2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
46 #include <trace/events/asoc.h>
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
50 #define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
51 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
53 #define snd_soc_dapm_for_each_direction(dir) \
54 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
57 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
58 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
60 int (*connected)(struct snd_soc_dapm_widget *source,
61 struct snd_soc_dapm_widget *sink));
63 struct snd_soc_dapm_widget *
64 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
65 const struct snd_soc_dapm_widget *widget);
67 struct snd_soc_dapm_widget *
68 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
69 const struct snd_soc_dapm_widget *widget);
71 /* dapm power sequences - make this per codec in the future */
72 static int dapm_up_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_regulator_supply] = 1,
75 [snd_soc_dapm_clock_supply] = 1,
76 [snd_soc_dapm_supply] = 2,
77 [snd_soc_dapm_micbias] = 3,
78 [snd_soc_dapm_dai_link] = 2,
79 [snd_soc_dapm_dai_in] = 4,
80 [snd_soc_dapm_dai_out] = 4,
81 [snd_soc_dapm_aif_in] = 4,
82 [snd_soc_dapm_aif_out] = 4,
83 [snd_soc_dapm_mic] = 5,
84 [snd_soc_dapm_mux] = 6,
85 [snd_soc_dapm_demux] = 6,
86 [snd_soc_dapm_dac] = 7,
87 [snd_soc_dapm_switch] = 8,
88 [snd_soc_dapm_mixer] = 8,
89 [snd_soc_dapm_mixer_named_ctl] = 8,
90 [snd_soc_dapm_pga] = 9,
91 [snd_soc_dapm_adc] = 10,
92 [snd_soc_dapm_out_drv] = 11,
93 [snd_soc_dapm_hp] = 11,
94 [snd_soc_dapm_spk] = 11,
95 [snd_soc_dapm_line] = 11,
96 [snd_soc_dapm_kcontrol] = 12,
97 [snd_soc_dapm_post] = 13,
100 static int dapm_down_seq[] = {
101 [snd_soc_dapm_pre] = 0,
102 [snd_soc_dapm_kcontrol] = 1,
103 [snd_soc_dapm_adc] = 2,
104 [snd_soc_dapm_hp] = 3,
105 [snd_soc_dapm_spk] = 3,
106 [snd_soc_dapm_line] = 3,
107 [snd_soc_dapm_out_drv] = 3,
108 [snd_soc_dapm_pga] = 4,
109 [snd_soc_dapm_switch] = 5,
110 [snd_soc_dapm_mixer_named_ctl] = 5,
111 [snd_soc_dapm_mixer] = 5,
112 [snd_soc_dapm_dac] = 6,
113 [snd_soc_dapm_mic] = 7,
114 [snd_soc_dapm_micbias] = 8,
115 [snd_soc_dapm_mux] = 9,
116 [snd_soc_dapm_demux] = 9,
117 [snd_soc_dapm_aif_in] = 10,
118 [snd_soc_dapm_aif_out] = 10,
119 [snd_soc_dapm_dai_in] = 10,
120 [snd_soc_dapm_dai_out] = 10,
121 [snd_soc_dapm_dai_link] = 11,
122 [snd_soc_dapm_supply] = 12,
123 [snd_soc_dapm_clock_supply] = 13,
124 [snd_soc_dapm_regulator_supply] = 13,
125 [snd_soc_dapm_post] = 14,
128 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
130 if (dapm->card && dapm->card->instantiated)
131 lockdep_assert_held(&dapm->card->dapm_mutex);
134 static void pop_wait(u32 pop_time)
137 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
140 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
148 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
153 vsnprintf(buf, PAGE_SIZE, fmt, args);
154 dev_info(dev, "%s", buf);
160 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
162 return !list_empty(&w->dirty);
165 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
167 dapm_assert_locked(w->dapm);
169 if (!dapm_dirty_widget(w)) {
170 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
172 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
177 * Common implementation for dapm_widget_invalidate_input_paths() and
178 * dapm_widget_invalidate_output_paths(). The function is inlined since the
179 * combined size of the two specialized functions is only marginally larger then
180 * the size of the generic function and at the same time the fast path of the
181 * specialized functions is significantly smaller than the generic function.
183 static __always_inline void dapm_widget_invalidate_paths(
184 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
186 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
187 struct snd_soc_dapm_widget *node;
188 struct snd_soc_dapm_path *p;
191 dapm_assert_locked(w->dapm);
193 if (w->endpoints[dir] == -1)
196 list_add_tail(&w->work_list, &list);
197 w->endpoints[dir] = -1;
199 list_for_each_entry(w, &list, work_list) {
200 snd_soc_dapm_widget_for_each_path(w, dir, p) {
201 if (p->is_supply || p->weak || !p->connect)
203 node = p->node[rdir];
204 if (node->endpoints[dir] != -1) {
205 node->endpoints[dir] = -1;
206 list_add_tail(&node->work_list, &list);
213 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
215 * @w: The widget for which to invalidate the cached number of input paths
217 * Resets the cached number of inputs for the specified widget and all widgets
218 * that can be reached via outcoming paths from the widget.
220 * This function must be called if the number of output paths for a widget might
221 * have changed. E.g. if the source state of a widget changes or a path is added
222 * or activated with the widget as the sink.
224 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
226 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
230 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
232 * @w: The widget for which to invalidate the cached number of output paths
234 * Resets the cached number of outputs for the specified widget and all widgets
235 * that can be reached via incoming paths from the widget.
237 * This function must be called if the number of output paths for a widget might
238 * have changed. E.g. if the sink state of a widget changes or a path is added
239 * or activated with the widget as the source.
241 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
243 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
247 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
248 * for the widgets connected to a path
249 * @p: The path to invalidate
251 * Resets the cached number of inputs for the sink of the path and the cached
252 * number of outputs for the source of the path.
254 * This function must be called when a path is added, removed or the connected
257 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
260 * Weak paths or supply paths do not influence the number of input or
261 * output paths of their neighbors.
263 if (p->weak || p->is_supply)
267 * The number of connected endpoints is the sum of the number of
268 * connected endpoints of all neighbors. If a node with 0 connected
269 * endpoints is either connected or disconnected that sum won't change,
270 * so there is no need to re-check the path.
272 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
273 dapm_widget_invalidate_input_paths(p->sink);
274 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
275 dapm_widget_invalidate_output_paths(p->source);
278 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
280 struct snd_soc_dapm_widget *w;
282 mutex_lock(&card->dapm_mutex);
284 list_for_each_entry(w, &card->widgets, list) {
286 dapm_mark_dirty(w, "Rechecking endpoints");
287 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
288 dapm_widget_invalidate_output_paths(w);
289 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
290 dapm_widget_invalidate_input_paths(w);
294 mutex_unlock(&card->dapm_mutex);
296 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
298 /* create a new dapm widget */
299 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
300 const struct snd_soc_dapm_widget *_widget)
302 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
305 struct dapm_kcontrol_data {
307 struct snd_soc_dapm_widget *widget;
308 struct list_head paths;
309 struct snd_soc_dapm_widget_list *wlist;
312 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
313 struct snd_kcontrol *kcontrol, const char *ctrl_name)
315 struct dapm_kcontrol_data *data;
316 struct soc_mixer_control *mc;
321 data = kzalloc(sizeof(*data), GFP_KERNEL);
325 INIT_LIST_HEAD(&data->paths);
327 switch (widget->id) {
328 case snd_soc_dapm_switch:
329 case snd_soc_dapm_mixer:
330 case snd_soc_dapm_mixer_named_ctl:
331 mc = (struct soc_mixer_control *)kcontrol->private_value;
333 if (mc->autodisable) {
334 struct snd_soc_dapm_widget template;
336 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
343 memset(&template, 0, sizeof(template));
344 template.reg = mc->reg;
345 template.mask = (1 << fls(mc->max)) - 1;
346 template.shift = mc->shift;
348 template.off_val = mc->max;
350 template.off_val = 0;
351 template.on_val = template.off_val;
352 template.id = snd_soc_dapm_kcontrol;
353 template.name = name;
355 data->value = template.on_val;
358 snd_soc_dapm_new_control_unlocked(widget->dapm,
367 case snd_soc_dapm_demux:
368 case snd_soc_dapm_mux:
369 e = (struct soc_enum *)kcontrol->private_value;
371 if (e->autodisable) {
372 struct snd_soc_dapm_widget template;
374 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
381 memset(&template, 0, sizeof(template));
382 template.reg = e->reg;
383 template.mask = e->mask << e->shift_l;
384 template.shift = e->shift_l;
385 template.off_val = snd_soc_enum_item_to_val(e, 0);
386 template.on_val = template.off_val;
387 template.id = snd_soc_dapm_kcontrol;
388 template.name = name;
390 data->value = template.on_val;
392 data->widget = snd_soc_dapm_new_control_unlocked(
393 widget->dapm, &template);
400 snd_soc_dapm_add_path(widget->dapm, data->widget,
408 kcontrol->private_data = data;
417 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
419 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
424 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
425 const struct snd_kcontrol *kcontrol)
427 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
432 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
433 struct snd_soc_dapm_widget *widget)
435 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
436 struct snd_soc_dapm_widget_list *new_wlist;
440 n = data->wlist->num_widgets + 1;
444 new_wlist = krealloc(data->wlist,
445 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
449 new_wlist->widgets[n - 1] = widget;
450 new_wlist->num_widgets = n;
452 data->wlist = new_wlist;
457 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
458 struct snd_soc_dapm_path *path)
460 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
462 list_add_tail(&path->list_kcontrol, &data->paths);
465 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
467 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
472 return data->widget->power;
475 static struct list_head *dapm_kcontrol_get_path_list(
476 const struct snd_kcontrol *kcontrol)
478 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
483 #define dapm_kcontrol_for_each_path(path, kcontrol) \
484 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
487 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
489 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
495 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
498 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
500 if (data->value == value)
504 data->widget->on_val = value;
512 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
514 * @kcontrol: The kcontrol
516 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
517 struct snd_kcontrol *kcontrol)
519 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
521 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
524 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
526 * @kcontrol: The kcontrol
528 * Note: This function must only be used on kcontrols that are known to have
529 * been registered for a CODEC. Otherwise the behaviour is undefined.
