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/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/initval.h>
48 #include <trace/events/asoc.h>
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_aif_in] = 3,
56 [snd_soc_dapm_aif_out] = 3,
57 [snd_soc_dapm_mic] = 4,
58 [snd_soc_dapm_mux] = 5,
59 [snd_soc_dapm_virt_mux] = 5,
60 [snd_soc_dapm_value_mux] = 5,
61 [snd_soc_dapm_dac] = 6,
62 [snd_soc_dapm_mixer] = 7,
63 [snd_soc_dapm_mixer_named_ctl] = 7,
64 [snd_soc_dapm_pga] = 8,
65 [snd_soc_dapm_adc] = 9,
66 [snd_soc_dapm_out_drv] = 10,
67 [snd_soc_dapm_hp] = 10,
68 [snd_soc_dapm_spk] = 10,
69 [snd_soc_dapm_post] = 11,
72 static int dapm_down_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_adc] = 1,
75 [snd_soc_dapm_hp] = 2,
76 [snd_soc_dapm_spk] = 2,
77 [snd_soc_dapm_out_drv] = 2,
78 [snd_soc_dapm_pga] = 4,
79 [snd_soc_dapm_mixer_named_ctl] = 5,
80 [snd_soc_dapm_mixer] = 5,
81 [snd_soc_dapm_dac] = 6,
82 [snd_soc_dapm_mic] = 7,
83 [snd_soc_dapm_micbias] = 8,
84 [snd_soc_dapm_mux] = 9,
85 [snd_soc_dapm_virt_mux] = 9,
86 [snd_soc_dapm_value_mux] = 9,
87 [snd_soc_dapm_aif_in] = 10,
88 [snd_soc_dapm_aif_out] = 10,
89 [snd_soc_dapm_supply] = 11,
90 [snd_soc_dapm_post] = 12,
93 static void pop_wait(u32 pop_time)
96 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
99 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
107 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
112 vsnprintf(buf, PAGE_SIZE, fmt, args);
113 dev_info(dev, "%s", buf);
119 /* create a new dapm widget */
120 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
121 const struct snd_soc_dapm_widget *_widget)
123 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
127 * snd_soc_dapm_set_bias_level - set the bias level for the system
128 * @card: audio device
129 * @level: level to configure
131 * Configure the bias (power) levels for the SoC audio device.
133 * Returns 0 for success else error.
135 static int snd_soc_dapm_set_bias_level(struct snd_soc_card *card,
136 struct snd_soc_dapm_context *dapm,
137 enum snd_soc_bias_level level)
142 case SND_SOC_BIAS_ON:
143 dev_dbg(dapm->dev, "Setting full bias\n");
145 case SND_SOC_BIAS_PREPARE:
146 dev_dbg(dapm->dev, "Setting bias prepare\n");
148 case SND_SOC_BIAS_STANDBY:
149 dev_dbg(dapm->dev, "Setting standby bias\n");
151 case SND_SOC_BIAS_OFF:
152 dev_dbg(dapm->dev, "Setting bias off\n");
155 dev_err(dapm->dev, "Setting invalid bias %d\n", level);
159 trace_snd_soc_bias_level_start(card, level);
161 if (card && card->set_bias_level)
162 ret = card->set_bias_level(card, level);
164 if (dapm->codec && dapm->codec->driver->set_bias_level)
165 ret = dapm->codec->driver->set_bias_level(dapm->codec, level);
167 dapm->bias_level = level;
170 if (card && card->set_bias_level_post)
171 ret = card->set_bias_level_post(card, level);
174 trace_snd_soc_bias_level_done(card, level);
179 /* set up initial codec paths */
180 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
181 struct snd_soc_dapm_path *p, int i)
184 case snd_soc_dapm_switch:
185 case snd_soc_dapm_mixer:
186 case snd_soc_dapm_mixer_named_ctl: {
188 struct soc_mixer_control *mc = (struct soc_mixer_control *)
189 w->kcontrols[i].private_value;
190 unsigned int reg = mc->reg;
191 unsigned int shift = mc->shift;
193 unsigned int mask = (1 << fls(max)) - 1;
194 unsigned int invert = mc->invert;
196 val = snd_soc_read(w->codec, reg);
197 val = (val >> shift) & mask;
199 if ((invert && !val) || (!invert && val))
205 case snd_soc_dapm_mux: {
206 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
207 int val, item, bitmask;
209 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
211 val = snd_soc_read(w->codec, e->reg);
212 item = (val >> e->shift_l) & (bitmask - 1);
215 for (i = 0; i < e->max; i++) {
216 if (!(strcmp(p->name, e->texts[i])) && item == i)
221 case snd_soc_dapm_virt_mux: {
222 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
225 /* since a virtual mux has no backing registers to
226 * decide which path to connect, it will try to match
227 * with the first enumeration. This is to ensure
228 * that the default mux choice (the first) will be
229 * correctly powered up during initialization.
