<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT/BSW]WARNING:at drivers/gpu/drm/drm_irq.c:1058 drm_wait_one_vblank+0x32/0x157 after boot"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82490">82490</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BYT/BSW]WARNING:at drivers/gpu/drm/drm_irq.c:1058 drm_wait_one_vblank+0x32/0x157 after boot
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=104464" name="attach_104464" title="dmesg">attachment 104464</a> <a href="attachment.cgi?id=104464&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: No.
It's only happens on -nightly kernel
Non-working platforms: BYT/BSW
==kernel==
--------------------------
drm-intel-nightly/cf1dde8b87834496aabd0a534b1c0695a3572e8d
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Mon Aug 11 23:30:48 2014 +0200
drm-intel-nightly: 2014y-08m-11d-23h-30m-32s integration manifest
drm-intel-next-queued/14bf993e83e1d6924f4bf4506120a15c4b255e58
Author: Oscar Mateo <<a href="mailto:oscar.mateo@intel.com">oscar.mateo@intel.com</a>>
Date: Thu Jul 24 17:04:34 2014 +0100
drm/i915/bdw: Always use MMIO flips with Execlists
drm-intel-fixes/be71eabebaf9f142612d34d42292b454e984dcb5
commit be71eabebaf9f142612d34d42292b454e984dcb5
Author: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@intel.com">rodrigo.vivi@intel.com</a>>
Date: Mon Aug 4 11:15:19 2014 -0700
Revert "drm/i915: Enable semaphores on BDW"
This reverts commit 521e62e49a42661a4ee0102644517dbe2f100a23.
==Bug detailed description==
-----------------------------
Clean boot system, WARNING appears in dmesg, it happens on nightly kernel.
on -queued kernel, it has warning <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]"WARNING: CPU: 1 PID: 1234 at drivers/gpu/drm/i915/intel_dp.c:1184 intel_enable_dp+0x41/0x79 [i915]()" after boot"
href="show_bug.cgi?id=81697">Bug 81697</a> and <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BSW]CallTrace "WARNING: CPU: 0 PID: 1237 at drivers/gpu/drm/i915/intel_pm.c:5955 check_power_well_state+0x69/0x6f [i915]()" after boot"
href="show_bug.cgi?id=81202">Bug 81202</a>
dmesg:
[ 2.756314] WARNING: CPU: 2 PID: 1239 at drivers/gpu/drm/drm_irq.c:1058
drm_wait_one_vblank+0x32/0x157 [drm]()
[ 2.756320] Modules linked in: i915(+) button video drm_kms_helper drm
[ 2.756325] CPU: 2 PID: 1239 Comm: udevd Not tainted
3.16.0_drm-intel-nightly_cf1dde_20140812+ #1336
[ 2.756331] 0000000000000000 0000000000000009 ffffffff817809a2
0000000000000000
[ 2.756334] ffffffff8103987c ffff880002d60000 ffffffffa000585f
ffffffffa0111140
[ 2.756338] ffff880077a0c800 ffff880002d60000 0000000000000001
ffff880077a0c800
[ 2.756339] Call Trace:
[ 2.756348] [<ffffffff817809a2>] ? dump_stack+0x41/0x51
[ 2.756355] [<ffffffff8103987c>] ? warn_slowpath_common+0x78/0x90
[ 2.756366] [<ffffffffa000585f>] ? drm_wait_one_vblank+0x32/0x157 [drm]
[ 2.756377] [<ffffffffa000585f>] ? drm_wait_one_vblank+0x32/0x157 [drm]
[ 2.756382] [<ffffffff81785066>] ? mutex_lock+0x9/0x25
[ 2.756438] [<ffffffffa0079d26>] ? intel_display_power_put+0xec/0xfc [i915]
[ 2.756502] [<ffffffffa00bd292>] ? i9xx_crtc_disable+0x8c/0x3c3 [i915]
[ 2.756563] [<ffffffffa00b8cac>] ? __intel_set_mode+0xd19/0x121d [i915]
[ 2.756567] [<ffffffff8177d981>] ? printk+0x4f/0x54
[ 2.756629] [<ffffffffa00beffa>] ? intel_set_mode+0xd/0x27 [i915]
[ 2.756692] [<ffffffffa00bfc29>] ? intel_crtc_set_config+0x757/0xa99 [i915]
[ 2.756706] [<ffffffffa000c18b>] ? drm_mode_set_config_internal+0x48/0xbd
[drm]
[ 2.756713] [<ffffffffa0051ab1>] ? restore_fbdev_mode+0xa9/0xc2
[drm_kms_helper]
[ 2.756719] [<ffffffffa0051ae7>] ?
