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/cleanup.h>
24 #include <linux/delay.h>
25 #include <linux/pm.h>
26 #include <linux/bitops.h>
27 #include <linux/platform_device.h>
28 #include <linux/jiffies.h>
29 #include <linux/debugfs.h>
30 #include <linux/pm_runtime.h>
31 #include <linux/regulator/consumer.h>
32 #include <linux/pinctrl/consumer.h>
33 #include <linux/clk.h>
34 #include <linux/slab.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/initval.h>
40
41 #include <trace/events/asoc.h>
42
43 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
44
45 #define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
46 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
47
48 #define snd_soc_dapm_for_each_direction(dir) \
49 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
50 (dir)++)
51
52 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
53 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
54 const char *control,
55 int (*connected)(struct snd_soc_dapm_widget *source,
56 struct snd_soc_dapm_widget *sink));
57
58 struct snd_soc_dapm_widget *
59 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
60 const struct snd_soc_dapm_widget *widget);
61
62 struct snd_soc_dapm_widget *
63 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
64 const struct snd_soc_dapm_widget *widget);
65
66 static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg);
67
68 /* dapm power sequences - make this per codec in the future */
69 static int dapm_up_seq[] = {
70 [snd_soc_dapm_pre] = 1,
71 [snd_soc_dapm_regulator_supply] = 2,
72 [snd_soc_dapm_pinctrl] = 2,
73 [snd_soc_dapm_clock_supply] = 2,
74 [snd_soc_dapm_supply] = 3,
75 [snd_soc_dapm_dai_link] = 3,
76 [snd_soc_dapm_micbias] = 4,
77 [snd_soc_dapm_vmid] = 4,
78 [snd_soc_dapm_dai_in] = 5,
79 [snd_soc_dapm_dai_out] = 5,
80 [snd_soc_dapm_aif_in] = 5,
81 [snd_soc_dapm_aif_out] = 5,
82 [snd_soc_dapm_mic] = 6,
83 [snd_soc_dapm_siggen] = 6,
84 [snd_soc_dapm_input] = 6,
85 [snd_soc_dapm_output] = 6,
86 [snd_soc_dapm_mux] = 7,
87 [snd_soc_dapm_demux] = 7,
88 [snd_soc_dapm_dac] = 8,
89 [snd_soc_dapm_switch] = 9,
90 [snd_soc_dapm_mixer] = 9,
91 [snd_soc_dapm_mixer_named_ctl] = 9,
92 [snd_soc_dapm_pga] = 10,
93 [snd_soc_dapm_buffer] = 10,
94 [snd_soc_dapm_scheduler] = 10,
95 [snd_soc_dapm_effect] = 10,
96 [snd_soc_dapm_src] = 10,
97 [snd_soc_dapm_asrc] = 10,
98 [snd_soc_dapm_encoder] = 10,
99 [snd_soc_dapm_decoder] = 10,
100 [snd_soc_dapm_adc] = 11,
101 [snd_soc_dapm_out_drv] = 12,
102 [snd_soc_dapm_hp] = 12,
103 [snd_soc_dapm_line] = 12,
104 [snd_soc_dapm_sink] = 12,
105 [snd_soc_dapm_spk] = 13,
106 [snd_soc_dapm_kcontrol] = 14,
107 [snd_soc_dapm_post] = 15,
108 };
109
110 static int dapm_down_seq[] = {
111 [snd_soc_dapm_pre] = 1,
112 [snd_soc_dapm_kcontrol] = 2,
113 [snd_soc_dapm_adc] = 3,
114 [snd_soc_dapm_spk] = 4,
115 [snd_soc_dapm_hp] = 5,
116 [snd_soc_dapm_line] = 5,
117 [snd_soc_dapm_out_drv] = 5,
118 [snd_soc_dapm_sink] = 6,
119 [snd_soc_dapm_pga] = 6,
120 [snd_soc_dapm_buffer] = 6,
121 [snd_soc_dapm_scheduler] = 6,
122 [snd_soc_dapm_effect] = 6,
123 [snd_soc_dapm_src] = 6,
124 [snd_soc_dapm_asrc] = 6,
125 [snd_soc_dapm_encoder] = 6,
126 [snd_soc_dapm_decoder] = 6,
127 [snd_soc_dapm_switch] = 7,
128 [snd_soc_dapm_mixer_named_ctl] = 7,
129 [snd_soc_dapm_mixer] = 7,
130 [snd_soc_dapm_dac] = 8,
131 [snd_soc_dapm_mic] = 9,
132 [snd_soc_dapm_siggen] = 9,
133 [snd_soc_dapm_input] = 9,
134 [snd_soc_dapm_output] = 9,
135 [snd_soc_dapm_micbias] = 10,
136 [snd_soc_dapm_vmid] = 10,
137 [snd_soc_dapm_mux] = 11,
138 [snd_soc_dapm_demux] = 11,
139 [snd_soc_dapm_aif_in] = 12,
140 [snd_soc_dapm_aif_out] = 12,
141 [snd_soc_dapm_dai_in] = 12,
142 [snd_soc_dapm_dai_out] = 12,
143 [snd_soc_dapm_dai_link] = 13,
144 [snd_soc_dapm_supply] = 14,
145 [snd_soc_dapm_clock_supply] = 15,
146 [snd_soc_dapm_pinctrl] = 15,
147 [snd_soc_dapm_regulator_supply] = 15,
148 [snd_soc_dapm_post] = 16,
149 };
150
dapm_assert_locked(struct snd_soc_dapm_context * dapm)151 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
152 {
153 if (snd_soc_card_is_instantiated(dapm->card))
154 snd_soc_dapm_mutex_assert_held(dapm);
155 }
156
pop_wait(u32 pop_time)157 static void pop_wait(u32 pop_time)
158 {
159 if (pop_time)
160 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
161 }
162
163 __printf(3, 4)
pop_dbg(struct device * dev,u32 pop_time,const char * fmt,...)164 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
165 {
166 va_list args;
167 char *buf;
168
169 if (!pop_time)
170 return;
171
172 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
173 if (buf == NULL)
174 return;
175
176 va_start(args, fmt);
177 vsnprintf(buf, PAGE_SIZE, fmt, args);
178 dev_info(dev, "%s", buf);
179 va_end(args);
180
181 kfree(buf);
182 }
183
dapm_dirty_widget(struct snd_soc_dapm_widget * w)184 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
185 {
186 return !list_empty(&w->dirty);
187 }
188
dapm_mark_dirty(struct snd_soc_dapm_widget * w,const char * reason)189 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
190 {
191 dapm_assert_locked(w->dapm);
192
193 if (!dapm_dirty_widget(w)) {
194 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
195 w->name, reason);
196 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
197 }
198 }
199
200 /*
201 * Common implementation for dapm_widget_invalidate_input_paths() and
202 * dapm_widget_invalidate_output_paths(). The function is inlined since the
203 * combined size of the two specialized functions is only marginally larger then
204 * the size of the generic function and at the same time the fast path of the
205 * specialized functions is significantly smaller than the generic function.
206 */
dapm_widget_invalidate_paths(struct snd_soc_dapm_widget * w,enum snd_soc_dapm_direction dir)207 static __always_inline void dapm_widget_invalidate_paths(
208 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
209 {
210 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
211 struct snd_soc_dapm_widget *node;
212 struct snd_soc_dapm_path *p;
213 LIST_HEAD(list);
214
215 dapm_assert_locked(w->dapm);
216
217 if (w->endpoints[dir] == -1)
218 return;
219
220 list_add_tail(&w->work_list, &list);
221 w->endpoints[dir] = -1;
222
223 list_for_each_entry(w, &list, work_list) {
224 snd_soc_dapm_widget_for_each_path(w, dir, p) {
225 if (p->is_supply || p->weak || !p->connect)
226 continue;
227 node = p->node[rdir];
228 if (node->endpoints[dir] != -1) {
229 node->endpoints[dir] = -1;
230 list_add_tail(&node->work_list, &list);
231 }
232 }
233 }
234 }
235
236 /*
237 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
238 * input paths
239 * @w: The widget for which to invalidate the cached number of input paths
240 *
241 * Resets the cached number of inputs for the specified widget and all widgets
242 * that can be reached via outcoming paths from the widget.
243 *
244 * This function must be called if the number of output paths for a widget might
245 * have changed. E.g. if the source state of a widget changes or a path is added
246 * or activated with the widget as the sink.
247 */
dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget * w)248 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
249 {
250 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
251 }
252
253 /*
254 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
255 * output paths
256 * @w: The widget for which to invalidate the cached number of output paths
257 *
258 * Resets the cached number of outputs for the specified widget and all widgets
259 * that can be reached via incoming paths from the widget.
260 *
261 * This function must be called if the number of output paths for a widget might
262 * have changed. E.g. if the sink state of a widget changes or a path is added
263 * or activated with the widget as the source.
