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)
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", kcontrol->id.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,
361 if (IS_ERR(data->widget)) {
362 ret = PTR_ERR(data->widget);
371 case snd_soc_dapm_demux:
372 case snd_soc_dapm_mux:
373 e = (struct soc_enum *)kcontrol->private_value;
375 if (e->autodisable) {
376 struct snd_soc_dapm_widget template;
378 name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name,
385 memset(&template, 0, sizeof(template));
386 template.reg = e->reg;
387 template.mask = e->mask;
388 template.shift = e->shift_l;
389 template.off_val = snd_soc_enum_item_to_val(e, 0);
390 template.on_val = template.off_val;
391 template.id = snd_soc_dapm_kcontrol;
392 template.name = name;
394 data->value = template.on_val;
396 data->widget = snd_soc_dapm_new_control_unlocked(
397 widget->dapm, &template);
399 if (IS_ERR(data->widget)) {
400 ret = PTR_ERR(data->widget);
408 snd_soc_dapm_add_path(widget->dapm, data->widget,
416 kcontrol->private_data = data;
425 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
427 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
429 list_del(&data->paths);
434 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
435 const struct snd_kcontrol *kcontrol)
437 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
442 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
443 struct snd_soc_dapm_widget *widget)
445 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
446 struct snd_soc_dapm_widget_list *new_wlist;
450 n = data->wlist->num_widgets + 1;
454 new_wlist = krealloc(data->wlist,
455 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
459 new_wlist->widgets[n - 1] = widget;
460 new_wlist->num_widgets = n;
462 data->wlist = new_wlist;
467 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
468 struct snd_soc_dapm_path *path)
470 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
472 list_add_tail(&path->list_kcontrol, &data->paths);
475 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
477 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
482 return data->widget->power;
485 static struct list_head *dapm_kcontrol_get_path_list(
486 const struct snd_kcontrol *kcontrol)
488 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 #define dapm_kcontrol_for_each_path(path, kcontrol) \
494 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
497 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
499 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
503 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
505 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
508 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
510 if (data->value == value)
514 switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
515 case snd_soc_dapm_switch:
516 case snd_soc_dapm_mixer:
517 case snd_soc_dapm_mixer_named_ctl:
518 data->widget->on_val = value & data->widget->mask;
520 case snd_soc_dapm_demux:
521 case snd_soc_dapm_mux:
522 data->widget->on_val = value >> data->widget->shift;
525 data->widget->on_val = value;
536 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
538 * @kcontrol: The kcontrol
540 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
541 struct snd_kcontrol *kcontrol)
543 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
545 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
548 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
550 * @kcontrol: The kcontrol
552 * Note: This function must only be used on kcontrols that are known to have
553 * been registered for a CODEC. Otherwise the behaviour is undefined.
555 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
556 struct snd_kcontrol *kcontrol)
558 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
560 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
562 static void dapm_reset(struct snd_soc_card *card)
564 struct snd_soc_dapm_widget *w;
566 lockdep_assert_held(&card->dapm_mutex);
568 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
570 list_for_each_entry(w, &card->widgets, list) {
571 w->new_power = w->power;
572 w->power_checked = false;
576 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
578 if (!dapm->component)
580 return dapm->component->name_prefix;
583 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
586 if (!dapm->component)
588 return snd_soc_component_read(dapm->component, reg, value);
591 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
592 int reg, unsigned int mask, unsigned int value)
594 if (!dapm->component)
596 return snd_soc_component_update_bits(dapm->component, reg,
600 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
601 int reg, unsigned int mask, unsigned int value)
603 if (!dapm->component)
605 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
608 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
611 snd_soc_component_async_complete(dapm->component);
614 static struct snd_soc_dapm_widget *
615 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
617 struct snd_soc_dapm_widget *w = wcache->widget;
618 struct list_head *wlist;
623 wlist = &w->dapm->card->widgets;
625 list_for_each_entry_from(w, wlist, list) {
626 if (!strcmp(name, w->name))
637 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
638 struct snd_soc_dapm_widget *w)
644 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
645 * @dapm: The DAPM context for which to set the level
646 * @level: The level to set
648 * Forces the DAPM bias level to a specific state. It will call the bias level
649 * callback of DAPM context with the specified level. This will even happen if
650 * the context is already at the same level. Furthermore it will not go through
651 * the normal bias level sequencing, meaning any intermediate states between the
652 * current and the target state will not be entered.
654 * Note that the change in bias level is only temporary and the next time
655 * snd_soc_dapm_sync() is called the state will be set to the level as
656 * determined by the DAPM core. The function is mainly intended to be used to
657 * used during probe or resume from suspend to power up the device so
658 * initialization can be done, before the DAPM core takes over.
660 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
661 enum snd_soc_bias_level level)
665 if (dapm->set_bias_level)
666 ret = dapm->set_bias_level(dapm, level);
669 dapm->bias_level = level;
673 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
676 * snd_soc_dapm_set_bias_level - set the bias level for the system
677 * @dapm: DAPM context
678 * @level: level to configure
680 * Configure the bias (power) levels for the SoC audio device.
682 * Returns 0 for success else error.
684 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
685 enum snd_soc_bias_level level)
687 struct snd_soc_card *card = dapm->card;
690 trace_snd_soc_bias_level_start(card, level);
692 if (card && card->set_bias_level)
693 ret = card->set_bias_level(card, dapm, level);
697 if (!card || dapm != &card->dapm)
698 ret = snd_soc_dapm_force_bias_level(dapm, level);
703 if (card && card->set_bias_level_post)
704 ret = card->set_bias_level_post(card, dapm, level);
706 trace_snd_soc_bias_level_done(card, level);
711 /* connect mux widget to its interconnecting audio paths */
712 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
713 struct snd_soc_dapm_path *path, const char *control_name,
714 struct snd_soc_dapm_widget *w)
716 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
717 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
718 unsigned int val, item;
721 if (e->reg != SND_SOC_NOPM) {
722 soc_dapm_read(dapm, e->reg, &val);
723 val = (val >> e->shift_l) & e->mask;
724 item = snd_soc_enum_val_to_item(e, val);
726 /* since a virtual mux has no backing registers to
727 * decide which path to connect, it will try to match
728 * with the first enumeration. This is to ensure
729 * that the default mux choice (the first) will be
730 * correctly powered up during initialization.
735 for (i = 0; i < e->items; i++) {
736 if (!(strcmp(control_name, e->texts[i]))) {
737 path->name = e->texts[i];
749 /* set up initial codec paths */
750 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
752 struct soc_mixer_control *mc = (struct soc_mixer_control *)
753 p->sink->kcontrol_news[i].private_value;
754 unsigned int reg = mc->reg;
755 unsigned int shift = mc->shift;
756 unsigned int max = mc->max;
757 unsigned int mask = (1 << fls(max)) - 1;
758 unsigned int invert = mc->invert;
761 if (reg != SND_SOC_NOPM) {
762 soc_dapm_read(p->sink->dapm, reg, &val);
763 val = (val >> shift) & mask;
768 /* since a virtual mixer has no backing registers to
769 * decide which path to connect, it will try to match
770 * with initial state. This is to ensure
771 * that the default mixer choice will be
772 * correctly powered up during initialization.
778 /* connect mixer widget to its interconnecting audio paths */
779 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
780 struct snd_soc_dapm_path *path, const char *control_name)
784 /* search for mixer kcontrol */
785 for (i = 0; i < path->sink->num_kcontrols; i++) {
786 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
787 path->name = path->sink->kcontrol_news[i].name;
788 dapm_set_mixer_path_status(path, i);
795 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
796 struct snd_soc_dapm_widget *kcontrolw,
797 const struct snd_kcontrol_new *kcontrol_new,
798 struct snd_kcontrol **kcontrol)
800 struct snd_soc_dapm_widget *w;
805 list_for_each_entry(w, &dapm->card->widgets, list) {
806 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
808 for (i = 0; i < w->num_kcontrols; i++) {
809 if (&w->kcontrol_news[i] == kcontrol_new) {
811 *kcontrol = w->kcontrols[i];
821 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
822 * create it. Either way, add the widget into the control's widget list
824 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
827 struct snd_soc_dapm_context *dapm = w->dapm;
828 struct snd_card *card = dapm->card->snd_card;
832 struct snd_kcontrol *kcontrol;
833 bool wname_in_long_name, kcname_in_long_name;
834 char *long_name = NULL;
838 prefix = soc_dapm_prefix(dapm);
840 prefix_len = strlen(prefix) + 1;
844 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
849 wname_in_long_name = false;
850 kcname_in_long_name = true;
853 case snd_soc_dapm_switch:
854 case snd_soc_dapm_mixer:
855 case snd_soc_dapm_pga:
856 case snd_soc_dapm_out_drv:
857 wname_in_long_name = true;
858 kcname_in_long_name = true;
860 case snd_soc_dapm_mixer_named_ctl:
861 wname_in_long_name = false;
862 kcname_in_long_name = true;
864 case snd_soc_dapm_demux:
865 case snd_soc_dapm_mux:
866 wname_in_long_name = true;
867 kcname_in_long_name = false;
874 if (wname_in_long_name && kcname_in_long_name) {
876 * The control will get a prefix from the control
877 * creation process but we're also using the same
878 * prefix for widgets so cut the prefix off the
879 * front of the widget name.
