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 << e->shift_l;
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 data->widget->on_val = value;
522 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
524 * @kcontrol: The kcontrol
526 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
527 struct snd_kcontrol *kcontrol)
529 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
531 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
534 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
536 * @kcontrol: The kcontrol
538 * Note: This function must only be used on kcontrols that are known to have
539 * been registered for a CODEC. Otherwise the behaviour is undefined.
541 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
542 struct snd_kcontrol *kcontrol)
544 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
546 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
548 static void dapm_reset(struct snd_soc_card *card)
550 struct snd_soc_dapm_widget *w;
552 lockdep_assert_held(&card->dapm_mutex);
554 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
556 list_for_each_entry(w, &card->widgets, list) {
557 w->new_power = w->power;
558 w->power_checked = false;
562 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
564 if (!dapm->component)
566 return dapm->component->name_prefix;
569 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
572 if (!dapm->component)
574 return snd_soc_component_read(dapm->component, reg, value);
577 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
578 int reg, unsigned int mask, unsigned int value)
580 if (!dapm->component)
582 return snd_soc_component_update_bits(dapm->component, reg,
586 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
587 int reg, unsigned int mask, unsigned int value)
589 if (!dapm->component)
591 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
594 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
597 snd_soc_component_async_complete(dapm->component);
600 static struct snd_soc_dapm_widget *
601 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
603 struct snd_soc_dapm_widget *w = wcache->widget;
604 struct list_head *wlist;
609 wlist = &w->dapm->card->widgets;
611 list_for_each_entry_from(w, wlist, list) {
612 if (!strcmp(name, w->name))
623 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
624 struct snd_soc_dapm_widget *w)
630 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
631 * @dapm: The DAPM context for which to set the level
632 * @level: The level to set
634 * Forces the DAPM bias level to a specific state. It will call the bias level
635 * callback of DAPM context with the specified level. This will even happen if
636 * the context is already at the same level. Furthermore it will not go through
637 * the normal bias level sequencing, meaning any intermediate states between the
638 * current and the target state will not be entered.
640 * Note that the change in bias level is only temporary and the next time
641 * snd_soc_dapm_sync() is called the state will be set to the level as
642 * determined by the DAPM core. The function is mainly intended to be used to
643 * used during probe or resume from suspend to power up the device so
644 * initialization can be done, before the DAPM core takes over.
646 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
647 enum snd_soc_bias_level level)
651 if (dapm->set_bias_level)
652 ret = dapm->set_bias_level(dapm, level);
655 dapm->bias_level = level;
659 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
662 * snd_soc_dapm_set_bias_level - set the bias level for the system
663 * @dapm: DAPM context
664 * @level: level to configure
666 * Configure the bias (power) levels for the SoC audio device.
668 * Returns 0 for success else error.
670 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
671 enum snd_soc_bias_level level)
673 struct snd_soc_card *card = dapm->card;
676 trace_snd_soc_bias_level_start(card, level);
678 if (card && card->set_bias_level)
679 ret = card->set_bias_level(card, dapm, level);
683 if (!card || dapm != &card->dapm)
684 ret = snd_soc_dapm_force_bias_level(dapm, level);
689 if (card && card->set_bias_level_post)
690 ret = card->set_bias_level_post(card, dapm, level);
692 trace_snd_soc_bias_level_done(card, level);
697 /* connect mux widget to its interconnecting audio paths */
698 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
699 struct snd_soc_dapm_path *path, const char *control_name,
700 struct snd_soc_dapm_widget *w)
702 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
703 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
704 unsigned int val, item;
707 if (e->reg != SND_SOC_NOPM) {
708 soc_dapm_read(dapm, e->reg, &val);
709 val = (val >> e->shift_l) & e->mask;
710 item = snd_soc_enum_val_to_item(e, val);
712 /* since a virtual mux has no backing registers to
713 * decide which path to connect, it will try to match
714 * with the first enumeration. This is to ensure
715 * that the default mux choice (the first) will be
716 * correctly powered up during initialization.
721 for (i = 0; i < e->items; i++) {
722 if (!(strcmp(control_name, e->texts[i]))) {
723 path->name = e->texts[i];
735 /* set up initial codec paths */
736 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
738 struct soc_mixer_control *mc = (struct soc_mixer_control *)
739 p->sink->kcontrol_news[i].private_value;
740 unsigned int reg = mc->reg;
741 unsigned int shift = mc->shift;
742 unsigned int max = mc->max;
743 unsigned int mask = (1 << fls(max)) - 1;
744 unsigned int invert = mc->invert;
747 if (reg != SND_SOC_NOPM) {
748 soc_dapm_read(p->sink->dapm, reg, &val);
749 val = (val >> shift) & mask;
758 /* connect mixer widget to its interconnecting audio paths */
759 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
760 struct snd_soc_dapm_path *path, const char *control_name)
764 /* search for mixer kcontrol */
765 for (i = 0; i < path->sink->num_kcontrols; i++) {
766 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
767 path->name = path->sink->kcontrol_news[i].name;
768 dapm_set_mixer_path_status(path, i);
775 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
776 struct snd_soc_dapm_widget *kcontrolw,
777 const struct snd_kcontrol_new *kcontrol_new,
778 struct snd_kcontrol **kcontrol)
780 struct snd_soc_dapm_widget *w;
785 list_for_each_entry(w, &dapm->card->widgets, list) {
786 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
788 for (i = 0; i < w->num_kcontrols; i++) {
789 if (&w->kcontrol_news[i] == kcontrol_new) {
791 *kcontrol = w->kcontrols[i];
801 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
802 * create it. Either way, add the widget into the control's widget list
804 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
807 struct snd_soc_dapm_context *dapm = w->dapm;
808 struct snd_card *card = dapm->card->snd_card;
812 struct snd_kcontrol *kcontrol;
813 bool wname_in_long_name, kcname_in_long_name;
814 char *long_name = NULL;
818 prefix = soc_dapm_prefix(dapm);
820 prefix_len = strlen(prefix) + 1;
824 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
829 wname_in_long_name = false;
830 kcname_in_long_name = true;
833 case snd_soc_dapm_switch:
834 case snd_soc_dapm_mixer:
835 case snd_soc_dapm_pga:
836 case snd_soc_dapm_out_drv:
837 wname_in_long_name = true;
838 kcname_in_long_name = true;
840 case snd_soc_dapm_mixer_named_ctl:
841 wname_in_long_name = false;
842 kcname_in_long_name = true;
844 case snd_soc_dapm_demux:
845 case snd_soc_dapm_mux:
846 wname_in_long_name = true;
847 kcname_in_long_name = false;
854 if (wname_in_long_name && kcname_in_long_name) {
856 * The control will get a prefix from the control
857 * creation process but we're also using the same
858 * prefix for widgets so cut the prefix off the
859 * front of the widget name.
861 long_name = kasprintf(GFP_KERNEL, "%s %s",
862 w->name + prefix_len,
863 w->kcontrol_news[kci].name);
864 if (long_name == NULL)
868 } else if (wname_in_long_name) {
870 name = w->name + prefix_len;
873 name = w->kcontrol_news[kci].name;
876 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
883 kcontrol->private_free = dapm_kcontrol_free;
885 ret = dapm_kcontrol_data_alloc(w, kcontrol);
887 snd_ctl_free_one(kcontrol);
891 ret = snd_ctl_add(card, kcontrol);
894 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
900 ret = dapm_kcontrol_add_widget(kcontrol, w);
902 w->kcontrols[kci] = kcontrol;
910 /* create new dapm mixer control */
911 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
914 struct snd_soc_dapm_path *path;
915 struct dapm_kcontrol_data *data;
918 for (i = 0; i < w->num_kcontrols; i++) {
920 snd_soc_dapm_widget_for_each_source_path(w, path) {
921 /* mixer/mux paths name must match control name */
922 if (path->name != (char *)w->kcontrol_news[i].name)
925 if (!w->kcontrols[i]) {
926 ret = dapm_create_or_share_kcontrol(w, i);
931 dapm_kcontrol_add_path(w->kcontrols[i], path);
933 data = snd_kcontrol_chip(w->kcontrols[i]);
935 snd_soc_dapm_add_path(data->widget->dapm,
945 /* create new dapm mux control */
946 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
948 struct snd_soc_dapm_context *dapm = w->dapm;
949 enum snd_soc_dapm_direction dir;
950 struct snd_soc_dapm_path *path;
955 case snd_soc_dapm_mux:
956 dir = SND_SOC_DAPM_DIR_OUT;
959 case snd_soc_dapm_demux:
960 dir = SND_SOC_DAPM_DIR_IN;
967 if (w->num_kcontrols != 1) {
969 "ASoC: %s %s has incorrect number of controls\n", type,
974 if (list_empty(&w->edges[dir])) {
975 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
979 ret = dapm_create_or_share_kcontrol(w, 0);
983 snd_soc_dapm_widget_for_each_path(w, dir, path) {
985 dapm_kcontrol_add_path(w->kcontrols[0], path);
991 /* create new dapm volume control */
992 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
996 for (i = 0; i < w->num_kcontrols; i++) {
997 ret = dapm_create_or_share_kcontrol(w, i);
1005 /* create new dapm dai link control */
1006 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1009 struct snd_kcontrol *kcontrol;
1010 struct snd_soc_dapm_context *dapm = w->dapm;
1011 struct snd_card *card = dapm->card->snd_card;
1013 /* create control for links with > 1 config */
1014 if (w->num_params <= 1)
1018 for (i = 0; i < w->num_kcontrols; i++) {
1019 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1021 ret = snd_ctl_add(card, kcontrol);
1024 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1025 w->name, w->kcontrol_news[i].name, ret);
1028 kcontrol->private_data = w;
1029 w->kcontrols[i] = kcontrol;
1035 /* We implement power down on suspend by checking the power state of
1036 * the ALSA card - when we are suspending the ALSA state for the card
1039 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1041 int level = snd_power_get_state(widget->dapm->card->snd_card);
1044 case SNDRV_CTL_POWER_D3hot:
1045 case SNDRV_CTL_POWER_D3cold:
1046 if (widget->ignore_suspend)
1047 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1049 return widget->ignore_suspend;
1055 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1056 struct list_head *widgets)
1058 struct snd_soc_dapm_widget *w;
1059 struct list_head *it;
1060 unsigned int size = 0;
1063 list_for_each(it, widgets)
1066 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1070 list_for_each_entry(w, widgets, work_list)
1071 (*list)->widgets[i++] = w;
1073 (*list)->num_widgets = i;
1079 * Common implementation for is_connected_output_ep() and
1080 * is_connected_input_ep(). The function is inlined since the combined size of
1081 * the two specialized functions is only marginally larger then the size of the
1082 * generic function and at the same time the fast path of the specialized
1083 * functions is significantly smaller than the generic function.