264 */
dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget * w)265 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
266 {
267 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
268 }
269
270 /*
271 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
272 * for the widgets connected to a path
273 * @p: The path to invalidate
274 *
275 * Resets the cached number of inputs for the sink of the path and the cached
276 * number of outputs for the source of the path.
277 *
278 * This function must be called when a path is added, removed or the connected
279 * state changes.
280 */
dapm_path_invalidate(struct snd_soc_dapm_path * p)281 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
282 {
283 /*
284 * Weak paths or supply paths do not influence the number of input or
285 * output paths of their neighbors.
286 */
287 if (p->weak || p->is_supply)
288 return;
289
290 /*
291 * The number of connected endpoints is the sum of the number of
292 * connected endpoints of all neighbors. If a node with 0 connected
293 * endpoints is either connected or disconnected that sum won't change,
294 * so there is no need to re-check the path.
295 */
296 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
297 dapm_widget_invalidate_input_paths(p->sink);
298 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
299 dapm_widget_invalidate_output_paths(p->source);
300 }
301
dapm_mark_endpoints_dirty(struct snd_soc_card * card)302 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
303 {
304 struct snd_soc_dapm_widget *w;
305
306 snd_soc_dapm_mutex_lock_root(card);
307
308 for_each_card_widgets(card, w) {
309 if (w->is_ep) {
310 dapm_mark_dirty(w, "Rechecking endpoints");
311 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
312 dapm_widget_invalidate_output_paths(w);
313 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
314 dapm_widget_invalidate_input_paths(w);
315 }
316 }
317
318 snd_soc_dapm_mutex_unlock(card);
319 }
320 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
321
322 /* create a new dapm widget */
dapm_cnew_widget(const struct snd_soc_dapm_widget * _widget,const char * prefix)323 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
324 const struct snd_soc_dapm_widget *_widget,
325 const char *prefix)
326 {
327 struct snd_soc_dapm_widget *w __free(kfree) = kmemdup(_widget,
328 sizeof(*_widget),
329 GFP_KERNEL);
330 if (!w)
331 return NULL;
332
333 if (prefix)
334 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, _widget->name);
335 else
336 w->name = kstrdup_const(_widget->name, GFP_KERNEL);
337 if (!w->name)
338 return NULL;
339
340 if (_widget->sname) {
341 w->sname = kstrdup_const(_widget->sname, GFP_KERNEL);
342 if (!w->sname) {
343 kfree_const(w->name);
344 return NULL;
345 }
346 }
347
348 return_ptr(w);
349 }
350
351 struct dapm_kcontrol_data {
352 unsigned int value;
353 struct snd_soc_dapm_widget *widget;
354 struct list_head paths;
355 struct snd_soc_dapm_widget_list *wlist;
356 };
357
dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget * widget,struct snd_kcontrol * kcontrol,const char * ctrl_name)358 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
359 struct snd_kcontrol *kcontrol, const char *ctrl_name)
360 {
361 struct dapm_kcontrol_data *data;
362 struct soc_mixer_control *mc;
363 struct soc_enum *e;
364 const char *name;
365 int ret;
366
367 data = kzalloc(sizeof(*data), GFP_KERNEL);
368 if (!data)
369 return -ENOMEM;
370
371 INIT_LIST_HEAD(&data->paths);
372
373 switch (widget->id) {
374 case snd_soc_dapm_switch:
375 case snd_soc_dapm_mixer:
376 case snd_soc_dapm_mixer_named_ctl:
377 mc = (struct soc_mixer_control *)kcontrol->private_value;
378
379 if (mc->autodisable) {
380 struct snd_soc_dapm_widget template;
381
382 if (snd_soc_volsw_is_stereo(mc))
383 dev_warn(widget->dapm->dev,
384 "ASoC: Unsupported stereo autodisable control '%s'\n",
385 ctrl_name);
386
387 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
388 "Autodisable");
389 if (!name) {
390 ret = -ENOMEM;
391 goto err_data;
392 }
393
394 memset(&template, 0, sizeof(template));
395 template.reg = mc->reg;
396 template.mask = (1 << fls(mc->max)) - 1;
397 template.shift = mc->shift;
398 if (mc->invert)
399 template.off_val = mc->max;
400 else
401 template.off_val = 0;
402 template.on_val = template.off_val;
403 template.id = snd_soc_dapm_kcontrol;
404 template.name = name;
405
406 data->value = template.on_val;
407
408 data->widget =
409 snd_soc_dapm_new_control_unlocked(widget->dapm,
410 &template);
411 kfree(name);
412 if (IS_ERR(data->widget)) {
413 ret = PTR_ERR(data->widget);
414 goto err_data;
415 }
416 }
417 break;
418 case snd_soc_dapm_demux:
419 case snd_soc_dapm_mux:
420 e = (struct soc_enum *)kcontrol->private_value;
421
422 if (e->autodisable) {
423 struct snd_soc_dapm_widget template;
424
425 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
426 "Autodisable");
427 if (!name) {
428 ret = -ENOMEM;
429 goto err_data;
430 }
431
432 memset(&template, 0, sizeof(template));
433 template.reg = e->reg;
434 template.mask = e->mask;
435 template.shift = e->shift_l;
436 template.off_val = snd_soc_enum_item_to_val(e, 0);
437 template.on_val = template.off_val;
438 template.id = snd_soc_dapm_kcontrol;
439 template.name = name;
440
441 data->value = template.on_val;
442
443 data->widget = snd_soc_dapm_new_control_unlocked(
444 widget->dapm, &template);
445 kfree(name);
446 if (IS_ERR(data->widget)) {
447 ret = PTR_ERR(data->widget);
448 goto err_data;
449 }
450
451 snd_soc_dapm_add_path(widget->dapm, data->widget,
452 widget, NULL, NULL);
453 } else if (e->reg != SND_SOC_NOPM) {
454 data->value = soc_dapm_read(widget->dapm, e->reg) &
455 (e->mask << e->shift_l);
456 }
457 break;
458 default:
459 break;
460 }
461
462 kcontrol->private_data = data;
463
464 return 0;
465
466 err_data:
467 kfree(data);
468 return ret;
469 }
470
dapm_kcontrol_free(struct snd_kcontrol * kctl)471 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
472 {
473 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
474
475 list_del(&data->paths);
476 kfree(data->wlist);
477 kfree(data);
478 }
479
dapm_kcontrol_get_wlist(const struct snd_kcontrol * kcontrol)480 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
481 const struct snd_kcontrol *kcontrol)
482 {
483 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
484
485 return data->wlist;
486 }
487
dapm_kcontrol_add_widget(struct snd_kcontrol * kcontrol,struct snd_soc_dapm_widget * widget)488 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
489 struct snd_soc_dapm_widget *widget)
490 {
491 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
492 struct snd_soc_dapm_widget_list *new_wlist;
493 unsigned int n;
494
495 if (data->wlist)
496 n = data->wlist->num_widgets + 1;
497 else
498 n = 1;
499
500 new_wlist = krealloc(data->wlist,
501 struct_size(new_wlist, widgets, n),
502 GFP_KERNEL);
503 if (!new_wlist)
504 return -ENOMEM;
505
506 new_wlist->num_widgets = n;
507 new_wlist->widgets[n - 1] = widget;
508
509 data->wlist = new_wlist;
510
511 return 0;
512 }
513
dapm_kcontrol_add_path(const struct snd_kcontrol * kcontrol,struct snd_soc_dapm_path * path)514 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
515 struct snd_soc_dapm_path *path)
516 {
517 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
518
519 list_add_tail(&path->list_kcontrol, &data->paths);
520 }
521
dapm_kcontrol_is_powered(const struct snd_kcontrol * kcontrol)522 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
523 {
524 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
525
526 if (!data->widget)
527 return true;
528
529 return data->widget->power;
530 }
531
dapm_kcontrol_get_path_list(const struct snd_kcontrol * kcontrol)532 static struct list_head *dapm_kcontrol_get_path_list(
533 const struct snd_kcontrol *kcontrol)
534 {
535 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
536
537 return &data->paths;
538 }
539
540 #define dapm_kcontrol_for_each_path(path, kcontrol) \
541 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
542 list_kcontrol)
543
dapm_kcontrol_get_value(const struct snd_kcontrol * kcontrol)544 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
545 {
546 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
547
548 return data->value;
549 }
550 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
551
dapm_kcontrol_set_value(const struct snd_kcontrol * kcontrol,unsigned int value)552 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
553 unsigned int value)
554 {
555 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
556
557 if (data->value == value)
558 return false;
559
560 if (data->widget) {
561 switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
562 case snd_soc_dapm_switch:
563 case snd_soc_dapm_mixer:
564 case snd_soc_dapm_mixer_named_ctl:
565 data->widget->on_val = value & data->widget->mask;
566 break;
567 case snd_soc_dapm_demux:
568 case snd_soc_dapm_mux:
569 data->widget->on_val = value >> data->widget->shift;
570 break;
571 default:
572 data->widget->on_val = value;
573 break;
574 }
575 }
576
577 data->value = value;
578
579 return true;
580 }
581
582 /**
583 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
584 * kcontrol
585 * @kcontrol: The kcontrol
586 */
snd_soc_dapm_kcontrol_widget(struct snd_kcontrol * kcontrol)587 struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
588 struct snd_kcontrol *kcontrol)
589 {
590 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
591 }
592 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
593
594 /**
595 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
596 * kcontrol
597 * @kcontrol: The kcontrol
598 *
599 * Note: This function must only be used on kcontrols that are known to have
600 * been registered for a CODEC. Otherwise the behaviour is undefined.