531 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
532 struct snd_kcontrol *kcontrol)
534 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
536 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
538 static void dapm_reset(struct snd_soc_card *card)
540 struct snd_soc_dapm_widget *w;
542 lockdep_assert_held(&card->dapm_mutex);
544 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
546 list_for_each_entry(w, &card->widgets, list) {
547 w->new_power = w->power;
548 w->power_checked = false;
552 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
554 if (!dapm->component)
556 return dapm->component->name_prefix;
559 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
562 if (!dapm->component)
564 return snd_soc_component_read(dapm->component, reg, value);
567 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
568 int reg, unsigned int mask, unsigned int value)
570 if (!dapm->component)
572 return snd_soc_component_update_bits(dapm->component, reg,
576 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
577 int reg, unsigned int mask, unsigned int value)
579 if (!dapm->component)
581 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
584 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
587 snd_soc_component_async_complete(dapm->component);
590 static struct snd_soc_dapm_widget *
591 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
593 struct snd_soc_dapm_widget *w = wcache->widget;
594 struct list_head *wlist;
599 wlist = &w->dapm->card->widgets;
601 list_for_each_entry_from(w, wlist, list) {
602 if (!strcmp(name, w->name))
613 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
614 struct snd_soc_dapm_widget *w)
620 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
621 * @dapm: The DAPM context for which to set the level
622 * @level: The level to set
624 * Forces the DAPM bias level to a specific state. It will call the bias level
625 * callback of DAPM context with the specified level. This will even happen if
626 * the context is already at the same level. Furthermore it will not go through
627 * the normal bias level sequencing, meaning any intermediate states between the
628 * current and the target state will not be entered.
630 * Note that the change in bias level is only temporary and the next time
631 * snd_soc_dapm_sync() is called the state will be set to the level as
632 * determined by the DAPM core. The function is mainly intended to be used to
633 * used during probe or resume from suspend to power up the device so
634 * initialization can be done, before the DAPM core takes over.
636 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
637 enum snd_soc_bias_level level)
641 if (dapm->set_bias_level)
642 ret = dapm->set_bias_level(dapm, level);
645 dapm->bias_level = level;
649 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
652 * snd_soc_dapm_set_bias_level - set the bias level for the system
653 * @dapm: DAPM context
654 * @level: level to configure
656 * Configure the bias (power) levels for the SoC audio device.
658 * Returns 0 for success else error.
660 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
661 enum snd_soc_bias_level level)
663 struct snd_soc_card *card = dapm->card;
666 trace_snd_soc_bias_level_start(card, level);
668 if (card && card->set_bias_level)
669 ret = card->set_bias_level(card, dapm, level);
673 if (!card || dapm != &card->dapm)
674 ret = snd_soc_dapm_force_bias_level(dapm, level);
679 if (card && card->set_bias_level_post)
680 ret = card->set_bias_level_post(card, dapm, level);
682 trace_snd_soc_bias_level_done(card, level);
687 /* connect mux widget to its interconnecting audio paths */
688 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
689 struct snd_soc_dapm_path *path, const char *control_name,
690 struct snd_soc_dapm_widget *w)
692 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
693 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
694 unsigned int val, item;
697 if (e->reg != SND_SOC_NOPM) {
698 soc_dapm_read(dapm, e->reg, &val);
699 val = (val >> e->shift_l) & e->mask;
700 item = snd_soc_enum_val_to_item(e, val);
702 /* since a virtual mux has no backing registers to
703 * decide which path to connect, it will try to match
704 * with the first enumeration. This is to ensure
705 * that the default mux choice (the first) will be
706 * correctly powered up during initialization.
711 for (i = 0; i < e->items; i++) {
712 if (!(strcmp(control_name, e->texts[i]))) {
713 path->name = e->texts[i];
725 /* set up initial codec paths */
726 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
728 struct soc_mixer_control *mc = (struct soc_mixer_control *)
729 p->sink->kcontrol_news[i].private_value;
730 unsigned int reg = mc->reg;
731 unsigned int shift = mc->shift;
732 unsigned int max = mc->max;
733 unsigned int mask = (1 << fls(max)) - 1;
734 unsigned int invert = mc->invert;
737 if (reg != SND_SOC_NOPM) {
738 soc_dapm_read(p->sink->dapm, reg, &val);
739 val = (val >> shift) & mask;
748 /* connect mixer widget to its interconnecting audio paths */
749 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
750 struct snd_soc_dapm_path *path, const char *control_name)
754 /* search for mixer kcontrol */
755 for (i = 0; i < path->sink->num_kcontrols; i++) {
756 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
757 path->name = path->sink->kcontrol_news[i].name;
758 dapm_set_mixer_path_status(path, i);
765 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
766 struct snd_soc_dapm_widget *kcontrolw,
767 const struct snd_kcontrol_new *kcontrol_new,
768 struct snd_kcontrol **kcontrol)
770 struct snd_soc_dapm_widget *w;
775 list_for_each_entry(w, &dapm->card->widgets, list) {
776 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
778 for (i = 0; i < w->num_kcontrols; i++) {
779 if (&w->kcontrol_news[i] == kcontrol_new) {
781 *kcontrol = w->kcontrols[i];
791 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
792 * create it. Either way, add the widget into the control's widget list
794 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
797 struct snd_soc_dapm_context *dapm = w->dapm;
798 struct snd_card *card = dapm->card->snd_card;
802 struct snd_kcontrol *kcontrol;
803 bool wname_in_long_name, kcname_in_long_name;
804 char *long_name = NULL;
808 prefix = soc_dapm_prefix(dapm);
810 prefix_len = strlen(prefix) + 1;
814 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
819 wname_in_long_name = false;
820 kcname_in_long_name = true;
823 case snd_soc_dapm_switch:
824 case snd_soc_dapm_mixer:
825 case snd_soc_dapm_pga:
826 case snd_soc_dapm_out_drv:
827 wname_in_long_name = true;
828 kcname_in_long_name = true;
830 case snd_soc_dapm_mixer_named_ctl:
831 wname_in_long_name = false;
832 kcname_in_long_name = true;
834 case snd_soc_dapm_demux:
835 case snd_soc_dapm_mux:
836 wname_in_long_name = true;
837 kcname_in_long_name = false;
844 if (wname_in_long_name && kcname_in_long_name) {
846 * The control will get a prefix from the control
847 * creation process but we're also using the same
848 * prefix for widgets so cut the prefix off the
849 * front of the widget name.
851 long_name = kasprintf(GFP_KERNEL, "%s %s",
852 w->name + prefix_len,
853 w->kcontrol_news[kci].name);
854 if (long_name == NULL)
858 } else if (wname_in_long_name) {
860 name = w->name + prefix_len;
863 name = w->kcontrol_news[kci].name;
866 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
873 kcontrol->private_free = dapm_kcontrol_free;
875 ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
877 snd_ctl_free_one(kcontrol);
881 ret = snd_ctl_add(card, kcontrol);
884 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
890 ret = dapm_kcontrol_add_widget(kcontrol, w);
892 w->kcontrols[kci] = kcontrol;
900 /* create new dapm mixer control */
901 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
904 struct snd_soc_dapm_path *path;
905 struct dapm_kcontrol_data *data;
908 for (i = 0; i < w->num_kcontrols; i++) {
910 snd_soc_dapm_widget_for_each_source_path(w, path) {
911 /* mixer/mux paths name must match control name */
912 if (path->name != (char *)w->kcontrol_news[i].name)
915 if (!w->kcontrols[i]) {
916 ret = dapm_create_or_share_kcontrol(w, i);
921 dapm_kcontrol_add_path(w->kcontrols[i], path);
923 data = snd_kcontrol_chip(w->kcontrols[i]);
925 snd_soc_dapm_add_path(data->widget->dapm,
935 /* create new dapm mux control */
936 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
938 struct snd_soc_dapm_context *dapm = w->dapm;
939 enum snd_soc_dapm_direction dir;
940 struct snd_soc_dapm_path *path;
945 case snd_soc_dapm_mux:
946 dir = SND_SOC_DAPM_DIR_OUT;
949 case snd_soc_dapm_demux:
950 dir = SND_SOC_DAPM_DIR_IN;
957 if (w->num_kcontrols != 1) {
959 "ASoC: %s %s has incorrect number of controls\n", type,
964 if (list_empty(&w->edges[dir])) {
965 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
969 ret = dapm_create_or_share_kcontrol(w, 0);
973 snd_soc_dapm_widget_for_each_path(w, dir, path) {
975 dapm_kcontrol_add_path(w->kcontrols[0], path);
981 /* create new dapm volume control */
982 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
986 for (i = 0; i < w->num_kcontrols; i++) {
987 ret = dapm_create_or_share_kcontrol(w, i);
995 /* create new dapm dai link control */
996 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
999 struct snd_kcontrol *kcontrol;
1000 struct snd_soc_dapm_context *dapm = w->dapm;
1001 struct snd_card *card = dapm->card->snd_card;
1003 /* create control for links with > 1 config */
1004 if (w->num_params <= 1)
1008 for (i = 0; i < w->num_kcontrols; i++) {
1009 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1011 ret = snd_ctl_add(card, kcontrol);
1014 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1015 w->name, w->kcontrol_news[i].name, ret);
1018 kcontrol->private_data = w;
1019 w->kcontrols[i] = kcontrol;
1025 /* We implement power down on suspend by checking the power state of
1026 * the ALSA card - when we are suspending the ALSA state for the card
1029 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1031 int level = snd_power_get_state(widget->dapm->card->snd_card);
1034 case SNDRV_CTL_POWER_D3hot:
1035 case SNDRV_CTL_POWER_D3cold:
1036 if (widget->ignore_suspend)
1037 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1039 return widget->ignore_suspend;
1045 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1046 struct list_head *widgets)
1048 struct snd_soc_dapm_widget *w;
1049 struct list_head *it;
1050 unsigned int size = 0;
1053 list_for_each(it, widgets)
1056 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1060 list_for_each_entry(w, widgets, work_list)
1061 (*list)->widgets[i++] = w;
1063 (*list)->num_widgets = i;
1069 * Common implementation for is_connected_output_ep() and
1070 * is_connected_input_ep(). The function is inlined since the combined size of
1071 * the two specialized functions is only marginally larger then the size of the
1072 * generic function and at the same time the fast path of the specialized
1073 * functions is significantly smaller than the generic function.
1075 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1076 struct list_head *list, enum snd_soc_dapm_direction dir,
1077 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
1078 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1079 enum snd_soc_dapm_direction)),
1080 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1081 enum snd_soc_dapm_direction))
1083 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1084 struct snd_soc_dapm_path *path;
1087 if (widget->endpoints[dir] >= 0)
1088 return widget->endpoints[dir];
1090 DAPM_UPDATE_STAT(widget, path_checks);
1092 /* do we need to add this widget to the list ? */
1094 list_add_tail(&widget->work_list, list);
1096 if (custom_stop_condition && custom_stop_condition(widget, dir)) {
1097 widget->endpoints[dir] = 1;
1098 return widget->endpoints[dir];
1101 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1102 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1103 return widget->endpoints[dir];
1106 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1107 DAPM_UPDATE_STAT(widget, neighbour_checks);
1109 if (path->weak || path->is_supply)
1115 trace_snd_soc_dapm_path(widget, dir, path);
1117 if (path->connect) {
1119 con += fn(path->node[dir], list, custom_stop_condition);
1124 widget->endpoints[dir] = con;
1130 * Recursively check for a completed path to an active or physically connected
1131 * output widget. Returns number of complete paths.
1133 * Optionally, can be supplied with a function acting as a stopping condition.
1134 * This function takes the dapm widget currently being examined and the walk
1135 * direction as an arguments, it should return true if the walk should be
1136 * stopped and false otherwise.
