2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
46 #include <trace/events/asoc.h>
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
50 #define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
51 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
53 #define snd_soc_dapm_for_each_direction(dir) \
54 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
57 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
58 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
60 int (*connected)(struct snd_soc_dapm_widget *source,
61 struct snd_soc_dapm_widget *sink));
63 struct snd_soc_dapm_widget *
64 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
65 const struct snd_soc_dapm_widget *widget);
67 struct snd_soc_dapm_widget *
68 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
69 const struct snd_soc_dapm_widget *widget);
71 /* dapm power sequences - make this per codec in the future */
72 static int dapm_up_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_regulator_supply] = 1,
75 [snd_soc_dapm_clock_supply] = 1,
76 [snd_soc_dapm_supply] = 2,
77 [snd_soc_dapm_micbias] = 3,
78 [snd_soc_dapm_dai_link] = 2,
79 [snd_soc_dapm_dai_in] = 4,
80 [snd_soc_dapm_dai_out] = 4,
81 [snd_soc_dapm_aif_in] = 4,
82 [snd_soc_dapm_aif_out] = 4,
83 [snd_soc_dapm_mic] = 5,
84 [snd_soc_dapm_mux] = 6,
85 [snd_soc_dapm_demux] = 6,
86 [snd_soc_dapm_dac] = 7,
87 [snd_soc_dapm_switch] = 8,
88 [snd_soc_dapm_mixer] = 8,
89 [snd_soc_dapm_mixer_named_ctl] = 8,
90 [snd_soc_dapm_pga] = 9,
91 [snd_soc_dapm_adc] = 10,
92 [snd_soc_dapm_out_drv] = 11,
93 [snd_soc_dapm_hp] = 11,
94 [snd_soc_dapm_spk] = 11,
95 [snd_soc_dapm_line] = 11,
96 [snd_soc_dapm_kcontrol] = 12,
97 [snd_soc_dapm_post] = 13,
100 static int dapm_down_seq[] = {
101 [snd_soc_dapm_pre] = 0,
102 [snd_soc_dapm_kcontrol] = 1,
103 [snd_soc_dapm_adc] = 2,
104 [snd_soc_dapm_hp] = 3,
105 [snd_soc_dapm_spk] = 3,
106 [snd_soc_dapm_line] = 3,
107 [snd_soc_dapm_out_drv] = 3,
108 [snd_soc_dapm_pga] = 4,
109 [snd_soc_dapm_switch] = 5,
110 [snd_soc_dapm_mixer_named_ctl] = 5,
111 [snd_soc_dapm_mixer] = 5,
112 [snd_soc_dapm_dac] = 6,
113 [snd_soc_dapm_mic] = 7,
114 [snd_soc_dapm_micbias] = 8,
115 [snd_soc_dapm_mux] = 9,
116 [snd_soc_dapm_demux] = 9,
117 [snd_soc_dapm_aif_in] = 10,
118 [snd_soc_dapm_aif_out] = 10,
119 [snd_soc_dapm_dai_in] = 10,
120 [snd_soc_dapm_dai_out] = 10,
121 [snd_soc_dapm_dai_link] = 11,
122 [snd_soc_dapm_supply] = 12,
123 [snd_soc_dapm_clock_supply] = 13,
124 [snd_soc_dapm_regulator_supply] = 13,
125 [snd_soc_dapm_post] = 14,
128 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
130 if (dapm->card && dapm->card->instantiated)
131 lockdep_assert_held(&dapm->card->dapm_mutex);
134 static void pop_wait(u32 pop_time)
137 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
140 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
148 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
153 vsnprintf(buf, PAGE_SIZE, fmt, args);
154 dev_info(dev, "%s", buf);
160 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
162 return !list_empty(&w->dirty);
165 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
167 dapm_assert_locked(w->dapm);
169 if (!dapm_dirty_widget(w)) {
170 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
172 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
177 * Common implementation for dapm_widget_invalidate_input_paths() and
178 * dapm_widget_invalidate_output_paths(). The function is inlined since the
179 * combined size of the two specialized functions is only marginally larger then
180 * the size of the generic function and at the same time the fast path of the
181 * specialized functions is significantly smaller than the generic function.
183 static __always_inline void dapm_widget_invalidate_paths(
184 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
186 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
187 struct snd_soc_dapm_widget *node;
188 struct snd_soc_dapm_path *p;
191 dapm_assert_locked(w->dapm);
193 if (w->endpoints[dir] == -1)
196 list_add_tail(&w->work_list, &list);
197 w->endpoints[dir] = -1;
199 list_for_each_entry(w, &list, work_list) {
200 snd_soc_dapm_widget_for_each_path(w, dir, p) {
201 if (p->is_supply || p->weak || !p->connect)
203 node = p->node[rdir];
204 if (node->endpoints[dir] != -1) {
205 node->endpoints[dir] = -1;
206 list_add_tail(&node->work_list, &list);
213 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
215 * @w: The widget for which to invalidate the cached number of input paths
217 * Resets the cached number of inputs for the specified widget and all widgets
218 * that can be reached via outcoming paths from the widget.
220 * This function must be called if the number of output paths for a widget might
221 * have changed. E.g. if the source state of a widget changes or a path is added
222 * or activated with the widget as the sink.
224 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
226 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
230 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
232 * @w: The widget for which to invalidate the cached number of output paths
234 * Resets the cached number of outputs for the specified widget and all widgets
235 * that can be reached via incoming paths from the widget.
237 * This function must be called if the number of output paths for a widget might
238 * have changed. E.g. if the sink state of a widget changes or a path is added
239 * or activated with the widget as the source.
241 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
243 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
247 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
248 * for the widgets connected to a path
249 * @p: The path to invalidate
251 * Resets the cached number of inputs for the sink of the path and the cached
252 * number of outputs for the source of the path.
254 * This function must be called when a path is added, removed or the connected
257 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
260 * Weak paths or supply paths do not influence the number of input or
261 * output paths of their neighbors.
263 if (p->weak || p->is_supply)
267 * The number of connected endpoints is the sum of the number of
268 * connected endpoints of all neighbors. If a node with 0 connected
269 * endpoints is either connected or disconnected that sum won't change,
270 * so there is no need to re-check the path.
272 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
273 dapm_widget_invalidate_input_paths(p->sink);
274 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
275 dapm_widget_invalidate_output_paths(p->source);
278 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
280 struct snd_soc_dapm_widget *w;
282 mutex_lock(&card->dapm_mutex);
284 list_for_each_entry(w, &card->widgets, list) {
286 dapm_mark_dirty(w, "Rechecking endpoints");
287 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
288 dapm_widget_invalidate_output_paths(w);
289 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
290 dapm_widget_invalidate_input_paths(w);
294 mutex_unlock(&card->dapm_mutex);
296 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
298 /* create a new dapm widget */
299 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
300 const struct snd_soc_dapm_widget *_widget)
302 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
305 struct dapm_kcontrol_data {
307 struct snd_soc_dapm_widget *widget;
308 struct list_head paths;
309 struct snd_soc_dapm_widget_list *wlist;
312 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
313 struct snd_kcontrol *kcontrol, const char *ctrl_name)
315 struct dapm_kcontrol_data *data;
316 struct soc_mixer_control *mc;
321 data = kzalloc(sizeof(*data), GFP_KERNEL);
325 INIT_LIST_HEAD(&data->paths);
327 switch (widget->id) {
328 case snd_soc_dapm_switch:
329 case snd_soc_dapm_mixer:
330 case snd_soc_dapm_mixer_named_ctl:
331 mc = (struct soc_mixer_control *)kcontrol->private_value;
333 if (mc->autodisable) {
334 struct snd_soc_dapm_widget template;
336 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
343 memset(&template, 0, sizeof(template));
344 template.reg = mc->reg;
345 template.mask = (1 << fls(mc->max)) - 1;
346 template.shift = mc->shift;
348 template.off_val = mc->max;
350 template.off_val = 0;
351 template.on_val = template.off_val;
352 template.id = snd_soc_dapm_kcontrol;
353 template.name = name;
355 data->value = template.on_val;
358 snd_soc_dapm_new_control_unlocked(widget->dapm,
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", ctrl_name,
385 memset(&template, 0, sizeof(template));
386 template.reg = e->reg;
387 template.mask = e->mask;
388 template.shift = e->shift_l;
389 template.off_val = snd_soc_enum_item_to_val(e, 0);
390 template.on_val = template.off_val;
391 template.id = snd_soc_dapm_kcontrol;
392 template.name = name;
394 data->value = template.on_val;
396 data->widget = snd_soc_dapm_new_control_unlocked(
397 widget->dapm, &template);
399 if (IS_ERR(data->widget)) {
400 ret = PTR_ERR(data->widget);
408 snd_soc_dapm_add_path(widget->dapm, data->widget,
416 kcontrol->private_data = data;
425 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
427 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
429 list_del(&data->paths);
434 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
435 const struct snd_kcontrol *kcontrol)
437 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
442 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
443 struct snd_soc_dapm_widget *widget)
445 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
446 struct snd_soc_dapm_widget_list *new_wlist;
450 n = data->wlist->num_widgets + 1;
454 new_wlist = krealloc(data->wlist,
455 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
459 new_wlist->widgets[n - 1] = widget;
460 new_wlist->num_widgets = n;
462 data->wlist = new_wlist;
467 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
468 struct snd_soc_dapm_path *path)
470 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
472 list_add_tail(&path->list_kcontrol, &data->paths);
475 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
477 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
482 return data->widget->power;
485 static struct list_head *dapm_kcontrol_get_path_list(
486 const struct snd_kcontrol *kcontrol)
488 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 #define dapm_kcontrol_for_each_path(path, kcontrol) \
494 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
497 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
499 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
503 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
505 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
508 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
510 if (data->value == value)
514 switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
515 case snd_soc_dapm_switch:
516 case snd_soc_dapm_mixer:
517 case snd_soc_dapm_mixer_named_ctl:
518 data->widget->on_val = value & data->widget->mask;
520 case snd_soc_dapm_demux:
521 case snd_soc_dapm_mux:
522 data->widget->on_val = value >> data->widget->shift;
525 data->widget->on_val = value;
536 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
538 * @kcontrol: The kcontrol
540 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
541 struct snd_kcontrol *kcontrol)
543 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
545 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
548 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
550 * @kcontrol: The kcontrol
552 * Note: This function must only be used on kcontrols that are known to have
553 * been registered for a CODEC. Otherwise the behaviour is undefined.
