2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
46 #include <trace/events/asoc.h>
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
50 #define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
51 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
53 #define snd_soc_dapm_for_each_direction(dir) \
54 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
57 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
58 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
60 int (*connected)(struct snd_soc_dapm_widget *source,
61 struct snd_soc_dapm_widget *sink));
63 struct snd_soc_dapm_widget *
64 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
65 const struct snd_soc_dapm_widget *widget);
67 struct snd_soc_dapm_widget *
68 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
69 const struct snd_soc_dapm_widget *widget);
71 /* dapm power sequences - make this per codec in the future */
72 static int dapm_up_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_regulator_supply] = 1,
75 [snd_soc_dapm_clock_supply] = 1,
76 [snd_soc_dapm_supply] = 2,
77 [snd_soc_dapm_micbias] = 3,
78 [snd_soc_dapm_dai_link] = 2,
79 [snd_soc_dapm_dai_in] = 4,
80 [snd_soc_dapm_dai_out] = 4,
81 [snd_soc_dapm_aif_in] = 4,
82 [snd_soc_dapm_aif_out] = 4,
83 [snd_soc_dapm_mic] = 5,
84 [snd_soc_dapm_mux] = 6,
85 [snd_soc_dapm_demux] = 6,
86 [snd_soc_dapm_dac] = 7,
87 [snd_soc_dapm_switch] = 8,
88 [snd_soc_dapm_mixer] = 8,
89 [snd_soc_dapm_mixer_named_ctl] = 8,
90 [snd_soc_dapm_pga] = 9,
91 [snd_soc_dapm_adc] = 10,
92 [snd_soc_dapm_out_drv] = 11,
93 [snd_soc_dapm_hp] = 11,
94 [snd_soc_dapm_spk] = 11,
95 [snd_soc_dapm_line] = 11,
96 [snd_soc_dapm_kcontrol] = 12,
97 [snd_soc_dapm_post] = 13,
100 static int dapm_down_seq[] = {
101 [snd_soc_dapm_pre] = 0,
102 [snd_soc_dapm_kcontrol] = 1,
103 [snd_soc_dapm_adc] = 2,
104 [snd_soc_dapm_hp] = 3,
105 [snd_soc_dapm_spk] = 3,
106 [snd_soc_dapm_line] = 3,
107 [snd_soc_dapm_out_drv] = 3,
108 [snd_soc_dapm_pga] = 4,
109 [snd_soc_dapm_switch] = 5,
110 [snd_soc_dapm_mixer_named_ctl] = 5,
111 [snd_soc_dapm_mixer] = 5,
112 [snd_soc_dapm_dac] = 6,
113 [snd_soc_dapm_mic] = 7,
114 [snd_soc_dapm_micbias] = 8,
115 [snd_soc_dapm_mux] = 9,
116 [snd_soc_dapm_demux] = 9,
117 [snd_soc_dapm_aif_in] = 10,
118 [snd_soc_dapm_aif_out] = 10,
119 [snd_soc_dapm_dai_in] = 10,
120 [snd_soc_dapm_dai_out] = 10,
121 [snd_soc_dapm_dai_link] = 11,
122 [snd_soc_dapm_supply] = 12,
123 [snd_soc_dapm_clock_supply] = 13,
124 [snd_soc_dapm_regulator_supply] = 13,
125 [snd_soc_dapm_post] = 14,
128 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
130 if (dapm->card && dapm->card->instantiated)
131 lockdep_assert_held(&dapm->card->dapm_mutex);
134 static void pop_wait(u32 pop_time)
137 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
140 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
148 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
153 vsnprintf(buf, PAGE_SIZE, fmt, args);
154 dev_info(dev, "%s", buf);
160 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
162 return !list_empty(&w->dirty);
165 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
167 dapm_assert_locked(w->dapm);
169 if (!dapm_dirty_widget(w)) {
170 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
172 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
177 * Common implementation for dapm_widget_invalidate_input_paths() and
178 * dapm_widget_invalidate_output_paths(). The function is inlined since the
179 * combined size of the two specialized functions is only marginally larger then
180 * the size of the generic function and at the same time the fast path of the
181 * specialized functions is significantly smaller than the generic function.
183 static __always_inline void dapm_widget_invalidate_paths(
184 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
186 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
187 struct snd_soc_dapm_widget *node;
188 struct snd_soc_dapm_path *p;
191 dapm_assert_locked(w->dapm);
193 if (w->endpoints[dir] == -1)
196 list_add_tail(&w->work_list, &list);
197 w->endpoints[dir] = -1;
199 list_for_each_entry(w, &list, work_list) {
200 snd_soc_dapm_widget_for_each_path(w, dir, p) {
201 if (p->is_supply || p->weak || !p->connect)
203 node = p->node[rdir];
204 if (node->endpoints[dir] != -1) {
205 node->endpoints[dir] = -1;
206 list_add_tail(&node->work_list, &list);
213 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
215 * @w: The widget for which to invalidate the cached number of input paths
217 * Resets the cached number of inputs for the specified widget and all widgets
218 * that can be reached via outcoming paths from the widget.
220 * This function must be called if the number of output paths for a widget might
221 * have changed. E.g. if the source state of a widget changes or a path is added
222 * or activated with the widget as the sink.
224 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
226 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
230 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
232 * @w: The widget for which to invalidate the cached number of output paths
234 * Resets the cached number of outputs for the specified widget and all widgets
235 * that can be reached via incoming paths from the widget.
237 * This function must be called if the number of output paths for a widget might
238 * have changed. E.g. if the sink state of a widget changes or a path is added
239 * or activated with the widget as the source.
241 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
243 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
247 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
248 * for the widgets connected to a path
249 * @p: The path to invalidate
251 * Resets the cached number of inputs for the sink of the path and the cached
252 * number of outputs for the source of the path.
254 * This function must be called when a path is added, removed or the connected
257 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
260 * Weak paths or supply paths do not influence the number of input or
261 * output paths of their neighbors.
263 if (p->weak || p->is_supply)
267 * The number of connected endpoints is the sum of the number of
268 * connected endpoints of all neighbors. If a node with 0 connected
269 * endpoints is either connected or disconnected that sum won't change,
270 * so there is no need to re-check the path.
272 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
273 dapm_widget_invalidate_input_paths(p->sink);
274 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
275 dapm_widget_invalidate_output_paths(p->source);
278 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
280 struct snd_soc_dapm_widget *w;
282 mutex_lock(&card->dapm_mutex);
284 list_for_each_entry(w, &card->widgets, list) {
286 dapm_mark_dirty(w, "Rechecking endpoints");
287 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
288 dapm_widget_invalidate_output_paths(w);
289 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
290 dapm_widget_invalidate_input_paths(w);
294 mutex_unlock(&card->dapm_mutex);
296 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
298 /* create a new dapm widget */
299 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
300 const struct snd_soc_dapm_widget *_widget)
302 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
305 struct dapm_kcontrol_data {
307 struct snd_soc_dapm_widget *widget;
308 struct list_head paths;
309 struct snd_soc_dapm_widget_list *wlist;
312 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
313 struct snd_kcontrol *kcontrol)
315 struct dapm_kcontrol_data *data;
316 struct soc_mixer_control *mc;
321 data = kzalloc(sizeof(*data), GFP_KERNEL);
325 INIT_LIST_HEAD(&data->paths);
327 switch (widget->id) {
328 case snd_soc_dapm_switch:
329 case snd_soc_dapm_mixer:
330 case snd_soc_dapm_mixer_named_ctl:
331 mc = (struct soc_mixer_control *)kcontrol->private_value;
333 if (mc->autodisable) {
334 struct snd_soc_dapm_widget template;
336 name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name,
343 memset(&template, 0, sizeof(template));
344 template.reg = mc->reg;
345 template.mask = (1 << fls(mc->max)) - 1;
346 template.shift = mc->shift;
348 template.off_val = mc->max;
350 template.off_val = 0;
351 template.on_val = template.off_val;
352 template.id = snd_soc_dapm_kcontrol;
353 template.name = name;
355 data->value = template.on_val;
358 snd_soc_dapm_new_control_unlocked(widget->dapm,
367 case snd_soc_dapm_demux:
368 case snd_soc_dapm_mux:
369 e = (struct soc_enum *)kcontrol->private_value;
371 if (e->autodisable) {
372 struct snd_soc_dapm_widget template;
374 name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name,
381 memset(&template, 0, sizeof(template));
382 template.reg = e->reg;
383 template.mask = e->mask << e->shift_l;
384 template.shift = e->shift_l;
385 template.off_val = snd_soc_enum_item_to_val(e, 0);
386 template.on_val = template.off_val;
387 template.id = snd_soc_dapm_kcontrol;
388 template.name = name;
390 data->value = template.on_val;
392 data->widget = snd_soc_dapm_new_control_unlocked(
393 widget->dapm, &template);
400 snd_soc_dapm_add_path(widget->dapm, data->widget,
408 kcontrol->private_data = data;
417 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
419 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
424 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
425 const struct snd_kcontrol *kcontrol)
427 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
432 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
433 struct snd_soc_dapm_widget *widget)
435 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
436 struct snd_soc_dapm_widget_list *new_wlist;
440 n = data->wlist->num_widgets + 1;
444 new_wlist = krealloc(data->wlist,
445 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
449 new_wlist->widgets[n - 1] = widget;
450 new_wlist->num_widgets = n;
452 data->wlist = new_wlist;
457 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
458 struct snd_soc_dapm_path *path)
460 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
462 list_add_tail(&path->list_kcontrol, &data->paths);
465 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
467 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
472 return data->widget->power;
475 static struct list_head *dapm_kcontrol_get_path_list(
476 const struct snd_kcontrol *kcontrol)
478 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
483 #define dapm_kcontrol_for_each_path(path, kcontrol) \
484 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
487 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
489 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
495 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
498 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
500 if (data->value == value)
504 data->widget->on_val = value;
512 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
514 * @kcontrol: The kcontrol
516 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
517 struct snd_kcontrol *kcontrol)
519 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
521 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
524 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
526 * @kcontrol: The kcontrol
528 * Note: This function must only be used on kcontrols that are known to have
529 * been registered for a CODEC. Otherwise the behaviour is undefined.