1085 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1086 struct list_head *list, enum snd_soc_dapm_direction dir,
1087 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *))
1089 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1090 struct snd_soc_dapm_path *path;
1093 if (widget->endpoints[dir] >= 0)
1094 return widget->endpoints[dir];
1096 DAPM_UPDATE_STAT(widget, path_checks);
1098 /* do we need to add this widget to the list ? */
1100 list_add_tail(&widget->work_list, list);
1102 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1103 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1104 return widget->endpoints[dir];
1107 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1108 DAPM_UPDATE_STAT(widget, neighbour_checks);
1110 if (path->weak || path->is_supply)
1116 trace_snd_soc_dapm_path(widget, dir, path);
1118 if (path->connect) {
1120 con += fn(path->node[dir], list);
1125 widget->endpoints[dir] = con;
1131 * Recursively check for a completed path to an active or physically connected
1132 * output widget. Returns number of complete paths.
1134 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1135 struct list_head *list)
1137 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1138 is_connected_output_ep);
1142 * Recursively check for a completed path to an active or physically connected
1143 * input widget. Returns number of complete paths.
1145 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1146 struct list_head *list)
1148 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1149 is_connected_input_ep);
1153 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1154 * @dai: the soc DAI.
1155 * @stream: stream direction.
1156 * @list: list of active widgets for this stream.
1158 * Queries DAPM graph as to whether an valid audio stream path exists for
1159 * the initial stream specified by name. This takes into account
1160 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1162 * Returns the number of valid paths or negative error.
1164 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1165 struct snd_soc_dapm_widget_list **list)
1167 struct snd_soc_card *card = dai->component->card;
1168 struct snd_soc_dapm_widget *w;
1173 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1176 * For is_connected_{output,input}_ep fully discover the graph we need
1177 * to reset the cached number of inputs and outputs.
1179 list_for_each_entry(w, &card->widgets, list) {
1180 w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
1181 w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
1184 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1185 paths = is_connected_output_ep(dai->playback_widget, &widgets);
1187 paths = is_connected_input_ep(dai->capture_widget, &widgets);
1189 /* Drop starting point */
1190 list_del(widgets.next);
1192 ret = dapm_widget_list_create(list, &widgets);
1196 trace_snd_soc_dapm_connected(paths, stream);
1197 mutex_unlock(&card->dapm_mutex);
1203 * Handler for regulator supply widget.
1205 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1206 struct snd_kcontrol *kcontrol, int event)
1210 soc_dapm_async_complete(w->dapm);
1212 if (SND_SOC_DAPM_EVENT_ON(event)) {
1213 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1214 ret = regulator_allow_bypass(w->regulator, false);
1216 dev_warn(w->dapm->dev,
1217 "ASoC: Failed to unbypass %s: %d\n",
1221 return regulator_enable(w->regulator);
1223 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1224 ret = regulator_allow_bypass(w->regulator, true);
1226 dev_warn(w->dapm->dev,
1227 "ASoC: Failed to bypass %s: %d\n",
1231 return regulator_disable_deferred(w->regulator, w->shift);
1234 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1237 * Handler for clock supply widget.
1239 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1240 struct snd_kcontrol *kcontrol, int event)
1245 soc_dapm_async_complete(w->dapm);
1247 #ifdef CONFIG_HAVE_CLK
1248 if (SND_SOC_DAPM_EVENT_ON(event)) {
1249 return clk_prepare_enable(w->clk);
1251 clk_disable_unprepare(w->clk);
1257 EXPORT_SYMBOL_GPL(dapm_clock_event);
1259 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1261 if (w->power_checked)
1262 return w->new_power;
1267 w->new_power = w->power_check(w);
1269 w->power_checked = true;
1271 return w->new_power;
1274 /* Generic check to see if a widget should be powered.
1276 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1280 DAPM_UPDATE_STAT(w, power_checks);
1282 in = is_connected_input_ep(w, NULL);
1283 out = is_connected_output_ep(w, NULL);
1284 return out != 0 && in != 0;
1287 /* Check to see if a power supply is needed */
1288 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1290 struct snd_soc_dapm_path *path;
1292 DAPM_UPDATE_STAT(w, power_checks);
1294 /* Check if one of our outputs is connected */
1295 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1296 DAPM_UPDATE_STAT(w, neighbour_checks);
1301 if (path->connected &&
1302 !path->connected(path->source, path->sink))
1305 if (dapm_widget_power_check(path->sink))
1312 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1317 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1318 struct snd_soc_dapm_widget *b,
1326 sort = dapm_down_seq;
1328 if (sort[a->id] != sort[b->id])
1329 return sort[a->id] - sort[b->id];
1330 if (a->subseq != b->subseq) {
1332 return a->subseq - b->subseq;
1334 return b->subseq - a->subseq;
1336 if (a->reg != b->reg)
1337 return a->reg - b->reg;
1338 if (a->dapm != b->dapm)
1339 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1344 /* Insert a widget in order into a DAPM power sequence. */
1345 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1346 struct list_head *list,
1349 struct snd_soc_dapm_widget *w;
1351 list_for_each_entry(w, list, power_list)
1352 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1353 list_add_tail(&new_widget->power_list, &w->power_list);
1357 list_add_tail(&new_widget->power_list, list);
1360 static void dapm_seq_check_event(struct snd_soc_card *card,
1361 struct snd_soc_dapm_widget *w, int event)
1363 const char *ev_name;
1367 case SND_SOC_DAPM_PRE_PMU:
1368 ev_name = "PRE_PMU";
1371 case SND_SOC_DAPM_POST_PMU:
1372 ev_name = "POST_PMU";
1375 case SND_SOC_DAPM_PRE_PMD:
1376 ev_name = "PRE_PMD";
1379 case SND_SOC_DAPM_POST_PMD:
1380 ev_name = "POST_PMD";
1383 case SND_SOC_DAPM_WILL_PMU:
1384 ev_name = "WILL_PMU";
1387 case SND_SOC_DAPM_WILL_PMD:
1388 ev_name = "WILL_PMD";
1392 WARN(1, "Unknown event %d\n", event);
1396 if (w->new_power != power)
1399 if (w->event && (w->event_flags & event)) {
1400 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1402 soc_dapm_async_complete(w->dapm);
1403 trace_snd_soc_dapm_widget_event_start(w, event);
1404 ret = w->event(w, NULL, event);
1405 trace_snd_soc_dapm_widget_event_done(w, event);
1407 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1408 ev_name, w->name, ret);
1412 /* Apply the coalesced changes from a DAPM sequence */
1413 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1414 struct list_head *pending)
1416 struct snd_soc_dapm_context *dapm;
1417 struct snd_soc_dapm_widget *w;
1419 unsigned int value = 0;
1420 unsigned int mask = 0;
1422 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1426 list_for_each_entry(w, pending, power_list) {
1427 WARN_ON(reg != w->reg || dapm != w->dapm);
1428 w->power = w->new_power;
1430 mask |= w->mask << w->shift;
1432 value |= w->on_val << w->shift;
1434 value |= w->off_val << w->shift;
1436 pop_dbg(dapm->dev, card->pop_time,
1437 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1438 w->name, reg, value, mask);
1440 /* Check for events */
1441 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1442 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1446 /* Any widget will do, they should all be updating the
1450 pop_dbg(dapm->dev, card->pop_time,
1451 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1452 value, mask, reg, card->pop_time);
1453 pop_wait(card->pop_time);
1454 soc_dapm_update_bits(dapm, reg, mask, value);
1457 list_for_each_entry(w, pending, power_list) {
1458 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1459 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1463 /* Apply a DAPM power sequence.
1465 * We walk over a pre-sorted list of widgets to apply power to. In
1466 * order to minimise the number of writes to the device required
1467 * multiple widgets will be updated in a single write where possible.