555 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
556 struct snd_kcontrol *kcontrol)
558 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
560 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
562 static void dapm_reset(struct snd_soc_card *card)
564 struct snd_soc_dapm_widget *w;
566 lockdep_assert_held(&card->dapm_mutex);
568 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
570 list_for_each_entry(w, &card->widgets, list) {
571 w->new_power = w->power;
572 w->power_checked = false;
576 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
578 if (!dapm->component)
580 return dapm->component->name_prefix;
583 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
586 if (!dapm->component)
588 return snd_soc_component_read(dapm->component, reg, value);
591 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
592 int reg, unsigned int mask, unsigned int value)
594 if (!dapm->component)
596 return snd_soc_component_update_bits(dapm->component, reg,
600 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
601 int reg, unsigned int mask, unsigned int value)
603 if (!dapm->component)
605 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
608 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
611 snd_soc_component_async_complete(dapm->component);
614 static struct snd_soc_dapm_widget *
615 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
617 struct snd_soc_dapm_widget *w = wcache->widget;
618 struct list_head *wlist;
623 wlist = &w->dapm->card->widgets;
625 list_for_each_entry_from(w, wlist, list) {
626 if (!strcmp(name, w->name))
637 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
638 struct snd_soc_dapm_widget *w)
644 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
645 * @dapm: The DAPM context for which to set the level
646 * @level: The level to set
648 * Forces the DAPM bias level to a specific state. It will call the bias level
649 * callback of DAPM context with the specified level. This will even happen if
650 * the context is already at the same level. Furthermore it will not go through
651 * the normal bias level sequencing, meaning any intermediate states between the
652 * current and the target state will not be entered.
654 * Note that the change in bias level is only temporary and the next time
655 * snd_soc_dapm_sync() is called the state will be set to the level as
656 * determined by the DAPM core. The function is mainly intended to be used to
657 * used during probe or resume from suspend to power up the device so
658 * initialization can be done, before the DAPM core takes over.
660 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
661 enum snd_soc_bias_level level)
665 if (dapm->set_bias_level)
666 ret = dapm->set_bias_level(dapm, level);
669 dapm->bias_level = level;
673 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
676 * snd_soc_dapm_set_bias_level - set the bias level for the system
677 * @dapm: DAPM context
678 * @level: level to configure
680 * Configure the bias (power) levels for the SoC audio device.
682 * Returns 0 for success else error.
684 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
685 enum snd_soc_bias_level level)
687 struct snd_soc_card *card = dapm->card;
690 trace_snd_soc_bias_level_start(card, level);
692 if (card && card->set_bias_level)
693 ret = card->set_bias_level(card, dapm, level);
697 if (!card || dapm != &card->dapm)
698 ret = snd_soc_dapm_force_bias_level(dapm, level);
703 if (card && card->set_bias_level_post)
704 ret = card->set_bias_level_post(card, dapm, level);
706 trace_snd_soc_bias_level_done(card, level);
711 /* connect mux widget to its interconnecting audio paths */
712 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
713 struct snd_soc_dapm_path *path, const char *control_name,
714 struct snd_soc_dapm_widget *w)
716 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
717 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
718 unsigned int val, item;
721 if (e->reg != SND_SOC_NOPM) {
722 soc_dapm_read(dapm, e->reg, &val);
723 val = (val >> e->shift_l) & e->mask;
724 item = snd_soc_enum_val_to_item(e, val);
726 /* since a virtual mux has no backing registers to
727 * decide which path to connect, it will try to match
728 * with the first enumeration. This is to ensure
729 * that the default mux choice (the first) will be
730 * correctly powered up during initialization.
735 for (i = 0; i < e->items; i++) {
736 if (!(strcmp(control_name, e->texts[i]))) {
737 path->name = e->texts[i];
749 /* set up initial codec paths */
750 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
752 struct soc_mixer_control *mc = (struct soc_mixer_control *)
753 p->sink->kcontrol_news[i].private_value;
754 unsigned int reg = mc->reg;
755 unsigned int shift = mc->shift;
756 unsigned int max = mc->max;
757 unsigned int mask = (1 << fls(max)) - 1;
758 unsigned int invert = mc->invert;
761 if (reg != SND_SOC_NOPM) {
762 soc_dapm_read(p->sink->dapm, reg, &val);
763 val = (val >> shift) & mask;
768 /* since a virtual mixer has no backing registers to
769 * decide which path to connect, it will try to match
770 * with initial state. This is to ensure
771 * that the default mixer choice will be
772 * correctly powered up during initialization.
778 /* connect mixer widget to its interconnecting audio paths */
779 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
780 struct snd_soc_dapm_path *path, const char *control_name)
784 /* search for mixer kcontrol */
785 for (i = 0; i < path->sink->num_kcontrols; i++) {
786 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
787 path->name = path->sink->kcontrol_news[i].name;
788 dapm_set_mixer_path_status(path, i);
795 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
796 struct snd_soc_dapm_widget *kcontrolw,
797 const struct snd_kcontrol_new *kcontrol_new,
798 struct snd_kcontrol **kcontrol)
800 struct snd_soc_dapm_widget *w;
805 list_for_each_entry(w, &dapm->card->widgets, list) {
806 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
808 for (i = 0; i < w->num_kcontrols; i++) {
809 if (&w->kcontrol_news[i] == kcontrol_new) {
811 *kcontrol = w->kcontrols[i];
821 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
822 * create it. Either way, add the widget into the control's widget list
824 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
827 struct snd_soc_dapm_context *dapm = w->dapm;
828 struct snd_card *card = dapm->card->snd_card;
832 struct snd_kcontrol *kcontrol;
833 bool wname_in_long_name, kcname_in_long_name;
834 char *long_name = NULL;
838 prefix = soc_dapm_prefix(dapm);
840 prefix_len = strlen(prefix) + 1;
844 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
849 wname_in_long_name = false;
850 kcname_in_long_name = true;
853 case snd_soc_dapm_switch:
854 case snd_soc_dapm_mixer:
855 case snd_soc_dapm_pga:
856 case snd_soc_dapm_out_drv:
857 wname_in_long_name = true;
858 kcname_in_long_name = true;
860 case snd_soc_dapm_mixer_named_ctl:
861 wname_in_long_name = false;
862 kcname_in_long_name = true;
864 case snd_soc_dapm_demux:
865 case snd_soc_dapm_mux:
866 wname_in_long_name = true;
867 kcname_in_long_name = false;
874 if (wname_in_long_name && kcname_in_long_name) {
876 * The control will get a prefix from the control
877 * creation process but we're also using the same
878 * prefix for widgets so cut the prefix off the
879 * front of the widget name.
881 long_name = kasprintf(GFP_KERNEL, "%s %s",
882 w->name + prefix_len,
883 w->kcontrol_news[kci].name);
884 if (long_name == NULL)
888 } else if (wname_in_long_name) {
890 name = w->name + prefix_len;
893 name = w->kcontrol_news[kci].name;
896 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
903 kcontrol->private_free = dapm_kcontrol_free;
905 ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
907 snd_ctl_free_one(kcontrol);
911 ret = snd_ctl_add(card, kcontrol);
914 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
920 ret = dapm_kcontrol_add_widget(kcontrol, w);
922 w->kcontrols[kci] = kcontrol;
930 /* create new dapm mixer control */
931 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
934 struct snd_soc_dapm_path *path;
935 struct dapm_kcontrol_data *data;
938 for (i = 0; i < w->num_kcontrols; i++) {
940 snd_soc_dapm_widget_for_each_source_path(w, path) {
941 /* mixer/mux paths name must match control name */
942 if (path->name != (char *)w->kcontrol_news[i].name)
945 if (!w->kcontrols[i]) {
946 ret = dapm_create_or_share_kcontrol(w, i);
951 dapm_kcontrol_add_path(w->kcontrols[i], path);
953 data = snd_kcontrol_chip(w->kcontrols[i]);
955 snd_soc_dapm_add_path(data->widget->dapm,
965 /* create new dapm mux control */
966 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
968 struct snd_soc_dapm_context *dapm = w->dapm;
969 enum snd_soc_dapm_direction dir;
970 struct snd_soc_dapm_path *path;
975 case snd_soc_dapm_mux:
976 dir = SND_SOC_DAPM_DIR_OUT;
979 case snd_soc_dapm_demux:
980 dir = SND_SOC_DAPM_DIR_IN;
987 if (w->num_kcontrols != 1) {
989 "ASoC: %s %s has incorrect number of controls\n", type,
994 if (list_empty(&w->edges[dir])) {
995 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
999 ret = dapm_create_or_share_kcontrol(w, 0);
1003 snd_soc_dapm_widget_for_each_path(w, dir, path) {
1005 dapm_kcontrol_add_path(w->kcontrols[0], path);
1011 /* create new dapm volume control */
1012 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
1016 for (i = 0; i < w->num_kcontrols; i++) {
1017 ret = dapm_create_or_share_kcontrol(w, i);
1025 /* create new dapm dai link control */
1026 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1029 struct snd_kcontrol *kcontrol;
1030 struct snd_soc_dapm_context *dapm = w->dapm;
1031 struct snd_card *card = dapm->card->snd_card;
1033 /* create control for links with > 1 config */
1034 if (w->num_params <= 1)
1038 for (i = 0; i < w->num_kcontrols; i++) {
1039 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1041 ret = snd_ctl_add(card, kcontrol);
1044 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1045 w->name, w->kcontrol_news[i].name, ret);
1048 kcontrol->private_data = w;
1049 w->kcontrols[i] = kcontrol;
1055 /* We implement power down on suspend by checking the power state of
1056 * the ALSA card - when we are suspending the ALSA state for the card
1059 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1061 int level = snd_power_get_state(widget->dapm->card->snd_card);
1064 case SNDRV_CTL_POWER_D3hot:
1065 case SNDRV_CTL_POWER_D3cold:
1066 if (widget->ignore_suspend)
1067 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1069 return widget->ignore_suspend;
1075 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1076 struct list_head *widgets)
1078 struct snd_soc_dapm_widget *w;
1079 struct list_head *it;
1080 unsigned int size = 0;
1083 list_for_each(it, widgets)
1086 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1090 list_for_each_entry(w, widgets, work_list)
1091 (*list)->widgets[i++] = w;
1093 (*list)->num_widgets = i;
1099 * Common implementation for is_connected_output_ep() and
1100 * is_connected_input_ep(). The function is inlined since the combined size of
1101 * the two specialized functions is only marginally larger then the size of the
1102 * generic function and at the same time the fast path of the specialized
1103 * functions is significantly smaller than the generic function.
1105 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1106 struct list_head *list, enum snd_soc_dapm_direction dir,
1107 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
1108 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1109 enum snd_soc_dapm_direction)),
1110 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1111 enum snd_soc_dapm_direction))
1113 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1114 struct snd_soc_dapm_path *path;
1117 if (widget->endpoints[dir] >= 0)
1118 return widget->endpoints[dir];
1120 DAPM_UPDATE_STAT(widget, path_checks);
1122 /* do we need to add this widget to the list ? */
1124 list_add_tail(&widget->work_list, list);
1126 if (custom_stop_condition && custom_stop_condition(widget, dir)) {
1128 custom_stop_condition = NULL;
1131 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1132 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1133 return widget->endpoints[dir];
1136 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1137 DAPM_UPDATE_STAT(widget, neighbour_checks);
1139 if (path->weak || path->is_supply)
1145 trace_snd_soc_dapm_path(widget, dir, path);
1147 if (path->connect) {
1149 con += fn(path->node[dir], list, custom_stop_condition);
1154 widget->endpoints[dir] = con;
1160 * Recursively check for a completed path to an active or physically connected
1161 * output widget. Returns number of complete paths.
1163 * Optionally, can be supplied with a function acting as a stopping condition.
1164 * This function takes the dapm widget currently being examined and the walk
1165 * direction as an arguments, it should return true if widgets from that point
1166 * in the graph onwards should not be added to the widget list.
