1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 //
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 //
8 // Features:
9 // o Changes power status of internal codec blocks depending on the
10 // dynamic configuration of codec internal audio paths and active
11 // DACs/ADCs.
12 // o Platform power domain - can support external components i.e. amps and
13 // mic/headphone insertion events.
14 // o Automatic Mic Bias support
15 // o Jack insertion power event initiation - e.g. hp insertion will enable
16 // sinks, dacs, etc
17 // o Delayed power down of audio subsystem to reduce pops between a quick
18 // device reopen.
19
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/async.h>
23 #include <linux/delay.h>
24 #include <linux/pm.h>
25 #include <linux/bitops.h>
26 #include <linux/platform_device.h>
27 #include <linux/jiffies.h>
28 #include <linux/debugfs.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/regulator/consumer.h>
31 #include <linux/pinctrl/consumer.h>
32 #include <linux/clk.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/initval.h>
39
40 #include <trace/events/asoc.h>
41
42 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
43
44 #define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
45 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
46
47 #define snd_soc_dapm_for_each_direction(dir) \
48 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
49 (dir)++)
50
51 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
52 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
53 const char *control,
54 int (*connected)(struct snd_soc_dapm_widget *source,
55 struct snd_soc_dapm_widget *sink));
56
57 struct snd_soc_dapm_widget *
58 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
59 const struct snd_soc_dapm_widget *widget);
60
61 struct snd_soc_dapm_widget *
62 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
63 const struct snd_soc_dapm_widget *widget);
64
65 static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg);
66
67 /* dapm power sequences - make this per codec in the future */
68 static int dapm_up_seq[] = {
69 [snd_soc_dapm_pre] = 1,
70 [snd_soc_dapm_regulator_supply] = 2,
71 [snd_soc_dapm_pinctrl] = 2,
72 [snd_soc_dapm_clock_supply] = 2,
73 [snd_soc_dapm_supply] = 3,
74 [snd_soc_dapm_dai_link] = 3,
75 [snd_soc_dapm_micbias] = 4,
76 [snd_soc_dapm_vmid] = 4,
77 [snd_soc_dapm_dai_in] = 5,
78 [snd_soc_dapm_dai_out] = 5,
79 [snd_soc_dapm_aif_in] = 5,
80 [snd_soc_dapm_aif_out] = 5,
81 [snd_soc_dapm_mic] = 6,
82 [snd_soc_dapm_siggen] = 6,
83 [snd_soc_dapm_input] = 6,
84 [snd_soc_dapm_output] = 6,
85 [snd_soc_dapm_mux] = 7,
86 [snd_soc_dapm_demux] = 7,
87 [snd_soc_dapm_dac] = 8,
88 [snd_soc_dapm_switch] = 9,
89 [snd_soc_dapm_mixer] = 9,
90 [snd_soc_dapm_mixer_named_ctl] = 9,
91 [snd_soc_dapm_pga] = 10,
92 [snd_soc_dapm_buffer] = 10,
93 [snd_soc_dapm_scheduler] = 10,
94 [snd_soc_dapm_effect] = 10,
95 [snd_soc_dapm_src] = 10,
96 [snd_soc_dapm_asrc] = 10,
97 [snd_soc_dapm_encoder] = 10,
98 [snd_soc_dapm_decoder] = 10,
99 [snd_soc_dapm_adc] = 11,
100 [snd_soc_dapm_out_drv] = 12,
101 [snd_soc_dapm_hp] = 12,
102 [snd_soc_dapm_line] = 12,
103 [snd_soc_dapm_sink] = 12,
104 [snd_soc_dapm_spk] = 13,
105 [snd_soc_dapm_kcontrol] = 14,
106 [snd_soc_dapm_post] = 15,
107 };
108
109 static int dapm_down_seq[] = {
110 [snd_soc_dapm_pre] = 1,
111 [snd_soc_dapm_kcontrol] = 2,
112 [snd_soc_dapm_adc] = 3,
113 [snd_soc_dapm_spk] = 4,
114 [snd_soc_dapm_hp] = 5,
115 [snd_soc_dapm_line] = 5,
116 [snd_soc_dapm_out_drv] = 5,
117 [snd_soc_dapm_sink] = 6,
118 [snd_soc_dapm_pga] = 6,
119 [snd_soc_dapm_buffer] = 6,
120 [snd_soc_dapm_scheduler] = 6,
121 [snd_soc_dapm_effect] = 6,
122 [snd_soc_dapm_src] = 6,
123 [snd_soc_dapm_asrc] = 6,
124 [snd_soc_dapm_encoder] = 6,
125 [snd_soc_dapm_decoder] = 6,
126 [snd_soc_dapm_switch] = 7,
127 [snd_soc_dapm_mixer_named_ctl] = 7,
128 [snd_soc_dapm_mixer] = 7,
129 [snd_soc_dapm_dac] = 8,
130 [snd_soc_dapm_mic] = 9,
131 [snd_soc_dapm_siggen] = 9,
132 [snd_soc_dapm_input] = 9,
133 [snd_soc_dapm_output] = 9,
134 [snd_soc_dapm_micbias] = 10,
135 [snd_soc_dapm_vmid] = 10,
136 [snd_soc_dapm_mux] = 11,
137 [snd_soc_dapm_demux] = 11,
138 [snd_soc_dapm_aif_in] = 12,
139 [snd_soc_dapm_aif_out] = 12,
140 [snd_soc_dapm_dai_in] = 12,
141 [snd_soc_dapm_dai_out] = 12,
142 [snd_soc_dapm_dai_link] = 13,
143 [snd_soc_dapm_supply] = 14,
144 [snd_soc_dapm_clock_supply] = 15,
145 [snd_soc_dapm_pinctrl] = 15,
146 [snd_soc_dapm_regulator_supply] = 15,
147 [snd_soc_dapm_post] = 16,
148 };
149
dapm_assert_locked(struct snd_soc_dapm_context * dapm)150 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
151 {
152 if (snd_soc_card_is_instantiated(dapm->card))
153 snd_soc_dapm_mutex_assert_held(dapm);
154 }
155
pop_wait(u32 pop_time)156 static void pop_wait(u32 pop_time)
157 {
158 if (pop_time)
159 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
160 }
161
162 __printf(3, 4)
pop_dbg(struct device * dev,u32 pop_time,const char * fmt,...)163 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
164 {
165 va_list args;
166 char *buf;
167
168 if (!pop_time)
169 return;
170
171 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
172 if (buf == NULL)
173 return;
174
175 va_start(args, fmt);
176 vsnprintf(buf, PAGE_SIZE, fmt, args);
177 dev_info(dev, "%s", buf);
178 va_end(args);
179
180 kfree(buf);
181 }
182
dapm_dirty_widget(struct snd_soc_dapm_widget * w)183 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
184 {
185 return !list_empty(&w->dirty);
186 }
187
dapm_mark_dirty(struct snd_soc_dapm_widget * w,const char * reason)188 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
189 {
190 dapm_assert_locked(w->dapm);
191
192 if (!dapm_dirty_widget(w)) {
193 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
194 w->name, reason);
195 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
196 }
197 }
198
199 /*
200 * Common implementation for dapm_widget_invalidate_input_paths() and
201 * dapm_widget_invalidate_output_paths(). The function is inlined since the
202 * combined size of the two specialized functions is only marginally larger then
203 * the size of the generic function and at the same time the fast path of the
204 * specialized functions is significantly smaller than the generic function.
205 */
dapm_widget_invalidate_paths(struct snd_soc_dapm_widget * w,enum snd_soc_dapm_direction dir)206 static __always_inline void dapm_widget_invalidate_paths(
207 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
208 {
209 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
210 struct snd_soc_dapm_widget *node;
211 struct snd_soc_dapm_path *p;
212 LIST_HEAD(list);
213
214 dapm_assert_locked(w->dapm);
215
216 if (w->endpoints[dir] == -1)
217 return;
218
219 list_add_tail(&w->work_list, &list);
220 w->endpoints[dir] = -1;
221
222 list_for_each_entry(w, &list, work_list) {
223 snd_soc_dapm_widget_for_each_path(w, dir, p) {
224 if (p->is_supply || p->weak || !p->connect)
225 continue;
226 node = p->node[rdir];
227 if (node->endpoints[dir] != -1) {
228 node->endpoints[dir] = -1;
229 list_add_tail(&node->work_list, &list);
230 }
231 }
232 }
233 }
234
235 /*
236 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
237 * input paths
238 * @w: The widget for which to invalidate the cached number of input paths
239 *
240 * Resets the cached number of inputs for the specified widget and all widgets
241 * that can be reached via outcoming paths from the widget.
242 *
243 * This function must be called if the number of output paths for a widget might
244 * have changed. E.g. if the source state of a widget changes or a path is added
245 * or activated with the widget as the sink.
246 */
dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget * w)247 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
248 {
249 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
250 }
251
252 /*
253 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
254 * output paths
255 * @w: The widget for which to invalidate the cached number of output paths
256 *
257 * Resets the cached number of outputs for the specified widget and all widgets
258 * that can be reached via incoming paths from the widget.
259 *
260 * This function must be called if the number of output paths for a widget might
261 * have changed. E.g. if the sink state of a widget changes or a path is added
262 * or activated with the widget as the source.
263 */
dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget * w)264 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
265 {
266 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
267 }
268
269 /*
270 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
271 * for the widgets connected to a path
272 * @p: The path to invalidate
273 *
274 * Resets the cached number of inputs for the sink of the path and the cached
275 * number of outputs for the source of the path.
276 *
277 * This function must be called when a path is added, removed or the connected
278 * state changes.
279 */
dapm_path_invalidate(struct snd_soc_dapm_path * p)280 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
281 {
282 /*
283 * Weak paths or supply paths do not influence the number of input or
284 * output paths of their neighbors.
285 */
286 if (p->weak || p->is_supply)
287 return;
288
289 /*
290 * The number of connected endpoints is the sum of the number of
291 * connected endpoints of all neighbors. If a node with 0 connected
292 * endpoints is either connected or disconnected that sum won't change,
293 * so there is no need to re-check the path.
294 */
295 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
296 dapm_widget_invalidate_input_paths(p->sink);
297 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
298 dapm_widget_invalidate_output_paths(p->source);
299 }
300
dapm_mark_endpoints_dirty(struct snd_soc_card * card)301 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
302 {
303 struct snd_soc_dapm_widget *w;
304
305 snd_soc_dapm_mutex_lock_root(card);
306
307 for_each_card_widgets(card, w) {
308 if (w->is_ep) {
309 dapm_mark_dirty(w, "Rechecking endpoints");
310 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
311 dapm_widget_invalidate_output_paths(w);
312 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
313 dapm_widget_invalidate_input_paths(w);
314 }
315 }
316
317 snd_soc_dapm_mutex_unlock(card);
318 }
319 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
320
321 /* create a new dapm widget */
dapm_cnew_widget(const struct snd_soc_dapm_widget * _widget,const char * prefix)322 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
323 const struct snd_soc_dapm_widget *_widget,
324 const char *prefix)
325 {
326 struct snd_soc_dapm_widget *w;
327
328 w = kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
329 if (!w)
330 return NULL;
331
332 if (prefix)
333 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, _widget->name);
334 else
335 w->name = kstrdup_const(_widget->name, GFP_KERNEL);
336 if (!w->name) {
337 kfree(w);
338 return NULL;
339 }
340
341 if (_widget->sname) {
342 w->sname = kstrdup_const(_widget->sname, GFP_KERNEL);
343 if (!w->sname) {
344 kfree_const(w->name);
345 kfree(w);
346 return NULL;
347 }
348 }
349 return w;
350 }
351
352 struct dapm_kcontrol_data {
353 unsigned int value;
354 struct snd_soc_dapm_widget *widget;
355 struct list_head paths;
356 struct snd_soc_dapm_widget_list *wlist;
357 };
358
dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget * widget,struct snd_kcontrol * kcontrol,const char * ctrl_name)359 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
360 struct snd_kcontrol *kcontrol, const char *ctrl_name)
361 {
362 struct dapm_kcontrol_data *data;
363 struct soc_mixer_control *mc;
364 struct soc_enum *e;
365 const char *name;
366 int ret;
367
368 data = kzalloc(sizeof(*data), GFP_KERNEL);
369 if (!data)
370 return -ENOMEM;
371
372 INIT_LIST_HEAD(&data->paths);
373
374 switch (widget->id) {
375 case snd_soc_dapm_switch:
376 case snd_soc_dapm_mixer:
377 case snd_soc_dapm_mixer_named_ctl:
378 mc = (struct soc_mixer_control *)kcontrol->private_value;
379
380 if (mc->autodisable) {
381 struct snd_soc_dapm_widget template;
382
383 if (snd_soc_volsw_is_stereo(mc))
384 dev_warn(widget->dapm->dev,
385 "ASoC: Unsupported stereo autodisable control '%s'\n",
386 ctrl_name);
387
388 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
389 "Autodisable");
390 if (!name) {
391 ret = -ENOMEM;
392 goto err_data;
393 }
394
395 memset(&template, 0, sizeof(template));
396 template.reg = mc->reg;
397 template.mask = (1 << fls(mc->max)) - 1;
398 template.shift = mc->shift;
399 if (mc->invert)
400 template.off_val = mc->max;
401 else
402 template.off_val = 0;
403 template.on_val = template.off_val;
404 template.id = snd_soc_dapm_kcontrol;
405 template.name = name;
406
407 data->value = template.on_val;
408
409 data->widget =
410 snd_soc_dapm_new_control_unlocked(widget->dapm,
411 &template);
412 kfree(name);
413 if (IS_ERR(data->widget)) {
414 ret = PTR_ERR(data->widget);
415 goto err_data;
416 }
417 }
418 break;
419 case snd_soc_dapm_demux:
420 case snd_soc_dapm_mux:
421 e = (struct soc_enum *)kcontrol->private_value;
422
423 if (e->autodisable) {
424 struct snd_soc_dapm_widget template;
425
426 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
427 "Autodisable");
428 if (!name) {
429 ret = -ENOMEM;
430 goto err_data;
431 }
432
433 memset(&template, 0, sizeof(template));
434 template.reg = e->reg;
435 template.mask = e->mask;
436 template.shift = e->shift_l;
437 template.off_val = snd_soc_enum_item_to_val(e, 0);
438 template.on_val = template.off_val;
439 template.id = snd_soc_dapm_kcontrol;
440 template.name = name;
441
442 data->value = template.on_val;
443
444 data->widget = snd_soc_dapm_new_control_unlocked(
445 widget->dapm, &template);
446 kfree(name);
447 if (IS_ERR(data->widget)) {
448 ret = PTR_ERR(data->widget);
449 goto err_data;
450 }
451
452 snd_soc_dapm_add_path(widget->dapm, data->widget,
453 widget, NULL, NULL);
454 } else if (e->reg != SND_SOC_NOPM) {
455 data->value = soc_dapm_read(widget->dapm, e->reg) &
456 (e->mask << e->shift_l);
457 }
458 break;
459 default:
460 break;
461 }
462
463 kcontrol->private_data = data;
464
465 return 0;
466
467 err_data:
468 kfree(data);
469 return ret;
470 }
471
dapm_kcontrol_free(struct snd_kcontrol * kctl)472 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
473 {
474 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
475
476 list_del(&data->paths);
477 kfree(data->wlist);
478 kfree(data);
479 }
480
dapm_kcontrol_get_wlist(const struct snd_kcontrol * kcontrol)481 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
482 const struct snd_kcontrol *kcontrol)
483 {
484 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
485
486 return data->wlist;
487 }
488
dapm_kcontrol_add_widget(struct snd_kcontrol * kcontrol,struct snd_soc_dapm_widget * widget)489 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
490 struct snd_soc_dapm_widget *widget)
491 {
492 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 struct snd_soc_dapm_widget_list *new_wlist;
494 unsigned int n;
495
496 if (data->wlist)
497 n = data->wlist->num_widgets + 1;
498 else
499 n = 1;
500
501 new_wlist = krealloc(data->wlist,
502 struct_size(new_wlist, widgets, n),
503 GFP_KERNEL);
504 if (!new_wlist)
505 return -ENOMEM;
506
507 new_wlist->num_widgets = n;
508 new_wlist->widgets[n - 1] = widget;
509
510 data->wlist = new_wlist;
511
512 return 0;
513 }
514
dapm_kcontrol_add_path(const struct snd_kcontrol * kcontrol,struct snd_soc_dapm_path * path)515 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
516 struct snd_soc_dapm_path *path)
517 {
518 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
519
520 list_add_tail(&path->list_kcontrol, &data->paths);
521 }
522
dapm_kcontrol_is_powered(const struct snd_kcontrol * kcontrol)523 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
524 {
525 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
526
527 if (!data->widget)
528 return true;
529
530 return data->widget->power;
531 }
532
dapm_kcontrol_get_path_list(const struct snd_kcontrol * kcontrol)533 static struct list_head *dapm_kcontrol_get_path_list(
534 const struct snd_kcontrol *kcontrol)
535 {
536 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
537
538 return &data->paths;
539 }
540
541 #define dapm_kcontrol_for_each_path(path, kcontrol) \
542 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
543 list_kcontrol)
544
dapm_kcontrol_get_value(const struct snd_kcontrol * kcontrol)545 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
546 {
547 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
548
549 return data->value;
550 }
551 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
552
dapm_kcontrol_set_value(const struct snd_kcontrol * kcontrol,unsigned int value)553 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
554 unsigned int value)
555 {
556 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
557
558 if (data->value == value)
559 return false;
560
561 if (data->widget) {
562 switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
563 case snd_soc_dapm_switch:
564 case snd_soc_dapm_mixer:
565 case snd_soc_dapm_mixer_named_ctl:
566 data->widget->on_val = value & data->widget->mask;
567 break;
568 case snd_soc_dapm_demux:
569 case snd_soc_dapm_mux:
570 data->widget->on_val = value >> data->widget->shift;
571 break;
572 default:
573 data->widget->on_val = value;
574 break;
575 }
576 }
577
578 data->value = value;
579
580 return true;
581 }
582
583 /**
584 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
585 * kcontrol
586 * @kcontrol: The kcontrol
587 */
snd_soc_dapm_kcontrol_widget(struct snd_kcontrol * kcontrol)588 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
589 struct snd_kcontrol *kcontrol)
590 {
591 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
592 }
593 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
594
595 /**
596 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
597 * kcontrol
598 * @kcontrol: The kcontrol
599 *
600 * Note: This function must only be used on kcontrols that are known to have
601 * been registered for a CODEC. Otherwise the behaviour is undefined.