drm_fb_helper_restore_fbdev_mode_unlocked+0x1d/0x34 [drm_kms_helper]
[ 2.756725] [<ffffffff813b88f8>] ? con_set_default_unimap+0x136/0x14e
[ 2.756731] [<ffffffffa0052e21>] ? drm_fb_helper_set_par+0x3a/0x59
[drm_kms_helper]
[ 2.756792] [<ffffffffa00c8e60>] ? intel_fbdev_set_par+0x11/0x55 [i915]
[ 2.756797] [<ffffffff813657d9>] ? fbcon_init+0x2ff/0x408
[ 2.756802] [<ffffffff813b9391>] ? visual_init+0xaf/0x102
[ 2.756806] [<ffffffff813bab2e>] ? do_bind_con_driver+0x1a1/0x2ca
[ 2.756811] [<ffffffff813bad89>] ? do_take_over_console+0x132/0x162
[ 2.756814] [<ffffffff81364ec6>] ? do_fbcon_takeover+0x53/0x96
[ 2.756819] [<ffffffff81055765>] ? notifier_call_chain+0x2e/0x59
[ 2.756823] [<ffffffff810558a4>] ? __blocking_notifier_call_chain+0x43/0x5d
[ 2.756828] [<ffffffff8136ea90>] ? register_framebuffer+0x23f/0x29d
[ 2.756835] [<ffffffffa00524e0>] ? drm_fb_helper_initial_config+0x249/0x2eb
[drm_kms_helper]
[ 2.756902] [<ffffffffa00e7aac>] ? i915_driver_load+0xcc0/0xef1 [i915]
[ 2.756909] [<ffffffff8132a0b6>] ? idr_replace+0x2d/0x93
[ 2.756921] [<ffffffffa00075b1>] ? drm_dev_register+0x74/0xe6 [drm]
[ 2.756933] [<ffffffffa0009ab6>] ? drm_get_pci_dev+0xf4/0x1af [drm]
[ 2.756938] [<ffffffff8135145a>] ? local_pci_probe+0x36/0x7c
[ 2.756941] [<ffffffff8132a929>] ? ida_get_new_above+0x171/0x18b
[ 2.756945] [<ffffffff813516fe>] ? pci_device_probe+0xcc/0xf0
[ 2.756951] [<ffffffff813d8c4a>] ? driver_probe_device+0x9d/0x1d5
[ 2.756955] [<ffffffff813d8d82>] ? driver_probe_device+0x1d5/0x1d5
[ 2.756959] [<ffffffff813d8dd5>] ? __driver_attach+0x53/0x73
[ 2.756963] [<ffffffff813d7542>] ? bus_for_each_dev+0x4e/0x7f
[ 2.756967] [<ffffffff813d84f8>] ? bus_add_driver+0xe7/0x1cc
[ 2.756971] [<ffffffff813d941e>] ? driver_register+0x82/0xb5
[ 2.756974] [<ffffffffa0129000>] ? 0xffffffffa0128fff
[ 2.756979] [<ffffffff81000301>] ? do_one_initcall+0xe3/0x176
[ 2.756984] [<ffffffff810f604e>] ? __vunmap+0x8c/0xc4
[ 2.756989] [<ffffffff8108c105>] ? load_module+0x1821/0x1b04
[ 2.756994] [<ffffffff81089d25>] ? module_unload_free+0xca/0xca
[ 2.756999] [<ffffffff8108c478>] ? SyS_init_module+0x90/0x9b
[ 2.757003] [<ffffffff817864d2>] ? system_call_fastpath+0x16/0x1b
[ 2.757005] ---[ end trace bdf4b99dbf74b40b ]---
==Reproduce steps==
----------------------------
1. clean boot system</pre>
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