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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT BYT] WARNING "Unclaimed register detected before reading register 0x186500""
href="https://bugs.freedesktop.org/show_bug.cgi?id=93698">93698</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BAT BYT] WARNING "Unclaimed register detected before reading register 0x186500"
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg 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>daniel@ffwll.ch
</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>This happens while running igt@kms_flip@basic-flip-vs-wf_vblank
Looking at a few examples it seems to always be the same register and only ever
this testcase. Affected machine is byt-nuc. Testcase itself succeeds, it's just
the WARNING noise in dmesg
[ 262.864984] ------------[ cut here ]------------
[ 262.865025] WARNING: CPU: 1 PID: 6799 at
drivers/gpu/drm/i915/intel_uncore.c:638 __unclaimed_reg_debug+0x68/0x80
[i915]()
[ 262.865029] Unclaimed register detected before reading register 0x186500
[ 262.865032] Modules linked in: i915 intel_powerclamp coretemp
crct10dif_pclmul crc32_pclmul lpc_ich i2c_hid i2c_designware_platform
i2c_designware_core r8169 mii sdhci_acpi sdhci mmc_core [last unloaded: i915]
[ 262.865057] CPU: 1 PID: 6799 Comm: kms_pipe_crc_ba Tainted: G U W
4.4.0-gfxbench+ #1
[ 262.865060] Hardware name:
\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff
\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/DN2820FYK,
BIOS FYBYT10H.86A.0038.2014.0717.1455 07/17/2014
[ 262.865064] ffffffffa0338cf8 ffff88007448ba78 ffffffff813df90c
ffff88007448bac0
[ 262.865071] ffff88007448bab0 ffffffff810746e1 0000000000186500
0000000000000001
[ 262.865077] 0000000000000001 ffff880074420000 0000000000000000
ffff88007448bb10
[ 262.865083] Call Trace:
[ 262.865092] [<ffffffff813df90c>] dump_stack+0x4e/0x82
[ 262.865098] [<ffffffff810746e1>] warn_slowpath_common+0x81/0xc0
[ 262.865102] [<ffffffff81074767>] warn_slowpath_fmt+0x47/0x50
[ 262.865128] [<ffffffffa02a07e8>] __unclaimed_reg_debug+0x68/0x80 [i915]
[ 262.865154] [<ffffffffa02a0e4e>] vlv_read32+0x2de/0x370 [i915]
[ 262.865173] [<ffffffffa0256837>] intel_set_memory_cxsr+0x87/0x1a0 [i915]
[ 262.865200] [<ffffffffa02c4cb3>] intel_pre_plane_update+0xb3/0xf0 [i915]
[ 262.865228] [<ffffffffa02c54b5>] intel_atomic_commit+0x3b5/0x17c0 [i915]
[ 262.865234] [<ffffffff8150dc45>] ? drm_atomic_check_only+0x145/0x660
[ 262.865239] [<ffffffff8150d75a>] ?
drm_atomic_set_crtc_for_connector+0x6a/0xe0
[ 262.865243] [<ffffffff8150e192>] drm_atomic_commit+0x32/0x50
[ 262.865249] [<ffffffff814eb155>] drm_atomic_helper_set_config+0x75/0xb0
[ 262.865253] [<ffffffff814fd090>] drm_mode_set_config_internal+0x60/0x110
[ 262.865258] [<ffffffff81501e26>] drm_mode_setcrtc+0x186/0x4f0
[ 262.865263] [<ffffffff814f3eed>] drm_ioctl+0x13d/0x590
[ 262.865267] [<ffffffff81501ca0>] ? drm_mode_setplane+0x1b0/0x1b0
[ 262.865273] [<ffffffff811d4c4c>] do_vfs_ioctl+0x2fc/0x550
[ 262.865278] [<ffffffff8118d5ea>] ? vm_munmap+0x4a/0x60
[ 262.865283] [<ffffffff811e06ba>] ? __fget_light+0x6a/0x90
[ 262.865287] [<ffffffff811d4edc>] SyS_ioctl+0x3c/0x70
[ 262.865292] [<ffffffff8179a75b>] entry_SYSCALL_64_fastpath+0x16/0x73
[ 262.865296] ---[ end trace 6387a0ad001bb39f ]---</pre>
</div>
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