1168 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1169 struct list_head *list,
1170 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1171 enum snd_soc_dapm_direction))
1173 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1174 is_connected_output_ep, custom_stop_condition);
1178 * Recursively check for a completed path to an active or physically connected
1179 * input widget. Returns number of complete paths.
1181 * Optionally, can be supplied with a function acting as a stopping condition.
1182 * This function takes the dapm widget currently being examined and the walk
1183 * direction as an arguments, it should return true if the walk should be
1184 * stopped and false otherwise.
1186 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1187 struct list_head *list,
1188 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1189 enum snd_soc_dapm_direction))
1191 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1192 is_connected_input_ep, custom_stop_condition);
1196 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1197 * @dai: the soc DAI.
1198 * @stream: stream direction.
1199 * @list: list of active widgets for this stream.
1200 * @custom_stop_condition: (optional) a function meant to stop the widget graph
1201 * walk based on custom logic.
1203 * Queries DAPM graph as to whether a valid audio stream path exists for
1204 * the initial stream specified by name. This takes into account
1205 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1207 * Optionally, can be supplied with a function acting as a stopping condition.
1208 * This function takes the dapm widget currently being examined and the walk
1209 * direction as an arguments, it should return true if the walk should be
1210 * stopped and false otherwise.
1212 * Returns the number of valid paths or negative error.
1214 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1215 struct snd_soc_dapm_widget_list **list,
1216 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1217 enum snd_soc_dapm_direction))
1219 struct snd_soc_card *card = dai->component->card;
1220 struct snd_soc_dapm_widget *w;
1225 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1228 * For is_connected_{output,input}_ep fully discover the graph we need
1229 * to reset the cached number of inputs and outputs.
1231 list_for_each_entry(w, &card->widgets, list) {
1232 w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
1233 w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
1236 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1237 paths = is_connected_output_ep(dai->playback_widget, &widgets,
1238 custom_stop_condition);
1240 paths = is_connected_input_ep(dai->capture_widget, &widgets,
1241 custom_stop_condition);
1243 /* Drop starting point */
1244 list_del(widgets.next);
1246 ret = dapm_widget_list_create(list, &widgets);
1250 trace_snd_soc_dapm_connected(paths, stream);
1251 mutex_unlock(&card->dapm_mutex);
1257 * Handler for regulator supply widget.
1259 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1260 struct snd_kcontrol *kcontrol, int event)
1264 soc_dapm_async_complete(w->dapm);
1266 if (SND_SOC_DAPM_EVENT_ON(event)) {
1267 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1268 ret = regulator_allow_bypass(w->regulator, false);
1270 dev_warn(w->dapm->dev,
1271 "ASoC: Failed to unbypass %s: %d\n",
1275 return regulator_enable(w->regulator);
1277 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1278 ret = regulator_allow_bypass(w->regulator, true);
1280 dev_warn(w->dapm->dev,
1281 "ASoC: Failed to bypass %s: %d\n",
1285 return regulator_disable_deferred(w->regulator, w->shift);
1288 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1291 * Handler for clock supply widget.
1293 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1294 struct snd_kcontrol *kcontrol, int event)
1299 soc_dapm_async_complete(w->dapm);
1301 #ifdef CONFIG_HAVE_CLK
1302 if (SND_SOC_DAPM_EVENT_ON(event)) {
1303 return clk_prepare_enable(w->clk);
1305 clk_disable_unprepare(w->clk);
1311 EXPORT_SYMBOL_GPL(dapm_clock_event);
1313 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1315 if (w->power_checked)
1316 return w->new_power;
1321 w->new_power = w->power_check(w);
1323 w->power_checked = true;
1325 return w->new_power;
1328 /* Generic check to see if a widget should be powered. */
1329 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1333 DAPM_UPDATE_STAT(w, power_checks);
1335 in = is_connected_input_ep(w, NULL, NULL);
1336 out = is_connected_output_ep(w, NULL, NULL);
1337 return out != 0 && in != 0;
1340 /* Check to see if a power supply is needed */
1341 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1343 struct snd_soc_dapm_path *path;
1345 DAPM_UPDATE_STAT(w, power_checks);
1347 /* Check if one of our outputs is connected */
1348 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1349 DAPM_UPDATE_STAT(w, neighbour_checks);
1354 if (path->connected &&
1355 !path->connected(path->source, path->sink))
1358 if (dapm_widget_power_check(path->sink))
1365 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1367 return w->connected;
1370 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1371 struct snd_soc_dapm_widget *b,
1379 sort = dapm_down_seq;
1381 if (sort[a->id] != sort[b->id])
1382 return sort[a->id] - sort[b->id];
1383 if (a->subseq != b->subseq) {
1385 return a->subseq - b->subseq;
1387 return b->subseq - a->subseq;
1389 if (a->reg != b->reg)
1390 return a->reg - b->reg;
1391 if (a->dapm != b->dapm)
1392 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1397 /* Insert a widget in order into a DAPM power sequence. */
1398 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1399 struct list_head *list,
1402 struct snd_soc_dapm_widget *w;
1404 list_for_each_entry(w, list, power_list)
1405 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1406 list_add_tail(&new_widget->power_list, &w->power_list);
1410 list_add_tail(&new_widget->power_list, list);
1413 static void dapm_seq_check_event(struct snd_soc_card *card,
1414 struct snd_soc_dapm_widget *w, int event)
1416 const char *ev_name;
1420 case SND_SOC_DAPM_PRE_PMU:
1421 ev_name = "PRE_PMU";
1424 case SND_SOC_DAPM_POST_PMU:
1425 ev_name = "POST_PMU";
1428 case SND_SOC_DAPM_PRE_PMD:
1429 ev_name = "PRE_PMD";
1432 case SND_SOC_DAPM_POST_PMD:
1433 ev_name = "POST_PMD";
1436 case SND_SOC_DAPM_WILL_PMU:
1437 ev_name = "WILL_PMU";
1440 case SND_SOC_DAPM_WILL_PMD:
1441 ev_name = "WILL_PMD";
1445 WARN(1, "Unknown event %d\n", event);
1449 if (w->new_power != power)
1452 if (w->event && (w->event_flags & event)) {
1453 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1455 soc_dapm_async_complete(w->dapm);
1456 trace_snd_soc_dapm_widget_event_start(w, event);
1457 ret = w->event(w, NULL, event);
1458 trace_snd_soc_dapm_widget_event_done(w, event);
1460 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1461 ev_name, w->name, ret);
1465 /* Apply the coalesced changes from a DAPM sequence */
1466 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1467 struct list_head *pending)
1469 struct snd_soc_dapm_context *dapm;
1470 struct snd_soc_dapm_widget *w;
1472 unsigned int value = 0;
1473 unsigned int mask = 0;
1475 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1479 list_for_each_entry(w, pending, power_list) {
1480 WARN_ON(reg != w->reg || dapm != w->dapm);
1481 w->power = w->new_power;
1483 mask |= w->mask << w->shift;
1485 value |= w->on_val << w->shift;
1487 value |= w->off_val << w->shift;
1489 pop_dbg(dapm->dev, card->pop_time,
1490 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1491 w->name, reg, value, mask);
1493 /* Check for events */
1494 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1495 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1499 /* Any widget will do, they should all be updating the
1503 pop_dbg(dapm->dev, card->pop_time,
1504 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1505 value, mask, reg, card->pop_time);
1506 pop_wait(card->pop_time);
1507 soc_dapm_update_bits(dapm, reg, mask, value);
1510 list_for_each_entry(w, pending, power_list) {
1511 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1512 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1516 /* Apply a DAPM power sequence.
1518 * We walk over a pre-sorted list of widgets to apply power to. In
1519 * order to minimise the number of writes to the device required
1520 * multiple widgets will be updated in a single write where possible.
1521 * Currently anything that requires more than a single write is not
1524 static void dapm_seq_run(struct snd_soc_card *card,
1525 struct list_head *list, int event, bool power_up)
1527 struct snd_soc_dapm_widget *w, *n;
1528 struct snd_soc_dapm_context *d;
1531 int cur_subseq = -1;
1532 int cur_reg = SND_SOC_NOPM;
1533 struct snd_soc_dapm_context *cur_dapm = NULL;
1540 sort = dapm_down_seq;
1542 list_for_each_entry_safe(w, n, list, power_list) {
1545 /* Do we need to apply any queued changes? */
1546 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1547 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1548 if (!list_empty(&pending))
1549 dapm_seq_run_coalesced(card, &pending);
1551 if (cur_dapm && cur_dapm->seq_notifier) {
1552 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1553 if (sort[i] == cur_sort)
1554 cur_dapm->seq_notifier(cur_dapm,
1559 if (cur_dapm && w->dapm != cur_dapm)
1560 soc_dapm_async_complete(cur_dapm);
1562 INIT_LIST_HEAD(&pending);
1564 cur_subseq = INT_MIN;
1565 cur_reg = SND_SOC_NOPM;
1570 case snd_soc_dapm_pre:
1574 if (event == SND_SOC_DAPM_STREAM_START)
1576 NULL, SND_SOC_DAPM_PRE_PMU);
1577 else if (event == SND_SOC_DAPM_STREAM_STOP)
1579 NULL, SND_SOC_DAPM_PRE_PMD);
1582 case snd_soc_dapm_post:
1586 if (event == SND_SOC_DAPM_STREAM_START)
1588 NULL, SND_SOC_DAPM_POST_PMU);
1589 else if (event == SND_SOC_DAPM_STREAM_STOP)
1591 NULL, SND_SOC_DAPM_POST_PMD);
1595 /* Queue it up for application */
1596 cur_sort = sort[w->id];
1597 cur_subseq = w->subseq;
1600 list_move(&w->power_list, &pending);
1605 dev_err(w->dapm->dev,
1606 "ASoC: Failed to apply widget power: %d\n", ret);
1609 if (!list_empty(&pending))
1610 dapm_seq_run_coalesced(card, &pending);
1612 if (cur_dapm && cur_dapm->seq_notifier) {
1613 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1614 if (sort[i] == cur_sort)
1615 cur_dapm->seq_notifier(cur_dapm,
1619 list_for_each_entry(d, &card->dapm_list, list) {
1620 soc_dapm_async_complete(d);
1624 static void dapm_widget_update(struct snd_soc_card *card)
1626 struct snd_soc_dapm_update *update = card->update;
1627 struct snd_soc_dapm_widget_list *wlist;
1628 struct snd_soc_dapm_widget *w = NULL;
1632 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1635 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1637 for (wi = 0; wi < wlist->num_widgets; wi++) {
1638 w = wlist->widgets[wi];
1640 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1641 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1643 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1651 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1654 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1657 for (wi = 0; wi < wlist->num_widgets; wi++) {
1658 w = wlist->widgets[wi];
1660 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1661 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1663 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1669 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1670 * they're changing state.