1138 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1139 struct list_head *list,
1140 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1141 enum snd_soc_dapm_direction))
1143 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1144 is_connected_output_ep, custom_stop_condition);
1148 * Recursively check for a completed path to an active or physically connected
1149 * input widget. Returns number of complete paths.
1151 * Optionally, can be supplied with a function acting as a stopping condition.
1152 * This function takes the dapm widget currently being examined and the walk
1153 * direction as an arguments, it should return true if the walk should be
1154 * stopped and false otherwise.
1156 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1157 struct list_head *list,
1158 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1159 enum snd_soc_dapm_direction))
1161 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1162 is_connected_input_ep, custom_stop_condition);
1166 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1167 * @dai: the soc DAI.
1168 * @stream: stream direction.
1169 * @list: list of active widgets for this stream.
1170 * @custom_stop_condition: (optional) a function meant to stop the widget graph
1171 * walk based on custom logic.
1173 * Queries DAPM graph as to whether a valid audio stream path exists for
1174 * the initial stream specified by name. This takes into account
1175 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1177 * Optionally, can be supplied with a function acting as a stopping condition.
1178 * This function takes the dapm widget currently being examined and the walk
1179 * direction as an arguments, it should return true if the walk should be
1180 * stopped and false otherwise.
1182 * Returns the number of valid paths or negative error.
1184 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1185 struct snd_soc_dapm_widget_list **list,
1186 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1187 enum snd_soc_dapm_direction))
1189 struct snd_soc_card *card = dai->component->card;
1190 struct snd_soc_dapm_widget *w;
1195 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1198 * For is_connected_{output,input}_ep fully discover the graph we need
1199 * to reset the cached number of inputs and outputs.
1201 list_for_each_entry(w, &card->widgets, list) {
1202 w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
1203 w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
1206 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1207 paths = is_connected_output_ep(dai->playback_widget, &widgets,
1208 custom_stop_condition);
1210 paths = is_connected_input_ep(dai->capture_widget, &widgets,
1211 custom_stop_condition);
1213 /* Drop starting point */
1214 list_del(widgets.next);
1216 ret = dapm_widget_list_create(list, &widgets);
1220 trace_snd_soc_dapm_connected(paths, stream);
1221 mutex_unlock(&card->dapm_mutex);
1227 * Handler for regulator supply widget.
1229 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1230 struct snd_kcontrol *kcontrol, int event)
1234 soc_dapm_async_complete(w->dapm);
1236 if (SND_SOC_DAPM_EVENT_ON(event)) {
1237 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1238 ret = regulator_allow_bypass(w->regulator, false);
1240 dev_warn(w->dapm->dev,
1241 "ASoC: Failed to unbypass %s: %d\n",
1245 return regulator_enable(w->regulator);
1247 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1248 ret = regulator_allow_bypass(w->regulator, true);
1250 dev_warn(w->dapm->dev,
1251 "ASoC: Failed to bypass %s: %d\n",
1255 return regulator_disable_deferred(w->regulator, w->shift);
1258 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1261 * Handler for clock supply widget.
1263 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1264 struct snd_kcontrol *kcontrol, int event)
1269 soc_dapm_async_complete(w->dapm);
1271 #ifdef CONFIG_HAVE_CLK
1272 if (SND_SOC_DAPM_EVENT_ON(event)) {
1273 return clk_prepare_enable(w->clk);
1275 clk_disable_unprepare(w->clk);
1281 EXPORT_SYMBOL_GPL(dapm_clock_event);
1283 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1285 if (w->power_checked)
1286 return w->new_power;
1291 w->new_power = w->power_check(w);
1293 w->power_checked = true;
1295 return w->new_power;
1298 /* Generic check to see if a widget should be powered. */
1299 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1303 DAPM_UPDATE_STAT(w, power_checks);
1305 in = is_connected_input_ep(w, NULL, NULL);
1306 out = is_connected_output_ep(w, NULL, NULL);
1307 return out != 0 && in != 0;
1310 /* Check to see if a power supply is needed */
1311 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1313 struct snd_soc_dapm_path *path;
1315 DAPM_UPDATE_STAT(w, power_checks);
1317 /* Check if one of our outputs is connected */
1318 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1319 DAPM_UPDATE_STAT(w, neighbour_checks);
1324 if (path->connected &&
1325 !path->connected(path->source, path->sink))
1328 if (dapm_widget_power_check(path->sink))
1335 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1337 return w->connected;
1340 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1341 struct snd_soc_dapm_widget *b,
1349 sort = dapm_down_seq;
1351 if (sort[a->id] != sort[b->id])
1352 return sort[a->id] - sort[b->id];
1353 if (a->subseq != b->subseq) {
1355 return a->subseq - b->subseq;
1357 return b->subseq - a->subseq;
1359 if (a->reg != b->reg)
1360 return a->reg - b->reg;
1361 if (a->dapm != b->dapm)
1362 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1367 /* Insert a widget in order into a DAPM power sequence. */
1368 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1369 struct list_head *list,
1372 struct snd_soc_dapm_widget *w;
1374 list_for_each_entry(w, list, power_list)
1375 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1376 list_add_tail(&new_widget->power_list, &w->power_list);
1380 list_add_tail(&new_widget->power_list, list);
1383 static void dapm_seq_check_event(struct snd_soc_card *card,
1384 struct snd_soc_dapm_widget *w, int event)
1386 const char *ev_name;
1390 case SND_SOC_DAPM_PRE_PMU:
1391 ev_name = "PRE_PMU";
1394 case SND_SOC_DAPM_POST_PMU:
1395 ev_name = "POST_PMU";
1398 case SND_SOC_DAPM_PRE_PMD:
1399 ev_name = "PRE_PMD";
1402 case SND_SOC_DAPM_POST_PMD:
1403 ev_name = "POST_PMD";
1406 case SND_SOC_DAPM_WILL_PMU:
1407 ev_name = "WILL_PMU";
1410 case SND_SOC_DAPM_WILL_PMD:
1411 ev_name = "WILL_PMD";
1415 WARN(1, "Unknown event %d\n", event);
1419 if (w->new_power != power)
1422 if (w->event && (w->event_flags & event)) {
1423 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1425 soc_dapm_async_complete(w->dapm);
1426 trace_snd_soc_dapm_widget_event_start(w, event);
1427 ret = w->event(w, NULL, event);
1428 trace_snd_soc_dapm_widget_event_done(w, event);
1430 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1431 ev_name, w->name, ret);
1435 /* Apply the coalesced changes from a DAPM sequence */
1436 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1437 struct list_head *pending)
1439 struct snd_soc_dapm_context *dapm;
1440 struct snd_soc_dapm_widget *w;
1442 unsigned int value = 0;
1443 unsigned int mask = 0;
1445 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1449 list_for_each_entry(w, pending, power_list) {
1450 WARN_ON(reg != w->reg || dapm != w->dapm);
1451 w->power = w->new_power;
1453 mask |= w->mask << w->shift;
1455 value |= w->on_val << w->shift;
1457 value |= w->off_val << w->shift;
1459 pop_dbg(dapm->dev, card->pop_time,
1460 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1461 w->name, reg, value, mask);
1463 /* Check for events */
1464 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1465 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1469 /* Any widget will do, they should all be updating the
1473 pop_dbg(dapm->dev, card->pop_time,
1474 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1475 value, mask, reg, card->pop_time);
1476 pop_wait(card->pop_time);
1477 soc_dapm_update_bits(dapm, reg, mask, value);
1480 list_for_each_entry(w, pending, power_list) {
1481 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1482 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1486 /* Apply a DAPM power sequence.
1488 * We walk over a pre-sorted list of widgets to apply power to. In
1489 * order to minimise the number of writes to the device required
1490 * multiple widgets will be updated in a single write where possible.
1491 * Currently anything that requires more than a single write is not
1494 static void dapm_seq_run(struct snd_soc_card *card,
1495 struct list_head *list, int event, bool power_up)
1497 struct snd_soc_dapm_widget *w, *n;
1498 struct snd_soc_dapm_context *d;
1501 int cur_subseq = -1;
1502 int cur_reg = SND_SOC_NOPM;
1503 struct snd_soc_dapm_context *cur_dapm = NULL;
1510 sort = dapm_down_seq;
1512 list_for_each_entry_safe(w, n, list, power_list) {
1515 /* Do we need to apply any queued changes? */
1516 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1517 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1518 if (!list_empty(&pending))
1519 dapm_seq_run_coalesced(card, &pending);
1521 if (cur_dapm && cur_dapm->seq_notifier) {
1522 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1523 if (sort[i] == cur_sort)
1524 cur_dapm->seq_notifier(cur_dapm,
1529 if (cur_dapm && w->dapm != cur_dapm)
1530 soc_dapm_async_complete(cur_dapm);
1532 INIT_LIST_HEAD(&pending);
1534 cur_subseq = INT_MIN;
1535 cur_reg = SND_SOC_NOPM;
1540 case snd_soc_dapm_pre:
1542 list_for_each_entry_safe_continue(w, n, list,
1545 if (event == SND_SOC_DAPM_STREAM_START)
1547 NULL, SND_SOC_DAPM_PRE_PMU);
1548 else if (event == SND_SOC_DAPM_STREAM_STOP)
1550 NULL, SND_SOC_DAPM_PRE_PMD);
1553 case snd_soc_dapm_post:
1555 list_for_each_entry_safe_continue(w, n, list,
1558 if (event == SND_SOC_DAPM_STREAM_START)
1560 NULL, SND_SOC_DAPM_POST_PMU);
1561 else if (event == SND_SOC_DAPM_STREAM_STOP)
1563 NULL, SND_SOC_DAPM_POST_PMD);
1567 /* Queue it up for application */
1568 cur_sort = sort[w->id];
1569 cur_subseq = w->subseq;
1572 list_move(&w->power_list, &pending);
1577 dev_err(w->dapm->dev,
1578 "ASoC: Failed to apply widget power: %d\n", ret);
1581 if (!list_empty(&pending))
1582 dapm_seq_run_coalesced(card, &pending);
1584 if (cur_dapm && cur_dapm->seq_notifier) {
1585 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1586 if (sort[i] == cur_sort)
1587 cur_dapm->seq_notifier(cur_dapm,
1591 list_for_each_entry(d, &card->dapm_list, list) {
1592 soc_dapm_async_complete(d);
1596 static void dapm_widget_update(struct snd_soc_card *card)
1598 struct snd_soc_dapm_update *update = card->update;
1599 struct snd_soc_dapm_widget_list *wlist;
1600 struct snd_soc_dapm_widget *w = NULL;
1604 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1607 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1609 for (wi = 0; wi < wlist->num_widgets; wi++) {
1610 w = wlist->widgets[wi];
1612 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1613 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1615 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1623 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1626 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1629 if (update->has_second_set) {
1630 ret = soc_dapm_update_bits(w->dapm, update->reg2,
1631 update->mask2, update->val2);
1633 dev_err(w->dapm->dev,
1634 "ASoC: %s DAPM update failed: %d\n",
1638 for (wi = 0; wi < wlist->num_widgets; wi++) {
1639 w = wlist->widgets[wi];
1641 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1642 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1644 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1650 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1651 * they're changing state.