602 */
snd_soc_dapm_kcontrol_dapm(struct snd_kcontrol * kcontrol)603 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
604 struct snd_kcontrol *kcontrol)
605 {
606 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
607 }
608 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
609
dapm_reset(struct snd_soc_card * card)610 static void dapm_reset(struct snd_soc_card *card)
611 {
612 struct snd_soc_dapm_widget *w;
613
614 snd_soc_dapm_mutex_assert_held(card);
615
616 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
617
618 for_each_card_widgets(card, w) {
619 w->new_power = w->power;
620 w->power_checked = false;
621 }
622 }
623
soc_dapm_prefix(struct snd_soc_dapm_context * dapm)624 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
625 {
626 if (!dapm->component)
627 return NULL;
628 return dapm->component->name_prefix;
629 }
630
soc_dapm_read(struct snd_soc_dapm_context * dapm,int reg)631 static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg)
632 {
633 if (!dapm->component)
634 return -EIO;
635 return snd_soc_component_read(dapm->component, reg);
636 }
637
soc_dapm_update_bits(struct snd_soc_dapm_context * dapm,int reg,unsigned int mask,unsigned int value)638 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
639 int reg, unsigned int mask, unsigned int value)
640 {
641 if (!dapm->component)
642 return -EIO;
643 return snd_soc_component_update_bits(dapm->component, reg,
644 mask, value);
645 }
646
soc_dapm_test_bits(struct snd_soc_dapm_context * dapm,int reg,unsigned int mask,unsigned int value)647 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
648 int reg, unsigned int mask, unsigned int value)
649 {
650 if (!dapm->component)
651 return -EIO;
652 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
653 }
654
soc_dapm_async_complete(struct snd_soc_dapm_context * dapm)655 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
656 {
657 if (dapm->component)
658 snd_soc_component_async_complete(dapm->component);
659 }
660
661 static struct snd_soc_dapm_widget *
dapm_wcache_lookup(struct snd_soc_dapm_widget * w,const char * name)662 dapm_wcache_lookup(struct snd_soc_dapm_widget *w, const char *name)
663 {
664 if (w) {
665 struct list_head *wlist = &w->dapm->card->widgets;
666 const int depth = 2;
667 int i = 0;
668
669 list_for_each_entry_from(w, wlist, list) {
670 if (!strcmp(name, w->name))
671 return w;
672
673 if (++i == depth)
674 break;
675 }
676 }
677
678 return NULL;
679 }
680
681 /**
682 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
683 * @dapm: The DAPM context for which to set the level
684 * @level: The level to set
685 *
686 * Forces the DAPM bias level to a specific state. It will call the bias level
687 * callback of DAPM context with the specified level. This will even happen if
688 * the context is already at the same level. Furthermore it will not go through
689 * the normal bias level sequencing, meaning any intermediate states between the
690 * current and the target state will not be entered.
691 *
692 * Note that the change in bias level is only temporary and the next time
693 * snd_soc_dapm_sync() is called the state will be set to the level as
694 * determined by the DAPM core. The function is mainly intended to be used to
695 * used during probe or resume from suspend to power up the device so
696 * initialization can be done, before the DAPM core takes over.
697 */
snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)698 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
699 enum snd_soc_bias_level level)
700 {
701 int ret = 0;
702
703 if (dapm->component)
704 ret = snd_soc_component_set_bias_level(dapm->component, level);
705
706 if (ret == 0)
707 dapm->bias_level = level;
708
709 return ret;
710 }
711 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
712
713 /**
714 * snd_soc_dapm_set_bias_level - set the bias level for the system
715 * @dapm: DAPM context
716 * @level: level to configure
717 *
718 * Configure the bias (power) levels for the SoC audio device.
719 *
720 * Returns 0 for success else error.
721 */
snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)722 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
723 enum snd_soc_bias_level level)
724 {
725 struct snd_soc_card *card = dapm->card;
726 int ret = 0;
727
728 trace_snd_soc_bias_level_start(dapm, level);
729
730 ret = snd_soc_card_set_bias_level(card, dapm, level);
731 if (ret != 0)
732 goto out;
733
734 if (!card || dapm != &card->dapm)
735 ret = snd_soc_dapm_force_bias_level(dapm, level);
736
737 if (ret != 0)
738 goto out;
739
740 ret = snd_soc_card_set_bias_level_post(card, dapm, level);
741 out:
742 trace_snd_soc_bias_level_done(dapm, level);
743
744 return ret;
745 }
746
747 /* connect mux widget to its interconnecting audio paths */
dapm_connect_mux(struct snd_soc_dapm_context * dapm,struct snd_soc_dapm_path * path,const char * control_name,struct snd_soc_dapm_widget * w)748 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
749 struct snd_soc_dapm_path *path, const char *control_name,
750 struct snd_soc_dapm_widget *w)
751 {
752 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
753 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
754 unsigned int item;
755 int i;
756
757 if (e->reg != SND_SOC_NOPM) {
758 unsigned int val;
759 val = soc_dapm_read(dapm, e->reg);
760 val = (val >> e->shift_l) & e->mask;
761 item = snd_soc_enum_val_to_item(e, val);
762 } else {
763 /* since a virtual mux has no backing registers to
764 * decide which path to connect, it will try to match
765 * with the first enumeration. This is to ensure
766 * that the default mux choice (the first) will be
767 * correctly powered up during initialization.
768 */
769 item = 0;
770 }
771
772 i = match_string(e->texts, e->items, control_name);
773 if (i < 0)
774 return -ENODEV;
775
776 path->name = e->texts[i];
777 path->connect = (i == item);
778 return 0;
779
780 }
781
782 /* set up initial codec paths */
dapm_set_mixer_path_status(struct snd_soc_dapm_path * p,int i,int nth_path)783 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
784 int nth_path)
785 {
786 struct soc_mixer_control *mc = (struct soc_mixer_control *)
787 p->sink->kcontrol_news[i].private_value;
788 unsigned int reg = mc->reg;
789 unsigned int invert = mc->invert;
790
791 if (reg != SND_SOC_NOPM) {
792 unsigned int shift = mc->shift;
793 unsigned int max = mc->max;
794 unsigned int mask = (1 << fls(max)) - 1;
795 unsigned int val = soc_dapm_read(p->sink->dapm, reg);
796
797 /*
798 * The nth_path argument allows this function to know
799 * which path of a kcontrol it is setting the initial
800 * status for. Ideally this would support any number
801 * of paths and channels. But since kcontrols only come
802 * in mono and stereo variants, we are limited to 2
803 * channels.
804 *
805 * The following code assumes for stereo controls the
806 * first path is the left channel, and all remaining
807 * paths are the right channel.
808 */
809 if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) {
810 if (reg != mc->rreg)
811 val = soc_dapm_read(p->sink->dapm, mc->rreg);
812 val = (val >> mc->rshift) & mask;
813 } else {
814 val = (val >> shift) & mask;
815 }
816 if (invert)
817 val = max - val;
818 p->connect = !!val;
819 } else {
820 /* since a virtual mixer has no backing registers to
821 * decide which path to connect, it will try to match
822 * with initial state. This is to ensure
823 * that the default mixer choice will be
824 * correctly powered up during initialization.
825 */
826 p->connect = invert;
827 }
828 }
829
830 /* connect mixer widget to its interconnecting audio paths */
dapm_connect_mixer(struct snd_soc_dapm_context * dapm,struct snd_soc_dapm_path * path,const char * control_name)831 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
832 struct snd_soc_dapm_path *path, const char *control_name)
833 {
834 int i, nth_path = 0;
835
836 /* search for mixer kcontrol */
837 for (i = 0; i < path->sink->num_kcontrols; i++) {
838 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
839 path->name = path->sink->kcontrol_news[i].name;
840 dapm_set_mixer_path_status(path, i, nth_path++);
841 return 0;
842 }
843 }
844 return -ENODEV;
845 }
846
dapm_is_shared_kcontrol(struct snd_soc_dapm_context * dapm,struct snd_soc_dapm_widget * kcontrolw,const struct snd_kcontrol_new * kcontrol_new,struct snd_kcontrol ** kcontrol)847 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
848 struct snd_soc_dapm_widget *kcontrolw,
849 const struct snd_kcontrol_new *kcontrol_new,
850 struct snd_kcontrol **kcontrol)
851 {
852 struct snd_soc_dapm_widget *w;
853 int i;
854
855 *kcontrol = NULL;
856
857 for_each_card_widgets(dapm->card, w) {
858 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
859 continue;
860 for (i = 0; i < w->num_kcontrols; i++) {
861 if (&w->kcontrol_news[i] == kcontrol_new) {
862 if (w->kcontrols)
863 *kcontrol = w->kcontrols[i];
864 return 1;
865 }
866 }
867 }
868
869 return 0;
870 }
871
872 /*
873 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
874 * create it. Either way, add the widget into the control's widget list
875 */
dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget * w,int kci)876 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
877 int kci)
878 {
879 struct snd_soc_dapm_context *dapm = w->dapm;
880 struct snd_card *card = dapm->card->snd_card;
881 const char *prefix;
882 size_t prefix_len;
883 int shared;
884 struct snd_kcontrol *kcontrol;
885 bool wname_in_long_name, kcname_in_long_name;
886 char *long_name = NULL;
887 const char *name;
888 int ret = 0;
889
890 prefix = soc_dapm_prefix(dapm);
891 if (prefix)
892 prefix_len = strlen(prefix) + 1;
893 else
894 prefix_len = 0;
895
896 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
897 &kcontrol);
898
899 if (!kcontrol) {
900 if (shared) {
901 wname_in_long_name = false;
902 kcname_in_long_name = true;
903 } else {
904 switch (w->id) {
905 case snd_soc_dapm_switch:
906 case snd_soc_dapm_mixer:
907 case snd_soc_dapm_pga:
908 case snd_soc_dapm_effect:
909 case snd_soc_dapm_out_drv:
910 wname_in_long_name = true;
911 kcname_in_long_name = true;
912 break;
913 case snd_soc_dapm_mixer_named_ctl:
914 wname_in_long_name = false;
915 kcname_in_long_name = true;
916 break;
917 case snd_soc_dapm_demux:
918 case snd_soc_dapm_mux:
919 wname_in_long_name = true;
920 kcname_in_long_name = false;
921 break;
922 default:
923 return -EINVAL;
924 }
925 }
926 if (w->no_wname_in_kcontrol_name)
927 wname_in_long_name = false;
928
929 if (wname_in_long_name && kcname_in_long_name) {
930 /*
931 * The control will get a prefix from the control
932 * creation process but we're also using the same
933 * prefix for widgets so cut the prefix off the
934 * front of the widget name.
935 */
936 long_name = kasprintf(GFP_KERNEL, "%s %s",
937 w->name + prefix_len,
938 w->kcontrol_news[kci].name);
939 if (long_name == NULL)
940 return -ENOMEM;
941
942 name = long_name;
943 } else if (wname_in_long_name) {
944 long_name = NULL;
945 name = w->name + prefix_len;
946 } else {
947 long_name = NULL;
948 name = w->kcontrol_news[kci].name;
949 }
950
951 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
952 prefix);
953 if (!kcontrol) {
954 ret = -ENOMEM;
955 goto exit_free;
956 }
957
958 kcontrol->private_free = dapm_kcontrol_free;
959
960 ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
961 if (ret) {
962 snd_ctl_free_one(kcontrol);
963 goto exit_free;
964 }
965
966 ret = snd_ctl_add(card, kcontrol);
967 if (ret < 0) {
968 dev_err(dapm->dev,
969 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
970 w->name, name, ret);
971 goto exit_free;
972 }
973 }
974
975 ret = dapm_kcontrol_add_widget(kcontrol, w);
976 if (ret == 0)
977 w->kcontrols[kci] = kcontrol;
978
979 exit_free:
980 kfree(long_name);
981
982 return ret;
983 }
984
985 /* create new dapm mixer control */
dapm_new_mixer(struct snd_soc_dapm_widget * w)986 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
987 {
988 int i, ret;
989 struct snd_soc_dapm_path *path;
990 struct dapm_kcontrol_data *data;
991
992 /* add kcontrol */
993 for (i = 0; i < w->num_kcontrols; i++) {
994 /* match name */
995 snd_soc_dapm_widget_for_each_source_path(w, path) {
996 /* mixer/mux paths name must match control name */
997 if (path->name != (char *)w->kcontrol_news[i].name)
998 continue;
999
1000 if (!w->kcontrols[i]) {
1001 ret = dapm_create_or_share_kcontrol(w, i);
1002 if (ret < 0)
1003 return ret;
1004 }
1005
1006 dapm_kcontrol_add_path(w->kcontrols[i], path);
1007
1008 data = snd_kcontrol_chip(w->kcontrols[i]);
1009 if (data->widget)
1010 snd_soc_dapm_add_path(data->widget->dapm,
1011 data->widget,
1012 path->source,
1013 NULL, NULL);
1014 }
1015 }
1016
1017 return 0;
1018 }
1019
1020 /* create new dapm mux control */
dapm_new_mux(struct snd_soc_dapm_widget * w)1021 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
1022 {
1023 struct snd_soc_dapm_context *dapm = w->dapm;
1024 enum snd_soc_dapm_direction dir;
1025 struct snd_soc_dapm_path *path;
1026 const char *type;
1027 int ret;
1028
1029 switch (w->id) {
1030 case snd_soc_dapm_mux:
1031 dir = SND_SOC_DAPM_DIR_OUT;
1032 type = "mux";
1033 break;
1034 case snd_soc_dapm_demux:
1035 dir = SND_SOC_DAPM_DIR_IN;
1036 type = "demux";
1037 break;
1038 default:
1039 return -EINVAL;
1040 }
1041
1042 if (w->num_kcontrols != 1) {
1043 dev_err(dapm->dev,
1044 "ASoC: %s %s has incorrect number of controls\n", type,
1045 w->name);
1046 return -EINVAL;
1047 }
1048
1049 if (list_empty(&w->edges[dir])) {
1050 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
1051 return -EINVAL;
1052 }
1053
1054 ret = dapm_create_or_share_kcontrol(w, 0);
1055 if (ret < 0)
1056 return ret;
1057
1058 snd_soc_dapm_widget_for_each_path(w, dir, path) {
1059 if (path->name)
1060 dapm_kcontrol_add_path(w->kcontrols[0], path);
1061 }
1062
1063 return 0;
1064 }
1065
1066 /* create new dapm volume control */
dapm_new_pga(struct snd_soc_dapm_widget * w)1067 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
1068 {
1069 int i;
1070
1071 for (i = 0; i < w->num_kcontrols; i++) {
1072 int ret = dapm_create_or_share_kcontrol(w, i);
1073 if (ret < 0)
1074 return ret;
1075 }
1076
1077 return 0;
1078 }
1079
1080 /* create new dapm dai link control */
dapm_new_dai_link(struct snd_soc_dapm_widget * w)1081 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1082 {
1083 int i;
1084 struct snd_soc_pcm_runtime *rtd = w->priv;
1085
1086 /* create control for links with > 1 config */
1087 if (rtd->dai_link->num_c2c_params <= 1)
1088 return 0;
1089
1090 /* add kcontrol */
1091 for (i = 0; i < w->num_kcontrols; i++) {
1092 struct snd_soc_dapm_context *dapm = w->dapm;
1093 struct snd_card *card = dapm->card->snd_card;
1094 struct snd_kcontrol *kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
1095 w, w->name, NULL);
1096 int ret = snd_ctl_add(card, kcontrol);
1097
1098 if (ret < 0) {
1099 dev_err(dapm->dev,
1100 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1101 w->name, w->kcontrol_news[i].name, ret);
1102 return ret;
1103 }
1104 kcontrol->private_data = w;
1105 w->kcontrols[i] = kcontrol;
1106 }
1107
1108 return 0;
1109 }
1110
1111 /* We implement power down on suspend by checking the power state of
1112 * the ALSA card - when we are suspending the ALSA state for the card
1113 * is set to D3.
1114 */
snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget * widget)1115 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1116 {
1117 int level = snd_power_get_state(widget->dapm->card->snd_card);
1118
1119 switch (level) {
1120 case SNDRV_CTL_POWER_D3hot:
1121 case SNDRV_CTL_POWER_D3cold:
1122 if (widget->ignore_suspend)
1123 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1124 widget->name);
1125 return widget->ignore_suspend;
1126 default:
1127 return 1;
1128 }
1129 }
1130
dapm_widget_list_free(struct snd_soc_dapm_widget_list ** list)1131 static void dapm_widget_list_free(struct snd_soc_dapm_widget_list **list)
1132 {
1133 kfree(*list);
1134 }
1135
dapm_widget_list_create(struct snd_soc_dapm_widget_list ** list,struct list_head * widgets)1136 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1137 struct list_head *widgets)
1138 {
1139 struct snd_soc_dapm_widget *w;
1140 struct list_head *it;
1141 unsigned int size = 0;
1142 unsigned int i = 0;
1143
1144 list_for_each(it, widgets)
1145 size++;
1146
1147 *list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL);
1148 if (*list == NULL)
1149 return -ENOMEM;
1150
1151 list_for_each_entry(w, widgets, work_list)
1152 (*list)->widgets[i++] = w;
1153
1154 (*list)->num_widgets = i;
1155
1156 return 0;
1157 }
1158
1159 /*
1160 * Recursively reset the cached number of inputs or outputs for the specified
1161 * widget and all widgets that can be reached via incoming or outcoming paths
1162 * from the widget.
1163 */
invalidate_paths_ep(struct snd_soc_dapm_widget * widget,enum snd_soc_dapm_direction dir)1164 static void invalidate_paths_ep(struct snd_soc_dapm_widget *widget,
1165 enum snd_soc_dapm_direction dir)
1166 {
1167 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1168 struct snd_soc_dapm_path *path;
1169
1170 widget->endpoints[dir] = -1;
1171
1172 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1173 if (path->weak || path->is_supply)
1174 continue;
1175
1176 if (path->walking)
1177 return;
1178
1179 if (path->connect) {
1180 path->walking = 1;
1181 invalidate_paths_ep(path->node[dir], dir);
1182 path->walking = 0;
1183 }
1184 }
1185 }
1186
1187 /*
1188 * Common implementation for is_connected_output_ep() and
1189 * is_connected_input_ep(). The function is inlined since the combined size of
1190 * the two specialized functions is only marginally larger then the size of the
1191 * generic function and at the same time the fast path of the specialized
1192 * functions is significantly smaller than the generic function.
1193 */
is_connected_ep(struct snd_soc_dapm_widget * widget,struct list_head * list,enum snd_soc_dapm_direction dir,int (* fn)(struct snd_soc_dapm_widget *,struct list_head *,bool (* custom_stop_condition)(struct snd_soc_dapm_widget *,enum snd_soc_dapm_direction)),bool (* custom_stop_condition)(struct snd_soc_dapm_widget *,enum snd_soc_dapm_direction))1194 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1195 struct list_head *list, enum snd_soc_dapm_direction dir,
1196 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
1197 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1198 enum snd_soc_dapm_direction)),
1199 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1200 enum snd_soc_dapm_direction))
1201 {
1202 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1203 struct snd_soc_dapm_path *path;
1204 int con = 0;
1205
1206 if (widget->endpoints[dir] >= 0)
1207 return widget->endpoints[dir];
1208
1209 DAPM_UPDATE_STAT(widget, path_checks);
1210
1211 /* do we need to add this widget to the list ? */
1212 if (list)
1213 list_add_tail(&widget->work_list, list);
1214
1215 if (custom_stop_condition && custom_stop_condition(widget, dir)) {
1216 list = NULL;
1217 custom_stop_condition = NULL;
1218 }
1219
1220 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1221 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1222 return widget->endpoints[dir];
1223 }
1224
1225 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1226 DAPM_UPDATE_STAT(widget, neighbour_checks);
1227
1228 if (path->weak || path->is_supply)
1229 continue;
1230
1231 if (path->walking)
1232 return 1;
1233
1234 trace_snd_soc_dapm_path(widget, dir, path);
1235
1236 if (path->connect) {
1237 path->walking = 1;
1238 con += fn(path->node[dir], list, custom_stop_condition);
1239 path->walking = 0;
1240 }
1241 }
1242
1243 widget->endpoints[dir] = con;
1244
1245 return con;
1246 }
1247
1248 /*
1249 * Recursively check for a completed path to an active or physically connected
1250 * output widget. Returns number of complete paths.
1251 *
1252 * Optionally, can be supplied with a function acting as a stopping condition.
1253 * This function takes the dapm widget currently being examined and the walk
1254 * direction as an arguments, it should return true if widgets from that point
1255 * in the graph onwards should not be added to the widget list.
1256 */
is_connected_output_ep(struct snd_soc_dapm_widget * widget,struct list_head * list,bool (* custom_stop_condition)(struct snd_soc_dapm_widget * i,enum snd_soc_dapm_direction))1257 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1258 struct list_head *list,
1259 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1260 enum snd_soc_dapm_direction))
1261 {
1262 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1263 is_connected_output_ep, custom_stop_condition);
1264 }
1265
1266 /*
1267 * Recursively check for a completed path to an active or physically connected
1268 * input widget. Returns number of complete paths.