231 if (!strcmp(p->name, e->texts[0]))
235 case snd_soc_dapm_value_mux: {
236 struct soc_enum *e = (struct soc_enum *)
237 w->kcontrols[i].private_value;
240 val = snd_soc_read(w->codec, e->reg);
241 val = (val >> e->shift_l) & e->mask;
242 for (item = 0; item < e->max; item++) {
243 if (val == e->values[item])
248 for (i = 0; i < e->max; i++) {
249 if (!(strcmp(p->name, e->texts[i])) && item == i)
254 /* does not effect routing - always connected */
255 case snd_soc_dapm_pga:
256 case snd_soc_dapm_out_drv:
257 case snd_soc_dapm_output:
258 case snd_soc_dapm_adc:
259 case snd_soc_dapm_input:
260 case snd_soc_dapm_dac:
261 case snd_soc_dapm_micbias:
262 case snd_soc_dapm_vmid:
263 case snd_soc_dapm_supply:
264 case snd_soc_dapm_aif_in:
265 case snd_soc_dapm_aif_out:
268 /* does effect routing - dynamically connected */
269 case snd_soc_dapm_hp:
270 case snd_soc_dapm_mic:
271 case snd_soc_dapm_spk:
272 case snd_soc_dapm_line:
273 case snd_soc_dapm_pre:
274 case snd_soc_dapm_post:
280 /* connect mux widget to its interconnecting audio paths */
281 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
282 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
283 struct snd_soc_dapm_path *path, const char *control_name,
284 const struct snd_kcontrol_new *kcontrol)
286 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
289 for (i = 0; i < e->max; i++) {
290 if (!(strcmp(control_name, e->texts[i]))) {
291 list_add(&path->list, &dapm->card->paths);
292 list_add(&path->list_sink, &dest->sources);
293 list_add(&path->list_source, &src->sinks);
294 path->name = (char*)e->texts[i];
295 dapm_set_path_status(dest, path, 0);
303 /* connect mixer widget to its interconnecting audio paths */
304 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
305 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
306 struct snd_soc_dapm_path *path, const char *control_name)
310 /* search for mixer kcontrol */
311 for (i = 0; i < dest->num_kcontrols; i++) {
312 if (!strcmp(control_name, dest->kcontrols[i].name)) {
313 list_add(&path->list, &dapm->card->paths);
314 list_add(&path->list_sink, &dest->sources);
315 list_add(&path->list_source, &src->sinks);
316 path->name = dest->kcontrols[i].name;
317 dapm_set_path_status(dest, path, i);
324 /* update dapm codec register bits */
325 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
328 unsigned int old, new;
329 struct snd_soc_codec *codec = widget->codec;
330 struct snd_soc_dapm_context *dapm = widget->dapm;
331 struct snd_soc_card *card = dapm->card;
333 /* check for valid widgets */
334 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
335 widget->id == snd_soc_dapm_output ||
336 widget->id == snd_soc_dapm_hp ||
337 widget->id == snd_soc_dapm_mic ||
338 widget->id == snd_soc_dapm_line ||
339 widget->id == snd_soc_dapm_spk)
342 power = widget->power;
344 power = (power ? 0:1);
346 old = snd_soc_read(codec, widget->reg);
347 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
351 pop_dbg(dapm->dev, card->pop_time,
352 "pop test %s : %s in %d ms\n",
353 widget->name, widget->power ? "on" : "off",
355 pop_wait(card->pop_time);
356 snd_soc_write(codec, widget->reg, new);
358 dev_dbg(dapm->dev, "reg %x old %x new %x change %d\n", widget->reg,
363 /* create new dapm mixer control */
364 static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
365 struct snd_soc_dapm_widget *w)
369 struct snd_soc_dapm_path *path;
370 struct snd_card *card = dapm->codec->card->snd_card;
373 for (i = 0; i < w->num_kcontrols; i++) {
376 list_for_each_entry(path, &w->sources, list_sink) {
378 /* mixer/mux paths name must match control name */
379 if (path->name != (char*)w->kcontrols[i].name)
382 /* add dapm control with long name.
383 * for dapm_mixer this is the concatenation of the
384 * mixer and kcontrol name.
385 * for dapm_mixer_named_ctl this is simply the
388 name_len = strlen(w->kcontrols[i].name) + 1;
389 if (w->id != snd_soc_dapm_mixer_named_ctl)
390 name_len += 1 + strlen(w->name);
392 path->long_name = kmalloc(name_len, GFP_KERNEL);
394 if (path->long_name == NULL)
399 snprintf(path->long_name, name_len, "%s %s",
400 w->name, w->kcontrols[i].name);
402 case snd_soc_dapm_mixer_named_ctl:
403 snprintf(path->long_name, name_len, "%s",
404 w->kcontrols[i].name);
408 path->long_name[name_len - 1] = '\0';
410 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
412 ret = snd_ctl_add(card, path->kcontrol);
415 "asoc: failed to add dapm kcontrol %s: %d\n",
416 path->long_name, ret);
417 kfree(path->long_name);
418 path->long_name = NULL;
426 /* create new dapm mux control */
427 static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
428 struct snd_soc_dapm_widget *w)
430 struct snd_soc_dapm_path *path = NULL;
431 struct snd_kcontrol *kcontrol;
432 struct snd_card *card = dapm->codec->card->snd_card;
435 if (!w->num_kcontrols) {
436 dev_err(dapm->dev, "asoc: mux %s has no controls\n", w->name);
440 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
441 ret = snd_ctl_add(card, kcontrol);
446 list_for_each_entry(path, &w->sources, list_sink)
447 path->kcontrol = kcontrol;
452 dev_err(dapm->dev, "asoc: failed to add kcontrol %s\n", w->name);
456 /* create new dapm volume control */
457 static int dapm_new_pga(struct snd_soc_dapm_context *dapm,
458 struct snd_soc_dapm_widget *w)
460 if (w->num_kcontrols)
461 dev_err(w->dapm->dev,
462 "asoc: PGA controls not supported: '%s'\n", w->name);
467 /* reset 'walked' bit for each dapm path */
468 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
470 struct snd_soc_dapm_path *p;
472 list_for_each_entry(p, &dapm->card->paths, list)
476 /* We implement power down on suspend by checking the power state of
477 * the ALSA card - when we are suspending the ALSA state for the card
480 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
482 int level = snd_power_get_state(widget->dapm->codec->card->snd_card);
485 case SNDRV_CTL_POWER_D3hot:
486 case SNDRV_CTL_POWER_D3cold:
487 if (widget->ignore_suspend)
488 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
490 return widget->ignore_suspend;
497 * Recursively check for a completed path to an active or physically connected
498 * output widget. Returns number of complete paths.
500 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
502 struct snd_soc_dapm_path *path;
505 if (widget->id == snd_soc_dapm_supply)
508 switch (widget->id) {
509 case snd_soc_dapm_adc:
510 case snd_soc_dapm_aif_out:
512 return snd_soc_dapm_suspend_check(widget);
517 if (widget->connected) {
518 /* connected pin ? */
519 if (widget->id == snd_soc_dapm_output && !widget->ext)
520 return snd_soc_dapm_suspend_check(widget);
522 /* connected jack or spk ? */
523 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
524 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
525 return snd_soc_dapm_suspend_check(widget);
528 list_for_each_entry(path, &widget->sinks, list_source) {
532 if (path->sink && path->connect) {
534 con += is_connected_output_ep(path->sink);
542 * Recursively check for a completed path to an active or physically connected
543 * input widget. Returns number of complete paths.
545 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
547 struct snd_soc_dapm_path *path;
550 if (widget->id == snd_soc_dapm_supply)
553 /* active stream ? */
554 switch (widget->id) {
555 case snd_soc_dapm_dac:
556 case snd_soc_dapm_aif_in:
558 return snd_soc_dapm_suspend_check(widget);
563 if (widget->connected) {
564 /* connected pin ? */
565 if (widget->id == snd_soc_dapm_input && !widget->ext)
566 return snd_soc_dapm_suspend_check(widget);
568 /* connected VMID/Bias for lower pops */
569 if (widget->id == snd_soc_dapm_vmid)
570 return snd_soc_dapm_suspend_check(widget);
572 /* connected jack ? */
573 if (widget->id == snd_soc_dapm_mic ||
574 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
575 return snd_soc_dapm_suspend_check(widget);
578 list_for_each_entry(path, &widget->sources, list_sink) {
582 if (path->source && path->connect) {
584 con += is_connected_input_ep(path->source);
592 * Handler for generic register modifier widget.
