/*
 * Line 6 Linux USB driver
 *
 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License as
 *	published by the Free Software Foundation, version 2.
 *
 */

#ifndef PLAYBACK_H
#define PLAYBACK_H

#include <sound/pcm.h>

#include "driver.h"

/*
 * When the TonePort is used with jack in full duplex mode and the outputs are
 * not connected, the software monitor produces an ugly noise since everything
 * written to the output buffer (i.e., the input signal) will be repeated in
 * the next period (sounds like a delay effect). As a workaround, the output
 * buffer is cleared after the data have been read, but there must be a better
 * solution. Until one is found, this workaround can be used to fix the
 * problem.
 */
#define USE_CLEAR_BUFFER_WORKAROUND 1

extern struct snd_pcm_ops snd_line6_playback_ops;

extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm);
extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm);

#endif
ster</option>
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=52f5631a4c056ad01682393be56d2be237e81610'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/clock/r8a7793-clock.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/clock/r8a7793-clock.h?id=52f5631a4c056ad01682393be56d2be237e81610'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/r8a7793-clock.h?id=52f5631a4c056ad01682393be56d2be237e81610'>commit</a><a class='active' href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock/r8a7793-clock.h?id=52f5631a4c056ad01682393be56d2be237e81610'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/clock/r8a7793-clock.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=52f5631a4c056ad01682393be56d2be237e81610'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include?id=52f5631a4c056ad01682393be56d2be237e81610'>include</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings?id=52f5631a4c056ad01682393be56d2be237e81610'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock?id=52f5631a4c056ad01682393be56d2be237e81610'>clock</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock/r8a7793-clock.h?id=52f5631a4c056ad01682393be56d2be237e81610'>r8a7793-clock.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='52f5631a4c056ad01682393be56d2be237e81610'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=52f5631a4c056ad01682393be56d2be237e81610'>Diffstat</a> (limited to 'include/dt-bindings/clock/r8a7793-clock.h')</div><table summary='diffstat' class='diffstat'>gt;</td><td class='right'>2017-02-03 14:18:39 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-02-04 00:11:08 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/reset/altr,rst-mgr-a10.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/reset/altr,rst-mgr-a10.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>c666f7a26b860674848949e39a610222b0723f89</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/reset/altr,rst-mgr-a10.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include/dt-bindings/reset/altr,rst-mgr-a10.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/reset/altr,rst-mgr-a10.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/reset/altr,rst-mgr-a10.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3&amp;id2=3c223c19aea85d3dda1416c187915f4a30b04b1f'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: intel_pstate: Disable energy efficiency optimization</div><div class='commit-msg'>Some Kabylake desktop processors may not reach max turbo when running in
HWP mode, even if running under sustained 100% utilization.

This occurs when the HWP.EPP (Energy Performance Preference) is set to
"balance_power" (0x80) -- the default on most systems.

It occurs because the platform BIOS may erroneously enable an
energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not
recommended to be enabled on this SKU.

On the failing systems, this BIOS issue was not discovered when the
desktop motherboard was tested with Windows, because the BIOS also
neglects to provide the ACPI/CPPC table, that Windows requires to enable
HWP, and so Windows runs in legacy P-state mode, where this setting has
no effect.

Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and
so it runs in HWP mode, exposing this incorrect BIOS configuration.

There are several ways to address this problem.

First, Linux can also run in legacy P-state mode on this system.
As intel_pstate is how Linux enables HWP, booting with
"intel_pstate=disable"
will run in acpi-cpufreq/ondemand legacy p-state mode.

Or second, the "performance" governor can be used with intel_pstate,
which will modify HWP.EPP to 0.

Or third, starting in 4.10, the
/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
attribute in can be updated from "balance_power" to "performance".

Or fourth, apply this patch, which fixes the erroneous setting of
MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default
configuration to function as designed.

Signed-off-by: Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;
Reviewed-by: Len Brown &lt;len.brown@intel.com&gt;
Cc: 4.6+ &lt;stable@vger.kernel.org&gt; # 4.6+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>Diffstat</a> (limited to 'include/dt-bindings/reset/altr,rst-mgr-a10.h')</div><table summary='diffstat' class='diffstat'>