1269 *
1270 * Optionally, can be supplied with a function acting as a stopping condition.
1271 * This function takes the dapm widget currently being examined and the walk
1272 * direction as an arguments, it should return true if the walk should be
1273 * stopped and false otherwise.
1274 */
is_connected_input_ep(struct snd_soc_dapm_widget * widget,struct list_head * list,bool (* custom_stop_condition)(struct snd_soc_dapm_widget * i,enum snd_soc_dapm_direction))1275 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1276 struct list_head *list,
1277 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1278 enum snd_soc_dapm_direction))
1279 {
1280 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1281 is_connected_input_ep, custom_stop_condition);
1282 }
1283
1284 /**
1285 * snd_soc_dapm_dai_get_connected_widgets - query audio path and it's widgets.
1286 * @dai: the soc DAI.
1287 * @stream: stream direction.
1288 * @list: list of active widgets for this stream.
1289 * @custom_stop_condition: (optional) a function meant to stop the widget graph
1290 * walk based on custom logic.
1291 *
1292 * Queries DAPM graph as to whether a valid audio stream path exists for
1293 * the initial stream specified by name. This takes into account
1294 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1295 *
1296 * Optionally, can be supplied with a function acting as a stopping condition.
1297 * This function takes the dapm widget currently being examined and the walk
1298 * direction as an arguments, it should return true if the walk should be
1299 * stopped and false otherwise.
1300 *
1301 * Returns the number of valid paths or negative error.
1302 */
snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai * dai,int stream,struct snd_soc_dapm_widget_list ** list,bool (* custom_stop_condition)(struct snd_soc_dapm_widget *,enum snd_soc_dapm_direction))1303 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1304 struct snd_soc_dapm_widget_list **list,
1305 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1306 enum snd_soc_dapm_direction))
1307 {
1308 struct snd_soc_card *card = dai->component->card;
1309 struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(dai, stream);
1310 LIST_HEAD(widgets);
1311 int paths;
1312 int ret;
1313
1314 snd_soc_dapm_mutex_lock(card);
1315
1316 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1317 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_OUT);
1318 paths = is_connected_output_ep(w, &widgets,
1319 custom_stop_condition);
1320 } else {
1321 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_IN);
1322 paths = is_connected_input_ep(w, &widgets,
1323 custom_stop_condition);
1324 }
1325
1326 /* Drop starting point */
1327 list_del(widgets.next);
1328
1329 ret = dapm_widget_list_create(list, &widgets);
1330 if (ret)
1331 paths = ret;
1332
1333 trace_snd_soc_dapm_connected(paths, stream);
1334 snd_soc_dapm_mutex_unlock(card);
1335
1336 return paths;
1337 }
1338 EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_get_connected_widgets);
1339
snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list ** list)1340 void snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list **list)
1341 {
1342 dapm_widget_list_free(list);
1343 }
1344 EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_free_widgets);
1345
1346 /*
1347 * Handler for regulator supply widget.
1348 */
dapm_regulator_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1349 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1350 struct snd_kcontrol *kcontrol, int event)
1351 {
1352 int ret;
1353
1354 soc_dapm_async_complete(w->dapm);
1355
1356 if (SND_SOC_DAPM_EVENT_ON(event)) {
1357 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1358 ret = regulator_allow_bypass(w->regulator, false);
1359 if (ret != 0)
1360 dev_warn(w->dapm->dev,
1361 "ASoC: Failed to unbypass %s: %d\n",
1362 w->name, ret);
1363 }
1364
1365 return regulator_enable(w->regulator);
1366 } else {
1367 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1368 ret = regulator_allow_bypass(w->regulator, true);
1369 if (ret != 0)
1370 dev_warn(w->dapm->dev,
1371 "ASoC: Failed to bypass %s: %d\n",
1372 w->name, ret);
1373 }
1374
1375 return regulator_disable_deferred(w->regulator, w->shift);
1376 }
1377 }
1378 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1379
1380 /*
1381 * Handler for pinctrl widget.
1382 */
dapm_pinctrl_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1383 int dapm_pinctrl_event(struct snd_soc_dapm_widget *w,
1384 struct snd_kcontrol *kcontrol, int event)
1385 {
1386 struct snd_soc_dapm_pinctrl_priv *priv = w->priv;
1387 struct pinctrl *p = w->pinctrl;
1388 struct pinctrl_state *s;
1389
1390 if (!p || !priv)
1391 return -EIO;
1392
1393 if (SND_SOC_DAPM_EVENT_ON(event))
1394 s = pinctrl_lookup_state(p, priv->active_state);
1395 else
1396 s = pinctrl_lookup_state(p, priv->sleep_state);
1397
1398 if (IS_ERR(s))
1399 return PTR_ERR(s);
1400
1401 return pinctrl_select_state(p, s);
1402 }
1403 EXPORT_SYMBOL_GPL(dapm_pinctrl_event);
1404
1405 /*
1406 * Handler for clock supply widget.
1407 */
dapm_clock_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1408 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1409 struct snd_kcontrol *kcontrol, int event)
1410 {
1411 if (!w->clk)
1412 return -EIO;
1413
1414 soc_dapm_async_complete(w->dapm);
1415
1416 if (SND_SOC_DAPM_EVENT_ON(event)) {
1417 return clk_prepare_enable(w->clk);
1418 } else {
1419 clk_disable_unprepare(w->clk);
1420 return 0;
1421 }
1422
1423 return 0;
1424 }
1425 EXPORT_SYMBOL_GPL(dapm_clock_event);
1426
dapm_widget_power_check(struct snd_soc_dapm_widget * w)1427 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1428 {
1429 if (w->power_checked)
1430 return w->new_power;
1431
1432 if (w->force)
1433 w->new_power = 1;
1434 else
1435 w->new_power = w->power_check(w);
1436
1437 w->power_checked = true;
1438
1439 return w->new_power;
1440 }
1441
1442 /* Generic check to see if a widget should be powered. */
dapm_generic_check_power(struct snd_soc_dapm_widget * w)1443 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1444 {
1445 int in, out;
1446
1447 DAPM_UPDATE_STAT(w, power_checks);
1448
1449 in = is_connected_input_ep(w, NULL, NULL);
1450 out = is_connected_output_ep(w, NULL, NULL);
1451 return out != 0 && in != 0;
1452 }
1453
1454 /* Check to see if a power supply is needed */
dapm_supply_check_power(struct snd_soc_dapm_widget * w)1455 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1456 {
1457 struct snd_soc_dapm_path *path;
1458
1459 DAPM_UPDATE_STAT(w, power_checks);
1460
1461 /* Check if one of our outputs is connected */
1462 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1463 DAPM_UPDATE_STAT(w, neighbour_checks);
1464
1465 if (path->weak)
1466 continue;
1467
1468 if (path->connected &&
1469 !path->connected(path->source, path->sink))
1470 continue;
1471
1472 if (dapm_widget_power_check(path->sink))
1473 return 1;
1474 }
1475
1476 return 0;
1477 }
1478
dapm_always_on_check_power(struct snd_soc_dapm_widget * w)1479 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1480 {
1481 return w->connected;
1482 }
1483
dapm_seq_compare(struct snd_soc_dapm_widget * a,struct snd_soc_dapm_widget * b,bool power_up)1484 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1485 struct snd_soc_dapm_widget *b,
1486 bool power_up)
1487 {
1488 int *sort;
1489
1490 BUILD_BUG_ON(ARRAY_SIZE(dapm_up_seq) != SND_SOC_DAPM_TYPE_COUNT);
1491 BUILD_BUG_ON(ARRAY_SIZE(dapm_down_seq) != SND_SOC_DAPM_TYPE_COUNT);
1492
1493 if (power_up)
1494 sort = dapm_up_seq;
1495 else
1496 sort = dapm_down_seq;
1497
1498 WARN_ONCE(sort[a->id] == 0, "offset a->id %d not initialized\n", a->id);
1499 WARN_ONCE(sort[b->id] == 0, "offset b->id %d not initialized\n", b->id);
1500
1501 if (sort[a->id] != sort[b->id])
1502 return sort[a->id] - sort[b->id];
1503 if (a->subseq != b->subseq) {
1504 if (power_up)
1505 return a->subseq - b->subseq;
1506 else
1507 return b->subseq - a->subseq;
1508 }
1509 if (a->reg != b->reg)
1510 return a->reg - b->reg;
1511 if (a->dapm != b->dapm)
1512 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1513
1514 return 0;
1515 }
1516
1517 /* Insert a widget in order into a DAPM power sequence. */
dapm_seq_insert(struct snd_soc_dapm_widget * new_widget,struct list_head * list,bool power_up)1518 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1519 struct list_head *list,
1520 bool power_up)
1521 {
1522 struct snd_soc_dapm_widget *w;
1523
1524 list_for_each_entry(w, list, power_list)
1525 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1526 list_add_tail(&new_widget->power_list, &w->power_list);
1527 return;
1528 }
1529
1530 list_add_tail(&new_widget->power_list, list);
1531 }
1532
dapm_seq_check_event(struct snd_soc_card * card,struct snd_soc_dapm_widget * w,int event)1533 static void dapm_seq_check_event(struct snd_soc_card *card,
1534 struct snd_soc_dapm_widget *w, int event)
1535 {
1536 const char *ev_name;
1537 int power;
1538
1539 switch (event) {
1540 case SND_SOC_DAPM_PRE_PMU:
1541 ev_name = "PRE_PMU";
1542 power = 1;
1543 break;
1544 case SND_SOC_DAPM_POST_PMU:
1545 ev_name = "POST_PMU";
1546 power = 1;
1547 break;
1548 case SND_SOC_DAPM_PRE_PMD:
1549 ev_name = "PRE_PMD";
1550 power = 0;
1551 break;
1552 case SND_SOC_DAPM_POST_PMD:
1553 ev_name = "POST_PMD";
1554 power = 0;
1555 break;
1556 case SND_SOC_DAPM_WILL_PMU:
1557 ev_name = "WILL_PMU";
1558 power = 1;
1559 break;
1560 case SND_SOC_DAPM_WILL_PMD:
1561 ev_name = "WILL_PMD";
1562 power = 0;
1563 break;
1564 default:
1565 WARN(1, "Unknown event %d\n", event);
1566 return;
1567 }
1568
1569 if (w->new_power != power)
1570 return;
1571
1572 if (w->event && (w->event_flags & event)) {
1573 int ret;
1574
1575 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1576 w->name, ev_name);
1577 soc_dapm_async_complete(w->dapm);
1578 trace_snd_soc_dapm_widget_event_start(w, event);
1579 ret = w->event(w, NULL, event);
1580 trace_snd_soc_dapm_widget_event_done(w, event);
1581 if (ret < 0)
1582 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1583 ev_name, w->name, ret);
1584 }
1585 }
1586
1587 /* Apply the coalesced changes from a DAPM sequence */
dapm_seq_run_coalesced(struct snd_soc_card * card,struct list_head * pending)1588 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1589 struct list_head *pending)
1590 {
1591 struct snd_soc_dapm_context *dapm;
1592 struct snd_soc_dapm_widget *w;
1593 int reg;
1594 unsigned int value = 0;
1595 unsigned int mask = 0;
1596
1597 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1598 reg = w->reg;
1599 dapm = w->dapm;
1600
1601 list_for_each_entry(w, pending, power_list) {
1602 WARN_ON(reg != w->reg || dapm != w->dapm);
1603 w->power = w->new_power;
1604
1605 mask |= w->mask << w->shift;
1606 if (w->power)
1607 value |= w->on_val << w->shift;
1608 else
1609 value |= w->off_val << w->shift;
1610
1611 pop_dbg(dapm->dev, card->pop_time,
1612 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1613 w->name, reg, value, mask);
1614
1615 /* Check for events */
1616 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1617 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1618 }
1619
1620 if (reg >= 0) {
1621 /* Any widget will do, they should all be updating the
1622 * same register.
1623 */
1624
1625 pop_dbg(dapm->dev, card->pop_time,
1626 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1627 value, mask, reg, card->pop_time);
1628 pop_wait(card->pop_time);
1629 soc_dapm_update_bits(dapm, reg, mask, value);
1630 }
1631
1632 list_for_each_entry(w, pending, power_list) {
1633 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1634 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1635 }
1636 }
1637
1638 /* Apply a DAPM power sequence.
1639 *
1640 * We walk over a pre-sorted list of widgets to apply power to. In
1641 * order to minimise the number of writes to the device required
1642 * multiple widgets will be updated in a single write where possible.
1643 * Currently anything that requires more than a single write is not
1644 * handled.
1645 */
dapm_seq_run(struct snd_soc_card * card,struct list_head * list,int event,bool power_up)1646 static void dapm_seq_run(struct snd_soc_card *card,
1647 struct list_head *list, int event, bool power_up)
1648 {
1649 struct snd_soc_dapm_widget *w, *n;
1650 struct snd_soc_dapm_context *d;
1651 LIST_HEAD(pending);
1652 int cur_sort = -1;
1653 int cur_subseq = -1;
1654 int cur_reg = SND_SOC_NOPM;
1655 struct snd_soc_dapm_context *cur_dapm = NULL;
1656 int i;
1657 int *sort;
1658
1659 if (power_up)
1660 sort = dapm_up_seq;
1661 else
1662 sort = dapm_down_seq;
1663
1664 list_for_each_entry_safe(w, n, list, power_list) {
1665 int ret = 0;
1666
1667 /* Do we need to apply any queued changes? */
1668 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1669 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1670 if (!list_empty(&pending))
1671 dapm_seq_run_coalesced(card, &pending);
1672
1673 if (cur_dapm && cur_dapm->component) {
1674 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1675 if (sort[i] == cur_sort)
1676 snd_soc_component_seq_notifier(
1677 cur_dapm->component,
1678 i, cur_subseq);
1679 }
1680
1681 if (cur_dapm && w->dapm != cur_dapm)
1682 soc_dapm_async_complete(cur_dapm);
1683
1684 INIT_LIST_HEAD(&pending);
1685 cur_sort = -1;
1686 cur_subseq = INT_MIN;
1687 cur_reg = SND_SOC_NOPM;
1688 cur_dapm = NULL;
1689 }
1690
1691 switch (w->id) {
1692 case snd_soc_dapm_pre:
1693 if (!w->event)
1694 continue;
1695
1696 if (event == SND_SOC_DAPM_STREAM_START)
1697 ret = w->event(w,
1698 NULL, SND_SOC_DAPM_PRE_PMU);
1699 else if (event == SND_SOC_DAPM_STREAM_STOP)
1700 ret = w->event(w,
1701 NULL, SND_SOC_DAPM_PRE_PMD);
1702 break;
1703
1704 case snd_soc_dapm_post:
1705 if (!w->event)
1706 continue;
1707
1708 if (event == SND_SOC_DAPM_STREAM_START)
1709 ret = w->event(w,
1710 NULL, SND_SOC_DAPM_POST_PMU);
1711 else if (event == SND_SOC_DAPM_STREAM_STOP)
1712 ret = w->event(w,
1713 NULL, SND_SOC_DAPM_POST_PMD);
1714 break;
1715
1716 default:
1717 /* Queue it up for application */
1718 cur_sort = sort[w->id];
1719 cur_subseq = w->subseq;
1720 cur_reg = w->reg;
1721 cur_dapm = w->dapm;
1722 list_move(&w->power_list, &pending);
1723 break;
1724 }
1725
1726 if (ret < 0)
1727 dev_err(w->dapm->dev,
1728 "ASoC: Failed to apply widget power: %d\n", ret);
1729 }
1730
1731 if (!list_empty(&pending))
1732 dapm_seq_run_coalesced(card, &pending);
1733
1734 if (cur_dapm && cur_dapm->component) {
1735 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1736 if (sort[i] == cur_sort)
1737 snd_soc_component_seq_notifier(
1738 cur_dapm->component,
1739 i, cur_subseq);
1740 }
1741
1742 for_each_card_dapms(card, d)
1743 soc_dapm_async_complete(d);
1744 }
1745
dapm_widget_update(struct snd_soc_card * card)1746 static void dapm_widget_update(struct snd_soc_card *card)
1747 {
1748 struct snd_soc_dapm_update *update = card->update;
1749 struct snd_soc_dapm_widget_list *wlist;
1750 struct snd_soc_dapm_widget *w = NULL;
1751 unsigned int wi;
1752 int ret;
1753
1754 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1755 return;
1756
1757 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1758
1759 for_each_dapm_widgets(wlist, wi, w) {
1760 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1761 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1762 if (ret != 0)
1763 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1764 w->name, ret);
1765 }
1766 }
1767
1768 if (!w)
1769 return;
1770
1771 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1772 update->val);
1773 if (ret < 0)
1774 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1775 w->name, ret);
1776
1777 if (update->has_second_set) {
1778 ret = soc_dapm_update_bits(w->dapm, update->reg2,
1779 update->mask2, update->val2);
1780 if (ret < 0)
1781 dev_err(w->dapm->dev,
1782 "ASoC: %s DAPM update failed: %d\n",
1783 w->name, ret);
1784 }
1785
1786 for_each_dapm_widgets(wlist, wi, w) {
1787 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1788 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1789 if (ret != 0)
1790 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1791 w->name, ret);
1792 }
1793 }
1794 }
1795
1796 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1797 * they're changing state.
1798 */
dapm_pre_sequence_async(void * data,async_cookie_t cookie)1799 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1800 {
1801 struct snd_soc_dapm_context *d = data;
1802 int ret;
1803
1804 /* If we're off and we're not supposed to go into STANDBY */
1805 if (d->bias_level == SND_SOC_BIAS_OFF &&
1806 d->target_bias_level != SND_SOC_BIAS_OFF) {
1807 if (d->dev && cookie)
1808 pm_runtime_get_sync(d->dev);
1809
1810 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1811 if (ret != 0)
1812 dev_err(d->dev,
1813 "ASoC: Failed to turn on bias: %d\n", ret);
1814 }
1815
1816 /* Prepare for a transition to ON or away from ON */
1817 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1818 d->bias_level != SND_SOC_BIAS_ON) ||
1819 (d->target_bias_level != SND_SOC_BIAS_ON &&
1820 d->bias_level == SND_SOC_BIAS_ON)) {
1821 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1822 if (ret != 0)
1823 dev_err(d->dev,
1824 "ASoC: Failed to prepare bias: %d\n", ret);
1825 }
1826 }
1827
1828 /* Async callback run prior to DAPM sequences - brings to their final
1829 * state.
1830 */
dapm_post_sequence_async(void * data,async_cookie_t cookie)1831 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1832 {
1833 struct snd_soc_dapm_context *d = data;
1834 int ret;
1835
1836 /* If we just powered the last thing off drop to standby bias */
1837 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1838 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1839 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1840 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1841 if (ret != 0)
1842 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1843 ret);
1844 }
1845
1846 /* If we're in standby and can support bias off then do that */
1847 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1848 d->target_bias_level == SND_SOC_BIAS_OFF) {
1849 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1850 if (ret != 0)
1851 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1852 ret);
1853
1854 if (d->dev && cookie)
1855 pm_runtime_put(d->dev);
1856 }
1857
1858 /* If we just powered up then move to active bias */
1859 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1860 d->target_bias_level == SND_SOC_BIAS_ON) {
1861 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1862 if (ret != 0)
1863 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1864 ret);
1865 }
1866 }
1867
dapm_widget_set_peer_power(struct snd_soc_dapm_widget * peer,bool power,bool connect)1868 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1869 bool power, bool connect)
1870 {
1871 /* If a connection is being made or broken then that update
1872 * will have marked the peer dirty, otherwise the widgets are
1873 * not connected and this update has no impact. */
1874 if (!connect)
1875 return;
1876
1877 /* If the peer is already in the state we're moving to then we
1878 * won't have an impact on it. */
1879 if (power != peer->power)
1880 dapm_mark_dirty(peer, "peer state change");
1881 }
1882
dapm_power_one_widget(struct snd_soc_dapm_widget * w,struct list_head * up_list,struct list_head * down_list)1883 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1884 struct list_head *up_list,
1885 struct list_head *down_list)
1886 {
1887 struct snd_soc_dapm_path *path;
1888 int power;
1889
1890 switch (w->id) {
1891 case snd_soc_dapm_pre:
1892 power = 0;
1893 goto end;
1894 case snd_soc_dapm_post:
1895 power = 1;
1896 goto end;
1897 default:
1898 break;
1899 }
1900
1901 power = dapm_widget_power_check(w);
1902
1903 if (w->power == power)
1904 return;
1905
1906 trace_snd_soc_dapm_widget_power(w, power);
1907
1908 /*
1909 * If we changed our power state perhaps our neigbours
1910 * changed also.