594 int dapm_reg_event(struct snd_soc_dapm_widget *w,
595 struct snd_kcontrol *kcontrol, int event)
599 if (SND_SOC_DAPM_EVENT_ON(event))
604 snd_soc_update_bits(w->codec, -(w->reg + 1),
605 w->mask << w->shift, val << w->shift);
609 EXPORT_SYMBOL_GPL(dapm_reg_event);
611 /* Standard power change method, used to apply power changes to most
614 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
618 /* call any power change event handlers */
620 dev_dbg(w->dapm->dev, "power %s event for %s flags %x\n",
621 w->power ? "on" : "off",
622 w->name, w->event_flags);
624 /* power up pre event */
625 if (w->power && w->event &&
626 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
627 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
632 /* power down pre event */
633 if (!w->power && w->event &&
634 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
635 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
642 /* power up post event */
643 if (w->power && w->event &&
644 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
646 NULL, SND_SOC_DAPM_POST_PMU);
651 /* power down post event */
652 if (!w->power && w->event &&
653 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
654 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
662 /* Generic check to see if a widget should be powered.
664 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->dapm);
670 out = is_connected_output_ep(w);
671 dapm_clear_walk(w->dapm);
672 return out != 0 && in != 0;
675 /* Check to see if an ADC has power */
676 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
681 in = is_connected_input_ep(w);
682 dapm_clear_walk(w->dapm);
685 return dapm_generic_check_power(w);
689 /* Check to see if a DAC has power */
690 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
695 out = is_connected_output_ep(w);
696 dapm_clear_walk(w->dapm);
699 return dapm_generic_check_power(w);
703 /* Check to see if a power supply is needed */
704 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
706 struct snd_soc_dapm_path *path;
709 /* Check if one of our outputs is connected */
710 list_for_each_entry(path, &w->sinks, list_source) {
711 if (path->connected &&
712 !path->connected(path->source, path->sink))
715 if (path->sink && path->sink->power_check &&
716 path->sink->power_check(path->sink)) {
722 dapm_clear_walk(w->dapm);
727 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
728 struct snd_soc_dapm_widget *b,
736 sort = dapm_down_seq;
738 if (sort[a->id] != sort[b->id])
739 return sort[a->id] - sort[b->id];
740 if (a->subseq != b->subseq) {
742 return a->subseq - b->subseq;
744 return b->subseq - a->subseq;
746 if (a->reg != b->reg)
747 return a->reg - b->reg;
748 if (a->dapm != b->dapm)
749 return (unsigned long)a->dapm - (unsigned long)b->dapm;
754 /* Insert a widget in order into a DAPM power sequence. */
755 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
756 struct list_head *list,
759 struct snd_soc_dapm_widget *w;
761 list_for_each_entry(w, list, power_list)
762 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
763 list_add_tail(&new_widget->power_list, &w->power_list);
767 list_add_tail(&new_widget->power_list, list);
770 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
771 struct snd_soc_dapm_widget *w, int event)
773 struct snd_soc_card *card = dapm->card;
778 case SND_SOC_DAPM_PRE_PMU:
782 case SND_SOC_DAPM_POST_PMU:
783 ev_name = "POST_PMU";
786 case SND_SOC_DAPM_PRE_PMD:
790 case SND_SOC_DAPM_POST_PMD:
791 ev_name = "POST_PMD";
799 if (w->power != power)
802 if (w->event && (w->event_flags & event)) {
803 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
805 trace_snd_soc_dapm_widget_event_start(w, event);
806 ret = w->event(w, NULL, event);
807 trace_snd_soc_dapm_widget_event_done(w, event);
809 pr_err("%s: %s event failed: %d\n",
810 ev_name, w->name, ret);
814 /* Apply the coalesced changes from a DAPM sequence */
815 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
816 struct list_head *pending)
818 struct snd_soc_card *card = dapm->card;
819 struct snd_soc_dapm_widget *w;
821 unsigned int value = 0;
822 unsigned int mask = 0;
823 unsigned int cur_mask;
825 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
828 list_for_each_entry(w, pending, power_list) {
829 cur_mask = 1 << w->shift;
830 BUG_ON(reg != w->reg);
841 pop_dbg(dapm->dev, card->pop_time,
842 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
843 w->name, reg, value, mask);
845 /* Check for events */
846 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
847 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
851 pop_dbg(dapm->dev, card->pop_time,
852 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
853 value, mask, reg, card->pop_time);
854 pop_wait(card->pop_time);
855 snd_soc_update_bits(dapm->codec, reg, mask, value);
858 list_for_each_entry(w, pending, power_list) {
859 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
860 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
864 /* Apply a DAPM power sequence.
866 * We walk over a pre-sorted list of widgets to apply power to. In
867 * order to minimise the number of writes to the device required
868 * multiple widgets will be updated in a single write where possible.
869 * Currently anything that requires more than a single write is not
872 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
873 struct list_head *list, int event, bool power_up)
875 struct snd_soc_dapm_widget *w, *n;
879 int cur_reg = SND_SOC_NOPM;
880 struct snd_soc_dapm_context *cur_dapm = NULL;
887 sort = dapm_down_seq;
889 list_for_each_entry_safe(w, n, list, power_list) {
892 /* Do we need to apply any queued changes? */
893 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
894 w->dapm != cur_dapm || w->subseq != cur_subseq) {
895 if (!list_empty(&pending))
896 dapm_seq_run_coalesced(cur_dapm, &pending);
898 if (cur_dapm && cur_dapm->seq_notifier) {
899 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
900 if (sort[i] == cur_sort)
901 cur_dapm->seq_notifier(cur_dapm,
906 INIT_LIST_HEAD(&pending);
909 cur_reg = SND_SOC_NOPM;
914 case snd_soc_dapm_pre:
916 list_for_each_entry_safe_continue(w, n, list,
919 if (event == SND_SOC_DAPM_STREAM_START)
921 NULL, SND_SOC_DAPM_PRE_PMU);
922 else if (event == SND_SOC_DAPM_STREAM_STOP)
924 NULL, SND_SOC_DAPM_PRE_PMD);
927 case snd_soc_dapm_post:
929 list_for_each_entry_safe_continue(w, n, list,
932 if (event == SND_SOC_DAPM_STREAM_START)
934 NULL, SND_SOC_DAPM_POST_PMU);
935 else if (event == SND_SOC_DAPM_STREAM_STOP)
937 NULL, SND_SOC_DAPM_POST_PMD);
940 case snd_soc_dapm_input:
941 case snd_soc_dapm_output:
942 case snd_soc_dapm_hp:
943 case snd_soc_dapm_mic:
944 case snd_soc_dapm_line:
945 case snd_soc_dapm_spk:
946 /* No register support currently */
947 ret = dapm_generic_apply_power(w);
951 /* Queue it up for application */
952 cur_sort = sort[w->id];
953 cur_subseq = w->subseq;
956 list_move(&w->power_list, &pending);
961 dev_err(w->dapm->dev,
962 "Failed to apply widget power: %d\n", ret);
965 if (!list_empty(&pending))
966 dapm_seq_run_coalesced(dapm, &pending);
968 if (cur_dapm && cur_dapm->seq_notifier) {
969 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
970 if (sort[i] == cur_sort)
971 cur_dapm->seq_notifier(cur_dapm,
976 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
978 struct snd_soc_dapm_update *update = dapm->update;
979 struct snd_soc_dapm_widget *w;
988 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
989 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
991 pr_err("%s DAPM pre-event failed: %d\n",
995 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
998 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1001 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1002 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1004 pr_err("%s DAPM post-event failed: %d\n",
1012 * Scan each dapm widget for complete audio path.