1672 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1674 struct snd_soc_dapm_context *d = data;
1677 /* If we're off and we're not supposed to go into STANDBY */
1678 if (d->bias_level == SND_SOC_BIAS_OFF &&
1679 d->target_bias_level != SND_SOC_BIAS_OFF) {
1681 pm_runtime_get_sync(d->dev);
1683 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1686 "ASoC: Failed to turn on bias: %d\n", ret);
1689 /* Prepare for a transition to ON or away from ON */
1690 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1691 d->bias_level != SND_SOC_BIAS_ON) ||
1692 (d->target_bias_level != SND_SOC_BIAS_ON &&
1693 d->bias_level == SND_SOC_BIAS_ON)) {
1694 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1697 "ASoC: Failed to prepare bias: %d\n", ret);
1701 /* Async callback run prior to DAPM sequences - brings to their final
1704 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1706 struct snd_soc_dapm_context *d = data;
1709 /* If we just powered the last thing off drop to standby bias */
1710 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1711 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1712 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1713 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1715 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1719 /* If we're in standby and can support bias off then do that */
1720 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1721 d->target_bias_level == SND_SOC_BIAS_OFF) {
1722 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1724 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1728 pm_runtime_put(d->dev);
1731 /* If we just powered up then move to active bias */
1732 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1733 d->target_bias_level == SND_SOC_BIAS_ON) {
1734 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1736 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1741 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1742 bool power, bool connect)
1744 /* If a connection is being made or broken then that update
1745 * will have marked the peer dirty, otherwise the widgets are
1746 * not connected and this update has no impact. */
1750 /* If the peer is already in the state we're moving to then we
1751 * won't have an impact on it. */
1752 if (power != peer->power)
1753 dapm_mark_dirty(peer, "peer state change");
1756 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1757 struct list_head *up_list,
1758 struct list_head *down_list)
1760 struct snd_soc_dapm_path *path;
1762 if (w->power == power)
1765 trace_snd_soc_dapm_widget_power(w, power);
1767 /* If we changed our power state perhaps our neigbours changed
1770 snd_soc_dapm_widget_for_each_source_path(w, path)
1771 dapm_widget_set_peer_power(path->source, power, path->connect);
1773 /* Supplies can't affect their outputs, only their inputs */
1774 if (!w->is_supply) {
1775 snd_soc_dapm_widget_for_each_sink_path(w, path)
1776 dapm_widget_set_peer_power(path->sink, power,
1781 dapm_seq_insert(w, up_list, true);
1783 dapm_seq_insert(w, down_list, false);
1786 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1787 struct list_head *up_list,
1788 struct list_head *down_list)
1793 case snd_soc_dapm_pre:
1794 dapm_seq_insert(w, down_list, false);
1796 case snd_soc_dapm_post:
1797 dapm_seq_insert(w, up_list, true);
1801 power = dapm_widget_power_check(w);
1803 dapm_widget_set_power(w, power, up_list, down_list);
1808 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1810 if (dapm->idle_bias_off)
1813 switch (snd_power_get_state(dapm->card->snd_card)) {
1814 case SNDRV_CTL_POWER_D3hot:
1815 case SNDRV_CTL_POWER_D3cold:
1816 return dapm->suspend_bias_off;
1825 * Scan each dapm widget for complete audio path.
1826 * A complete path is a route that has valid endpoints i.e.:-
1828 * o DAC to output pin.
1829 * o Input pin to ADC.
1830 * o Input pin to Output pin (bypass, sidetone)
1831 * o DAC to ADC (loopback).
1833 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1835 struct snd_soc_dapm_widget *w;
1836 struct snd_soc_dapm_context *d;
1838 LIST_HEAD(down_list);
1839 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1840 enum snd_soc_bias_level bias;
1842 lockdep_assert_held(&card->dapm_mutex);
1844 trace_snd_soc_dapm_start(card);
1846 list_for_each_entry(d, &card->dapm_list, list) {
1847 if (dapm_idle_bias_off(d))
1848 d->target_bias_level = SND_SOC_BIAS_OFF;
1850 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1855 /* Check which widgets we need to power and store them in
1856 * lists indicating if they should be powered up or down. We
1857 * only check widgets that have been flagged as dirty but note
1858 * that new widgets may be added to the dirty list while we
1861 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1862 dapm_power_one_widget(w, &up_list, &down_list);
1865 list_for_each_entry(w, &card->widgets, list) {
1867 case snd_soc_dapm_pre:
1868 case snd_soc_dapm_post:
1869 /* These widgets always need to be powered */
1872 list_del_init(&w->dirty);
1879 /* Supplies and micbiases only bring the
1880 * context up to STANDBY as unless something
1881 * else is active and passing audio they
1882 * generally don't require full power. Signal
1883 * generators are virtual pins and have no
1884 * power impact themselves.
1887 case snd_soc_dapm_siggen:
1888 case snd_soc_dapm_vmid:
1890 case snd_soc_dapm_supply:
1891 case snd_soc_dapm_regulator_supply:
1892 case snd_soc_dapm_clock_supply:
1893 case snd_soc_dapm_micbias:
1894 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1895 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1898 d->target_bias_level = SND_SOC_BIAS_ON;
1905 /* Force all contexts in the card to the same bias state if
1906 * they're not ground referenced.
1908 bias = SND_SOC_BIAS_OFF;
1909 list_for_each_entry(d, &card->dapm_list, list)
1910 if (d->target_bias_level > bias)
1911 bias = d->target_bias_level;
1912 list_for_each_entry(d, &card->dapm_list, list)
1913 if (!dapm_idle_bias_off(d))
1914 d->target_bias_level = bias;
1916 trace_snd_soc_dapm_walk_done(card);
1918 /* Run card bias changes at first */
1919 dapm_pre_sequence_async(&card->dapm, 0);
1920 /* Run other bias changes in parallel */
1921 list_for_each_entry(d, &card->dapm_list, list) {
1922 if (d != &card->dapm)
1923 async_schedule_domain(dapm_pre_sequence_async, d,
1926 async_synchronize_full_domain(&async_domain);
1928 list_for_each_entry(w, &down_list, power_list) {
1929 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1932 list_for_each_entry(w, &up_list, power_list) {
1933 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1936 /* Power down widgets first; try to avoid amplifying pops. */
1937 dapm_seq_run(card, &down_list, event, false);
1939 dapm_widget_update(card);
1942 dapm_seq_run(card, &up_list, event, true);
1944 /* Run all the bias changes in parallel */
1945 list_for_each_entry(d, &card->dapm_list, list) {
1946 if (d != &card->dapm)
1947 async_schedule_domain(dapm_post_sequence_async, d,
1950 async_synchronize_full_domain(&async_domain);
1951 /* Run card bias changes at last */
1952 dapm_post_sequence_async(&card->dapm, 0);
1954 /* do we need to notify any clients that DAPM event is complete */
1955 list_for_each_entry(d, &card->dapm_list, list) {
1956 if (d->stream_event)
1957 d->stream_event(d, event);
1960 pop_dbg(card->dev, card->pop_time,
1961 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1962 pop_wait(card->pop_time);
1964 trace_snd_soc_dapm_done(card);
1969 #ifdef CONFIG_DEBUG_FS
1970 static ssize_t dapm_widget_power_read_file(struct file *file,
1971 char __user *user_buf,
1972 size_t count, loff_t *ppos)
1974 struct snd_soc_dapm_widget *w = file->private_data;
1975 struct snd_soc_card *card = w->dapm->card;
1976 enum snd_soc_dapm_direction dir, rdir;
1980 struct snd_soc_dapm_path *p = NULL;
1982 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1986 mutex_lock(&card->dapm_mutex);
1988 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1993 in = is_connected_input_ep(w, NULL, NULL);
1994 out = is_connected_output_ep(w, NULL, NULL);
1997 ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1998 w->name, w->power ? "On" : "Off",
1999 w->force ? " (forced)" : "", in, out);
2002 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2003 " - R%d(0x%x) mask 0x%x",
2004 w->reg, w->reg, w->mask << w->shift);
2006 ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
2009 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
2011 w->active ? "active" : "inactive");
2013 snd_soc_dapm_for_each_direction(dir) {
2014 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
2015 snd_soc_dapm_widget_for_each_path(w, dir, p) {
2016 if (p->connected && !p->connected(w, p->node[rdir]))
2022 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2023 " %s \"%s\" \"%s\"\n",
2024 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
2025 p->name ? p->name : "static",
2026 p->node[rdir]->name);
2030 mutex_unlock(&card->dapm_mutex);
2032 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2038 static const struct file_operations dapm_widget_power_fops = {
2039 .open = simple_open,
2040 .read = dapm_widget_power_read_file,
2041 .llseek = default_llseek,
2044 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2045 size_t count, loff_t *ppos)
2047 struct snd_soc_dapm_context *dapm = file->private_data;
2050 switch (dapm->bias_level) {
2051 case SND_SOC_BIAS_ON:
2054 case SND_SOC_BIAS_PREPARE:
2055 level = "Prepare\n";
2057 case SND_SOC_BIAS_STANDBY:
2058 level = "Standby\n";
2060 case SND_SOC_BIAS_OFF:
2064 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2065 level = "Unknown\n";
2069 return simple_read_from_buffer(user_buf, count, ppos, level,
2073 static const struct file_operations dapm_bias_fops = {
2074 .open = simple_open,
2075 .read = dapm_bias_read_file,
2076 .llseek = default_llseek,
2079 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2080 struct dentry *parent)
2087 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2089 if (!dapm->debugfs_dapm) {
2091 "ASoC: Failed to create DAPM debugfs directory\n");
2095 d = debugfs_create_file("bias_level", 0444,
2096 dapm->debugfs_dapm, dapm,
2100 "ASoC: Failed to create bias level debugfs file\n");
2103 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2105 struct snd_soc_dapm_context *dapm = w->dapm;
2108 if (!dapm->debugfs_dapm || !w->name)
2111 d = debugfs_create_file(w->name, 0444,
2112 dapm->debugfs_dapm, w,
2113 &dapm_widget_power_fops);
2115 dev_warn(w->dapm->dev,
2116 "ASoC: Failed to create %s debugfs file\n",
2120 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2122 debugfs_remove_recursive(dapm->debugfs_dapm);
2126 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2127 struct dentry *parent)
2131 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2135 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2142 * soc_dapm_connect_path() - Connects or disconnects a path
2143 * @path: The path to update
2144 * @connect: The new connect state of the path. True if the path is connected,
2145 * false if it is disconnected.
