/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * max98357a.c -- MAX98357A ALSA SoC Codec driver
 */

#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>

static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
		int cmd, struct snd_soc_dai *dai)
{
	struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);

	if (!sdmode)
		return 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		gpiod_set_value(sdmode, 1);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		gpiod_set_value(sdmode, 0);
		break;
	}

	return 0;
}

static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("Speaker"),
};

static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
	{"Speaker", NULL, "HiFi Playback"},
};

static int max98357a_codec_probe(struct snd_soc_codec *codec)
{
	struct gpio_desc *sdmode;

	sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
	if (IS_ERR(sdmode))
		return PTR_ERR(sdmode);

	snd_soc_codec_set_drvdata(codec, sdmode);

	return 0;
}

static struct snd_soc_codec_driver max98357a_codec_driver = {
	.probe			= max98357a_codec_probe,
	.component_driver = {
		.dapm_widgets		= max98357a_dapm_widgets,
		.num_dapm_widgets	= ARRAY_SIZE(max98357a_dapm_widgets),
		.dapm_routes		= max98357a_dapm_routes,
		.num_dapm_routes	= ARRAY_SIZE(max98357a_dapm_routes),
	},
};

static const struct snd_soc_dai_ops max98357a_dai_ops = {
	.trigger	= max98357a_daiops_trigger,
};

static struct snd_soc_dai_driver max98357a_dai_driver = {
	.name = "HiFi",
	.playback = {
		.stream_name	= "HiFi Playback",
		.formats	= SNDRV_PCM_FMTBIT_S16 |
					SNDRV_PCM_FMTBIT_S24 |
					SNDRV_PCM_FMTBIT_S32,
		.rates		= SNDRV_PCM_RATE_8000 |
					SNDRV_PCM_RATE_16000 |
					SNDRV_PCM_RATE_48000 |
					SNDRV_PCM_RATE_96000,
		.rate_min	= 8000,
		.rate_max	= 96000,
		.channels_min	= 1,
		.channels_max	= 2,
	},
	.ops    = &max98357a_dai_ops,
};

static int max98357a_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
			&max98357a_dai_driver, 1);
}

static int max98357a_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id max98357a_device_id[] = {
	{ .compatible = "maxim,max98357a" },
	{}
};
MODULE_DEVICE_TABLE(of, max98357a_device_id);
#endif

#ifdef CONFIG_ACPI
static const struct acpi_device_id max98357a_acpi_match[] = {
	{ "MX98357A", 0 },
	{},
};
MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);
#endif

static struct platform_driver max98357a_platform_driver = {
	.driver = {
		.name = "max98357a",
		.of_match_table = of_match_ptr(max98357a_device_id),
		.acpi_match_table = ACPI_PTR(max98357a_acpi_match),
	},
	.probe	= max98357a_platform_probe,
	.remove = max98357a_platform_remove,
};
module_platform_driver(max98357a_platform_driver);

MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
MODULE_LICENSE("GPL v2");
/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>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/ctxfi/ctmixer.h?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/ctxfi/ctmixer.h?id=433e19cf33d34bb6751c874a9c00980552fe508c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/ctxfi/ctmixer.h?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>sound/pci/ctxfi/ctmixer.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/ctxfi/ctmixer.h?h=nds-private-remove&amp;id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/ctxfi/ctmixer.h?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'sound/pci/ctxfi/ctmixer.h')</div><table summary='diffstat' class='diffstat'>