601 */
snd_soc_dapm_kcontrol_dapm(struct snd_kcontrol * kcontrol)602 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
603 struct snd_kcontrol *kcontrol)
604 {
605 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
606 }
607 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
608
dapm_reset(struct snd_soc_card * card)609 static void dapm_reset(struct snd_soc_card *card)
610 {
611 struct snd_soc_dapm_widget *w;
612
613 snd_soc_dapm_mutex_assert_held(card);
614
615 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
616
617 for_each_card_widgets(card, w) {
618 w->new_power = w->power;
619 w->power_checked = false;
620 }
621 }
622
soc_dapm_prefix(struct snd_soc_dapm_context * dapm)623 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
624 {
625 if (!dapm->component)
626 return NULL;
627 return dapm->component->name_prefix;
628 }
629
soc_dapm_read(struct snd_soc_dapm_context * dapm,int reg)630 static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg)
631 {
632 if (!dapm->component)
633 return -EIO;
634 return snd_soc_component_read(dapm->component, reg);
635 }
636
soc_dapm_update_bits(struct snd_soc_dapm_context * dapm,int reg,unsigned int mask,unsigned int value)637 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
638 int reg, unsigned int mask, unsigned int value)
639 {
640 if (!dapm->component)
641 return -EIO;
642 return snd_soc_component_update_bits(dapm->component, reg,
643 mask, value);
644 }
645
soc_dapm_test_bits(struct snd_soc_dapm_context * dapm,int reg,unsigned int mask,unsigned int value)646 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
647 int reg, unsigned int mask, unsigned int value)
648 {
649 if (!dapm->component)
650 return -EIO;
651 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
652 }
653
soc_dapm_async_complete(struct snd_soc_dapm_context * dapm)654 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
655 {
656 if (dapm->component)
657 snd_soc_component_async_complete(dapm->component);
658 }
659
660 static struct snd_soc_dapm_widget *
dapm_wcache_lookup(struct snd_soc_dapm_widget * w,const char * name)661 dapm_wcache_lookup(struct snd_soc_dapm_widget *w, const char *name)
662 {
663 if (w) {
664 struct list_head *wlist = &w->dapm->card->widgets;
665 const int depth = 2;
666 int i = 0;
667
668 list_for_each_entry_from(w, wlist, list) {
669 if (!strcmp(name, w->name))
670 return w;
671
672 if (++i == depth)
673 break;
674 }
675 }
676
677 return NULL;
678 }
679
680 /**
681 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
682 * @dapm: The DAPM context for which to set the level
683 * @level: The level to set
684 *
685 * Forces the DAPM bias level to a specific state. It will call the bias level
686 * callback of DAPM context with the specified level. This will even happen if
687 * the context is already at the same level. Furthermore it will not go through
688 * the normal bias level sequencing, meaning any intermediate states between the
689 * current and the target state will not be entered.
690 *
691 * Note that the change in bias level is only temporary and the next time
692 * snd_soc_dapm_sync() is called the state will be set to the level as
693 * determined by the DAPM core. The function is mainly intended to be used to
694 * used during probe or resume from suspend to power up the device so
695 * initialization can be done, before the DAPM core takes over.
696 */
snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)697 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
698 enum snd_soc_bias_level level)
699 {
700 int ret = 0;
701
702 if (dapm->component)
703 ret = snd_soc_component_set_bias_level(dapm->component, level);
704
705 if (ret == 0)
706 dapm->bias_level = level;
707
708 return ret;
709 }
710 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
711
712 /**
713 * snd_soc_dapm_set_bias_level - set the bias level for the system
714 * @dapm: DAPM context
715 * @level: level to configure
716 *
717 * Configure the bias (power) levels for the SoC audio device.
718 *
719 * Returns 0 for success else error.
720 */
snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)721 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
722 enum snd_soc_bias_level level)
723 {
724 struct snd_soc_card *card = dapm->card;
725 int ret = 0;
726
727 trace_snd_soc_bias_level_start(dapm, level);
728
729 ret = snd_soc_card_set_bias_level(card, dapm, level);
730 if (ret != 0)
731 goto out;
732
733 if (!card || dapm != &card->dapm)
734 ret = snd_soc_dapm_force_bias_level(dapm, level);
735
736 if (ret != 0)
737 goto out;
738
739 ret = snd_soc_card_set_bias_level_post(card, dapm, level);
740 out:
741 trace_snd_soc_bias_level_done(dapm, level);
742
743 return ret;
744 }
745
746 /* 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)747 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
748 struct snd_soc_dapm_path *path, const char *control_name,
749 struct snd_soc_dapm_widget *w)
750 {
751 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
752 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
753 unsigned int item;
754 int i;
755
756 if (e->reg != SND_SOC_NOPM) {
757 unsigned int val;
758 val = soc_dapm_read(dapm, e->reg);
759 val = (val >> e->shift_l) & e->mask;
760 item = snd_soc_enum_val_to_item(e, val);
761 } else {
762 /* since a virtual mux has no backing registers to
763 * decide which path to connect, it will try to match
764 * with the first enumeration. This is to ensure
765 * that the default mux choice (the first) will be
766 * correctly powered up during initialization.
767 */
768 item = 0;
769 }
770
771 i = match_string(e->texts, e->items, control_name);
772 if (i < 0)
773 return -ENODEV;
774
775 path->name = e->texts[i];
776 path->connect = (i == item);
777 return 0;
778
779 }
780
781 /* set up initial codec paths */
dapm_set_mixer_path_status(struct snd_soc_dapm_path * p,int i,int nth_path)782 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
783 int nth_path)
784 {
785 struct soc_mixer_control *mc = (struct soc_mixer_control *)
786 p->sink->kcontrol_news[i].private_value;
787 unsigned int reg = mc->reg;
788 unsigned int invert = mc->invert;
789
790 if (reg != SND_SOC_NOPM) {
791 unsigned int shift = mc->shift;
792 unsigned int max = mc->max;
793 unsigned int mask = (1 << fls(max)) - 1;
794 unsigned int val = soc_dapm_read(p->sink->dapm, reg);
795
796 /*
797 * The nth_path argument allows this function to know
798 * which path of a kcontrol it is setting the initial
799 * status for. Ideally this would support any number
800 * of paths and channels. But since kcontrols only come
801 * in mono and stereo variants, we are limited to 2
802 * channels.
803 *
804 * The following code assumes for stereo controls the
805 * first path is the left channel, and all remaining
806 * paths are the right channel.
807 */
808 if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) {
809 if (reg != mc->rreg)
810 val = soc_dapm_read(p->sink->dapm, mc->rreg);
811 val = (val >> mc->rshift) & mask;
812 } else {
813 val = (val >> shift) & mask;
814 }
815 if (invert)
816 val = max - val;
817 p->connect = !!val;
818 } else {
819 /* since a virtual mixer has no backing registers to
820 * decide which path to connect, it will try to match
821 * with initial state. This is to ensure
822 * that the default mixer choice will be
823 * correctly powered up during initialization.