2146 * @reason: The reason why the path changed (for debugging only)
2148 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2149 bool connect, const char *reason)
2151 if (path->connect == connect)
2154 path->connect = connect;
2155 dapm_mark_dirty(path->source, reason);
2156 dapm_mark_dirty(path->sink, reason);
2157 dapm_path_invalidate(path);
2160 /* test and update the power status of a mux widget */
2161 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2162 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2164 struct snd_soc_dapm_path *path;
2168 lockdep_assert_held(&card->dapm_mutex);
2170 /* find dapm widget path assoc with kcontrol */
2171 dapm_kcontrol_for_each_path(path, kcontrol) {
2173 /* we now need to match the string in the enum to the path */
2174 if (!(strcmp(path->name, e->texts[mux])))
2179 soc_dapm_connect_path(path, connect, "mux update");
2183 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2188 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2189 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2190 struct snd_soc_dapm_update *update)
2192 struct snd_soc_card *card = dapm->card;
2195 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2196 card->update = update;
2197 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2198 card->update = NULL;
2199 mutex_unlock(&card->dapm_mutex);
2201 soc_dpcm_runtime_update(card);
2204 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2206 /* test and update the power status of a mixer or switch widget */
2207 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2208 struct snd_kcontrol *kcontrol, int connect)
2210 struct snd_soc_dapm_path *path;
2213 lockdep_assert_held(&card->dapm_mutex);
2215 /* find dapm widget path assoc with kcontrol */
2216 dapm_kcontrol_for_each_path(path, kcontrol) {
2218 soc_dapm_connect_path(path, connect, "mixer update");
2222 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2227 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2228 struct snd_kcontrol *kcontrol, int connect,
2229 struct snd_soc_dapm_update *update)
2231 struct snd_soc_card *card = dapm->card;
2234 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2235 card->update = update;
2236 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2237 card->update = NULL;
2238 mutex_unlock(&card->dapm_mutex);
2240 soc_dpcm_runtime_update(card);
2243 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2245 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2248 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2249 struct snd_soc_dapm_widget *w;
2251 char *state = "not set";
2253 /* card won't be set for the dummy component, as a spot fix
2254 * we're checking for that case specifically here but in future
2255 * we will ensure that the dummy component looks like others.
2260 list_for_each_entry(w, &cmpnt->card->widgets, list) {
2261 if (w->dapm != dapm)
2264 /* only display widgets that burn power */
2266 case snd_soc_dapm_hp:
2267 case snd_soc_dapm_mic:
2268 case snd_soc_dapm_spk:
2269 case snd_soc_dapm_line:
2270 case snd_soc_dapm_micbias:
2271 case snd_soc_dapm_dac:
2272 case snd_soc_dapm_adc:
2273 case snd_soc_dapm_pga:
2274 case snd_soc_dapm_out_drv:
2275 case snd_soc_dapm_mixer:
2276 case snd_soc_dapm_mixer_named_ctl:
2277 case snd_soc_dapm_supply:
2278 case snd_soc_dapm_regulator_supply:
2279 case snd_soc_dapm_clock_supply:
2281 count += sprintf(buf + count, "%s: %s\n",
2282 w->name, w->power ? "On":"Off");
2289 switch (snd_soc_dapm_get_bias_level(dapm)) {
2290 case SND_SOC_BIAS_ON:
2293 case SND_SOC_BIAS_PREPARE:
2296 case SND_SOC_BIAS_STANDBY:
2299 case SND_SOC_BIAS_OFF:
2303 count += sprintf(buf + count, "PM State: %s\n", state);
2308 /* show dapm widget status in sys fs */
2309 static ssize_t dapm_widget_show(struct device *dev,
2310 struct device_attribute *attr, char *buf)
2312 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2315 mutex_lock(&rtd->card->dapm_mutex);
2317 for (i = 0; i < rtd->num_codecs; i++) {
2318 struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
2320 count += dapm_widget_show_component(cmpnt, buf + count);
2323 mutex_unlock(&rtd->card->dapm_mutex);
2328 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2330 struct attribute *soc_dapm_dev_attrs[] = {
2331 &dev_attr_dapm_widget.attr,
2335 static void dapm_free_path(struct snd_soc_dapm_path *path)
2337 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2338 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2339 list_del(&path->list_kcontrol);
2340 list_del(&path->list);
2344 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2346 struct snd_soc_dapm_path *p, *next_p;
2347 enum snd_soc_dapm_direction dir;
2350 list_del(&w->dirty);
2352 * remove source and sink paths associated to this widget.
2353 * While removing the path, remove reference to it from both
2354 * source and sink widgets so that path is removed only once.
2356 snd_soc_dapm_for_each_direction(dir) {
2357 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2361 kfree(w->kcontrols);
2362 kfree_const(w->name);
2366 void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
2368 dapm->path_sink_cache.widget = NULL;
2369 dapm->path_source_cache.widget = NULL;
2372 /* free all dapm widgets and resources */
2373 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2375 struct snd_soc_dapm_widget *w, *next_w;
2377 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2378 if (w->dapm != dapm)
2380 snd_soc_dapm_free_widget(w);
2382 snd_soc_dapm_reset_cache(dapm);
2385 static struct snd_soc_dapm_widget *dapm_find_widget(
2386 struct snd_soc_dapm_context *dapm, const char *pin,
2387 bool search_other_contexts)
2389 struct snd_soc_dapm_widget *w;
2390 struct snd_soc_dapm_widget *fallback = NULL;
2392 list_for_each_entry(w, &dapm->card->widgets, list) {
2393 if (!strcmp(w->name, pin)) {
2394 if (w->dapm == dapm)
2401 if (search_other_contexts)
2408 * set the DAPM pin status:
2409 * returns 1 when the value has been updated, 0 when unchanged, or a negative
2410 * error code; called from kcontrol put callback
2412 static int __snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2413 const char *pin, int status)
2415 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2418 dapm_assert_locked(dapm);
2421 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2425 if (w->connected != status) {
2426 dapm_mark_dirty(w, "pin configuration");
2427 dapm_widget_invalidate_input_paths(w);
2428 dapm_widget_invalidate_output_paths(w);
2432 w->connected = status;
2440 * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful;
2441 * called from several API functions below
2443 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2444 const char *pin, int status)
2446 int ret = __snd_soc_dapm_set_pin(dapm, pin, status);
2448 return ret < 0 ? ret : 0;
2452 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2453 * @dapm: DAPM context
2455 * Walks all dapm audio paths and powers widgets according to their
2456 * stream or path usage.
2458 * Requires external locking.
2460 * Returns 0 for success.
2462 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2465 * Suppress early reports (eg, jacks syncing their state) to avoid
2466 * silly DAPM runs during card startup.
2468 if (!dapm->card || !dapm->card->instantiated)
2471 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2473 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2476 * snd_soc_dapm_sync - scan and power dapm paths
2477 * @dapm: DAPM context
2479 * Walks all dapm audio paths and powers widgets according to their
2480 * stream or path usage.
2482 * Returns 0 for success.
2484 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2488 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2489 ret = snd_soc_dapm_sync_unlocked(dapm);
2490 mutex_unlock(&dapm->card->dapm_mutex);
2493 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2496 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2497 * @w: The widget for which to update the flags
2499 * Some widgets have a dynamic category which depends on which neighbors they
2500 * are connected to. This function update the category for these widgets.
2502 * This function must be called whenever a path is added or removed to a widget.
2504 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2506 enum snd_soc_dapm_direction dir;
2507 struct snd_soc_dapm_path *p;
2511 case snd_soc_dapm_input:
2512 /* On a fully routed card an input is never a source */
2513 if (w->dapm->card->fully_routed)
2515 ep = SND_SOC_DAPM_EP_SOURCE;
2516 snd_soc_dapm_widget_for_each_source_path(w, p) {
2517 if (p->source->id == snd_soc_dapm_micbias ||
2518 p->source->id == snd_soc_dapm_mic ||
2519 p->source->id == snd_soc_dapm_line ||
2520 p->source->id == snd_soc_dapm_output) {
2526 case snd_soc_dapm_output:
2527 /* On a fully routed card a output is never a sink */
2528 if (w->dapm->card->fully_routed)
2530 ep = SND_SOC_DAPM_EP_SINK;
2531 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2532 if (p->sink->id == snd_soc_dapm_spk ||
2533 p->sink->id == snd_soc_dapm_hp ||
2534 p->sink->id == snd_soc_dapm_line ||
2535 p->sink->id == snd_soc_dapm_input) {
2541 case snd_soc_dapm_line:
2543 snd_soc_dapm_for_each_direction(dir) {
2544 if (!list_empty(&w->edges[dir]))
2545 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2555 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2556 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2557 const char *control)
2559 bool dynamic_source = false;
2560 bool dynamic_sink = false;
2565 switch (source->id) {
2566 case snd_soc_dapm_demux:
2567 dynamic_source = true;
2574 case snd_soc_dapm_mux:
2575 case snd_soc_dapm_switch:
2576 case snd_soc_dapm_mixer:
2577 case snd_soc_dapm_mixer_named_ctl:
2578 dynamic_sink = true;
2584 if (dynamic_source && dynamic_sink) {
2586 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2587 source->name, control, sink->name);
2589 } else if (!dynamic_source && !dynamic_sink) {
2591 "Control not supported for path %s -> [%s] -> %s\n",
2592 source->name, control, sink->name);
2599 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2600 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2601 const char *control,
2602 int (*connected)(struct snd_soc_dapm_widget *source,
2603 struct snd_soc_dapm_widget *sink))
2605 struct snd_soc_dapm_widget *widgets[2];
2606 enum snd_soc_dapm_direction dir;
2607 struct snd_soc_dapm_path *path;
2610 if (wsink->is_supply && !wsource->is_supply) {
2612 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2613 wsource->name, wsink->name);
2617 if (connected && !wsource->is_supply) {
2619 "connected() callback only supported for supply widgets (%s -> %s)\n",
2620 wsource->name, wsink->name);
2624 if (wsource->is_supply && control) {
2626 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2627 wsource->name, control, wsink->name);
2631 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2635 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2639 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2640 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2641 widgets[SND_SOC_DAPM_DIR_IN] = wsource;
2642 widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
2644 path->connected = connected;
2645 INIT_LIST_HEAD(&path->list);
2646 INIT_LIST_HEAD(&path->list_kcontrol);
2648 if (wsource->is_supply || wsink->is_supply)
2649 path->is_supply = 1;
2651 /* connect static paths */
2652 if (control == NULL) {
2655 switch (wsource->id) {
2656 case snd_soc_dapm_demux:
2657 ret = dapm_connect_mux(dapm, path, control, wsource);
2665 switch (wsink->id) {
2666 case snd_soc_dapm_mux:
2667 ret = dapm_connect_mux(dapm, path, control, wsink);
2671 case snd_soc_dapm_switch:
2672 case snd_soc_dapm_mixer:
2673 case snd_soc_dapm_mixer_named_ctl:
2674 ret = dapm_connect_mixer(dapm, path, control);
2683 list_add(&path->list, &dapm->card->paths);
2684 snd_soc_dapm_for_each_direction(dir)
2685 list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
2687 snd_soc_dapm_for_each_direction(dir) {
2688 dapm_update_widget_flags(widgets[dir]);
2689 dapm_mark_dirty(widgets[dir], "Route added");
2692 if (dapm->card->instantiated && path->connect)
2693 dapm_path_invalidate(path);
2701 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2702 const struct snd_soc_dapm_route *route)
2704 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2705 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2708 char prefixed_sink[80];
2709 char prefixed_source[80];
2713 prefix = soc_dapm_prefix(dapm);
2715 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2716 prefix, route->sink);
2717 sink = prefixed_sink;
2718 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2719 prefix, route->source);
2720 source = prefixed_source;
2723 source = route->source;
2726 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2727 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2729 if (wsink && wsource)
2733 * find src and dest widgets over all widgets but favor a widget from
2734 * current DAPM context
2736 list_for_each_entry(w, &dapm->card->widgets, list) {
2737 if (!wsink && !(strcmp(w->name, sink))) {
2739 if (w->dapm == dapm) {
2746 if (!wsource && !(strcmp(w->name, source))) {
2748 if (w->dapm == dapm) {
2755 /* use widget from another DAPM context if not found from this */
2761 if (wsource == NULL) {
2762 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2766 if (wsink == NULL) {
2767 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2773 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2774 dapm_wcache_update(&dapm->path_source_cache, wsource);
2776 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2783 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2784 source, route->control, sink);
2788 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2789 const struct snd_soc_dapm_route *route)
2791 struct snd_soc_dapm_widget *wsource, *wsink;
2792 struct snd_soc_dapm_path *path, *p;
2795 char prefixed_sink[80];
2796 char prefixed_source[80];
2799 if (route->control) {
2801 "ASoC: Removal of routes with controls not supported\n");
2805 prefix = soc_dapm_prefix(dapm);
2807 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2808 prefix, route->sink);
2809 sink = prefixed_sink;
2810 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2811 prefix, route->source);
2812 source = prefixed_source;
2815 source = route->source;
2819 list_for_each_entry(p, &dapm->card->paths, list) {
2820 if (strcmp(p->source->name, source) != 0)
2822 if (strcmp(p->sink->name, sink) != 0)
2829 wsource = path->source;
2832 dapm_mark_dirty(wsource, "Route removed");
2833 dapm_mark_dirty(wsink, "Route removed");
2835 dapm_path_invalidate(path);
2837 dapm_free_path(path);
2839 /* Update any path related flags */
2840 dapm_update_widget_flags(wsource);
2841 dapm_update_widget_flags(wsink);
2843 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2851 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2852 * @dapm: DAPM context
2853 * @route: audio routes
2854 * @num: number of routes
2856 * Connects 2 dapm widgets together via a named audio path. The sink is
2857 * the widget receiving the audio signal, whilst the source is the sender
2858 * of the audio signal.
