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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@kms_* - dmesg-warn - WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105185#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@kms_* - dmesg-warn - WARNING: CPU: 4 PID: 1734 at drivers/gpu/drm/drm_vblank.c:614 drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105185">bug 105185</a>
from <span class="vcard"><a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> <span class="fn">Marta Löfstedt</span></a>
</span></b>
<pre>Now also on HSW:
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3874/shard-hsw8/igt@kms_chv_cursor_fail@pipe-c-128x128-left-edge.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3874/shard-hsw8/igt@kms_chv_cursor_fail@pipe-c-128x128-left-edge.html</a>
<7>[ 785.410971] [drm:intel_disable_pipe [i915]] disabling pipe C
<4>[ 785.411057] WARNING: CPU: 4 PID: 6891 at drivers/gpu/drm/drm_vblank.c:614
drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
<4>[ 785.411102] Modules linked in: vgem snd_hda_codec_hdmi i915
snd_hda_codec_realtek x86_pkg_temp_thermal snd_hda_codec_generic
intel_powerclamp coretemp snd_hda_intel snd_hda_codec crct10dif_pclmul
snd_hwdep crc32_pclmul snd_hda_core ghash_clmulni_intel snd_pcm r8169 mii
mei_me mei lpc_ich prime_numbers
<4>[ 785.411156] CPU: 4 PID: 6891 Comm: kms_chv_cursor_ Tainted: G U W
4.16.0-rc3-CI-CI_DRM_3874+ #1
<4>[ 785.411159] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12
02/15/2016
<4>[ 785.411164] RIP: 0010:drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
<4>[ 785.411167] RSP: 0018:ffff88041fb03d38 EFLAGS: 00010082
<4>[ 785.411172] RAX: ffffffffa0302b00 RBX: ffff880400480000 RCX:
0000000000000002
<4>[ 785.411174] RDX: ffffffff820e7f60 RSI: 0000000000000001 RDI:
ffffffff82068daa
<4>[ 785.411177] RBP: ffff88041fb03d98 R08: 0000000000000000 R09:
ffffffff815d2b70
<4>[ 785.411180] R10: 0000000000000000 R11: ffffffffa01bc470 R12:
0000000000000002
<4>[ 785.411182] R13: ffff8803fffed3d8 R14: ffff8803fffed908 R15:
0000000000000000
<4>[ 785.411186] FS: 00007f96b1825a40(0000) GS:ffff88041fb00000(0000)
knlGS:0000000000000000
<4>[ 785.411188] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 785.411191] CR2: 0000560918a7d9f8 CR3: 00000004071c6002 CR4:
00000000001606e0
<4>[ 785.411194] Call Trace:
<4>[ 785.411197] <IRQ>
<4>[ 785.411214] drm_get_last_vbltimestamp+0x36/0x50
<4>[ 785.411220] drm_update_vblank_count+0x64/0x240
<4>[ 785.411233] drm_crtc_accurate_vblank_count+0x41/0x90
<4>[ 785.411288] display_pipe_crc_irq_handler+0x176/0x220 [i915]
<4>[ 785.411353] hsw_pipe_crc_irq_handler+0x46/0x50 [i915]
<4>[ 785.411408] ironlake_irq_handler+0x8ac/0xa30 [i915]
<4>[ 785.411424] __handle_irq_event_percpu+0x3c/0x340
<4>[ 785.411436] handle_irq_event_percpu+0x1b/0x50
<4>[ 785.411443] handle_irq_event+0x2f/0x50
<4>[ 785.411450] handle_edge_irq+0xe4/0x1b0
<4>[ 785.411459] handle_irq+0x11/0x20
