[Bug 89127] [SKL]igt/kms_flip fails and causes drivers/gpu/drm/i915/intel_display.c:3612 intel_crtc_wait_for_pending_flips+0xec/0x1ad [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89127

--- Comment #3 from lu hua <huax.lu at intel.com> ---
Created attachment 114181
  --> https://bugs.freedesktop.org/attachment.cgi?id=114181&action=edit
dmesg-update

Test on the latest -nightly kernel. It still has warning.
[   63.539320] ------------[ cut here ]------------
[   63.539367] WARNING: CPU: 2 PID: 0 at
drivers/gpu/drm/i915/intel_display.c:9826 intel_check_page_flip+0xa6/0xc1
[i915]()
[   63.539371] Kicking stuck page flip: queued at 1, now 5
[   63.539373] Modules linked in: dm_mod ppdev snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
snd_pcm pcspkr i2c_i801 snd_timer snd soundcore wmi battery parport_pc parport
ac acpi_cpufreq i915 button video drm_kms_helper drm
[   63.539402] CPU: 2 PID: 0 Comm: swapper/2 Not tainted
4.0.0-rc3_drm-intel-nightly_c09a3b_20150310+ #104
[   63.539405] Hardware name: Intel Corporation Skylake Client platform/Skylake
Y LPDDR3 RVP3, BIOS SKLSE2R1.86C.B069.R00.1501192136 01/19/2015
[   63.539408]  0000000000000000 0000000000000009 ffffffff81793a7f
ffff88014e483e18
[   63.539414]  ffffffff8103bcf8 ffff880148e479a0 ffffffffa00d12f1
0000000000000002
[   63.539418]  ffff880148e47800 ffff880004c2c000 0000000000000001
0000000000000001
[   63.539423] Call Trace:
[   63.539426]  <IRQ>  [<ffffffff81793a7f>] ? dump_stack+0x40/0x50
[   63.539443]  [<ffffffff8103bcf8>] ? warn_slowpath_common+0x98/0xb0
[   63.539469]  [<ffffffffa00d12f1>] ? intel_check_page_flip+0xa6/0xc1 [i915]
[   63.539476]  [<ffffffff8103bd55>] ? warn_slowpath_fmt+0x45/0x4a
[   63.539504]  [<ffffffffa00c1b6d>] ? __intel_pageflip_stall_check+0xaf/0xd8
[i915]
[   63.539529]  [<ffffffffa00d12f1>] ? intel_check_page_flip+0xa6/0xc1 [i915]
[   63.539557]  [<ffffffffa00a8e3a>] ? gen8_irq_handler+0x1fb/0x345 [i915]
[   63.539563]  [<ffffffff81071c70>] ? handle_irq_event_percpu+0x34/0x15b
[   63.539569]  [<ffffffff81081e69>] ? update_wall_time+0x524/0x53d
[   63.539573]  [<ffffffff81071dc5>] ? handle_irq_event+0x2e/0x4c
[   63.539578]  [<ffffffff8107430e>] ? handle_edge_irq+0xba/0xcf
[   63.539583]  [<ffffffff81004313>] ? handle_irq+0x15/0x1d
[   63.539588]  [<ffffffff81003dd7>] ? do_IRQ+0x41/0xc0
[   63.539593]  [<ffffffff81799daa>] ? common_interrupt+0x6a/0x6a
[   63.539595]  <EOI>  [<ffffffff816acead>] ? cpuidle_enter_state+0x71/0x11e
[   63.539608]  [<ffffffff816ace91>] ? cpuidle_enter_state+0x55/0x11e
[   63.539616]  [<ffffffff8106526b>] ? cpu_startup_entry+0x1f7/0x34d
[   63.539620] ---[ end trace 0d2c93c119121b88 ]---

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