2860 * Returns 0 for success else error. On error all resources can be freed
2861 * with a call to snd_soc_card_free().
2863 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2864 const struct snd_soc_dapm_route *route, int num)
2868 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2869 for (i = 0; i < num; i++) {
2870 r = snd_soc_dapm_add_route(dapm, route);
2872 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2874 route->control ? route->control : "direct",
2880 mutex_unlock(&dapm->card->dapm_mutex);
2884 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2887 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2888 * @dapm: DAPM context
2889 * @route: audio routes
2890 * @num: number of routes
2892 * Removes routes from the DAPM context.
2894 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2895 const struct snd_soc_dapm_route *route, int num)
2899 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2900 for (i = 0; i < num; i++) {
2901 snd_soc_dapm_del_route(dapm, route);
2904 mutex_unlock(&dapm->card->dapm_mutex);
2908 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2910 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2911 const struct snd_soc_dapm_route *route)
2913 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2916 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2919 struct snd_soc_dapm_path *path;
2923 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2929 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2934 if (route->control || route->connected)
2935 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2936 route->source, route->sink);
2938 snd_soc_dapm_widget_for_each_sink_path(source, path) {
2939 if (path->sink == sink) {
2946 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2947 route->source, route->sink);
2949 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2950 count, route->source, route->sink);
2956 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2957 * @dapm: DAPM context
2958 * @route: audio routes
2959 * @num: number of routes
2961 * Mark existing routes matching those specified in the passed array
2962 * as being weak, meaning that they are ignored for the purpose of
2963 * power decisions. The main intended use case is for sidetone paths
2964 * which couple audio between other independent paths if they are both
2965 * active in order to make the combination work better at the user
2966 * level but which aren't intended to be "used".
2968 * Note that CODEC drivers should not use this as sidetone type paths
2969 * can frequently also be used as bypass paths.
2971 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2972 const struct snd_soc_dapm_route *route, int num)
2977 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2978 for (i = 0; i < num; i++) {
2979 err = snd_soc_dapm_weak_route(dapm, route);
2984 mutex_unlock(&dapm->card->dapm_mutex);
2988 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2991 * snd_soc_dapm_new_widgets - add new dapm widgets
2992 * @card: card to be checked for new dapm widgets
2994 * Checks the codec for any new dapm widgets and creates them if found.
2996 * Returns 0 for success.
2998 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
3000 struct snd_soc_dapm_widget *w;
3003 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3005 list_for_each_entry(w, &card->widgets, list)
3010 if (w->num_kcontrols) {
3011 w->kcontrols = kzalloc(w->num_kcontrols *
3012 sizeof(struct snd_kcontrol *),
3014 if (!w->kcontrols) {
3015 mutex_unlock(&card->dapm_mutex);
3021 case snd_soc_dapm_switch:
3022 case snd_soc_dapm_mixer:
3023 case snd_soc_dapm_mixer_named_ctl:
3026 case snd_soc_dapm_mux:
3027 case snd_soc_dapm_demux:
3030 case snd_soc_dapm_pga:
3031 case snd_soc_dapm_out_drv:
3034 case snd_soc_dapm_dai_link:
3035 dapm_new_dai_link(w);
3041 /* Read the initial power state from the device */
3043 soc_dapm_read(w->dapm, w->reg, &val);
3044 val = val >> w->shift;
3046 if (val == w->on_val)
3052 dapm_mark_dirty(w, "new widget");
3053 dapm_debugfs_add_widget(w);
3056 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
3057 mutex_unlock(&card->dapm_mutex);
3060 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
3063 * snd_soc_dapm_get_volsw - dapm mixer get callback
3064 * @kcontrol: mixer control
3065 * @ucontrol: control element information
3067 * Callback to get the value of a dapm mixer control.
3069 * Returns 0 for success.
3071 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3072 struct snd_ctl_elem_value *ucontrol)
3074 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3075 struct snd_soc_card *card = dapm->card;
3076 struct soc_mixer_control *mc =
3077 (struct soc_mixer_control *)kcontrol->private_value;
3079 unsigned int shift = mc->shift;
3081 unsigned int mask = (1 << fls(max)) - 1;
3082 unsigned int invert = mc->invert;
3086 if (snd_soc_volsw_is_stereo(mc))
3088 "ASoC: Control '%s' is stereo, which is not supported\n",
3091 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3092 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3093 ret = soc_dapm_read(dapm, reg, &val);
3094 val = (val >> shift) & mask;
3096 val = dapm_kcontrol_get_value(kcontrol);
3098 mutex_unlock(&card->dapm_mutex);
3104 ucontrol->value.integer.value[0] = max - val;
3106 ucontrol->value.integer.value[0] = val;
3110 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3113 * snd_soc_dapm_put_volsw - dapm mixer set callback
3114 * @kcontrol: mixer control
3115 * @ucontrol: control element information
3117 * Callback to set the value of a dapm mixer control.
3119 * Returns 0 for success.
3121 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3122 struct snd_ctl_elem_value *ucontrol)
3124 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3125 struct snd_soc_card *card = dapm->card;
3126 struct soc_mixer_control *mc =
3127 (struct soc_mixer_control *)kcontrol->private_value;
3129 unsigned int shift = mc->shift;
3131 unsigned int mask = (1 << fls(max)) - 1;
3132 unsigned int invert = mc->invert;
3134 int connect, change, reg_change = 0;
3135 struct snd_soc_dapm_update update;
3138 if (snd_soc_volsw_is_stereo(mc))
3140 "ASoC: Control '%s' is stereo, which is not supported\n",
3143 val = (ucontrol->value.integer.value[0] & mask);
3149 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3151 change = dapm_kcontrol_set_value(kcontrol, val);
3153 if (reg != SND_SOC_NOPM) {
3154 mask = mask << shift;
3157 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3160 if (change || reg_change) {
3162 update.kcontrol = kcontrol;
3166 card->update = &update;
3169 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3171 card->update = NULL;
3174 mutex_unlock(&card->dapm_mutex);
3177 soc_dpcm_runtime_update(card);
3181 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3184 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3185 * @kcontrol: mixer control
3186 * @ucontrol: control element information
3188 * Callback to get the value of a dapm enumerated double mixer control.
3190 * Returns 0 for success.
3192 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3193 struct snd_ctl_elem_value *ucontrol)
3195 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3196 struct snd_soc_card *card = dapm->card;
3197 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3198 unsigned int reg_val, val;
3200 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3201 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3202 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3204 mutex_unlock(&card->dapm_mutex);
3208 reg_val = dapm_kcontrol_get_value(kcontrol);
3210 mutex_unlock(&card->dapm_mutex);
3212 val = (reg_val >> e->shift_l) & e->mask;
3213 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3214 if (e->shift_l != e->shift_r) {
3215 val = (reg_val >> e->shift_r) & e->mask;
3216 val = snd_soc_enum_val_to_item(e, val);
3217 ucontrol->value.enumerated.item[1] = val;
3222 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3225 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3226 * @kcontrol: mixer control
3227 * @ucontrol: control element information
3229 * Callback to set the value of a dapm enumerated double mixer control.
3231 * Returns 0 for success.
3233 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3234 struct snd_ctl_elem_value *ucontrol)
3236 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3237 struct snd_soc_card *card = dapm->card;
3238 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3239 unsigned int *item = ucontrol->value.enumerated.item;
3240 unsigned int val, change, reg_change = 0;
3242 struct snd_soc_dapm_update update;
3245 if (item[0] >= e->items)
3248 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3249 mask = e->mask << e->shift_l;
3250 if (e->shift_l != e->shift_r) {
3251 if (item[1] > e->items)
3253 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3254 mask |= e->mask << e->shift_r;
3257 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3259 change = dapm_kcontrol_set_value(kcontrol, val);
3261 if (e->reg != SND_SOC_NOPM)
3262 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3264 if (change || reg_change) {
3266 update.kcontrol = kcontrol;
3267 update.reg = e->reg;
3270 card->update = &update;
3273 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3275 card->update = NULL;
3278 mutex_unlock(&card->dapm_mutex);
3281 soc_dpcm_runtime_update(card);
3285 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3288 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3290 * @kcontrol: mixer control
3291 * @uinfo: control element information
3293 * Callback to provide information about a pin switch control.