1468 * Currently anything that requires more than a single write is not
1471 static void dapm_seq_run(struct snd_soc_card *card,
1472 struct list_head *list, int event, bool power_up)
1474 struct snd_soc_dapm_widget *w, *n;
1475 struct snd_soc_dapm_context *d;
1478 int cur_subseq = -1;
1479 int cur_reg = SND_SOC_NOPM;
1480 struct snd_soc_dapm_context *cur_dapm = NULL;
1487 sort = dapm_down_seq;
1489 list_for_each_entry_safe(w, n, list, power_list) {
1492 /* Do we need to apply any queued changes? */
1493 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1494 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1495 if (!list_empty(&pending))
1496 dapm_seq_run_coalesced(card, &pending);
1498 if (cur_dapm && cur_dapm->seq_notifier) {
1499 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1500 if (sort[i] == cur_sort)
1501 cur_dapm->seq_notifier(cur_dapm,
1506 if (cur_dapm && w->dapm != cur_dapm)
1507 soc_dapm_async_complete(cur_dapm);
1509 INIT_LIST_HEAD(&pending);
1511 cur_subseq = INT_MIN;
1512 cur_reg = SND_SOC_NOPM;
1517 case snd_soc_dapm_pre:
1519 list_for_each_entry_safe_continue(w, n, list,
1522 if (event == SND_SOC_DAPM_STREAM_START)
1524 NULL, SND_SOC_DAPM_PRE_PMU);
1525 else if (event == SND_SOC_DAPM_STREAM_STOP)
1527 NULL, SND_SOC_DAPM_PRE_PMD);
1530 case snd_soc_dapm_post:
1532 list_for_each_entry_safe_continue(w, n, list,
1535 if (event == SND_SOC_DAPM_STREAM_START)
1537 NULL, SND_SOC_DAPM_POST_PMU);
1538 else if (event == SND_SOC_DAPM_STREAM_STOP)
1540 NULL, SND_SOC_DAPM_POST_PMD);
1544 /* Queue it up for application */
1545 cur_sort = sort[w->id];
1546 cur_subseq = w->subseq;
1549 list_move(&w->power_list, &pending);
1554 dev_err(w->dapm->dev,
1555 "ASoC: Failed to apply widget power: %d\n", ret);
1558 if (!list_empty(&pending))
1559 dapm_seq_run_coalesced(card, &pending);
1561 if (cur_dapm && cur_dapm->seq_notifier) {
1562 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1563 if (sort[i] == cur_sort)
1564 cur_dapm->seq_notifier(cur_dapm,
1568 list_for_each_entry(d, &card->dapm_list, list) {
1569 soc_dapm_async_complete(d);
1573 static void dapm_widget_update(struct snd_soc_card *card)
1575 struct snd_soc_dapm_update *update = card->update;
1576 struct snd_soc_dapm_widget_list *wlist;
1577 struct snd_soc_dapm_widget *w = NULL;
1581 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1584 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1586 for (wi = 0; wi < wlist->num_widgets; wi++) {
1587 w = wlist->widgets[wi];
1589 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1590 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1592 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1600 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1603 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1606 for (wi = 0; wi < wlist->num_widgets; wi++) {
1607 w = wlist->widgets[wi];
1609 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1610 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1612 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1618 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1619 * they're changing state.
1621 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1623 struct snd_soc_dapm_context *d = data;
1626 /* If we're off and we're not supposed to be go into STANDBY */
1627 if (d->bias_level == SND_SOC_BIAS_OFF &&
1628 d->target_bias_level != SND_SOC_BIAS_OFF) {
1630 pm_runtime_get_sync(d->dev);
1632 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1635 "ASoC: Failed to turn on bias: %d\n", ret);
1638 /* Prepare for a transition to ON or away from ON */
1639 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1640 d->bias_level != SND_SOC_BIAS_ON) ||
1641 (d->target_bias_level != SND_SOC_BIAS_ON &&
1642 d->bias_level == SND_SOC_BIAS_ON)) {
1643 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1646 "ASoC: Failed to prepare bias: %d\n", ret);
1650 /* Async callback run prior to DAPM sequences - brings to their final
1653 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1655 struct snd_soc_dapm_context *d = data;
1658 /* If we just powered the last thing off drop to standby bias */
1659 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1660 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1661 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1662 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1664 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1668 /* If we're in standby and can support bias off then do that */
1669 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1670 d->target_bias_level == SND_SOC_BIAS_OFF) {
1671 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1673 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1677 pm_runtime_put(d->dev);
1680 /* If we just powered up then move to active bias */
1681 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1682 d->target_bias_level == SND_SOC_BIAS_ON) {
1683 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1685 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1690 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1691 bool power, bool connect)
1693 /* If a connection is being made or broken then that update
1694 * will have marked the peer dirty, otherwise the widgets are
1695 * not connected and this update has no impact. */
1699 /* If the peer is already in the state we're moving to then we
1700 * won't have an impact on it. */
1701 if (power != peer->power)
1702 dapm_mark_dirty(peer, "peer state change");
1705 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1706 struct list_head *up_list,
1707 struct list_head *down_list)
1709 struct snd_soc_dapm_path *path;
1711 if (w->power == power)
1714 trace_snd_soc_dapm_widget_power(w, power);
1716 /* If we changed our power state perhaps our neigbours changed
1719 snd_soc_dapm_widget_for_each_source_path(w, path)
1720 dapm_widget_set_peer_power(path->source, power, path->connect);
1722 /* Supplies can't affect their outputs, only their inputs */
1723 if (!w->is_supply) {
1724 snd_soc_dapm_widget_for_each_sink_path(w, path)
1725 dapm_widget_set_peer_power(path->sink, power,
1730 dapm_seq_insert(w, up_list, true);
1732 dapm_seq_insert(w, down_list, false);
1735 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1736 struct list_head *up_list,
1737 struct list_head *down_list)
1742 case snd_soc_dapm_pre:
1743 dapm_seq_insert(w, down_list, false);
1745 case snd_soc_dapm_post:
1746 dapm_seq_insert(w, up_list, true);
1750 power = dapm_widget_power_check(w);
1752 dapm_widget_set_power(w, power, up_list, down_list);
1757 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1759 if (dapm->idle_bias_off)
1762 switch (snd_power_get_state(dapm->card->snd_card)) {
1763 case SNDRV_CTL_POWER_D3hot:
1764 case SNDRV_CTL_POWER_D3cold:
1765 return dapm->suspend_bias_off;
1774 * Scan each dapm widget for complete audio path.
1775 * A complete path is a route that has valid endpoints i.e.:-
1777 * o DAC to output pin.
1778 * o Input Pin to ADC.
1779 * o Input pin to Output pin (bypass, sidetone)
1780 * o DAC to ADC (loopback).
1782 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1784 struct snd_soc_dapm_widget *w;
1785 struct snd_soc_dapm_context *d;
1787 LIST_HEAD(down_list);
1788 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1789 enum snd_soc_bias_level bias;
1791 lockdep_assert_held(&card->dapm_mutex);
1793 trace_snd_soc_dapm_start(card);
1795 list_for_each_entry(d, &card->dapm_list, list) {
1796 if (dapm_idle_bias_off(d))
1797 d->target_bias_level = SND_SOC_BIAS_OFF;
1799 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1804 /* Check which widgets we need to power and store them in
1805 * lists indicating if they should be powered up or down. We
1806 * only check widgets that have been flagged as dirty but note
1807 * that new widgets may be added to the dirty list while we
1810 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1811 dapm_power_one_widget(w, &up_list, &down_list);
1814 list_for_each_entry(w, &card->widgets, list) {
1816 case snd_soc_dapm_pre:
1817 case snd_soc_dapm_post:
1818 /* These widgets always need to be powered */
1821 list_del_init(&w->dirty);
1828 /* Supplies and micbiases only bring the
1829 * context up to STANDBY as unless something
1830 * else is active and passing audio they
1831 * generally don't require full power. Signal
1832 * generators are virtual pins and have no
1833 * power impact themselves.
1836 case snd_soc_dapm_siggen:
1837 case snd_soc_dapm_vmid:
1839 case snd_soc_dapm_supply:
1840 case snd_soc_dapm_regulator_supply:
1841 case snd_soc_dapm_clock_supply:
1842 case snd_soc_dapm_micbias:
1843 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1844 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1847 d->target_bias_level = SND_SOC_BIAS_ON;
1854 /* Force all contexts in the card to the same bias state if
1855 * they're not ground referenced.