531 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
532 struct snd_kcontrol *kcontrol)
534 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
536 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
538 static void dapm_reset(struct snd_soc_card *card)
540 struct snd_soc_dapm_widget *w;
542 lockdep_assert_held(&card->dapm_mutex);
544 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
546 list_for_each_entry(w, &card->widgets, list) {
547 w->new_power = w->power;
548 w->power_checked = false;
552 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
554 if (!dapm->component)
556 return dapm->component->name_prefix;
559 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
562 if (!dapm->component)
564 return snd_soc_component_read(dapm->component, reg, value);
567 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
568 int reg, unsigned int mask, unsigned int value)
570 if (!dapm->component)
572 return snd_soc_component_update_bits(dapm->component, reg,
576 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
577 int reg, unsigned int mask, unsigned int value)
579 if (!dapm->component)
581 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
584 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
587 snd_soc_component_async_complete(dapm->component);
590 static struct snd_soc_dapm_widget *
591 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
593 struct snd_soc_dapm_widget *w = wcache->widget;
594 struct list_head *wlist;
599 wlist = &w->dapm->card->widgets;
601 list_for_each_entry_from(w, wlist, list) {
602 if (!strcmp(name, w->name))
613 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
614 struct snd_soc_dapm_widget *w)
620 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
621 * @dapm: The DAPM context for which to set the level
622 * @level: The level to set
624 * Forces the DAPM bias level to a specific state. It will call the bias level
625 * callback of DAPM context with the specified level. This will even happen if
626 * the context is already at the same level. Furthermore it will not go through
627 * the normal bias level sequencing, meaning any intermediate states between the
628 * current and the target state will not be entered.
630 * Note that the change in bias level is only temporary and the next time
631 * snd_soc_dapm_sync() is called the state will be set to the level as
632 * determined by the DAPM core. The function is mainly intended to be used to
633 * used during probe or resume from suspend to power up the device so
634 * initialization can be done, before the DAPM core takes over.
636 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
637 enum snd_soc_bias_level level)
641 if (dapm->set_bias_level)
642 ret = dapm->set_bias_level(dapm, level);
645 dapm->bias_level = level;
649 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
652 * snd_soc_dapm_set_bias_level - set the bias level for the system
653 * @dapm: DAPM context
654 * @level: level to configure
656 * Configure the bias (power) levels for the SoC audio device.
658 * Returns 0 for success else error.
660 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
661 enum snd_soc_bias_level level)
663 struct snd_soc_card *card = dapm->card;
666 trace_snd_soc_bias_level_start(card, level);
668 if (card && card->set_bias_level)
669 ret = card->set_bias_level(card, dapm, level);
673 if (!card || dapm != &card->dapm)
674 ret = snd_soc_dapm_force_bias_level(dapm, level);
679 if (card && card->set_bias_level_post)
680 ret = card->set_bias_level_post(card, dapm, level);
682 trace_snd_soc_bias_level_done(card, level);
687 /* connect mux widget to its interconnecting audio paths */
688 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
689 struct snd_soc_dapm_path *path, const char *control_name,
690 struct snd_soc_dapm_widget *w)
692 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
693 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
694 unsigned int val, item;
697 if (e->reg != SND_SOC_NOPM) {
698 soc_dapm_read(dapm, e->reg, &val);
699 val = (val >> e->shift_l) & e->mask;
700 item = snd_soc_enum_val_to_item(e, val);
702 /* since a virtual mux has no backing registers to
703 * decide which path to connect, it will try to match
704 * with the first enumeration. This is to ensure
705 * that the default mux choice (the first) will be
706 * correctly powered up during initialization.
711 for (i = 0; i < e->items; i++) {
712 if (!(strcmp(control_name, e->texts[i]))) {
713 path->name = e->texts[i];
725 /* set up initial codec paths */
726 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
728 struct soc_mixer_control *mc = (struct soc_mixer_control *)
729 p->sink->kcontrol_news[i].private_value;
730 unsigned int reg = mc->reg;
731 unsigned int shift = mc->shift;
732 unsigned int max = mc->max;
733 unsigned int mask = (1 << fls(max)) - 1;
734 unsigned int invert = mc->invert;
737 if (reg != SND_SOC_NOPM) {
738 soc_dapm_read(p->sink->dapm, reg, &val);
739 val = (val >> shift) & mask;
748 /* connect mixer widget to its interconnecting audio paths */
749 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
750 struct snd_soc_dapm_path *path, const char *control_name)
754 /* search for mixer kcontrol */
755 for (i = 0; i < path->sink->num_kcontrols; i++) {
756 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
757 path->name = path->sink->kcontrol_news[i].name;
758 dapm_set_mixer_path_status(path, i);
765 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
766 struct snd_soc_dapm_widget *kcontrolw,
767 const struct snd_kcontrol_new *kcontrol_new,
768 struct snd_kcontrol **kcontrol)
770 struct snd_soc_dapm_widget *w;
775 list_for_each_entry(w, &dapm->card->widgets, list) {
776 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
778 for (i = 0; i < w->num_kcontrols; i++) {
779 if (&w->kcontrol_news[i] == kcontrol_new) {
781 *kcontrol = w->kcontrols[i];
791 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
792 * create it. Either way, add the widget into the control's widget list
794 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
797 struct snd_soc_dapm_context *dapm = w->dapm;
798 struct snd_card *card = dapm->card->snd_card;
802 struct snd_kcontrol *kcontrol;
803 bool wname_in_long_name, kcname_in_long_name;
804 char *long_name = NULL;
808 prefix = soc_dapm_prefix(dapm);
810 prefix_len = strlen(prefix) + 1;
814 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
819 wname_in_long_name = false;
820 kcname_in_long_name = true;
823 case snd_soc_dapm_switch:
824 case snd_soc_dapm_mixer:
825 case snd_soc_dapm_pga:
826 case snd_soc_dapm_out_drv:
827 wname_in_long_name = true;
828 kcname_in_long_name = true;
830 case snd_soc_dapm_mixer_named_ctl:
831 wname_in_long_name = false;
832 kcname_in_long_name = true;
834 case snd_soc_dapm_demux:
835 case snd_soc_dapm_mux:
836 wname_in_long_name = true;
837 kcname_in_long_name = false;
844 if (wname_in_long_name && kcname_in_long_name) {
846 * The control will get a prefix from the control
847 * creation process but we're also using the same
848 * prefix for widgets so cut the prefix off the
849 * front of the widget name.
851 long_name = kasprintf(GFP_KERNEL, "%s %s",
852 w->name + prefix_len,
853 w->kcontrol_news[kci].name);
854 if (long_name == NULL)
858 } else if (wname_in_long_name) {
860 name = w->name + prefix_len;
863 name = w->kcontrol_news[kci].name;
866 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
873 kcontrol->private_free = dapm_kcontrol_free;
875 ret = dapm_kcontrol_data_alloc(w, kcontrol);
877 snd_ctl_free_one(kcontrol);
881 ret = snd_ctl_add(card, kcontrol);
884 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
890 ret = dapm_kcontrol_add_widget(kcontrol, w);
892 w->kcontrols[kci] = kcontrol;
900 /* create new dapm mixer control */
901 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
904 struct snd_soc_dapm_path *path;
905 struct dapm_kcontrol_data *data;
908 for (i = 0; i < w->num_kcontrols; i++) {
910 snd_soc_dapm_widget_for_each_source_path(w, path) {
911 /* mixer/mux paths name must match control name */
912 if (path->name != (char *)w->kcontrol_news[i].name)
915 if (!w->kcontrols[i]) {
916 ret = dapm_create_or_share_kcontrol(w, i);
921 dapm_kcontrol_add_path(w->kcontrols[i], path);
923 data = snd_kcontrol_chip(w->kcontrols[i]);
925 snd_soc_dapm_add_path(data->widget->dapm,
935 /* create new dapm mux control */
936 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
938 struct snd_soc_dapm_context *dapm = w->dapm;
939 enum snd_soc_dapm_direction dir;
940 struct snd_soc_dapm_path *path;
945 case snd_soc_dapm_mux:
946 dir = SND_SOC_DAPM_DIR_OUT;
949 case snd_soc_dapm_demux:
950 dir = SND_SOC_DAPM_DIR_IN;
957 if (w->num_kcontrols != 1) {
959 "ASoC: %s %s has incorrect number of controls\n", type,
964 if (list_empty(&w->edges[dir])) {
965 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
969 ret = dapm_create_or_share_kcontrol(w, 0);
973 snd_soc_dapm_widget_for_each_path(w, dir, path) {
975 dapm_kcontrol_add_path(w->kcontrols[0], path);
981 /* create new dapm volume control */
982 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
986 for (i = 0; i < w->num_kcontrols; i++) {
987 ret = dapm_create_or_share_kcontrol(w, i);
995 /* create new dapm dai link control */
996 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
999 struct snd_kcontrol *kcontrol;
1000 struct snd_soc_dapm_context *dapm = w->dapm;
1001 struct snd_card *card = dapm->card->snd_card;
1003 /* create control for links with > 1 config */
1004 if (w->num_params <= 1)
1008 for (i = 0; i < w->num_kcontrols; i++) {
1009 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1011 ret = snd_ctl_add(card, kcontrol);
1014 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1015 w->name, w->kcontrol_news[i].name, ret);
1018 kcontrol->private_data = w;
1019 w->kcontrols[i] = kcontrol;
1025 /* We implement power down on suspend by checking the power state of
1026 * the ALSA card - when we are suspending the ALSA state for the card
1029 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1031 int level = snd_power_get_state(widget->dapm->card->snd_card);
1034 case SNDRV_CTL_POWER_D3hot:
1035 case SNDRV_CTL_POWER_D3cold:
1036 if (widget->ignore_suspend)
1037 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1039 return widget->ignore_suspend;
1045 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1046 struct list_head *widgets)
1048 struct snd_soc_dapm_widget *w;
1049 struct list_head *it;
1050 unsigned int size = 0;
1053 list_for_each(it, widgets)
1056 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1060 list_for_each_entry(w, widgets, work_list)
1061 (*list)->widgets[i++] = w;
1063 (*list)->num_widgets = i;
1069 * Common implementation for is_connected_output_ep() and
1070 * is_connected_input_ep(). The function is inlined since the combined size of
1071 * the two specialized functions is only marginally larger then the size of the
1072 * generic function and at the same time the fast path of the specialized
1073 * functions is significantly smaller than the generic function.
1075 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1076 struct list_head *list, enum snd_soc_dapm_direction dir,
1077 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *))
1079 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1080 struct snd_soc_dapm_path *path;
1083 if (widget->endpoints[dir] >= 0)
1084 return widget->endpoints[dir];
1086 DAPM_UPDATE_STAT(widget, path_checks);
1088 /* do we need to add this widget to the list ? */
1090 list_add_tail(&widget->work_list, list);
1092 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1093 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1094 return widget->endpoints[dir];
1097 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1098 DAPM_UPDATE_STAT(widget, neighbour_checks);
1100 if (path->weak || path->is_supply)
1106 trace_snd_soc_dapm_path(widget, dir, path);
1108 if (path->connect) {
1110 con += fn(path->node[dir], list);
1115 widget->endpoints[dir] = con;
1121 * Recursively check for a completed path to an active or physically connected
1122 * output widget. Returns number of complete paths.