1911 */
1912 snd_soc_dapm_widget_for_each_source_path(w, path)
1913 dapm_widget_set_peer_power(path->source, power, path->connect);
1914
1915 /*
1916 * Supplies can't affect their outputs, only their inputs
1917 */
1918 if (!w->is_supply)
1919 snd_soc_dapm_widget_for_each_sink_path(w, path)
1920 dapm_widget_set_peer_power(path->sink, power, path->connect);
1921
1922 end:
1923 if (power)
1924 dapm_seq_insert(w, up_list, true);
1925 else
1926 dapm_seq_insert(w, down_list, false);
1927 }
1928
dapm_idle_bias_off(struct snd_soc_dapm_context * dapm)1929 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1930 {
1931 if (dapm->idle_bias_off)
1932 return true;
1933
1934 switch (snd_power_get_state(dapm->card->snd_card)) {
1935 case SNDRV_CTL_POWER_D3hot:
1936 case SNDRV_CTL_POWER_D3cold:
1937 return dapm->suspend_bias_off;
1938 default:
1939 break;
1940 }
1941
1942 return false;
1943 }
1944
1945 /*
1946 * Scan each dapm widget for complete audio path.
1947 * A complete path is a route that has valid endpoints i.e.:-
1948 *
1949 * o DAC to output pin.
1950 * o Input pin to ADC.
1951 * o Input pin to Output pin (bypass, sidetone)
1952 * o DAC to ADC (loopback).
1953 */
dapm_power_widgets(struct snd_soc_card * card,int event)1954 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1955 {
1956 struct snd_soc_dapm_widget *w;
1957 struct snd_soc_dapm_context *d;
1958 LIST_HEAD(up_list);
1959 LIST_HEAD(down_list);
1960 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1961 enum snd_soc_bias_level bias;
1962 int ret;
1963
1964 snd_soc_dapm_mutex_assert_held(card);
1965
1966 trace_snd_soc_dapm_start(card, event);
1967
1968 for_each_card_dapms(card, d) {
1969 if (dapm_idle_bias_off(d))
1970 d->target_bias_level = SND_SOC_BIAS_OFF;
1971 else
1972 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1973 }
1974
1975 dapm_reset(card);
1976
1977 /* Check which widgets we need to power and store them in
1978 * lists indicating if they should be powered up or down. We
1979 * only check widgets that have been flagged as dirty but note
1980 * that new widgets may be added to the dirty list while we
1981 * iterate.
1982 */
1983 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1984 dapm_power_one_widget(w, &up_list, &down_list);
1985 }
1986
1987 for_each_card_widgets(card, w) {
1988 switch (w->id) {
1989 case snd_soc_dapm_pre:
1990 case snd_soc_dapm_post:
1991 /* These widgets always need to be powered */
1992 break;
1993 default:
1994 list_del_init(&w->dirty);
1995 break;
1996 }
1997
1998 if (w->new_power) {
1999 d = w->dapm;
2000
2001 /* Supplies and micbiases only bring the
2002 * context up to STANDBY as unless something
2003 * else is active and passing audio they
2004 * generally don't require full power. Signal
2005 * generators are virtual pins and have no
2006 * power impact themselves.
2007 */
2008 switch (w->id) {
2009 case snd_soc_dapm_siggen:
2010 case snd_soc_dapm_vmid:
2011 break;
2012 case snd_soc_dapm_supply:
2013 case snd_soc_dapm_regulator_supply:
2014 case snd_soc_dapm_pinctrl:
2015 case snd_soc_dapm_clock_supply:
2016 case snd_soc_dapm_micbias:
2017 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
2018 d->target_bias_level = SND_SOC_BIAS_STANDBY;
2019 break;
2020 default:
2021 d->target_bias_level = SND_SOC_BIAS_ON;
2022 break;
2023 }
2024 }
2025
2026 }
2027
2028 /* Force all contexts in the card to the same bias state if
2029 * they're not ground referenced.
2030 */
2031 bias = SND_SOC_BIAS_OFF;
2032 for_each_card_dapms(card, d)
2033 if (d->target_bias_level > bias)
2034 bias = d->target_bias_level;
2035 for_each_card_dapms(card, d)
2036 if (!dapm_idle_bias_off(d))
2037 d->target_bias_level = bias;
2038
2039 trace_snd_soc_dapm_walk_done(card);
2040
2041 /* Run card bias changes at first */
2042 dapm_pre_sequence_async(&card->dapm, 0);
2043 /* Run other bias changes in parallel */
2044 for_each_card_dapms(card, d) {
2045 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2046 async_schedule_domain(dapm_pre_sequence_async, d,
2047 &async_domain);
2048 }
2049 async_synchronize_full_domain(&async_domain);
2050
2051 list_for_each_entry(w, &down_list, power_list) {
2052 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
2053 }
2054
2055 list_for_each_entry(w, &up_list, power_list) {
2056 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
2057 }
2058
2059 /* Power down widgets first; try to avoid amplifying pops. */
2060 dapm_seq_run(card, &down_list, event, false);
2061
2062 dapm_widget_update(card);
2063
2064 /* Now power up. */
2065 dapm_seq_run(card, &up_list, event, true);
2066
2067 /* Run all the bias changes in parallel */
2068 for_each_card_dapms(card, d) {
2069 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2070 async_schedule_domain(dapm_post_sequence_async, d,
2071 &async_domain);
2072 }
2073 async_synchronize_full_domain(&async_domain);
2074 /* Run card bias changes at last */
2075 dapm_post_sequence_async(&card->dapm, 0);
2076
2077 /* do we need to notify any clients that DAPM event is complete */
2078 for_each_card_dapms(card, d) {
2079 if (!d->component)
2080 continue;
2081
2082 ret = snd_soc_component_stream_event(d->component, event);
2083 if (ret < 0)
2084 return ret;
2085 }
2086
2087 pop_dbg(card->dev, card->pop_time,
2088 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
2089 pop_wait(card->pop_time);
2090
2091 trace_snd_soc_dapm_done(card, event);
2092
2093 return 0;
2094 }
2095
2096 #ifdef CONFIG_DEBUG_FS
2097
2098 static const char * const snd_soc_dapm_type_name[] = {
2099 [snd_soc_dapm_input] = "input",
2100 [snd_soc_dapm_output] = "output",
2101 [snd_soc_dapm_mux] = "mux",
2102 [snd_soc_dapm_demux] = "demux",
2103 [snd_soc_dapm_mixer] = "mixer",
2104 [snd_soc_dapm_mixer_named_ctl] = "mixer_named_ctl",
2105 [snd_soc_dapm_pga] = "pga",
2106 [snd_soc_dapm_out_drv] = "out_drv",
2107 [snd_soc_dapm_adc] = "adc",
2108 [snd_soc_dapm_dac] = "dac",
2109 [snd_soc_dapm_micbias] = "micbias",
2110 [snd_soc_dapm_mic] = "mic",
2111 [snd_soc_dapm_hp] = "hp",
2112 [snd_soc_dapm_spk] = "spk",
2113 [snd_soc_dapm_line] = "line",
2114 [snd_soc_dapm_switch] = "switch",
2115 [snd_soc_dapm_vmid] = "vmid",
2116 [snd_soc_dapm_pre] = "pre",
2117 [snd_soc_dapm_post] = "post",
2118 [snd_soc_dapm_supply] = "supply",
2119 [snd_soc_dapm_pinctrl] = "pinctrl",
2120 [snd_soc_dapm_regulator_supply] = "regulator_supply",
2121 [snd_soc_dapm_clock_supply] = "clock_supply",
2122 [snd_soc_dapm_aif_in] = "aif_in",
2123 [snd_soc_dapm_aif_out] = "aif_out",
2124 [snd_soc_dapm_siggen] = "siggen",
2125 [snd_soc_dapm_sink] = "sink",
2126 [snd_soc_dapm_dai_in] = "dai_in",
2127 [snd_soc_dapm_dai_out] = "dai_out",
2128 [snd_soc_dapm_dai_link] = "dai_link",
2129 [snd_soc_dapm_kcontrol] = "kcontrol",
2130 [snd_soc_dapm_buffer] = "buffer",
2131 [snd_soc_dapm_scheduler] = "scheduler",
2132 [snd_soc_dapm_effect] = "effect",
2133 [snd_soc_dapm_src] = "src",
2134 [snd_soc_dapm_asrc] = "asrc",
2135 [snd_soc_dapm_encoder] = "encoder",
2136 [snd_soc_dapm_decoder] = "decoder",
2137 };
2138
dapm_widget_power_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2139 static ssize_t dapm_widget_power_read_file(struct file *file,
2140 char __user *user_buf,
2141 size_t count, loff_t *ppos)
2142 {
2143 struct snd_soc_dapm_widget *w = file->private_data;
2144 enum snd_soc_dapm_direction dir, rdir;
2145 char *buf;
2146 int in, out;
2147 ssize_t ret;
2148 struct snd_soc_dapm_path *p = NULL;
2149 const char *c_name;
2150
2151 BUILD_BUG_ON(ARRAY_SIZE(snd_soc_dapm_type_name) != SND_SOC_DAPM_TYPE_COUNT);
2152
2153 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
2154 if (!buf)
2155 return -ENOMEM;
2156
2157 snd_soc_dapm_mutex_lock_root(w->dapm);
2158
2159 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
2160 if (w->is_supply) {
2161 in = 0;
2162 out = 0;
2163 } else {
2164 in = is_connected_input_ep(w, NULL, NULL);
2165 out = is_connected_output_ep(w, NULL, NULL);
2166 }
2167
2168 ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
2169 w->name, w->power ? "On" : "Off",
2170 w->force ? " (forced)" : "", in, out);
2171
2172 if (w->reg >= 0)
2173 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2174 " - R%d(0x%x) mask 0x%x",
2175 w->reg, w->reg, w->mask << w->shift);
2176
2177 ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
2178
2179 if (w->sname)
2180 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
2181 w->sname,
2182 w->active ? "active" : "inactive");
2183
2184 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " widget-type %s\n",
2185 snd_soc_dapm_type_name[w->id]);
2186
2187 snd_soc_dapm_for_each_direction(dir) {
2188 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
2189 snd_soc_dapm_widget_for_each_path(w, dir, p) {
2190 if (p->connected && !p->connected(p->source, p->sink))
2191 continue;
2192
2193 if (!p->connect)
2194 continue;
2195
2196 c_name = p->node[rdir]->dapm->component ?
2197 p->node[rdir]->dapm->component->name : NULL;
2198 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2199 " %s \"%s\" \"%s\" \"%s\"\n",
2200 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
2201 p->name ? p->name : "static",
2202 p->node[rdir]->name, c_name);
2203 }
2204 }
2205
2206 snd_soc_dapm_mutex_unlock(w->dapm);
2207
2208 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2209
2210 kfree(buf);
2211 return ret;
2212 }
2213
2214 static const struct file_operations dapm_widget_power_fops = {
2215 .open = simple_open,
2216 .read = dapm_widget_power_read_file,
2217 .llseek = default_llseek,
2218 };
2219
dapm_bias_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2220 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2221 size_t count, loff_t *ppos)
2222 {
2223 struct snd_soc_dapm_context *dapm = file->private_data;
2224 char *level;
2225
2226 switch (dapm->bias_level) {
2227 case SND_SOC_BIAS_ON:
2228 level = "On\n";
2229 break;
2230 case SND_SOC_BIAS_PREPARE:
2231 level = "Prepare\n";
2232 break;
2233 case SND_SOC_BIAS_STANDBY:
2234 level = "Standby\n";
2235 break;
2236 case SND_SOC_BIAS_OFF:
2237 level = "Off\n";
2238 break;
2239 default:
2240 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2241 level = "Unknown\n";
2242 break;
2243 }
2244
2245 return simple_read_from_buffer(user_buf, count, ppos, level,
2246 strlen(level));
2247 }
2248
2249 static const struct file_operations dapm_bias_fops = {
2250 .open = simple_open,
2251 .read = dapm_bias_read_file,
2252 .llseek = default_llseek,
2253 };
2254
snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context * dapm,struct dentry * parent)2255 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2256 struct dentry *parent)
2257 {
2258 if (!parent || IS_ERR(parent))
2259 return;
2260
2261 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2262
2263 debugfs_create_file("bias_level", 0444, dapm->debugfs_dapm, dapm,
2264 &dapm_bias_fops);
2265 }
2266
dapm_debugfs_add_widget(struct snd_soc_dapm_widget * w)2267 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2268 {
2269 struct snd_soc_dapm_context *dapm = w->dapm;
2270
2271 if (!dapm->debugfs_dapm || !w->name)
2272 return;
2273
2274 debugfs_create_file(w->name, 0444, dapm->debugfs_dapm, w,
2275 &dapm_widget_power_fops);
2276 }
2277
dapm_debugfs_free_widget(struct snd_soc_dapm_widget * w)2278 static void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2279 {
2280 struct snd_soc_dapm_context *dapm = w->dapm;
2281
2282 if (!dapm->debugfs_dapm || !w->name)
2283 return;
2284
2285 debugfs_lookup_and_remove(w->name, dapm->debugfs_dapm);
2286 }
2287
dapm_debugfs_cleanup(struct snd_soc_dapm_context * dapm)2288 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2289 {
2290 debugfs_remove_recursive(dapm->debugfs_dapm);
2291 dapm->debugfs_dapm = NULL;
2292 }
2293
2294 #else
snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context * dapm,struct dentry * parent)2295 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2296 struct dentry *parent)
2297 {
2298 }
2299
dapm_debugfs_add_widget(struct snd_soc_dapm_widget * w)2300 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2301 {
2302 }
2303
dapm_debugfs_free_widget(struct snd_soc_dapm_widget * w)2304 static inline void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2305 {
2306 }
2307
dapm_debugfs_cleanup(struct snd_soc_dapm_context * dapm)2308 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2309 {
2310 }
2311
2312 #endif
2313
2314 /*
2315 * soc_dapm_connect_path() - Connects or disconnects a path
2316 * @path: The path to update
2317 * @connect: The new connect state of the path. True if the path is connected,
2318 * false if it is disconnected.
2319 * @reason: The reason why the path changed (for debugging only)
2320 */
soc_dapm_connect_path(struct snd_soc_dapm_path * path,bool connect,const char * reason)2321 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2322 bool connect, const char *reason)
2323 {
2324 if (path->connect == connect)
2325 return;
2326
2327 path->connect = connect;
2328 dapm_mark_dirty(path->source, reason);
2329 dapm_mark_dirty(path->sink, reason);
2330 dapm_path_invalidate(path);
2331 }
2332
2333 /* test and update the power status of a mux widget */
soc_dapm_mux_update_power(struct snd_soc_card * card,struct snd_kcontrol * kcontrol,int mux,struct soc_enum * e)2334 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2335 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2336 {
2337 struct snd_soc_dapm_path *path;
2338 int found = 0;
2339 bool connect;
2340
2341 snd_soc_dapm_mutex_assert_held(card);
2342
2343 /* find dapm widget path assoc with kcontrol */
2344 dapm_kcontrol_for_each_path(path, kcontrol) {
2345 found = 1;
2346 /* we now need to match the string in the enum to the path */
2347 if (e && !(strcmp(path->name, e->texts[mux])))
2348 connect = true;
2349 else
2350 connect = false;
2351
2352 soc_dapm_connect_path(path, connect, "mux update");
2353 }
2354
2355 if (found)
2356 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2357
2358 return found;
2359 }
2360
snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context * dapm,struct snd_kcontrol * kcontrol,int mux,struct soc_enum * e,struct snd_soc_dapm_update * update)2361 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2362 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2363 struct snd_soc_dapm_update *update)
2364 {
2365 struct snd_soc_card *card = dapm->card;
2366 int ret;
2367
2368 snd_soc_dapm_mutex_lock(card);
2369 card->update = update;
2370 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2371 card->update = NULL;
2372 snd_soc_dapm_mutex_unlock(card);
2373 if (ret > 0)
2374 snd_soc_dpcm_runtime_update(card);
2375 return ret;
2376 }
2377 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2378
2379 /* test and update the power status of a mixer or switch widget */
soc_dapm_mixer_update_power(struct snd_soc_card * card,struct snd_kcontrol * kcontrol,int connect,int rconnect)2380 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2381 struct snd_kcontrol *kcontrol,
2382 int connect, int rconnect)
2383 {
2384 struct snd_soc_dapm_path *path;
2385 int found = 0;
2386
2387 snd_soc_dapm_mutex_assert_held(card);
2388
2389 /* find dapm widget path assoc with kcontrol */
2390 dapm_kcontrol_for_each_path(path, kcontrol) {
2391 /*
2392 * Ideally this function should support any number of
2393 * paths and channels. But since kcontrols only come
2394 * in mono and stereo variants, we are limited to 2
2395 * channels.
2396 *
2397 * The following code assumes for stereo controls the
2398 * first path (when 'found == 0') is the left channel,
2399 * and all remaining paths (when 'found == 1') are the
2400 * right channel.
2401 *
2402 * A stereo control is signified by a valid 'rconnect'
2403 * value, either 0 for unconnected, or >= 0 for connected.
2404 * This is chosen instead of using snd_soc_volsw_is_stereo,
2405 * so that the behavior of snd_soc_dapm_mixer_update_power
2406 * doesn't change even when the kcontrol passed in is
2407 * stereo.
2408 *
2409 * It passes 'connect' as the path connect status for
2410 * the left channel, and 'rconnect' for the right
2411 * channel.
2412 */
2413 if (found && rconnect >= 0)
2414 soc_dapm_connect_path(path, rconnect, "mixer update");
2415 else
2416 soc_dapm_connect_path(path, connect, "mixer update");
2417 found = 1;
2418 }
2419
2420 if (found)
2421 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2422
2423 return found;
2424 }
2425
snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context * dapm,struct snd_kcontrol * kcontrol,int connect,struct snd_soc_dapm_update * update)2426 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2427 struct snd_kcontrol *kcontrol, int connect,
2428 struct snd_soc_dapm_update *update)
2429 {
2430 struct snd_soc_card *card = dapm->card;
2431 int ret;
2432
2433 snd_soc_dapm_mutex_lock(card);
2434 card->update = update;
2435 ret = soc_dapm_mixer_update_power(card, kcontrol, connect, -1);
2436 card->update = NULL;
2437 snd_soc_dapm_mutex_unlock(card);
2438 if (ret > 0)
2439 snd_soc_dpcm_runtime_update(card);
2440 return ret;
2441 }
2442 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2443
dapm_widget_show_component(struct snd_soc_component * cmpnt,char * buf,int count)2444 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2445 char *buf, int count)
2446 {
2447 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2448 struct snd_soc_dapm_widget *w;
2449 char *state = "not set";
2450
2451 /* card won't be set for the dummy component, as a spot fix
2452 * we're checking for that case specifically here but in future
2453 * we will ensure that the dummy component looks like others.
