/*
 * Helper functions for jack-detection kcontrols
 *
 * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
 *
 * 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; either version 2 of the License, or (at your option)
 * any later version.
 */

#include <linux/kernel.h>
#include <linux/export.h>
#include <sound/core.h>
#include <sound/control.h>

#define jack_detect_kctl_info	snd_ctl_boolean_mono_info

static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = kcontrol->private_value;
	return 0;
}

static struct snd_kcontrol_new jack_detect_kctl = {
	/* name is filled later */
	.iface = SNDRV_CTL_ELEM_IFACE_CARD,
	.access = SNDRV_CTL_ELEM_ACCESS_READ,
	.info = jack_detect_kctl_info,
	.get = jack_detect_kctl_get,
};

static int get_available_index(struct snd_card *card, const char *name)
{
	struct snd_ctl_elem_id sid;

	memset(&sid, 0, sizeof(sid));

	sid.index = 0;
	sid.iface = SNDRV_CTL_ELEM_IFACE_CARD;
	strlcpy(sid.name, name, sizeof(sid.name));

	while (snd_ctl_find_id(card, &sid)) {
		sid.index++;
		/* reset numid; otherwise snd_ctl_find_id() hits this again */
		sid.numid = 0;
	}

	return sid.index;
}

static void jack_kctl_name_gen(char *name, const char *src_name, int size)
{
	size_t count = strlen(src_name);
	bool need_cat = true;

	/* remove redundant " Jack" from src_name */
	if (count >= 5)
		need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false;

	snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name);

}

struct snd_kcontrol *
snd_kctl_jack_new(const char *name, struct snd_card *card)
{
	struct snd_kcontrol *kctl;

	kctl = snd_ctl_new1(&jack_detect_kctl, NULL);
	if (!kctl)
		return NULL;

	jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name));
	kctl->id.index = get_available_index(card, kctl->id.name);
	kctl->private_value = 0;
	return kctl;
}

void snd_kctl_jack_report(struct snd_card *card,
			  struct snd_kcontrol *kctl, bool status)
{
	if (kctl->private_value == status)
		return;
	kctl->private_value = status;
	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=4759d386d55fef452d692bf101167914437e848e'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=4759d386d55fef452d692bf101167914437e848e'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=4759d386d55fef452d692bf101167914437e848e'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch?id=4759d386d55fef452d692bf101167914437e848e'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e'>arm64</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='4759d386d55fef452d692bf101167914437e848e'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-01 12:27:05 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-01 12:27:05 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e'>4759d386d55fef452d692bf101167914437e848e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=4759d386d55fef452d692bf101167914437e848e'>e7109c192ec589fcea2a98f9702aa3c0e4009581</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e'>tools/perf/arch/arm64</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/arm64?id=238d1d0f79f619d75c2cc741d6770fb0986aef24'>238d1d0f79f619d75c2cc741d6770fb0986aef24</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e&amp;id2=238d1d0f79f619d75c2cc741d6770fb0986aef24'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/arm64?id=1db175428ee374489448361213e9c3b749d14900'>1db175428ee374489448361213e9c3b749d14900</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/arch/arm64?id=4759d386d55fef452d692bf101167914437e848e&amp;id2=1db175428ee374489448361213e9c3b749d14900'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm</div><div class='commit-msg'>Pull DAX updates from Dan Williams:
 "The completion of Jan's DAX work for 4.10.

  As I mentioned in the libnvdimm-for-4.10 pull request, these are some
  final fixes for the DAX dirty-cacheline-tracking invalidation work
  that was merged through the -mm, ext4, and xfs trees in -rc1. These
  patches were prepared prior to the merge window, but we waited for
  4.10-rc1 to have a stable merge base after all the prerequisites were
  merged.

  Quoting Jan on the overall changes in these patches:

     "So I'd like all these 6 patches to go for rc2. The first three
      patches fix invalidation of exceptional DAX entries (a bug which
      is there for a long time) - without these patches data loss can
      occur on power failure even though user called fsync(2). The other
      three patches change locking of DAX faults so that -&gt;iomap_begin()
      is called in a more relaxed locking context and we are safe to
      start a transaction there for ext4"

  These have received a build success notification from the kbuild
  robot, and pass the latest libnvdimm unit tests. There have not been
  any -next releases since -rc1, so they have not appeared there"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  ext4: Simplify DAX fault path
  dax: Call -&gt;iomap_begin without entry lock during dax fault
  dax: Finish fault completely when loading holes
  dax: Avoid page invalidation races and unnecessary radix tree traversals
  mm: Invalidate DAX radix tree entries only if appropriate
  ext2: Return BH_New buffers for zeroed blocks
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=4759d386d55fef452d692bf101167914437e848e'>Diffstat</a> (limited to 'tools/perf/arch/arm64')</div><table summary='diffstat' class='diffstat'>