1124 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1125 struct list_head *list)
1127 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1128 is_connected_output_ep);
1132 * Recursively check for a completed path to an active or physically connected
1133 * input widget. Returns number of complete paths.
1135 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1136 struct list_head *list)
1138 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1139 is_connected_input_ep);
1143 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1144 * @dai: the soc DAI.
1145 * @stream: stream direction.
1146 * @list: list of active widgets for this stream.
1148 * Queries DAPM graph as to whether an valid audio stream path exists for
1149 * the initial stream specified by name. This takes into account
1150 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1152 * Returns the number of valid paths or negative error.
1154 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1155 struct snd_soc_dapm_widget_list **list)
1157 struct snd_soc_card *card = dai->component->card;
1158 struct snd_soc_dapm_widget *w;
1163 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1166 * For is_connected_{output,input}_ep fully discover the graph we need
1167 * to reset the cached number of inputs and outputs.
1169 list_for_each_entry(w, &card->widgets, list) {
1170 w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
1171 w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
1174 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1175 paths = is_connected_output_ep(dai->playback_widget, &widgets);
1177 paths = is_connected_input_ep(dai->capture_widget, &widgets);
1179 /* Drop starting point */
1180 list_del(widgets.next);
1182 ret = dapm_widget_list_create(list, &widgets);
1186 trace_snd_soc_dapm_connected(paths, stream);
1187 mutex_unlock(&card->dapm_mutex);
1193 * Handler for regulator supply widget.
1195 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1196 struct snd_kcontrol *kcontrol, int event)
1200 soc_dapm_async_complete(w->dapm);
1202 if (SND_SOC_DAPM_EVENT_ON(event)) {
1203 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1204 ret = regulator_allow_bypass(w->regulator, false);
1206 dev_warn(w->dapm->dev,
1207 "ASoC: Failed to unbypass %s: %d\n",
1211 return regulator_enable(w->regulator);
1213 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1214 ret = regulator_allow_bypass(w->regulator, true);
1216 dev_warn(w->dapm->dev,
1217 "ASoC: Failed to bypass %s: %d\n",
1221 return regulator_disable_deferred(w->regulator, w->shift);
1224 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1227 * Handler for clock supply widget.
1229 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1230 struct snd_kcontrol *kcontrol, int event)
1235 soc_dapm_async_complete(w->dapm);
1237 #ifdef CONFIG_HAVE_CLK
1238 if (SND_SOC_DAPM_EVENT_ON(event)) {
1239 return clk_prepare_enable(w->clk);
1241 clk_disable_unprepare(w->clk);
1247 EXPORT_SYMBOL_GPL(dapm_clock_event);
1249 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1251 if (w->power_checked)
1252 return w->new_power;
1257 w->new_power = w->power_check(w);
1259 w->power_checked = true;
1261 return w->new_power;
1264 /* Generic check to see if a widget should be powered.
1266 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1270 DAPM_UPDATE_STAT(w, power_checks);
1272 in = is_connected_input_ep(w, NULL);
1273 out = is_connected_output_ep(w, NULL);
1274 return out != 0 && in != 0;
1277 /* Check to see if a power supply is needed */
1278 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1280 struct snd_soc_dapm_path *path;
1282 DAPM_UPDATE_STAT(w, power_checks);
1284 /* Check if one of our outputs is connected */
1285 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1286 DAPM_UPDATE_STAT(w, neighbour_checks);
1291 if (path->connected &&
1292 !path->connected(path->source, path->sink))
1295 if (dapm_widget_power_check(path->sink))
1302 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1307 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1308 struct snd_soc_dapm_widget *b,
1316 sort = dapm_down_seq;
1318 if (sort[a->id] != sort[b->id])
1319 return sort[a->id] - sort[b->id];
1320 if (a->subseq != b->subseq) {
1322 return a->subseq - b->subseq;
1324 return b->subseq - a->subseq;
1326 if (a->reg != b->reg)
1327 return a->reg - b->reg;
1328 if (a->dapm != b->dapm)
1329 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1334 /* Insert a widget in order into a DAPM power sequence. */
1335 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1336 struct list_head *list,
1339 struct snd_soc_dapm_widget *w;
1341 list_for_each_entry(w, list, power_list)
1342 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1343 list_add_tail(&new_widget->power_list, &w->power_list);
1347 list_add_tail(&new_widget->power_list, list);
1350 static void dapm_seq_check_event(struct snd_soc_card *card,
1351 struct snd_soc_dapm_widget *w, int event)
1353 const char *ev_name;
1357 case SND_SOC_DAPM_PRE_PMU:
1358 ev_name = "PRE_PMU";
1361 case SND_SOC_DAPM_POST_PMU:
1362 ev_name = "POST_PMU";
1365 case SND_SOC_DAPM_PRE_PMD:
1366 ev_name = "PRE_PMD";
1369 case SND_SOC_DAPM_POST_PMD:
1370 ev_name = "POST_PMD";
1373 case SND_SOC_DAPM_WILL_PMU:
1374 ev_name = "WILL_PMU";
1377 case SND_SOC_DAPM_WILL_PMD:
1378 ev_name = "WILL_PMD";
1382 WARN(1, "Unknown event %d\n", event);
1386 if (w->new_power != power)
1389 if (w->event && (w->event_flags & event)) {
1390 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1392 soc_dapm_async_complete(w->dapm);
1393 trace_snd_soc_dapm_widget_event_start(w, event);
1394 ret = w->event(w, NULL, event);
1395 trace_snd_soc_dapm_widget_event_done(w, event);
1397 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1398 ev_name, w->name, ret);
1402 /* Apply the coalesced changes from a DAPM sequence */
1403 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1404 struct list_head *pending)
1406 struct snd_soc_dapm_context *dapm;
1407 struct snd_soc_dapm_widget *w;
1409 unsigned int value = 0;
1410 unsigned int mask = 0;
1412 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1416 list_for_each_entry(w, pending, power_list) {
1417 WARN_ON(reg != w->reg || dapm != w->dapm);
1418 w->power = w->new_power;
1420 mask |= w->mask << w->shift;
1422 value |= w->on_val << w->shift;
1424 value |= w->off_val << w->shift;
1426 pop_dbg(dapm->dev, card->pop_time,
1427 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1428 w->name, reg, value, mask);
1430 /* Check for events */
1431 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1432 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1436 /* Any widget will do, they should all be updating the
1440 pop_dbg(dapm->dev, card->pop_time,
1441 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1442 value, mask, reg, card->pop_time);
1443 pop_wait(card->pop_time);
1444 soc_dapm_update_bits(dapm, reg, mask, value);
1447 list_for_each_entry(w, pending, power_list) {
1448 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1449 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1453 /* Apply a DAPM power sequence.
1455 * We walk over a pre-sorted list of widgets to apply power to. In
1456 * order to minimise the number of writes to the device required
1457 * multiple widgets will be updated in a single write where possible.
1458 * Currently anything that requires more than a single write is not
1461 static void dapm_seq_run(struct snd_soc_card *card,
1462 struct list_head *list, int event, bool power_up)
1464 struct snd_soc_dapm_widget *w, *n;
1465 struct snd_soc_dapm_context *d;
1468 int cur_subseq = -1;
1469 int cur_reg = SND_SOC_NOPM;
1470 struct snd_soc_dapm_context *cur_dapm = NULL;
1477 sort = dapm_down_seq;
1479 list_for_each_entry_safe(w, n, list, power_list) {
1482 /* Do we need to apply any queued changes? */
1483 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1484 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1485 if (!list_empty(&pending))
1486 dapm_seq_run_coalesced(card, &pending);
1488 if (cur_dapm && cur_dapm->seq_notifier) {
1489 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1490 if (sort[i] == cur_sort)
1491 cur_dapm->seq_notifier(cur_dapm,
1496 if (cur_dapm && w->dapm != cur_dapm)
1497 soc_dapm_async_complete(cur_dapm);
1499 INIT_LIST_HEAD(&pending);
1501 cur_subseq = INT_MIN;
1502 cur_reg = SND_SOC_NOPM;
1507 case snd_soc_dapm_pre:
1509 list_for_each_entry_safe_continue(w, n, list,
1512 if (event == SND_SOC_DAPM_STREAM_START)
1514 NULL, SND_SOC_DAPM_PRE_PMU);
1515 else if (event == SND_SOC_DAPM_STREAM_STOP)
1517 NULL, SND_SOC_DAPM_PRE_PMD);
1520 case snd_soc_dapm_post:
1522 list_for_each_entry_safe_continue(w, n, list,
1525 if (event == SND_SOC_DAPM_STREAM_START)
1527 NULL, SND_SOC_DAPM_POST_PMU);
1528 else if (event == SND_SOC_DAPM_STREAM_STOP)
1530 NULL, SND_SOC_DAPM_POST_PMD);
1534 /* Queue it up for application */
1535 cur_sort = sort[w->id];
1536 cur_subseq = w->subseq;
1539 list_move(&w->power_list, &pending);
1544 dev_err(w->dapm->dev,
1545 "ASoC: Failed to apply widget power: %d\n", ret);
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,
1558 list_for_each_entry(d, &card->dapm_list, list) {
1559 soc_dapm_async_complete(d);
1563 static void dapm_widget_update(struct snd_soc_card *card)
1565 struct snd_soc_dapm_update *update = card->update;
1566 struct snd_soc_dapm_widget_list *wlist;
1567 struct snd_soc_dapm_widget *w = NULL;
1571 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1574 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1576 for (wi = 0; wi < wlist->num_widgets; wi++) {
1577 w = wlist->widgets[wi];
1579 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1580 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1582 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1590 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1593 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1596 for (wi = 0; wi < wlist->num_widgets; wi++) {
1597 w = wlist->widgets[wi];
1599 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1600 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1602 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1608 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1609 * they're changing state.