2454 */
2455 if (!cmpnt->card)
2456 return 0;
2457
2458 for_each_card_widgets(cmpnt->card, w) {
2459 if (w->dapm != dapm)
2460 continue;
2461
2462 /* only display widgets that burn power */
2463 switch (w->id) {
2464 case snd_soc_dapm_hp:
2465 case snd_soc_dapm_mic:
2466 case snd_soc_dapm_spk:
2467 case snd_soc_dapm_line:
2468 case snd_soc_dapm_micbias:
2469 case snd_soc_dapm_dac:
2470 case snd_soc_dapm_adc:
2471 case snd_soc_dapm_pga:
2472 case snd_soc_dapm_effect:
2473 case snd_soc_dapm_out_drv:
2474 case snd_soc_dapm_mixer:
2475 case snd_soc_dapm_mixer_named_ctl:
2476 case snd_soc_dapm_supply:
2477 case snd_soc_dapm_regulator_supply:
2478 case snd_soc_dapm_pinctrl:
2479 case snd_soc_dapm_clock_supply:
2480 if (w->name)
2481 count += sysfs_emit_at(buf, count, "%s: %s\n",
2482 w->name, w->power ? "On":"Off");
2483 break;
2484 default:
2485 break;
2486 }
2487 }
2488
2489 switch (snd_soc_dapm_get_bias_level(dapm)) {
2490 case SND_SOC_BIAS_ON:
2491 state = "On";
2492 break;
2493 case SND_SOC_BIAS_PREPARE:
2494 state = "Prepare";
2495 break;
2496 case SND_SOC_BIAS_STANDBY:
2497 state = "Standby";
2498 break;
2499 case SND_SOC_BIAS_OFF:
2500 state = "Off";
2501 break;
2502 }
2503 count += sysfs_emit_at(buf, count, "PM State: %s\n", state);
2504
2505 return count;
2506 }
2507
2508 /* show dapm widget status in sys fs */
dapm_widget_show(struct device * dev,struct device_attribute * attr,char * buf)2509 static ssize_t dapm_widget_show(struct device *dev,
2510 struct device_attribute *attr, char *buf)
2511 {
2512 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2513 struct snd_soc_dai *codec_dai;
2514 int i, count = 0;
2515
2516 snd_soc_dapm_mutex_lock_root(rtd->card);
2517
2518 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2519 struct snd_soc_component *cmpnt = codec_dai->component;
2520
2521 count = dapm_widget_show_component(cmpnt, buf, count);
2522 }
2523
2524 snd_soc_dapm_mutex_unlock(rtd->card);
2525
2526 return count;
2527 }
2528
2529 static DEVICE_ATTR_RO(dapm_widget);
2530
2531 struct attribute *soc_dapm_dev_attrs[] = {
2532 &dev_attr_dapm_widget.attr,
2533 NULL
2534 };
2535
dapm_free_path(struct snd_soc_dapm_path * path)2536 static void dapm_free_path(struct snd_soc_dapm_path *path)
2537 {
2538 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2539 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2540 list_del(&path->list_kcontrol);
2541 list_del(&path->list);
2542 kfree(path);
2543 }
2544
2545 /**
2546 * snd_soc_dapm_free_widget - Free specified widget
2547 * @w: widget to free
2548 *
2549 * Removes widget from all paths and frees memory occupied by it.
2550 */
snd_soc_dapm_free_widget(struct snd_soc_dapm_widget * w)2551 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2552 {
2553 struct snd_soc_dapm_path *p, *next_p;
2554 enum snd_soc_dapm_direction dir;
2555
2556 if (!w)
2557 return;
2558
2559 list_del(&w->list);
2560 list_del(&w->dirty);
2561 /*
2562 * remove source and sink paths associated to this widget.
2563 * While removing the path, remove reference to it from both
2564 * source and sink widgets so that path is removed only once.
2565 */
2566 snd_soc_dapm_for_each_direction(dir) {
2567 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2568 dapm_free_path(p);
2569 }
2570
2571 dapm_debugfs_free_widget(w);
2572
2573 kfree(w->kcontrols);
2574 kfree_const(w->name);
2575 kfree_const(w->sname);
2576 kfree(w);
2577 }
2578 EXPORT_SYMBOL_GPL(snd_soc_dapm_free_widget);
2579
2580 /* free all dapm widgets and resources */
dapm_free_widgets(struct snd_soc_dapm_context * dapm)2581 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2582 {
2583 struct snd_soc_dapm_widget *w, *next_w;
2584
2585 for_each_card_widgets_safe(dapm->card, w, next_w) {
2586 if (w->dapm != dapm)
2587 continue;
2588 snd_soc_dapm_free_widget(w);
2589 }
2590
2591 dapm->wcache_sink = NULL;
2592 dapm->wcache_source = NULL;
2593 }
2594
dapm_find_widget(struct snd_soc_dapm_context * dapm,const char * pin,bool search_other_contexts)2595 static struct snd_soc_dapm_widget *dapm_find_widget(
2596 struct snd_soc_dapm_context *dapm, const char *pin,
2597 bool search_other_contexts)
2598 {
2599 struct snd_soc_dapm_widget *w;
2600 struct snd_soc_dapm_widget *fallback = NULL;
2601 char prefixed_pin[80];
2602 const char *pin_name;
2603 const char *prefix = soc_dapm_prefix(dapm);
2604
2605 if (prefix) {
2606 snprintf(prefixed_pin, sizeof(prefixed_pin), "%s %s",
2607 prefix, pin);
2608 pin_name = prefixed_pin;
2609 } else {
2610 pin_name = pin;
2611 }
2612
2613 for_each_card_widgets(dapm->card, w) {
2614 if (!strcmp(w->name, pin_name)) {
2615 if (w->dapm == dapm)
2616 return w;
2617 else
2618 fallback = w;
2619 }
2620 }
2621
2622 if (search_other_contexts)
2623 return fallback;
2624
2625 return NULL;
2626 }
2627
2628 /*
2629 * set the DAPM pin status:
2630 * returns 1 when the value has been updated, 0 when unchanged, or a negative
2631 * error code; called from kcontrol put callback
2632 */
__snd_soc_dapm_set_pin(struct snd_soc_dapm_context * dapm,const char * pin,int status)2633 static int __snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2634 const char *pin, int status)
2635 {
2636 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2637 int ret = 0;
2638
2639 dapm_assert_locked(dapm);
2640
2641 if (!w) {
2642 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2643 return -EINVAL;
2644 }
2645
2646 if (w->connected != status) {
2647 dapm_mark_dirty(w, "pin configuration");
2648 dapm_widget_invalidate_input_paths(w);
2649 dapm_widget_invalidate_output_paths(w);
2650 ret = 1;
2651 }
2652
2653 w->connected = status;
2654 if (status == 0)
2655 w->force = 0;
2656
2657 return ret;
2658 }
2659
2660 /*
2661 * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful;
2662 * called from several API functions below
2663 */
snd_soc_dapm_set_pin(struct snd_soc_dapm_context * dapm,const char * pin,int status)2664 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2665 const char *pin, int status)
2666 {
2667 int ret = __snd_soc_dapm_set_pin(dapm, pin, status);
2668
2669 return ret < 0 ? ret : 0;
2670 }
2671
2672 /**
2673 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2674 * @dapm: DAPM context
2675 *
2676 * Walks all dapm audio paths and powers widgets according to their
2677 * stream or path usage.
2678 *
2679 * Requires external locking.
2680 *
2681 * Returns 0 for success.
2682 */
snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context * dapm)2683 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2684 {
2685 /*
2686 * Suppress early reports (eg, jacks syncing their state) to avoid
2687 * silly DAPM runs during card startup.
2688 */
2689 if (!snd_soc_card_is_instantiated(dapm->card))
2690 return 0;
2691
2692 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2693 }
2694 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2695
2696 /**
2697 * snd_soc_dapm_sync - scan and power dapm paths
2698 * @dapm: DAPM context
2699 *
2700 * Walks all dapm audio paths and powers widgets according to their
2701 * stream or path usage.
2702 *
2703 * Returns 0 for success.
2704 */
snd_soc_dapm_sync(struct snd_soc_dapm_context * dapm)2705 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2706 {
2707 int ret;
2708
2709 snd_soc_dapm_mutex_lock(dapm);
2710 ret = snd_soc_dapm_sync_unlocked(dapm);
2711 snd_soc_dapm_mutex_unlock(dapm);
2712 return ret;
2713 }
2714 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2715
dapm_update_dai_chan(struct snd_soc_dapm_path * p,struct snd_soc_dapm_widget * w,int channels)2716 static int dapm_update_dai_chan(struct snd_soc_dapm_path *p,
2717 struct snd_soc_dapm_widget *w,
2718 int channels)
2719 {
2720 switch (w->id) {
2721 case snd_soc_dapm_aif_out:
2722 case snd_soc_dapm_aif_in:
2723 break;
2724 default:
2725 return 0;
2726 }
2727
2728 dev_dbg(w->dapm->dev, "%s DAI route %s -> %s\n",
2729 w->channel < channels ? "Connecting" : "Disconnecting",
2730 p->source->name, p->sink->name);
2731
2732 if (w->channel < channels)
2733 soc_dapm_connect_path(p, true, "dai update");
2734 else
2735 soc_dapm_connect_path(p, false, "dai update");
2736
2737 return 0;
2738 }
2739
dapm_update_dai_unlocked(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)2740 static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
2741 struct snd_pcm_hw_params *params,
2742 struct snd_soc_dai *dai)
2743 {
2744 int dir = substream->stream;
2745 int channels = params_channels(params);
2746 struct snd_soc_dapm_path *p;
2747 struct snd_soc_dapm_widget *w;
2748 int ret;
2749
2750 w = snd_soc_dai_get_widget(dai, dir);
2751
2752 if (!w)
2753 return 0;
2754
2755 dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name,
2756 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
2757
2758 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2759 ret = dapm_update_dai_chan(p, p->sink, channels);
2760 if (ret < 0)
2761 return ret;
2762 }
2763
2764 snd_soc_dapm_widget_for_each_source_path(w, p) {
2765 ret = dapm_update_dai_chan(p, p->source, channels);
2766 if (ret < 0)
2767 return ret;
2768 }
2769
2770 return 0;
2771 }
2772
snd_soc_dapm_update_dai(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)2773 int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
2774 struct snd_pcm_hw_params *params,
2775 struct snd_soc_dai *dai)
2776 {
2777 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
2778 int ret;
2779
2780 snd_soc_dapm_mutex_lock(rtd->card);
2781 ret = dapm_update_dai_unlocked(substream, params, dai);
2782 snd_soc_dapm_mutex_unlock(rtd->card);
2783
2784 return ret;
2785 }
2786 EXPORT_SYMBOL_GPL(snd_soc_dapm_update_dai);
2787
snd_soc_dapm_widget_name_cmp(struct snd_soc_dapm_widget * widget,const char * s)2788 int snd_soc_dapm_widget_name_cmp(struct snd_soc_dapm_widget *widget, const char *s)
2789 {
2790 struct snd_soc_component *component = snd_soc_dapm_to_component(widget->dapm);
2791 const char *wname = widget->name;
2792
2793 if (component->name_prefix)
2794 wname += strlen(component->name_prefix) + 1; /* plus space */
2795
2796 return strcmp(wname, s);
2797 }
2798 EXPORT_SYMBOL_GPL(snd_soc_dapm_widget_name_cmp);
2799
2800 /*
2801 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2802 * @w: The widget for which to update the flags
2803 *
2804 * Some widgets have a dynamic category which depends on which neighbors they
2805 * are connected to. This function update the category for these widgets.
2806 *
2807 * This function must be called whenever a path is added or removed to a widget.
2808 */
dapm_update_widget_flags(struct snd_soc_dapm_widget * w)2809 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2810 {
2811 enum snd_soc_dapm_direction dir;
2812 struct snd_soc_dapm_path *p;
2813 unsigned int ep;
2814
2815 switch (w->id) {
2816 case snd_soc_dapm_input:
2817 /* On a fully routed card an input is never a source */
2818 if (w->dapm->card->fully_routed)
2819 return;
2820 ep = SND_SOC_DAPM_EP_SOURCE;
2821 snd_soc_dapm_widget_for_each_source_path(w, p) {
2822 if (p->source->id == snd_soc_dapm_micbias ||
2823 p->source->id == snd_soc_dapm_mic ||
2824 p->source->id == snd_soc_dapm_line ||
2825 p->source->id == snd_soc_dapm_output) {
2826 ep = 0;
2827 break;
2828 }
2829 }
2830 break;
2831 case snd_soc_dapm_output:
2832 /* On a fully routed card a output is never a sink */
2833 if (w->dapm->card->fully_routed)
2834 return;
2835 ep = SND_SOC_DAPM_EP_SINK;
2836 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2837 if (p->sink->id == snd_soc_dapm_spk ||
2838 p->sink->id == snd_soc_dapm_hp ||
2839 p->sink->id == snd_soc_dapm_line ||
2840 p->sink->id == snd_soc_dapm_input) {
2841 ep = 0;
2842 break;
2843 }
2844 }
2845 break;
2846 case snd_soc_dapm_line:
2847 ep = 0;
2848 snd_soc_dapm_for_each_direction(dir) {
2849 if (!list_empty(&w->edges[dir]))
2850 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2851 }
2852 break;
2853 default:
2854 return;
2855 }
2856
2857 w->is_ep = ep;
2858 }
2859
snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context * dapm,struct snd_soc_dapm_widget * source,struct snd_soc_dapm_widget * sink,const char * control)2860 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2861 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2862 const char *control)
2863 {
2864 bool dynamic_source = false;
2865 bool dynamic_sink = false;
2866
2867 if (!control)
2868 return 0;
2869
2870 switch (source->id) {
2871 case snd_soc_dapm_demux:
2872 dynamic_source = true;
2873 break;
2874 default:
2875 break;
2876 }
2877
2878 switch (sink->id) {
2879 case snd_soc_dapm_mux:
2880 case snd_soc_dapm_switch:
2881 case snd_soc_dapm_mixer:
2882 case snd_soc_dapm_mixer_named_ctl:
2883 dynamic_sink = true;
2884 break;
2885 default:
2886 break;
2887 }
2888
2889 if (dynamic_source && dynamic_sink) {
2890 dev_err(dapm->dev,
2891 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2892 source->name, control, sink->name);
2893 return -EINVAL;
2894 } else if (!dynamic_source && !dynamic_sink) {
2895 dev_err(dapm->dev,
2896 "Control not supported for path %s -> [%s] -> %s\n",
2897 source->name, control, sink->name);
2898 return -EINVAL;
2899 }
2900
2901 return 0;
2902 }
2903
snd_soc_dapm_add_path(struct snd_soc_dapm_context * dapm,struct snd_soc_dapm_widget * wsource,struct snd_soc_dapm_widget * wsink,const char * control,int (* connected)(struct snd_soc_dapm_widget * source,struct snd_soc_dapm_widget * sink))2904 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2905 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2906 const char *control,
2907 int (*connected)(struct snd_soc_dapm_widget *source,
2908 struct snd_soc_dapm_widget *sink))
2909 {
2910 enum snd_soc_dapm_direction dir;
2911 struct snd_soc_dapm_path *path;
2912 int ret;
2913
2914 if (wsink->is_supply && !wsource->is_supply) {
2915 dev_err(dapm->dev,
2916 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2917 wsource->name, wsink->name);
2918 return -EINVAL;
2919 }
2920
2921 if (connected && !wsource->is_supply) {
2922 dev_err(dapm->dev,
2923 "connected() callback only supported for supply widgets (%s -> %s)\n",
2924 wsource->name, wsink->name);
2925 return -EINVAL;
2926 }
2927
2928 if (wsource->is_supply && control) {
2929 dev_err(dapm->dev,
2930 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2931 wsource->name, control, wsink->name);
2932 return -EINVAL;
2933 }
2934
2935 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2936 if (ret)
2937 return ret;
2938
2939 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2940 if (!path)
2941 return -ENOMEM;
2942
2943 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2944 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2945
2946 path->connected = connected;
2947 INIT_LIST_HEAD(&path->list);
2948 INIT_LIST_HEAD(&path->list_kcontrol);
2949
2950 if (wsource->is_supply || wsink->is_supply)
2951 path->is_supply = 1;
2952
2953 /* connect static paths */
2954 if (control == NULL) {
2955 path->connect = 1;
2956 } else {
2957 switch (wsource->id) {
2958 case snd_soc_dapm_demux:
2959 ret = dapm_connect_mux(dapm, path, control, wsource);
2960 if (ret)
2961 goto err;
2962 break;
2963 default:
2964 break;
2965 }
2966
2967 switch (wsink->id) {
2968 case snd_soc_dapm_mux:
2969 ret = dapm_connect_mux(dapm, path, control, wsink);
2970 if (ret != 0)
2971 goto err;
2972 break;
2973 case snd_soc_dapm_switch:
2974 case snd_soc_dapm_mixer:
2975 case snd_soc_dapm_mixer_named_ctl:
2976 ret = dapm_connect_mixer(dapm, path, control);
2977 if (ret != 0)
2978 goto err;
2979 break;
2980 default:
2981 break;
2982 }
2983 }
2984
2985 list_add(&path->list, &dapm->card->paths);
2986
2987 snd_soc_dapm_for_each_direction(dir)
2988 list_add(&path->list_node[dir], &path->node[dir]->edges[dir]);
2989
2990 snd_soc_dapm_for_each_direction(dir) {
2991 dapm_update_widget_flags(path->node[dir]);
2992 dapm_mark_dirty(path->node[dir], "Route added");
2993 }
2994
2995 if (snd_soc_card_is_instantiated(dapm->card) && path->connect)
2996 dapm_path_invalidate(path);
2997
2998 return 0;
2999 err:
3000 kfree(path);
3001 return ret;
3002 }
3003
snd_soc_dapm_add_route(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route)3004 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
3005 const struct snd_soc_dapm_route *route)
3006 {
3007 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
3008 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
3009 const char *sink;
3010 const char *source;
3011 char prefixed_sink[80];
3012 char prefixed_source[80];
3013 const char *prefix;
3014 unsigned int sink_ref = 0;
3015 unsigned int source_ref = 0;
3016 int ret;
3017
3018 prefix = soc_dapm_prefix(dapm);
3019 if (prefix) {
3020 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
3021 prefix, route->sink);
3022 sink = prefixed_sink;
3023 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
3024 prefix, route->source);
3025 source = prefixed_source;
3026 } else {
3027 sink = route->sink;
3028 source = route->source;
3029 }
3030
3031 wsource = dapm_wcache_lookup(dapm->wcache_source, source);
3032 wsink = dapm_wcache_lookup(dapm->wcache_sink, sink);
3033
3034 if (wsink && wsource)
3035 goto skip_search;
3036
3037 /*
3038 * find src and dest widgets over all widgets but favor a widget from
3039 * current DAPM context
3040 */
3041 for_each_card_widgets(dapm->card, w) {
3042 if (!wsink && !(strcmp(w->name, sink))) {
3043 wtsink = w;
3044 if (w->dapm == dapm) {
3045 wsink = w;
3046 if (wsource)
3047 break;
3048 }
3049 sink_ref++;
3050 if (sink_ref > 1)
3051 dev_warn(dapm->dev,
3052 "ASoC: sink widget %s overwritten\n",
3053 w->name);
3054 continue;
3055 }
3056 if (!wsource && !(strcmp(w->name, source))) {
3057 wtsource = w;
3058 if (w->dapm == dapm) {
3059 wsource = w;
3060 if (wsink)
3061 break;
3062 }
3063 source_ref++;
3064 if (source_ref > 1)
3065 dev_warn(dapm->dev,
3066 "ASoC: source widget %s overwritten\n",
3067 w->name);
3068 }
3069 }
3070 /* use widget from another DAPM context if not found from this */
3071 if (!wsink)
3072 wsink = wtsink;
3073 if (!wsource)
3074 wsource = wtsource;
3075
3076 ret = -ENODEV;
3077 if (!wsource)
3078 goto err;
3079 if (!wsink)
3080 goto err;
3081
3082 skip_search:
3083 /* update cache */
3084 dapm->wcache_sink = wsink;
3085 dapm->wcache_source = wsource;
3086
3087 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
3088 route->connected);
3089 err:
3090 if (ret)
3091 dev_err(dapm->dev, "ASoC: Failed to add route %s%s -%s%s%s> %s%s\n",
3092 source, !wsource ? "(*)" : "",
3093 !route->control ? "" : "> [",
3094 !route->control ? "" : route->control,
3095 !route->control ? "" : "] -",
3096 sink, !wsink ? "(*)" : "");
3097 return ret;
3098 }
3099
snd_soc_dapm_del_route(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route)3100 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
3101 const struct snd_soc_dapm_route *route)
3102 {
3103 struct snd_soc_dapm_path *path, *p;
3104 const char *sink;
3105 const char *source;
3106 char prefixed_sink[80];
3107 char prefixed_source[80];
3108 const char *prefix;
3109
3110 if (route->control) {
3111 dev_err(dapm->dev,
3112 "ASoC: Removal of routes with controls not supported\n");
3113 return -EINVAL;
3114 }
3115
3116 prefix = soc_dapm_prefix(dapm);
3117 if (prefix) {
3118 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
3119 prefix, route->sink);
3120 sink = prefixed_sink;
3121 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
3122 prefix, route->source);
3123 source = prefixed_source;
3124 } else {
3125 sink = route->sink;
3126 source = route->source;
3127 }
3128
3129 path = NULL;
3130 list_for_each_entry(p, &dapm->card->paths, list) {
3131 if (strcmp(p->source->name, source) != 0)
3132 continue;
3133 if (strcmp(p->sink->name, sink) != 0)
3134 continue;
3135 path = p;
3136 break;
3137 }
3138
3139 if (path) {
3140 struct snd_soc_dapm_widget *wsource = path->source;
3141 struct snd_soc_dapm_widget *wsink = path->sink;
3142
3143 dapm_mark_dirty(wsource, "Route removed");
3144 dapm_mark_dirty(wsink, "Route removed");
3145 if (path->connect)
3146 dapm_path_invalidate(path);
3147
3148 dapm_free_path(path);
3149
3150 /* Update any path related flags */
3151 dapm_update_widget_flags(wsource);
3152 dapm_update_widget_flags(wsink);
3153 } else {
3154 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
3155 source, sink);
3156 }
3157
3158 return 0;
3159 }
3160
3161 /**
3162 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
3163 * @dapm: DAPM context
3164 * @route: audio routes
3165 * @num: number of routes
3166 *
3167 * Connects 2 dapm widgets together via a named audio path. The sink is
3168 * the widget receiving the audio signal, whilst the source is the sender
3169 * of the audio signal.