881 long_name = kasprintf(GFP_KERNEL, "%s %s",
882 w->name + prefix_len,
883 w->kcontrol_news[kci].name);
884 if (long_name == NULL)
888 } else if (wname_in_long_name) {
890 name = w->name + prefix_len;
893 name = w->kcontrol_news[kci].name;
896 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
903 kcontrol->private_free = dapm_kcontrol_free;
905 ret = dapm_kcontrol_data_alloc(w, kcontrol);
907 snd_ctl_free_one(kcontrol);
911 ret = snd_ctl_add(card, kcontrol);
914 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
920 ret = dapm_kcontrol_add_widget(kcontrol, w);
922 w->kcontrols[kci] = kcontrol;
930 /* create new dapm mixer control */
931 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
934 struct snd_soc_dapm_path *path;
935 struct dapm_kcontrol_data *data;
938 for (i = 0; i < w->num_kcontrols; i++) {
940 snd_soc_dapm_widget_for_each_source_path(w, path) {
941 /* mixer/mux paths name must match control name */
942 if (path->name != (char *)w->kcontrol_news[i].name)
945 if (!w->kcontrols[i]) {
946 ret = dapm_create_or_share_kcontrol(w, i);
951 dapm_kcontrol_add_path(w->kcontrols[i], path);
953 data = snd_kcontrol_chip(w->kcontrols[i]);
955 snd_soc_dapm_add_path(data->widget->dapm,
965 /* create new dapm mux control */
966 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
968 struct snd_soc_dapm_context *dapm = w->dapm;
969 enum snd_soc_dapm_direction dir;
970 struct snd_soc_dapm_path *path;
975 case snd_soc_dapm_mux:
976 dir = SND_SOC_DAPM_DIR_OUT;
979 case snd_soc_dapm_demux:
980 dir = SND_SOC_DAPM_DIR_IN;
987 if (w->num_kcontrols != 1) {
989 "ASoC: %s %s has incorrect number of controls\n", type,
994 if (list_empty(&w->edges[dir])) {
995 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
999 ret = dapm_create_or_share_kcontrol(w, 0);
1003 snd_soc_dapm_widget_for_each_path(w, dir, path) {
1005 dapm_kcontrol_add_path(w->kcontrols[0], path);
1011 /* create new dapm volume control */
1012 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
1016 for (i = 0; i < w->num_kcontrols; i++) {
1017 ret = dapm_create_or_share_kcontrol(w, i);
1025 /* create new dapm dai link control */
1026 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1029 struct snd_kcontrol *kcontrol;
1030 struct snd_soc_dapm_context *dapm = w->dapm;
1031 struct snd_card *card = dapm->card->snd_card;
1033 /* create control for links with > 1 config */
1034 if (w->num_params <= 1)
1038 for (i = 0; i < w->num_kcontrols; i++) {
1039 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1041 ret = snd_ctl_add(card, kcontrol);
1044 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1045 w->name, w->kcontrol_news[i].name, ret);
1048 kcontrol->private_data = w;
1049 w->kcontrols[i] = kcontrol;
1055 /* We implement power down on suspend by checking the power state of
1056 * the ALSA card - when we are suspending the ALSA state for the card
1059 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1061 int level = snd_power_get_state(widget->dapm->card->snd_card);
1064 case SNDRV_CTL_POWER_D3hot:
1065 case SNDRV_CTL_POWER_D3cold:
1066 if (widget->ignore_suspend)
1067 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1069 return widget->ignore_suspend;
1075 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1076 struct list_head *widgets)
1078 struct snd_soc_dapm_widget *w;
1079 struct list_head *it;
1080 unsigned int size = 0;
1083 list_for_each(it, widgets)
1086 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1090 list_for_each_entry(w, widgets, work_list)
1091 (*list)->widgets[i++] = w;
1093 (*list)->num_widgets = i;
1099 * Common implementation for is_connected_output_ep() and
1100 * is_connected_input_ep(). The function is inlined since the combined size of
1101 * the two specialized functions is only marginally larger then the size of the
1102 * generic function and at the same time the fast path of the specialized
1103 * functions is significantly smaller than the generic function.
1105 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1106 struct list_head *list, enum snd_soc_dapm_direction dir,
1107 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *))
1109 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1110 struct snd_soc_dapm_path *path;
1113 if (widget->endpoints[dir] >= 0)
1114 return widget->endpoints[dir];
1116 DAPM_UPDATE_STAT(widget, path_checks);
1118 /* do we need to add this widget to the list ? */
1120 list_add_tail(&widget->work_list, list);
1122 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1123 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1124 return widget->endpoints[dir];
1127 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1128 DAPM_UPDATE_STAT(widget, neighbour_checks);
1130 if (path->weak || path->is_supply)
1136 trace_snd_soc_dapm_path(widget, dir, path);
1138 if (path->connect) {
1140 con += fn(path->node[dir], list);
1145 widget->endpoints[dir] = con;
1151 * Recursively check for a completed path to an active or physically connected
1152 * output widget. Returns number of complete paths.
1154 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1155 struct list_head *list)
1157 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1158 is_connected_output_ep);
1162 * Recursively check for a completed path to an active or physically connected
1163 * input widget. Returns number of complete paths.
1165 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1166 struct list_head *list)
1168 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1169 is_connected_input_ep);
1173 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1174 * @dai: the soc DAI.
1175 * @stream: stream direction.
1176 * @list: list of active widgets for this stream.
1178 * Queries DAPM graph as to whether an valid audio stream path exists for
1179 * the initial stream specified by name. This takes into account
1180 * current mixer and mux kcontrol settings. Creates list of valid widgets.
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)
1187 struct snd_soc_card *card = dai->component->card;
1188 struct snd_soc_dapm_widget *w;
1193 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1196 * For is_connected_{output,input}_ep fully discover the graph we need
1197 * to reset the cached number of inputs and outputs.
1199 list_for_each_entry(w, &card->widgets, list) {
1200 w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
1201 w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
1204 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1205 paths = is_connected_output_ep(dai->playback_widget, &widgets);
1207 paths = is_connected_input_ep(dai->capture_widget, &widgets);
1209 /* Drop starting point */
1210 list_del(widgets.next);
1212 ret = dapm_widget_list_create(list, &widgets);
1216 trace_snd_soc_dapm_connected(paths, stream);
1217 mutex_unlock(&card->dapm_mutex);
1223 * Handler for regulator supply widget.
1225 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1226 struct snd_kcontrol *kcontrol, int event)
1230 soc_dapm_async_complete(w->dapm);
1232 if (SND_SOC_DAPM_EVENT_ON(event)) {
1233 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1234 ret = regulator_allow_bypass(w->regulator, false);
1236 dev_warn(w->dapm->dev,
1237 "ASoC: Failed to unbypass %s: %d\n",
1241 return regulator_enable(w->regulator);
1243 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1244 ret = regulator_allow_bypass(w->regulator, true);
1246 dev_warn(w->dapm->dev,
1247 "ASoC: Failed to bypass %s: %d\n",
1251 return regulator_disable_deferred(w->regulator, w->shift);
1254 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1257 * Handler for clock supply widget.
1259 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1260 struct snd_kcontrol *kcontrol, int event)
1265 soc_dapm_async_complete(w->dapm);
1267 #ifdef CONFIG_HAVE_CLK
1268 if (SND_SOC_DAPM_EVENT_ON(event)) {
1269 return clk_prepare_enable(w->clk);
1271 clk_disable_unprepare(w->clk);
1277 EXPORT_SYMBOL_GPL(dapm_clock_event);
1279 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1281 if (w->power_checked)
1282 return w->new_power;
1287 w->new_power = w->power_check(w);
1289 w->power_checked = true;
1291 return w->new_power;
1294 /* Generic check to see if a widget should be powered.
1296 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1300 DAPM_UPDATE_STAT(w, power_checks);
1302 in = is_connected_input_ep(w, NULL);
1303 out = is_connected_output_ep(w, NULL);
1304 return out != 0 && in != 0;
1307 /* Check to see if a power supply is needed */
1308 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1310 struct snd_soc_dapm_path *path;
1312 DAPM_UPDATE_STAT(w, power_checks);
1314 /* Check if one of our outputs is connected */
1315 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1316 DAPM_UPDATE_STAT(w, neighbour_checks);
1321 if (path->connected &&
1322 !path->connected(path->source, path->sink))
1325 if (dapm_widget_power_check(path->sink))
1332 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1337 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1338 struct snd_soc_dapm_widget *b,
1346 sort = dapm_down_seq;
1348 if (sort[a->id] != sort[b->id])
1349 return sort[a->id] - sort[b->id];
1350 if (a->subseq != b->subseq) {
1352 return a->subseq - b->subseq;
1354 return b->subseq - a->subseq;
1356 if (a->reg != b->reg)
1357 return a->reg - b->reg;
1358 if (a->dapm != b->dapm)
1359 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1364 /* Insert a widget in order into a DAPM power sequence. */
1365 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1366 struct list_head *list,
1369 struct snd_soc_dapm_widget *w;
1371 list_for_each_entry(w, list, power_list)
1372 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1373 list_add_tail(&new_widget->power_list, &w->power_list);
1377 list_add_tail(&new_widget->power_list, list);
1380 static void dapm_seq_check_event(struct snd_soc_card *card,
1381 struct snd_soc_dapm_widget *w, int event)
1383 const char *ev_name;
1387 case SND_SOC_DAPM_PRE_PMU:
1388 ev_name = "PRE_PMU";
1391 case SND_SOC_DAPM_POST_PMU:
1392 ev_name = "POST_PMU";
1395 case SND_SOC_DAPM_PRE_PMD:
1396 ev_name = "PRE_PMD";
1399 case SND_SOC_DAPM_POST_PMD:
1400 ev_name = "POST_PMD";
1403 case SND_SOC_DAPM_WILL_PMU:
1404 ev_name = "WILL_PMU";
1407 case SND_SOC_DAPM_WILL_PMD:
1408 ev_name = "WILL_PMD";
1412 WARN(1, "Unknown event %d\n", event);
1416 if (w->new_power != power)
1419 if (w->event && (w->event_flags & event)) {
1420 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1422 soc_dapm_async_complete(w->dapm);
1423 trace_snd_soc_dapm_widget_event_start(w, event);
1424 ret = w->event(w, NULL, event);
1425 trace_snd_soc_dapm_widget_event_done(w, event);
1427 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1428 ev_name, w->name, ret);
1432 /* Apply the coalesced changes from a DAPM sequence */
1433 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1434 struct list_head *pending)
1436 struct snd_soc_dapm_context *dapm;
1437 struct snd_soc_dapm_widget *w;
1439 unsigned int value = 0;
1440 unsigned int mask = 0;
1442 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1446 list_for_each_entry(w, pending, power_list) {
1447 WARN_ON(reg != w->reg || dapm != w->dapm);
1448 w->power = w->new_power;
1450 mask |= w->mask << w->shift;
1452 value |= w->on_val << w->shift;
1454 value |= w->off_val << w->shift;
1456 pop_dbg(dapm->dev, card->pop_time,
1457 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1458 w->name, reg, value, mask);
1460 /* Check for events */
1461 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1462 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1466 /* Any widget will do, they should all be updating the
1470 pop_dbg(dapm->dev, card->pop_time,
1471 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1472 value, mask, reg, card->pop_time);
1473 pop_wait(card->pop_time);
1474 soc_dapm_update_bits(dapm, reg, mask, value);
1477 list_for_each_entry(w, pending, power_list) {
1478 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1479 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1483 /* Apply a DAPM power sequence.