1611 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1613 struct snd_soc_dapm_context *d = data;
1616 /* If we're off and we're not supposed to be go into STANDBY */
1617 if (d->bias_level == SND_SOC_BIAS_OFF &&
1618 d->target_bias_level != SND_SOC_BIAS_OFF) {
1620 pm_runtime_get_sync(d->dev);
1622 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1625 "ASoC: Failed to turn on bias: %d\n", ret);
1628 /* Prepare for a transition to ON or away from ON */
1629 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1630 d->bias_level != SND_SOC_BIAS_ON) ||
1631 (d->target_bias_level != SND_SOC_BIAS_ON &&
1632 d->bias_level == SND_SOC_BIAS_ON)) {
1633 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1636 "ASoC: Failed to prepare bias: %d\n", ret);
1640 /* Async callback run prior to DAPM sequences - brings to their final
1643 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1645 struct snd_soc_dapm_context *d = data;
1648 /* If we just powered the last thing off drop to standby bias */
1649 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1650 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1651 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1652 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1654 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1658 /* If we're in standby and can support bias off then do that */
1659 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1660 d->target_bias_level == SND_SOC_BIAS_OFF) {
1661 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1663 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1667 pm_runtime_put(d->dev);
1670 /* If we just powered up then move to active bias */
1671 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1672 d->target_bias_level == SND_SOC_BIAS_ON) {
1673 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1675 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1680 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1681 bool power, bool connect)
1683 /* If a connection is being made or broken then that update
1684 * will have marked the peer dirty, otherwise the widgets are
1685 * not connected and this update has no impact. */
1689 /* If the peer is already in the state we're moving to then we
1690 * won't have an impact on it. */
1691 if (power != peer->power)
1692 dapm_mark_dirty(peer, "peer state change");
1695 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1696 struct list_head *up_list,
1697 struct list_head *down_list)
1699 struct snd_soc_dapm_path *path;
1701 if (w->power == power)
1704 trace_snd_soc_dapm_widget_power(w, power);
1706 /* If we changed our power state perhaps our neigbours changed
1709 snd_soc_dapm_widget_for_each_source_path(w, path)
1710 dapm_widget_set_peer_power(path->source, power, path->connect);
1712 /* Supplies can't affect their outputs, only their inputs */
1713 if (!w->is_supply) {
1714 snd_soc_dapm_widget_for_each_sink_path(w, path)
1715 dapm_widget_set_peer_power(path->sink, power,
1720 dapm_seq_insert(w, up_list, true);
1722 dapm_seq_insert(w, down_list, false);
1725 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1726 struct list_head *up_list,
1727 struct list_head *down_list)
1732 case snd_soc_dapm_pre:
1733 dapm_seq_insert(w, down_list, false);
1735 case snd_soc_dapm_post:
1736 dapm_seq_insert(w, up_list, true);
1740 power = dapm_widget_power_check(w);
1742 dapm_widget_set_power(w, power, up_list, down_list);
1747 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1749 if (dapm->idle_bias_off)
1752 switch (snd_power_get_state(dapm->card->snd_card)) {
1753 case SNDRV_CTL_POWER_D3hot:
1754 case SNDRV_CTL_POWER_D3cold:
1755 return dapm->suspend_bias_off;
1764 * Scan each dapm widget for complete audio path.
1765 * A complete path is a route that has valid endpoints i.e.:-
1767 * o DAC to output pin.
1768 * o Input Pin to ADC.
1769 * o Input pin to Output pin (bypass, sidetone)
1770 * o DAC to ADC (loopback).
1772 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1774 struct snd_soc_dapm_widget *w;
1775 struct snd_soc_dapm_context *d;
1777 LIST_HEAD(down_list);
1778 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1779 enum snd_soc_bias_level bias;
1781 lockdep_assert_held(&card->dapm_mutex);
1783 trace_snd_soc_dapm_start(card);
1785 list_for_each_entry(d, &card->dapm_list, list) {
1786 if (dapm_idle_bias_off(d))
1787 d->target_bias_level = SND_SOC_BIAS_OFF;
1789 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1794 /* Check which widgets we need to power and store them in
1795 * lists indicating if they should be powered up or down. We
1796 * only check widgets that have been flagged as dirty but note
1797 * that new widgets may be added to the dirty list while we
1800 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1801 dapm_power_one_widget(w, &up_list, &down_list);
1804 list_for_each_entry(w, &card->widgets, list) {
1806 case snd_soc_dapm_pre:
1807 case snd_soc_dapm_post:
1808 /* These widgets always need to be powered */
1811 list_del_init(&w->dirty);
1818 /* Supplies and micbiases only bring the
1819 * context up to STANDBY as unless something
1820 * else is active and passing audio they
1821 * generally don't require full power. Signal
1822 * generators are virtual pins and have no
1823 * power impact themselves.
1826 case snd_soc_dapm_siggen:
1827 case snd_soc_dapm_vmid:
1829 case snd_soc_dapm_supply:
1830 case snd_soc_dapm_regulator_supply:
1831 case snd_soc_dapm_clock_supply:
1832 case snd_soc_dapm_micbias:
1833 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1834 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1837 d->target_bias_level = SND_SOC_BIAS_ON;
1844 /* Force all contexts in the card to the same bias state if
1845 * they're not ground referenced.
1847 bias = SND_SOC_BIAS_OFF;
1848 list_for_each_entry(d, &card->dapm_list, list)
1849 if (d->target_bias_level > bias)
1850 bias = d->target_bias_level;
1851 list_for_each_entry(d, &card->dapm_list, list)
1852 if (!dapm_idle_bias_off(d))
1853 d->target_bias_level = bias;
1855 trace_snd_soc_dapm_walk_done(card);
1857 /* Run card bias changes at first */
1858 dapm_pre_sequence_async(&card->dapm, 0);
1859 /* Run other bias changes in parallel */
1860 list_for_each_entry(d, &card->dapm_list, list) {
1861 if (d != &card->dapm)
1862 async_schedule_domain(dapm_pre_sequence_async, d,
1865 async_synchronize_full_domain(&async_domain);
1867 list_for_each_entry(w, &down_list, power_list) {
1868 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1871 list_for_each_entry(w, &up_list, power_list) {
1872 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1875 /* Power down widgets first; try to avoid amplifying pops. */
1876 dapm_seq_run(card, &down_list, event, false);
1878 dapm_widget_update(card);
1881 dapm_seq_run(card, &up_list, event, true);
1883 /* Run all the bias changes in parallel */
1884 list_for_each_entry(d, &card->dapm_list, list) {
1885 if (d != &card->dapm)
1886 async_schedule_domain(dapm_post_sequence_async, d,
1889 async_synchronize_full_domain(&async_domain);
1890 /* Run card bias changes at last */
1891 dapm_post_sequence_async(&card->dapm, 0);
1893 /* do we need to notify any clients that DAPM event is complete */
1894 list_for_each_entry(d, &card->dapm_list, list) {
1895 if (d->stream_event)
1896 d->stream_event(d, event);
1899 pop_dbg(card->dev, card->pop_time,
1900 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1901 pop_wait(card->pop_time);
1903 trace_snd_soc_dapm_done(card);
1908 #ifdef CONFIG_DEBUG_FS
1909 static ssize_t dapm_widget_power_read_file(struct file *file,
1910 char __user *user_buf,
1911 size_t count, loff_t *ppos)
1913 struct snd_soc_dapm_widget *w = file->private_data;
1914 struct snd_soc_card *card = w->dapm->card;
1915 enum snd_soc_dapm_direction dir, rdir;
1919 struct snd_soc_dapm_path *p = NULL;
1921 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1925 mutex_lock(&card->dapm_mutex);
1927 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1932 in = is_connected_input_ep(w, NULL);
1933 out = is_connected_output_ep(w, NULL);
1936 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1937 w->name, w->power ? "On" : "Off",
1938 w->force ? " (forced)" : "", in, out);
1941 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1942 " - R%d(0x%x) mask 0x%x",
1943 w->reg, w->reg, w->mask << w->shift);
1945 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1948 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1950 w->active ? "active" : "inactive");
1952 snd_soc_dapm_for_each_direction(dir) {
1953 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1954 snd_soc_dapm_widget_for_each_path(w, dir, p) {
1955 if (p->connected && !p->connected(w, p->node[rdir]))
1961 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1962 " %s \"%s\" \"%s\"\n",
1963 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
1964 p->name ? p->name : "static",
1965 p->node[rdir]->name);
1969 mutex_unlock(&card->dapm_mutex);
1971 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1977 static const struct file_operations dapm_widget_power_fops = {
1978 .open = simple_open,
1979 .read = dapm_widget_power_read_file,
1980 .llseek = default_llseek,
1983 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1984 size_t count, loff_t *ppos)
1986 struct snd_soc_dapm_context *dapm = file->private_data;
1989 switch (dapm->bias_level) {
1990 case SND_SOC_BIAS_ON:
1993 case SND_SOC_BIAS_PREPARE:
1994 level = "Prepare\n";
1996 case SND_SOC_BIAS_STANDBY:
1997 level = "Standby\n";
1999 case SND_SOC_BIAS_OFF:
2003 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2004 level = "Unknown\n";
2008 return simple_read_from_buffer(user_buf, count, ppos, level,
2012 static const struct file_operations dapm_bias_fops = {
2013 .open = simple_open,
2014 .read = dapm_bias_read_file,
2015 .llseek = default_llseek,
2018 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2019 struct dentry *parent)
2026 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2028 if (!dapm->debugfs_dapm) {
2030 "ASoC: Failed to create DAPM debugfs directory\n");
2034 d = debugfs_create_file("bias_level", 0444,
2035 dapm->debugfs_dapm, dapm,
2039 "ASoC: Failed to create bias level debugfs file\n");
2042 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2044 struct snd_soc_dapm_context *dapm = w->dapm;
2047 if (!dapm->debugfs_dapm || !w->name)
2050 d = debugfs_create_file(w->name, 0444,
2051 dapm->debugfs_dapm, w,
2052 &dapm_widget_power_fops);
2054 dev_warn(w->dapm->dev,
2055 "ASoC: Failed to create %s debugfs file\n",
2059 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2061 debugfs_remove_recursive(dapm->debugfs_dapm);
2065 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2066 struct dentry *parent)
2070 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2074 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2081 * soc_dapm_connect_path() - Connects or disconnects a path
2082 * @path: The path to update
2083 * @connect: The new connect state of the path. True if the path is connected,
2084 * false if it is disconneted.