824 */
825 p->connect = invert;
826 }
827 }
828
829 /* 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)830 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
831 struct snd_soc_dapm_path *path, const char *control_name)
832 {
833 int i, nth_path = 0;
834
835 /* search for mixer kcontrol */
836 for (i = 0; i < path->sink->num_kcontrols; i++) {
837 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
838 path->name = path->sink->kcontrol_news[i].name;
839 dapm_set_mixer_path_status(path, i, nth_path++);
840 return 0;
841 }
842 }
843 return -ENODEV;
844 }
845
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)846 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
847 struct snd_soc_dapm_widget *kcontrolw,
848 const struct snd_kcontrol_new *kcontrol_new,
849 struct snd_kcontrol **kcontrol)
850 {
851 struct snd_soc_dapm_widget *w;
852 int i;
853
854 *kcontrol = NULL;
855
856 for_each_card_widgets(dapm->card, w) {
857 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
858 continue;
859 for (i = 0; i < w->num_kcontrols; i++) {
860 if (&w->kcontrol_news[i] == kcontrol_new) {
861 if (w->kcontrols)
862 *kcontrol = w->kcontrols[i];
863 return 1;
864 }
865 }
866 }
867
868 return 0;
869 }
870
871 /*
872 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
873 * create it. Either way, add the widget into the control's widget list
874 */
dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget * w,int kci)875 static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
876 int kci)
877 {
878 struct snd_soc_dapm_context *dapm = w->dapm;
879 struct snd_card *card = dapm->card->snd_card;
880 const char *prefix;
881 size_t prefix_len;
882 int shared;
883 struct snd_kcontrol *kcontrol;
884 bool wname_in_long_name, kcname_in_long_name;
885 char *long_name = NULL;
886 const char *name;
887 int ret = 0;
888
889 prefix = soc_dapm_prefix(dapm);
890 if (prefix)
891 prefix_len = strlen(prefix) + 1;
892 else
893 prefix_len = 0;
894
895 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
896 &kcontrol);
897
898 if (!kcontrol) {
899 if (shared) {
900 wname_in_long_name = false;
901 kcname_in_long_name = true;
902 } else {
903 switch (w->id) {
904 case snd_soc_dapm_switch:
905 case snd_soc_dapm_mixer:
906 case snd_soc_dapm_pga:
907 case snd_soc_dapm_effect:
908 case snd_soc_dapm_out_drv:
909 wname_in_long_name = true;
910 kcname_in_long_name = true;
911 break;
912 case snd_soc_dapm_mixer_named_ctl:
913 wname_in_long_name = false;
914 kcname_in_long_name = true;
915 break;
916 case snd_soc_dapm_demux:
917 case snd_soc_dapm_mux:
918 wname_in_long_name = true;
919 kcname_in_long_name = false;
920 break;
921 default:
922 return -EINVAL;
923 }
924 }
925 if (w->no_wname_in_kcontrol_name)
926 wname_in_long_name = false;
927
928 if (wname_in_long_name && kcname_in_long_name) {
929 /*
930 * The control will get a prefix from the control
931 * creation process but we're also using the same
932 * prefix for widgets so cut the prefix off the
933 * front of the widget name.
934 */
935 long_name = kasprintf(GFP_KERNEL, "%s %s",
936 w->name + prefix_len,
937 w->kcontrol_news[kci].name);
938 if (long_name == NULL)
939 return -ENOMEM;
940
941 name = long_name;
942 } else if (wname_in_long_name) {
943 long_name = NULL;
944 name = w->name + prefix_len;
945 } else {
946 long_name = NULL;
947 name = w->kcontrol_news[kci].name;
948 }
949
950 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
951 prefix);
952 if (!kcontrol) {
953 ret = -ENOMEM;
954 goto exit_free;
955 }
956
957 kcontrol->private_free = dapm_kcontrol_free;
958
959 ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
960 if (ret) {
961 snd_ctl_free_one(kcontrol);
962 goto exit_free;
963 }
964
965 ret = snd_ctl_add(card, kcontrol);
966 if (ret < 0) {
967 dev_err(dapm->dev,
968 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
969 w->name, name, ret);
970 goto exit_free;
971 }
972 }
973
974 ret = dapm_kcontrol_add_widget(kcontrol, w);
975 if (ret == 0)
976 w->kcontrols[kci] = kcontrol;
977
978 exit_free:
979 kfree(long_name);
980
981 return ret;
982 }
983
984 /* create new dapm mixer control */
dapm_new_mixer(struct snd_soc_dapm_widget * w)985 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
986 {
987 int i, ret;
988 struct snd_soc_dapm_path *path;
989 struct dapm_kcontrol_data *data;
990
991 /* add kcontrol */
992 for (i = 0; i < w->num_kcontrols; i++) {
993 /* match name */
994 snd_soc_dapm_widget_for_each_source_path(w, path) {
995 /* mixer/mux paths name must match control name */
996 if (path->name != (char *)w->kcontrol_news[i].name)
997 continue;
998
999 if (!w->kcontrols[i]) {
1000 ret = dapm_create_or_share_kcontrol(w, i);
1001 if (ret < 0)
1002 return ret;
1003 }
1004
1005 dapm_kcontrol_add_path(w->kcontrols[i], path);
1006
1007 data = snd_kcontrol_chip(w->kcontrols[i]);
1008 if (data->widget)
1009 snd_soc_dapm_add_path(data->widget->dapm,
1010 data->widget,
1011 path->source,
1012 NULL, NULL);
1013 }
1014 }
1015
1016 return 0;
1017 }
1018
1019 /* create new dapm mux control */
dapm_new_mux(struct snd_soc_dapm_widget * w)1020 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
1021 {
1022 struct snd_soc_dapm_context *dapm = w->dapm;
1023 enum snd_soc_dapm_direction dir;
1024 struct snd_soc_dapm_path *path;
1025 const char *type;
1026 int ret;
1027
1028 switch (w->id) {
1029 case snd_soc_dapm_mux:
1030 dir = SND_SOC_DAPM_DIR_OUT;
1031 type = "mux";
1032 break;
1033 case snd_soc_dapm_demux:
1034 dir = SND_SOC_DAPM_DIR_IN;
1035 type = "demux";
1036 break;
1037 default:
1038 return -EINVAL;
1039 }
1040
1041 if (w->num_kcontrols != 1) {
1042 dev_err(dapm->dev,
1043 "ASoC: %s %s has incorrect number of controls\n", type,
1044 w->name);
1045 return -EINVAL;
1046 }
1047
1048 if (list_empty(&w->edges[dir])) {
1049 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
1050 return -EINVAL;
1051 }
1052
1053 ret = dapm_create_or_share_kcontrol(w, 0);
1054 if (ret < 0)
1055 return ret;
1056
1057 snd_soc_dapm_widget_for_each_path(w, dir, path) {
1058 if (path->name)
1059 dapm_kcontrol_add_path(w->kcontrols[0], path);
1060 }
1061
1062 return 0;
1063 }
1064
1065 /* create new dapm volume control */
dapm_new_pga(struct snd_soc_dapm_widget * w)1066 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
1067 {
1068 int i;
1069
1070 for (i = 0; i < w->num_kcontrols; i++) {
1071 int ret = dapm_create_or_share_kcontrol(w, i);
1072 if (ret < 0)
1073 return ret;
1074 }
1075
1076 return 0;
1077 }
1078
1079 /* create new dapm dai link control */
dapm_new_dai_link(struct snd_soc_dapm_widget * w)1080 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1081 {
1082 int i;
1083 struct snd_soc_pcm_runtime *rtd = w->priv;
1084
1085 /* create control for links with > 1 config */
1086 if (rtd->dai_link->num_c2c_params <= 1)
1087 return 0;
1088
1089 /* add kcontrol */
1090 for (i = 0; i < w->num_kcontrols; i++) {
1091 struct snd_soc_dapm_context *dapm = w->dapm;
1092 struct snd_card *card = dapm->card->snd_card;
1093 struct snd_kcontrol *kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
1094 w, w->name, NULL);
1095 int ret = snd_ctl_add(card, kcontrol);
1096
1097 if (ret < 0) {
1098 dev_err(dapm->dev,
1099 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1100 w->name, w->kcontrol_news[i].name, ret);
1101 return ret;
1102 }
1103 kcontrol->private_data = w;
1104 w->kcontrols[i] = kcontrol;
1105 }
1106
1107 return 0;
1108 }
1109
1110 /* We implement power down on suspend by checking the power state of
1111 * the ALSA card - when we are suspending the ALSA state for the card
1112 * is set to D3.
1113 */
snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget * widget)1114 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1115 {
1116 int level = snd_power_get_state(widget->dapm->card->snd_card);
1117
1118 switch (level) {
1119 case SNDRV_CTL_POWER_D3hot:
1120 case SNDRV_CTL_POWER_D3cold:
1121 if (widget->ignore_suspend)
1122 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1123 widget->name);
1124 return widget->ignore_suspend;
1125 default:
1126 return 1;
1127 }
1128 }
1129
dapm_widget_list_free(struct snd_soc_dapm_widget_list ** list)1130 static void dapm_widget_list_free(struct snd_soc_dapm_widget_list **list)
1131 {
1132 kfree(*list);
1133 }
1134
dapm_widget_list_create(struct snd_soc_dapm_widget_list ** list,struct list_head * widgets)1135 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1136 struct list_head *widgets)
1137 {
1138 struct snd_soc_dapm_widget *w;
1139 struct list_head *it;
1140 unsigned int size = 0;
1141 unsigned int i = 0;
1142
1143 list_for_each(it, widgets)
1144 size++;
1145
1146 *list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL);
1147 if (*list == NULL)
1148 return -ENOMEM;
1149
1150 (*list)->num_widgets = size;
1151
1152 list_for_each_entry(w, widgets, work_list)
1153 (*list)->widgets[i++] = w;
1154
1155 (*list)->num_widgets = i;
1156
1157 return 0;
1158 }
1159
1160 /*
1161 * Recursively reset the cached number of inputs or outputs for the specified
1162 * widget and all widgets that can be reached via incoming or outcoming paths
1163 * from the widget.
