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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][ELK] Warning in drm_calc_vbltimestamp_from_scanoutpos caught in CI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101002">101002</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BAT][ELK] Warning in drm_calc_vbltimestamp_from_scanoutpos caught in CI
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin.peres@free.fr
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>When running igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b on CI_DRM_2604, the
machine fi-elk-e7500 generated the following warning:
[ 389.934004] ------------[ cut here ]------------
[ 389.934004] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/drm_irq.c:780
drm_calc_vbltimestamp_from_scanoutpos+0x16e/0x310
[ 389.934004] Modules linked in: vgem i915 snd_hda_codec_realtek
snd_hda_codec_generic coretemp snd_hda_intel snd_hda_codec snd_hwdep
snd_hda_core snd_pcm lpc_ich e1000e ptp prime_numbers mei_me pps_core mei
[ 389.934004] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G U W
4.11.0-CI-CI_DRM_2604+ #1
[ 389.934004] Hardware name: Hewlett-Packard HP Compaq 8000 Elite CMT
PC/3647h, BIOS 786G7 v01.02 10/22/2009
[ 389.934004] Call Trace:
[ 389.934004] <IRQ>
[ 389.934004] dump_stack+0x67/0x92
[ 389.934004] __warn+0xc6/0xe0
[ 389.934004] warn_slowpath_null+0x18/0x20
[ 389.934004] drm_calc_vbltimestamp_from_scanoutpos+0x16e/0x310
[ 389.934004] ? gen2_read32+0x73/0x200 [i915]
[ 389.934004] drm_get_last_vbltimestamp+0x3a/0x60
[ 389.934004] drm_update_vblank_count+0x62/0x290
[ 389.934004] drm_accurate_vblank_count+0x3f/0x80
[ 389.934004] display_pipe_crc_irq_handler+0x16d/0x210 [i915]
[ 389.934004] i9xx_pipe_crc_irq_handler+0xda/0x160 [i915]
[ 389.934004] i965_irq_handler+0x20a/0x2f0 [i915]
[ 389.934004] __handle_irq_event_percpu+0x58/0x370
[ 389.934004] handle_irq_event_percpu+0x1e/0x50
[ 389.934004] handle_irq_event+0x34/0x60
[ 389.934004] handle_edge_irq+0xbe/0x150
[ 389.934004] handle_irq+0x15/0x20
[ 389.934004] do_IRQ+0x63/0x130
[ 389.934004] common_interrupt+0x90/0x90
[ 389.934004] RIP: 0010:cpuidle_enter_state+0x135/0x380
[ 389.934004] RSP: 0018:ffffffff81e03de8 EFLAGS: 00000246 ORIG_RAX:
ffffffffffffffac
[ 389.934004] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
[ 389.934004] RDX: 0000005ac9dfc3da RSI: ffffffff81c7891d RDI:
ffffffff81706b31
[ 389.934004] RBP: ffffffff81e03e20 R08: ffff88011bc170c4 R09:
0000000000000007
[ 389.934004] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000001
[ 389.934004] R13: ffff8801151dda88 R14: ffffffff81ec9f58 R15:
0000005ac9dfc3da
[ 389.934004] </IRQ>
[ 389.934004] ? cpuidle_enter_state+0x131/0x380
[ 389.934004] ? cpuidle_enter_state+0x131/0x380
[ 389.934004] cpuidle_enter+0x12/0x20
[ 389.934004] call_cpuidle+0x1e/0x40
[ 389.934004] do_idle+0x17e/0x1f0
[ 389.934004] cpu_startup_entry+0x18/0x20
[ 389.934004] rest_init+0x127/0x130
[ 389.934004] start_kernel+0x3f1/0x3fe
[ 389.934004] x86_64_start_reservations+0x2a/0x2c
[ 389.934004] x86_64_start_kernel+0x173/0x186
[ 389.934004] start_cpu+0x14/0x14
[ 389.934004] ? start_cpu+0x14/0x14
[ 389.934004] ---[ end trace 10eb07f9d4184c48 ]---
Full logs:
<a href="https://intel-gfx-ci.01.org/CI/CI_DRM_2604/fi-elk-e7500/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b.html">https://intel-gfx-ci.01.org/CI/CI_DRM_2604/fi-elk-e7500/igt@kms_pipe_crc_basic@nonblocking-crc-pipe-b.html</a></pre>
</div>
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