2085 * @reason: The reason why the path changed (for debugging only)
2087 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2088 bool connect, const char *reason)
2090 if (path->connect == connect)
2093 path->connect = connect;
2094 dapm_mark_dirty(path->source, reason);
2095 dapm_mark_dirty(path->sink, reason);
2096 dapm_path_invalidate(path);
2099 /* test and update the power status of a mux widget */
2100 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2101 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2103 struct snd_soc_dapm_path *path;
2107 lockdep_assert_held(&card->dapm_mutex);
2109 /* find dapm widget path assoc with kcontrol */
2110 dapm_kcontrol_for_each_path(path, kcontrol) {
2112 /* we now need to match the string in the enum to the path */
2113 if (!(strcmp(path->name, e->texts[mux])))
2118 soc_dapm_connect_path(path, connect, "mux update");
2122 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2127 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2128 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2129 struct snd_soc_dapm_update *update)
2131 struct snd_soc_card *card = dapm->card;
2134 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2135 card->update = update;
2136 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2137 card->update = NULL;
2138 mutex_unlock(&card->dapm_mutex);
2140 soc_dpcm_runtime_update(card);
2143 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2145 /* test and update the power status of a mixer or switch widget */
2146 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2147 struct snd_kcontrol *kcontrol, int connect)
2149 struct snd_soc_dapm_path *path;
2152 lockdep_assert_held(&card->dapm_mutex);
2154 /* find dapm widget path assoc with kcontrol */
2155 dapm_kcontrol_for_each_path(path, kcontrol) {
2157 soc_dapm_connect_path(path, connect, "mixer update");
2161 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2166 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2167 struct snd_kcontrol *kcontrol, int connect,
2168 struct snd_soc_dapm_update *update)
2170 struct snd_soc_card *card = dapm->card;
2173 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2174 card->update = update;
2175 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2176 card->update = NULL;
2177 mutex_unlock(&card->dapm_mutex);
2179 soc_dpcm_runtime_update(card);
2182 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2184 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2187 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2188 struct snd_soc_dapm_widget *w;
2190 char *state = "not set";
2192 /* card won't be set for the dummy component, as a spot fix
2193 * we're checking for that case specifically here but in future
2194 * we will ensure that the dummy component looks like others.
2199 list_for_each_entry(w, &cmpnt->card->widgets, list) {
2200 if (w->dapm != dapm)
2203 /* only display widgets that burnm power */
2205 case snd_soc_dapm_hp:
2206 case snd_soc_dapm_mic:
2207 case snd_soc_dapm_spk:
2208 case snd_soc_dapm_line:
2209 case snd_soc_dapm_micbias:
2210 case snd_soc_dapm_dac:
2211 case snd_soc_dapm_adc:
2212 case snd_soc_dapm_pga:
2213 case snd_soc_dapm_out_drv:
2214 case snd_soc_dapm_mixer:
2215 case snd_soc_dapm_mixer_named_ctl:
2216 case snd_soc_dapm_supply:
2217 case snd_soc_dapm_regulator_supply:
2218 case snd_soc_dapm_clock_supply:
2220 count += sprintf(buf + count, "%s: %s\n",
2221 w->name, w->power ? "On":"Off");
2228 switch (snd_soc_dapm_get_bias_level(dapm)) {
2229 case SND_SOC_BIAS_ON:
2232 case SND_SOC_BIAS_PREPARE:
2235 case SND_SOC_BIAS_STANDBY:
2238 case SND_SOC_BIAS_OFF:
2242 count += sprintf(buf + count, "PM State: %s\n", state);
2247 /* show dapm widget status in sys fs */
2248 static ssize_t dapm_widget_show(struct device *dev,
2249 struct device_attribute *attr, char *buf)
2251 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2254 mutex_lock(&rtd->card->dapm_mutex);
2256 for (i = 0; i < rtd->num_codecs; i++) {
2257 struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
2259 count += dapm_widget_show_component(cmpnt, buf + count);
2262 mutex_unlock(&rtd->card->dapm_mutex);
2267 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2269 struct attribute *soc_dapm_dev_attrs[] = {
2270 &dev_attr_dapm_widget.attr,
2274 static void dapm_free_path(struct snd_soc_dapm_path *path)
2276 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2277 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2278 list_del(&path->list_kcontrol);
2279 list_del(&path->list);
2283 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2285 struct snd_soc_dapm_path *p, *next_p;
2286 enum snd_soc_dapm_direction dir;
2290 * remove source and sink paths associated to this widget.
2291 * While removing the path, remove reference to it from both
2292 * source and sink widgets so that path is removed only once.
2294 snd_soc_dapm_for_each_direction(dir) {
2295 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2299 kfree(w->kcontrols);
2300 kfree_const(w->name);
2304 void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
2306 dapm->path_sink_cache.widget = NULL;
2307 dapm->path_source_cache.widget = NULL;
2310 /* free all dapm widgets and resources */
2311 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2313 struct snd_soc_dapm_widget *w, *next_w;
2315 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2316 if (w->dapm != dapm)
2318 snd_soc_dapm_free_widget(w);
2320 snd_soc_dapm_reset_cache(dapm);
2323 static struct snd_soc_dapm_widget *dapm_find_widget(
2324 struct snd_soc_dapm_context *dapm, const char *pin,
2325 bool search_other_contexts)
2327 struct snd_soc_dapm_widget *w;
2328 struct snd_soc_dapm_widget *fallback = NULL;
2330 list_for_each_entry(w, &dapm->card->widgets, list) {
2331 if (!strcmp(w->name, pin)) {
2332 if (w->dapm == dapm)
2339 if (search_other_contexts)
2345 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2346 const char *pin, int status)
2348 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2350 dapm_assert_locked(dapm);
2353 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2357 if (w->connected != status) {
2358 dapm_mark_dirty(w, "pin configuration");
2359 dapm_widget_invalidate_input_paths(w);
2360 dapm_widget_invalidate_output_paths(w);
2363 w->connected = status;
2371 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2372 * @dapm: DAPM context
2374 * Walks all dapm audio paths and powers widgets according to their
2375 * stream or path usage.
2377 * Requires external locking.
2379 * Returns 0 for success.
2381 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2384 * Suppress early reports (eg, jacks syncing their state) to avoid
2385 * silly DAPM runs during card startup.
2387 if (!dapm->card || !dapm->card->instantiated)
2390 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2392 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2395 * snd_soc_dapm_sync - scan and power dapm paths
2396 * @dapm: DAPM context
2398 * Walks all dapm audio paths and powers widgets according to their
2399 * stream or path usage.
2401 * Returns 0 for success.
2403 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2407 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2408 ret = snd_soc_dapm_sync_unlocked(dapm);
2409 mutex_unlock(&dapm->card->dapm_mutex);
2412 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2415 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2416 * @w: The widget for which to update the flags
2418 * Some widgets have a dynamic category which depends on which neighbors they
2419 * are connected to. This function update the category for these widgets.
2421 * This function must be called whenever a path is added or removed to a widget.
2423 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2425 enum snd_soc_dapm_direction dir;
2426 struct snd_soc_dapm_path *p;
2430 case snd_soc_dapm_input:
2431 /* On a fully routed card a input is never a source */
2432 if (w->dapm->card->fully_routed)
2434 ep = SND_SOC_DAPM_EP_SOURCE;
2435 snd_soc_dapm_widget_for_each_source_path(w, p) {
2436 if (p->source->id == snd_soc_dapm_micbias ||
2437 p->source->id == snd_soc_dapm_mic ||
2438 p->source->id == snd_soc_dapm_line ||
2439 p->source->id == snd_soc_dapm_output) {
2445 case snd_soc_dapm_output:
2446 /* On a fully routed card a output is never a sink */
2447 if (w->dapm->card->fully_routed)
2449 ep = SND_SOC_DAPM_EP_SINK;
2450 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2451 if (p->sink->id == snd_soc_dapm_spk ||
2452 p->sink->id == snd_soc_dapm_hp ||
2453 p->sink->id == snd_soc_dapm_line ||
2454 p->sink->id == snd_soc_dapm_input) {
2460 case snd_soc_dapm_line:
2462 snd_soc_dapm_for_each_direction(dir) {
2463 if (!list_empty(&w->edges[dir]))
2464 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2474 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2475 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2476 const char *control)
2478 bool dynamic_source = false;
2479 bool dynamic_sink = false;
2484 switch (source->id) {
2485 case snd_soc_dapm_demux:
2486 dynamic_source = true;
2493 case snd_soc_dapm_mux:
2494 case snd_soc_dapm_switch:
2495 case snd_soc_dapm_mixer:
2496 case snd_soc_dapm_mixer_named_ctl:
2497 dynamic_sink = true;
2503 if (dynamic_source && dynamic_sink) {
2505 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2506 source->name, control, sink->name);
2508 } else if (!dynamic_source && !dynamic_sink) {
2510 "Control not supported for path %s -> [%s] -> %s\n",
2511 source->name, control, sink->name);
2518 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2519 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2520 const char *control,
2521 int (*connected)(struct snd_soc_dapm_widget *source,
2522 struct snd_soc_dapm_widget *sink))
2524 struct snd_soc_dapm_widget *widgets[2];
2525 enum snd_soc_dapm_direction dir;
2526 struct snd_soc_dapm_path *path;
2529 if (wsink->is_supply && !wsource->is_supply) {
2531 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2532 wsource->name, wsink->name);
2536 if (connected && !wsource->is_supply) {
2538 "connected() callback only supported for supply widgets (%s -> %s)\n",
2539 wsource->name, wsink->name);
2543 if (wsource->is_supply && control) {
2545 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2546 wsource->name, control, wsink->name);
2550 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2554 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2558 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2559 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2560 widgets[SND_SOC_DAPM_DIR_IN] = wsource;
2561 widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
2563 path->connected = connected;
2564 INIT_LIST_HEAD(&path->list);
2565 INIT_LIST_HEAD(&path->list_kcontrol);
2567 if (wsource->is_supply || wsink->is_supply)
2568 path->is_supply = 1;
2570 /* connect static paths */
2571 if (control == NULL) {
2574 switch (wsource->id) {
2575 case snd_soc_dapm_demux:
2576 ret = dapm_connect_mux(dapm, path, control, wsource);
2584 switch (wsink->id) {
2585 case snd_soc_dapm_mux:
2586 ret = dapm_connect_mux(dapm, path, control, wsink);
2590 case snd_soc_dapm_switch:
2591 case snd_soc_dapm_mixer:
2592 case snd_soc_dapm_mixer_named_ctl:
2593 ret = dapm_connect_mixer(dapm, path, control);
2602 list_add(&path->list, &dapm->card->paths);
2603 snd_soc_dapm_for_each_direction(dir)
2604 list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
2606 snd_soc_dapm_for_each_direction(dir) {
2607 dapm_update_widget_flags(widgets[dir]);
2608 dapm_mark_dirty(widgets[dir], "Route added");
2611 if (dapm->card->instantiated && path->connect)
2612 dapm_path_invalidate(path);
2620 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2621 const struct snd_soc_dapm_route *route)
2623 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2624 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2627 char prefixed_sink[80];
2628 char prefixed_source[80];
2632 prefix = soc_dapm_prefix(dapm);
2634 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2635 prefix, route->sink);
2636 sink = prefixed_sink;
2637 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2638 prefix, route->source);
2639 source = prefixed_source;
2642 source = route->source;
2645 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2646 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2648 if (wsink && wsource)
2652 * find src and dest widgets over all widgets but favor a widget from
2653 * current DAPM context
2655 list_for_each_entry(w, &dapm->card->widgets, list) {
2656 if (!wsink && !(strcmp(w->name, sink))) {
2658 if (w->dapm == dapm) {
2665 if (!wsource && !(strcmp(w->name, source))) {
2667 if (w->dapm == dapm) {
2674 /* use widget from another DAPM context if not found from this */
2680 if (wsource == NULL) {
2681 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2685 if (wsink == NULL) {
2686 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2692 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2693 dapm_wcache_update(&dapm->path_source_cache, wsource);
2695 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2702 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2703 source, route->control, sink);
2707 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2708 const struct snd_soc_dapm_route *route)
2710 struct snd_soc_dapm_widget *wsource, *wsink;
2711 struct snd_soc_dapm_path *path, *p;
2714 char prefixed_sink[80];
2715 char prefixed_source[80];
2718 if (route->control) {
2720 "ASoC: Removal of routes with controls not supported\n");
2724 prefix = soc_dapm_prefix(dapm);
2726 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2727 prefix, route->sink);
2728 sink = prefixed_sink;
2729 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2730 prefix, route->source);
2731 source = prefixed_source;
2734 source = route->source;
2738 list_for_each_entry(p, &dapm->card->paths, list) {
2739 if (strcmp(p->source->name, source) != 0)
2741 if (strcmp(p->sink->name, sink) != 0)
2748 wsource = path->source;
2751 dapm_mark_dirty(wsource, "Route removed");
2752 dapm_mark_dirty(wsink, "Route removed");
2754 dapm_path_invalidate(path);
2756 dapm_free_path(path);
2758 /* Update any path related flags */
2759 dapm_update_widget_flags(wsource);
2760 dapm_update_widget_flags(wsink);
2762 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2770 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2771 * @dapm: DAPM context
2772 * @route: audio routes
2773 * @num: number of routes
2775 * Connects 2 dapm widgets together via a named audio path. The sink is
2776 * the widget receiving the audio signal, whilst the source is the sender
2777 * of the audio signal.