1485 * We walk over a pre-sorted list of widgets to apply power to. In
1486 * order to minimise the number of writes to the device required
1487 * multiple widgets will be updated in a single write where possible.
1488 * Currently anything that requires more than a single write is not
1491 static void dapm_seq_run(struct snd_soc_card *card,
1492 struct list_head *list, int event, bool power_up)
1494 struct snd_soc_dapm_widget *w, *n;
1495 struct snd_soc_dapm_context *d;
1498 int cur_subseq = -1;
1499 int cur_reg = SND_SOC_NOPM;
1500 struct snd_soc_dapm_context *cur_dapm = NULL;
1507 sort = dapm_down_seq;
1509 list_for_each_entry_safe(w, n, list, power_list) {
1512 /* Do we need to apply any queued changes? */
1513 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1514 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1515 if (!list_empty(&pending))
1516 dapm_seq_run_coalesced(card, &pending);
1518 if (cur_dapm && cur_dapm->seq_notifier) {
1519 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1520 if (sort[i] == cur_sort)
1521 cur_dapm->seq_notifier(cur_dapm,
1526 if (cur_dapm && w->dapm != cur_dapm)
1527 soc_dapm_async_complete(cur_dapm);
1529 INIT_LIST_HEAD(&pending);
1531 cur_subseq = INT_MIN;
1532 cur_reg = SND_SOC_NOPM;
1537 case snd_soc_dapm_pre:
1539 list_for_each_entry_safe_continue(w, n, list,
1542 if (event == SND_SOC_DAPM_STREAM_START)
1544 NULL, SND_SOC_DAPM_PRE_PMU);
1545 else if (event == SND_SOC_DAPM_STREAM_STOP)
1547 NULL, SND_SOC_DAPM_PRE_PMD);
1550 case snd_soc_dapm_post:
1552 list_for_each_entry_safe_continue(w, n, list,
1555 if (event == SND_SOC_DAPM_STREAM_START)
1557 NULL, SND_SOC_DAPM_POST_PMU);
1558 else if (event == SND_SOC_DAPM_STREAM_STOP)
1560 NULL, SND_SOC_DAPM_POST_PMD);
1564 /* Queue it up for application */
1565 cur_sort = sort[w->id];
1566 cur_subseq = w->subseq;
1569 list_move(&w->power_list, &pending);
1574 dev_err(w->dapm->dev,
1575 "ASoC: Failed to apply widget power: %d\n", ret);
1578 if (!list_empty(&pending))
1579 dapm_seq_run_coalesced(card, &pending);
1581 if (cur_dapm && cur_dapm->seq_notifier) {
1582 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1583 if (sort[i] == cur_sort)
1584 cur_dapm->seq_notifier(cur_dapm,
1588 list_for_each_entry(d, &card->dapm_list, list) {
1589 soc_dapm_async_complete(d);
1593 static void dapm_widget_update(struct snd_soc_card *card)
1595 struct snd_soc_dapm_update *update = card->update;
1596 struct snd_soc_dapm_widget_list *wlist;
1597 struct snd_soc_dapm_widget *w = NULL;
1601 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1604 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1606 for (wi = 0; wi < wlist->num_widgets; wi++) {
1607 w = wlist->widgets[wi];
1609 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1610 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1612 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1620 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1623 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1626 for (wi = 0; wi < wlist->num_widgets; wi++) {
1627 w = wlist->widgets[wi];
1629 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1630 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1632 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1638 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1639 * they're changing state.
1641 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1643 struct snd_soc_dapm_context *d = data;
1646 /* If we're off and we're not supposed to be go into STANDBY */
1647 if (d->bias_level == SND_SOC_BIAS_OFF &&
1648 d->target_bias_level != SND_SOC_BIAS_OFF) {
1650 pm_runtime_get_sync(d->dev);
1652 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1655 "ASoC: Failed to turn on bias: %d\n", ret);
1658 /* Prepare for a transition to ON or away from ON */
1659 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1660 d->bias_level != SND_SOC_BIAS_ON) ||
1661 (d->target_bias_level != SND_SOC_BIAS_ON &&
1662 d->bias_level == SND_SOC_BIAS_ON)) {
1663 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1666 "ASoC: Failed to prepare bias: %d\n", ret);
1670 /* Async callback run prior to DAPM sequences - brings to their final
1673 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1675 struct snd_soc_dapm_context *d = data;
1678 /* If we just powered the last thing off drop to standby bias */
1679 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1680 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1681 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1682 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1684 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1688 /* If we're in standby and can support bias off then do that */
1689 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1690 d->target_bias_level == SND_SOC_BIAS_OFF) {
1691 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1693 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1697 pm_runtime_put(d->dev);
1700 /* If we just powered up then move to active bias */
1701 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1702 d->target_bias_level == SND_SOC_BIAS_ON) {
1703 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1705 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1710 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1711 bool power, bool connect)
1713 /* If a connection is being made or broken then that update
1714 * will have marked the peer dirty, otherwise the widgets are
1715 * not connected and this update has no impact. */
1719 /* If the peer is already in the state we're moving to then we
1720 * won't have an impact on it. */
1721 if (power != peer->power)
1722 dapm_mark_dirty(peer, "peer state change");
1725 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1726 struct list_head *up_list,
1727 struct list_head *down_list)
1729 struct snd_soc_dapm_path *path;
1731 if (w->power == power)
1734 trace_snd_soc_dapm_widget_power(w, power);
1736 /* If we changed our power state perhaps our neigbours changed
1739 snd_soc_dapm_widget_for_each_source_path(w, path)
1740 dapm_widget_set_peer_power(path->source, power, path->connect);
1742 /* Supplies can't affect their outputs, only their inputs */
1743 if (!w->is_supply) {
1744 snd_soc_dapm_widget_for_each_sink_path(w, path)
1745 dapm_widget_set_peer_power(path->sink, power,
1750 dapm_seq_insert(w, up_list, true);
1752 dapm_seq_insert(w, down_list, false);
1755 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1756 struct list_head *up_list,
1757 struct list_head *down_list)
1762 case snd_soc_dapm_pre:
1763 dapm_seq_insert(w, down_list, false);
1765 case snd_soc_dapm_post:
1766 dapm_seq_insert(w, up_list, true);
1770 power = dapm_widget_power_check(w);
1772 dapm_widget_set_power(w, power, up_list, down_list);
1777 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1779 if (dapm->idle_bias_off)
1782 switch (snd_power_get_state(dapm->card->snd_card)) {
1783 case SNDRV_CTL_POWER_D3hot:
1784 case SNDRV_CTL_POWER_D3cold:
1785 return dapm->suspend_bias_off;
1794 * Scan each dapm widget for complete audio path.
1795 * A complete path is a route that has valid endpoints i.e.:-
1797 * o DAC to output pin.
1798 * o Input Pin to ADC.
1799 * o Input pin to Output pin (bypass, sidetone)
1800 * o DAC to ADC (loopback).
1802 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1804 struct snd_soc_dapm_widget *w;
1805 struct snd_soc_dapm_context *d;
1807 LIST_HEAD(down_list);
1808 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1809 enum snd_soc_bias_level bias;
1811 lockdep_assert_held(&card->dapm_mutex);
1813 trace_snd_soc_dapm_start(card);
1815 list_for_each_entry(d, &card->dapm_list, list) {
1816 if (dapm_idle_bias_off(d))
1817 d->target_bias_level = SND_SOC_BIAS_OFF;
1819 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1824 /* Check which widgets we need to power and store them in
1825 * lists indicating if they should be powered up or down. We
1826 * only check widgets that have been flagged as dirty but note
1827 * that new widgets may be added to the dirty list while we
1830 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1831 dapm_power_one_widget(w, &up_list, &down_list);
1834 list_for_each_entry(w, &card->widgets, list) {
1836 case snd_soc_dapm_pre:
1837 case snd_soc_dapm_post:
1838 /* These widgets always need to be powered */
1841 list_del_init(&w->dirty);
1848 /* Supplies and micbiases only bring the
1849 * context up to STANDBY as unless something
1850 * else is active and passing audio they
1851 * generally don't require full power. Signal
1852 * generators are virtual pins and have no
1853 * power impact themselves.
1856 case snd_soc_dapm_siggen:
1857 case snd_soc_dapm_vmid:
1859 case snd_soc_dapm_supply:
1860 case snd_soc_dapm_regulator_supply:
1861 case snd_soc_dapm_clock_supply:
1862 case snd_soc_dapm_micbias:
1863 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1864 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1867 d->target_bias_level = SND_SOC_BIAS_ON;
1874 /* Force all contexts in the card to the same bias state if
1875 * they're not ground referenced.