<4>[ 785.411464] do_IRQ+0x5e/0x120
<4>[ 785.411475] common_interrupt+0x84/0x84
<4>[ 785.411479] </IRQ>
<4>[ 785.411483] RIP: 0010:vprintk_emit+0x23b/0x4f0
<4>[ 785.411486] RSP: 0018:ffffc90000a7b990 EFLAGS: 00000246 ORIG_RAX:
ffffffffffffffdd
<4>[ 785.411491] RAX: ffff8804068b0040 RBX: 0000000000000007 RCX:
0000000000000006
<4>[ 785.411494] RDX: 0000000000001356 RSI: ffffffff8210fd11 RDI:
ffffffff820c03af
<4>[ 785.411496] RBP: ffffc90000a7b9e0 R08: ffff8804068b09e0 R09:
0000000088c83963
<4>[ 785.411499] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000246
<4>[ 785.411502] R13: 0000000000000000 R14: 0000000000000030 R15:
0000000000000000
<4>[ 785.411535] printk+0x3e/0x46
<4>[ 785.411613] ? intel_disable_pipe+0x3c/0x170 [i915]
<4>[ 785.411621] drm_printk+0x89/0x90
<4>[ 785.411632] ? trace_hardirqs_on_caller+0xde/0x1c0
<4>[ 785.411711] intel_disable_pipe+0x3c/0x170 [i915]
<4>[ 785.411789] haswell_crtc_disable+0x69/0x130 [i915]
<4>[ 785.411869] intel_atomic_commit_tail+0x1ec/0xd20 [i915]
<4>[ 785.411957] intel_atomic_commit+0x256/0x330 [i915]
<4>[ 785.411970] restore_fbdev_mode_atomic+0x199/0x1f0
<4>[ 785.411996] drm_fb_helper_restore_fbdev_mode_unlocked+0x42/0x90
<4>[ 785.412003] drm_fb_helper_set_par+0x24/0x50
<4>[ 785.412076] intel_fbdev_set_par+0x11/0x60 [i915]
<4>[ 785.412085] fbcon_init+0x594/0x620
<4>[ 785.412100] visual_init+0xca/0x120
<4>[ 785.412107] do_bind_con_driver+0x1bb/0x3a0
<4>[ 785.412123] store_bind+0x190/0x1b0
<4>[ 785.412134] kernfs_fop_write+0xfe/0x180
<4>[ 785.412146] __vfs_write+0x1e/0x130
<4>[ 785.412153] ? rcu_read_lock_sched_held+0x6f/0x80
<4>[ 785.412157] ? rcu_sync_lockdep_assert+0x25/0x50
<4>[ 785.412163] ? __sb_start_write+0xd9/0x1f0
<4>[ 785.412167] ? __sb_start_write+0xf3/0x1f0
<4>[ 785.412177] vfs_write+0xbd/0x1b0
<4>[ 785.412186] SyS_write+0x40/0xa0
<4>[ 785.412195] do_syscall_64+0x65/0x1a0
<4>[ 785.412204] entry_SYSCALL_64_after_hwframe+0x42/0xb7
<4>[ 785.412207] RIP: 0033:0x7f96afcfd670
<4>[ 785.412210] RSP: 002b:00007ffc1b47b188 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
<4>[ 785.412215] RAX: ffffffffffffffda RBX: 0000560918a759c0 RCX:
00007f96afcfd670
<4>[ 785.412217] RDX: 0000000000000002 RSI: 0000560917294540 RDI:
0000000000000008
<4>[ 785.412220] RBP: 0000000000000008 R08: 0000560918a75a33 R09:
0000000000000020
<4>[ 785.412223] R10: 0000000000000073 R11: 0000000000000246 R12:
000056091729455b
<4>[ 785.412225] R13: 0000560917294561 R14: 0000560917294546 R15:
0000560918a75a33
<4>[ 785.412247] Code: e1 48 c7 c2 60 7f 0e 82 be 01 00 00 00 48 c7 c7 aa 8d
06 82 e8 64 ec ff ff 48 8b 83 c8 07 00 00 48 83 78 28 00 0f 84 e2 fe ff ff <0f>
0b 45 31 ed e9 db fe ff ff 41 b8 d3 4d 62 10 89 c8 6a 03 41
<4>[ 785.412381] WARNING: CPU: 4 PID: 6891 at drivers/gpu/drm/drm_vblank.c:614
drm_calc_vbltimestamp_from_scanoutpos+0x13e/0x2f0
<4>[ 785.412384] ---[ end trace 1b9ccb6cf102d2a1 ]---</pre>
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