2779 * Returns 0 for success else error. On error all resources can be freed
2780 * with a call to snd_soc_card_free().
2782 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2783 const struct snd_soc_dapm_route *route, int num)
2787 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2788 for (i = 0; i < num; i++) {
2789 r = snd_soc_dapm_add_route(dapm, route);
2791 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2793 route->control ? route->control : "direct",
2799 mutex_unlock(&dapm->card->dapm_mutex);
2803 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2806 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2807 * @dapm: DAPM context
2808 * @route: audio routes
2809 * @num: number of routes
2811 * Removes routes from the DAPM context.
2813 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2814 const struct snd_soc_dapm_route *route, int num)
2818 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2819 for (i = 0; i < num; i++) {
2820 snd_soc_dapm_del_route(dapm, route);
2823 mutex_unlock(&dapm->card->dapm_mutex);
2827 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2829 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2830 const struct snd_soc_dapm_route *route)
2832 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2835 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2838 struct snd_soc_dapm_path *path;
2842 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2848 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2853 if (route->control || route->connected)
2854 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2855 route->source, route->sink);
2857 snd_soc_dapm_widget_for_each_sink_path(source, path) {
2858 if (path->sink == sink) {
2865 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2866 route->source, route->sink);
2868 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2869 count, route->source, route->sink);
2875 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2876 * @dapm: DAPM context
2877 * @route: audio routes
2878 * @num: number of routes
2880 * Mark existing routes matching those specified in the passed array
2881 * as being weak, meaning that they are ignored for the purpose of
2882 * power decisions. The main intended use case is for sidetone paths
2883 * which couple audio between other independent paths if they are both
2884 * active in order to make the combination work better at the user
2885 * level but which aren't intended to be "used".
2887 * Note that CODEC drivers should not use this as sidetone type paths
2888 * can frequently also be used as bypass paths.
2890 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2891 const struct snd_soc_dapm_route *route, int num)
2896 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2897 for (i = 0; i < num; i++) {
2898 err = snd_soc_dapm_weak_route(dapm, route);
2903 mutex_unlock(&dapm->card->dapm_mutex);
2907 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2910 * snd_soc_dapm_new_widgets - add new dapm widgets
2911 * @card: card to be checked for new dapm widgets
2913 * Checks the codec for any new dapm widgets and creates them if found.
2915 * Returns 0 for success.
2917 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2919 struct snd_soc_dapm_widget *w;
2922 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2924 list_for_each_entry(w, &card->widgets, list)
2929 if (w->num_kcontrols) {
2930 w->kcontrols = kzalloc(w->num_kcontrols *
2931 sizeof(struct snd_kcontrol *),
2933 if (!w->kcontrols) {
2934 mutex_unlock(&card->dapm_mutex);
2940 case snd_soc_dapm_switch:
2941 case snd_soc_dapm_mixer:
2942 case snd_soc_dapm_mixer_named_ctl:
2945 case snd_soc_dapm_mux:
2946 case snd_soc_dapm_demux:
2949 case snd_soc_dapm_pga:
2950 case snd_soc_dapm_out_drv:
2953 case snd_soc_dapm_dai_link:
2954 dapm_new_dai_link(w);
2960 /* Read the initial power state from the device */
2962 soc_dapm_read(w->dapm, w->reg, &val);
2963 val = val >> w->shift;
2965 if (val == w->on_val)
2971 dapm_mark_dirty(w, "new widget");
2972 dapm_debugfs_add_widget(w);
2975 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2976 mutex_unlock(&card->dapm_mutex);
2979 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2982 * snd_soc_dapm_get_volsw - dapm mixer get callback
2983 * @kcontrol: mixer control
2984 * @ucontrol: control element information
2986 * Callback to get the value of a dapm mixer control.
2988 * Returns 0 for success.
2990 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2991 struct snd_ctl_elem_value *ucontrol)
2993 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2994 struct snd_soc_card *card = dapm->card;
2995 struct soc_mixer_control *mc =
2996 (struct soc_mixer_control *)kcontrol->private_value;
2998 unsigned int shift = mc->shift;
3000 unsigned int mask = (1 << fls(max)) - 1;
3001 unsigned int invert = mc->invert;
3005 if (snd_soc_volsw_is_stereo(mc))
3007 "ASoC: Control '%s' is stereo, which is not supported\n",
3010 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3011 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3012 ret = soc_dapm_read(dapm, reg, &val);
3013 val = (val >> shift) & mask;
3015 val = dapm_kcontrol_get_value(kcontrol);
3017 mutex_unlock(&card->dapm_mutex);
3023 ucontrol->value.integer.value[0] = max - val;
3025 ucontrol->value.integer.value[0] = val;
3029 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3032 * snd_soc_dapm_put_volsw - dapm mixer set callback
3033 * @kcontrol: mixer control
3034 * @ucontrol: control element information
3036 * Callback to set the value of a dapm mixer control.
3038 * Returns 0 for success.
3040 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3041 struct snd_ctl_elem_value *ucontrol)
3043 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3044 struct snd_soc_card *card = dapm->card;
3045 struct soc_mixer_control *mc =
3046 (struct soc_mixer_control *)kcontrol->private_value;
3048 unsigned int shift = mc->shift;
3050 unsigned int mask = (1 << fls(max)) - 1;
3051 unsigned int invert = mc->invert;
3053 int connect, change, reg_change = 0;
3054 struct snd_soc_dapm_update update;
3057 if (snd_soc_volsw_is_stereo(mc))
3059 "ASoC: Control '%s' is stereo, which is not supported\n",
3062 val = (ucontrol->value.integer.value[0] & mask);
3068 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3070 change = dapm_kcontrol_set_value(kcontrol, val);
3072 if (reg != SND_SOC_NOPM) {
3073 mask = mask << shift;
3076 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3079 if (change || reg_change) {
3081 update.kcontrol = kcontrol;
3085 card->update = &update;
3087 change |= reg_change;
3089 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3091 card->update = NULL;
3094 mutex_unlock(&card->dapm_mutex);
3097 soc_dpcm_runtime_update(card);
3101 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3104 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3105 * @kcontrol: mixer control
3106 * @ucontrol: control element information
3108 * Callback to get the value of a dapm enumerated double mixer control.
3110 * Returns 0 for success.
3112 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3113 struct snd_ctl_elem_value *ucontrol)
3115 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3116 struct snd_soc_card *card = dapm->card;
3117 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3118 unsigned int reg_val, val;
3120 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3121 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3122 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3124 mutex_unlock(&card->dapm_mutex);
3128 reg_val = dapm_kcontrol_get_value(kcontrol);
3130 mutex_unlock(&card->dapm_mutex);
3132 val = (reg_val >> e->shift_l) & e->mask;
3133 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3134 if (e->shift_l != e->shift_r) {
3135 val = (reg_val >> e->shift_r) & e->mask;
3136 val = snd_soc_enum_val_to_item(e, val);
3137 ucontrol->value.enumerated.item[1] = val;
3142 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3145 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3146 * @kcontrol: mixer control
3147 * @ucontrol: control element information
3149 * Callback to set the value of a dapm enumerated double mixer control.
3151 * Returns 0 for success.
3153 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3154 struct snd_ctl_elem_value *ucontrol)
3156 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3157 struct snd_soc_card *card = dapm->card;
3158 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3159 unsigned int *item = ucontrol->value.enumerated.item;
3160 unsigned int val, change, reg_change = 0;
3162 struct snd_soc_dapm_update update;
3165 if (item[0] >= e->items)
3168 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3169 mask = e->mask << e->shift_l;
3170 if (e->shift_l != e->shift_r) {
3171 if (item[1] > e->items)
3173 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3174 mask |= e->mask << e->shift_r;
3177 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3179 change = dapm_kcontrol_set_value(kcontrol, val);
3181 if (e->reg != SND_SOC_NOPM)
3182 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3184 if (change || reg_change) {
3186 update.kcontrol = kcontrol;
3187 update.reg = e->reg;
3190 card->update = &update;
3192 change |= reg_change;
3194 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3196 card->update = NULL;
3199 mutex_unlock(&card->dapm_mutex);
3202 soc_dpcm_runtime_update(card);
3206 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3209 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3211 * @kcontrol: mixer control
3212 * @uinfo: control element information
3214 * Callback to provide information about a pin switch control.