1164 */
invalidate_paths_ep(struct snd_soc_dapm_widget * widget,enum snd_soc_dapm_direction dir)1165 static void invalidate_paths_ep(struct snd_soc_dapm_widget *widget,
1166 enum snd_soc_dapm_direction dir)
1167 {
1168 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1169 struct snd_soc_dapm_path *path;
1170
1171 widget->endpoints[dir] = -1;
1172
1173 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1174 if (path->weak || path->is_supply)
1175 continue;
1176
1177 if (path->walking)
1178 return;
1179
1180 if (path->connect) {
1181 path->walking = 1;
1182 invalidate_paths_ep(path->node[dir], dir);
1183 path->walking = 0;
1184 }
1185 }
1186 }
1187
1188 /*
1189 * Common implementation for is_connected_output_ep() and
1190 * is_connected_input_ep(). The function is inlined since the combined size of
1191 * the two specialized functions is only marginally larger then the size of the
1192 * generic function and at the same time the fast path of the specialized
1193 * functions is significantly smaller than the generic function.
1194 */
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))1195 static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1196 struct list_head *list, enum snd_soc_dapm_direction dir,
1197 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
1198 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1199 enum snd_soc_dapm_direction)),
1200 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1201 enum snd_soc_dapm_direction))
1202 {
1203 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1204 struct snd_soc_dapm_path *path;
1205 int con = 0;
1206
1207 if (widget->endpoints[dir] >= 0)
1208 return widget->endpoints[dir];
1209
1210 DAPM_UPDATE_STAT(widget, path_checks);
1211
1212 /* do we need to add this widget to the list ? */
1213 if (list)
1214 list_add_tail(&widget->work_list, list);
1215
1216 if (custom_stop_condition && custom_stop_condition(widget, dir)) {
1217 list = NULL;
1218 custom_stop_condition = NULL;
1219 }
1220
1221 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1222 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1223 return widget->endpoints[dir];
1224 }
1225
1226 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1227 DAPM_UPDATE_STAT(widget, neighbour_checks);
1228
1229 if (path->weak || path->is_supply)
1230 continue;
1231
1232 if (path->walking)
1233 return 1;
1234
1235 trace_snd_soc_dapm_path(widget, dir, path);
1236
1237 if (path->connect) {
1238 path->walking = 1;
1239 con += fn(path->node[dir], list, custom_stop_condition);
1240 path->walking = 0;
1241 }
1242 }
1243
1244 widget->endpoints[dir] = con;
1245
1246 return con;
1247 }
1248
1249 /*
1250 * Recursively check for a completed path to an active or physically connected
1251 * output widget. Returns number of complete paths.
1252 *
1253 * Optionally, can be supplied with a function acting as a stopping condition.
1254 * This function takes the dapm widget currently being examined and the walk
1255 * direction as an arguments, it should return true if widgets from that point
1256 * in the graph onwards should not be added to the widget list.
1257 */
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))1258 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1259 struct list_head *list,
1260 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1261 enum snd_soc_dapm_direction))
1262 {
1263 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1264 is_connected_output_ep, custom_stop_condition);
1265 }
1266
1267 /*
1268 * Recursively check for a completed path to an active or physically connected
1269 * input widget. Returns number of complete paths.
1270 *
1271 * Optionally, can be supplied with a function acting as a stopping condition.
1272 * This function takes the dapm widget currently being examined and the walk
1273 * direction as an arguments, it should return true if the walk should be
1274 * stopped and false otherwise.
1275 */
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))1276 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1277 struct list_head *list,
1278 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1279 enum snd_soc_dapm_direction))
1280 {
1281 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1282 is_connected_input_ep, custom_stop_condition);
1283 }
1284
1285 /**
1286 * snd_soc_dapm_dai_get_connected_widgets - query audio path and it's widgets.
1287 * @dai: the soc DAI.
1288 * @stream: stream direction.
1289 * @list: list of active widgets for this stream.
1290 * @custom_stop_condition: (optional) a function meant to stop the widget graph
1291 * walk based on custom logic.
1292 *
1293 * Queries DAPM graph as to whether a valid audio stream path exists for
1294 * the initial stream specified by name. This takes into account
1295 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1296 *
1297 * Optionally, can be supplied with a function acting as a stopping condition.
1298 * This function takes the dapm widget currently being examined and the walk
1299 * direction as an arguments, it should return true if the walk should be
1300 * stopped and false otherwise.
1301 *
1302 * Returns the number of valid paths or negative error.
1303 */
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))1304 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1305 struct snd_soc_dapm_widget_list **list,
1306 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1307 enum snd_soc_dapm_direction))
1308 {
1309 struct snd_soc_card *card = dai->component->card;
1310 struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(dai, stream);
1311 LIST_HEAD(widgets);
1312 int paths;
1313 int ret;
1314
1315 snd_soc_dapm_mutex_lock(card);
1316
1317 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1318 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_OUT);
1319 paths = is_connected_output_ep(w, &widgets,
1320 custom_stop_condition);
1321 } else {
1322 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_IN);
1323 paths = is_connected_input_ep(w, &widgets,
1324 custom_stop_condition);
1325 }
1326
1327 /* Drop starting point */
1328 list_del(widgets.next);
1329
1330 ret = dapm_widget_list_create(list, &widgets);
1331 if (ret)
1332 paths = ret;
1333
1334 trace_snd_soc_dapm_connected(paths, stream);
1335 snd_soc_dapm_mutex_unlock(card);
1336
1337 return paths;
1338 }
1339 EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_get_connected_widgets);
1340
snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list ** list)1341 void snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list **list)
1342 {
1343 dapm_widget_list_free(list);
1344 }
1345 EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_free_widgets);
1346
1347 /*
1348 * Handler for regulator supply widget.
1349 */
dapm_regulator_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1350 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1351 struct snd_kcontrol *kcontrol, int event)
1352 {
1353 int ret;
1354
1355 soc_dapm_async_complete(w->dapm);
1356
1357 if (SND_SOC_DAPM_EVENT_ON(event)) {
1358 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1359 ret = regulator_allow_bypass(w->regulator, false);
1360 if (ret != 0)
1361 dev_warn(w->dapm->dev,
1362 "ASoC: Failed to unbypass %s: %d\n",
1363 w->name, ret);
1364 }
1365
1366 return regulator_enable(w->regulator);
1367 } else {
1368 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1369 ret = regulator_allow_bypass(w->regulator, true);
1370 if (ret != 0)
1371 dev_warn(w->dapm->dev,
1372 "ASoC: Failed to bypass %s: %d\n",
1373 w->name, ret);
1374 }
1375
1376 return regulator_disable_deferred(w->regulator, w->shift);
1377 }
1378 }
1379 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1380
1381 /*
1382 * Handler for pinctrl widget.
1383 */
dapm_pinctrl_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1384 int dapm_pinctrl_event(struct snd_soc_dapm_widget *w,
1385 struct snd_kcontrol *kcontrol, int event)
1386 {
1387 struct snd_soc_dapm_pinctrl_priv *priv = w->priv;
1388 struct pinctrl *p = w->pinctrl;
1389 struct pinctrl_state *s;
1390
1391 if (!p || !priv)
1392 return -EIO;
1393
1394 if (SND_SOC_DAPM_EVENT_ON(event))
1395 s = pinctrl_lookup_state(p, priv->active_state);
1396 else
1397 s = pinctrl_lookup_state(p, priv->sleep_state);
1398
1399 if (IS_ERR(s))
1400 return PTR_ERR(s);
1401
1402 return pinctrl_select_state(p, s);
1403 }
1404 EXPORT_SYMBOL_GPL(dapm_pinctrl_event);
1405
1406 /*
1407 * Handler for clock supply widget.
