5>] ? __intel_set_mode+0xc59/0x1275 [i915]
[  192.448278]  [<ffffffff8103991c>] ? warn_slowpath_fmt+0x45/0x4a
[  192.448300]  [<ffffffffa00b3da5>] ? __intel_set_mode+0xc59/0x1275 [i915]
[  192.448304]  [<ffffffff8177d3ac>] ? printk+0x4f/0x54
[  192.448315]  [<ffffffffa00073c0>] ? drm_ut_debug_printk+0x59/0x5e [drm]
[  192.448336]  [<ffffffffa00ba47a>] ? intel_set_mode+0xd/0x27 [i915]
[  192.448357]  [<ffffffffa00bb057>] ? intel_crtc_set_config+0x705/0xa5b [i915]
[  192.448362]  [<ffffffff81784451>] ? __ww_mutex_lock+0x15/0x8a
[  192.448374]  [<ffffffffa000beea>] ? drm_mode_set_config_internal+0x4b/0xb3
[drm]
[  192.448385]  [<ffffffffa000c13f>] ? drm_framebuffer_remove+0x72/0xf9 [drm]
[  192.448396]  [<ffffffffa000fa83>] ? drm_mode_rmfb+0xc3/0xec [drm]
[  192.448405]  [<ffffffffa0002f70>] ? drm_ioctl+0x27a/0x3c0 [drm]
[  192.448416]  [<ffffffffa000f9c0>] ? drm_mode_addfb2+0x2d/0x2d [drm]
[  192.448420]  [<ffffffff8100a810>] ? init_fpu+0x6f/0x83
[  192.448425]  [<ffffffff81104e0d>] ? kmem_cache_free+0xf7/0x135
[  192.448429]  [<ffffffff81119973>] ? do_vfs_ioctl+0x3ec/0x435
[  192.448434]  [<ffffffff81119a05>] ? SyS_ioctl+0x49/0x78
[  192.448438]  [<ffffffff8109f1b0>] ? __audit_syscall_exit+0x209/0x225
[  192.448443]  [<ffffffff81785f52>] ? system_call_fastpath+0x16/0x1b

==Reproduce steps==
---------------------------- 
1. ./gem_render_copy_redux

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