1877 bias = SND_SOC_BIAS_OFF;
1878 list_for_each_entry(d, &card->dapm_list, list)
1879 if (d->target_bias_level > bias)
1880 bias = d->target_bias_level;
1881 list_for_each_entry(d, &card->dapm_list, list)
1882 if (!dapm_idle_bias_off(d))
1883 d->target_bias_level = bias;
1885 trace_snd_soc_dapm_walk_done(card);
1887 /* Run card bias changes at first */
1888 dapm_pre_sequence_async(&card->dapm, 0);
1889 /* Run other bias changes in parallel */
1890 list_for_each_entry(d, &card->dapm_list, list) {
1891 if (d != &card->dapm)
1892 async_schedule_domain(dapm_pre_sequence_async, d,
1895 async_synchronize_full_domain(&async_domain);
1897 list_for_each_entry(w, &down_list, power_list) {
1898 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1901 list_for_each_entry(w, &up_list, power_list) {
1902 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1905 /* Power down widgets first; try to avoid amplifying pops. */
1906 dapm_seq_run(card, &down_list, event, false);
1908 dapm_widget_update(card);
1911 dapm_seq_run(card, &up_list, event, true);
1913 /* Run all the bias changes in parallel */
1914 list_for_each_entry(d, &card->dapm_list, list) {
1915 if (d != &card->dapm)
1916 async_schedule_domain(dapm_post_sequence_async, d,
1919 async_synchronize_full_domain(&async_domain);
1920 /* Run card bias changes at last */
1921 dapm_post_sequence_async(&card->dapm, 0);
1923 /* do we need to notify any clients that DAPM event is complete */
1924 list_for_each_entry(d, &card->dapm_list, list) {
1925 if (d->stream_event)
1926 d->stream_event(d, event);
1929 pop_dbg(card->dev, card->pop_time,
1930 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1931 pop_wait(card->pop_time);
1933 trace_snd_soc_dapm_done(card);
1938 #ifdef CONFIG_DEBUG_FS
1939 static ssize_t dapm_widget_power_read_file(struct file *file,
1940 char __user *user_buf,
1941 size_t count, loff_t *ppos)
1943 struct snd_soc_dapm_widget *w = file->private_data;
1944 struct snd_soc_card *card = w->dapm->card;
1945 enum snd_soc_dapm_direction dir, rdir;
1949 struct snd_soc_dapm_path *p = NULL;
1951 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1955 mutex_lock(&card->dapm_mutex);
1957 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1962 in = is_connected_input_ep(w, NULL);
1963 out = is_connected_output_ep(w, NULL);
1966 ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1967 w->name, w->power ? "On" : "Off",
1968 w->force ? " (forced)" : "", in, out);
1971 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
1972 " - R%d(0x%x) mask 0x%x",
1973 w->reg, w->reg, w->mask << w->shift);
1975 ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
1978 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1980 w->active ? "active" : "inactive");
1982 snd_soc_dapm_for_each_direction(dir) {
1983 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1984 snd_soc_dapm_widget_for_each_path(w, dir, p) {
1985 if (p->connected && !p->connected(w, p->node[rdir]))
1991 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
1992 " %s \"%s\" \"%s\"\n",
1993 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
1994 p->name ? p->name : "static",
1995 p->node[rdir]->name);
1999 mutex_unlock(&card->dapm_mutex);
2001 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2007 static const struct file_operations dapm_widget_power_fops = {
2008 .open = simple_open,
2009 .read = dapm_widget_power_read_file,
2010 .llseek = default_llseek,
2013 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2014 size_t count, loff_t *ppos)
2016 struct snd_soc_dapm_context *dapm = file->private_data;
2019 switch (dapm->bias_level) {
2020 case SND_SOC_BIAS_ON:
2023 case SND_SOC_BIAS_PREPARE:
2024 level = "Prepare\n";
2026 case SND_SOC_BIAS_STANDBY:
2027 level = "Standby\n";
2029 case SND_SOC_BIAS_OFF:
2033 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2034 level = "Unknown\n";
2038 return simple_read_from_buffer(user_buf, count, ppos, level,
2042 static const struct file_operations dapm_bias_fops = {
2043 .open = simple_open,
2044 .read = dapm_bias_read_file,
2045 .llseek = default_llseek,
2048 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2049 struct dentry *parent)
2056 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2058 if (!dapm->debugfs_dapm) {
2060 "ASoC: Failed to create DAPM debugfs directory\n");
2064 d = debugfs_create_file("bias_level", 0444,
2065 dapm->debugfs_dapm, dapm,
2069 "ASoC: Failed to create bias level debugfs file\n");
2072 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2074 struct snd_soc_dapm_context *dapm = w->dapm;
2077 if (!dapm->debugfs_dapm || !w->name)
2080 d = debugfs_create_file(w->name, 0444,
2081 dapm->debugfs_dapm, w,
2082 &dapm_widget_power_fops);
2084 dev_warn(w->dapm->dev,
2085 "ASoC: Failed to create %s debugfs file\n",
2089 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2091 debugfs_remove_recursive(dapm->debugfs_dapm);
2095 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2096 struct dentry *parent)
2100 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2104 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2111 * soc_dapm_connect_path() - Connects or disconnects a path
2112 * @path: The path to update
2113 * @connect: The new connect state of the path. True if the path is connected,
2114 * false if it is disconneted.
2115 * @reason: The reason why the path changed (for debugging only)
2117 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2118 bool connect, const char *reason)
2120 if (path->connect == connect)
2123 path->connect = connect;
2124 dapm_mark_dirty(path->source, reason);
2125 dapm_mark_dirty(path->sink, reason);
2126 dapm_path_invalidate(path);
2129 /* test and update the power status of a mux widget */
2130 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2131 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2133 struct snd_soc_dapm_path *path;
2137 lockdep_assert_held(&card->dapm_mutex);
2139 /* find dapm widget path assoc with kcontrol */
2140 dapm_kcontrol_for_each_path(path, kcontrol) {
2142 /* we now need to match the string in the enum to the path */
2143 if (!(strcmp(path->name, e->texts[mux])))
2148 soc_dapm_connect_path(path, connect, "mux update");
2152 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2157 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2158 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2159 struct snd_soc_dapm_update *update)
2161 struct snd_soc_card *card = dapm->card;
2164 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2165 card->update = update;
2166 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2167 card->update = NULL;
2168 mutex_unlock(&card->dapm_mutex);
2170 soc_dpcm_runtime_update(card);
2173 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2175 /* test and update the power status of a mixer or switch widget */
2176 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2177 struct snd_kcontrol *kcontrol, int connect)
2179 struct snd_soc_dapm_path *path;
2182 lockdep_assert_held(&card->dapm_mutex);
2184 /* find dapm widget path assoc with kcontrol */
2185 dapm_kcontrol_for_each_path(path, kcontrol) {
2187 soc_dapm_connect_path(path, connect, "mixer update");
2191 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2196 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2197 struct snd_kcontrol *kcontrol, int connect,
2198 struct snd_soc_dapm_update *update)
2200 struct snd_soc_card *card = dapm->card;
2203 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2204 card->update = update;
2205 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2206 card->update = NULL;
2207 mutex_unlock(&card->dapm_mutex);
2209 soc_dpcm_runtime_update(card);
2212 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2214 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2217 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2218 struct snd_soc_dapm_widget *w;
2220 char *state = "not set";
2222 /* card won't be set for the dummy component, as a spot fix
2223 * we're checking for that case specifically here but in future
2224 * we will ensure that the dummy component looks like others.
2229 list_for_each_entry(w, &cmpnt->card->widgets, list) {
2230 if (w->dapm != dapm)
2233 /* only display widgets that burnm power */
2235 case snd_soc_dapm_hp:
2236 case snd_soc_dapm_mic:
2237 case snd_soc_dapm_spk:
2238 case snd_soc_dapm_line:
2239 case snd_soc_dapm_micbias:
2240 case snd_soc_dapm_dac:
2241 case snd_soc_dapm_adc:
2242 case snd_soc_dapm_pga:
2243 case snd_soc_dapm_out_drv:
2244 case snd_soc_dapm_mixer:
2245 case snd_soc_dapm_mixer_named_ctl:
2246 case snd_soc_dapm_supply:
2247 case snd_soc_dapm_regulator_supply:
2248 case snd_soc_dapm_clock_supply:
2250 count += sprintf(buf + count, "%s: %s\n",
2251 w->name, w->power ? "On":"Off");
2258 switch (snd_soc_dapm_get_bias_level(dapm)) {
2259 case SND_SOC_BIAS_ON:
2262 case SND_SOC_BIAS_PREPARE:
2265 case SND_SOC_BIAS_STANDBY:
2268 case SND_SOC_BIAS_OFF:
2272 count += sprintf(buf + count, "PM State: %s\n", state);
2277 /* show dapm widget status in sys fs */
2278 static ssize_t dapm_widget_show(struct device *dev,
2279 struct device_attribute *attr, char *buf)
2281 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2284 mutex_lock(&rtd->card->dapm_mutex);
2286 for (i = 0; i < rtd->num_codecs; i++) {
2287 struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
2289 count += dapm_widget_show_component(cmpnt, buf + count);
2292 mutex_unlock(&rtd->card->dapm_mutex);
2297 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2299 struct attribute *soc_dapm_dev_attrs[] = {
2300 &dev_attr_dapm_widget.attr,
2304 static void dapm_free_path(struct snd_soc_dapm_path *path)
2306 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2307 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2308 list_del(&path->list_kcontrol);
2309 list_del(&path->list);
2313 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2315 struct snd_soc_dapm_path *p, *next_p;
2316 enum snd_soc_dapm_direction dir;
2319 list_del(&w->dirty);
2321 * remove source and sink paths associated to this widget.
2322 * While removing the path, remove reference to it from both
2323 * source and sink widgets so that path is removed only once.