1408 */
dapm_clock_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)1409 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1410 struct snd_kcontrol *kcontrol, int event)
1411 {
1412 if (!w->clk)
1413 return -EIO;
1414
1415 soc_dapm_async_complete(w->dapm);
1416
1417 if (SND_SOC_DAPM_EVENT_ON(event)) {
1418 return clk_prepare_enable(w->clk);
1419 } else {
1420 clk_disable_unprepare(w->clk);
1421 return 0;
1422 }
1423
1424 return 0;
1425 }
1426 EXPORT_SYMBOL_GPL(dapm_clock_event);
1427
dapm_widget_power_check(struct snd_soc_dapm_widget * w)1428 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1429 {
1430 if (w->power_checked)
1431 return w->new_power;
1432
1433 if (w->force)
1434 w->new_power = 1;
1435 else
1436 w->new_power = w->power_check(w);
1437
1438 w->power_checked = true;
1439
1440 return w->new_power;
1441 }
1442
1443 /* Generic check to see if a widget should be powered. */
dapm_generic_check_power(struct snd_soc_dapm_widget * w)1444 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1445 {
1446 int in, out;
1447
1448 DAPM_UPDATE_STAT(w, power_checks);
1449
1450 in = is_connected_input_ep(w, NULL, NULL);
1451 out = is_connected_output_ep(w, NULL, NULL);
1452 return out != 0 && in != 0;
1453 }
1454
1455 /* Check to see if a power supply is needed */
dapm_supply_check_power(struct snd_soc_dapm_widget * w)1456 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1457 {
1458 struct snd_soc_dapm_path *path;
1459
1460 DAPM_UPDATE_STAT(w, power_checks);
1461
1462 /* Check if one of our outputs is connected */
1463 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1464 DAPM_UPDATE_STAT(w, neighbour_checks);
1465
1466 if (path->weak)
1467 continue;
1468
1469 if (path->connected &&
1470 !path->connected(path->source, path->sink))
1471 continue;
1472
1473 if (dapm_widget_power_check(path->sink))
1474 return 1;
1475 }
1476
1477 return 0;
1478 }
1479
dapm_always_on_check_power(struct snd_soc_dapm_widget * w)1480 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1481 {
1482 return w->connected;
1483 }
1484
dapm_seq_compare(struct snd_soc_dapm_widget * a,struct snd_soc_dapm_widget * b,bool power_up)1485 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1486 struct snd_soc_dapm_widget *b,
1487 bool power_up)
1488 {
1489 int *sort;
1490
1491 BUILD_BUG_ON(ARRAY_SIZE(dapm_up_seq) != SND_SOC_DAPM_TYPE_COUNT);
1492 BUILD_BUG_ON(ARRAY_SIZE(dapm_down_seq) != SND_SOC_DAPM_TYPE_COUNT);
1493
1494 if (power_up)
1495 sort = dapm_up_seq;
1496 else
1497 sort = dapm_down_seq;
1498
1499 WARN_ONCE(sort[a->id] == 0, "offset a->id %d not initialized\n", a->id);
1500 WARN_ONCE(sort[b->id] == 0, "offset b->id %d not initialized\n", b->id);
1501
1502 if (sort[a->id] != sort[b->id])
1503 return sort[a->id] - sort[b->id];
1504 if (a->subseq != b->subseq) {
1505 if (power_up)
1506 return a->subseq - b->subseq;
1507 else
1508 return b->subseq - a->subseq;
1509 }
1510 if (a->reg != b->reg)
1511 return a->reg - b->reg;
1512 if (a->dapm != b->dapm)
1513 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1514
1515 return 0;
1516 }
1517
1518 /* 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)1519 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1520 struct list_head *list,
1521 bool power_up)
1522 {
1523 struct snd_soc_dapm_widget *w;
1524
1525 list_for_each_entry(w, list, power_list)
1526 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1527 list_add_tail(&new_widget->power_list, &w->power_list);
1528 return;
1529 }
1530
1531 list_add_tail(&new_widget->power_list, list);
1532 }
1533
dapm_seq_check_event(struct snd_soc_card * card,struct snd_soc_dapm_widget * w,int event)1534 static void dapm_seq_check_event(struct snd_soc_card *card,
1535 struct snd_soc_dapm_widget *w, int event)
1536 {
1537 const char *ev_name;
1538 int power;
1539
1540 switch (event) {
1541 case SND_SOC_DAPM_PRE_PMU:
1542 ev_name = "PRE_PMU";
1543 power = 1;
1544 break;
1545 case SND_SOC_DAPM_POST_PMU:
1546 ev_name = "POST_PMU";
1547 power = 1;
1548 break;
1549 case SND_SOC_DAPM_PRE_PMD:
1550 ev_name = "PRE_PMD";
1551 power = 0;
1552 break;
1553 case SND_SOC_DAPM_POST_PMD:
1554 ev_name = "POST_PMD";
1555 power = 0;
1556 break;
1557 case SND_SOC_DAPM_WILL_PMU:
1558 ev_name = "WILL_PMU";
1559 power = 1;
1560 break;
1561 case SND_SOC_DAPM_WILL_PMD:
1562 ev_name = "WILL_PMD";
1563 power = 0;
1564 break;
1565 default:
1566 WARN(1, "Unknown event %d\n", event);
1567 return;
1568 }
1569
1570 if (w->new_power != power)
1571 return;
1572
1573 if (w->event && (w->event_flags & event)) {
1574 int ret;
1575
1576 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1577 w->name, ev_name);
1578 soc_dapm_async_complete(w->dapm);
1579 trace_snd_soc_dapm_widget_event_start(w, event);
1580 ret = w->event(w, NULL, event);
1581 trace_snd_soc_dapm_widget_event_done(w, event);
1582 if (ret < 0)
1583 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1584 ev_name, w->name, ret);
1585 }
1586 }
1587
1588 /* Apply the coalesced changes from a DAPM sequence */
dapm_seq_run_coalesced(struct snd_soc_card * card,struct list_head * pending)1589 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1590 struct list_head *pending)
1591 {
1592 struct snd_soc_dapm_context *dapm;
1593 struct snd_soc_dapm_widget *w;
1594 int reg;
1595 unsigned int value = 0;
1596 unsigned int mask = 0;
1597
1598 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1599 reg = w->reg;
1600 dapm = w->dapm;
1601
1602 list_for_each_entry(w, pending, power_list) {
1603 WARN_ON(reg != w->reg || dapm != w->dapm);
1604 w->power = w->new_power;
1605
1606 mask |= w->mask << w->shift;
1607 if (w->power)
1608 value |= w->on_val << w->shift;
1609 else
1610 value |= w->off_val << w->shift;
1611
1612 pop_dbg(dapm->dev, card->pop_time,
1613 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1614 w->name, reg, value, mask);
1615
1616 /* Check for events */
1617 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1618 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1619 }
1620
1621 if (reg >= 0) {
1622 /* Any widget will do, they should all be updating the
1623 * same register.
1624 */
1625
1626 pop_dbg(dapm->dev, card->pop_time,
1627 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1628 value, mask, reg, card->pop_time);
1629 pop_wait(card->pop_time);
1630 soc_dapm_update_bits(dapm, reg, mask, value);
1631 }
1632
1633 list_for_each_entry(w, pending, power_list) {
1634 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1635 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1636 }
1637 }
1638
1639 /* Apply a DAPM power sequence.
1640 *
1641 * We walk over a pre-sorted list of widgets to apply power to. In
1642 * order to minimise the number of writes to the device required
1643 * multiple widgets will be updated in a single write where possible.
1644 * Currently anything that requires more than a single write is not
1645 * handled.
1646 */
dapm_seq_run(struct snd_soc_card * card,struct list_head * list,int event,bool power_up)1647 static void dapm_seq_run(struct snd_soc_card *card,
1648 struct list_head *list, int event, bool power_up)
1649 {
1650 struct snd_soc_dapm_widget *w, *n;
1651 struct snd_soc_dapm_context *d;
1652 LIST_HEAD(pending);
1653 int cur_sort = -1;
1654 int cur_subseq = -1;
1655 int cur_reg = SND_SOC_NOPM;
1656 struct snd_soc_dapm_context *cur_dapm = NULL;
1657 int i;
1658 int *sort;
1659
1660 if (power_up)
1661 sort = dapm_up_seq;
1662 else
1663 sort = dapm_down_seq;
1664
1665 list_for_each_entry_safe(w, n, list, power_list) {
1666 int ret = 0;
1667
1668 /* Do we need to apply any queued changes? */
1669 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1670 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1671 if (!list_empty(&pending))
1672 dapm_seq_run_coalesced(card, &pending);
1673
1674 if (cur_dapm && cur_dapm->component) {
1675 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1676 if (sort[i] == cur_sort)
1677 snd_soc_component_seq_notifier(
1678 cur_dapm->component,
1679 i, cur_subseq);
1680 }
1681
1682 if (cur_dapm && w->dapm != cur_dapm)
1683 soc_dapm_async_complete(cur_dapm);
1684
1685 INIT_LIST_HEAD(&pending);
1686 cur_sort = -1;
1687 cur_subseq = INT_MIN;
1688 cur_reg = SND_SOC_NOPM;
1689 cur_dapm = NULL;
1690 }
1691
1692 switch (w->id) {
1693 case snd_soc_dapm_pre:
1694 if (!w->event)
1695 continue;
1696
1697 if (event == SND_SOC_DAPM_STREAM_START)
1698 ret = w->event(w,
1699 NULL, SND_SOC_DAPM_PRE_PMU);
1700 else if (event == SND_SOC_DAPM_STREAM_STOP)
1701 ret = w->event(w,
1702 NULL, SND_SOC_DAPM_PRE_PMD);
1703 break;
1704
1705 case snd_soc_dapm_post:
1706 if (!w->event)
1707 continue;
1708
1709 if (event == SND_SOC_DAPM_STREAM_START)
1710 ret = w->event(w,
1711 NULL, SND_SOC_DAPM_POST_PMU);
1712 else if (event == SND_SOC_DAPM_STREAM_STOP)
1713 ret = w->event(w,
1714 NULL, SND_SOC_DAPM_POST_PMD);
1715 break;
1716
1717 default:
1718 /* Queue it up for application */
1719 cur_sort = sort[w->id];
1720 cur_subseq = w->subseq;
1721 cur_reg = w->reg;
1722 cur_dapm = w->dapm;
1723 list_move(&w->power_list, &pending);
1724 break;
1725 }
1726
1727 if (ret < 0)
1728 dev_err(w->dapm->dev,
1729 "ASoC: Failed to apply widget power: %d\n", ret);
1730 }
1731
1732 if (!list_empty(&pending))
1733 dapm_seq_run_coalesced(card, &pending);
1734
1735 if (cur_dapm && cur_dapm->component) {
1736 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1737 if (sort[i] == cur_sort)
1738 snd_soc_component_seq_notifier(
1739 cur_dapm->component,
1740 i, cur_subseq);
1741 }
1742
1743 for_each_card_dapms(card, d)
1744 soc_dapm_async_complete(d);
1745 }
1746
dapm_widget_update(struct snd_soc_card * card)1747 static void dapm_widget_update(struct snd_soc_card *card)
1748 {
1749 struct snd_soc_dapm_update *update = card->update;
1750 struct snd_soc_dapm_widget_list *wlist;
1751 struct snd_soc_dapm_widget *w = NULL;
1752 unsigned int wi;
1753 int ret;
1754
1755 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1756 return;
1757
1758 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1759
1760 for_each_dapm_widgets(wlist, wi, w) {
1761 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1762 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1763 if (ret != 0)
1764 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1765 w->name, ret);
1766 }
1767 }
1768
1769 if (!w)
1770 return;
1771
1772 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1773 update->val);
1774 if (ret < 0)
1775 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1776 w->name, ret);
1777
1778 if (update->has_second_set) {
1779 ret = soc_dapm_update_bits(w->dapm, update->reg2,
1780 update->mask2, update->val2);
1781 if (ret < 0)
1782 dev_err(w->dapm->dev,
1783 "ASoC: %s DAPM update failed: %d\n",
1784 w->name, ret);
1785 }
1786
1787 for_each_dapm_widgets(wlist, wi, w) {
1788 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1789 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1790 if (ret != 0)
1791 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1792 w->name, ret);
1793 }
1794 }
1795 }
1796
1797 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1798 * they're changing state.