1653 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1655 struct snd_soc_dapm_context *d = data;
1658 /* If we're off and we're not supposed to go into STANDBY */
1659 if (d->bias_level == SND_SOC_BIAS_OFF &&
1660 d->target_bias_level != SND_SOC_BIAS_OFF) {
1662 pm_runtime_get_sync(d->dev);
1664 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1667 "ASoC: Failed to turn on bias: %d\n", ret);
1670 /* Prepare for a transition to ON or away from ON */
1671 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1672 d->bias_level != SND_SOC_BIAS_ON) ||
1673 (d->target_bias_level != SND_SOC_BIAS_ON &&
1674 d->bias_level == SND_SOC_BIAS_ON)) {
1675 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1678 "ASoC: Failed to prepare bias: %d\n", ret);
1682 /* Async callback run prior to DAPM sequences - brings to their final
1685 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1687 struct snd_soc_dapm_context *d = data;
1690 /* If we just powered the last thing off drop to standby bias */
1691 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1692 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1693 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1694 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1696 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1700 /* If we're in standby and can support bias off then do that */
1701 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1702 d->target_bias_level == SND_SOC_BIAS_OFF) {
1703 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1705 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1709 pm_runtime_put(d->dev);
1712 /* If we just powered up then move to active bias */
1713 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1714 d->target_bias_level == SND_SOC_BIAS_ON) {
1715 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1717 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1722 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1723 bool power, bool connect)
1725 /* If a connection is being made or broken then that update
1726 * will have marked the peer dirty, otherwise the widgets are
1727 * not connected and this update has no impact. */
1731 /* If the peer is already in the state we're moving to then we
1732 * won't have an impact on it. */
1733 if (power != peer->power)
1734 dapm_mark_dirty(peer, "peer state change");
1737 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1738 struct list_head *up_list,
1739 struct list_head *down_list)
1741 struct snd_soc_dapm_path *path;
1743 if (w->power == power)
1746 trace_snd_soc_dapm_widget_power(w, power);
1748 /* If we changed our power state perhaps our neigbours changed
1751 snd_soc_dapm_widget_for_each_source_path(w, path)
1752 dapm_widget_set_peer_power(path->source, power, path->connect);
1754 /* Supplies can't affect their outputs, only their inputs */
1755 if (!w->is_supply) {
1756 snd_soc_dapm_widget_for_each_sink_path(w, path)
1757 dapm_widget_set_peer_power(path->sink, power,
1762 dapm_seq_insert(w, up_list, true);
1764 dapm_seq_insert(w, down_list, false);
1767 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1768 struct list_head *up_list,
1769 struct list_head *down_list)
1774 case snd_soc_dapm_pre:
1775 dapm_seq_insert(w, down_list, false);
1777 case snd_soc_dapm_post:
1778 dapm_seq_insert(w, up_list, true);
1782 power = dapm_widget_power_check(w);
1784 dapm_widget_set_power(w, power, up_list, down_list);
1789 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1791 if (dapm->idle_bias_off)
1794 switch (snd_power_get_state(dapm->card->snd_card)) {
1795 case SNDRV_CTL_POWER_D3hot:
1796 case SNDRV_CTL_POWER_D3cold:
1797 return dapm->suspend_bias_off;
1806 * Scan each dapm widget for complete audio path.
1807 * A complete path is a route that has valid endpoints i.e.:-
1809 * o DAC to output pin.
1810 * o Input pin to ADC.
1811 * o Input pin to Output pin (bypass, sidetone)
1812 * o DAC to ADC (loopback).
1814 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1816 struct snd_soc_dapm_widget *w;
1817 struct snd_soc_dapm_context *d;
1819 LIST_HEAD(down_list);
1820 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1821 enum snd_soc_bias_level bias;
1823 lockdep_assert_held(&card->dapm_mutex);
1825 trace_snd_soc_dapm_start(card);
1827 list_for_each_entry(d, &card->dapm_list, list) {
1828 if (dapm_idle_bias_off(d))
1829 d->target_bias_level = SND_SOC_BIAS_OFF;
1831 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1836 /* Check which widgets we need to power and store them in
1837 * lists indicating if they should be powered up or down. We
1838 * only check widgets that have been flagged as dirty but note
1839 * that new widgets may be added to the dirty list while we
1842 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1843 dapm_power_one_widget(w, &up_list, &down_list);
1846 list_for_each_entry(w, &card->widgets, list) {
1848 case snd_soc_dapm_pre:
1849 case snd_soc_dapm_post:
1850 /* These widgets always need to be powered */
1853 list_del_init(&w->dirty);
1860 /* Supplies and micbiases only bring the
1861 * context up to STANDBY as unless something
1862 * else is active and passing audio they
1863 * generally don't require full power. Signal
1864 * generators are virtual pins and have no
1865 * power impact themselves.
1868 case snd_soc_dapm_siggen:
1869 case snd_soc_dapm_vmid:
1871 case snd_soc_dapm_supply:
1872 case snd_soc_dapm_regulator_supply:
1873 case snd_soc_dapm_clock_supply:
1874 case snd_soc_dapm_micbias:
1875 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1876 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1879 d->target_bias_level = SND_SOC_BIAS_ON;
1886 /* Force all contexts in the card to the same bias state if
1887 * they're not ground referenced.
1889 bias = SND_SOC_BIAS_OFF;
1890 list_for_each_entry(d, &card->dapm_list, list)
1891 if (d->target_bias_level > bias)
1892 bias = d->target_bias_level;
1893 list_for_each_entry(d, &card->dapm_list, list)
1894 if (!dapm_idle_bias_off(d))
1895 d->target_bias_level = bias;
1897 trace_snd_soc_dapm_walk_done(card);
1899 /* Run card bias changes at first */
1900 dapm_pre_sequence_async(&card->dapm, 0);
1901 /* Run other bias changes in parallel */
1902 list_for_each_entry(d, &card->dapm_list, list) {
1903 if (d != &card->dapm)
1904 async_schedule_domain(dapm_pre_sequence_async, d,
1907 async_synchronize_full_domain(&async_domain);
1909 list_for_each_entry(w, &down_list, power_list) {
1910 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1913 list_for_each_entry(w, &up_list, power_list) {
1914 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1917 /* Power down widgets first; try to avoid amplifying pops. */
1918 dapm_seq_run(card, &down_list, event, false);
1920 dapm_widget_update(card);
1923 dapm_seq_run(card, &up_list, event, true);
1925 /* Run all the bias changes in parallel */
1926 list_for_each_entry(d, &card->dapm_list, list) {
1927 if (d != &card->dapm)
1928 async_schedule_domain(dapm_post_sequence_async, d,
1931 async_synchronize_full_domain(&async_domain);
1932 /* Run card bias changes at last */
1933 dapm_post_sequence_async(&card->dapm, 0);
1935 /* do we need to notify any clients that DAPM event is complete */
1936 list_for_each_entry(d, &card->dapm_list, list) {
1937 if (d->stream_event)
1938 d->stream_event(d, event);
1941 pop_dbg(card->dev, card->pop_time,
1942 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1943 pop_wait(card->pop_time);
1945 trace_snd_soc_dapm_done(card);
1950 #ifdef CONFIG_DEBUG_FS
1951 static ssize_t dapm_widget_power_read_file(struct file *file,
1952 char __user *user_buf,
1953 size_t count, loff_t *ppos)
1955 struct snd_soc_dapm_widget *w = file->private_data;
1956 struct snd_soc_card *card = w->dapm->card;
1957 enum snd_soc_dapm_direction dir, rdir;
1961 struct snd_soc_dapm_path *p = NULL;
1963 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1967 mutex_lock(&card->dapm_mutex);
1969 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1974 in = is_connected_input_ep(w, NULL, NULL);
1975 out = is_connected_output_ep(w, NULL, NULL);
1978 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1979 w->name, w->power ? "On" : "Off",
1980 w->force ? " (forced)" : "", in, out);
1983 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1984 " - R%d(0x%x) mask 0x%x",
1985 w->reg, w->reg, w->mask << w->shift);
1987 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1990 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1992 w->active ? "active" : "inactive");
1994 snd_soc_dapm_for_each_direction(dir) {
1995 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1996 snd_soc_dapm_widget_for_each_path(w, dir, p) {
1997 if (p->connected && !p->connected(w, p->node[rdir]))
2003 ret += snprintf(buf + ret, PAGE_SIZE - ret,
2004 " %s \"%s\" \"%s\"\n",
2005 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
2006 p->name ? p->name : "static",
2007 p->node[rdir]->name);
2011 mutex_unlock(&card->dapm_mutex);
2013 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2019 static const struct file_operations dapm_widget_power_fops = {
2020 .open = simple_open,
2021 .read = dapm_widget_power_read_file,
2022 .llseek = default_llseek,
2025 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2026 size_t count, loff_t *ppos)
2028 struct snd_soc_dapm_context *dapm = file->private_data;
2031 switch (dapm->bias_level) {
2032 case SND_SOC_BIAS_ON:
2035 case SND_SOC_BIAS_PREPARE:
2036 level = "Prepare\n";
2038 case SND_SOC_BIAS_STANDBY:
2039 level = "Standby\n";
2041 case SND_SOC_BIAS_OFF:
2045 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2046 level = "Unknown\n";
2050 return simple_read_from_buffer(user_buf, count, ppos, level,
2054 static const struct file_operations dapm_bias_fops = {
2055 .open = simple_open,
2056 .read = dapm_bias_read_file,
2057 .llseek = default_llseek,
2060 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2061 struct dentry *parent)
2068 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2070 if (!dapm->debugfs_dapm) {
2072 "ASoC: Failed to create DAPM debugfs directory\n");
2076 d = debugfs_create_file("bias_level", 0444,
2077 dapm->debugfs_dapm, dapm,
2081 "ASoC: Failed to create bias level debugfs file\n");
2084 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2086 struct snd_soc_dapm_context *dapm = w->dapm;
2089 if (!dapm->debugfs_dapm || !w->name)
2092 d = debugfs_create_file(w->name, 0444,
2093 dapm->debugfs_dapm, w,
2094 &dapm_widget_power_fops);
2096 dev_warn(w->dapm->dev,
2097 "ASoC: Failed to create %s debugfs file\n",
2101 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2103 debugfs_remove_recursive(dapm->debugfs_dapm);
2107 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2108 struct dentry *parent)
2112 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2116 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2123 * soc_dapm_connect_path() - Connects or disconnects a path
2124 * @path: The path to update
2125 * @connect: The new connect state of the path. True if the path is connected,
2126 * false if it is disconnected.