1857 bias = SND_SOC_BIAS_OFF;
1858 list_for_each_entry(d, &card->dapm_list, list)
1859 if (d->target_bias_level > bias)
1860 bias = d->target_bias_level;
1861 list_for_each_entry(d, &card->dapm_list, list)
1862 if (!dapm_idle_bias_off(d))
1863 d->target_bias_level = bias;
1865 trace_snd_soc_dapm_walk_done(card);
1867 /* Run card bias changes at first */
1868 dapm_pre_sequence_async(&card->dapm, 0);
1869 /* Run other bias changes in parallel */
1870 list_for_each_entry(d, &card->dapm_list, list) {
1871 if (d != &card->dapm)
1872 async_schedule_domain(dapm_pre_sequence_async, d,
1875 async_synchronize_full_domain(&async_domain);
1877 list_for_each_entry(w, &down_list, power_list) {
1878 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1881 list_for_each_entry(w, &up_list, power_list) {
1882 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1885 /* Power down widgets first; try to avoid amplifying pops. */
1886 dapm_seq_run(card, &down_list, event, false);
1888 dapm_widget_update(card);
1891 dapm_seq_run(card, &up_list, event, true);
1893 /* Run all the bias changes in parallel */
1894 list_for_each_entry(d, &card->dapm_list, list) {
1895 if (d != &card->dapm)
1896 async_schedule_domain(dapm_post_sequence_async, d,
1899 async_synchronize_full_domain(&async_domain);
1900 /* Run card bias changes at last */
1901 dapm_post_sequence_async(&card->dapm, 0);
1903 /* do we need to notify any clients that DAPM event is complete */
1904 list_for_each_entry(d, &card->dapm_list, list) {
1905 if (d->stream_event)
1906 d->stream_event(d, event);
1909 pop_dbg(card->dev, card->pop_time,
1910 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1911 pop_wait(card->pop_time);
1913 trace_snd_soc_dapm_done(card);
1918 #ifdef CONFIG_DEBUG_FS
1919 static ssize_t dapm_widget_power_read_file(struct file *file,
1920 char __user *user_buf,
1921 size_t count, loff_t *ppos)
1923 struct snd_soc_dapm_widget *w = file->private_data;
1924 struct snd_soc_card *card = w->dapm->card;
1925 enum snd_soc_dapm_direction dir, rdir;
1929 struct snd_soc_dapm_path *p = NULL;
1931 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1935 mutex_lock(&card->dapm_mutex);
1937 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1942 in = is_connected_input_ep(w, NULL);
1943 out = is_connected_output_ep(w, NULL);
1946 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1947 w->name, w->power ? "On" : "Off",
1948 w->force ? " (forced)" : "", in, out);
1951 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1952 " - R%d(0x%x) mask 0x%x",
1953 w->reg, w->reg, w->mask << w->shift);
1955 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1958 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1960 w->active ? "active" : "inactive");
1962 snd_soc_dapm_for_each_direction(dir) {
1963 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1964 snd_soc_dapm_widget_for_each_path(w, dir, p) {
1965 if (p->connected && !p->connected(w, p->node[rdir]))
1971 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1972 " %s \"%s\" \"%s\"\n",
1973 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
1974 p->name ? p->name : "static",
1975 p->node[rdir]->name);
1979 mutex_unlock(&card->dapm_mutex);
1981 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1987 static const struct file_operations dapm_widget_power_fops = {
1988 .open = simple_open,
1989 .read = dapm_widget_power_read_file,
1990 .llseek = default_llseek,
1993 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1994 size_t count, loff_t *ppos)
1996 struct snd_soc_dapm_context *dapm = file->private_data;
1999 switch (dapm->bias_level) {
2000 case SND_SOC_BIAS_ON:
2003 case SND_SOC_BIAS_PREPARE:
2004 level = "Prepare\n";
2006 case SND_SOC_BIAS_STANDBY:
2007 level = "Standby\n";
2009 case SND_SOC_BIAS_OFF:
2013 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2014 level = "Unknown\n";
2018 return simple_read_from_buffer(user_buf, count, ppos, level,
2022 static const struct file_operations dapm_bias_fops = {
2023 .open = simple_open,
2024 .read = dapm_bias_read_file,
2025 .llseek = default_llseek,
2028 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2029 struct dentry *parent)
2036 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2038 if (!dapm->debugfs_dapm) {
2040 "ASoC: Failed to create DAPM debugfs directory\n");
2044 d = debugfs_create_file("bias_level", 0444,
2045 dapm->debugfs_dapm, dapm,
2049 "ASoC: Failed to create bias level debugfs file\n");
2052 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2054 struct snd_soc_dapm_context *dapm = w->dapm;
2057 if (!dapm->debugfs_dapm || !w->name)
2060 d = debugfs_create_file(w->name, 0444,
2061 dapm->debugfs_dapm, w,
2062 &dapm_widget_power_fops);
2064 dev_warn(w->dapm->dev,
2065 "ASoC: Failed to create %s debugfs file\n",
2069 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2071 debugfs_remove_recursive(dapm->debugfs_dapm);
2075 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2076 struct dentry *parent)
2080 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2084 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2091 * soc_dapm_connect_path() - Connects or disconnects a path
2092 * @path: The path to update
2093 * @connect: The new connect state of the path. True if the path is connected,
2094 * false if it is disconneted.
2095 * @reason: The reason why the path changed (for debugging only)
2097 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2098 bool connect, const char *reason)
2100 if (path->connect == connect)
2103 path->connect = connect;
2104 dapm_mark_dirty(path->source, reason);
2105 dapm_mark_dirty(path->sink, reason);
2106 dapm_path_invalidate(path);
2109 /* test and update the power status of a mux widget */
2110 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2111 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2113 struct snd_soc_dapm_path *path;
2117 lockdep_assert_held(&card->dapm_mutex);
2119 /* find dapm widget path assoc with kcontrol */
2120 dapm_kcontrol_for_each_path(path, kcontrol) {
2122 /* we now need to match the string in the enum to the path */
2123 if (!(strcmp(path->name, e->texts[mux])))
2128 soc_dapm_connect_path(path, connect, "mux update");
2132 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2137 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2138 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2139 struct snd_soc_dapm_update *update)
2141 struct snd_soc_card *card = dapm->card;
2144 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2145 card->update = update;
2146 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2147 card->update = NULL;
2148 mutex_unlock(&card->dapm_mutex);
2150 soc_dpcm_runtime_update(card);
2153 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2155 /* test and update the power status of a mixer or switch widget */
2156 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2157 struct snd_kcontrol *kcontrol, int connect)
2159 struct snd_soc_dapm_path *path;
2162 lockdep_assert_held(&card->dapm_mutex);
2164 /* find dapm widget path assoc with kcontrol */
2165 dapm_kcontrol_for_each_path(path, kcontrol) {
2167 soc_dapm_connect_path(path, connect, "mixer update");
2171 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2176 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2177 struct snd_kcontrol *kcontrol, int connect,
2178 struct snd_soc_dapm_update *update)
2180 struct snd_soc_card *card = dapm->card;
2183 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2184 card->update = update;
2185 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2186 card->update = NULL;
2187 mutex_unlock(&card->dapm_mutex);
2189 soc_dpcm_runtime_update(card);
2192 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2194 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2197 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2198 struct snd_soc_dapm_widget *w;
2200 char *state = "not set";
2202 /* card won't be set for the dummy component, as a spot fix
2203 * we're checking for that case specifically here but in future
2204 * we will ensure that the dummy component looks like others.
2209 list_for_each_entry(w, &cmpnt->card->widgets, list) {
2210 if (w->dapm != dapm)
2213 /* only display widgets that burnm power */
2215 case snd_soc_dapm_hp:
2216 case snd_soc_dapm_mic:
2217 case snd_soc_dapm_spk:
2218 case snd_soc_dapm_line:
2219 case snd_soc_dapm_micbias:
2220 case snd_soc_dapm_dac:
2221 case snd_soc_dapm_adc:
2222 case snd_soc_dapm_pga:
2223 case snd_soc_dapm_out_drv:
2224 case snd_soc_dapm_mixer:
2225 case snd_soc_dapm_mixer_named_ctl:
2226 case snd_soc_dapm_supply:
2227 case snd_soc_dapm_regulator_supply:
2228 case snd_soc_dapm_clock_supply:
2230 count += sprintf(buf + count, "%s: %s\n",
2231 w->name, w->power ? "On":"Off");
2238 switch (snd_soc_dapm_get_bias_level(dapm)) {
2239 case SND_SOC_BIAS_ON:
2242 case SND_SOC_BIAS_PREPARE:
2245 case SND_SOC_BIAS_STANDBY:
2248 case SND_SOC_BIAS_OFF:
2252 count += sprintf(buf + count, "PM State: %s\n", state);
2257 /* show dapm widget status in sys fs */
2258 static ssize_t dapm_widget_show(struct device *dev,
2259 struct device_attribute *attr, char *buf)
2261 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2264 mutex_lock(&rtd->card->dapm_mutex);
2266 for (i = 0; i < rtd->num_codecs; i++) {
2267 struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
2269 count += dapm_widget_show_component(cmpnt, buf + count);
2272 mutex_unlock(&rtd->card->dapm_mutex);
2277 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2279 struct attribute *soc_dapm_dev_attrs[] = {
2280 &dev_attr_dapm_widget.attr,
2284 static void dapm_free_path(struct snd_soc_dapm_path *path)
2286 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2287 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2288 list_del(&path->list_kcontrol);
2289 list_del(&path->list);
2293 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2295 struct snd_soc_dapm_path *p, *next_p;
2296 enum snd_soc_dapm_direction dir;
2300 * remove source and sink paths associated to this widget.
2301 * While removing the path, remove reference to it from both
2302 * source and sink widgets so that path is removed only once.
2304 snd_soc_dapm_for_each_direction(dir) {
2305 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2309 kfree(w->kcontrols);
2310 kfree_const(w->name);
2314 void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
2316 dapm->path_sink_cache.widget = NULL;
2317 dapm->path_source_cache.widget = NULL;
2320 /* free all dapm widgets and resources */
2321 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2323 struct snd_soc_dapm_widget *w, *next_w;
2325 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2326 if (w->dapm != dapm)
2328 snd_soc_dapm_free_widget(w);
2330 snd_soc_dapm_reset_cache(dapm);
2333 static struct snd_soc_dapm_widget *dapm_find_widget(
2334 struct snd_soc_dapm_context *dapm, const char *pin,
2335 bool search_other_contexts)
2337 struct snd_soc_dapm_widget *w;
2338 struct snd_soc_dapm_widget *fallback = NULL;
2340 list_for_each_entry(w, &dapm->card->widgets, list) {
2341 if (!strcmp(w->name, pin)) {
2342 if (w->dapm == dapm)
2349 if (search_other_contexts)
2355 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2356 const char *pin, int status)
2358 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2360 dapm_assert_locked(dapm);
2363 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2367 if (w->connected != status) {
2368 dapm_mark_dirty(w, "pin configuration");
2369 dapm_widget_invalidate_input_paths(w);
2370 dapm_widget_invalidate_output_paths(w);
2373 w->connected = status;
2381 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2382 * @dapm: DAPM context
2384 * Walks all dapm audio paths and powers widgets according to their
2385 * stream or path usage.
2387 * Requires external locking.
2389 * Returns 0 for success.
2391 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2394 * Suppress early reports (eg, jacks syncing their state) to avoid
2395 * silly DAPM runs during card startup.
2397 if (!dapm->card || !dapm->card->instantiated)
2400 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2402 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2405 * snd_soc_dapm_sync - scan and power dapm paths
2406 * @dapm: DAPM context
2408 * Walks all dapm audio paths and powers widgets according to their
2409 * stream or path usage.
