/*
 * Generic AC97 sound support for SH7760
 *
 * (c) 2007 Manuel Lauss
 *
 * Licensed under the GPLv2.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/io.h>

#define IPSEL 0xFE400034

static struct snd_soc_dai_link sh7760_ac97_dai = {
	.name = "AC97",
	.stream_name = "AC97 HiFi",
	.cpu_dai_name = "hac-dai.0",	/* HAC0 */
	.codec_dai_name = "ac97-hifi",
	.platform_name = "sh7760-pcm-audio",
	.codec_name = "ac97-codec",
	.ops = NULL,
};

static struct snd_soc_card sh7760_ac97_soc_machine  = {
	.name = "SH7760 AC97",
	.owner = THIS_MODULE,
	.dai_link = &sh7760_ac97_dai,
	.num_links = 1,
};

static struct platform_device *sh7760_ac97_snd_device;

static int __init sh7760_ac97_init(void)
{
	int ret;
	unsigned short ipsel;

	/* enable both AC97 controllers in pinmux reg */
	ipsel = __raw_readw(IPSEL);
	__raw_writew(ipsel | (3 << 10), IPSEL);

	ret = -ENOMEM;
	sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
	if (!sh7760_ac97_snd_device)
		goto out;

	platform_set_drvdata(sh7760_ac97_snd_device,
			     &sh7760_ac97_soc_machine);
	ret = platform_device_add(sh7760_ac97_snd_device);

	if (ret)
		platform_device_put(sh7760_ac97_snd_device);

out:
	return ret;
}

static void __exit sh7760_ac97_exit(void)
{
	platform_device_unregister(sh7760_ac97_snd_device);
}

module_init(sh7760_ac97_init);
module_exit(sh7760_ac97_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
/refs/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/math-emu'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/math-emu'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>math-emu</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6e978b22efa1db9f6e71b24440b5f1d93e968ee3'/><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><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&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/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/math-emu?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/math-emu?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include/math-emu</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/math-emu?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/math-emu?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/math-emu')</div><table summary='diffstat' class='diffstat'>