2127 * @reason: The reason why the path changed (for debugging only)
2129 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2130 bool connect, const char *reason)
2132 if (path->connect == connect)
2135 path->connect = connect;
2136 dapm_mark_dirty(path->source, reason);
2137 dapm_mark_dirty(path->sink, reason);
2138 dapm_path_invalidate(path);
2141 /* test and update the power status of a mux widget */
2142 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2143 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2145 struct snd_soc_dapm_path *path;
2149 lockdep_assert_held(&card->dapm_mutex);
2151 /* find dapm widget path assoc with kcontrol */
2152 dapm_kcontrol_for_each_path(path, kcontrol) {
2154 /* we now need to match the string in the enum to the path */
2155 if (!(strcmp(path->name, e->texts[mux])))
2160 soc_dapm_connect_path(path, connect, "mux update");
2164 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2169 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2170 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2171 struct snd_soc_dapm_update *update)
2173 struct snd_soc_card *card = dapm->card;
2176 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2177 card->update = update;
2178 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2179 card->update = NULL;
2180 mutex_unlock(&card->dapm_mutex);
2182 soc_dpcm_runtime_update(card);
2185 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2187 /* test and update the power status of a mixer or switch widget */
2188 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2189 struct snd_kcontrol *kcontrol, int connect)
2191 struct snd_soc_dapm_path *path;
2194 lockdep_assert_held(&card->dapm_mutex);
2196 /* find dapm widget path assoc with kcontrol */
2197 dapm_kcontrol_for_each_path(path, kcontrol) {
2199 soc_dapm_connect_path(path, connect, "mixer update");
2203 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2208 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2209 struct snd_kcontrol *kcontrol, int connect,
2210 struct snd_soc_dapm_update *update)
2212 struct snd_soc_card *card = dapm->card;
2215 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2216 card->update = update;
2217 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2218 card->update = NULL;
2219 mutex_unlock(&card->dapm_mutex);
2221 soc_dpcm_runtime_update(card);
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2226 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2229 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2230 struct snd_soc_dapm_widget *w;
2232 char *state = "not set";
2234 /* card won't be set for the dummy component, as a spot fix
2235 * we're checking for that case specifically here but in future
2236 * we will ensure that the dummy component looks like others.
2241 list_for_each_entry(w, &cmpnt->card->widgets, list) {
2242 if (w->dapm != dapm)
2245 /* only display widgets that burn power */
2247 case snd_soc_dapm_hp:
2248 case snd_soc_dapm_mic:
2249 case snd_soc_dapm_spk:
2250 case snd_soc_dapm_line:
2251 case snd_soc_dapm_micbias:
2252 case snd_soc_dapm_dac:
2253 case snd_soc_dapm_adc:
2254 case snd_soc_dapm_pga:
2255 case snd_soc_dapm_out_drv:
2256 case snd_soc_dapm_mixer:
2257 case snd_soc_dapm_mixer_named_ctl:
2258 case snd_soc_dapm_supply:
2259 case snd_soc_dapm_regulator_supply:
2260 case snd_soc_dapm_clock_supply:
2262 count += sprintf(buf + count, "%s: %s\n",
2263 w->name, w->power ? "On":"Off");
2270 switch (snd_soc_dapm_get_bias_level(dapm)) {
2271 case SND_SOC_BIAS_ON:
2274 case SND_SOC_BIAS_PREPARE:
2277 case SND_SOC_BIAS_STANDBY:
2280 case SND_SOC_BIAS_OFF:
2284 count += sprintf(buf + count, "PM State: %s\n", state);
2289 /* show dapm widget status in sys fs */
2290 static ssize_t dapm_widget_show(struct device *dev,
2291 struct device_attribute *attr, char *buf)
2293 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2296 mutex_lock(&rtd->card->dapm_mutex);
2298 for (i = 0; i < rtd->num_codecs; i++) {
2299 struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
2301 count += dapm_widget_show_component(cmpnt, buf + count);
2304 mutex_unlock(&rtd->card->dapm_mutex);
2309 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2311 struct attribute *soc_dapm_dev_attrs[] = {
2312 &dev_attr_dapm_widget.attr,
2316 static void dapm_free_path(struct snd_soc_dapm_path *path)
2318 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2319 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2320 list_del(&path->list_kcontrol);
2321 list_del(&path->list);
2325 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2327 struct snd_soc_dapm_path *p, *next_p;
2328 enum snd_soc_dapm_direction dir;
2332 * remove source and sink paths associated to this widget.
2333 * While removing the path, remove reference to it from both
2334 * source and sink widgets so that path is removed only once.
2336 snd_soc_dapm_for_each_direction(dir) {
2337 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2341 kfree(w->kcontrols);
2342 kfree_const(w->name);
2346 void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
2348 dapm->path_sink_cache.widget = NULL;
2349 dapm->path_source_cache.widget = NULL;
2352 /* free all dapm widgets and resources */
2353 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2355 struct snd_soc_dapm_widget *w, *next_w;
2357 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2358 if (w->dapm != dapm)
2360 snd_soc_dapm_free_widget(w);
2362 snd_soc_dapm_reset_cache(dapm);
2365 static struct snd_soc_dapm_widget *dapm_find_widget(
2366 struct snd_soc_dapm_context *dapm, const char *pin,
2367 bool search_other_contexts)
2369 struct snd_soc_dapm_widget *w;
2370 struct snd_soc_dapm_widget *fallback = NULL;
2372 list_for_each_entry(w, &dapm->card->widgets, list) {
2373 if (!strcmp(w->name, pin)) {
2374 if (w->dapm == dapm)
2381 if (search_other_contexts)
2387 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2388 const char *pin, int status)
2390 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2392 dapm_assert_locked(dapm);
2395 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2399 if (w->connected != status) {
2400 dapm_mark_dirty(w, "pin configuration");
2401 dapm_widget_invalidate_input_paths(w);
2402 dapm_widget_invalidate_output_paths(w);
2405 w->connected = status;
2413 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2414 * @dapm: DAPM context
2416 * Walks all dapm audio paths and powers widgets according to their
2417 * stream or path usage.
2419 * Requires external locking.
2421 * Returns 0 for success.
2423 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2426 * Suppress early reports (eg, jacks syncing their state) to avoid
2427 * silly DAPM runs during card startup.
2429 if (!dapm->card || !dapm->card->instantiated)
2432 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2434 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2437 * snd_soc_dapm_sync - scan and power dapm paths
2438 * @dapm: DAPM context
2440 * Walks all dapm audio paths and powers widgets according to their
2441 * stream or path usage.
2443 * Returns 0 for success.
2445 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2449 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2450 ret = snd_soc_dapm_sync_unlocked(dapm);
2451 mutex_unlock(&dapm->card->dapm_mutex);
2454 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2457 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2458 * @w: The widget for which to update the flags
2460 * Some widgets have a dynamic category which depends on which neighbors they
2461 * are connected to. This function update the category for these widgets.
2463 * This function must be called whenever a path is added or removed to a widget.
2465 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2467 enum snd_soc_dapm_direction dir;
2468 struct snd_soc_dapm_path *p;
2472 case snd_soc_dapm_input:
2473 /* On a fully routed card an input is never a source */
2474 if (w->dapm->card->fully_routed)
2476 ep = SND_SOC_DAPM_EP_SOURCE;
2477 snd_soc_dapm_widget_for_each_source_path(w, p) {
2478 if (p->source->id == snd_soc_dapm_micbias ||
2479 p->source->id == snd_soc_dapm_mic ||
2480 p->source->id == snd_soc_dapm_line ||
2481 p->source->id == snd_soc_dapm_output) {
2487 case snd_soc_dapm_output:
2488 /* On a fully routed card a output is never a sink */
2489 if (w->dapm->card->fully_routed)
2491 ep = SND_SOC_DAPM_EP_SINK;
2492 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2493 if (p->sink->id == snd_soc_dapm_spk ||
2494 p->sink->id == snd_soc_dapm_hp ||
2495 p->sink->id == snd_soc_dapm_line ||
2496 p->sink->id == snd_soc_dapm_input) {
2502 case snd_soc_dapm_line:
2504 snd_soc_dapm_for_each_direction(dir) {
2505 if (!list_empty(&w->edges[dir]))
2506 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2516 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2517 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2518 const char *control)
2520 bool dynamic_source = false;
2521 bool dynamic_sink = false;
2526 switch (source->id) {
2527 case snd_soc_dapm_demux:
2528 dynamic_source = true;
2535 case snd_soc_dapm_mux:
2536 case snd_soc_dapm_switch:
2537 case snd_soc_dapm_mixer:
2538 case snd_soc_dapm_mixer_named_ctl:
2539 dynamic_sink = true;
2545 if (dynamic_source && dynamic_sink) {
2547 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2548 source->name, control, sink->name);
2550 } else if (!dynamic_source && !dynamic_sink) {
2552 "Control not supported for path %s -> [%s] -> %s\n",
2553 source->name, control, sink->name);
2560 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2561 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2562 const char *control,
2563 int (*connected)(struct snd_soc_dapm_widget *source,
2564 struct snd_soc_dapm_widget *sink))
2566 struct snd_soc_dapm_widget *widgets[2];
2567 enum snd_soc_dapm_direction dir;
2568 struct snd_soc_dapm_path *path;
2571 if (wsink->is_supply && !wsource->is_supply) {
2573 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2574 wsource->name, wsink->name);
2578 if (connected && !wsource->is_supply) {
2580 "connected() callback only supported for supply widgets (%s -> %s)\n",
2581 wsource->name, wsink->name);
2585 if (wsource->is_supply && control) {
2587 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2588 wsource->name, control, wsink->name);
2592 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2596 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2600 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2601 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2602 widgets[SND_SOC_DAPM_DIR_IN] = wsource;
2603 widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
2605 path->connected = connected;
2606 INIT_LIST_HEAD(&path->list);
2607 INIT_LIST_HEAD(&path->list_kcontrol);
2609 if (wsource->is_supply || wsink->is_supply)
2610 path->is_supply = 1;
2612 /* connect static paths */
2613 if (control == NULL) {
2616 switch (wsource->id) {
2617 case snd_soc_dapm_demux:
2618 ret = dapm_connect_mux(dapm, path, control, wsource);
2626 switch (wsink->id) {
2627 case snd_soc_dapm_mux:
2628 ret = dapm_connect_mux(dapm, path, control, wsink);
2632 case snd_soc_dapm_switch:
2633 case snd_soc_dapm_mixer:
2634 case snd_soc_dapm_mixer_named_ctl:
2635 ret = dapm_connect_mixer(dapm, path, control);
2644 list_add(&path->list, &dapm->card->paths);
2645 snd_soc_dapm_for_each_direction(dir)
2646 list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
2648 snd_soc_dapm_for_each_direction(dir) {
2649 dapm_update_widget_flags(widgets[dir]);
2650 dapm_mark_dirty(widgets[dir], "Route added");
2653 if (dapm->card->instantiated && path->connect)
2654 dapm_path_invalidate(path);
2662 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2663 const struct snd_soc_dapm_route *route)
2665 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2666 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2669 char prefixed_sink[80];
2670 char prefixed_source[80];
2674 prefix = soc_dapm_prefix(dapm);
2676 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2677 prefix, route->sink);
2678 sink = prefixed_sink;
2679 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2680 prefix, route->source);
2681 source = prefixed_source;
2684 source = route->source;
2687 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2688 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2690 if (wsink && wsource)
2694 * find src and dest widgets over all widgets but favor a widget from
2695 * current DAPM context
2697 list_for_each_entry(w, &dapm->card->widgets, list) {
2698 if (!wsink && !(strcmp(w->name, sink))) {
2700 if (w->dapm == dapm) {
2707 if (!wsource && !(strcmp(w->name, source))) {
2709 if (w->dapm == dapm) {
2716 /* use widget from another DAPM context if not found from this */
2722 if (wsource == NULL) {
2723 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2727 if (wsink == NULL) {
2728 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2734 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2735 dapm_wcache_update(&dapm->path_source_cache, wsource);
2737 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2744 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2745 source, route->control, sink);
2749 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2750 const struct snd_soc_dapm_route *route)
2752 struct snd_soc_dapm_widget *wsource, *wsink;
2753 struct snd_soc_dapm_path *path, *p;
2756 char prefixed_sink[80];
2757 char prefixed_source[80];
2760 if (route->control) {
2762 "ASoC: Removal of routes with controls not supported\n");
2766 prefix = soc_dapm_prefix(dapm);
2768 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2769 prefix, route->sink);
2770 sink = prefixed_sink;
2771 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2772 prefix, route->source);
2773 source = prefixed_source;
2776 source = route->source;
2780 list_for_each_entry(p, &dapm->card->paths, list) {
2781 if (strcmp(p->source->name, source) != 0)
2783 if (strcmp(p->sink->name, sink) != 0)
2790 wsource = path->source;
2793 dapm_mark_dirty(wsource, "Route removed");
2794 dapm_mark_dirty(wsink, "Route removed");
2796 dapm_path_invalidate(path);
2798 dapm_free_path(path);
2800 /* Update any path related flags */
2801 dapm_update_widget_flags(wsource);
2802 dapm_update_widget_flags(wsink);
2804 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2812 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2813 * @dapm: DAPM context
2814 * @route: audio routes
2815 * @num: number of routes
2817 * Connects 2 dapm widgets together via a named audio path. The sink is
2818 * the widget receiving the audio signal, whilst the source is the sender
2819 * of the audio signal.