2325 snd_soc_dapm_for_each_direction(dir) {
2326 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2330 kfree(w->kcontrols);
2331 kfree_const(w->name);
2335 void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
2337 dapm->path_sink_cache.widget = NULL;
2338 dapm->path_source_cache.widget = NULL;
2341 /* free all dapm widgets and resources */
2342 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2344 struct snd_soc_dapm_widget *w, *next_w;
2346 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2347 if (w->dapm != dapm)
2349 snd_soc_dapm_free_widget(w);
2351 snd_soc_dapm_reset_cache(dapm);
2354 static struct snd_soc_dapm_widget *dapm_find_widget(
2355 struct snd_soc_dapm_context *dapm, const char *pin,
2356 bool search_other_contexts)
2358 struct snd_soc_dapm_widget *w;
2359 struct snd_soc_dapm_widget *fallback = NULL;
2361 list_for_each_entry(w, &dapm->card->widgets, list) {
2362 if (!strcmp(w->name, pin)) {
2363 if (w->dapm == dapm)
2370 if (search_other_contexts)
2376 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2377 const char *pin, int status)
2379 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2382 dapm_assert_locked(dapm);
2385 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2389 if (w->connected != status) {
2390 dapm_mark_dirty(w, "pin configuration");
2391 dapm_widget_invalidate_input_paths(w);
2392 dapm_widget_invalidate_output_paths(w);
2396 w->connected = status;
2404 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2405 * @dapm: DAPM context
2407 * Walks all dapm audio paths and powers widgets according to their
2408 * stream or path usage.
2410 * Requires external locking.
2412 * Returns 0 for success.
2414 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2417 * Suppress early reports (eg, jacks syncing their state) to avoid
2418 * silly DAPM runs during card startup.
2420 if (!dapm->card || !dapm->card->instantiated)
2423 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2425 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2428 * snd_soc_dapm_sync - scan and power dapm paths
2429 * @dapm: DAPM context
2431 * Walks all dapm audio paths and powers widgets according to their
2432 * stream or path usage.
2434 * Returns 0 for success.
2436 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2440 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2441 ret = snd_soc_dapm_sync_unlocked(dapm);
2442 mutex_unlock(&dapm->card->dapm_mutex);
2445 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2448 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2449 * @w: The widget for which to update the flags
2451 * Some widgets have a dynamic category which depends on which neighbors they
2452 * are connected to. This function update the category for these widgets.
2454 * This function must be called whenever a path is added or removed to a widget.
2456 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2458 enum snd_soc_dapm_direction dir;
2459 struct snd_soc_dapm_path *p;
2463 case snd_soc_dapm_input:
2464 /* On a fully routed card a input is never a source */
2465 if (w->dapm->card->fully_routed)
2467 ep = SND_SOC_DAPM_EP_SOURCE;
2468 snd_soc_dapm_widget_for_each_source_path(w, p) {
2469 if (p->source->id == snd_soc_dapm_micbias ||
2470 p->source->id == snd_soc_dapm_mic ||
2471 p->source->id == snd_soc_dapm_line ||
2472 p->source->id == snd_soc_dapm_output) {
2478 case snd_soc_dapm_output:
2479 /* On a fully routed card a output is never a sink */
2480 if (w->dapm->card->fully_routed)
2482 ep = SND_SOC_DAPM_EP_SINK;
2483 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2484 if (p->sink->id == snd_soc_dapm_spk ||
2485 p->sink->id == snd_soc_dapm_hp ||
2486 p->sink->id == snd_soc_dapm_line ||
2487 p->sink->id == snd_soc_dapm_input) {
2493 case snd_soc_dapm_line:
2495 snd_soc_dapm_for_each_direction(dir) {
2496 if (!list_empty(&w->edges[dir]))
2497 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2507 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2508 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2509 const char *control)
2511 bool dynamic_source = false;
2512 bool dynamic_sink = false;
2517 switch (source->id) {
2518 case snd_soc_dapm_demux:
2519 dynamic_source = true;
2526 case snd_soc_dapm_mux:
2527 case snd_soc_dapm_switch:
2528 case snd_soc_dapm_mixer:
2529 case snd_soc_dapm_mixer_named_ctl:
2530 dynamic_sink = true;
2536 if (dynamic_source && dynamic_sink) {
2538 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2539 source->name, control, sink->name);
2541 } else if (!dynamic_source && !dynamic_sink) {
2543 "Control not supported for path %s -> [%s] -> %s\n",
2544 source->name, control, sink->name);
2551 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2552 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2553 const char *control,
2554 int (*connected)(struct snd_soc_dapm_widget *source,
2555 struct snd_soc_dapm_widget *sink))
2557 struct snd_soc_dapm_widget *widgets[2];
2558 enum snd_soc_dapm_direction dir;
2559 struct snd_soc_dapm_path *path;
2562 if (wsink->is_supply && !wsource->is_supply) {
2564 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2565 wsource->name, wsink->name);
2569 if (connected && !wsource->is_supply) {
2571 "connected() callback only supported for supply widgets (%s -> %s)\n",
2572 wsource->name, wsink->name);
2576 if (wsource->is_supply && control) {
2578 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2579 wsource->name, control, wsink->name);
2583 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2587 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2591 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2592 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2593 widgets[SND_SOC_DAPM_DIR_IN] = wsource;
2594 widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
2596 path->connected = connected;
2597 INIT_LIST_HEAD(&path->list);
2598 INIT_LIST_HEAD(&path->list_kcontrol);
2600 if (wsource->is_supply || wsink->is_supply)
2601 path->is_supply = 1;
2603 /* connect static paths */
2604 if (control == NULL) {
2607 switch (wsource->id) {
2608 case snd_soc_dapm_demux:
2609 ret = dapm_connect_mux(dapm, path, control, wsource);
2617 switch (wsink->id) {
2618 case snd_soc_dapm_mux:
2619 ret = dapm_connect_mux(dapm, path, control, wsink);
2623 case snd_soc_dapm_switch:
2624 case snd_soc_dapm_mixer:
2625 case snd_soc_dapm_mixer_named_ctl:
2626 ret = dapm_connect_mixer(dapm, path, control);
2635 list_add(&path->list, &dapm->card->paths);
2636 snd_soc_dapm_for_each_direction(dir)
2637 list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
2639 snd_soc_dapm_for_each_direction(dir) {
2640 dapm_update_widget_flags(widgets[dir]);
2641 dapm_mark_dirty(widgets[dir], "Route added");
2644 if (dapm->card->instantiated && path->connect)
2645 dapm_path_invalidate(path);
2653 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2654 const struct snd_soc_dapm_route *route)
2656 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2657 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2660 char prefixed_sink[80];
2661 char prefixed_source[80];
2665 prefix = soc_dapm_prefix(dapm);
2667 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2668 prefix, route->sink);
2669 sink = prefixed_sink;
2670 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2671 prefix, route->source);
2672 source = prefixed_source;
2675 source = route->source;
2678 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2679 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2681 if (wsink && wsource)
2685 * find src and dest widgets over all widgets but favor a widget from
2686 * current DAPM context
2688 list_for_each_entry(w, &dapm->card->widgets, list) {
2689 if (!wsink && !(strcmp(w->name, sink))) {
2691 if (w->dapm == dapm) {
2698 if (!wsource && !(strcmp(w->name, source))) {
2700 if (w->dapm == dapm) {
2707 /* use widget from another DAPM context if not found from this */
2713 if (wsource == NULL) {
2714 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2718 if (wsink == NULL) {
2719 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2725 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2726 dapm_wcache_update(&dapm->path_source_cache, wsource);
2728 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2735 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2736 source, route->control, sink);
2740 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2741 const struct snd_soc_dapm_route *route)
2743 struct snd_soc_dapm_widget *wsource, *wsink;
2744 struct snd_soc_dapm_path *path, *p;
2747 char prefixed_sink[80];
2748 char prefixed_source[80];
2751 if (route->control) {
2753 "ASoC: Removal of routes with controls not supported\n");
2757 prefix = soc_dapm_prefix(dapm);
2759 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2760 prefix, route->sink);
2761 sink = prefixed_sink;
2762 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2763 prefix, route->source);
2764 source = prefixed_source;
2767 source = route->source;
2771 list_for_each_entry(p, &dapm->card->paths, list) {
2772 if (strcmp(p->source->name, source) != 0)
2774 if (strcmp(p->sink->name, sink) != 0)
2781 wsource = path->source;
2784 dapm_mark_dirty(wsource, "Route removed");
2785 dapm_mark_dirty(wsink, "Route removed");
2787 dapm_path_invalidate(path);
2789 dapm_free_path(path);
2791 /* Update any path related flags */
2792 dapm_update_widget_flags(wsource);
2793 dapm_update_widget_flags(wsink);
2795 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2803 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2804 * @dapm: DAPM context
2805 * @route: audio routes
2806 * @num: number of routes
2808 * Connects 2 dapm widgets together via a named audio path. The sink is
2809 * the widget receiving the audio signal, whilst the source is the sender
2810 * of the audio signal.
2812 * Returns 0 for success else error. On error all resources can be freed
2813 * with a call to snd_soc_card_free().
2815 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2816 const struct snd_soc_dapm_route *route, int num)
2820 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2821 for (i = 0; i < num; i++) {
2822 r = snd_soc_dapm_add_route(dapm, route);
2824 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2826 route->control ? route->control : "direct",
2832 mutex_unlock(&dapm->card->dapm_mutex);
2836 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2839 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2840 * @dapm: DAPM context
2841 * @route: audio routes
2842 * @num: number of routes
2844 * Removes routes from the DAPM context.
2846 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2847 const struct snd_soc_dapm_route *route, int num)
2851 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2852 for (i = 0; i < num; i++) {
2853 snd_soc_dapm_del_route(dapm, route);
2856 mutex_unlock(&dapm->card->dapm_mutex);
2860 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2862 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2863 const struct snd_soc_dapm_route *route)
2865 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2868 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2871 struct snd_soc_dapm_path *path;
2875 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2881 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2886 if (route->control || route->connected)
2887 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2888 route->source, route->sink);
2890 snd_soc_dapm_widget_for_each_sink_path(source, path) {
2891 if (path->sink == sink) {
2898 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2899 route->source, route->sink);
2901 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2902 count, route->source, route->sink);
2908 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2909 * @dapm: DAPM context
2910 * @route: audio routes
2911 * @num: number of routes
2913 * Mark existing routes matching those specified in the passed array
2914 * as being weak, meaning that they are ignored for the purpose of
2915 * power decisions. The main intended use case is for sidetone paths
2916 * which couple audio between other independent paths if they are both
2917 * active in order to make the combination work better at the user
2918 * level but which aren't intended to be "used".