1013 * A complete path is a route that has valid endpoints i.e.:-
1015 * o DAC to output pin.
1016 * o Input Pin to ADC.
1017 * o Input pin to Output pin (bypass, sidetone)
1018 * o DAC to ADC (loopback).
1020 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1022 struct snd_soc_card *card = dapm->codec->card;
1023 struct snd_soc_dapm_widget *w;
1024 struct snd_soc_dapm_context *d;
1026 LIST_HEAD(down_list);
1030 trace_snd_soc_dapm_start(card);
1032 list_for_each_entry(d, &card->dapm_list, list)
1036 /* Check which widgets we need to power and store them in
1037 * lists indicating if they should be powered up or down.
1039 list_for_each_entry(w, &card->widgets, list) {
1041 case snd_soc_dapm_pre:
1042 dapm_seq_insert(w, &down_list, false);
1044 case snd_soc_dapm_post:
1045 dapm_seq_insert(w, &up_list, true);
1049 if (!w->power_check)
1053 power = w->power_check(w);
1057 w->dapm->dev_power = 1;
1059 if (w->power == power)
1062 trace_snd_soc_dapm_widget_power(w, power);
1065 dapm_seq_insert(w, &up_list, true);
1067 dapm_seq_insert(w, &down_list, false);
1074 /* If there are no DAPM widgets then try to figure out power from the
1077 if (!dapm->n_widgets) {
1079 case SND_SOC_DAPM_STREAM_START:
1080 case SND_SOC_DAPM_STREAM_RESUME:
1081 dapm->dev_power = 1;
1083 case SND_SOC_DAPM_STREAM_STOP:
1084 dapm->dev_power = !!dapm->codec->active;
1086 case SND_SOC_DAPM_STREAM_SUSPEND:
1087 dapm->dev_power = 0;
1089 case SND_SOC_DAPM_STREAM_NOP:
1090 switch (dapm->bias_level) {
1091 case SND_SOC_BIAS_STANDBY:
1092 case SND_SOC_BIAS_OFF:
1093 dapm->dev_power = 0;
1096 dapm->dev_power = 1;
1105 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1106 if (d->dev_power && d->bias_level == SND_SOC_BIAS_OFF) {
1107 ret = snd_soc_dapm_set_bias_level(card, d,
1108 SND_SOC_BIAS_STANDBY);
1111 "Failed to turn on bias: %d\n", ret);
1114 /* If we're changing to all on or all off then prepare */
1115 if ((d->dev_power && d->bias_level == SND_SOC_BIAS_STANDBY) ||
1116 (!d->dev_power && d->bias_level == SND_SOC_BIAS_ON)) {
1117 ret = snd_soc_dapm_set_bias_level(card, d,
1118 SND_SOC_BIAS_PREPARE);
1121 "Failed to prepare bias: %d\n", ret);
1125 /* Power down widgets first; try to avoid amplifying pops. */
1126 dapm_seq_run(dapm, &down_list, event, false);
1128 dapm_widget_update(dapm);
1131 dapm_seq_run(dapm, &up_list, event, true);
1133 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1134 /* If we just powered the last thing off drop to standby bias */
1135 if (d->bias_level == SND_SOC_BIAS_PREPARE && !d->dev_power) {
1136 ret = snd_soc_dapm_set_bias_level(card, d,
1137 SND_SOC_BIAS_STANDBY);
1140 "Failed to apply standby bias: %d\n",
1144 /* If we're in standby and can support bias off then do that */
1145 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1147 ret = snd_soc_dapm_set_bias_level(card, d,
1151 "Failed to turn off bias: %d\n", ret);
1154 /* If we just powered up then move to active bias */
1155 if (d->bias_level == SND_SOC_BIAS_PREPARE && d->dev_power) {
1156 ret = snd_soc_dapm_set_bias_level(card, d,
1160 "Failed to apply active bias: %d\n",
1165 pop_dbg(dapm->dev, card->pop_time,
1166 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1167 pop_wait(card->pop_time);
1169 trace_snd_soc_dapm_done(card);
1174 #ifdef CONFIG_DEBUG_FS
1175 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1177 file->private_data = inode->i_private;
1181 static ssize_t dapm_widget_power_read_file(struct file *file,
1182 char __user *user_buf,
1183 size_t count, loff_t *ppos)
1185 struct snd_soc_dapm_widget *w = file->private_data;
1189 struct snd_soc_dapm_path *p = NULL;
1191 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1195 in = is_connected_input_ep(w);
1196 dapm_clear_walk(w->dapm);
1197 out = is_connected_output_ep(w);
1198 dapm_clear_walk(w->dapm);
1200 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1201 w->name, w->power ? "On" : "Off", in, out);
1204 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1205 " - R%d(0x%x) bit %d",
1206 w->reg, w->reg, w->shift);
1208 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1211 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1213 w->active ? "active" : "inactive");
1215 list_for_each_entry(p, &w->sources, list_sink) {
1216 if (p->connected && !p->connected(w, p->sink))
1220 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1222 p->name ? p->name : "static",
1225 list_for_each_entry(p, &w->sinks, list_source) {
1226 if (p->connected && !p->connected(w, p->sink))
1230 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1232 p->name ? p->name : "static",
1236 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1242 static const struct file_operations dapm_widget_power_fops = {
1243 .open = dapm_widget_power_open_file,
1244 .read = dapm_widget_power_read_file,