3295 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3296 struct snd_ctl_elem_info *uinfo)
3298 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3300 uinfo->value.integer.min = 0;
3301 uinfo->value.integer.max = 1;
3305 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3308 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3310 * @kcontrol: mixer control
3313 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3314 struct snd_ctl_elem_value *ucontrol)
3316 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3317 const char *pin = (const char *)kcontrol->private_value;
3319 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3321 ucontrol->value.integer.value[0] =
3322 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3324 mutex_unlock(&card->dapm_mutex);
3328 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3331 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3333 * @kcontrol: mixer control
3336 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3337 struct snd_ctl_elem_value *ucontrol)
3339 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3340 const char *pin = (const char *)kcontrol->private_value;
3343 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3344 ret = __snd_soc_dapm_set_pin(&card->dapm, pin,
3345 !!ucontrol->value.integer.value[0]);
3346 mutex_unlock(&card->dapm_mutex);
3348 snd_soc_dapm_sync(&card->dapm);
3351 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3353 struct snd_soc_dapm_widget *
3354 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3355 const struct snd_soc_dapm_widget *widget)
3357 struct snd_soc_dapm_widget *w;
3359 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3360 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3361 /* Do not nag about probe deferrals */
3363 int ret = PTR_ERR(w);
3365 if (ret != -EPROBE_DEFER)
3367 "ASoC: Failed to create DAPM control %s (%d)\n",
3373 "ASoC: Failed to create DAPM control %s\n",
3377 mutex_unlock(&dapm->card->dapm_mutex);
3380 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
3382 struct snd_soc_dapm_widget *
3383 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3384 const struct snd_soc_dapm_widget *widget)
3386 enum snd_soc_dapm_direction dir;
3387 struct snd_soc_dapm_widget *w;
3391 if ((w = dapm_cnew_widget(widget)) == NULL)
3395 case snd_soc_dapm_regulator_supply:
3396 w->regulator = devm_regulator_get(dapm->dev, w->name);
3397 if (IS_ERR(w->regulator)) {
3398 ret = PTR_ERR(w->regulator);
3399 if (ret == -EPROBE_DEFER)
3400 return ERR_PTR(ret);
3401 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3406 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3407 ret = regulator_allow_bypass(w->regulator, true);
3409 dev_warn(w->dapm->dev,
3410 "ASoC: Failed to bypass %s: %d\n",
3414 case snd_soc_dapm_clock_supply:
3415 #ifdef CONFIG_CLKDEV_LOOKUP
3416 w->clk = devm_clk_get(dapm->dev, w->name);
3417 if (IS_ERR(w->clk)) {
3418 ret = PTR_ERR(w->clk);
3419 if (ret == -EPROBE_DEFER)
3420 return ERR_PTR(ret);
3421 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3433 prefix = soc_dapm_prefix(dapm);
3435 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3437 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3438 if (w->name == NULL) {
3444 case snd_soc_dapm_mic:
3445 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3446 w->power_check = dapm_generic_check_power;
3448 case snd_soc_dapm_input:
3449 if (!dapm->card->fully_routed)
3450 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3451 w->power_check = dapm_generic_check_power;
3453 case snd_soc_dapm_spk:
3454 case snd_soc_dapm_hp:
3455 w->is_ep = SND_SOC_DAPM_EP_SINK;
3456 w->power_check = dapm_generic_check_power;
3458 case snd_soc_dapm_output:
3459 if (!dapm->card->fully_routed)
3460 w->is_ep = SND_SOC_DAPM_EP_SINK;
3461 w->power_check = dapm_generic_check_power;
3463 case snd_soc_dapm_vmid:
3464 case snd_soc_dapm_siggen:
3465 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3466 w->power_check = dapm_always_on_check_power;
3468 case snd_soc_dapm_sink:
3469 w->is_ep = SND_SOC_DAPM_EP_SINK;
3470 w->power_check = dapm_always_on_check_power;
3473 case snd_soc_dapm_mux:
3474 case snd_soc_dapm_demux:
3475 case snd_soc_dapm_switch:
3476 case snd_soc_dapm_mixer:
3477 case snd_soc_dapm_mixer_named_ctl:
3478 case snd_soc_dapm_adc:
3479 case snd_soc_dapm_aif_out:
3480 case snd_soc_dapm_dac:
3481 case snd_soc_dapm_aif_in:
3482 case snd_soc_dapm_pga:
3483 case snd_soc_dapm_out_drv:
3484 case snd_soc_dapm_micbias:
3485 case snd_soc_dapm_line:
3486 case snd_soc_dapm_dai_link:
3487 case snd_soc_dapm_dai_out:
3488 case snd_soc_dapm_dai_in:
3489 w->power_check = dapm_generic_check_power;
3491 case snd_soc_dapm_supply:
3492 case snd_soc_dapm_regulator_supply:
3493 case snd_soc_dapm_clock_supply:
3494 case snd_soc_dapm_kcontrol:
3496 w->power_check = dapm_supply_check_power;
3499 w->power_check = dapm_always_on_check_power;
3504 INIT_LIST_HEAD(&w->list);
3505 INIT_LIST_HEAD(&w->dirty);
3506 list_add_tail(&w->list, &dapm->card->widgets);
3508 snd_soc_dapm_for_each_direction(dir) {
3509 INIT_LIST_HEAD(&w->edges[dir]);
3510 w->endpoints[dir] = -1;
3513 /* machine layer sets up unconnected pins and insertions */
3519 * snd_soc_dapm_new_controls - create new dapm controls
3520 * @dapm: DAPM context
3521 * @widget: widget array
3522 * @num: number of widgets
3524 * Creates new DAPM controls based upon the templates.
3526 * Returns 0 for success else error.
3528 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3529 const struct snd_soc_dapm_widget *widget,
3532 struct snd_soc_dapm_widget *w;
3536 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3537 for (i = 0; i < num; i++) {
3538 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3541 /* Do not nag about probe deferrals */
3542 if (ret == -EPROBE_DEFER)
3545 "ASoC: Failed to create DAPM control %s (%d)\n",
3551 "ASoC: Failed to create DAPM control %s\n",
3558 mutex_unlock(&dapm->card->dapm_mutex);
3561 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3563 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3564 struct snd_kcontrol *kcontrol, int event)
3566 struct snd_soc_dapm_path *source_p, *sink_p;
3567 struct snd_soc_dai *source, *sink;
3568 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3569 struct snd_pcm_substream substream;
3570 struct snd_pcm_hw_params *params = NULL;
3571 struct snd_pcm_runtime *runtime = NULL;
3575 if (WARN_ON(!config) ||
3576 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3577 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3580 /* We only support a single source and sink, pick the first */
3581 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
3582 struct snd_soc_dapm_path,
3583 list_node[SND_SOC_DAPM_DIR_OUT]);
3584 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
3585 struct snd_soc_dapm_path,
3586 list_node[SND_SOC_DAPM_DIR_IN]);
3588 source = source_p->source->priv;
3589 sink = sink_p->sink->priv;
3591 /* Be a little careful as we don't want to overflow the mask array */
3592 if (config->formats) {
3593 fmt = ffs(config->formats) - 1;
3595 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3600 /* Currently very limited parameter selection */
3601 params = kzalloc(sizeof(*params), GFP_KERNEL);
3606 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3608 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3610 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3613 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3614 = config->channels_min;
3615 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3616 = config->channels_max;
3618 memset(&substream, 0, sizeof(substream));
3620 /* Allocate a dummy snd_pcm_runtime for startup() and other ops() */
3621 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
3626 substream.runtime = runtime;
3629 case SND_SOC_DAPM_PRE_PMU:
3630 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3631 if (source->driver->ops && source->driver->ops->startup) {
3632 ret = source->driver->ops->startup(&substream, source);
3634 dev_err(source->dev,
3635 "ASoC: startup() failed: %d\n", ret);
3640 ret = soc_dai_hw_params(&substream, params, source);
3644 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3645 if (sink->driver->ops && sink->driver->ops->startup) {
3646 ret = sink->driver->ops->startup(&substream, sink);
3649 "ASoC: startup() failed: %d\n", ret);
3654 ret = soc_dai_hw_params(&substream, params, sink);
3659 case SND_SOC_DAPM_POST_PMU:
3660 ret = snd_soc_dai_digital_mute(sink, 0,
3661 SNDRV_PCM_STREAM_PLAYBACK);
3662 if (ret != 0 && ret != -ENOTSUPP)
3663 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3667 case SND_SOC_DAPM_PRE_PMD:
3668 ret = snd_soc_dai_digital_mute(sink, 1,
3669 SNDRV_PCM_STREAM_PLAYBACK);
3670 if (ret != 0 && ret != -ENOTSUPP)
3671 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3675 if (source->driver->ops && source->driver->ops->shutdown) {
3676 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3677 source->driver->ops->shutdown(&substream, source);
3681 if (sink->driver->ops && sink->driver->ops->shutdown) {
3682 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3683 sink->driver->ops->shutdown(&substream, sink);
3688 WARN(1, "Unknown event %d\n", event);
3698 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3699 struct snd_ctl_elem_value *ucontrol)
3701 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3703 ucontrol->value.enumerated.item[0] = w->params_select;
3708 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3709 struct snd_ctl_elem_value *ucontrol)
3711 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3713 /* Can't change the config when widget is already powered */
3717 if (ucontrol->value.enumerated.item[0] == w->params_select)
3720 if (ucontrol->value.enumerated.item[0] >= w->num_params)
3723 w->params_select = ucontrol->value.enumerated.item[0];
3728 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3729 const struct snd_soc_pcm_stream *params,
3730 unsigned int num_params,
3731 struct snd_soc_dapm_widget *source,
3732 struct snd_soc_dapm_widget *sink)
3734 struct snd_soc_dapm_widget template;
3735 struct snd_soc_dapm_widget *w;
3738 unsigned long private_value;
3739 const char **w_param_text;
3740 struct soc_enum w_param_enum[] = {
3741 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3743 struct snd_kcontrol_new kcontrol_dai_link[] = {
3744 SOC_ENUM_EXT(NULL, w_param_enum[0],
3745 snd_soc_dapm_dai_link_get,
3746 snd_soc_dapm_dai_link_put),
3748 const struct snd_soc_pcm_stream *config = params;
3750 w_param_text = devm_kcalloc(card->dev, num_params,
3751 sizeof(char *), GFP_KERNEL);
3755 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3756 source->name, sink->name);
3759 goto outfree_w_param;
3762 for (count = 0 ; count < num_params; count++) {
3763 if (!config->stream_name) {
3764 dev_warn(card->dapm.dev,
3765 "ASoC: anonymous config %d for dai link %s\n",
3767 w_param_text[count] =
3768 devm_kasprintf(card->dev, GFP_KERNEL,
3769 "Anonymous Configuration %d",
3771 if (!w_param_text[count]) {
3773 goto outfree_link_name;
3776 w_param_text[count] = devm_kmemdup(card->dev,
3777 config->stream_name,
3778 strlen(config->stream_name) + 1,
3780 if (!w_param_text[count]) {
3782 goto outfree_link_name;
3787 w_param_enum[0].items = num_params;
3788 w_param_enum[0].texts = w_param_text;
3790 memset(&template, 0, sizeof(template));
3791 template.reg = SND_SOC_NOPM;
3792 template.id = snd_soc_dapm_dai_link;
3793 template.name = link_name;
3794 template.event = snd_soc_dai_link_event;
3795 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3796 SND_SOC_DAPM_PRE_PMD;
3797 template.num_kcontrols = 1;
3798 /* duplicate w_param_enum on heap so that memory persists */
3800 (unsigned long) devm_kmemdup(card->dev,
3801 (void *)(kcontrol_dai_link[0].private_value),
3802 sizeof(struct soc_enum), GFP_KERNEL);
3803 if (!private_value) {
3804 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3807 goto outfree_link_name;
3809 kcontrol_dai_link[0].private_value = private_value;
3810 /* duplicate kcontrol_dai_link on heap so that memory persists */
3811 template.kcontrol_news =
3812 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3813 sizeof(struct snd_kcontrol_new),
3815 if (!template.kcontrol_news) {
3816 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3819 goto outfree_private_value;
3822 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3824 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3827 /* Do not nag about probe deferrals */
3828 if (ret != -EPROBE_DEFER)
3830 "ASoC: Failed to create %s widget (%d)\n",
3832 goto outfree_kcontrol_news;
3835 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3838 goto outfree_kcontrol_news;
3842 w->num_params = num_params;
3844 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3847 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3850 devm_kfree(card->dev, w);
3851 outfree_kcontrol_news:
3852 devm_kfree(card->dev, (void *)template.kcontrol_news);
3853 outfree_private_value:
3854 devm_kfree(card->dev, (void *)private_value);
3856 devm_kfree(card->dev, link_name);
3858 for (count = 0 ; count < num_params; count++)
3859 devm_kfree(card->dev, (void *)w_param_text[count]);
3860 devm_kfree(card->dev, w_param_text);