2920 * Note that CODEC drivers should not use this as sidetone type paths
2921 * can frequently also be used as bypass paths.
2923 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2924 const struct snd_soc_dapm_route *route, int num)
2929 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2930 for (i = 0; i < num; i++) {
2931 err = snd_soc_dapm_weak_route(dapm, route);
2936 mutex_unlock(&dapm->card->dapm_mutex);
2940 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2943 * snd_soc_dapm_new_widgets - add new dapm widgets
2944 * @card: card to be checked for new dapm widgets
2946 * Checks the codec for any new dapm widgets and creates them if found.
2948 * Returns 0 for success.
2950 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2952 struct snd_soc_dapm_widget *w;
2955 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2957 list_for_each_entry(w, &card->widgets, list)
2962 if (w->num_kcontrols) {
2963 w->kcontrols = kzalloc(w->num_kcontrols *
2964 sizeof(struct snd_kcontrol *),
2966 if (!w->kcontrols) {
2967 mutex_unlock(&card->dapm_mutex);
2973 case snd_soc_dapm_switch:
2974 case snd_soc_dapm_mixer:
2975 case snd_soc_dapm_mixer_named_ctl:
2978 case snd_soc_dapm_mux:
2979 case snd_soc_dapm_demux:
2982 case snd_soc_dapm_pga:
2983 case snd_soc_dapm_out_drv:
2986 case snd_soc_dapm_dai_link:
2987 dapm_new_dai_link(w);
2993 /* Read the initial power state from the device */
2995 soc_dapm_read(w->dapm, w->reg, &val);
2996 val = val >> w->shift;
2998 if (val == w->on_val)
3004 dapm_mark_dirty(w, "new widget");
3005 dapm_debugfs_add_widget(w);
3008 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
3009 mutex_unlock(&card->dapm_mutex);
3012 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
3015 * snd_soc_dapm_get_volsw - dapm mixer get callback
3016 * @kcontrol: mixer control
3017 * @ucontrol: control element information
3019 * Callback to get the value of a dapm mixer control.
3021 * Returns 0 for success.
3023 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3024 struct snd_ctl_elem_value *ucontrol)
3026 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3027 struct snd_soc_card *card = dapm->card;
3028 struct soc_mixer_control *mc =
3029 (struct soc_mixer_control *)kcontrol->private_value;
3031 unsigned int shift = mc->shift;
3033 unsigned int mask = (1 << fls(max)) - 1;
3034 unsigned int invert = mc->invert;
3038 if (snd_soc_volsw_is_stereo(mc))
3040 "ASoC: Control '%s' is stereo, which is not supported\n",
3043 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3044 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3045 ret = soc_dapm_read(dapm, reg, &val);
3046 val = (val >> shift) & mask;
3048 val = dapm_kcontrol_get_value(kcontrol);
3050 mutex_unlock(&card->dapm_mutex);
3056 ucontrol->value.integer.value[0] = max - val;
3058 ucontrol->value.integer.value[0] = val;
3062 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3065 * snd_soc_dapm_put_volsw - dapm mixer set callback
3066 * @kcontrol: mixer control
3067 * @ucontrol: control element information
3069 * Callback to set the value of a dapm mixer control.
3071 * Returns 0 for success.
3073 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3074 struct snd_ctl_elem_value *ucontrol)
3076 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3077 struct snd_soc_card *card = dapm->card;
3078 struct soc_mixer_control *mc =
3079 (struct soc_mixer_control *)kcontrol->private_value;
3081 unsigned int shift = mc->shift;
3083 unsigned int mask = (1 << fls(max)) - 1;
3084 unsigned int invert = mc->invert;
3086 int connect, change, reg_change = 0;
3087 struct snd_soc_dapm_update update;
3090 if (snd_soc_volsw_is_stereo(mc))
3092 "ASoC: Control '%s' is stereo, which is not supported\n",
3095 val = (ucontrol->value.integer.value[0] & mask);
3101 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3103 change = dapm_kcontrol_set_value(kcontrol, val);
3105 if (reg != SND_SOC_NOPM) {
3106 mask = mask << shift;
3109 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3112 if (change || reg_change) {
3114 update.kcontrol = kcontrol;
3118 card->update = &update;
3120 change |= reg_change;
3122 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3124 card->update = NULL;
3127 mutex_unlock(&card->dapm_mutex);
3130 soc_dpcm_runtime_update(card);
3134 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3137 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3138 * @kcontrol: mixer control
3139 * @ucontrol: control element information
3141 * Callback to get the value of a dapm enumerated double mixer control.
3143 * Returns 0 for success.
3145 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3146 struct snd_ctl_elem_value *ucontrol)
3148 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3149 struct snd_soc_card *card = dapm->card;
3150 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3151 unsigned int reg_val, val;
3153 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3154 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3155 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3157 mutex_unlock(&card->dapm_mutex);
3161 reg_val = dapm_kcontrol_get_value(kcontrol);
3163 mutex_unlock(&card->dapm_mutex);
3165 val = (reg_val >> e->shift_l) & e->mask;
3166 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3167 if (e->shift_l != e->shift_r) {
3168 val = (reg_val >> e->shift_r) & e->mask;
3169 val = snd_soc_enum_val_to_item(e, val);
3170 ucontrol->value.enumerated.item[1] = val;
3175 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3178 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3179 * @kcontrol: mixer control
3180 * @ucontrol: control element information
3182 * Callback to set the value of a dapm enumerated double mixer control.
3184 * Returns 0 for success.
3186 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3187 struct snd_ctl_elem_value *ucontrol)
3189 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3190 struct snd_soc_card *card = dapm->card;
3191 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3192 unsigned int *item = ucontrol->value.enumerated.item;
3193 unsigned int val, change, reg_change = 0;
3195 struct snd_soc_dapm_update update;
3198 if (item[0] >= e->items)
3201 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3202 mask = e->mask << e->shift_l;
3203 if (e->shift_l != e->shift_r) {
3204 if (item[1] > e->items)
3206 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3207 mask |= e->mask << e->shift_r;
3210 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3212 change = dapm_kcontrol_set_value(kcontrol, val);
3214 if (e->reg != SND_SOC_NOPM)
3215 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3217 if (change || reg_change) {
3219 update.kcontrol = kcontrol;
3220 update.reg = e->reg;
3223 card->update = &update;
3225 change |= reg_change;
3227 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3229 card->update = NULL;
3232 mutex_unlock(&card->dapm_mutex);
3235 soc_dpcm_runtime_update(card);
3239 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3242 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3244 * @kcontrol: mixer control
3245 * @uinfo: control element information
3247 * Callback to provide information about a pin switch control.
3249 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3250 struct snd_ctl_elem_info *uinfo)
3252 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3254 uinfo->value.integer.min = 0;
3255 uinfo->value.integer.max = 1;
3259 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3262 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3264 * @kcontrol: mixer control
3267 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3268 struct snd_ctl_elem_value *ucontrol)
3270 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3271 const char *pin = (const char *)kcontrol->private_value;
3273 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3275 ucontrol->value.integer.value[0] =
3276 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3278 mutex_unlock(&card->dapm_mutex);
3282 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3285 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3287 * @kcontrol: mixer control
3290 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3291 struct snd_ctl_elem_value *ucontrol)
3293 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3294 const char *pin = (const char *)kcontrol->private_value;
3297 if (ucontrol->value.integer.value[0])
3298 ret = snd_soc_dapm_enable_pin(&card->dapm, pin);
3300 ret = snd_soc_dapm_disable_pin(&card->dapm, pin);
3302 snd_soc_dapm_sync(&card->dapm);
3305 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3307 struct snd_soc_dapm_widget *
3308 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3309 const struct snd_soc_dapm_widget *widget)
3311 struct snd_soc_dapm_widget *w;
3313 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3314 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3315 /* Do not nag about probe deferrals */
3317 int ret = PTR_ERR(w);
3319 if (ret != -EPROBE_DEFER)
3321 "ASoC: Failed to create DAPM control %s (%d)\n",
3327 "ASoC: Failed to create DAPM control %s\n",
3331 mutex_unlock(&dapm->card->dapm_mutex);
3335 struct snd_soc_dapm_widget *
3336 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3337 const struct snd_soc_dapm_widget *widget)
3339 enum snd_soc_dapm_direction dir;
3340 struct snd_soc_dapm_widget *w;
3344 if ((w = dapm_cnew_widget(widget)) == NULL)
3348 case snd_soc_dapm_regulator_supply:
3349 w->regulator = devm_regulator_get(dapm->dev, w->name);
3350 if (IS_ERR(w->regulator)) {
3351 ret = PTR_ERR(w->regulator);
3352 if (ret == -EPROBE_DEFER)
3353 return ERR_PTR(ret);
3354 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3359 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3360 ret = regulator_allow_bypass(w->regulator, true);
3362 dev_warn(w->dapm->dev,
3363 "ASoC: Failed to bypass %s: %d\n",
3367 case snd_soc_dapm_clock_supply:
3368 #ifdef CONFIG_CLKDEV_LOOKUP
3369 w->clk = devm_clk_get(dapm->dev, w->name);
3370 if (IS_ERR(w->clk)) {
3371 ret = PTR_ERR(w->clk);
3372 if (ret == -EPROBE_DEFER)
3373 return ERR_PTR(ret);
3374 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3386 prefix = soc_dapm_prefix(dapm);
3388 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3390 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3391 if (w->name == NULL) {
3397 case snd_soc_dapm_mic:
3398 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3399 w->power_check = dapm_generic_check_power;
3401 case snd_soc_dapm_input:
3402 if (!dapm->card->fully_routed)
3403 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3404 w->power_check = dapm_generic_check_power;
3406 case snd_soc_dapm_spk:
3407 case snd_soc_dapm_hp:
3408 w->is_ep = SND_SOC_DAPM_EP_SINK;
3409 w->power_check = dapm_generic_check_power;
3411 case snd_soc_dapm_output:
3412 if (!dapm->card->fully_routed)
3413 w->is_ep = SND_SOC_DAPM_EP_SINK;
3414 w->power_check = dapm_generic_check_power;
3416 case snd_soc_dapm_vmid:
3417 case snd_soc_dapm_siggen:
3418 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3419 w->power_check = dapm_always_on_check_power;
3421 case snd_soc_dapm_mux:
3422 case snd_soc_dapm_demux:
3423 case snd_soc_dapm_switch:
3424 case snd_soc_dapm_mixer:
3425 case snd_soc_dapm_mixer_named_ctl:
3426 case snd_soc_dapm_adc:
3427 case snd_soc_dapm_aif_out:
3428 case snd_soc_dapm_dac:
3429 case snd_soc_dapm_aif_in:
3430 case snd_soc_dapm_pga:
3431 case snd_soc_dapm_out_drv:
3432 case snd_soc_dapm_micbias:
3433 case snd_soc_dapm_line:
3434 case snd_soc_dapm_dai_link:
3435 case snd_soc_dapm_dai_out:
3436 case snd_soc_dapm_dai_in:
3437 w->power_check = dapm_generic_check_power;
3439 case snd_soc_dapm_supply:
3440 case snd_soc_dapm_regulator_supply:
3441 case snd_soc_dapm_clock_supply:
3442 case snd_soc_dapm_kcontrol:
3444 w->power_check = dapm_supply_check_power;
3447 w->power_check = dapm_always_on_check_power;
3452 INIT_LIST_HEAD(&w->list);
3453 INIT_LIST_HEAD(&w->dirty);
3454 list_add_tail(&w->list, &dapm->card->widgets);
3456 snd_soc_dapm_for_each_direction(dir) {
3457 INIT_LIST_HEAD(&w->edges[dir]);
3458 w->endpoints[dir] = -1;
3461 /* machine layer set ups unconnected pins and insertions */
3467 * snd_soc_dapm_new_controls - create new dapm controls
3468 * @dapm: DAPM context
3469 * @widget: widget array
3470 * @num: number of widgets
3472 * Creates new DAPM controls based upon the templates.