1799 */
dapm_pre_sequence_async(void * data,async_cookie_t cookie)1800 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1801 {
1802 struct snd_soc_dapm_context *d = data;
1803 int ret;
1804
1805 /* If we're off and we're not supposed to go into STANDBY */
1806 if (d->bias_level == SND_SOC_BIAS_OFF &&
1807 d->target_bias_level != SND_SOC_BIAS_OFF) {
1808 if (d->dev && cookie)
1809 pm_runtime_get_sync(d->dev);
1810
1811 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1812 if (ret != 0)
1813 dev_err(d->dev,
1814 "ASoC: Failed to turn on bias: %d\n", ret);
1815 }
1816
1817 /* Prepare for a transition to ON or away from ON */
1818 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1819 d->bias_level != SND_SOC_BIAS_ON) ||
1820 (d->target_bias_level != SND_SOC_BIAS_ON &&
1821 d->bias_level == SND_SOC_BIAS_ON)) {
1822 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1823 if (ret != 0)
1824 dev_err(d->dev,
1825 "ASoC: Failed to prepare bias: %d\n", ret);
1826 }
1827 }
1828
1829 /* Async callback run prior to DAPM sequences - brings to their final
1830 * state.
1831 */
dapm_post_sequence_async(void * data,async_cookie_t cookie)1832 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1833 {
1834 struct snd_soc_dapm_context *d = data;
1835 int ret;
1836
1837 /* If we just powered the last thing off drop to standby bias */
1838 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1839 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1840 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1841 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1842 if (ret != 0)
1843 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1844 ret);
1845 }
1846
1847 /* If we're in standby and can support bias off then do that */
1848 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1849 d->target_bias_level == SND_SOC_BIAS_OFF) {
1850 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1851 if (ret != 0)
1852 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1853 ret);
1854
1855 if (d->dev && cookie)
1856 pm_runtime_put(d->dev);
1857 }
1858
1859 /* If we just powered up then move to active bias */
1860 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1861 d->target_bias_level == SND_SOC_BIAS_ON) {
1862 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1863 if (ret != 0)
1864 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1865 ret);
1866 }
1867 }
1868
dapm_widget_set_peer_power(struct snd_soc_dapm_widget * peer,bool power,bool connect)1869 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1870 bool power, bool connect)
1871 {
1872 /* If a connection is being made or broken then that update
1873 * will have marked the peer dirty, otherwise the widgets are
1874 * not connected and this update has no impact. */
1875 if (!connect)
1876 return;
1877
1878 /* If the peer is already in the state we're moving to then we
1879 * won't have an impact on it. */
1880 if (power != peer->power)
1881 dapm_mark_dirty(peer, "peer state change");
1882 }
1883
dapm_power_one_widget(struct snd_soc_dapm_widget * w,struct list_head * up_list,struct list_head * down_list)1884 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1885 struct list_head *up_list,
1886 struct list_head *down_list)
1887 {
1888 struct snd_soc_dapm_path *path;
1889 int power;
1890
1891 switch (w->id) {
1892 case snd_soc_dapm_pre:
1893 power = 0;
1894 goto end;
1895 case snd_soc_dapm_post:
1896 power = 1;
1897 goto end;
1898 default:
1899 break;
1900 }
1901
1902 power = dapm_widget_power_check(w);
1903
1904 if (w->power == power)
1905 return;
1906
1907 trace_snd_soc_dapm_widget_power(w, power);
1908
1909 /*
1910 * If we changed our power state perhaps our neigbours
1911 * changed also.
1912 */
1913 snd_soc_dapm_widget_for_each_source_path(w, path)
1914 dapm_widget_set_peer_power(path->source, power, path->connect);
1915
1916 /*
1917 * Supplies can't affect their outputs, only their inputs
1918 */
1919 if (!w->is_supply)
1920 snd_soc_dapm_widget_for_each_sink_path(w, path)
1921 dapm_widget_set_peer_power(path->sink, power, path->connect);
1922
1923 end:
1924 if (power)
1925 dapm_seq_insert(w, up_list, true);
1926 else
1927 dapm_seq_insert(w, down_list, false);
1928 }
1929
dapm_idle_bias_off(struct snd_soc_dapm_context * dapm)1930 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1931 {
1932 if (dapm->idle_bias_off)
1933 return true;
1934
1935 switch (snd_power_get_state(dapm->card->snd_card)) {
1936 case SNDRV_CTL_POWER_D3hot:
1937 case SNDRV_CTL_POWER_D3cold:
1938 return dapm->suspend_bias_off;
1939 default:
1940 break;
1941 }
1942
1943 return false;
1944 }
1945
1946 /*
1947 * Scan each dapm widget for complete audio path.
1948 * A complete path is a route that has valid endpoints i.e.:-
1949 *
1950 * o DAC to output pin.
1951 * o Input pin to ADC.
1952 * o Input pin to Output pin (bypass, sidetone)
1953 * o DAC to ADC (loopback).
1954 */
dapm_power_widgets(struct snd_soc_card * card,int event)1955 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1956 {
1957 struct snd_soc_dapm_widget *w;
1958 struct snd_soc_dapm_context *d;
1959 LIST_HEAD(up_list);
1960 LIST_HEAD(down_list);
1961 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1962 enum snd_soc_bias_level bias;
1963 int ret;
1964
1965 snd_soc_dapm_mutex_assert_held(card);
1966
1967 trace_snd_soc_dapm_start(card, event);
1968
1969 for_each_card_dapms(card, d) {
1970 if (dapm_idle_bias_off(d))
1971 d->target_bias_level = SND_SOC_BIAS_OFF;
1972 else
1973 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1974 }
1975
1976 dapm_reset(card);
1977
1978 /* Check which widgets we need to power and store them in
1979 * lists indicating if they should be powered up or down. We
1980 * only check widgets that have been flagged as dirty but note
1981 * that new widgets may be added to the dirty list while we
1982 * iterate.
1983 */
1984 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1985 dapm_power_one_widget(w, &up_list, &down_list);
1986 }
1987
1988 for_each_card_widgets(card, w) {
1989 switch (w->id) {
1990 case snd_soc_dapm_pre:
1991 case snd_soc_dapm_post:
1992 /* These widgets always need to be powered */
1993 break;
1994 default:
1995 list_del_init(&w->dirty);
1996 break;
1997 }
1998
1999 if (w->new_power) {
2000 d = w->dapm;
2001
2002 /* Supplies and micbiases only bring the
2003 * context up to STANDBY as unless something
2004 * else is active and passing audio they
2005 * generally don't require full power. Signal
2006 * generators are virtual pins and have no
2007 * power impact themselves.