1245 .llseek = default_llseek,
1248 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1250 struct snd_soc_dapm_widget *w;
1253 if (!dapm->debugfs_dapm)
1256 list_for_each_entry(w, &dapm->card->widgets, list) {
1257 if (!w->name || w->dapm != dapm)
1260 d = debugfs_create_file(w->name, 0444,
1261 dapm->debugfs_dapm, w,
1262 &dapm_widget_power_fops);
1264 dev_warn(w->dapm->dev,
1265 "ASoC: Failed to create %s debugfs file\n",
1270 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1275 /* test and update the power status of a mux widget */
1276 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1277 struct snd_kcontrol *kcontrol, int change,
1278 int mux, struct soc_enum *e)
1280 struct snd_soc_dapm_path *path;
1283 if (widget->id != snd_soc_dapm_mux &&
1284 widget->id != snd_soc_dapm_virt_mux &&
1285 widget->id != snd_soc_dapm_value_mux)
1291 /* find dapm widget path assoc with kcontrol */
1292 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1293 if (path->kcontrol != kcontrol)
1296 if (!path->name || !e->texts[mux])
1300 /* we now need to match the string in the enum to the path */
1301 if (!(strcmp(path->name, e->texts[mux])))
1302 path->connect = 1; /* new connection */
1304 path->connect = 0; /* old connection must be powered down */
1308 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1313 /* test and update the power status of a mixer or switch widget */
1314 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1315 struct snd_kcontrol *kcontrol, int connect)
1317 struct snd_soc_dapm_path *path;
1320 if (widget->id != snd_soc_dapm_mixer &&
1321 widget->id != snd_soc_dapm_mixer_named_ctl &&
1322 widget->id != snd_soc_dapm_switch)
1325 /* find dapm widget path assoc with kcontrol */
1326 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1327 if (path->kcontrol != kcontrol)
1330 /* found, now check type */
1332 path->connect = connect;
1337 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1342 /* show dapm widget status in sys fs */
1343 static ssize_t dapm_widget_show(struct device *dev,
1344 struct device_attribute *attr, char *buf)
1346 struct snd_soc_pcm_runtime *rtd =
1347 container_of(dev, struct snd_soc_pcm_runtime, dev);
1348 struct snd_soc_codec *codec =rtd->codec;
1349 struct snd_soc_dapm_widget *w;
1351 char *state = "not set";
1353 list_for_each_entry(w, &codec->card->widgets, list) {
1354 if (w->dapm != &codec->dapm)
1357 /* only display widgets that burnm power */
1359 case snd_soc_dapm_hp:
1360 case snd_soc_dapm_mic:
1361 case snd_soc_dapm_spk:
1362 case snd_soc_dapm_line:
1363 case snd_soc_dapm_micbias:
1364 case snd_soc_dapm_dac:
1365 case snd_soc_dapm_adc:
1366 case snd_soc_dapm_pga:
1367 case snd_soc_dapm_out_drv:
1368 case snd_soc_dapm_mixer:
1369 case snd_soc_dapm_mixer_named_ctl:
1370 case snd_soc_dapm_supply:
1372 count += sprintf(buf + count, "%s: %s\n",
1373 w->name, w->power ? "On":"Off");
1380 switch (codec->dapm.bias_level) {
1381 case SND_SOC_BIAS_ON:
1384 case SND_SOC_BIAS_PREPARE:
1387 case SND_SOC_BIAS_STANDBY:
1390 case SND_SOC_BIAS_OFF:
1394 count += sprintf(buf + count, "PM State: %s\n", state);
1399 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1401 int snd_soc_dapm_sys_add(struct device *dev)
1403 return device_create_file(dev, &dev_attr_dapm_widget);
1406 static void snd_soc_dapm_sys_remove(struct device *dev)
1408 device_remove_file(dev, &dev_attr_dapm_widget);
1411 /* free all dapm widgets and resources */
1412 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1414 struct snd_soc_dapm_widget *w, *next_w;
1415 struct snd_soc_dapm_path *p, *next_p;
1417 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1418 if (w->dapm != dapm)
1422 * remove source and sink paths associated to this widget.
1423 * While removing the path, remove reference to it from both
1424 * source and sink widgets so that path is removed only once.
1426 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1427 list_del(&p->list_sink);
1428 list_del(&p->list_source);
1430 kfree(p->long_name);
1433 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1434 list_del(&p->list_sink);
1435 list_del(&p->list_source);
1437 kfree(p->long_name);
1445 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1446 const char *pin, int status)
1448 struct snd_soc_dapm_widget *w;
1450 list_for_each_entry(w, &dapm->card->widgets, list) {
1451 if (w->dapm != dapm)
1453 if (!strcmp(w->name, pin)) {
1454 dev_dbg(w->dapm->dev, "dapm: pin %s = %d\n",
1456 w->connected = status;
1457 /* Allow disabling of forced pins */
1464 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1469 * snd_soc_dapm_sync - scan and power dapm paths
1470 * @dapm: DAPM context
1472 * Walks all dapm audio paths and powers widgets according to their
1473 * stream or path usage.
1475 * Returns 0 for success.
