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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 - [BDW]Dpy_3p_media causes WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/i915/intel_uncore.c:558 hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90036">90036</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]Dpy_3p_media causes WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/i915/intel_uncore.c:558 hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]()
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>yex.tian@intel.com
</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>==System Environment==
-----------------------------------------------------
Regression: not sure
Non-working platforms: BDW
==Kernel==
--------------------------------------------------
commit ccb80acf8645c77a7542446d7223b3fef996213d
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Fri Apr 10 08:58:01 2015 +0200
drm-intel-nightly: 2015y-04m-10d-06h-57m-17s UTC integration manifest
==Bug detailed description==
-----------------------------
Dpy_3p_media causes WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:558
hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]() on bdw.
It also causes WARNING on drm-intel-testing-2015-03-27 and
drm-intel-testing-2015-03-13.
It causes “[drm:hsw_unclaimed_reg_detect.isra.9 [i915]] *ERROR* Unclaimed
register detected. Please use the i915.mmio_debug=1 to debug this problem” on
drm-intel-testing-2015-02-27 and drm-intel-testing-2015-01-30.
Please see the dmesg 04-10 and 02-27 info.
Output:
<4>[ 326.955609] ------------[ cut here ]------------
<4>[ 326.955634] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:558
hsw_unclaimed_reg_debug.isra.8+0x62/0x78
[i915]()
<4>[ 326.955635] Unclaimed register detected before reading register 0x44200
<4>[ 326.955637] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi pcspkr i2c_i801
snd_hda_intel snd_hda_controller snd_hda_codec snd_hda_core lpc_ich mfd_core
snd_hwdep snd_pcm snd_timer snd soundcore
battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
<4>[ 326.955655] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
4.0.0-rc7_drm-intel-testing-2015-04-10+ #1074
<4>[ 326.955656] 0000000000000000 0000000000000009 ffffffff817958c7
ffff88014ec03dc8
<4>[ 326.955659] ffffffff8103bd5a 00000000004e0008 ffffffffa00becd6
ffffffff819a3970
<4>[ 326.955661] ffff880002f50068 0000000000044200 ffff880002f50070
ffff880002f50068
<4>[ 326.955663] Call Trace:
<4>[ 326.955664] <IRQ> [<ffffffff817958c7>] ? dump_stack+0x40/0x50
<4>[ 326.955673] [<ffffffff8103bd5a>] ? warn_slowpath_common+0x98/0xb0
<4>[ 326.955685] [<ffffffffa00becd6>] ?
hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]
<4>[ 326.955688] [<ffffffff8103bdb7>] ? warn_slowpath_fmt+0x45/0x4a
<4>[ 326.955692] [<ffffffff8105caac>] ? select_task_rq_fair+0x231/0x59d
<4>[ 326.955703] [<ffffffffa00becd6>] ?
hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]
<4>[ 326.955714] [<ffffffffa00bee97>] ? gen6_read32+0x49/0x163 [i915]
<4>[ 326.955727] [<ffffffffa00ad0e1>] ? gen8_irq_handler+0x4b/0x345 [i915]
<4>[ 326.955730] [<ffffffff81071db0>] ? handle_irq_event_percpu+0x34/0x15b
<4>[ 326.955733] [<ffffffff81081fb9>] ? update_wall_time+0x524/0x53d
<4>[ 326.955735] [<ffffffff81071f05>] ? handle_irq_event+0x2e/0x4d
<4>[ 326.955737] [<ffffffff81074450>] ? handle_edge_irq+0xba/0xcf
<4>[ 326.955740] [<ffffffff810042fd>] ? handle_irq+0x15/0x20
<4>[ 326.955742] [<ffffffff81003dc0>] ? do_IRQ+0x41/0xc0
<4>[ 326.955744] [<ffffffff8179bc2a>] ? common_interrupt+0x6a/0x6a
<4>[ 326.955746] <EOI> [<ffffffff8100a00f>] ? default_idle+0x1d/0x8a
<4>[ 326.955751] [<ffffffff8106547f>] ? cpu_startup_entry+0x2c3/0x350
<4>[ 326.955754] [<ffffffff81c82e35>] ? start_kernel+0x415/0x420
<4>[ 326.955757] [<ffffffff81c8282a>] ? set_init_arg+0x4e/0x4e
<4>[ 326.955758] ---[ end trace 9f6f9f66a9184c4c ]---
Reproduce steps:
----------------------------
1, xinit&
2, mplayer -vo xv xxxxx</pre>
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