2821 * Returns 0 for success else error. On error all resources can be freed
2822 * with a call to snd_soc_card_free().
2824 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2825 const struct snd_soc_dapm_route *route, int num)
2829 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2830 for (i = 0; i < num; i++) {
2831 r = snd_soc_dapm_add_route(dapm, route);
2833 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2835 route->control ? route->control : "direct",
2841 mutex_unlock(&dapm->card->dapm_mutex);
2845 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2848 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2849 * @dapm: DAPM context
2850 * @route: audio routes
2851 * @num: number of routes
2853 * Removes routes from the DAPM context.
2855 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2856 const struct snd_soc_dapm_route *route, int num)
2860 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2861 for (i = 0; i < num; i++) {
2862 snd_soc_dapm_del_route(dapm, route);
2865 mutex_unlock(&dapm->card->dapm_mutex);
2869 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2871 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2872 const struct snd_soc_dapm_route *route)
2874 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2877 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2880 struct snd_soc_dapm_path *path;
2884 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2890 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2895 if (route->control || route->connected)
2896 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2897 route->source, route->sink);
2899 snd_soc_dapm_widget_for_each_sink_path(source, path) {
2900 if (path->sink == sink) {
2907 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2908 route->source, route->sink);
2910 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2911 count, route->source, route->sink);
2917 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2918 * @dapm: DAPM context
2919 * @route: audio routes
2920 * @num: number of routes
2922 * Mark existing routes matching those specified in the passed array
2923 * as being weak, meaning that they are ignored for the purpose of
2924 * power decisions. The main intended use case is for sidetone paths
2925 * which couple audio between other independent paths if they are both
2926 * active in order to make the combination work better at the user
2927 * level but which aren't intended to be "used".
2929 * Note that CODEC drivers should not use this as sidetone type paths
2930 * can frequently also be used as bypass paths.
2932 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2933 const struct snd_soc_dapm_route *route, int num)
2938 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2939 for (i = 0; i < num; i++) {
2940 err = snd_soc_dapm_weak_route(dapm, route);
2945 mutex_unlock(&dapm->card->dapm_mutex);
2949 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2952 * snd_soc_dapm_new_widgets - add new dapm widgets
2953 * @card: card to be checked for new dapm widgets
2955 * Checks the codec for any new dapm widgets and creates them if found.
2957 * Returns 0 for success.
2959 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2961 struct snd_soc_dapm_widget *w;
2964 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2966 list_for_each_entry(w, &card->widgets, list)
2971 if (w->num_kcontrols) {
2972 w->kcontrols = kzalloc(w->num_kcontrols *
2973 sizeof(struct snd_kcontrol *),
2975 if (!w->kcontrols) {
2976 mutex_unlock(&card->dapm_mutex);
2982 case snd_soc_dapm_switch:
2983 case snd_soc_dapm_mixer:
2984 case snd_soc_dapm_mixer_named_ctl:
2987 case snd_soc_dapm_mux:
2988 case snd_soc_dapm_demux:
2991 case snd_soc_dapm_pga:
2992 case snd_soc_dapm_out_drv:
2995 case snd_soc_dapm_dai_link:
2996 dapm_new_dai_link(w);
3002 /* Read the initial power state from the device */
3004 soc_dapm_read(w->dapm, w->reg, &val);
3005 val = val >> w->shift;
3007 if (val == w->on_val)
3013 dapm_mark_dirty(w, "new widget");
3014 dapm_debugfs_add_widget(w);
3017 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
3018 mutex_unlock(&card->dapm_mutex);
3021 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
3024 * snd_soc_dapm_get_volsw - dapm mixer get callback
3025 * @kcontrol: mixer control
3026 * @ucontrol: control element information
3028 * Callback to get the value of a dapm mixer control.
3030 * Returns 0 for success.
3032 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3033 struct snd_ctl_elem_value *ucontrol)
3035 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3036 struct snd_soc_card *card = dapm->card;
3037 struct soc_mixer_control *mc =
3038 (struct soc_mixer_control *)kcontrol->private_value;
3040 unsigned int shift = mc->shift;
3042 unsigned int mask = (1 << fls(max)) - 1;
3043 unsigned int invert = mc->invert;
3047 if (snd_soc_volsw_is_stereo(mc))
3049 "ASoC: Control '%s' is stereo, which is not supported\n",
3052 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3053 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3054 ret = soc_dapm_read(dapm, reg, &val);
3055 val = (val >> shift) & mask;
3057 val = dapm_kcontrol_get_value(kcontrol);
3059 mutex_unlock(&card->dapm_mutex);
3065 ucontrol->value.integer.value[0] = max - val;
3067 ucontrol->value.integer.value[0] = val;
3071 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3074 * snd_soc_dapm_put_volsw - dapm mixer set callback
3075 * @kcontrol: mixer control
3076 * @ucontrol: control element information
3078 * Callback to set the value of a dapm mixer control.
3080 * Returns 0 for success.
3082 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3083 struct snd_ctl_elem_value *ucontrol)
3085 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3086 struct snd_soc_card *card = dapm->card;
3087 struct soc_mixer_control *mc =
3088 (struct soc_mixer_control *)kcontrol->private_value;
3090 unsigned int shift = mc->shift;
3092 unsigned int mask = (1 << fls(max)) - 1;
3093 unsigned int invert = mc->invert;
3095 int connect, change, reg_change = 0;
3096 struct snd_soc_dapm_update update = { NULL };
3099 if (snd_soc_volsw_is_stereo(mc))
3101 "ASoC: Control '%s' is stereo, which is not supported\n",
3104 val = (ucontrol->value.integer.value[0] & mask);
3110 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3112 change = dapm_kcontrol_set_value(kcontrol, val);
3114 if (reg != SND_SOC_NOPM) {
3115 mask = mask << shift;
3118 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3121 if (change || reg_change) {
3123 update.kcontrol = kcontrol;
3127 card->update = &update;
3129 change |= reg_change;
3131 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3133 card->update = NULL;
3136 mutex_unlock(&card->dapm_mutex);
3139 soc_dpcm_runtime_update(card);
3143 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3146 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3147 * @kcontrol: mixer control
3148 * @ucontrol: control element information
3150 * Callback to get the value of a dapm enumerated double mixer control.
3152 * Returns 0 for success.
3154 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3155 struct snd_ctl_elem_value *ucontrol)
3157 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3158 struct snd_soc_card *card = dapm->card;
3159 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3160 unsigned int reg_val, val;
3162 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3163 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3164 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3166 mutex_unlock(&card->dapm_mutex);
3170 reg_val = dapm_kcontrol_get_value(kcontrol);
3172 mutex_unlock(&card->dapm_mutex);
3174 val = (reg_val >> e->shift_l) & e->mask;
3175 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3176 if (e->shift_l != e->shift_r) {
3177 val = (reg_val >> e->shift_r) & e->mask;
3178 val = snd_soc_enum_val_to_item(e, val);
3179 ucontrol->value.enumerated.item[1] = val;
3184 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3187 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3188 * @kcontrol: mixer control
3189 * @ucontrol: control element information
3191 * Callback to set the value of a dapm enumerated double mixer control.
3193 * Returns 0 for success.
3195 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3196 struct snd_ctl_elem_value *ucontrol)
3198 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3199 struct snd_soc_card *card = dapm->card;
3200 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3201 unsigned int *item = ucontrol->value.enumerated.item;
3202 unsigned int val, change, reg_change = 0;
3204 struct snd_soc_dapm_update update = { NULL };
3207 if (item[0] >= e->items)
3210 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3211 mask = e->mask << e->shift_l;
3212 if (e->shift_l != e->shift_r) {
3213 if (item[1] > e->items)
3215 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3216 mask |= e->mask << e->shift_r;
3219 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3221 change = dapm_kcontrol_set_value(kcontrol, val);
3223 if (e->reg != SND_SOC_NOPM)
3224 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3226 if (change || reg_change) {
3228 update.kcontrol = kcontrol;
3229 update.reg = e->reg;
3232 card->update = &update;
3234 change |= reg_change;
3236 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3238 card->update = NULL;
3241 mutex_unlock(&card->dapm_mutex);
3244 soc_dpcm_runtime_update(card);
3248 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3251 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3253 * @kcontrol: mixer control
3254 * @uinfo: control element information
3256 * Callback to provide information about a pin switch control.