1477 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1479 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1481 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1483 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1484 const struct snd_soc_dapm_route *route)
1486 struct snd_soc_dapm_path *path;
1487 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1488 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1490 const char *control = route->control;
1492 char prefixed_sink[80];
1493 char prefixed_source[80];
1496 if (dapm->codec->name_prefix) {
1497 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1498 dapm->codec->name_prefix, route->sink);
1499 sink = prefixed_sink;
1500 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1501 dapm->codec->name_prefix, route->source);
1502 source = prefixed_source;
1505 source = route->source;
1509 * find src and dest widgets over all widgets but favor a widget from
1510 * current DAPM context
1512 list_for_each_entry(w, &dapm->card->widgets, list) {
1513 if (!wsink && !(strcmp(w->name, sink))) {
1515 if (w->dapm == dapm)
1519 if (!wsource && !(strcmp(w->name, source))) {
1521 if (w->dapm == dapm)
1525 /* use widget from another DAPM context if not found from this */
1531 if (wsource == NULL || wsink == NULL)
1534 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1538 path->source = wsource;
1540 path->connected = route->connected;
1541 INIT_LIST_HEAD(&path->list);
1542 INIT_LIST_HEAD(&path->list_source);
1543 INIT_LIST_HEAD(&path->list_sink);
1545 /* check for external widgets */
1546 if (wsink->id == snd_soc_dapm_input) {
1547 if (wsource->id == snd_soc_dapm_micbias ||
1548 wsource->id == snd_soc_dapm_mic ||
1549 wsource->id == snd_soc_dapm_line ||
1550 wsource->id == snd_soc_dapm_output)
1553 if (wsource->id == snd_soc_dapm_output) {
1554 if (wsink->id == snd_soc_dapm_spk ||
1555 wsink->id == snd_soc_dapm_hp ||
1556 wsink->id == snd_soc_dapm_line ||
1557 wsink->id == snd_soc_dapm_input)
1561 /* connect static paths */
1562 if (control == NULL) {
1563 list_add(&path->list, &dapm->card->paths);
1564 list_add(&path->list_sink, &wsink->sources);
1565 list_add(&path->list_source, &wsource->sinks);
1570 /* connect dynamic paths */
1572 case snd_soc_dapm_adc:
1573 case snd_soc_dapm_dac:
1574 case snd_soc_dapm_pga:
1575 case snd_soc_dapm_out_drv:
1576 case snd_soc_dapm_input:
1577 case snd_soc_dapm_output:
1578 case snd_soc_dapm_micbias:
1579 case snd_soc_dapm_vmid:
1580 case snd_soc_dapm_pre:
1581 case snd_soc_dapm_post:
1582 case snd_soc_dapm_supply:
1583 case snd_soc_dapm_aif_in:
1584 case snd_soc_dapm_aif_out:
1585 list_add(&path->list, &dapm->card->paths);
1586 list_add(&path->list_sink, &wsink->sources);
1587 list_add(&path->list_source, &wsource->sinks);
1590 case snd_soc_dapm_mux:
1591 case snd_soc_dapm_virt_mux:
1592 case snd_soc_dapm_value_mux:
1593 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1594 &wsink->kcontrols[0]);
1598 case snd_soc_dapm_switch:
1599 case snd_soc_dapm_mixer:
1600 case snd_soc_dapm_mixer_named_ctl:
1601 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1605 case snd_soc_dapm_hp:
1606 case snd_soc_dapm_mic:
1607 case snd_soc_dapm_line:
1608 case snd_soc_dapm_spk:
1609 list_add(&path->list, &dapm->card->paths);
1610 list_add(&path->list_sink, &wsink->sources);
1611 list_add(&path->list_source, &wsource->sinks);
1618 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1619 source, control, sink);
1625 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1626 * @dapm: DAPM context
1627 * @route: audio routes
1628 * @num: number of routes
1630 * Connects 2 dapm widgets together via a named audio path. The sink is
1631 * the widget receiving the audio signal, whilst the source is the sender
1632 * of the audio signal.
1634 * Returns 0 for success else error. On error all resources can be freed
1635 * with a call to snd_soc_card_free().
1637 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1638 const struct snd_soc_dapm_route *route, int num)
1642 for (i = 0; i < num; i++) {
1643 ret = snd_soc_dapm_add_route(dapm, route);
1645 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1646 route->source, route->sink);
1654 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1657 * snd_soc_dapm_new_widgets - add new dapm widgets
1658 * @dapm: DAPM context
1660 * Checks the codec for any new dapm widgets and creates them if found.
1662 * Returns 0 for success.
1664 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1666 struct snd_soc_dapm_widget *w;
1668 list_for_each_entry(w, &dapm->card->widgets, list)
1674 case snd_soc_dapm_switch:
1675 case snd_soc_dapm_mixer:
1676 case snd_soc_dapm_mixer_named_ctl:
1677 w->power_check = dapm_generic_check_power;
1678 dapm_new_mixer(dapm, w);
1680 case snd_soc_dapm_mux:
1681 case snd_soc_dapm_virt_mux:
1682 case snd_soc_dapm_value_mux:
1683 w->power_check = dapm_generic_check_power;
1684 dapm_new_mux(dapm, w);
1686 case snd_soc_dapm_adc:
1687 case snd_soc_dapm_aif_out:
1688 w->power_check = dapm_adc_check_power;
1690 case snd_soc_dapm_dac:
1691 case snd_soc_dapm_aif_in:
1692 w->power_check = dapm_dac_check_power;
1694 case snd_soc_dapm_pga:
1695 case snd_soc_dapm_out_drv:
1696 w->power_check = dapm_generic_check_power;
1697 dapm_new_pga(dapm, w);
1699 case snd_soc_dapm_input:
1700 case snd_soc_dapm_output:
1701 case snd_soc_dapm_micbias:
1702 case snd_soc_dapm_spk:
1703 case snd_soc_dapm_hp:
1704 case snd_soc_dapm_mic:
1705 case snd_soc_dapm_line:
1706 w->power_check = dapm_generic_check_power;
1708 case snd_soc_dapm_supply:
1709 w->power_check = dapm_supply_check_power;
1710 case snd_soc_dapm_vmid:
1711 case snd_soc_dapm_pre:
1712 case snd_soc_dapm_post:
1718 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1721 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1724 * snd_soc_dapm_get_volsw - dapm mixer get callback
1725 * @kcontrol: mixer control
1726 * @ucontrol: control element information
1728 * Callback to get the value of a dapm mixer control.
1730 * Returns 0 for success.
1732 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1733 struct snd_ctl_elem_value *ucontrol)
1735 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1736 struct soc_mixer_control *mc =
1737 (struct soc_mixer_control *)kcontrol->private_value;
1738 unsigned int reg = mc->reg;
1739 unsigned int shift = mc->shift;
1740 unsigned int rshift = mc->rshift;
1742 unsigned int invert = mc->invert;
1743 unsigned int mask = (1 << fls(max)) - 1;
1745 ucontrol->value.integer.value[0] =
1746 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1747 if (shift != rshift)
1748 ucontrol->value.integer.value[1] =
1749 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1751 ucontrol->value.integer.value[0] =
1752 max - ucontrol->value.integer.value[0];
1753 if (shift != rshift)
1754 ucontrol->value.integer.value[1] =
1755 max - ucontrol->value.integer.value[1];
1760 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1763 * snd_soc_dapm_put_volsw - dapm mixer set callback
1764 * @kcontrol: mixer control
1765 * @ucontrol: control element information
1767 * Callback to set the value of a dapm mixer control.
1769 * Returns 0 for success.