2411 * Returns 0 for success.
2413 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2417 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2418 ret = snd_soc_dapm_sync_unlocked(dapm);
2419 mutex_unlock(&dapm->card->dapm_mutex);
2422 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2425 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2426 * @w: The widget for which to update the flags
2428 * Some widgets have a dynamic category which depends on which neighbors they
2429 * are connected to. This function update the category for these widgets.
2431 * This function must be called whenever a path is added or removed to a widget.
2433 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2435 enum snd_soc_dapm_direction dir;
2436 struct snd_soc_dapm_path *p;
2440 case snd_soc_dapm_input:
2441 /* On a fully routed card a input is never a source */
2442 if (w->dapm->card->fully_routed)
2444 ep = SND_SOC_DAPM_EP_SOURCE;
2445 snd_soc_dapm_widget_for_each_source_path(w, p) {
2446 if (p->source->id == snd_soc_dapm_micbias ||
2447 p->source->id == snd_soc_dapm_mic ||
2448 p->source->id == snd_soc_dapm_line ||
2449 p->source->id == snd_soc_dapm_output) {
2455 case snd_soc_dapm_output:
2456 /* On a fully routed card a output is never a sink */
2457 if (w->dapm->card->fully_routed)
2459 ep = SND_SOC_DAPM_EP_SINK;
2460 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2461 if (p->sink->id == snd_soc_dapm_spk ||
2462 p->sink->id == snd_soc_dapm_hp ||
2463 p->sink->id == snd_soc_dapm_line ||
2464 p->sink->id == snd_soc_dapm_input) {
2470 case snd_soc_dapm_line:
2472 snd_soc_dapm_for_each_direction(dir) {
2473 if (!list_empty(&w->edges[dir]))
2474 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2484 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2485 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2486 const char *control)
2488 bool dynamic_source = false;
2489 bool dynamic_sink = false;
2494 switch (source->id) {
2495 case snd_soc_dapm_demux:
2496 dynamic_source = true;
2503 case snd_soc_dapm_mux:
2504 case snd_soc_dapm_switch:
2505 case snd_soc_dapm_mixer:
2506 case snd_soc_dapm_mixer_named_ctl:
2507 dynamic_sink = true;
2513 if (dynamic_source && dynamic_sink) {
2515 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2516 source->name, control, sink->name);
2518 } else if (!dynamic_source && !dynamic_sink) {
2520 "Control not supported for path %s -> [%s] -> %s\n",
2521 source->name, control, sink->name);
2528 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2529 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2530 const char *control,
2531 int (*connected)(struct snd_soc_dapm_widget *source,
2532 struct snd_soc_dapm_widget *sink))
2534 struct snd_soc_dapm_widget *widgets[2];
2535 enum snd_soc_dapm_direction dir;
2536 struct snd_soc_dapm_path *path;
2539 if (wsink->is_supply && !wsource->is_supply) {
2541 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2542 wsource->name, wsink->name);
2546 if (connected && !wsource->is_supply) {
2548 "connected() callback only supported for supply widgets (%s -> %s)\n",
2549 wsource->name, wsink->name);
2553 if (wsource->is_supply && control) {
2555 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2556 wsource->name, control, wsink->name);
2560 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2564 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2568 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2569 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2570 widgets[SND_SOC_DAPM_DIR_IN] = wsource;
2571 widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
2573 path->connected = connected;
2574 INIT_LIST_HEAD(&path->list);
2575 INIT_LIST_HEAD(&path->list_kcontrol);
2577 if (wsource->is_supply || wsink->is_supply)
2578 path->is_supply = 1;
2580 /* connect static paths */
2581 if (control == NULL) {
2584 switch (wsource->id) {
2585 case snd_soc_dapm_demux:
2586 ret = dapm_connect_mux(dapm, path, control, wsource);
2594 switch (wsink->id) {
2595 case snd_soc_dapm_mux:
2596 ret = dapm_connect_mux(dapm, path, control, wsink);
2600 case snd_soc_dapm_switch:
2601 case snd_soc_dapm_mixer:
2602 case snd_soc_dapm_mixer_named_ctl:
2603 ret = dapm_connect_mixer(dapm, path, control);
2612 list_add(&path->list, &dapm->card->paths);
2613 snd_soc_dapm_for_each_direction(dir)
2614 list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
2616 snd_soc_dapm_for_each_direction(dir) {
2617 dapm_update_widget_flags(widgets[dir]);
2618 dapm_mark_dirty(widgets[dir], "Route added");
2621 if (dapm->card->instantiated && path->connect)
2622 dapm_path_invalidate(path);
2630 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2631 const struct snd_soc_dapm_route *route)
2633 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2634 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2637 char prefixed_sink[80];
2638 char prefixed_source[80];
2642 prefix = soc_dapm_prefix(dapm);
2644 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2645 prefix, route->sink);
2646 sink = prefixed_sink;
2647 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2648 prefix, route->source);
2649 source = prefixed_source;
2652 source = route->source;
2655 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2656 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2658 if (wsink && wsource)
2662 * find src and dest widgets over all widgets but favor a widget from
2663 * current DAPM context
2665 list_for_each_entry(w, &dapm->card->widgets, list) {
2666 if (!wsink && !(strcmp(w->name, sink))) {
2668 if (w->dapm == dapm) {
2675 if (!wsource && !(strcmp(w->name, source))) {
2677 if (w->dapm == dapm) {
2684 /* use widget from another DAPM context if not found from this */
2690 if (wsource == NULL) {
2691 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2695 if (wsink == NULL) {
2696 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2702 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2703 dapm_wcache_update(&dapm->path_source_cache, wsource);
2705 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2712 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2713 source, route->control, sink);
2717 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2718 const struct snd_soc_dapm_route *route)
2720 struct snd_soc_dapm_widget *wsource, *wsink;
2721 struct snd_soc_dapm_path *path, *p;
2724 char prefixed_sink[80];
2725 char prefixed_source[80];
2728 if (route->control) {
2730 "ASoC: Removal of routes with controls not supported\n");
2734 prefix = soc_dapm_prefix(dapm);
2736 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2737 prefix, route->sink);
2738 sink = prefixed_sink;
2739 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2740 prefix, route->source);
2741 source = prefixed_source;
2744 source = route->source;
2748 list_for_each_entry(p, &dapm->card->paths, list) {
2749 if (strcmp(p->source->name, source) != 0)
2751 if (strcmp(p->sink->name, sink) != 0)
2758 wsource = path->source;
2761 dapm_mark_dirty(wsource, "Route removed");
2762 dapm_mark_dirty(wsink, "Route removed");
2764 dapm_path_invalidate(path);
2766 dapm_free_path(path);
2768 /* Update any path related flags */
2769 dapm_update_widget_flags(wsource);
2770 dapm_update_widget_flags(wsink);
2772 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2780 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2781 * @dapm: DAPM context
2782 * @route: audio routes
2783 * @num: number of routes
2785 * Connects 2 dapm widgets together via a named audio path. The sink is
2786 * the widget receiving the audio signal, whilst the source is the sender
2787 * of the audio signal.
2789 * Returns 0 for success else error. On error all resources can be freed
2790 * with a call to snd_soc_card_free().
2792 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2793 const struct snd_soc_dapm_route *route, int num)
2797 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2798 for (i = 0; i < num; i++) {
2799 r = snd_soc_dapm_add_route(dapm, route);
2801 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2803 route->control ? route->control : "direct",
2809 mutex_unlock(&dapm->card->dapm_mutex);
2813 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2816 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2817 * @dapm: DAPM context
2818 * @route: audio routes
2819 * @num: number of routes
2821 * Removes routes from the DAPM context.
2823 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2824 const struct snd_soc_dapm_route *route, int num)
2828 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2829 for (i = 0; i < num; i++) {
2830 snd_soc_dapm_del_route(dapm, route);
2833 mutex_unlock(&dapm->card->dapm_mutex);
2837 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2839 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2840 const struct snd_soc_dapm_route *route)
2842 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2845 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2848 struct snd_soc_dapm_path *path;
2852 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2858 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2863 if (route->control || route->connected)
2864 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2865 route->source, route->sink);
2867 snd_soc_dapm_widget_for_each_sink_path(source, path) {
2868 if (path->sink == sink) {
2875 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2876 route->source, route->sink);
2878 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2879 count, route->source, route->sink);
2885 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2886 * @dapm: DAPM context
2887 * @route: audio routes
2888 * @num: number of routes
2890 * Mark existing routes matching those specified in the passed array
2891 * as being weak, meaning that they are ignored for the purpose of
2892 * power decisions. The main intended use case is for sidetone paths
2893 * which couple audio between other independent paths if they are both
2894 * active in order to make the combination work better at the user
2895 * level but which aren't intended to be "used".
2897 * Note that CODEC drivers should not use this as sidetone type paths
2898 * can frequently also be used as bypass paths.
2900 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2901 const struct snd_soc_dapm_route *route, int num)
2906 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2907 for (i = 0; i < num; i++) {
2908 err = snd_soc_dapm_weak_route(dapm, route);
2913 mutex_unlock(&dapm->card->dapm_mutex);
2917 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2920 * snd_soc_dapm_new_widgets - add new dapm widgets
2921 * @card: card to be checked for new dapm widgets
2923 * Checks the codec for any new dapm widgets and creates them if found.
2925 * Returns 0 for success.