3216 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3217 struct snd_ctl_elem_info *uinfo)
3219 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3221 uinfo->value.integer.min = 0;
3222 uinfo->value.integer.max = 1;
3226 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3229 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3231 * @kcontrol: mixer control
3234 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3235 struct snd_ctl_elem_value *ucontrol)
3237 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3238 const char *pin = (const char *)kcontrol->private_value;
3240 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3242 ucontrol->value.integer.value[0] =
3243 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3245 mutex_unlock(&card->dapm_mutex);
3249 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3252 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3254 * @kcontrol: mixer control
3257 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3258 struct snd_ctl_elem_value *ucontrol)
3260 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3261 const char *pin = (const char *)kcontrol->private_value;
3263 if (ucontrol->value.integer.value[0])
3264 snd_soc_dapm_enable_pin(&card->dapm, pin);
3266 snd_soc_dapm_disable_pin(&card->dapm, pin);
3268 snd_soc_dapm_sync(&card->dapm);
3271 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3273 struct snd_soc_dapm_widget *
3274 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3275 const struct snd_soc_dapm_widget *widget)
3277 struct snd_soc_dapm_widget *w;
3279 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3280 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3283 "ASoC: Failed to create DAPM control %s\n",
3286 mutex_unlock(&dapm->card->dapm_mutex);
3290 struct snd_soc_dapm_widget *
3291 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3292 const struct snd_soc_dapm_widget *widget)
3294 enum snd_soc_dapm_direction dir;
3295 struct snd_soc_dapm_widget *w;
3299 if ((w = dapm_cnew_widget(widget)) == NULL)
3303 case snd_soc_dapm_regulator_supply:
3304 w->regulator = devm_regulator_get(dapm->dev, w->name);
3305 if (IS_ERR(w->regulator)) {
3306 ret = PTR_ERR(w->regulator);
3307 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3312 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3313 ret = regulator_allow_bypass(w->regulator, true);
3315 dev_warn(w->dapm->dev,
3316 "ASoC: Failed to bypass %s: %d\n",
3320 case snd_soc_dapm_clock_supply:
3321 #ifdef CONFIG_CLKDEV_LOOKUP
3322 w->clk = devm_clk_get(dapm->dev, w->name);
3323 if (IS_ERR(w->clk)) {
3324 ret = PTR_ERR(w->clk);
3325 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3337 prefix = soc_dapm_prefix(dapm);
3339 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3341 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3342 if (w->name == NULL) {
3348 case snd_soc_dapm_mic:
3349 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3350 w->power_check = dapm_generic_check_power;
3352 case snd_soc_dapm_input:
3353 if (!dapm->card->fully_routed)
3354 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3355 w->power_check = dapm_generic_check_power;
3357 case snd_soc_dapm_spk:
3358 case snd_soc_dapm_hp:
3359 w->is_ep = SND_SOC_DAPM_EP_SINK;
3360 w->power_check = dapm_generic_check_power;
3362 case snd_soc_dapm_output:
3363 if (!dapm->card->fully_routed)
3364 w->is_ep = SND_SOC_DAPM_EP_SINK;
3365 w->power_check = dapm_generic_check_power;
3367 case snd_soc_dapm_vmid:
3368 case snd_soc_dapm_siggen:
3369 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3370 w->power_check = dapm_always_on_check_power;
3372 case snd_soc_dapm_mux:
3373 case snd_soc_dapm_demux:
3374 case snd_soc_dapm_switch:
3375 case snd_soc_dapm_mixer:
3376 case snd_soc_dapm_mixer_named_ctl:
3377 case snd_soc_dapm_adc:
3378 case snd_soc_dapm_aif_out:
3379 case snd_soc_dapm_dac:
3380 case snd_soc_dapm_aif_in:
3381 case snd_soc_dapm_pga:
3382 case snd_soc_dapm_out_drv:
3383 case snd_soc_dapm_micbias:
3384 case snd_soc_dapm_line:
3385 case snd_soc_dapm_dai_link:
3386 case snd_soc_dapm_dai_out:
3387 case snd_soc_dapm_dai_in:
3388 w->power_check = dapm_generic_check_power;
3390 case snd_soc_dapm_supply:
3391 case snd_soc_dapm_regulator_supply:
3392 case snd_soc_dapm_clock_supply:
3393 case snd_soc_dapm_kcontrol:
3395 w->power_check = dapm_supply_check_power;
3398 w->power_check = dapm_always_on_check_power;
3403 INIT_LIST_HEAD(&w->list);
3404 INIT_LIST_HEAD(&w->dirty);
3405 list_add_tail(&w->list, &dapm->card->widgets);
3407 snd_soc_dapm_for_each_direction(dir) {
3408 INIT_LIST_HEAD(&w->edges[dir]);
3409 w->endpoints[dir] = -1;
3412 /* machine layer set ups unconnected pins and insertions */
3418 * snd_soc_dapm_new_controls - create new dapm controls
3419 * @dapm: DAPM context
3420 * @widget: widget array
3421 * @num: number of widgets
3423 * Creates new DAPM controls based upon the templates.
3425 * Returns 0 for success else error.
3427 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3428 const struct snd_soc_dapm_widget *widget,
3431 struct snd_soc_dapm_widget *w;
3435 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3436 for (i = 0; i < num; i++) {
3437 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3440 "ASoC: Failed to create DAPM control %s\n",
3447 mutex_unlock(&dapm->card->dapm_mutex);
3450 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3452 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3453 struct snd_kcontrol *kcontrol, int event)
3455 struct snd_soc_dapm_path *source_p, *sink_p;
3456 struct snd_soc_dai *source, *sink;
3457 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3458 struct snd_pcm_substream substream;
3459 struct snd_pcm_hw_params *params = NULL;
3463 if (WARN_ON(!config) ||
3464 WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3465 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3468 /* We only support a single source and sink, pick the first */
3469 source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
3470 struct snd_soc_dapm_path,
3471 list_node[SND_SOC_DAPM_DIR_OUT]);
3472 sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
3473 struct snd_soc_dapm_path,
3474 list_node[SND_SOC_DAPM_DIR_IN]);
3476 source = source_p->source->priv;
3477 sink = sink_p->sink->priv;
3479 /* Be a little careful as we don't want to overflow the mask array */
3480 if (config->formats) {
3481 fmt = ffs(config->formats) - 1;
3483 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3488 /* Currently very limited parameter selection */
3489 params = kzalloc(sizeof(*params), GFP_KERNEL);
3494 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3496 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3498 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3501 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3502 = config->channels_min;
3503 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3504 = config->channels_max;
3506 memset(&substream, 0, sizeof(substream));
3509 case SND_SOC_DAPM_PRE_PMU:
3510 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3511 if (source->driver->ops && source->driver->ops->startup) {
3512 ret = source->driver->ops->startup(&substream, source);
3514 dev_err(source->dev,
3515 "ASoC: startup() failed: %d\n", ret);
3520 ret = soc_dai_hw_params(&substream, params, source);
3524 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3525 if (sink->driver->ops && sink->driver->ops->startup) {
3526 ret = sink->driver->ops->startup(&substream, sink);
3529 "ASoC: startup() failed: %d\n", ret);
3534 ret = soc_dai_hw_params(&substream, params, sink);
3539 case SND_SOC_DAPM_POST_PMU:
3540 ret = snd_soc_dai_digital_mute(sink, 0,
3541 SNDRV_PCM_STREAM_PLAYBACK);
3542 if (ret != 0 && ret != -ENOTSUPP)
3543 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3547 case SND_SOC_DAPM_PRE_PMD:
3548 ret = snd_soc_dai_digital_mute(sink, 1,
3549 SNDRV_PCM_STREAM_PLAYBACK);
3550 if (ret != 0 && ret != -ENOTSUPP)
3551 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3555 if (source->driver->ops && source->driver->ops->shutdown) {
3556 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3557 source->driver->ops->shutdown(&substream, source);
3561 if (sink->driver->ops && sink->driver->ops->shutdown) {
3562 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3563 sink->driver->ops->shutdown(&substream, sink);
3568 WARN(1, "Unknown event %d\n", event);
3577 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3578 struct snd_ctl_elem_value *ucontrol)
3580 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3582 ucontrol->value.enumerated.item[0] = w->params_select;
3587 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3588 struct snd_ctl_elem_value *ucontrol)
3590 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3592 /* Can't change the config when widget is already powered */
3596 if (ucontrol->value.enumerated.item[0] == w->params_select)
3599 if (ucontrol->value.enumerated.item[0] >= w->num_params)
3602 w->params_select = ucontrol->value.enumerated.item[0];
3607 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3608 const struct snd_soc_pcm_stream *params,
3609 unsigned int num_params,
3610 struct snd_soc_dapm_widget *source,
3611 struct snd_soc_dapm_widget *sink)
3613 struct snd_soc_dapm_widget template;
3614 struct snd_soc_dapm_widget *w;
3617 unsigned long private_value;
3618 const char **w_param_text;
3619 struct soc_enum w_param_enum[] = {
3620 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3622 struct snd_kcontrol_new kcontrol_dai_link[] = {
3623 SOC_ENUM_EXT(NULL, w_param_enum[0],
3624 snd_soc_dapm_dai_link_get,
3625 snd_soc_dapm_dai_link_put),
3627 const struct snd_soc_pcm_stream *config = params;
3629 w_param_text = devm_kcalloc(card->dev, num_params,
3630 sizeof(char *), GFP_KERNEL);
3634 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3635 source->name, sink->name);
3638 goto outfree_w_param;
3641 for (count = 0 ; count < num_params; count++) {
3642 if (!config->stream_name) {
3643 dev_warn(card->dapm.dev,
3644 "ASoC: anonymous config %d for dai link %s\n",
3646 w_param_text[count] =
3647 devm_kasprintf(card->dev, GFP_KERNEL,
3648 "Anonymous Configuration %d",
3650 if (!w_param_text[count]) {
3652 goto outfree_link_name;
3655 w_param_text[count] = devm_kmemdup(card->dev,
3656 config->stream_name,
3657 strlen(config->stream_name) + 1,
3659 if (!w_param_text[count]) {
3661 goto outfree_link_name;
3666 w_param_enum[0].items = num_params;
3667 w_param_enum[0].texts = w_param_text;
3669 memset(&template, 0, sizeof(template));
3670 template.reg = SND_SOC_NOPM;
3671 template.id = snd_soc_dapm_dai_link;
3672 template.name = link_name;
3673 template.event = snd_soc_dai_link_event;
3674 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3675 SND_SOC_DAPM_PRE_PMD;
3676 template.num_kcontrols = 1;
3677 /* duplicate w_param_enum on heap so that memory persists */
3679 (unsigned long) devm_kmemdup(card->dev,
3680 (void *)(kcontrol_dai_link[0].private_value),
3681 sizeof(struct soc_enum), GFP_KERNEL);
3682 if (!private_value) {
3683 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3686 goto outfree_link_name;
3688 kcontrol_dai_link[0].private_value = private_value;
3689 /* duplicate kcontrol_dai_link on heap so that memory persists */
3690 template.kcontrol_news =
3691 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3692 sizeof(struct snd_kcontrol_new),
3694 if (!template.kcontrol_news) {
3695 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3698 goto outfree_private_value;
3701 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3703 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3705 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3708 goto outfree_kcontrol_news;
3712 w->num_params = num_params;
3714 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3717 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3720 devm_kfree(card->dev, w);
3721 outfree_kcontrol_news:
3722 devm_kfree(card->dev, (void *)template.kcontrol_news);
3723 outfree_private_value:
3724 devm_kfree(card->dev, (void *)private_value);
3726 devm_kfree(card->dev, link_name);
3728 for (count = 0 ; count < num_params; count++)
3729 devm_kfree(card->dev, (void *)w_param_text[count]);
3730 devm_kfree(card->dev, w_param_text);
3735 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3736 struct snd_soc_dai *dai)
3738 struct snd_soc_dapm_widget template;
3739 struct snd_soc_dapm_widget *w;
3741 WARN_ON(dapm->dev != dai->dev);
3743 memset(&template, 0, sizeof(template));
3744 template.reg = SND_SOC_NOPM;
3746 if (dai->driver->playback.stream_name) {