1771 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1772 struct snd_ctl_elem_value *ucontrol)
1774 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1775 struct soc_mixer_control *mc =
1776 (struct soc_mixer_control *)kcontrol->private_value;
1777 unsigned int reg = mc->reg;
1778 unsigned int shift = mc->shift;
1780 unsigned int mask = (1 << fls(max)) - 1;
1781 unsigned int invert = mc->invert;
1783 int connect, change;
1784 struct snd_soc_dapm_update update;
1786 val = (ucontrol->value.integer.value[0] & mask);
1790 mask = mask << shift;
1793 mutex_lock(&widget->codec->mutex);
1794 widget->value = val;
1796 change = snd_soc_test_bits(widget->codec, reg, mask, val);
1799 /* new connection */
1800 connect = invert ? 0:1;
1802 /* old connection must be powered down */
1803 connect = invert ? 1:0;
1805 update.kcontrol = kcontrol;
1806 update.widget = widget;
1810 widget->dapm->update = &update;
1812 dapm_mixer_update_power(widget, kcontrol, connect);
1814 widget->dapm->update = NULL;
1817 mutex_unlock(&widget->codec->mutex);
1820 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1823 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1824 * @kcontrol: mixer control
1825 * @ucontrol: control element information
1827 * Callback to get the value of a dapm enumerated double mixer control.
1829 * Returns 0 for success.
1831 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1832 struct snd_ctl_elem_value *ucontrol)
1834 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1835 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1836 unsigned int val, bitmask;
1838 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1840 val = snd_soc_read(widget->codec, e->reg);
1841 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1842 if (e->shift_l != e->shift_r)
1843 ucontrol->value.enumerated.item[1] =
1844 (val >> e->shift_r) & (bitmask - 1);
1848 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1851 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1852 * @kcontrol: mixer control
1853 * @ucontrol: control element information
1855 * Callback to set the value of a dapm enumerated double mixer control.
1857 * Returns 0 for success.
1859 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1860 struct snd_ctl_elem_value *ucontrol)
1862 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1863 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1864 unsigned int val, mux, change;
1865 unsigned int mask, bitmask;
1866 struct snd_soc_dapm_update update;
1868 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1870 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1872 mux = ucontrol->value.enumerated.item[0];
1873 val = mux << e->shift_l;
1874 mask = (bitmask - 1) << e->shift_l;
1875 if (e->shift_l != e->shift_r) {
1876 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1878 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1879 mask |= (bitmask - 1) << e->shift_r;
1882 mutex_lock(&widget->codec->mutex);
1883 widget->value = val;
1884 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1886 update.kcontrol = kcontrol;
1887 update.widget = widget;
1888 update.reg = e->reg;
1891 widget->dapm->update = &update;
1893 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1895 widget->dapm->update = NULL;
1897 mutex_unlock(&widget->codec->mutex);
1900 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1903 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1904 * @kcontrol: mixer control
1905 * @ucontrol: control element information
1907 * Returns 0 for success.
1909 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1910 struct snd_ctl_elem_value *ucontrol)
1912 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1914 ucontrol->value.enumerated.item[0] = widget->value;
1918 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1921 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1922 * @kcontrol: mixer control
1923 * @ucontrol: control element information
1925 * Returns 0 for success.
1927 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1928 struct snd_ctl_elem_value *ucontrol)
1930 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1931 struct soc_enum *e =
1932 (struct soc_enum *)kcontrol->private_value;
1936 if (ucontrol->value.enumerated.item[0] >= e->max)
1939 mutex_lock(&widget->codec->mutex);
1941 change = widget->value != ucontrol->value.enumerated.item[0];
1942 widget->value = ucontrol->value.enumerated.item[0];
1943 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1945 mutex_unlock(&widget->codec->mutex);
1948 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1951 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1953 * @kcontrol: mixer control
1954 * @ucontrol: control element information
1956 * Callback to get the value of a dapm semi enumerated double mixer control.
1958 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1959 * used for handling bitfield coded enumeration for example.
1961 * Returns 0 for success.
1963 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1964 struct snd_ctl_elem_value *ucontrol)
1966 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1967 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1968 unsigned int reg_val, val, mux;
1970 reg_val = snd_soc_read(widget->codec, e->reg);
1971 val = (reg_val >> e->shift_l) & e->mask;
1972 for (mux = 0; mux < e->max; mux++) {
1973 if (val == e->values[mux])
1976 ucontrol->value.enumerated.item[0] = mux;
1977 if (e->shift_l != e->shift_r) {
1978 val = (reg_val >> e->shift_r) & e->mask;
1979 for (mux = 0; mux < e->max; mux++) {
1980 if (val == e->values[mux])
1983 ucontrol->value.enumerated.item[1] = mux;
1988 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1991 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1993 * @kcontrol: mixer control
1994 * @ucontrol: control element information
1996 * Callback to set the value of a dapm semi enumerated double mixer control.
1998 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1999 * used for handling bitfield coded enumeration for example.
2001 * Returns 0 for success.
2003 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2004 struct snd_ctl_elem_value *ucontrol)
2006 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
2007 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2008 unsigned int val, mux, change;
2010 struct snd_soc_dapm_update update;
2012 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2014 mux = ucontrol->value.enumerated.item[0];
2015 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2016 mask = e->mask << e->shift_l;
2017 if (e->shift_l != e->shift_r) {
2018 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2020 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2021 mask |= e->mask << e->shift_r;
2024 mutex_lock(&widget->codec->mutex);
2025 widget->value = val;
2026 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2028 update.kcontrol = kcontrol;
2029 update.widget = widget;
2030 update.reg = e->reg;
2033 widget->dapm->update = &update;
2035 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2037 widget->dapm->update = NULL;
2039 mutex_unlock(&widget->codec->mutex);
2042 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2045 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2047 * @kcontrol: mixer control
2048 * @uinfo: control element information
2050 * Callback to provide information about a pin switch control.
2052 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2053 struct snd_ctl_elem_info *uinfo)
2055 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2057 uinfo->value.integer.min = 0;
2058 uinfo->value.integer.max = 1;
2062 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2065 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2067 * @kcontrol: mixer control
2070 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2071 struct snd_ctl_elem_value *ucontrol)
2073 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2074 const char *pin = (const char *)kcontrol->private_value;
2076 mutex_lock(&codec->mutex);
2078 ucontrol->value.integer.value[0] =
2079 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2081 mutex_unlock(&codec->mutex);
2085 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2088 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2090 * @kcontrol: mixer control
2093 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2094 struct snd_ctl_elem_value *ucontrol)
2096 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2097 const char *pin = (const char *)kcontrol->private_value;
2099 mutex_lock(&codec->mutex);
2101 if (ucontrol->value.integer.value[0])
2102 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2104 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2106 snd_soc_dapm_sync(&codec->dapm);
2108 mutex_unlock(&codec->mutex);
2112 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2115 * snd_soc_dapm_new_control - create new dapm control
2116 * @dapm: DAPM context
2117 * @widget: widget template
2119 * Creates a new dapm control based upon the template.
2121 * Returns 0 for success else error.