3170 *
3171 * Returns 0 for success else error. On error all resources can be freed
3172 * with a call to snd_soc_card_free().
3173 */
snd_soc_dapm_add_routes(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route,int num)3174 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
3175 const struct snd_soc_dapm_route *route, int num)
3176 {
3177 int i, ret = 0;
3178
3179 snd_soc_dapm_mutex_lock(dapm);
3180 for (i = 0; i < num; i++) {
3181 int r = snd_soc_dapm_add_route(dapm, route);
3182 if (r < 0)
3183 ret = r;
3184 route++;
3185 }
3186 snd_soc_dapm_mutex_unlock(dapm);
3187
3188 return ret;
3189 }
3190 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
3191
3192 /**
3193 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
3194 * @dapm: DAPM context
3195 * @route: audio routes
3196 * @num: number of routes
3197 *
3198 * Removes routes from the DAPM context.
3199 */
snd_soc_dapm_del_routes(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route,int num)3200 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
3201 const struct snd_soc_dapm_route *route, int num)
3202 {
3203 int i;
3204
3205 snd_soc_dapm_mutex_lock(dapm);
3206 for (i = 0; i < num; i++) {
3207 snd_soc_dapm_del_route(dapm, route);
3208 route++;
3209 }
3210 snd_soc_dapm_mutex_unlock(dapm);
3211
3212 return 0;
3213 }
3214 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
3215
snd_soc_dapm_weak_route(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route)3216 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
3217 const struct snd_soc_dapm_route *route)
3218 {
3219 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
3220 route->source,
3221 true);
3222 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
3223 route->sink,
3224 true);
3225 struct snd_soc_dapm_path *path;
3226 int count = 0;
3227
3228 if (!source) {
3229 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
3230 route->source);
3231 return -ENODEV;
3232 }
3233
3234 if (!sink) {
3235 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
3236 route->sink);
3237 return -ENODEV;
3238 }
3239
3240 if (route->control || route->connected)
3241 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
3242 route->source, route->sink);
3243
3244 snd_soc_dapm_widget_for_each_sink_path(source, path) {
3245 if (path->sink == sink) {
3246 path->weak = 1;
3247 count++;
3248 }
3249 }
3250
3251 if (count == 0)
3252 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
3253 route->source, route->sink);
3254 if (count > 1)
3255 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
3256 count, route->source, route->sink);
3257
3258 return 0;
3259 }
3260
3261 /**
3262 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
3263 * @dapm: DAPM context
3264 * @route: audio routes
3265 * @num: number of routes
3266 *
3267 * Mark existing routes matching those specified in the passed array
3268 * as being weak, meaning that they are ignored for the purpose of
3269 * power decisions. The main intended use case is for sidetone paths
3270 * which couple audio between other independent paths if they are both
3271 * active in order to make the combination work better at the user
3272 * level but which aren't intended to be "used".
3273 *
3274 * Note that CODEC drivers should not use this as sidetone type paths
3275 * can frequently also be used as bypass paths.
3276 */
snd_soc_dapm_weak_routes(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_route * route,int num)3277 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
3278 const struct snd_soc_dapm_route *route, int num)
3279 {
3280 int i;
3281 int ret = 0;
3282
3283 snd_soc_dapm_mutex_lock_root(dapm);
3284 for (i = 0; i < num; i++) {
3285 int err = snd_soc_dapm_weak_route(dapm, route);
3286 if (err)
3287 ret = err;
3288 route++;
3289 }
3290 snd_soc_dapm_mutex_unlock(dapm);
3291
3292 return ret;
3293 }
3294 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
3295
3296 /**
3297 * snd_soc_dapm_new_widgets - add new dapm widgets
3298 * @card: card to be checked for new dapm widgets
3299 *
3300 * Checks the codec for any new dapm widgets and creates them if found.
3301 *
3302 * Returns 0 for success.
3303 */
snd_soc_dapm_new_widgets(struct snd_soc_card * card)3304 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
3305 {
3306 struct snd_soc_dapm_widget *w;
3307 unsigned int val;
3308
3309 snd_soc_dapm_mutex_lock_root(card);
3310
3311 for_each_card_widgets(card, w)
3312 {
3313 if (w->new)
3314 continue;
3315
3316 if (w->num_kcontrols) {
3317 w->kcontrols = kcalloc(w->num_kcontrols,
3318 sizeof(struct snd_kcontrol *),
3319 GFP_KERNEL);
3320 if (!w->kcontrols) {
3321 snd_soc_dapm_mutex_unlock(card);
3322 return -ENOMEM;
3323 }
3324 }
3325
3326 switch(w->id) {
3327 case snd_soc_dapm_switch:
3328 case snd_soc_dapm_mixer:
3329 case snd_soc_dapm_mixer_named_ctl:
3330 dapm_new_mixer(w);
3331 break;
3332 case snd_soc_dapm_mux:
3333 case snd_soc_dapm_demux:
3334 dapm_new_mux(w);
3335 break;
3336 case snd_soc_dapm_pga:
3337 case snd_soc_dapm_effect:
3338 case snd_soc_dapm_out_drv:
3339 dapm_new_pga(w);
3340 break;
3341 case snd_soc_dapm_dai_link:
3342 dapm_new_dai_link(w);
3343 break;
3344 default:
3345 break;
3346 }
3347
3348 /* Read the initial power state from the device */
3349 if (w->reg >= 0) {
3350 val = soc_dapm_read(w->dapm, w->reg);
3351 val = val >> w->shift;
3352 val &= w->mask;
3353 if (val == w->on_val)
3354 w->power = 1;
3355 }
3356
3357 w->new = 1;
3358
3359 dapm_mark_dirty(w, "new widget");
3360 dapm_debugfs_add_widget(w);
3361 }
3362
3363 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
3364 snd_soc_dapm_mutex_unlock(card);
3365 return 0;
3366 }
3367 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
3368
3369 /**
3370 * snd_soc_dapm_get_volsw - dapm mixer get callback
3371 * @kcontrol: mixer control
3372 * @ucontrol: control element information
3373 *
3374 * Callback to get the value of a dapm mixer control.
3375 *
3376 * Returns 0 for success.
3377 */
snd_soc_dapm_get_volsw(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3378 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3379 struct snd_ctl_elem_value *ucontrol)
3380 {
3381 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3382 struct soc_mixer_control *mc =
3383 (struct soc_mixer_control *)kcontrol->private_value;
3384 int reg = mc->reg;
3385 unsigned int shift = mc->shift;
3386 int max = mc->max;
3387 unsigned int width = fls(max);
3388 unsigned int mask = (1 << fls(max)) - 1;
3389 unsigned int invert = mc->invert;
3390 unsigned int reg_val, val, rval = 0;
3391
3392 snd_soc_dapm_mutex_lock(dapm);
3393 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3394 reg_val = soc_dapm_read(dapm, reg);
3395 val = (reg_val >> shift) & mask;
3396
3397 if (reg != mc->rreg)
3398 reg_val = soc_dapm_read(dapm, mc->rreg);
3399
3400 if (snd_soc_volsw_is_stereo(mc))
3401 rval = (reg_val >> mc->rshift) & mask;
3402 } else {
3403 reg_val = dapm_kcontrol_get_value(kcontrol);
3404 val = reg_val & mask;
3405
3406 if (snd_soc_volsw_is_stereo(mc))
3407 rval = (reg_val >> width) & mask;
3408 }
3409 snd_soc_dapm_mutex_unlock(dapm);
3410
3411 if (invert)
3412 ucontrol->value.integer.value[0] = max - val;
3413 else
3414 ucontrol->value.integer.value[0] = val;
3415
3416 if (snd_soc_volsw_is_stereo(mc)) {
3417 if (invert)
3418 ucontrol->value.integer.value[1] = max - rval;
3419 else
3420 ucontrol->value.integer.value[1] = rval;
3421 }
3422
3423 return 0;
3424 }
3425 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3426
3427 /**
3428 * snd_soc_dapm_put_volsw - dapm mixer set callback
3429 * @kcontrol: mixer control
3430 * @ucontrol: control element information
3431 *
3432 * Callback to set the value of a dapm mixer control.
3433 *
3434 * Returns 0 for success.
3435 */
snd_soc_dapm_put_volsw(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3436 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3437 struct snd_ctl_elem_value *ucontrol)
3438 {
3439 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3440 struct snd_soc_card *card = dapm->card;
3441 struct soc_mixer_control *mc =
3442 (struct soc_mixer_control *)kcontrol->private_value;
3443 int reg = mc->reg;
3444 unsigned int shift = mc->shift;
3445 int max = mc->max;
3446 unsigned int width = fls(max);
3447 unsigned int mask = (1 << width) - 1;
3448 unsigned int invert = mc->invert;
3449 unsigned int val, rval = 0;
3450 int connect, rconnect = -1, change, reg_change = 0;
3451 struct snd_soc_dapm_update update = {};
3452 int ret = 0;
3453
3454 val = (ucontrol->value.integer.value[0] & mask);
3455 connect = !!val;
3456
3457 if (invert)
3458 val = max - val;
3459
3460 if (snd_soc_volsw_is_stereo(mc)) {
3461 rval = (ucontrol->value.integer.value[1] & mask);
3462 rconnect = !!rval;
3463 if (invert)
3464 rval = max - rval;
3465 }
3466
3467 snd_soc_dapm_mutex_lock(card);
3468
3469 /* This assumes field width < (bits in unsigned int / 2) */
3470 if (width > sizeof(unsigned int) * 8 / 2)
3471 dev_warn(dapm->dev,
3472 "ASoC: control %s field width limit exceeded\n",
3473 kcontrol->id.name);
3474 change = dapm_kcontrol_set_value(kcontrol, val | (rval << width));
3475
3476 if (reg != SND_SOC_NOPM) {
3477 val = val << shift;
3478 rval = rval << mc->rshift;
3479
3480 reg_change = soc_dapm_test_bits(dapm, reg, mask << shift, val);
3481
3482 if (snd_soc_volsw_is_stereo(mc))
3483 reg_change |= soc_dapm_test_bits(dapm, mc->rreg,
3484 mask << mc->rshift,
3485 rval);
3486 }
3487
3488 if (change || reg_change) {
3489 if (reg_change) {
3490 if (snd_soc_volsw_is_stereo(mc)) {
3491 update.has_second_set = true;
3492 update.reg2 = mc->rreg;
3493 update.mask2 = mask << mc->rshift;
3494 update.val2 = rval;
3495 }
3496 update.kcontrol = kcontrol;
3497 update.reg = reg;
3498 update.mask = mask << shift;
3499 update.val = val;
3500 card->update = &update;
3501 }
3502
3503 ret = soc_dapm_mixer_update_power(card, kcontrol, connect,
3504 rconnect);
3505
3506 card->update = NULL;
3507 }
3508
3509 snd_soc_dapm_mutex_unlock(card);
3510
3511 if (ret > 0)
3512 snd_soc_dpcm_runtime_update(card);
3513
3514 return change;
3515 }
3516 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3517
3518 /**
3519 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3520 * @kcontrol: mixer control
3521 * @ucontrol: control element information
3522 *
3523 * Callback to get the value of a dapm enumerated double mixer control.
3524 *
3525 * Returns 0 for success.
3526 */
snd_soc_dapm_get_enum_double(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3527 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3528 struct snd_ctl_elem_value *ucontrol)
3529 {
3530 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3531 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3532 unsigned int reg_val, val;
3533
3534 snd_soc_dapm_mutex_lock(dapm);
3535 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3536 reg_val = soc_dapm_read(dapm, e->reg);
3537 } else {
3538 reg_val = dapm_kcontrol_get_value(kcontrol);
3539 }
3540 snd_soc_dapm_mutex_unlock(dapm);
3541
3542 val = (reg_val >> e->shift_l) & e->mask;
3543 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3544 if (e->shift_l != e->shift_r) {
3545 val = (reg_val >> e->shift_r) & e->mask;
3546 val = snd_soc_enum_val_to_item(e, val);
3547 ucontrol->value.enumerated.item[1] = val;
3548 }
3549
3550 return 0;
3551 }
3552 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3553
3554 /**
3555 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3556 * @kcontrol: mixer control
3557 * @ucontrol: control element information
3558 *
3559 * Callback to set the value of a dapm enumerated double mixer control.
3560 *
3561 * Returns 0 for success.
3562 */
snd_soc_dapm_put_enum_double(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3563 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3564 struct snd_ctl_elem_value *ucontrol)
3565 {
3566 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3567 struct snd_soc_card *card = dapm->card;
3568 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3569 unsigned int *item = ucontrol->value.enumerated.item;
3570 unsigned int val, change, reg_change = 0;
3571 unsigned int mask;
3572 struct snd_soc_dapm_update update = {};
3573 int ret = 0;
3574
3575 if (item[0] >= e->items)
3576 return -EINVAL;
3577
3578 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3579 mask = e->mask << e->shift_l;
3580 if (e->shift_l != e->shift_r) {
3581 if (item[1] > e->items)
3582 return -EINVAL;
3583 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3584 mask |= e->mask << e->shift_r;
3585 }
3586
3587 snd_soc_dapm_mutex_lock(card);
3588
3589 change = dapm_kcontrol_set_value(kcontrol, val);
3590
3591 if (e->reg != SND_SOC_NOPM)
3592 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3593
3594 if (change || reg_change) {
3595 if (reg_change) {
3596 update.kcontrol = kcontrol;
3597 update.reg = e->reg;
3598 update.mask = mask;
3599 update.val = val;
3600 card->update = &update;
3601 }
3602
3603 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3604
3605 card->update = NULL;
3606 }
3607
3608 snd_soc_dapm_mutex_unlock(card);
3609
3610 if (ret > 0)
3611 snd_soc_dpcm_runtime_update(card);
3612
3613 return change;
3614 }
3615 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3616
3617 /**
3618 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3619 *
3620 * @kcontrol: mixer control
3621 * @uinfo: control element information
3622 *
3623 * Callback to provide information about a pin switch control.