3747 template.id = snd_soc_dapm_dai_in;
3748 template.name = dai->driver->playback.stream_name;
3749 template.sname = dai->driver->playback.stream_name;
3751 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3754 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3756 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3757 dai->driver->playback.stream_name);
3762 dai->playback_widget = w;
3765 if (dai->driver->capture.stream_name) {
3766 template.id = snd_soc_dapm_dai_out;
3767 template.name = dai->driver->capture.stream_name;
3768 template.sname = dai->driver->capture.stream_name;
3770 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3773 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3775 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3776 dai->driver->capture.stream_name);
3781 dai->capture_widget = w;
3787 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3789 struct snd_soc_dapm_widget *dai_w, *w;
3790 struct snd_soc_dapm_widget *src, *sink;
3791 struct snd_soc_dai *dai;
3793 /* For each DAI widget... */
3794 list_for_each_entry(dai_w, &card->widgets, list) {
3795 switch (dai_w->id) {
3796 case snd_soc_dapm_dai_in:
3797 case snd_soc_dapm_dai_out:
3805 /* ...find all widgets with the same stream and link them */
3806 list_for_each_entry(w, &card->widgets, list) {
3807 if (w->dapm != dai_w->dapm)
3811 case snd_soc_dapm_dai_in:
3812 case snd_soc_dapm_dai_out:
3818 if (!w->sname || !strstr(w->sname, dai_w->sname))
3821 if (dai_w->id == snd_soc_dapm_dai_in) {
3828 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3829 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3836 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3837 struct snd_soc_pcm_runtime *rtd)
3839 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3840 struct snd_soc_dapm_widget *sink, *source;
3843 for (i = 0; i < rtd->num_codecs; i++) {
3844 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3846 /* connect BE DAI playback if widgets are valid */
3847 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3848 source = cpu_dai->playback_widget;
3849 sink = codec_dai->playback_widget;
3850 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3851 cpu_dai->component->name, source->name,
3852 codec_dai->component->name, sink->name);
3854 snd_soc_dapm_add_path(&card->dapm, source, sink,
3858 /* connect BE DAI capture if widgets are valid */
3859 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3860 source = codec_dai->capture_widget;
3861 sink = cpu_dai->capture_widget;
3862 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3863 codec_dai->component->name, source->name,
3864 cpu_dai->component->name, sink->name);
3866 snd_soc_dapm_add_path(&card->dapm, source, sink,
3872 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3875 struct snd_soc_dapm_widget *w;
3878 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3879 w = dai->playback_widget;
3881 w = dai->capture_widget;
3884 dapm_mark_dirty(w, "stream event");
3886 if (w->id == snd_soc_dapm_dai_in) {
3887 ep = SND_SOC_DAPM_EP_SOURCE;
3888 dapm_widget_invalidate_input_paths(w);
3890 ep = SND_SOC_DAPM_EP_SINK;
3891 dapm_widget_invalidate_output_paths(w);
3895 case SND_SOC_DAPM_STREAM_START:
3899 case SND_SOC_DAPM_STREAM_STOP:
3903 case SND_SOC_DAPM_STREAM_SUSPEND:
3904 case SND_SOC_DAPM_STREAM_RESUME:
3905 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3906 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3912 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3914 struct snd_soc_pcm_runtime *rtd = card->rtd;
3917 /* for each BE DAI link... */
3918 for (i = 0; i < card->num_rtd; i++) {
3919 rtd = &card->rtd[i];
3922 * dynamic FE links have no fixed DAI mapping.
3923 * CODEC<->CODEC links have no direct connection.
3925 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3928 dapm_connect_dai_link_widgets(card, rtd);
3932 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3937 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
3938 for (i = 0; i < rtd->num_codecs; i++)
3939 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
3941 dapm_power_widgets(rtd->card, event);
3945 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3946 * @rtd: PCM runtime data
3947 * @stream: stream name
3948 * @event: stream event
3950 * Sends a stream event to the dapm core. The core then makes any
3951 * necessary widget power changes.
3953 * Returns 0 for success else error.
3955 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3958 struct snd_soc_card *card = rtd->card;
3960 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3961 soc_dapm_stream_event(rtd, stream, event);
3962 mutex_unlock(&card->dapm_mutex);
3966 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3967 * @dapm: DAPM context
3970 * Enables input/output pin and its parents or children widgets iff there is
3971 * a valid audio route and active audio stream.
3973 * Requires external locking.
3975 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3976 * do any widget power switching.
3978 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3981 return snd_soc_dapm_set_pin(dapm, pin, 1);
3983 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3986 * snd_soc_dapm_enable_pin - enable pin.
3987 * @dapm: DAPM context
3990 * Enables input/output pin and its parents or children widgets iff there is
3991 * a valid audio route and active audio stream.
3993 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3994 * do any widget power switching.
3996 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4000 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4002 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4004 mutex_unlock(&dapm->card->dapm_mutex);
4008 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4011 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4012 * @dapm: DAPM context
4015 * Enables input/output pin regardless of any other state. This is
4016 * intended for use with microphone bias supplies used in microphone
4019 * Requires external locking.
4021 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4022 * do any widget power switching.
4024 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4027 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4030 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4034 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4035 if (!w->connected) {
4037 * w->force does not affect the number of input or output paths,
4038 * so we only have to recheck if w->connected is changed
4040 dapm_widget_invalidate_input_paths(w);
4041 dapm_widget_invalidate_output_paths(w);
4045 dapm_mark_dirty(w, "force enable");
4049 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4052 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4053 * @dapm: DAPM context
4056 * Enables input/output pin regardless of any other state. This is
4057 * intended for use with microphone bias supplies used in microphone
4060 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4061 * do any widget power switching.
4063 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4068 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4070 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4072 mutex_unlock(&dapm->card->dapm_mutex);
4076 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4079 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4080 * @dapm: DAPM context
4083 * Disables input/output pin and its parents or children widgets.
4085 * Requires external locking.
4087 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4088 * do any widget power switching.
4090 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4093 return snd_soc_dapm_set_pin(dapm, pin, 0);
4095 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4098 * snd_soc_dapm_disable_pin - disable pin.
4099 * @dapm: DAPM context
4102 * Disables input/output pin and its parents or children widgets.
4104 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4105 * do any widget power switching.
4107 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4112 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4114 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4116 mutex_unlock(&dapm->card->dapm_mutex);
4120 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4123 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4124 * @dapm: DAPM context
4127 * Marks the specified pin as being not connected, disabling it along
4128 * any parent or child widgets. At present this is identical to
4129 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4130 * additional things such as disabling controls which only affect
4131 * paths through the pin.
4133 * Requires external locking.
4135 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4136 * do any widget power switching.
4138 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4141 return snd_soc_dapm_set_pin(dapm, pin, 0);
4143 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4146 * snd_soc_dapm_nc_pin - permanently disable pin.
4147 * @dapm: DAPM context
4150 * Marks the specified pin as being not connected, disabling it along
4151 * any parent or child widgets. At present this is identical to
4152 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4153 * additional things such as disabling controls which only affect
4154 * paths through the pin.
4156 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4157 * do any widget power switching.
4159 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4163 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4165 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4167 mutex_unlock(&dapm->card->dapm_mutex);
4171 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4174 * snd_soc_dapm_get_pin_status - get audio pin status
4175 * @dapm: DAPM context
4176 * @pin: audio signal pin endpoint (or start point)
4178 * Get audio pin status - connected or disconnected.
4180 * Returns 1 for connected otherwise 0.
4182 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4185 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4188 return w->connected;
4192 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4195 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4196 * @dapm: DAPM context
4197 * @pin: audio signal pin endpoint (or start point)
4199 * Mark the given endpoint or pin as ignoring suspend. When the
4200 * system is disabled a path between two endpoints flagged as ignoring
4201 * suspend will not be disabled. The path must already be enabled via
4202 * normal means at suspend time, it will not be turned on if it was not
4205 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4208 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4211 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4215 w->ignore_suspend = 1;
4219 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4222 * snd_soc_dapm_free - free dapm resources
4223 * @dapm: DAPM context
4225 * Free all dapm widgets and resources.
4227 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4229 dapm_debugfs_cleanup(dapm);
4230 dapm_free_widgets(dapm);
4231 list_del(&dapm->list);
4233 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4235 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4237 struct snd_soc_card *card = dapm->card;
4238 struct snd_soc_dapm_widget *w;
4239 LIST_HEAD(down_list);
4242 mutex_lock(&card->dapm_mutex);
4244 list_for_each_entry(w, &dapm->card->widgets, list) {
4245 if (w->dapm != dapm)
4248 dapm_seq_insert(w, &down_list, false);
4254 /* If there were no widgets to power down we're already in
4258 if (dapm->bias_level == SND_SOC_BIAS_ON)
4259 snd_soc_dapm_set_bias_level(dapm,
4260 SND_SOC_BIAS_PREPARE);
4261 dapm_seq_run(card, &down_list, 0, false);
4262 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4263 snd_soc_dapm_set_bias_level(dapm,
4264 SND_SOC_BIAS_STANDBY);
4267 mutex_unlock(&card->dapm_mutex);
4271 * snd_soc_dapm_shutdown - callback for system shutdown
4273 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4275 struct snd_soc_dapm_context *dapm;
4277 list_for_each_entry(dapm, &card->dapm_list, list) {
4278 if (dapm != &card->dapm) {
4279 soc_dapm_shutdown_dapm(dapm);
4280 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4281 snd_soc_dapm_set_bias_level(dapm,
4286 soc_dapm_shutdown_dapm(&card->dapm);
4287 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4288 snd_soc_dapm_set_bias_level(&card->dapm,
4292 /* Module information */
4293 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4294 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4295 MODULE_LICENSE("GPL");