2123 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2124 const struct snd_soc_dapm_widget *widget)
2126 struct snd_soc_dapm_widget *w;
2129 if ((w = dapm_cnew_widget(widget)) == NULL)
2132 name_len = strlen(widget->name) + 1;
2133 if (dapm->codec->name_prefix)
2134 name_len += 1 + strlen(dapm->codec->name_prefix);
2135 w->name = kmalloc(name_len, GFP_KERNEL);
2136 if (w->name == NULL) {
2140 if (dapm->codec->name_prefix)
2141 snprintf(w->name, name_len, "%s %s",
2142 dapm->codec->name_prefix, widget->name);
2144 snprintf(w->name, name_len, "%s", widget->name);
2148 w->codec = dapm->codec;
2149 INIT_LIST_HEAD(&w->sources);
2150 INIT_LIST_HEAD(&w->sinks);
2151 INIT_LIST_HEAD(&w->list);
2152 list_add(&w->list, &dapm->card->widgets);
2154 /* machine layer set ups unconnected pins and insertions */
2158 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2161 * snd_soc_dapm_new_controls - create new dapm controls
2162 * @dapm: DAPM context
2163 * @widget: widget array
2164 * @num: number of widgets
2166 * Creates new DAPM controls based upon the templates.
2168 * Returns 0 for success else error.
2170 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2171 const struct snd_soc_dapm_widget *widget,
2176 for (i = 0; i < num; i++) {
2177 ret = snd_soc_dapm_new_control(dapm, widget);
2180 "ASoC: Failed to create DAPM control %s: %d\n",
2188 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2190 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2191 const char *stream, int event)
2193 struct snd_soc_dapm_widget *w;
2195 list_for_each_entry(w, &dapm->card->widgets, list)
2197 if (!w->sname || w->dapm != dapm)
2199 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2200 w->name, w->sname, stream, event);
2201 if (strstr(w->sname, stream)) {
2203 case SND_SOC_DAPM_STREAM_START:
2206 case SND_SOC_DAPM_STREAM_STOP:
2209 case SND_SOC_DAPM_STREAM_SUSPEND:
2210 case SND_SOC_DAPM_STREAM_RESUME:
2211 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2212 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2218 dapm_power_widgets(dapm, event);
2222 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2223 * @rtd: PCM runtime data
2224 * @stream: stream name
2225 * @event: stream event
2227 * Sends a stream event to the dapm core. The core then makes any
2228 * necessary widget power changes.
2230 * Returns 0 for success else error.
2232 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2233 const char *stream, int event)
2235 struct snd_soc_codec *codec = rtd->codec;
2240 mutex_lock(&codec->mutex);
2241 soc_dapm_stream_event(&codec->dapm, stream, event);
2242 mutex_unlock(&codec->mutex);
2245 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2248 * snd_soc_dapm_enable_pin - enable pin.
2249 * @dapm: DAPM context
2252 * Enables input/output pin and its parents or children widgets iff there is
2253 * a valid audio route and active audio stream.
2254 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2255 * do any widget power switching.
2257 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2259 return snd_soc_dapm_set_pin(dapm, pin, 1);
2261 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2264 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2265 * @dapm: DAPM context
2268 * Enables input/output pin regardless of any other state. This is
2269 * intended for use with microphone bias supplies used in microphone
2272 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2273 * do any widget power switching.
2275 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2278 struct snd_soc_dapm_widget *w;
2280 list_for_each_entry(w, &dapm->card->widgets, list) {
2281 if (w->dapm != dapm)
2283 if (!strcmp(w->name, pin)) {
2284 dev_dbg(w->dapm->dev,
2285 "dapm: force enable pin %s\n", pin);
2292 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2295 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2298 * snd_soc_dapm_disable_pin - disable pin.
2299 * @dapm: DAPM context
2302 * Disables input/output pin and its parents or children widgets.
2303 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2304 * do any widget power switching.
2306 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2309 return snd_soc_dapm_set_pin(dapm, pin, 0);
2311 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2314 * snd_soc_dapm_nc_pin - permanently disable pin.
2315 * @dapm: DAPM context
2318 * Marks the specified pin as being not connected, disabling it along
2319 * any parent or child widgets. At present this is identical to
2320 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2321 * additional things such as disabling controls which only affect
2322 * paths through the pin.
2324 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2325 * do any widget power switching.
2327 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2329 return snd_soc_dapm_set_pin(dapm, pin, 0);
2331 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2334 * snd_soc_dapm_get_pin_status - get audio pin status
2335 * @dapm: DAPM context
2336 * @pin: audio signal pin endpoint (or start point)
2338 * Get audio pin status - connected or disconnected.
2340 * Returns 1 for connected otherwise 0.
2342 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2345 struct snd_soc_dapm_widget *w;
2347 list_for_each_entry(w, &dapm->card->widgets, list) {
2348 if (w->dapm != dapm)
2350 if (!strcmp(w->name, pin))
2351 return w->connected;
2356 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2359 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2360 * @dapm: DAPM context
2361 * @pin: audio signal pin endpoint (or start point)
2363 * Mark the given endpoint or pin as ignoring suspend. When the
2364 * system is disabled a path between two endpoints flagged as ignoring
2365 * suspend will not be disabled. The path must already be enabled via
2366 * normal means at suspend time, it will not be turned on if it was not
2369 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2372 struct snd_soc_dapm_widget *w;
2374 list_for_each_entry(w, &dapm->card->widgets, list) {
2375 if (w->dapm != dapm)
2377 if (!strcmp(w->name, pin)) {
2378 w->ignore_suspend = 1;
2383 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2386 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2389 * snd_soc_dapm_free - free dapm resources
2392 * Free all dapm widgets and resources.
2394 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2396 snd_soc_dapm_sys_remove(dapm->dev);
2397 dapm_free_widgets(dapm);
2398 list_del(&dapm->list);
2400 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2402 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2404 struct snd_soc_dapm_widget *w;
2405 LIST_HEAD(down_list);
2408 list_for_each_entry(w, &dapm->card->widgets, list) {
2409 if (w->dapm != dapm)
2412 dapm_seq_insert(w, &down_list, false);
2418 /* If there were no widgets to power down we're already in
2422 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_PREPARE);
2423 dapm_seq_run(dapm, &down_list, 0, false);
2424 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_STANDBY);
2429 * snd_soc_dapm_shutdown - callback for system shutdown
2431 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2433 struct snd_soc_codec *codec;
2435 list_for_each_entry(codec, &card->codec_dev_list, list) {
2436 soc_dapm_shutdown_codec(&codec->dapm);
2437 snd_soc_dapm_set_bias_level(card, &codec->dapm, SND_SOC_BIAS_OFF);
2441 /* Module information */
2442 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2443 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2444 MODULE_LICENSE("GPL");