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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96214">bug 96214</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>RESOLVED
</td>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96214#c24">Comment # 24</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96214">bug 96214</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>commit d838a110f0b310d408ebe6b5a97e36ec27555ebf
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Aug 3 17:09:00 2016 +0100
drm/i915: Acquire audio powerwell for HD-Audio registers
On Haswell/Broadwell, the HD-Audio block is inside the HDMI/display
power well and so the sna-hda audio codec acquires the display power
well while it is operational. However, Skylake separates the powerwells
again, but yet we still need the audio powerwell to setup the registers.
(But then the hardware uses those registers even while powered off???)
Acquiring the powerwell around setting the chicken bits when setting up
the audio channel does at least silence the WARNs from touching our
registers whilst unpowered. We silence our own test cases, but maybe
there is a latent bug in using the audio channel?
v2: Grab both rpm wakelock and audio wakelock
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend@basic-s4"
href="show_bug.cgi?id=96214">https://bugs.freedesktop.org/show_bug.cgi?id=96214</a>
Fixes: 03b135cebc47 "ALSA: hda - remove dependency on i915 power well for
SKL")
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Cc: Libin Yang <<a href="mailto:libin.yang@intel.com">libin.yang@intel.com</a>>
Cc: Takashi Iwai <<a href="mailto:tiwai@suse.de">tiwai@suse.de</a>>
Cc: Marius Vlad <<a href="mailto:marius.c.vlad@intel.com">marius.c.vlad@intel.com</a>>
Tested-by: Hans de Goede <<a href="mailto:hdegoede@redhat.com">hdegoede@redhat.com</a>>
Cc: <a href="mailto:stable@vger.kernel.org">stable@vger.kernel.org</a>
Link:
<a href="http://patchwork.freedesktop.org/patch/msgid/1470240540-29004-1-git-send-email-chris@chris-wilson.co.uk">http://patchwork.freedesktop.org/patch/msgid/1470240540-29004-1-git-send-email-chris@chris-wilson.co.uk</a>
Reviewed-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
will mask this bug, but please keep your ears peeled for any glitches.</pre>
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