3258 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3259 struct snd_ctl_elem_info *uinfo)
3261 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3263 uinfo->value.integer.min = 0;
3264 uinfo->value.integer.max = 1;
3268 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3271 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3273 * @kcontrol: mixer control
3276 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3277 struct snd_ctl_elem_value *ucontrol)
3279 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3280 const char *pin = (const char *)kcontrol->private_value;
3282 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3284 ucontrol->value.integer.value[0] =
3285 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3287 mutex_unlock(&card->dapm_mutex);
3291 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3294 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3296 * @kcontrol: mixer control
3299 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3300 struct snd_ctl_elem_value *ucontrol)
3302 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3303 const char *pin = (const char *)kcontrol->private_value;
3305 if (ucontrol->value.integer.value[0])
3306 snd_soc_dapm_enable_pin(&card->dapm, pin);
3308 snd_soc_dapm_disable_pin(&card->dapm, pin);
3310 snd_soc_dapm_sync(&card->dapm);
3313 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3315 struct snd_soc_dapm_widget *
3316 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3317 const struct snd_soc_dapm_widget *widget)
3319 struct snd_soc_dapm_widget *w;
3321 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3322 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3325 "ASoC: Failed to create DAPM control %s\n",
3328 mutex_unlock(&dapm->card->dapm_mutex);
3331 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
3333 struct snd_soc_dapm_widget *
3334 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3335 const struct snd_soc_dapm_widget *widget)
3337 enum snd_soc_dapm_direction dir;
3338 struct snd_soc_dapm_widget *w;
3342 if ((w = dapm_cnew_widget(widget)) == NULL)
3346 case snd_soc_dapm_regulator_supply:
3347 w->regulator = devm_regulator_get(dapm->dev, w->name);
3348 if (IS_ERR(w->regulator)) {
3349 ret = PTR_ERR(w->regulator);
3350 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3355 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3356 ret = regulator_allow_bypass(w->regulator, true);
3358 dev_warn(w->dapm->dev,
3359 "ASoC: Failed to bypass %s: %d\n",
3363 case snd_soc_dapm_clock_supply:
3364 #ifdef CONFIG_CLKDEV_LOOKUP
3365 w->clk = devm_clk_get(dapm->dev, w->name);
3366 if (IS_ERR(w->clk)) {
3367 ret = PTR_ERR(w->clk);
3368 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3380 prefix = soc_dapm_prefix(dapm);
3382 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3384 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3385 if (w->name == NULL) {
3391 case snd_soc_dapm_mic:
3392 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3393 w->power_check = dapm_generic_check_power;
3395 case snd_soc_dapm_input:
3396 if (!dapm->card->fully_routed)
3397 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3398 w->power_check = dapm_generic_check_power;
3400 case snd_soc_dapm_spk:
3401 case snd_soc_dapm_hp:
3402 w->is_ep = SND_SOC_DAPM_EP_SINK;
3403 w->power_check = dapm_generic_check_power;
3405 case snd_soc_dapm_output:
3406 if (!dapm->card->fully_routed)
3407 w->is_ep = SND_SOC_DAPM_EP_SINK;
3408 w->power_check = dapm_generic_check_power;
3410 case snd_soc_dapm_vmid:
3411 case snd_soc_dapm_siggen:
3412 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3413 w->power_check = dapm_always_on_check_power;
3415 case snd_soc_dapm_sink:
3416 w->is_ep = SND_SOC_DAPM_EP_SINK;
3417 w->power_check = dapm_always_on_check_power;
3420 case snd_soc_dapm_mux:
3421 case snd_soc_dapm_demux:
3422 case snd_soc_dapm_switch:
3423 case snd_soc_dapm_mixer:
3424 case snd_soc_dapm_mixer_named_ctl:
3425 case snd_soc_dapm_adc:
3426 case snd_soc_dapm_aif_out:
3427 case snd_soc_dapm_dac:
3428 case snd_soc_dapm_aif_in:
3429 case snd_soc_dapm_pga:
3430 case snd_soc_dapm_out_drv:
3431 case snd_soc_dapm_micbias:
3432 case snd_soc_dapm_line:
3433 case snd_soc_dapm_dai_link:
3434 case snd_soc_dapm_dai_out:
3435 case snd_soc_dapm_dai_in:
3436 w->power_check = dapm_generic_check_power;
3438 case snd_soc_dapm_supply:
3439 case snd_soc_dapm_regulator_supply:
3440 case snd_soc_dapm_clock_supply:
3441 case snd_soc_dapm_kcontrol:
3443 w->power_check = dapm_supply_check_power;
3446 w->power_check = dapm_always_on_check_power;
3451 INIT_LIST_HEAD(&w->list);
3452 INIT_LIST_HEAD(&w->dirty);
3453 list_add_tail(&w->list, &dapm->card->widgets);
3455 snd_soc_dapm_for_each_direction(dir) {
3456 INIT_LIST_HEAD(&w->edges[dir]);
3457 w->endpoints[dir] = -1;
3460 /* machine layer sets up unconnected pins and insertions */
3466 * snd_soc_dapm_new_controls - create new dapm controls
3467 * @dapm: DAPM context
3468 * @widget: widget array
3469 * @num: number of widgets
3471 * Creates new DAPM controls based upon the templates.
3473 * Returns 0 for success else error.
3475 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3476 const struct snd_soc_dapm_widget *widget,
3479 struct snd_soc_dapm_widget *w;
3483 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3484 for (i = 0; i < num; i++) {
3485 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3488 "ASoC: Failed to create DAPM control %s\n",
3495 mutex_unlock(&dapm->card->dapm_mutex);
3498 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3500 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3501 struct snd_kcontrol *kcontrol, int event)
3503 struct snd_soc_dapm_path *source_p, *sink_p;
3504 struct snd_soc_dai *source, *sink;
3505 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3506 struct snd_pcm_substream substream;
3507 struct snd_pcm_hw_params *params = NULL;
3508 struct snd_pcm_runtime *runtime = NULL;
3512 if (WARN_ON(!config) ||
3513 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3514 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3517 /* We only support a single source and sink, pick the first */
3518 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
3519 struct snd_soc_dapm_path,
3520 list_node[SND_SOC_DAPM_DIR_OUT]);
3521 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
3522 struct snd_soc_dapm_path,
3523 list_node[SND_SOC_DAPM_DIR_IN]);
3525 source = source_p->source->priv;
3526 sink = sink_p->sink->priv;
3528 /* Be a little careful as we don't want to overflow the mask array */
3529 if (config->formats) {
3530 fmt = ffs(config->formats) - 1;
3532 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3537 /* Currently very limited parameter selection */
3538 params = kzalloc(sizeof(*params), GFP_KERNEL);
3543 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3545 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3547 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3550 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3551 = config->channels_min;
3552 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3553 = config->channels_max;
3555 memset(&substream, 0, sizeof(substream));
3557 /* Allocate a dummy snd_pcm_runtime for startup() and other ops() */
3558 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
3563 substream.runtime = runtime;
3566 case SND_SOC_DAPM_PRE_PMU:
3567 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3568 if (source->driver->ops && source->driver->ops->startup) {
3569 ret = source->driver->ops->startup(&substream, source);
3571 dev_err(source->dev,
3572 "ASoC: startup() failed: %d\n", ret);
3577 ret = soc_dai_hw_params(&substream, params, source);
3581 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3582 if (sink->driver->ops && sink->driver->ops->startup) {
3583 ret = sink->driver->ops->startup(&substream, sink);
3586 "ASoC: startup() failed: %d\n", ret);
3591 ret = soc_dai_hw_params(&substream, params, sink);
3596 case SND_SOC_DAPM_POST_PMU:
3597 ret = snd_soc_dai_digital_mute(sink, 0,
3598 SNDRV_PCM_STREAM_PLAYBACK);
3599 if (ret != 0 && ret != -ENOTSUPP)
3600 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3604 case SND_SOC_DAPM_PRE_PMD:
3605 ret = snd_soc_dai_digital_mute(sink, 1,
3606 SNDRV_PCM_STREAM_PLAYBACK);
3607 if (ret != 0 && ret != -ENOTSUPP)
3608 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3612 if (source->driver->ops && source->driver->ops->shutdown) {
3613 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3614 source->driver->ops->shutdown(&substream, source);
3618 if (sink->driver->ops && sink->driver->ops->shutdown) {
3619 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3620 sink->driver->ops->shutdown(&substream, sink);
3625 WARN(1, "Unknown event %d\n", event);
3635 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3636 struct snd_ctl_elem_value *ucontrol)
3638 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3640 ucontrol->value.enumerated.item[0] = w->params_select;
3645 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3646 struct snd_ctl_elem_value *ucontrol)
3648 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3650 /* Can't change the config when widget is already powered */
3654 if (ucontrol->value.enumerated.item[0] == w->params_select)
3657 if (ucontrol->value.enumerated.item[0] >= w->num_params)
3660 w->params_select = ucontrol->value.enumerated.item[0];
3665 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3666 const struct snd_soc_pcm_stream *params,
3667 unsigned int num_params,
3668 struct snd_soc_dapm_widget *source,
3669 struct snd_soc_dapm_widget *sink)
3671 struct snd_soc_dapm_widget template;
3672 struct snd_soc_dapm_widget *w;
3675 unsigned long private_value;
3676 const char **w_param_text;
3677 struct soc_enum w_param_enum[] = {
3678 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3680 struct snd_kcontrol_new kcontrol_dai_link[] = {
3681 SOC_ENUM_EXT(NULL, w_param_enum[0],
3682 snd_soc_dapm_dai_link_get,
3683 snd_soc_dapm_dai_link_put),
3685 const struct snd_soc_pcm_stream *config = params;
3687 w_param_text = devm_kcalloc(card->dev, num_params,
3688 sizeof(char *), GFP_KERNEL);
3692 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3693 source->name, sink->name);
3696 goto outfree_w_param;
3699 for (count = 0 ; count < num_params; count++) {
3700 if (!config->stream_name) {
3701 dev_warn(card->dapm.dev,
3702 "ASoC: anonymous config %d for dai link %s\n",
3704 w_param_text[count] =
3705 devm_kasprintf(card->dev, GFP_KERNEL,
3706 "Anonymous Configuration %d",
3708 if (!w_param_text[count]) {
3710 goto outfree_link_name;
3713 w_param_text[count] = devm_kmemdup(card->dev,
3714 config->stream_name,
3715 strlen(config->stream_name) + 1,
3717 if (!w_param_text[count]) {
3719 goto outfree_link_name;
3724 w_param_enum[0].items = num_params;
3725 w_param_enum[0].texts = w_param_text;
3727 memset(&template, 0, sizeof(template));
3728 template.reg = SND_SOC_NOPM;
3729 template.id = snd_soc_dapm_dai_link;
3730 template.name = link_name;
3731 template.event = snd_soc_dai_link_event;
3732 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3733 SND_SOC_DAPM_PRE_PMD;
3734 template.num_kcontrols = 1;
3735 /* duplicate w_param_enum on heap so that memory persists */
3737 (unsigned long) devm_kmemdup(card->dev,
3738 (void *)(kcontrol_dai_link[0].private_value),
3739 sizeof(struct soc_enum), GFP_KERNEL);
3740 if (!private_value) {
3741 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3744 goto outfree_link_name;
3746 kcontrol_dai_link[0].private_value = private_value;
3747 /* duplicate kcontrol_dai_link on heap so that memory persists */
3748 template.kcontrol_news =
3749 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3750 sizeof(struct snd_kcontrol_new),
3752 if (!template.kcontrol_news) {
3753 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3756 goto outfree_private_value;
3759 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3761 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3763 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3766 goto outfree_kcontrol_news;
3770 w->num_params = num_params;
3772 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3775 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3778 devm_kfree(card->dev, w);
3779 outfree_kcontrol_news:
3780 devm_kfree(card->dev, (void *)template.kcontrol_news);
3781 outfree_private_value:
3782 devm_kfree(card->dev, (void *)private_value);
3784 devm_kfree(card->dev, link_name);
3786 for (count = 0 ; count < num_params; count++)
3787 devm_kfree(card->dev, (void *)w_param_text[count]);
3788 devm_kfree(card->dev, w_param_text);
3793 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3794 struct snd_soc_dai *dai)
3796 struct snd_soc_dapm_widget template;