3624 */
snd_soc_dapm_info_pin_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)3625 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3626 struct snd_ctl_elem_info *uinfo)
3627 {
3628 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3629 uinfo->count = 1;
3630 uinfo->value.integer.min = 0;
3631 uinfo->value.integer.max = 1;
3632
3633 return 0;
3634 }
3635 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3636
3637 /**
3638 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3639 *
3640 * @kcontrol: mixer control
3641 * @ucontrol: Value
3642 */
snd_soc_dapm_get_pin_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3643 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3644 struct snd_ctl_elem_value *ucontrol)
3645 {
3646 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3647 const char *pin = (const char *)kcontrol->private_value;
3648
3649 snd_soc_dapm_mutex_lock(card);
3650
3651 ucontrol->value.integer.value[0] =
3652 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3653
3654 snd_soc_dapm_mutex_unlock(card);
3655
3656 return 0;
3657 }
3658 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3659
3660 /**
3661 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3662 *
3663 * @kcontrol: mixer control
3664 * @ucontrol: Value
3665 */
snd_soc_dapm_put_pin_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3666 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3667 struct snd_ctl_elem_value *ucontrol)
3668 {
3669 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3670 const char *pin = (const char *)kcontrol->private_value;
3671 int ret;
3672
3673 snd_soc_dapm_mutex_lock(card);
3674 ret = __snd_soc_dapm_set_pin(&card->dapm, pin,
3675 !!ucontrol->value.integer.value[0]);
3676 snd_soc_dapm_mutex_unlock(card);
3677
3678 snd_soc_dapm_sync(&card->dapm);
3679 return ret;
3680 }
3681 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3682
3683 struct snd_soc_dapm_widget *
snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_widget * widget)3684 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3685 const struct snd_soc_dapm_widget *widget)
3686 {
3687 enum snd_soc_dapm_direction dir;
3688 struct snd_soc_dapm_widget *w;
3689 int ret = -ENOMEM;
3690
3691 w = dapm_cnew_widget(widget, soc_dapm_prefix(dapm));
3692 if (!w)
3693 goto cnew_failed;
3694
3695 switch (w->id) {
3696 case snd_soc_dapm_regulator_supply:
3697 w->regulator = devm_regulator_get(dapm->dev, widget->name);
3698 if (IS_ERR(w->regulator)) {
3699 ret = PTR_ERR(w->regulator);
3700 goto request_failed;
3701 }
3702
3703 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3704 ret = regulator_allow_bypass(w->regulator, true);
3705 if (ret != 0)
3706 dev_warn(dapm->dev,
3707 "ASoC: Failed to bypass %s: %d\n",
3708 w->name, ret);
3709 }
3710 break;
3711 case snd_soc_dapm_pinctrl:
3712 w->pinctrl = devm_pinctrl_get(dapm->dev);
3713 if (IS_ERR(w->pinctrl)) {
3714 ret = PTR_ERR(w->pinctrl);
3715 goto request_failed;
3716 }
3717
3718 /* set to sleep_state when initializing */
3719 dapm_pinctrl_event(w, NULL, SND_SOC_DAPM_POST_PMD);
3720 break;
3721 case snd_soc_dapm_clock_supply:
3722 w->clk = devm_clk_get(dapm->dev, widget->name);
3723 if (IS_ERR(w->clk)) {
3724 ret = PTR_ERR(w->clk);
3725 goto request_failed;
3726 }
3727 break;
3728 default:
3729 break;
3730 }
3731
3732 switch (w->id) {
3733 case snd_soc_dapm_mic:
3734 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3735 w->power_check = dapm_generic_check_power;
3736 break;
3737 case snd_soc_dapm_input:
3738 if (!dapm->card->fully_routed)
3739 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3740 w->power_check = dapm_generic_check_power;
3741 break;
3742 case snd_soc_dapm_spk:
3743 case snd_soc_dapm_hp:
3744 w->is_ep = SND_SOC_DAPM_EP_SINK;
3745 w->power_check = dapm_generic_check_power;
3746 break;
3747 case snd_soc_dapm_output:
3748 if (!dapm->card->fully_routed)
3749 w->is_ep = SND_SOC_DAPM_EP_SINK;
3750 w->power_check = dapm_generic_check_power;
3751 break;
3752 case snd_soc_dapm_vmid:
3753 case snd_soc_dapm_siggen:
3754 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3755 w->power_check = dapm_always_on_check_power;
3756 break;
3757 case snd_soc_dapm_sink:
3758 w->is_ep = SND_SOC_DAPM_EP_SINK;
3759 w->power_check = dapm_always_on_check_power;
3760 break;
3761
3762 case snd_soc_dapm_mux:
3763 case snd_soc_dapm_demux:
3764 case snd_soc_dapm_switch:
3765 case snd_soc_dapm_mixer:
3766 case snd_soc_dapm_mixer_named_ctl:
3767 case snd_soc_dapm_adc:
3768 case snd_soc_dapm_aif_out:
3769 case snd_soc_dapm_dac:
3770 case snd_soc_dapm_aif_in:
3771 case snd_soc_dapm_pga:
3772 case snd_soc_dapm_buffer:
3773 case snd_soc_dapm_scheduler:
3774 case snd_soc_dapm_effect:
3775 case snd_soc_dapm_src:
3776 case snd_soc_dapm_asrc:
3777 case snd_soc_dapm_encoder:
3778 case snd_soc_dapm_decoder:
3779 case snd_soc_dapm_out_drv:
3780 case snd_soc_dapm_micbias:
3781 case snd_soc_dapm_line:
3782 case snd_soc_dapm_dai_link:
3783 case snd_soc_dapm_dai_out:
3784 case snd_soc_dapm_dai_in:
3785 w->power_check = dapm_generic_check_power;
3786 break;
3787 case snd_soc_dapm_supply:
3788 case snd_soc_dapm_regulator_supply:
3789 case snd_soc_dapm_pinctrl:
3790 case snd_soc_dapm_clock_supply:
3791 case snd_soc_dapm_kcontrol:
3792 w->is_supply = 1;
3793 w->power_check = dapm_supply_check_power;
3794 break;
3795 default:
3796 w->power_check = dapm_always_on_check_power;
3797 break;
3798 }
3799
3800 w->dapm = dapm;
3801 INIT_LIST_HEAD(&w->list);
3802 INIT_LIST_HEAD(&w->dirty);
3803 /* see for_each_card_widgets */
3804 list_add_tail(&w->list, &dapm->card->widgets);
3805
3806 snd_soc_dapm_for_each_direction(dir) {
3807 INIT_LIST_HEAD(&w->edges[dir]);
3808 w->endpoints[dir] = -1;
3809 }
3810
3811 /* machine layer sets up unconnected pins and insertions */
3812 w->connected = 1;
3813 return w;
3814
3815 request_failed:
3816 dev_err_probe(dapm->dev, ret, "ASoC: Failed to request %s\n",
3817 w->name);
3818 kfree_const(w->name);
3819 kfree_const(w->sname);
3820 kfree(w);
3821 cnew_failed:
3822 return ERR_PTR(ret);
3823 }
3824
3825 /**
3826 * snd_soc_dapm_new_control - create new dapm control
3827 * @dapm: DAPM context
3828 * @widget: widget template
3829 *
3830 * Creates new DAPM control based upon a template.
3831 *
3832 * Returns a widget pointer on success or an error pointer on failure
3833 */
3834 struct snd_soc_dapm_widget *
snd_soc_dapm_new_control(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_widget * widget)3835 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3836 const struct snd_soc_dapm_widget *widget)
3837 {
3838 struct snd_soc_dapm_widget *w;
3839
3840 snd_soc_dapm_mutex_lock(dapm);
3841 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3842 snd_soc_dapm_mutex_unlock(dapm);
3843
3844 return w;
3845 }
3846 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
3847
3848 /**
3849 * snd_soc_dapm_new_controls - create new dapm controls
3850 * @dapm: DAPM context
3851 * @widget: widget array
3852 * @num: number of widgets
3853 *
3854 * Creates new DAPM controls based upon the templates.
3855 *
3856 * Returns 0 for success else error.
3857 */
snd_soc_dapm_new_controls(struct snd_soc_dapm_context * dapm,const struct snd_soc_dapm_widget * widget,int num)3858 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3859 const struct snd_soc_dapm_widget *widget,
3860 int num)
3861 {
3862 int i;
3863 int ret = 0;
3864
3865 snd_soc_dapm_mutex_lock_root(dapm);
3866 for (i = 0; i < num; i++) {
3867 struct snd_soc_dapm_widget *w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3868 if (IS_ERR(w)) {
3869 ret = PTR_ERR(w);
3870 break;
3871 }
3872 widget++;
3873 }
3874 snd_soc_dapm_mutex_unlock(dapm);
3875 return ret;
3876 }
3877 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3878
3879 static int
snd_soc_dai_link_event_pre_pmu(struct snd_soc_dapm_widget * w,struct snd_pcm_substream * substream)3880 snd_soc_dai_link_event_pre_pmu(struct snd_soc_dapm_widget *w,
3881 struct snd_pcm_substream *substream)
3882 {
3883 struct snd_soc_dapm_path *path;
3884 struct snd_soc_dai *source, *sink;
3885 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
3886 struct snd_pcm_hw_params *params = NULL;
3887 const struct snd_soc_pcm_stream *config = NULL;
3888 struct snd_pcm_runtime *runtime = NULL;
3889 unsigned int fmt;
3890 int ret = 0;
3891
3892 /*
3893 * NOTE
3894 *
3895 * snd_pcm_hw_params is quite large (608 bytes on arm64) and is
3896 * starting to get a bit excessive for allocation on the stack,
3897 * especially when you're building with some of the KASAN type
3898 * stuff that increases stack usage.
3899 * So, we use kzalloc()/kfree() for params in this function.
3900 */
3901 params = kzalloc(sizeof(*params), GFP_KERNEL);
3902 if (!params)
3903 return -ENOMEM;
3904
3905 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
3906 if (!runtime) {
3907 ret = -ENOMEM;
3908 goto out;
3909 }
3910
3911 substream->runtime = runtime;
3912
3913 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3914 snd_soc_dapm_widget_for_each_source_path(w, path) {
3915 source = path->source->priv;
3916
3917 ret = snd_soc_dai_startup(source, substream);
3918 if (ret < 0)
3919 goto out;
3920
3921 snd_soc_dai_activate(source, substream->stream);
3922 }
3923
3924 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3925 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3926 sink = path->sink->priv;
3927
3928 ret = snd_soc_dai_startup(sink, substream);
3929 if (ret < 0)
3930 goto out;
3931
3932 snd_soc_dai_activate(sink, substream->stream);
3933 }
3934
3935 substream->hw_opened = 1;
3936
3937 /*
3938 * Note: getting the config after .startup() gives a chance to
3939 * either party on the link to alter the configuration if
3940 * necessary
3941 */
3942 config = rtd->dai_link->c2c_params + rtd->c2c_params_select;
3943 if (!config) {
3944 dev_err(w->dapm->dev, "ASoC: link config missing\n");
3945 ret = -EINVAL;
3946 goto out;
3947 }
3948
3949 /* Be a little careful as we don't want to overflow the mask array */
3950 if (!config->formats) {
3951 dev_warn(w->dapm->dev, "ASoC: Invalid format was specified\n");
3952
3953 ret = -EINVAL;
3954 goto out;
3955 }
3956
3957 fmt = ffs(config->formats) - 1;
3958
3959 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3960 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3961 config->rate_min;
3962 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3963 config->rate_max;
3964 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3965 = config->channels_min;
3966 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3967 = config->channels_max;
3968
3969 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3970 snd_soc_dapm_widget_for_each_source_path(w, path) {
3971 source = path->source->priv;
3972
3973 ret = snd_soc_dai_hw_params(source, substream, params);
3974 if (ret < 0)
3975 goto out;
3976
3977 dapm_update_dai_unlocked(substream, params, source);
3978 }
3979
3980 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3981 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3982 sink = path->sink->priv;
3983
3984 ret = snd_soc_dai_hw_params(sink, substream, params);
3985 if (ret < 0)
3986 goto out;
3987
3988 dapm_update_dai_unlocked(substream, params, sink);
3989 }
3990
3991 runtime->format = params_format(params);
3992 runtime->subformat = params_subformat(params);
3993 runtime->channels = params_channels(params);
3994 runtime->rate = params_rate(params);
3995
3996 out:
3997 /* see above NOTE */
3998 kfree(params);
3999
4000 return ret;
4001 }
4002
snd_soc_dai_link_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)4003 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
4004 struct snd_kcontrol *kcontrol, int event)
4005 {
4006 struct snd_soc_dapm_path *path;
4007 struct snd_soc_dai *source, *sink;
4008 struct snd_pcm_substream *substream = w->priv;
4009 int ret = 0, saved_stream = substream->stream;
4010
4011 if (WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
4012 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
4013 return -EINVAL;
4014
4015 switch (event) {
4016 case SND_SOC_DAPM_PRE_PMU:
4017 ret = snd_soc_dai_link_event_pre_pmu(w, substream);
4018 if (ret < 0)
4019 goto out;
4020
4021 break;
4022
4023 case SND_SOC_DAPM_POST_PMU:
4024 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4025 sink = path->sink->priv;
4026
4027 snd_soc_dai_digital_mute(sink, 0, SNDRV_PCM_STREAM_PLAYBACK);
4028 ret = 0;
4029 }
4030 break;
4031
4032 case SND_SOC_DAPM_PRE_PMD:
4033 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4034 sink = path->sink->priv;
4035
4036 snd_soc_dai_digital_mute(sink, 1, SNDRV_PCM_STREAM_PLAYBACK);
4037 ret = 0;
4038 }
4039
4040 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
4041 snd_soc_dapm_widget_for_each_source_path(w, path) {
4042 source = path->source->priv;
4043 snd_soc_dai_hw_free(source, substream, 0);
4044 }
4045
4046 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
4047 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4048 sink = path->sink->priv;
4049 snd_soc_dai_hw_free(sink, substream, 0);
4050 }
4051
4052 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
4053 snd_soc_dapm_widget_for_each_source_path(w, path) {
4054 source = path->source->priv;
4055 snd_soc_dai_deactivate(source, substream->stream);
4056 snd_soc_dai_shutdown(source, substream, 0);
4057 }
4058
4059 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
4060 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4061 sink = path->sink->priv;
4062 snd_soc_dai_deactivate(sink, substream->stream);
4063 snd_soc_dai_shutdown(sink, substream, 0);
4064 }
4065 break;
4066
4067 case SND_SOC_DAPM_POST_PMD:
4068 kfree(substream->runtime);
4069 break;
4070
4071 default:
4072 WARN(1, "Unknown event %d\n", event);
4073 ret = -EINVAL;
4074 }
4075
4076 out:
4077 /* Restore the substream direction */
4078 substream->stream = saved_stream;
4079 return ret;
4080 }
4081
snd_soc_dapm_dai_link_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)4082 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
4083 struct snd_ctl_elem_value *ucontrol)
4084 {
4085 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4086 struct snd_soc_pcm_runtime *rtd = w->priv;
4087
4088 ucontrol->value.enumerated.item[0] = rtd->c2c_params_select;
4089
4090 return 0;
4091 }
4092
snd_soc_dapm_dai_link_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)4093 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
4094 struct snd_ctl_elem_value *ucontrol)
4095 {
4096 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4097 struct snd_soc_pcm_runtime *rtd = w->priv;
4098
4099 /* Can't change the config when widget is already powered */
4100 if (w->power)
4101 return -EBUSY;
4102
4103 if (ucontrol->value.enumerated.item[0] == rtd->c2c_params_select)
4104 return 0;
4105
4106 if (ucontrol->value.enumerated.item[0] >= rtd->dai_link->num_c2c_params)
4107 return -EINVAL;
4108
4109 rtd->c2c_params_select = ucontrol->value.enumerated.item[0];
4110
4111 return 1;
4112 }
4113
4114 static void
snd_soc_dapm_free_kcontrol(struct snd_soc_card * card,unsigned long * private_value,int num_c2c_params,const char ** w_param_text)4115 snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
4116 unsigned long *private_value,
4117 int num_c2c_params,
4118 const char **w_param_text)
4119 {
4120 int count;
4121
4122 devm_kfree(card->dev, (void *)*private_value);
4123
4124 if (!w_param_text)
4125 return;
4126
4127 for (count = 0 ; count < num_c2c_params; count++)
4128 devm_kfree(card->dev, (void *)w_param_text[count]);
4129 devm_kfree(card->dev, w_param_text);
4130 }
4131
4132 static struct snd_kcontrol_new *
snd_soc_dapm_alloc_kcontrol(struct snd_soc_card * card,char * link_name,const struct snd_soc_pcm_stream * c2c_params,int num_c2c_params,const char ** w_param_text,unsigned long * private_value)4133 snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card,
4134 char *link_name,
4135 const struct snd_soc_pcm_stream *c2c_params,
4136 int num_c2c_params, const char **w_param_text,
4137 unsigned long *private_value)
4138 {
4139 struct soc_enum w_param_enum[] = {
4140 SOC_ENUM_SINGLE(0, 0, 0, NULL),
4141 };
4142 struct snd_kcontrol_new kcontrol_dai_link[] = {
4143 SOC_ENUM_EXT(NULL, w_param_enum[0],
4144 snd_soc_dapm_dai_link_get,
4145 snd_soc_dapm_dai_link_put),
4146 };
4147 struct snd_kcontrol_new *kcontrol_news;
4148 const struct snd_soc_pcm_stream *config = c2c_params;
4149 int count;
4150
4151 for (count = 0 ; count < num_c2c_params; count++) {
4152 if (!config->stream_name) {
4153 dev_warn(card->dapm.dev,
4154 "ASoC: anonymous config %d for dai link %s\n",
4155 count, link_name);
4156 w_param_text[count] =
4157 devm_kasprintf(card->dev, GFP_KERNEL,
4158 "Anonymous Configuration %d",
4159 count);
4160 } else {
4161 w_param_text[count] = devm_kmemdup(card->dev,
4162 config->stream_name,
4163 strlen(config->stream_name) + 1,
4164 GFP_KERNEL);
4165 }
4166 if (!w_param_text[count])
4167 goto outfree_w_param;
4168 config++;
4169 }
4170
4171 w_param_enum[0].items = num_c2c_params;
4172 w_param_enum[0].texts = w_param_text;
4173
4174 *private_value =
4175 (unsigned long) devm_kmemdup(card->dev,
4176 (void *)(kcontrol_dai_link[0].private_value),
4177 sizeof(struct soc_enum), GFP_KERNEL);
4178 if (!*private_value) {
4179 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4180 link_name);
4181 goto outfree_w_param;
4182 }
4183 kcontrol_dai_link[0].private_value = *private_value;
4184 /* duplicate kcontrol_dai_link on heap so that memory persists */
4185 kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0],
4186 sizeof(struct snd_kcontrol_new),
4187 GFP_KERNEL);
4188 if (!kcontrol_news) {
4189 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4190 link_name);
4191 goto outfree_w_param;
4192 }
4193 return kcontrol_news;
4194
4195 outfree_w_param:
4196 snd_soc_dapm_free_kcontrol(card, private_value, num_c2c_params, w_param_text);
4197 return NULL;
4198 }
4199
4200 static struct snd_soc_dapm_widget *
snd_soc_dapm_new_dai(struct snd_soc_card * card,struct snd_pcm_substream * substream,char * id)4201 snd_soc_dapm_new_dai(struct snd_soc_card *card,
4202 struct snd_pcm_substream *substream,
4203 char *id)
4204 {
4205 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
4206 struct snd_soc_dapm_widget template;
4207 struct snd_soc_dapm_widget *w;
4208 const struct snd_kcontrol_new *kcontrol_news;
4209 int num_kcontrols;
4210 const char **w_param_text;
4211 unsigned long private_value = 0;
4212 char *link_name;
4213 int ret = -ENOMEM;
4214
4215 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
4216 rtd->dai_link->name, id);
4217 if (!link_name)
4218 goto name_fail;
4219
4220 /* allocate memory for control, only in case of multiple configs */
4221 w_param_text = NULL;
4222 kcontrol_news = NULL;
4223 num_kcontrols = 0;
4224 if (rtd->dai_link->num_c2c_params > 1) {
4225 w_param_text = devm_kcalloc(card->dev,
4226 rtd->dai_link->num_c2c_params,
4227 sizeof(char *), GFP_KERNEL);
4228 if (!w_param_text)
4229 goto param_fail;
4230
4231 num_kcontrols = 1;
4232 kcontrol_news = snd_soc_dapm_alloc_kcontrol(card, link_name,
4233 rtd->dai_link->c2c_params,
4234 rtd->dai_link->num_c2c_params,
4235 w_param_text, &private_value);
4236 if (!kcontrol_news)
4237 goto param_fail;
4238 }
4239
4240 memset(&template, 0, sizeof(template));
4241 template.reg = SND_SOC_NOPM;
4242 template.id = snd_soc_dapm_dai_link;
4243 template.name = link_name;
4244 template.event = snd_soc_dai_link_event;
4245 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
4246 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
4247 template.kcontrol_news = kcontrol_news;
4248 template.num_kcontrols = num_kcontrols;
4249
4250 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
4251
4252 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
4253 if (IS_ERR(w)) {
4254 ret = PTR_ERR(w);
4255 goto outfree_kcontrol_news;
4256 }
4257
4258 w->priv = substream;
4259
4260 return w;
4261
4262 outfree_kcontrol_news:
4263 devm_kfree(card->dev, (void *)template.kcontrol_news);
4264 snd_soc_dapm_free_kcontrol(card, &private_value,
4265 rtd->dai_link->num_c2c_params, w_param_text);
4266 param_fail:
4267 devm_kfree(card->dev, link_name);
4268 name_fail:
4269 dev_err(rtd->dev, "ASoC: Failed to create %s-%s widget: %d\n",
4270 rtd->dai_link->name, id, ret);
4271 return ERR_PTR(ret);
4272 }
4273
4274 /**
4275 * snd_soc_dapm_new_dai_widgets - Create new DAPM widgets
4276 * @dapm: DAPM context
4277 * @dai: parent DAI
4278 *
4279 * Returns 0 on success, error code otherwise.