2927 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2929 struct snd_soc_dapm_widget *w;
2932 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2934 list_for_each_entry(w, &card->widgets, list)
2939 if (w->num_kcontrols) {
2940 w->kcontrols = kzalloc(w->num_kcontrols *
2941 sizeof(struct snd_kcontrol *),
2943 if (!w->kcontrols) {
2944 mutex_unlock(&card->dapm_mutex);
2950 case snd_soc_dapm_switch:
2951 case snd_soc_dapm_mixer:
2952 case snd_soc_dapm_mixer_named_ctl:
2955 case snd_soc_dapm_mux:
2956 case snd_soc_dapm_demux:
2959 case snd_soc_dapm_pga:
2960 case snd_soc_dapm_out_drv:
2963 case snd_soc_dapm_dai_link:
2964 dapm_new_dai_link(w);
2970 /* Read the initial power state from the device */
2972 soc_dapm_read(w->dapm, w->reg, &val);
2973 val = val >> w->shift;
2975 if (val == w->on_val)
2981 dapm_mark_dirty(w, "new widget");
2982 dapm_debugfs_add_widget(w);
2985 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2986 mutex_unlock(&card->dapm_mutex);
2989 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2992 * snd_soc_dapm_get_volsw - dapm mixer get callback
2993 * @kcontrol: mixer control
2994 * @ucontrol: control element information
2996 * Callback to get the value of a dapm mixer control.
2998 * Returns 0 for success.
3000 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3001 struct snd_ctl_elem_value *ucontrol)
3003 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3004 struct snd_soc_card *card = dapm->card;
3005 struct soc_mixer_control *mc =
3006 (struct soc_mixer_control *)kcontrol->private_value;
3008 unsigned int shift = mc->shift;
3010 unsigned int mask = (1 << fls(max)) - 1;
3011 unsigned int invert = mc->invert;
3015 if (snd_soc_volsw_is_stereo(mc))
3017 "ASoC: Control '%s' is stereo, which is not supported\n",
3020 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3021 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3022 ret = soc_dapm_read(dapm, reg, &val);
3023 val = (val >> shift) & mask;
3025 val = dapm_kcontrol_get_value(kcontrol);
3027 mutex_unlock(&card->dapm_mutex);
3033 ucontrol->value.integer.value[0] = max - val;
3035 ucontrol->value.integer.value[0] = val;
3039 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3042 * snd_soc_dapm_put_volsw - dapm mixer set callback
3043 * @kcontrol: mixer control
3044 * @ucontrol: control element information
3046 * Callback to set the value of a dapm mixer control.
3048 * Returns 0 for success.
3050 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3051 struct snd_ctl_elem_value *ucontrol)
3053 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3054 struct snd_soc_card *card = dapm->card;
3055 struct soc_mixer_control *mc =
3056 (struct soc_mixer_control *)kcontrol->private_value;
3058 unsigned int shift = mc->shift;
3060 unsigned int mask = (1 << fls(max)) - 1;
3061 unsigned int invert = mc->invert;
3063 int connect, change, reg_change = 0;
3064 struct snd_soc_dapm_update update;
3067 if (snd_soc_volsw_is_stereo(mc))
3069 "ASoC: Control '%s' is stereo, which is not supported\n",
3072 val = (ucontrol->value.integer.value[0] & mask);
3078 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3080 change = dapm_kcontrol_set_value(kcontrol, val);
3082 if (reg != SND_SOC_NOPM) {
3083 mask = mask << shift;
3086 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3089 if (change || reg_change) {
3091 update.kcontrol = kcontrol;
3095 card->update = &update;
3097 change |= reg_change;
3099 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3101 card->update = NULL;
3104 mutex_unlock(&card->dapm_mutex);
3107 soc_dpcm_runtime_update(card);
3111 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3114 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3115 * @kcontrol: mixer control
3116 * @ucontrol: control element information
3118 * Callback to get the value of a dapm enumerated double mixer control.
3120 * Returns 0 for success.
3122 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3123 struct snd_ctl_elem_value *ucontrol)
3125 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3126 struct snd_soc_card *card = dapm->card;
3127 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3128 unsigned int reg_val, val;
3130 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3131 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3132 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3134 mutex_unlock(&card->dapm_mutex);
3138 reg_val = dapm_kcontrol_get_value(kcontrol);
3140 mutex_unlock(&card->dapm_mutex);
3142 val = (reg_val >> e->shift_l) & e->mask;
3143 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3144 if (e->shift_l != e->shift_r) {
3145 val = (reg_val >> e->shift_r) & e->mask;
3146 val = snd_soc_enum_val_to_item(e, val);
3147 ucontrol->value.enumerated.item[1] = val;
3152 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3155 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3156 * @kcontrol: mixer control
3157 * @ucontrol: control element information
3159 * Callback to set the value of a dapm enumerated double mixer control.
3161 * Returns 0 for success.
3163 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3164 struct snd_ctl_elem_value *ucontrol)
3166 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3167 struct snd_soc_card *card = dapm->card;
3168 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3169 unsigned int *item = ucontrol->value.enumerated.item;
3170 unsigned int val, change, reg_change = 0;
3172 struct snd_soc_dapm_update update;
3175 if (item[0] >= e->items)
3178 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3179 mask = e->mask << e->shift_l;
3180 if (e->shift_l != e->shift_r) {
3181 if (item[1] > e->items)
3183 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3184 mask |= e->mask << e->shift_r;
3187 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3189 change = dapm_kcontrol_set_value(kcontrol, val);
3191 if (e->reg != SND_SOC_NOPM)
3192 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3194 if (change || reg_change) {
3196 update.kcontrol = kcontrol;
3197 update.reg = e->reg;
3200 card->update = &update;
3202 change |= reg_change;
3204 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3206 card->update = NULL;
3209 mutex_unlock(&card->dapm_mutex);
3212 soc_dpcm_runtime_update(card);
3216 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3219 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3221 * @kcontrol: mixer control
3222 * @uinfo: control element information
3224 * Callback to provide information about a pin switch control.
3226 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3227 struct snd_ctl_elem_info *uinfo)
3229 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3231 uinfo->value.integer.min = 0;
3232 uinfo->value.integer.max = 1;
3236 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3239 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3241 * @kcontrol: mixer control
3244 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3245 struct snd_ctl_elem_value *ucontrol)
3247 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3248 const char *pin = (const char *)kcontrol->private_value;
3250 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3252 ucontrol->value.integer.value[0] =
3253 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3255 mutex_unlock(&card->dapm_mutex);
3259 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3262 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3264 * @kcontrol: mixer control
3267 int snd_soc_dapm_put_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 if (ucontrol->value.integer.value[0])
3274 snd_soc_dapm_enable_pin(&card->dapm, pin);
3276 snd_soc_dapm_disable_pin(&card->dapm, pin);
3278 snd_soc_dapm_sync(&card->dapm);
3281 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3283 struct snd_soc_dapm_widget *
3284 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3285 const struct snd_soc_dapm_widget *widget)
3287 struct snd_soc_dapm_widget *w;
3289 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3290 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3291 /* Do not nag about probe deferrals */
3293 int ret = PTR_ERR(w);
3295 if (ret != -EPROBE_DEFER)
3297 "ASoC: Failed to create DAPM control %s (%d)\n",
3303 "ASoC: Failed to create DAPM control %s\n",
3307 mutex_unlock(&dapm->card->dapm_mutex);
3311 struct snd_soc_dapm_widget *
3312 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3313 const struct snd_soc_dapm_widget *widget)
3315 enum snd_soc_dapm_direction dir;
3316 struct snd_soc_dapm_widget *w;
3320 if ((w = dapm_cnew_widget(widget)) == NULL)
3324 case snd_soc_dapm_regulator_supply:
3325 w->regulator = devm_regulator_get(dapm->dev, w->name);
3326 if (IS_ERR(w->regulator)) {
3327 ret = PTR_ERR(w->regulator);
3328 if (ret == -EPROBE_DEFER)
3329 return ERR_PTR(ret);
3330 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3335 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3336 ret = regulator_allow_bypass(w->regulator, true);
3338 dev_warn(w->dapm->dev,
3339 "ASoC: Failed to bypass %s: %d\n",
3343 case snd_soc_dapm_clock_supply:
3344 #ifdef CONFIG_CLKDEV_LOOKUP
3345 w->clk = devm_clk_get(dapm->dev, w->name);
3346 if (IS_ERR(w->clk)) {
3347 ret = PTR_ERR(w->clk);
3348 if (ret == -EPROBE_DEFER)
3349 return ERR_PTR(ret);
3350 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3362 prefix = soc_dapm_prefix(dapm);
3364 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3366 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3367 if (w->name == NULL) {
3373 case snd_soc_dapm_mic:
3374 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3375 w->power_check = dapm_generic_check_power;
3377 case snd_soc_dapm_input:
3378 if (!dapm->card->fully_routed)
3379 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3380 w->power_check = dapm_generic_check_power;
3382 case snd_soc_dapm_spk:
3383 case snd_soc_dapm_hp:
3384 w->is_ep = SND_SOC_DAPM_EP_SINK;
3385 w->power_check = dapm_generic_check_power;
3387 case snd_soc_dapm_output:
3388 if (!dapm->card->fully_routed)
3389 w->is_ep = SND_SOC_DAPM_EP_SINK;
3390 w->power_check = dapm_generic_check_power;
3392 case snd_soc_dapm_vmid:
3393 case snd_soc_dapm_siggen:
3394 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3395 w->power_check = dapm_always_on_check_power;
3397 case snd_soc_dapm_mux:
3398 case snd_soc_dapm_demux:
3399 case snd_soc_dapm_switch:
3400 case snd_soc_dapm_mixer:
3401 case snd_soc_dapm_mixer_named_ctl:
3402 case snd_soc_dapm_adc:
3403 case snd_soc_dapm_aif_out:
3404 case snd_soc_dapm_dac:
3405 case snd_soc_dapm_aif_in:
3406 case snd_soc_dapm_pga:
3407 case snd_soc_dapm_out_drv:
3408 case snd_soc_dapm_micbias:
3409 case snd_soc_dapm_line:
3410 case snd_soc_dapm_dai_link:
3411 case snd_soc_dapm_dai_out:
3412 case snd_soc_dapm_dai_in:
3413 w->power_check = dapm_generic_check_power;
3415 case snd_soc_dapm_supply:
3416 case snd_soc_dapm_regulator_supply:
3417 case snd_soc_dapm_clock_supply:
3418 case snd_soc_dapm_kcontrol:
3420 w->power_check = dapm_supply_check_power;
3423 w->power_check = dapm_always_on_check_power;
3428 INIT_LIST_HEAD(&w->list);
3429 INIT_LIST_HEAD(&w->dirty);
3430 list_add_tail(&w->list, &dapm->card->widgets);
3432 snd_soc_dapm_for_each_direction(dir) {
3433 INIT_LIST_HEAD(&w->edges[dir]);
3434 w->endpoints[dir] = -1;
3437 /* machine layer set ups unconnected pins and insertions */
3443 * snd_soc_dapm_new_controls - create new dapm controls
3444 * @dapm: DAPM context
3445 * @widget: widget array
3446 * @num: number of widgets
3448 * Creates new DAPM controls based upon the templates.