3865 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3866 struct snd_soc_dai *dai)
3868 struct snd_soc_dapm_widget template;
3869 struct snd_soc_dapm_widget *w;
3871 WARN_ON(dapm->dev != dai->dev);
3873 memset(&template, 0, sizeof(template));
3874 template.reg = SND_SOC_NOPM;
3876 if (dai->driver->playback.stream_name) {
3877 template.id = snd_soc_dapm_dai_in;
3878 template.name = dai->driver->playback.stream_name;
3879 template.sname = dai->driver->playback.stream_name;
3881 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3884 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3886 int ret = PTR_ERR(w);
3888 /* Do not nag about probe deferrals */
3889 if (ret != -EPROBE_DEFER)
3891 "ASoC: Failed to create %s widget (%d)\n",
3892 dai->driver->playback.stream_name, ret);
3896 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3897 dai->driver->playback.stream_name);
3902 dai->playback_widget = w;
3905 if (dai->driver->capture.stream_name) {
3906 template.id = snd_soc_dapm_dai_out;
3907 template.name = dai->driver->capture.stream_name;
3908 template.sname = dai->driver->capture.stream_name;
3910 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3913 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3915 int ret = PTR_ERR(w);
3917 /* Do not nag about probe deferrals */
3918 if (ret != -EPROBE_DEFER)
3920 "ASoC: Failed to create %s widget (%d)\n",
3921 dai->driver->playback.stream_name, ret);
3925 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3926 dai->driver->capture.stream_name);
3931 dai->capture_widget = w;
3937 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3939 struct snd_soc_dapm_widget *dai_w, *w;
3940 struct snd_soc_dapm_widget *src, *sink;
3941 struct snd_soc_dai *dai;
3943 /* For each DAI widget... */
3944 list_for_each_entry(dai_w, &card->widgets, list) {
3945 switch (dai_w->id) {
3946 case snd_soc_dapm_dai_in:
3947 case snd_soc_dapm_dai_out:
3953 /* let users know there is no DAI to link */
3955 dev_dbg(card->dev, "dai widget %s has no DAI\n",
3962 /* ...find all widgets with the same stream and link them */
3963 list_for_each_entry(w, &card->widgets, list) {
3964 if (w->dapm != dai_w->dapm)
3968 case snd_soc_dapm_dai_in:
3969 case snd_soc_dapm_dai_out:
3975 if (!w->sname || !strstr(w->sname, dai_w->sname))
3978 if (dai_w->id == snd_soc_dapm_dai_in) {
3985 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3986 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3993 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3994 struct snd_soc_pcm_runtime *rtd)
3996 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3997 struct snd_soc_dapm_widget *sink, *source;
4000 for (i = 0; i < rtd->num_codecs; i++) {
4001 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
4003 /* connect BE DAI playback if widgets are valid */
4004 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
4005 source = cpu_dai->playback_widget;
4006 sink = codec_dai->playback_widget;
4007 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
4008 cpu_dai->component->name, source->name,
4009 codec_dai->component->name, sink->name);
4011 snd_soc_dapm_add_path(&card->dapm, source, sink,
4015 /* connect BE DAI capture if widgets are valid */
4016 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
4017 source = codec_dai->capture_widget;
4018 sink = cpu_dai->capture_widget;
4019 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
4020 codec_dai->component->name, source->name,
4021 cpu_dai->component->name, sink->name);
4023 snd_soc_dapm_add_path(&card->dapm, source, sink,
4029 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
4032 struct snd_soc_dapm_widget *w;
4035 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
4036 w = dai->playback_widget;
4038 w = dai->capture_widget;
4041 dapm_mark_dirty(w, "stream event");
4043 if (w->id == snd_soc_dapm_dai_in) {
4044 ep = SND_SOC_DAPM_EP_SOURCE;
4045 dapm_widget_invalidate_input_paths(w);
4047 ep = SND_SOC_DAPM_EP_SINK;
4048 dapm_widget_invalidate_output_paths(w);
4052 case SND_SOC_DAPM_STREAM_START:
4056 case SND_SOC_DAPM_STREAM_STOP:
4060 case SND_SOC_DAPM_STREAM_SUSPEND:
4061 case SND_SOC_DAPM_STREAM_RESUME:
4062 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
4063 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
4069 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
4071 struct snd_soc_pcm_runtime *rtd;
4073 /* for each BE DAI link... */
4074 list_for_each_entry(rtd, &card->rtd_list, list) {
4076 * dynamic FE links have no fixed DAI mapping.
4077 * CODEC<->CODEC links have no direct connection.
4079 if (rtd->dai_link->dynamic || rtd->dai_link->params)
4082 dapm_connect_dai_link_widgets(card, rtd);
4086 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4091 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
4092 for (i = 0; i < rtd->num_codecs; i++)
4093 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
4095 dapm_power_widgets(rtd->card, event);
4099 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4100 * @rtd: PCM runtime data
4101 * @stream: stream name
4102 * @event: stream event
4104 * Sends a stream event to the dapm core. The core then makes any
4105 * necessary widget power changes.
4107 * Returns 0 for success else error.
4109 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4112 struct snd_soc_card *card = rtd->card;
4114 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4115 soc_dapm_stream_event(rtd, stream, event);
4116 mutex_unlock(&card->dapm_mutex);
4120 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4121 * @dapm: DAPM context
4124 * Enables input/output pin and its parents or children widgets iff there is
4125 * a valid audio route and active audio stream.
4127 * Requires external locking.
4129 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4130 * do any widget power switching.
4132 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4135 return snd_soc_dapm_set_pin(dapm, pin, 1);
4137 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4140 * snd_soc_dapm_enable_pin - enable pin.
4141 * @dapm: DAPM context
4144 * Enables input/output pin and its parents or children widgets iff there is
4145 * a valid audio route and active audio stream.
4147 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4148 * do any widget power switching.
4150 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4154 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4156 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4158 mutex_unlock(&dapm->card->dapm_mutex);
4162 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4165 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4166 * @dapm: DAPM context
4169 * Enables input/output pin regardless of any other state. This is
4170 * intended for use with microphone bias supplies used in microphone
4173 * Requires external locking.
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_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4181 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4184 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4188 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4189 if (!w->connected) {
4191 * w->force does not affect the number of input or output paths,
4192 * so we only have to recheck if w->connected is changed
4194 dapm_widget_invalidate_input_paths(w);
4195 dapm_widget_invalidate_output_paths(w);
4199 dapm_mark_dirty(w, "force enable");
4203 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4206 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4207 * @dapm: DAPM context
4210 * Enables input/output pin regardless of any other state. This is
4211 * intended for use with microphone bias supplies used in microphone
4214 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4215 * do any widget power switching.
4217 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4222 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4224 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4226 mutex_unlock(&dapm->card->dapm_mutex);
4230 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4233 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4234 * @dapm: DAPM context
4237 * Disables input/output pin and its parents or children widgets.
4239 * Requires external locking.
4241 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4242 * do any widget power switching.
4244 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4247 return snd_soc_dapm_set_pin(dapm, pin, 0);
4249 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4252 * snd_soc_dapm_disable_pin - disable pin.
4253 * @dapm: DAPM context
4256 * Disables input/output pin and its parents or children widgets.
4258 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4259 * do any widget power switching.
4261 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4266 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4268 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4270 mutex_unlock(&dapm->card->dapm_mutex);
4274 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4277 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4278 * @dapm: DAPM context
4281 * Marks the specified pin as being not connected, disabling it along
4282 * any parent or child widgets. At present this is identical to
4283 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4284 * additional things such as disabling controls which only affect
4285 * paths through the pin.
4287 * Requires external locking.
4289 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4290 * do any widget power switching.
4292 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4295 return snd_soc_dapm_set_pin(dapm, pin, 0);
4297 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4300 * snd_soc_dapm_nc_pin - permanently disable pin.
4301 * @dapm: DAPM context
4304 * Marks the specified pin as being not connected, disabling it along
4305 * any parent or child widgets. At present this is identical to
4306 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4307 * additional things such as disabling controls which only affect
4308 * paths through the pin.
4310 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4311 * do any widget power switching.
4313 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4317 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4319 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4321 mutex_unlock(&dapm->card->dapm_mutex);
4325 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4328 * snd_soc_dapm_get_pin_status - get audio pin status
4329 * @dapm: DAPM context
4330 * @pin: audio signal pin endpoint (or start point)
4332 * Get audio pin status - connected or disconnected.
4334 * Returns 1 for connected otherwise 0.
4336 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4339 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4342 return w->connected;
4346 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4349 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4350 * @dapm: DAPM context
4351 * @pin: audio signal pin endpoint (or start point)
4353 * Mark the given endpoint or pin as ignoring suspend. When the
4354 * system is disabled a path between two endpoints flagged as ignoring
4355 * suspend will not be disabled. The path must already be enabled via
4356 * normal means at suspend time, it will not be turned on if it was not
4359 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4362 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4365 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4369 w->ignore_suspend = 1;
4373 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4376 * snd_soc_dapm_free - free dapm resources
4377 * @dapm: DAPM context
4379 * Free all dapm widgets and resources.
4381 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4383 dapm_debugfs_cleanup(dapm);
4384 dapm_free_widgets(dapm);
4385 list_del(&dapm->list);
4387 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4389 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4391 struct snd_soc_card *card = dapm->card;
4392 struct snd_soc_dapm_widget *w;
4393 LIST_HEAD(down_list);
4396 mutex_lock(&card->dapm_mutex);
4398 list_for_each_entry(w, &dapm->card->widgets, list) {
4399 if (w->dapm != dapm)
4402 dapm_seq_insert(w, &down_list, false);
4408 /* If there were no widgets to power down we're already in
4412 if (dapm->bias_level == SND_SOC_BIAS_ON)
4413 snd_soc_dapm_set_bias_level(dapm,
4414 SND_SOC_BIAS_PREPARE);
4415 dapm_seq_run(card, &down_list, 0, false);
4416 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4417 snd_soc_dapm_set_bias_level(dapm,
4418 SND_SOC_BIAS_STANDBY);
4421 mutex_unlock(&card->dapm_mutex);
4425 * snd_soc_dapm_shutdown - callback for system shutdown
4427 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4429 struct snd_soc_dapm_context *dapm;
4431 list_for_each_entry(dapm, &card->dapm_list, list) {
4432 if (dapm != &card->dapm) {
4433 soc_dapm_shutdown_dapm(dapm);
4434 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4435 snd_soc_dapm_set_bias_level(dapm,
4440 soc_dapm_shutdown_dapm(&card->dapm);
4441 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4442 snd_soc_dapm_set_bias_level(&card->dapm,
4446 /* Module information */
4447 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4448 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4449 MODULE_LICENSE("GPL");