4280 */
snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context * dapm,struct snd_soc_dai * dai)4281 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
4282 struct snd_soc_dai *dai)
4283 {
4284 struct snd_soc_dapm_widget template;
4285 struct snd_soc_dapm_widget *w;
4286
4287 WARN_ON(dapm->dev != dai->dev);
4288
4289 memset(&template, 0, sizeof(template));
4290 template.reg = SND_SOC_NOPM;
4291
4292 if (dai->driver->playback.stream_name) {
4293 template.id = snd_soc_dapm_dai_in;
4294 template.name = dai->driver->playback.stream_name;
4295 template.sname = dai->driver->playback.stream_name;
4296
4297 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4298 template.name);
4299
4300 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4301 if (IS_ERR(w))
4302 return PTR_ERR(w);
4303
4304 w->priv = dai;
4305 snd_soc_dai_set_widget_playback(dai, w);
4306 }
4307
4308 if (dai->driver->capture.stream_name) {
4309 template.id = snd_soc_dapm_dai_out;
4310 template.name = dai->driver->capture.stream_name;
4311 template.sname = dai->driver->capture.stream_name;
4312
4313 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4314 template.name);
4315
4316 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4317 if (IS_ERR(w))
4318 return PTR_ERR(w);
4319
4320 w->priv = dai;
4321 snd_soc_dai_set_widget_capture(dai, w);
4322 }
4323
4324 return 0;
4325 }
4326 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_dai_widgets);
4327
snd_soc_dapm_link_dai_widgets(struct snd_soc_card * card)4328 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
4329 {
4330 struct snd_soc_dapm_widget *dai_w, *w;
4331 struct snd_soc_dapm_widget *src, *sink;
4332 struct snd_soc_dai *dai;
4333
4334 /* For each DAI widget... */
4335 for_each_card_widgets(card, dai_w) {
4336 switch (dai_w->id) {
4337 case snd_soc_dapm_dai_in:
4338 case snd_soc_dapm_dai_out:
4339 break;
4340 default:
4341 continue;
4342 }
4343
4344 /* let users know there is no DAI to link */
4345 if (!dai_w->priv) {
4346 dev_dbg(card->dev, "dai widget %s has no DAI\n",
4347 dai_w->name);
4348 continue;
4349 }
4350
4351 dai = dai_w->priv;
4352
4353 /* ...find all widgets with the same stream and link them */
4354 for_each_card_widgets(card, w) {
4355 if (w->dapm != dai_w->dapm)
4356 continue;
4357
4358 switch (w->id) {
4359 case snd_soc_dapm_dai_in:
4360 case snd_soc_dapm_dai_out:
4361 continue;
4362 default:
4363 break;
4364 }
4365
4366 if (!w->sname || !strstr(w->sname, dai_w->sname))
4367 continue;
4368
4369 if (dai_w->id == snd_soc_dapm_dai_in) {
4370 src = dai_w;
4371 sink = w;
4372 } else {
4373 src = w;
4374 sink = dai_w;
4375 }
4376 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
4377 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
4378 }
4379 }
4380
4381 return 0;
4382 }
4383
dapm_connect_dai_routes(struct snd_soc_dapm_context * dapm,struct snd_soc_dai * src_dai,struct snd_soc_dapm_widget * src,struct snd_soc_dapm_widget * dai,struct snd_soc_dai * sink_dai,struct snd_soc_dapm_widget * sink)4384 static void dapm_connect_dai_routes(struct snd_soc_dapm_context *dapm,
4385 struct snd_soc_dai *src_dai,
4386 struct snd_soc_dapm_widget *src,
4387 struct snd_soc_dapm_widget *dai,
4388 struct snd_soc_dai *sink_dai,
4389 struct snd_soc_dapm_widget *sink)
4390 {
4391 dev_dbg(dapm->dev, "connected DAI link %s:%s -> %s:%s\n",
4392 src_dai->component->name, src->name,
4393 sink_dai->component->name, sink->name);
4394
4395 if (dai) {
4396 snd_soc_dapm_add_path(dapm, src, dai, NULL, NULL);
4397 src = dai;
4398 }
4399
4400 snd_soc_dapm_add_path(dapm, src, sink, NULL, NULL);
4401 }
4402
dapm_connect_dai_pair(struct snd_soc_card * card,struct snd_soc_pcm_runtime * rtd,struct snd_soc_dai * codec_dai,struct snd_soc_dai * cpu_dai)4403 static void dapm_connect_dai_pair(struct snd_soc_card *card,
4404 struct snd_soc_pcm_runtime *rtd,
4405 struct snd_soc_dai *codec_dai,
4406 struct snd_soc_dai *cpu_dai)
4407 {
4408 struct snd_soc_dai_link *dai_link = rtd->dai_link;
4409 struct snd_soc_dapm_widget *codec, *cpu;
4410 struct snd_soc_dai *src_dai[] = { cpu_dai, codec_dai };
4411 struct snd_soc_dai *sink_dai[] = { codec_dai, cpu_dai };
4412 struct snd_soc_dapm_widget **src[] = { &cpu, &codec };
4413 struct snd_soc_dapm_widget **sink[] = { &codec, &cpu };
4414 char *widget_name[] = { "playback", "capture" };
4415 int stream;
4416
4417 for_each_pcm_streams(stream) {
4418 int stream_cpu, stream_codec;
4419
4420 stream_cpu = snd_soc_get_stream_cpu(dai_link, stream);
4421 stream_codec = stream;
4422
4423 /* connect BE DAI playback if widgets are valid */
4424 cpu = snd_soc_dai_get_widget(cpu_dai, stream_cpu);
4425 codec = snd_soc_dai_get_widget(codec_dai, stream_codec);
4426
4427 if (!cpu || !codec)
4428 continue;
4429
4430 /* special handling for [Codec2Codec] */
4431 if (dai_link->c2c_params && !rtd->c2c_widget[stream]) {
4432 struct snd_pcm_substream *substream = rtd->pcm->streams[stream].substream;
4433 struct snd_soc_dapm_widget *dai = snd_soc_dapm_new_dai(card, substream,
4434 widget_name[stream]);
4435
4436 if (IS_ERR(dai))
4437 continue;
4438
4439 rtd->c2c_widget[stream] = dai;
4440 }
4441
4442 dapm_connect_dai_routes(&card->dapm, src_dai[stream], *src[stream],
4443 rtd->c2c_widget[stream],
4444 sink_dai[stream], *sink[stream]);
4445 }
4446 }
4447
soc_dapm_dai_stream_event(struct snd_soc_dai * dai,int stream,int event)4448 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
4449 int event)
4450 {
4451 struct snd_soc_dapm_widget *w;
4452
4453 w = snd_soc_dai_get_widget(dai, stream);
4454
4455 if (w) {
4456 unsigned int ep;
4457
4458 dapm_mark_dirty(w, "stream event");
4459
4460 if (w->id == snd_soc_dapm_dai_in) {
4461 ep = SND_SOC_DAPM_EP_SOURCE;
4462 dapm_widget_invalidate_input_paths(w);
4463 } else {
4464 ep = SND_SOC_DAPM_EP_SINK;
4465 dapm_widget_invalidate_output_paths(w);
4466 }
4467
4468 switch (event) {
4469 case SND_SOC_DAPM_STREAM_START:
4470 w->active = 1;
4471 w->is_ep = ep;
4472 break;
4473 case SND_SOC_DAPM_STREAM_STOP:
4474 w->active = 0;
4475 w->is_ep = 0;
4476 break;
4477 case SND_SOC_DAPM_STREAM_SUSPEND:
4478 case SND_SOC_DAPM_STREAM_RESUME:
4479 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
4480 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
4481 break;
4482 }
4483 }
4484 }
4485
snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card * card)4486 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
4487 {
4488 struct snd_soc_pcm_runtime *rtd;
4489 struct snd_soc_dai *cpu_dai;
4490 struct snd_soc_dai *codec_dai;
4491
4492 /* for each BE DAI link... */
4493 for_each_card_rtds(card, rtd) {
4494 struct snd_soc_dai_link_ch_map *ch_maps;
4495 int i;
4496
4497 /*
4498 * dynamic FE links have no fixed DAI mapping.
4499 * CODEC<->CODEC links have no direct connection.
4500 */
4501 if (rtd->dai_link->dynamic)
4502 continue;
4503
4504 /*
4505 * see
4506 * soc.h :: [dai_link->ch_maps Image sample]
4507 */
4508 for_each_rtd_ch_maps(rtd, i, ch_maps) {
4509 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu);
4510 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
4511
4512 dapm_connect_dai_pair(card, rtd, codec_dai, cpu_dai);
4513 }
4514 }
4515 }
4516
soc_dapm_stream_event(struct snd_soc_pcm_runtime * rtd,int stream,int event)4517 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4518 int event)
4519 {
4520 struct snd_soc_dai *dai;
4521 int i;
4522
4523 for_each_rtd_dais(rtd, i, dai)
4524 soc_dapm_dai_stream_event(dai, stream, event);
4525
4526 dapm_power_widgets(rtd->card, event);
4527 }
4528
4529 /**
4530 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4531 * @rtd: PCM runtime data
4532 * @stream: stream name
4533 * @event: stream event
4534 *
4535 * Sends a stream event to the dapm core. The core then makes any
4536 * necessary widget power changes.
4537 *
4538 * Returns 0 for success else error.
4539 */
snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime * rtd,int stream,int event)4540 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4541 int event)
4542 {
4543 struct snd_soc_card *card = rtd->card;
4544
4545 snd_soc_dapm_mutex_lock(card);
4546 soc_dapm_stream_event(rtd, stream, event);
4547 snd_soc_dapm_mutex_unlock(card);
4548 }
4549
snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime * rtd,int stream)4550 void snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime *rtd, int stream)
4551 {
4552 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
4553 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
4554 /* powered down playback stream now */
4555 snd_soc_dapm_stream_event(rtd,
4556 SNDRV_PCM_STREAM_PLAYBACK,
4557 SND_SOC_DAPM_STREAM_STOP);
4558 } else {
4559 /* start delayed pop wq here for playback streams */
4560 rtd->pop_wait = 1;
4561 queue_delayed_work(system_power_efficient_wq,
4562 &rtd->delayed_work,
4563 msecs_to_jiffies(rtd->pmdown_time));
4564 }
4565 } else {
4566 /* capture streams can be powered down now */
4567 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
4568 SND_SOC_DAPM_STREAM_STOP);
4569 }
4570 }
4571 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_stop);
4572
4573 /**
4574 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4575 * @dapm: DAPM context
4576 * @pin: pin name
4577 *
4578 * Enables input/output pin and its parents or children widgets iff there is
4579 * a valid audio route and active audio stream.
4580 *
4581 * Requires external locking.
4582 *
4583 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4584 * do any widget power switching.
4585 */
snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4586 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4587 const char *pin)
4588 {
4589 return snd_soc_dapm_set_pin(dapm, pin, 1);
4590 }
4591 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4592
4593 /**
4594 * snd_soc_dapm_enable_pin - enable pin.
4595 * @dapm: DAPM context
4596 * @pin: pin name
4597 *
4598 * Enables input/output pin and its parents or children widgets iff there is
4599 * a valid audio route and active audio stream.
4600 *
4601 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4602 * do any widget power switching.
4603 */
snd_soc_dapm_enable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4604 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4605 {
4606 int ret;
4607
4608 snd_soc_dapm_mutex_lock(dapm);
4609
4610 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4611
4612 snd_soc_dapm_mutex_unlock(dapm);
4613
4614 return ret;
4615 }
4616 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4617
4618 /**
4619 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4620 * @dapm: DAPM context
4621 * @pin: pin name
4622 *
4623 * Enables input/output pin regardless of any other state. This is
4624 * intended for use with microphone bias supplies used in microphone
4625 * jack detection.
4626 *
4627 * Requires external locking.
4628 *
4629 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4630 * do any widget power switching.
4631 */
snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4632 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4633 const char *pin)
4634 {
4635 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4636
4637 if (!w) {
4638 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4639 return -EINVAL;
4640 }
4641
4642 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4643 if (!w->connected) {
4644 /*
4645 * w->force does not affect the number of input or output paths,
4646 * so we only have to recheck if w->connected is changed
4647 */
4648 dapm_widget_invalidate_input_paths(w);
4649 dapm_widget_invalidate_output_paths(w);
4650 w->connected = 1;
4651 }
4652 w->force = 1;
4653 dapm_mark_dirty(w, "force enable");
4654
4655 return 0;
4656 }
4657 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4658
4659 /**
4660 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4661 * @dapm: DAPM context
4662 * @pin: pin name
4663 *
4664 * Enables input/output pin regardless of any other state. This is
4665 * intended for use with microphone bias supplies used in microphone
4666 * jack detection.
4667 *
4668 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4669 * do any widget power switching.
4670 */
snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4671 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4672 const char *pin)
4673 {
4674 int ret;
4675
4676 snd_soc_dapm_mutex_lock(dapm);
4677
4678 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4679
4680 snd_soc_dapm_mutex_unlock(dapm);
4681
4682 return ret;
4683 }
4684 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4685
4686 /**
4687 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4688 * @dapm: DAPM context
4689 * @pin: pin name
4690 *
4691 * Disables input/output pin and its parents or children widgets.
4692 *
4693 * Requires external locking.
4694 *
4695 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4696 * do any widget power switching.
4697 */
snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4698 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4699 const char *pin)
4700 {
4701 return snd_soc_dapm_set_pin(dapm, pin, 0);
4702 }
4703 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4704
4705 /**
4706 * snd_soc_dapm_disable_pin - disable pin.
4707 * @dapm: DAPM context
4708 * @pin: pin name
4709 *
4710 * Disables input/output pin and its parents or children widgets.
4711 *
4712 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4713 * do any widget power switching.
4714 */
snd_soc_dapm_disable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4715 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4716 const char *pin)
4717 {
4718 int ret;
4719
4720 snd_soc_dapm_mutex_lock(dapm);
4721
4722 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4723
4724 snd_soc_dapm_mutex_unlock(dapm);
4725
4726 return ret;
4727 }
4728 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4729
4730 /**
4731 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4732 * @dapm: DAPM context
4733 * @pin: pin name
4734 *
4735 * Marks the specified pin as being not connected, disabling it along
4736 * any parent or child widgets. At present this is identical to
4737 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4738 * additional things such as disabling controls which only affect
4739 * paths through the pin.
4740 *
4741 * Requires external locking.
4742 *
4743 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4744 * do any widget power switching.
4745 */
snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4746 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4747 const char *pin)
4748 {
4749 return snd_soc_dapm_set_pin(dapm, pin, 0);
4750 }
4751 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4752
4753 /**
4754 * snd_soc_dapm_nc_pin - permanently disable pin.
4755 * @dapm: DAPM context
4756 * @pin: pin name
4757 *
4758 * Marks the specified pin as being not connected, disabling it along
4759 * any parent or child widgets. At present this is identical to
4760 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4761 * additional things such as disabling controls which only affect
4762 * paths through the pin.
4763 *
4764 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4765 * do any widget power switching.
4766 */
snd_soc_dapm_nc_pin(struct snd_soc_dapm_context * dapm,const char * pin)4767 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4768 {
4769 int ret;
4770
4771 snd_soc_dapm_mutex_lock(dapm);
4772
4773 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4774
4775 snd_soc_dapm_mutex_unlock(dapm);
4776
4777 return ret;
4778 }
4779 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4780
4781 /**
4782 * snd_soc_dapm_get_pin_status - get audio pin status
4783 * @dapm: DAPM context
4784 * @pin: audio signal pin endpoint (or start point)
4785 *
4786 * Get audio pin status - connected or disconnected.
4787 *
4788 * Returns 1 for connected otherwise 0.
4789 */
snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context * dapm,const char * pin)4790 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4791 const char *pin)
4792 {
4793 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4794
4795 if (w)
4796 return w->connected;
4797
4798 return 0;
4799 }
4800 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4801
4802 /**
4803 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4804 * @dapm: DAPM context
4805 * @pin: audio signal pin endpoint (or start point)
4806 *
4807 * Mark the given endpoint or pin as ignoring suspend. When the
4808 * system is disabled a path between two endpoints flagged as ignoring
4809 * suspend will not be disabled. The path must already be enabled via
4810 * normal means at suspend time, it will not be turned on if it was not
4811 * already enabled.
4812 */
snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context * dapm,const char * pin)4813 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4814 const char *pin)
4815 {
4816 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4817
4818 if (!w) {
4819 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4820 return -EINVAL;
4821 }
4822
4823 w->ignore_suspend = 1;
4824
4825 return 0;
4826 }
4827 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4828
4829 /**
4830 * snd_soc_dapm_free - free dapm resources
4831 * @dapm: DAPM context
4832 *
4833 * Free all dapm widgets and resources.
4834 */
snd_soc_dapm_free(struct snd_soc_dapm_context * dapm)4835 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4836 {
4837 dapm_debugfs_cleanup(dapm);
4838 dapm_free_widgets(dapm);
4839 list_del(&dapm->list);
4840 }
4841 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4842
snd_soc_dapm_init(struct snd_soc_dapm_context * dapm,struct snd_soc_card * card,struct snd_soc_component * component)4843 void snd_soc_dapm_init(struct snd_soc_dapm_context *dapm,
4844 struct snd_soc_card *card,
4845 struct snd_soc_component *component)
4846 {
4847 dapm->card = card;
4848 dapm->component = component;
4849 dapm->bias_level = SND_SOC_BIAS_OFF;
4850
4851 if (component) {
4852 dapm->dev = component->dev;
4853 dapm->idle_bias_off = !component->driver->idle_bias_on;
4854 dapm->suspend_bias_off = component->driver->suspend_bias_off;
4855 } else {
4856 dapm->dev = card->dev;
4857 }
4858
4859 INIT_LIST_HEAD(&dapm->list);
4860 /* see for_each_card_dapms */
4861 list_add(&dapm->list, &card->dapm_list);
4862 }
4863 EXPORT_SYMBOL_GPL(snd_soc_dapm_init);
4864
soc_dapm_shutdown_dapm(struct snd_soc_dapm_context * dapm)4865 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4866 {
4867 struct snd_soc_card *card = dapm->card;
4868 struct snd_soc_dapm_widget *w;
4869 LIST_HEAD(down_list);
4870 int powerdown = 0;
4871
4872 snd_soc_dapm_mutex_lock_root(card);
4873
4874 for_each_card_widgets(dapm->card, w) {
4875 if (w->dapm != dapm)
4876 continue;
4877 if (w->power) {
4878 dapm_seq_insert(w, &down_list, false);
4879 w->new_power = 0;
4880 powerdown = 1;
4881 }
4882 }
4883
4884 /* If there were no widgets to power down we're already in
4885 * standby.
4886 */
4887 if (powerdown) {
4888 if (dapm->bias_level == SND_SOC_BIAS_ON)
4889 snd_soc_dapm_set_bias_level(dapm,
4890 SND_SOC_BIAS_PREPARE);
4891 dapm_seq_run(card, &down_list, 0, false);
4892 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4893 snd_soc_dapm_set_bias_level(dapm,
4894 SND_SOC_BIAS_STANDBY);
4895 }
4896
4897 snd_soc_dapm_mutex_unlock(card);
4898 }
4899
4900 /*
4901 * snd_soc_dapm_shutdown - callback for system shutdown
4902 */
snd_soc_dapm_shutdown(struct snd_soc_card * card)4903 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4904 {
4905 struct snd_soc_dapm_context *dapm;
4906
4907 for_each_card_dapms(card, dapm) {
4908 if (dapm != &card->dapm) {
4909 soc_dapm_shutdown_dapm(dapm);
4910 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4911 snd_soc_dapm_set_bias_level(dapm,
4912 SND_SOC_BIAS_OFF);
4913 }
4914 }
4915
4916 soc_dapm_shutdown_dapm(&card->dapm);
4917 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4918 snd_soc_dapm_set_bias_level(&card->dapm,
4919 SND_SOC_BIAS_OFF);
4920 }
4921
4922 /* Module information */
4923 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4924 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4925 MODULE_LICENSE("GPL");
4926