3450 * Returns 0 for success else error.
3452 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3453 const struct snd_soc_dapm_widget *widget,
3456 struct snd_soc_dapm_widget *w;
3460 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3461 for (i = 0; i < num; i++) {
3462 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3465 /* Do not nag about probe deferrals */
3466 if (ret == -EPROBE_DEFER)
3469 "ASoC: Failed to create DAPM control %s (%d)\n",
3475 "ASoC: Failed to create DAPM control %s\n",
3482 mutex_unlock(&dapm->card->dapm_mutex);
3485 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3487 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3488 struct snd_kcontrol *kcontrol, int event)
3490 struct snd_soc_dapm_path *source_p, *sink_p;
3491 struct snd_soc_dai *source, *sink;
3492 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3493 struct snd_pcm_substream substream;
3494 struct snd_pcm_hw_params *params = NULL;
3498 if (WARN_ON(!config) ||
3499 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3500 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3503 /* We only support a single source and sink, pick the first */
3504 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
3505 struct snd_soc_dapm_path,
3506 list_node[SND_SOC_DAPM_DIR_OUT]);
3507 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
3508 struct snd_soc_dapm_path,
3509 list_node[SND_SOC_DAPM_DIR_IN]);
3511 source = source_p->source->priv;
3512 sink = sink_p->sink->priv;
3514 /* Be a little careful as we don't want to overflow the mask array */
3515 if (config->formats) {
3516 fmt = ffs(config->formats) - 1;
3518 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3523 /* Currently very limited parameter selection */
3524 params = kzalloc(sizeof(*params), GFP_KERNEL);
3529 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3531 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3533 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3536 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3537 = config->channels_min;
3538 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3539 = config->channels_max;
3541 memset(&substream, 0, sizeof(substream));
3544 case SND_SOC_DAPM_PRE_PMU:
3545 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3546 if (source->driver->ops && source->driver->ops->startup) {
3547 ret = source->driver->ops->startup(&substream, source);
3549 dev_err(source->dev,
3550 "ASoC: startup() failed: %d\n", ret);
3555 ret = soc_dai_hw_params(&substream, params, source);
3559 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3560 if (sink->driver->ops && sink->driver->ops->startup) {
3561 ret = sink->driver->ops->startup(&substream, sink);
3564 "ASoC: startup() failed: %d\n", ret);
3569 ret = soc_dai_hw_params(&substream, params, sink);
3574 case SND_SOC_DAPM_POST_PMU:
3575 ret = snd_soc_dai_digital_mute(sink, 0,
3576 SNDRV_PCM_STREAM_PLAYBACK);
3577 if (ret != 0 && ret != -ENOTSUPP)
3578 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3582 case SND_SOC_DAPM_PRE_PMD:
3583 ret = snd_soc_dai_digital_mute(sink, 1,
3584 SNDRV_PCM_STREAM_PLAYBACK);
3585 if (ret != 0 && ret != -ENOTSUPP)
3586 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3590 if (source->driver->ops && source->driver->ops->shutdown) {
3591 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3592 source->driver->ops->shutdown(&substream, source);
3596 if (sink->driver->ops && sink->driver->ops->shutdown) {
3597 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3598 sink->driver->ops->shutdown(&substream, sink);
3603 WARN(1, "Unknown event %d\n", event);
3612 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3613 struct snd_ctl_elem_value *ucontrol)
3615 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3617 ucontrol->value.enumerated.item[0] = w->params_select;
3622 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3623 struct snd_ctl_elem_value *ucontrol)
3625 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3627 /* Can't change the config when widget is already powered */
3631 if (ucontrol->value.enumerated.item[0] == w->params_select)
3634 if (ucontrol->value.enumerated.item[0] >= w->num_params)
3637 w->params_select = ucontrol->value.enumerated.item[0];
3642 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3643 const struct snd_soc_pcm_stream *params,
3644 unsigned int num_params,
3645 struct snd_soc_dapm_widget *source,
3646 struct snd_soc_dapm_widget *sink)
3648 struct snd_soc_dapm_widget template;
3649 struct snd_soc_dapm_widget *w;
3652 unsigned long private_value;
3653 const char **w_param_text;
3654 struct soc_enum w_param_enum[] = {
3655 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3657 struct snd_kcontrol_new kcontrol_dai_link[] = {
3658 SOC_ENUM_EXT(NULL, w_param_enum[0],
3659 snd_soc_dapm_dai_link_get,
3660 snd_soc_dapm_dai_link_put),
3662 const struct snd_soc_pcm_stream *config = params;
3664 w_param_text = devm_kcalloc(card->dev, num_params,
3665 sizeof(char *), GFP_KERNEL);
3669 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3670 source->name, sink->name);
3673 goto outfree_w_param;
3676 for (count = 0 ; count < num_params; count++) {
3677 if (!config->stream_name) {
3678 dev_warn(card->dapm.dev,
3679 "ASoC: anonymous config %d for dai link %s\n",
3681 w_param_text[count] =
3682 devm_kasprintf(card->dev, GFP_KERNEL,
3683 "Anonymous Configuration %d",
3685 if (!w_param_text[count]) {
3687 goto outfree_link_name;
3690 w_param_text[count] = devm_kmemdup(card->dev,
3691 config->stream_name,
3692 strlen(config->stream_name) + 1,
3694 if (!w_param_text[count]) {
3696 goto outfree_link_name;
3701 w_param_enum[0].items = num_params;
3702 w_param_enum[0].texts = w_param_text;
3704 memset(&template, 0, sizeof(template));
3705 template.reg = SND_SOC_NOPM;
3706 template.id = snd_soc_dapm_dai_link;
3707 template.name = link_name;
3708 template.event = snd_soc_dai_link_event;
3709 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3710 SND_SOC_DAPM_PRE_PMD;
3711 template.num_kcontrols = 1;
3712 /* duplicate w_param_enum on heap so that memory persists */
3714 (unsigned long) devm_kmemdup(card->dev,
3715 (void *)(kcontrol_dai_link[0].private_value),
3716 sizeof(struct soc_enum), GFP_KERNEL);
3717 if (!private_value) {
3718 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3721 goto outfree_link_name;
3723 kcontrol_dai_link[0].private_value = private_value;
3724 /* duplicate kcontrol_dai_link on heap so that memory persists */
3725 template.kcontrol_news =
3726 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3727 sizeof(struct snd_kcontrol_new),
3729 if (!template.kcontrol_news) {
3730 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3733 goto outfree_private_value;
3736 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3738 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3741 /* Do not nag about probe deferrals */
3742 if (ret != -EPROBE_DEFER)
3744 "ASoC: Failed to create %s widget (%d)\n",
3746 goto outfree_kcontrol_news;
3749 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3752 goto outfree_kcontrol_news;
3756 w->num_params = num_params;
3758 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3761 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3764 devm_kfree(card->dev, w);
3765 outfree_kcontrol_news:
3766 devm_kfree(card->dev, (void *)template.kcontrol_news);
3767 outfree_private_value:
3768 devm_kfree(card->dev, (void *)private_value);
3770 devm_kfree(card->dev, link_name);
3772 for (count = 0 ; count < num_params; count++)
3773 devm_kfree(card->dev, (void *)w_param_text[count]);
3774 devm_kfree(card->dev, w_param_text);
3779 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3780 struct snd_soc_dai *dai)
3782 struct snd_soc_dapm_widget template;
3783 struct snd_soc_dapm_widget *w;
3785 WARN_ON(dapm->dev != dai->dev);
3787 memset(&template, 0, sizeof(template));
3788 template.reg = SND_SOC_NOPM;
3790 if (dai->driver->playback.stream_name) {
3791 template.id = snd_soc_dapm_dai_in;
3792 template.name = dai->driver->playback.stream_name;
3793 template.sname = dai->driver->playback.stream_name;
3795 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3798 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3800 int ret = PTR_ERR(w);
3802 /* Do not nag about probe deferrals */
3803 if (ret != -EPROBE_DEFER)
3805 "ASoC: Failed to create %s widget (%d)\n",
3806 dai->driver->playback.stream_name, ret);
3810 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3811 dai->driver->playback.stream_name);
3816 dai->playback_widget = w;
3819 if (dai->driver->capture.stream_name) {
3820 template.id = snd_soc_dapm_dai_out;
3821 template.name = dai->driver->capture.stream_name;
3822 template.sname = dai->driver->capture.stream_name;
3824 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3827 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3829 int ret = PTR_ERR(w);
3831 /* Do not nag about probe deferrals */
3832 if (ret != -EPROBE_DEFER)
3834 "ASoC: Failed to create %s widget (%d)\n",
3835 dai->driver->playback.stream_name, ret);
3839 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3840 dai->driver->capture.stream_name);
3845 dai->capture_widget = w;
3851 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3853 struct snd_soc_dapm_widget *dai_w, *w;
3854 struct snd_soc_dapm_widget *src, *sink;
3855 struct snd_soc_dai *dai;
3857 /* For each DAI widget... */
3858 list_for_each_entry(dai_w, &card->widgets, list) {
3859 switch (dai_w->id) {
3860 case snd_soc_dapm_dai_in:
3861 case snd_soc_dapm_dai_out:
3867 /* let users know there is no DAI to link */
3869 dev_dbg(card->dev, "dai widget %s has no DAI\n",
3876 /* ...find all widgets with the same stream and link them */
3877 list_for_each_entry(w, &card->widgets, list) {
3878 if (w->dapm != dai_w->dapm)
3882 case snd_soc_dapm_dai_in:
3883 case snd_soc_dapm_dai_out:
3889 if (!w->sname || !strstr(w->sname, dai_w->sname))
3892 if (dai_w->id == snd_soc_dapm_dai_in) {
3899 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3900 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3907 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3908 struct snd_soc_pcm_runtime *rtd)
3910 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3911 struct snd_soc_dapm_widget *sink, *source;
3914 for (i = 0; i < rtd->num_codecs; i++) {
3915 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3917 /* connect BE DAI playback if widgets are valid */
3918 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3919 source = cpu_dai->playback_widget;