3474 * Returns 0 for success else error.
3476 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3477 const struct snd_soc_dapm_widget *widget,
3480 struct snd_soc_dapm_widget *w;
3484 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3485 for (i = 0; i < num; i++) {
3486 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3489 /* Do not nag about probe deferrals */
3490 if (ret == -EPROBE_DEFER)
3493 "ASoC: Failed to create DAPM control %s (%d)\n",
3499 "ASoC: Failed to create DAPM control %s\n",
3506 mutex_unlock(&dapm->card->dapm_mutex);
3509 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3511 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3512 struct snd_kcontrol *kcontrol, int event)
3514 struct snd_soc_dapm_path *source_p, *sink_p;
3515 struct snd_soc_dai *source, *sink;
3516 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3517 struct snd_pcm_substream substream;
3518 struct snd_pcm_hw_params *params = NULL;
3522 if (WARN_ON(!config) ||
3523 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3524 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3527 /* We only support a single source and sink, pick the first */
3528 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
3529 struct snd_soc_dapm_path,
3530 list_node[SND_SOC_DAPM_DIR_OUT]);
3531 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
3532 struct snd_soc_dapm_path,
3533 list_node[SND_SOC_DAPM_DIR_IN]);
3535 source = source_p->source->priv;
3536 sink = sink_p->sink->priv;
3538 /* Be a little careful as we don't want to overflow the mask array */
3539 if (config->formats) {
3540 fmt = ffs(config->formats) - 1;
3542 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3547 /* Currently very limited parameter selection */
3548 params = kzalloc(sizeof(*params), GFP_KERNEL);
3553 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3555 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3557 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3560 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3561 = config->channels_min;
3562 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3563 = config->channels_max;
3565 memset(&substream, 0, sizeof(substream));
3568 case SND_SOC_DAPM_PRE_PMU:
3569 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3570 if (source->driver->ops && source->driver->ops->startup) {
3571 ret = source->driver->ops->startup(&substream, source);
3573 dev_err(source->dev,
3574 "ASoC: startup() failed: %d\n", ret);
3579 ret = soc_dai_hw_params(&substream, params, source);
3583 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3584 if (sink->driver->ops && sink->driver->ops->startup) {
3585 ret = sink->driver->ops->startup(&substream, sink);
3588 "ASoC: startup() failed: %d\n", ret);
3593 ret = soc_dai_hw_params(&substream, params, sink);
3598 case SND_SOC_DAPM_POST_PMU:
3599 ret = snd_soc_dai_digital_mute(sink, 0,
3600 SNDRV_PCM_STREAM_PLAYBACK);
3601 if (ret != 0 && ret != -ENOTSUPP)
3602 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3606 case SND_SOC_DAPM_PRE_PMD:
3607 ret = snd_soc_dai_digital_mute(sink, 1,
3608 SNDRV_PCM_STREAM_PLAYBACK);
3609 if (ret != 0 && ret != -ENOTSUPP)
3610 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3614 if (source->driver->ops && source->driver->ops->shutdown) {
3615 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3616 source->driver->ops->shutdown(&substream, source);
3620 if (sink->driver->ops && sink->driver->ops->shutdown) {
3621 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3622 sink->driver->ops->shutdown(&substream, sink);
3627 WARN(1, "Unknown event %d\n", event);
3636 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3637 struct snd_ctl_elem_value *ucontrol)
3639 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3641 ucontrol->value.enumerated.item[0] = w->params_select;
3646 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3647 struct snd_ctl_elem_value *ucontrol)
3649 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3651 /* Can't change the config when widget is already powered */
3655 if (ucontrol->value.enumerated.item[0] == w->params_select)
3658 if (ucontrol->value.enumerated.item[0] >= w->num_params)
3661 w->params_select = ucontrol->value.enumerated.item[0];
3666 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3667 const struct snd_soc_pcm_stream *params,
3668 unsigned int num_params,
3669 struct snd_soc_dapm_widget *source,
3670 struct snd_soc_dapm_widget *sink)
3672 struct snd_soc_dapm_widget template;
3673 struct snd_soc_dapm_widget *w;
3676 unsigned long private_value;
3677 const char **w_param_text;
3678 struct soc_enum w_param_enum[] = {
3679 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3681 struct snd_kcontrol_new kcontrol_dai_link[] = {
3682 SOC_ENUM_EXT(NULL, w_param_enum[0],
3683 snd_soc_dapm_dai_link_get,
3684 snd_soc_dapm_dai_link_put),
3686 const struct snd_soc_pcm_stream *config = params;
3688 w_param_text = devm_kcalloc(card->dev, num_params,
3689 sizeof(char *), GFP_KERNEL);
3693 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3694 source->name, sink->name);
3697 goto outfree_w_param;
3700 for (count = 0 ; count < num_params; count++) {
3701 if (!config->stream_name) {
3702 dev_warn(card->dapm.dev,
3703 "ASoC: anonymous config %d for dai link %s\n",
3705 w_param_text[count] =
3706 devm_kasprintf(card->dev, GFP_KERNEL,
3707 "Anonymous Configuration %d",
3709 if (!w_param_text[count]) {
3711 goto outfree_link_name;
3714 w_param_text[count] = devm_kmemdup(card->dev,
3715 config->stream_name,
3716 strlen(config->stream_name) + 1,
3718 if (!w_param_text[count]) {
3720 goto outfree_link_name;
3725 w_param_enum[0].items = num_params;
3726 w_param_enum[0].texts = w_param_text;
3728 memset(&template, 0, sizeof(template));
3729 template.reg = SND_SOC_NOPM;
3730 template.id = snd_soc_dapm_dai_link;
3731 template.name = link_name;
3732 template.event = snd_soc_dai_link_event;
3733 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3734 SND_SOC_DAPM_PRE_PMD;
3735 template.num_kcontrols = 1;
3736 /* duplicate w_param_enum on heap so that memory persists */
3738 (unsigned long) devm_kmemdup(card->dev,
3739 (void *)(kcontrol_dai_link[0].private_value),
3740 sizeof(struct soc_enum), GFP_KERNEL);
3741 if (!private_value) {
3742 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3745 goto outfree_link_name;
3747 kcontrol_dai_link[0].private_value = private_value;
3748 /* duplicate kcontrol_dai_link on heap so that memory persists */
3749 template.kcontrol_news =
3750 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3751 sizeof(struct snd_kcontrol_new),
3753 if (!template.kcontrol_news) {
3754 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3757 goto outfree_private_value;
3760 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3762 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3765 /* Do not nag about probe deferrals */
3766 if (ret != -EPROBE_DEFER)
3768 "ASoC: Failed to create %s widget (%d)\n",
3770 goto outfree_kcontrol_news;
3773 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3776 goto outfree_kcontrol_news;
3780 w->num_params = num_params;
3782 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3785 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3788 devm_kfree(card->dev, w);
3789 outfree_kcontrol_news:
3790 devm_kfree(card->dev, (void *)template.kcontrol_news);
3791 outfree_private_value:
3792 devm_kfree(card->dev, (void *)private_value);
3794 devm_kfree(card->dev, link_name);
3796 for (count = 0 ; count < num_params; count++)
3797 devm_kfree(card->dev, (void *)w_param_text[count]);
3798 devm_kfree(card->dev, w_param_text);
3803 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3804 struct snd_soc_dai *dai)
3806 struct snd_soc_dapm_widget template;
3807 struct snd_soc_dapm_widget *w;
3809 WARN_ON(dapm->dev != dai->dev);
3811 memset(&template, 0, sizeof(template));
3812 template.reg = SND_SOC_NOPM;
3814 if (dai->driver->playback.stream_name) {
3815 template.id = snd_soc_dapm_dai_in;
3816 template.name = dai->driver->playback.stream_name;
3817 template.sname = dai->driver->playback.stream_name;
3819 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3822 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3824 int ret = PTR_ERR(w);
3826 /* Do not nag about probe deferrals */
3827 if (ret != -EPROBE_DEFER)
3829 "ASoC: Failed to create %s widget (%d)\n",
3830 dai->driver->playback.stream_name, ret);
3834 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3835 dai->driver->playback.stream_name);
3840 dai->playback_widget = w;
3843 if (dai->driver->capture.stream_name) {
3844 template.id = snd_soc_dapm_dai_out;
3845 template.name = dai->driver->capture.stream_name;
3846 template.sname = dai->driver->capture.stream_name;
3848 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3851 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3853 int ret = PTR_ERR(w);
3855 /* Do not nag about probe deferrals */
3856 if (ret != -EPROBE_DEFER)
3858 "ASoC: Failed to create %s widget (%d)\n",
3859 dai->driver->playback.stream_name, ret);
3863 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3864 dai->driver->capture.stream_name);
3869 dai->capture_widget = w;
3875 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3877 struct snd_soc_dapm_widget *dai_w, *w;
3878 struct snd_soc_dapm_widget *src, *sink;
3879 struct snd_soc_dai *dai;
3881 /* For each DAI widget... */
3882 list_for_each_entry(dai_w, &card->widgets, list) {
3883 switch (dai_w->id) {
3884 case snd_soc_dapm_dai_in:
3885 case snd_soc_dapm_dai_out:
3891 /* let users know there is no DAI to link */
3893 dev_dbg(card->dev, "dai widget %s has no DAI\n",
3900 /* ...find all widgets with the same stream and link them */
3901 list_for_each_entry(w, &card->widgets, list) {
3902 if (w->dapm != dai_w->dapm)
3906 case snd_soc_dapm_dai_in:
3907 case snd_soc_dapm_dai_out:
3913 if (!w->sname || !strstr(w->sname, dai_w->sname))
3916 if (dai_w->id == snd_soc_dapm_dai_in) {
3923 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3924 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3931 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3932 struct snd_soc_pcm_runtime *rtd)
3934 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3935 struct snd_soc_dapm_widget *sink, *source;
3938 for (i = 0; i < rtd->num_codecs; i++) {
3939 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3941 /* connect BE DAI playback if widgets are valid */
3942 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3943 source = cpu_dai->playback_widget;