3797 struct snd_soc_dapm_widget *w;
3799 WARN_ON(dapm->dev != dai->dev);
3801 memset(&template, 0, sizeof(template));
3802 template.reg = SND_SOC_NOPM;
3804 if (dai->driver->playback.stream_name) {
3805 template.id = snd_soc_dapm_dai_in;
3806 template.name = dai->driver->playback.stream_name;
3807 template.sname = dai->driver->playback.stream_name;
3809 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3812 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3814 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3815 dai->driver->playback.stream_name);
3820 dai->playback_widget = w;
3823 if (dai->driver->capture.stream_name) {
3824 template.id = snd_soc_dapm_dai_out;
3825 template.name = dai->driver->capture.stream_name;
3826 template.sname = dai->driver->capture.stream_name;
3828 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3831 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3833 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3834 dai->driver->capture.stream_name);
3839 dai->capture_widget = w;
3845 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3847 struct snd_soc_dapm_widget *dai_w, *w;
3848 struct snd_soc_dapm_widget *src, *sink;
3849 struct snd_soc_dai *dai;
3851 /* For each DAI widget... */
3852 list_for_each_entry(dai_w, &card->widgets, list) {
3853 switch (dai_w->id) {
3854 case snd_soc_dapm_dai_in:
3855 case snd_soc_dapm_dai_out:
3863 /* ...find all widgets with the same stream and link them */
3864 list_for_each_entry(w, &card->widgets, list) {
3865 if (w->dapm != dai_w->dapm)
3869 case snd_soc_dapm_dai_in:
3870 case snd_soc_dapm_dai_out:
3876 if (!w->sname || !strstr(w->sname, dai_w->sname))
3879 if (dai_w->id == snd_soc_dapm_dai_in) {
3886 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3887 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3894 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3895 struct snd_soc_pcm_runtime *rtd)
3897 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3898 struct snd_soc_dapm_widget *sink, *source;
3901 for (i = 0; i < rtd->num_codecs; i++) {
3902 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3904 /* connect BE DAI playback if widgets are valid */
3905 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3906 source = cpu_dai->playback_widget;
3907 sink = codec_dai->playback_widget;
3908 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3909 cpu_dai->component->name, source->name,
3910 codec_dai->component->name, sink->name);
3912 snd_soc_dapm_add_path(&card->dapm, source, sink,
3916 /* connect BE DAI capture if widgets are valid */
3917 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3918 source = codec_dai->capture_widget;
3919 sink = cpu_dai->capture_widget;
3920 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3921 codec_dai->component->name, source->name,
3922 cpu_dai->component->name, sink->name);
3924 snd_soc_dapm_add_path(&card->dapm, source, sink,
3930 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3933 struct snd_soc_dapm_widget *w;
3936 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3937 w = dai->playback_widget;
3939 w = dai->capture_widget;
3942 dapm_mark_dirty(w, "stream event");
3944 if (w->id == snd_soc_dapm_dai_in) {
3945 ep = SND_SOC_DAPM_EP_SOURCE;
3946 dapm_widget_invalidate_input_paths(w);
3948 ep = SND_SOC_DAPM_EP_SINK;
3949 dapm_widget_invalidate_output_paths(w);
3953 case SND_SOC_DAPM_STREAM_START:
3957 case SND_SOC_DAPM_STREAM_STOP:
3961 case SND_SOC_DAPM_STREAM_SUSPEND:
3962 case SND_SOC_DAPM_STREAM_RESUME:
3963 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3964 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3970 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3972 struct snd_soc_pcm_runtime *rtd;
3974 /* for each BE DAI link... */
3975 list_for_each_entry(rtd, &card->rtd_list, list) {
3977 * dynamic FE links have no fixed DAI mapping.
3978 * CODEC<->CODEC links have no direct connection.
3980 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3983 dapm_connect_dai_link_widgets(card, rtd);
3987 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3992 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
3993 for (i = 0; i < rtd->num_codecs; i++)
3994 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
3996 dapm_power_widgets(rtd->card, event);
4000 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4001 * @rtd: PCM runtime data
4002 * @stream: stream name
4003 * @event: stream event
4005 * Sends a stream event to the dapm core. The core then makes any
4006 * necessary widget power changes.
4008 * Returns 0 for success else error.
4010 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4013 struct snd_soc_card *card = rtd->card;
4015 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4016 soc_dapm_stream_event(rtd, stream, event);
4017 mutex_unlock(&card->dapm_mutex);
4021 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4022 * @dapm: DAPM context
4025 * Enables input/output pin and its parents or children widgets iff there is
4026 * a valid audio route and active audio stream.
4028 * Requires external locking.
4030 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4031 * do any widget power switching.
4033 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4036 return snd_soc_dapm_set_pin(dapm, pin, 1);
4038 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4041 * snd_soc_dapm_enable_pin - enable pin.
4042 * @dapm: DAPM context
4045 * Enables input/output pin and its parents or children widgets iff there is
4046 * a valid audio route and active audio stream.
4048 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4049 * do any widget power switching.
4051 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4055 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4057 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4059 mutex_unlock(&dapm->card->dapm_mutex);
4063 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4066 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4067 * @dapm: DAPM context
4070 * Enables input/output pin regardless of any other state. This is
4071 * intended for use with microphone bias supplies used in microphone
4074 * Requires external locking.
4076 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4077 * do any widget power switching.
4079 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4082 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4085 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4089 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4090 if (!w->connected) {
4092 * w->force does not affect the number of input or output paths,
4093 * so we only have to recheck if w->connected is changed
4095 dapm_widget_invalidate_input_paths(w);
4096 dapm_widget_invalidate_output_paths(w);
4100 dapm_mark_dirty(w, "force enable");
4104 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4107 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4108 * @dapm: DAPM context
4111 * Enables input/output pin regardless of any other state. This is
4112 * intended for use with microphone bias supplies used in microphone
4115 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4116 * do any widget power switching.
4118 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4123 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4125 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4127 mutex_unlock(&dapm->card->dapm_mutex);
4131 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4134 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4135 * @dapm: DAPM context
4138 * Disables input/output pin and its parents or children widgets.
4140 * Requires external locking.
4142 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4143 * do any widget power switching.
4145 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4148 return snd_soc_dapm_set_pin(dapm, pin, 0);
4150 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4153 * snd_soc_dapm_disable_pin - disable pin.
4154 * @dapm: DAPM context
4157 * Disables input/output pin and its parents or children widgets.
4159 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4160 * do any widget power switching.
4162 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4167 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4169 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4171 mutex_unlock(&dapm->card->dapm_mutex);
4175 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4178 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4179 * @dapm: DAPM context
4182 * Marks the specified pin as being not connected, disabling it along
4183 * any parent or child widgets. At present this is identical to
4184 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4185 * additional things such as disabling controls which only affect
4186 * paths through the pin.
4188 * Requires external locking.
4190 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4191 * do any widget power switching.
4193 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4196 return snd_soc_dapm_set_pin(dapm, pin, 0);
4198 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4201 * snd_soc_dapm_nc_pin - permanently disable pin.
4202 * @dapm: DAPM context
4205 * Marks the specified pin as being not connected, disabling it along
4206 * any parent or child widgets. At present this is identical to
4207 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4208 * additional things such as disabling controls which only affect
4209 * paths through the pin.
4211 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4212 * do any widget power switching.
4214 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4218 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4220 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4222 mutex_unlock(&dapm->card->dapm_mutex);
4226 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4229 * snd_soc_dapm_get_pin_status - get audio pin status
4230 * @dapm: DAPM context
4231 * @pin: audio signal pin endpoint (or start point)
4233 * Get audio pin status - connected or disconnected.
4235 * Returns 1 for connected otherwise 0.
4237 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4240 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4243 return w->connected;
4247 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4250 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4251 * @dapm: DAPM context
4252 * @pin: audio signal pin endpoint (or start point)
4254 * Mark the given endpoint or pin as ignoring suspend. When the
4255 * system is disabled a path between two endpoints flagged as ignoring
4256 * suspend will not be disabled. The path must already be enabled via
4257 * normal means at suspend time, it will not be turned on if it was not
4260 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4263 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4266 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4270 w->ignore_suspend = 1;
4274 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4277 * snd_soc_dapm_free - free dapm resources
4278 * @dapm: DAPM context
4280 * Free all dapm widgets and resources.
4282 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4284 dapm_debugfs_cleanup(dapm);
4285 dapm_free_widgets(dapm);
4286 list_del(&dapm->list);
4288 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4290 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4292 struct snd_soc_card *card = dapm->card;
4293 struct snd_soc_dapm_widget *w;
4294 LIST_HEAD(down_list);
4297 mutex_lock(&card->dapm_mutex);
4299 list_for_each_entry(w, &dapm->card->widgets, list) {
4300 if (w->dapm != dapm)
4303 dapm_seq_insert(w, &down_list, false);
4309 /* If there were no widgets to power down we're already in
4313 if (dapm->bias_level == SND_SOC_BIAS_ON)
4314 snd_soc_dapm_set_bias_level(dapm,
4315 SND_SOC_BIAS_PREPARE);
4316 dapm_seq_run(card, &down_list, 0, false);
4317 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4318 snd_soc_dapm_set_bias_level(dapm,
4319 SND_SOC_BIAS_STANDBY);
4322 mutex_unlock(&card->dapm_mutex);
4326 * snd_soc_dapm_shutdown - callback for system shutdown
4328 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4330 struct snd_soc_dapm_context *dapm;
4332 list_for_each_entry(dapm, &card->dapm_list, list) {
4333 if (dapm != &card->dapm) {
4334 soc_dapm_shutdown_dapm(dapm);
4335 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4336 snd_soc_dapm_set_bias_level(dapm,
4341 soc_dapm_shutdown_dapm(&card->dapm);
4342 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4343 snd_soc_dapm_set_bias_level(&card->dapm,
4347 /* Module information */
4348 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4349 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4350 MODULE_LICENSE("GPL");