3920 sink = codec_dai->playback_widget;
3921 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3922 cpu_dai->component->name, source->name,
3923 codec_dai->component->name, sink->name);
3925 snd_soc_dapm_add_path(&card->dapm, source, sink,
3929 /* connect BE DAI capture if widgets are valid */
3930 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3931 source = codec_dai->capture_widget;
3932 sink = cpu_dai->capture_widget;
3933 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3934 codec_dai->component->name, source->name,
3935 cpu_dai->component->name, sink->name);
3937 snd_soc_dapm_add_path(&card->dapm, source, sink,
3943 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3946 struct snd_soc_dapm_widget *w;
3949 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3950 w = dai->playback_widget;
3952 w = dai->capture_widget;
3955 dapm_mark_dirty(w, "stream event");
3957 if (w->id == snd_soc_dapm_dai_in) {
3958 ep = SND_SOC_DAPM_EP_SOURCE;
3959 dapm_widget_invalidate_input_paths(w);
3961 ep = SND_SOC_DAPM_EP_SINK;
3962 dapm_widget_invalidate_output_paths(w);
3966 case SND_SOC_DAPM_STREAM_START:
3970 case SND_SOC_DAPM_STREAM_STOP:
3974 case SND_SOC_DAPM_STREAM_SUSPEND:
3975 case SND_SOC_DAPM_STREAM_RESUME:
3976 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3977 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3983 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3985 struct snd_soc_pcm_runtime *rtd = card->rtd;
3988 /* for each BE DAI link... */
3989 for (i = 0; i < card->num_rtd; i++) {
3990 rtd = &card->rtd[i];
3993 * dynamic FE links have no fixed DAI mapping.
3994 * CODEC<->CODEC links have no direct connection.
3996 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3999 dapm_connect_dai_link_widgets(card, rtd);
4003 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4008 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
4009 for (i = 0; i < rtd->num_codecs; i++)
4010 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
4012 dapm_power_widgets(rtd->card, event);
4016 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4017 * @rtd: PCM runtime data
4018 * @stream: stream name
4019 * @event: stream event
4021 * Sends a stream event to the dapm core. The core then makes any
4022 * necessary widget power changes.
4024 * Returns 0 for success else error.
4026 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4029 struct snd_soc_card *card = rtd->card;
4031 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4032 soc_dapm_stream_event(rtd, stream, event);
4033 mutex_unlock(&card->dapm_mutex);
4037 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4038 * @dapm: DAPM context
4041 * Enables input/output pin and its parents or children widgets iff there is
4042 * a valid audio route and active audio stream.
4044 * Requires external locking.
4046 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4047 * do any widget power switching.
4049 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4052 return snd_soc_dapm_set_pin(dapm, pin, 1);
4054 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4057 * snd_soc_dapm_enable_pin - enable pin.
4058 * @dapm: DAPM context
4061 * Enables input/output pin and its parents or children widgets iff there is
4062 * a valid audio route and active audio stream.
4064 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4065 * do any widget power switching.
4067 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4071 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4073 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4075 mutex_unlock(&dapm->card->dapm_mutex);
4079 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4082 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4083 * @dapm: DAPM context
4086 * Enables input/output pin regardless of any other state. This is
4087 * intended for use with microphone bias supplies used in microphone
4090 * Requires external locking.
4092 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4093 * do any widget power switching.
4095 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4098 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4101 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4105 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4106 if (!w->connected) {
4108 * w->force does not affect the number of input or output paths,
4109 * so we only have to recheck if w->connected is changed
4111 dapm_widget_invalidate_input_paths(w);
4112 dapm_widget_invalidate_output_paths(w);
4116 dapm_mark_dirty(w, "force enable");
4120 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4123 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4124 * @dapm: DAPM context
4127 * Enables input/output pin regardless of any other state. This is
4128 * intended for use with microphone bias supplies used in microphone
4131 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4132 * do any widget power switching.
4134 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4139 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4141 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4143 mutex_unlock(&dapm->card->dapm_mutex);
4147 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4150 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4151 * @dapm: DAPM context
4154 * Disables input/output pin and its parents or children widgets.
4156 * Requires external locking.
4158 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4159 * do any widget power switching.
4161 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4164 return snd_soc_dapm_set_pin(dapm, pin, 0);
4166 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4169 * snd_soc_dapm_disable_pin - disable pin.
4170 * @dapm: DAPM context
4173 * Disables input/output pin and its parents or children widgets.
4175 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4176 * do any widget power switching.
4178 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4183 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4185 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4187 mutex_unlock(&dapm->card->dapm_mutex);
4191 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4194 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4195 * @dapm: DAPM context
4198 * Marks the specified pin as being not connected, disabling it along
4199 * any parent or child widgets. At present this is identical to
4200 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4201 * additional things such as disabling controls which only affect
4202 * paths through the pin.
4204 * Requires external locking.
4206 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4207 * do any widget power switching.
4209 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4212 return snd_soc_dapm_set_pin(dapm, pin, 0);
4214 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4217 * snd_soc_dapm_nc_pin - permanently disable pin.
4218 * @dapm: DAPM context
4221 * Marks the specified pin as being not connected, disabling it along
4222 * any parent or child widgets. At present this is identical to
4223 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4224 * additional things such as disabling controls which only affect
4225 * paths through the pin.
4227 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4228 * do any widget power switching.
4230 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4234 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4236 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4238 mutex_unlock(&dapm->card->dapm_mutex);
4242 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4245 * snd_soc_dapm_get_pin_status - get audio pin status
4246 * @dapm: DAPM context
4247 * @pin: audio signal pin endpoint (or start point)
4249 * Get audio pin status - connected or disconnected.
4251 * Returns 1 for connected otherwise 0.
4253 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4256 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4259 return w->connected;
4263 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4266 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4267 * @dapm: DAPM context
4268 * @pin: audio signal pin endpoint (or start point)
4270 * Mark the given endpoint or pin as ignoring suspend. When the
4271 * system is disabled a path between two endpoints flagged as ignoring
4272 * suspend will not be disabled. The path must already be enabled via
4273 * normal means at suspend time, it will not be turned on if it was not
4276 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4279 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4282 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4286 w->ignore_suspend = 1;
4290 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4293 * snd_soc_dapm_free - free dapm resources
4294 * @dapm: DAPM context
4296 * Free all dapm widgets and resources.
4298 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4300 dapm_debugfs_cleanup(dapm);
4301 dapm_free_widgets(dapm);
4302 list_del(&dapm->list);
4304 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4306 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4308 struct snd_soc_card *card = dapm->card;
4309 struct snd_soc_dapm_widget *w;
4310 LIST_HEAD(down_list);
4313 mutex_lock(&card->dapm_mutex);
4315 list_for_each_entry(w, &dapm->card->widgets, list) {
4316 if (w->dapm != dapm)
4319 dapm_seq_insert(w, &down_list, false);
4325 /* If there were no widgets to power down we're already in
4329 if (dapm->bias_level == SND_SOC_BIAS_ON)
4330 snd_soc_dapm_set_bias_level(dapm,
4331 SND_SOC_BIAS_PREPARE);
4332 dapm_seq_run(card, &down_list, 0, false);
4333 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4334 snd_soc_dapm_set_bias_level(dapm,
4335 SND_SOC_BIAS_STANDBY);
4338 mutex_unlock(&card->dapm_mutex);
4342 * snd_soc_dapm_shutdown - callback for system shutdown
4344 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4346 struct snd_soc_dapm_context *dapm;
4348 list_for_each_entry(dapm, &card->dapm_list, list) {
4349 if (dapm != &card->dapm) {
4350 soc_dapm_shutdown_dapm(dapm);
4351 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4352 snd_soc_dapm_set_bias_level(dapm,
4357 soc_dapm_shutdown_dapm(&card->dapm);
4358 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4359 snd_soc_dapm_set_bias_level(&card->dapm,
4363 /* Module information */
4364 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4365 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4366 MODULE_LICENSE("GPL");