3944 sink = codec_dai->playback_widget;
3945 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3946 cpu_dai->component->name, source->name,
3947 codec_dai->component->name, sink->name);
3949 snd_soc_dapm_add_path(&card->dapm, source, sink,
3953 /* connect BE DAI capture if widgets are valid */
3954 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3955 source = codec_dai->capture_widget;
3956 sink = cpu_dai->capture_widget;
3957 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3958 codec_dai->component->name, source->name,
3959 cpu_dai->component->name, sink->name);
3961 snd_soc_dapm_add_path(&card->dapm, source, sink,
3967 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3970 struct snd_soc_dapm_widget *w;
3973 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3974 w = dai->playback_widget;
3976 w = dai->capture_widget;
3979 dapm_mark_dirty(w, "stream event");
3981 if (w->id == snd_soc_dapm_dai_in) {
3982 ep = SND_SOC_DAPM_EP_SOURCE;
3983 dapm_widget_invalidate_input_paths(w);
3985 ep = SND_SOC_DAPM_EP_SINK;
3986 dapm_widget_invalidate_output_paths(w);
3990 case SND_SOC_DAPM_STREAM_START:
3994 case SND_SOC_DAPM_STREAM_STOP:
3998 case SND_SOC_DAPM_STREAM_SUSPEND:
3999 case SND_SOC_DAPM_STREAM_RESUME:
4000 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
4001 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
4007 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
4009 struct snd_soc_pcm_runtime *rtd = card->rtd;
4012 /* for each BE DAI link... */
4013 for (i = 0; i < card->num_rtd; i++) {
4014 rtd = &card->rtd[i];
4017 * dynamic FE links have no fixed DAI mapping.
4018 * CODEC<->CODEC links have no direct connection.
4020 if (rtd->dai_link->dynamic || rtd->dai_link->params)
4023 dapm_connect_dai_link_widgets(card, rtd);
4027 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4032 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
4033 for (i = 0; i < rtd->num_codecs; i++)
4034 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
4036 dapm_power_widgets(rtd->card, event);
4040 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4041 * @rtd: PCM runtime data
4042 * @stream: stream name
4043 * @event: stream event
4045 * Sends a stream event to the dapm core. The core then makes any
4046 * necessary widget power changes.
4048 * Returns 0 for success else error.
4050 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4053 struct snd_soc_card *card = rtd->card;
4055 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4056 soc_dapm_stream_event(rtd, stream, event);
4057 mutex_unlock(&card->dapm_mutex);
4061 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4062 * @dapm: DAPM context
4065 * Enables input/output pin and its parents or children widgets iff there is
4066 * a valid audio route and active audio stream.
4068 * Requires external locking.
4070 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4071 * do any widget power switching.
4073 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4076 return snd_soc_dapm_set_pin(dapm, pin, 1);
4078 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4081 * snd_soc_dapm_enable_pin - enable pin.
4082 * @dapm: DAPM context
4085 * Enables input/output pin and its parents or children widgets iff there is
4086 * a valid audio route and active audio stream.
4088 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4089 * do any widget power switching.
4091 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4095 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4097 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4099 mutex_unlock(&dapm->card->dapm_mutex);
4103 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4106 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4107 * @dapm: DAPM context
4110 * Enables input/output pin regardless of any other state. This is
4111 * intended for use with microphone bias supplies used in microphone
4114 * Requires external locking.
4116 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4117 * do any widget power switching.
4119 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4122 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4125 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4129 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4130 if (!w->connected) {
4132 * w->force does not affect the number of input or output paths,
4133 * so we only have to recheck if w->connected is changed
4135 dapm_widget_invalidate_input_paths(w);
4136 dapm_widget_invalidate_output_paths(w);
4140 dapm_mark_dirty(w, "force enable");
4144 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4147 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4148 * @dapm: DAPM context
4151 * Enables input/output pin regardless of any other state. This is
4152 * intended for use with microphone bias supplies used in microphone
4155 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4156 * do any widget power switching.
4158 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4163 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4165 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4167 mutex_unlock(&dapm->card->dapm_mutex);
4171 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4174 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4175 * @dapm: DAPM context
4178 * Disables input/output pin and its parents or children widgets.
4180 * Requires external locking.
4182 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4183 * do any widget power switching.
4185 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4188 return snd_soc_dapm_set_pin(dapm, pin, 0);
4190 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4193 * snd_soc_dapm_disable_pin - disable pin.
4194 * @dapm: DAPM context
4197 * Disables input/output pin and its parents or children widgets.
4199 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4200 * do any widget power switching.
4202 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4207 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4209 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4211 mutex_unlock(&dapm->card->dapm_mutex);
4215 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4218 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4219 * @dapm: DAPM context
4222 * Marks the specified pin as being not connected, disabling it along
4223 * any parent or child widgets. At present this is identical to
4224 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4225 * additional things such as disabling controls which only affect
4226 * paths through the pin.
4228 * Requires external locking.
4230 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4231 * do any widget power switching.
4233 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4236 return snd_soc_dapm_set_pin(dapm, pin, 0);
4238 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4241 * snd_soc_dapm_nc_pin - permanently disable pin.
4242 * @dapm: DAPM context
4245 * Marks the specified pin as being not connected, disabling it along
4246 * any parent or child widgets. At present this is identical to
4247 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4248 * additional things such as disabling controls which only affect
4249 * paths through the pin.
4251 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4252 * do any widget power switching.
4254 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4258 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4260 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4262 mutex_unlock(&dapm->card->dapm_mutex);
4266 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4269 * snd_soc_dapm_get_pin_status - get audio pin status
4270 * @dapm: DAPM context
4271 * @pin: audio signal pin endpoint (or start point)
4273 * Get audio pin status - connected or disconnected.
4275 * Returns 1 for connected otherwise 0.
4277 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4280 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4283 return w->connected;
4287 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4290 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4291 * @dapm: DAPM context
4292 * @pin: audio signal pin endpoint (or start point)
4294 * Mark the given endpoint or pin as ignoring suspend. When the
4295 * system is disabled a path between two endpoints flagged as ignoring
4296 * suspend will not be disabled. The path must already be enabled via
4297 * normal means at suspend time, it will not be turned on if it was not
4300 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4303 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4306 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4310 w->ignore_suspend = 1;
4314 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4317 * snd_soc_dapm_free - free dapm resources
4318 * @dapm: DAPM context
4320 * Free all dapm widgets and resources.
4322 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4324 dapm_debugfs_cleanup(dapm);
4325 dapm_free_widgets(dapm);
4326 list_del(&dapm->list);
4328 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4330 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4332 struct snd_soc_card *card = dapm->card;
4333 struct snd_soc_dapm_widget *w;
4334 LIST_HEAD(down_list);
4337 mutex_lock(&card->dapm_mutex);
4339 list_for_each_entry(w, &dapm->card->widgets, list) {
4340 if (w->dapm != dapm)
4343 dapm_seq_insert(w, &down_list, false);
4349 /* If there were no widgets to power down we're already in
4353 if (dapm->bias_level == SND_SOC_BIAS_ON)
4354 snd_soc_dapm_set_bias_level(dapm,
4355 SND_SOC_BIAS_PREPARE);
4356 dapm_seq_run(card, &down_list, 0, false);
4357 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4358 snd_soc_dapm_set_bias_level(dapm,
4359 SND_SOC_BIAS_STANDBY);
4362 mutex_unlock(&card->dapm_mutex);
4366 * snd_soc_dapm_shutdown - callback for system shutdown
4368 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4370 struct snd_soc_dapm_context *dapm;
4372 list_for_each_entry(dapm, &card->dapm_list, list) {
4373 if (dapm != &card->dapm) {
4374 soc_dapm_shutdown_dapm(dapm);
4375 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4376 snd_soc_dapm_set_bias_level(dapm,
4381 soc_dapm_shutdown_dapm(&card->dapm);
4382 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4383 snd_soc_dapm_set_bias_level(&card->dapm,
4387 /* Module information */
4388 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4389 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4390 MODULE_LICENSE("GPL");