/* Helper functions for Thinkpad LED control;
 * to be included from codec driver
 */

#if IS_ENABLED(CONFIG_THINKPAD_ACPI)

#include <linux/acpi.h>
#include <linux/thinkpad_acpi.h>

static int (*led_set_func)(int, bool);
static void (*old_vmaster_hook)(void *, int);

static bool is_thinkpad(struct hda_codec *codec)
{
	return (codec->core.subsystem_id >> 16 == 0x17aa) &&
	       (acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") ||
		acpi_dev_found("IBM0068"));
}

static void update_tpacpi_mute_led(void *private_data, int enabled)
{
	if (old_vmaster_hook)
		old_vmaster_hook(private_data, enabled);

	if (led_set_func)
		led_set_func(TPACPI_LED_MUTE, !enabled);
}

static void update_tpacpi_micmute_led(struct hda_codec *codec,
				      struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	if (!ucontrol || !led_set_func)
		return;
	if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
		/* TODO: How do I verify if it's a mono or stereo here? */
		bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1];
		led_set_func(TPACPI_LED_MICMUTE, !val);
	}
}

static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
				    const struct hda_fixup *fix, int action)
{
	struct hda_gen_spec *spec = codec->spec;
	bool removefunc = false;

	if (action == HDA_FIXUP_ACT_PROBE) {
		if (!is_thinkpad(codec))
			return;
		if (!led_set_func)
			led_set_func = symbol_request(tpacpi_led_set);
		if (!led_set_func) {
			codec_warn(codec,
				   "Failed to find thinkpad-acpi symbol tpacpi_led_set\n");
			return;
		}

		removefunc = true;
		if (led_set_func(TPACPI_LED_MUTE, false) >= 0) {
			old_vmaster_hook = spec->vmaster_mute.hook;
			spec->vmaster_mute.hook = update_tpacpi_mute_led;
			removefunc = false;
		}
		if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) {
			if (spec->num_adc_nids > 1 && !spec->dyn_adc_switch)
				codec_dbg(codec,
					  "Skipping micmute LED control due to several ADCs");
			else {
				spec->cap_sync_hook = update_tpacpi_micmute_led;
				removefunc = false;
			}
		}
	}

	if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
		symbol_put(tpacpi_led_set);
		led_set_func = NULL;
		old_vmaster_hook = NULL;
	}
}

#else /* CONFIG_THINKPAD_ACPI */

static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
				    const struct hda_fixup *fix, int action)
{
}

#endif /* CONFIG_THINKPAD_ACPI */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>xen</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen/page.h?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>page.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='b272f732f888d4cf43c943a40c9aaa836f9b7431'/><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'>2016-12-25 14:05:56 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:05:56 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/page.h?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>b272f732f888d4cf43c943a40c9aaa836f9b7431</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen/page.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/page.h?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>10bbe7599e2755d3f3e100103967788b8b5a4bce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/page.h?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431&amp;id2=10bbe7599e2755d3f3e100103967788b8b5a4bce'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/page.h?h=nds-private-remove&amp;id=008b69e4d52f2cbee3ed0d0502edd78155000b1a'>008b69e4d52f2cbee3ed0d0502edd78155000b1a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/page.h?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431&amp;id2=008b69e4d52f2cbee3ed0d0502edd78155000b1a'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull SMP hotplug notifier removal from Thomas Gleixner:
 "This is the final cleanup of the hotplug notifier infrastructure. The
  series has been reintgrated in the last two days because there came a
  new driver using the old infrastructure via the SCSI tree.

  Summary:

   - convert the last leftover drivers utilizing notifiers

   - fixup for a completely broken hotplug user

   - prevent setup of already used states

   - removal of the notifiers

   - treewide cleanup of hotplug state names

   - consolidation of state space

  There is a sphinx based documentation pending, but that needs review
  from the documentation folks"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/armada-xp: Consolidate hotplug state space
  irqchip/gic: Consolidate hotplug state space
  coresight/etm3/4x: Consolidate hotplug state space
  cpu/hotplug: Cleanup state names
  cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
  staging/lustre/libcfs: Convert to hotplug state machine
  scsi/bnx2i: Convert to hotplug state machine
  scsi/bnx2fc: Convert to hotplug state machine
  cpu/hotplug: Prevent overwriting of callbacks
  x86/msr: Remove bogus cleanup from the error path
  bus: arm-ccn: Prevent hotplug callback leak
  perf/x86/intel/cstate: Prevent hotplug callback leak
  ARM/imx/mmcd: Fix broken cpu hotplug handling
  scsi: qedi: Convert to hotplug state machine
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>Diffstat</a> (limited to 'include/xen/page.h')</div><table summary='diffstat' class='diffstat'>