2008 */
2009 switch (w->id) {
2010 case snd_soc_dapm_siggen:
2011 case snd_soc_dapm_vmid:
2012 break;
2013 case snd_soc_dapm_supply:
2014 case snd_soc_dapm_regulator_supply:
2015 case snd_soc_dapm_pinctrl:
2016 case snd_soc_dapm_clock_supply:
2017 case snd_soc_dapm_micbias:
2018 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
2019 d->target_bias_level = SND_SOC_BIAS_STANDBY;
2020 break;
2021 default:
2022 d->target_bias_level = SND_SOC_BIAS_ON;
2023 break;
2024 }
2025 }
2026
2027 }
2028
2029 /* Force all contexts in the card to the same bias state if
2030 * they're not ground referenced.
2031 */
2032 bias = SND_SOC_BIAS_OFF;
2033 for_each_card_dapms(card, d)
2034 if (d->target_bias_level > bias)
2035 bias = d->target_bias_level;
2036 for_each_card_dapms(card, d)
2037 if (!dapm_idle_bias_off(d))
2038 d->target_bias_level = bias;
2039
2040 trace_snd_soc_dapm_walk_done(card);
2041
2042 /* Run card bias changes at first */
2043 dapm_pre_sequence_async(&card->dapm, 0);
2044 /* Run other bias changes in parallel */
2045 for_each_card_dapms(card, d) {
2046 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2047 async_schedule_domain(dapm_pre_sequence_async, d,
2048 &async_domain);
2049 }
2050 async_synchronize_full_domain(&async_domain);
2051
2052 list_for_each_entry(w, &down_list, power_list) {
2053 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
2054 }
2055
2056 list_for_each_entry(w, &up_list, power_list) {
2057 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
2058 }
2059
2060 /* Power down widgets first; try to avoid amplifying pops. */
2061 dapm_seq_run(card, &down_list, event, false);
2062
2063 dapm_widget_update(card);
2064
2065 /* Now power up. */
2066 dapm_seq_run(card, &up_list, event, true);
2067
2068 /* Run all the bias changes in parallel */
2069 for_each_card_dapms(card, d) {
2070 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2071 async_schedule_domain(dapm_post_sequence_async, d,
2072 &async_domain);
2073 }
2074 async_synchronize_full_domain(&async_domain);
2075 /* Run card bias changes at last */
2076 dapm_post_sequence_async(&card->dapm, 0);
2077
2078 /* do we need to notify any clients that DAPM event is complete */
2079 for_each_card_dapms(card, d) {
2080 if (!d->component)
2081 continue;
2082
2083 ret = snd_soc_component_stream_event(d->component, event);
2084 if (ret < 0)
2085 return ret;
2086 }
2087
2088 pop_dbg(card->dev, card->pop_time,
2089 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
2090 pop_wait(card->pop_time);
2091
2092 trace_snd_soc_dapm_done(card, event);
2093
2094 return 0;
2095 }
2096
2097 #ifdef CONFIG_DEBUG_FS
2098
2099 static const char * const snd_soc_dapm_type_name[] = {
2100 [snd_soc_dapm_input] = "input",
2101 [snd_soc_dapm_output] = "output",
2102 [snd_soc_dapm_mux] = "mux",
2103 [snd_soc_dapm_demux] = "demux",
2104 [snd_soc_dapm_mixer] = "mixer",
2105 [snd_soc_dapm_mixer_named_ctl] = "mixer_named_ctl",
2106 [snd_soc_dapm_pga] = "pga",
2107 [snd_soc_dapm_out_drv] = "out_drv",
2108 [snd_soc_dapm_adc] = "adc",
2109 [snd_soc_dapm_dac] = "dac",
2110 [snd_soc_dapm_micbias] = "micbias",
2111 [snd_soc_dapm_mic] = "mic",
2112 [snd_soc_dapm_hp] = "hp",
2113 [snd_soc_dapm_spk] = "spk",
2114 [snd_soc_dapm_line] = "line",
2115 [snd_soc_dapm_switch] = "switch",
2116 [snd_soc_dapm_vmid] = "vmid",
2117 [snd_soc_dapm_pre] = "pre",
2118 [snd_soc_dapm_post] = "post",
2119 [snd_soc_dapm_supply] = "supply",
2120 [snd_soc_dapm_pinctrl] = "pinctrl",
2121 [snd_soc_dapm_regulator_supply] = "regulator_supply",
2122 [snd_soc_dapm_clock_supply] = "clock_supply",
2123 [snd_soc_dapm_aif_in] = "aif_in",
2124 [snd_soc_dapm_aif_out] = "aif_out",
2125 [snd_soc_dapm_siggen] = "siggen",
2126 [snd_soc_dapm_sink] = "sink",
2127 [snd_soc_dapm_dai_in] = "dai_in",
2128 [snd_soc_dapm_dai_out] = "dai_out",
2129 [snd_soc_dapm_dai_link] = "dai_link",
2130 [snd_soc_dapm_kcontrol] = "kcontrol",
2131 [snd_soc_dapm_buffer] = "buffer",
2132 [snd_soc_dapm_scheduler] = "scheduler",
2133 [snd_soc_dapm_effect] = "effect",
2134 [snd_soc_dapm_src] = "src",
2135 [snd_soc_dapm_asrc] = "asrc",
2136 [snd_soc_dapm_encoder] = "encoder",
2137 [snd_soc_dapm_decoder] = "decoder",
2138 };
2139
dapm_widget_power_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2140 static ssize_t dapm_widget_power_read_file(struct file *file,
2141 char __user *user_buf,
2142 size_t count, loff_t *ppos)
2143 {
2144 struct snd_soc_dapm_widget *w = file->private_data;
2145 enum snd_soc_dapm_direction dir, rdir;
2146 char *buf;
2147 int in, out;
2148 ssize_t ret;
2149 struct snd_soc_dapm_path *p = NULL;
2150 const char *c_name;
2151
2152 BUILD_BUG_ON(ARRAY_SIZE(snd_soc_dapm_type_name) != SND_SOC_DAPM_TYPE_COUNT);
2153
2154 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
2155 if (!buf)
2156 return -ENOMEM;
2157
2158 snd_soc_dapm_mutex_lock_root(w->dapm);
2159
2160 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
2161 if (w->is_supply) {
2162 in = 0;
2163 out = 0;
2164 } else {
2165 in = is_connected_input_ep(w, NULL, NULL);
2166 out = is_connected_output_ep(w, NULL, NULL);
2167 }
2168
2169 ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
2170 w->name, w->power ? "On" : "Off",
2171 w->force ? " (forced)" : "", in, out);
2172
2173 if (w->reg >= 0)
2174 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2175 " - R%d(0x%x) mask 0x%x",
2176 w->reg, w->reg, w->mask << w->shift);
2177
2178 ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
2179
2180 if (w->sname)
2181 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
2182 w->sname,
2183 w->active ? "active" : "inactive");
2184
2185 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " widget-type %s\n",
2186 snd_soc_dapm_type_name[w->id]);
2187
2188 snd_soc_dapm_for_each_direction(dir) {
2189 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
2190 snd_soc_dapm_widget_for_each_path(w, dir, p) {
2191 if (p->connected && !p->connected(p->source, p->sink))
2192 continue;
2193
2194 if (!p->connect)
2195 continue;
2196
2197 c_name = p->node[rdir]->dapm->component ?
2198 p->node[rdir]->dapm->component->name : NULL;
2199 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2200 " %s \"%s\" \"%s\" \"%s\"\n",
2201 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
2202 p->name ? p->name : "static",
2203 p->node[rdir]->name, c_name);
2204 }
2205 }
2206
2207 snd_soc_dapm_mutex_unlock(w->dapm);
2208
2209 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2210
2211 kfree(buf);
2212 return ret;
2213 }
2214
2215 static const struct file_operations dapm_widget_power_fops = {
2216 .open = simple_open,
2217 .read = dapm_widget_power_read_file,
2218 .llseek = default_llseek,
2219 };
2220
dapm_bias_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2221 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2222 size_t count, loff_t *ppos)
2223 {
2224 struct snd_soc_dapm_context *dapm = file->private_data;
2225 char *level;
2226
2227 switch (dapm->bias_level) {
2228 case SND_SOC_BIAS_ON:
2229 level = "On\n";
2230 break;
2231 case SND_SOC_BIAS_PREPARE:
2232 level = "Prepare\n";
2233 break;
2234 case SND_SOC_BIAS_STANDBY:
2235 level = "Standby\n";
2236 break;
2237 case SND_SOC_BIAS_OFF:
2238 level = "Off\n";
2239 break;
2240 default:
2241 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2242 level = "Unknown\n";
2243 break;
2244 }
2245
2246 return simple_read_from_buffer(user_buf, count, ppos, level,
2247 strlen(level));
2248 }
2249
2250 static const struct file_operations dapm_bias_fops = {
2251 .open = simple_open,
2252 .read = dapm_bias_read_file,
2253 .llseek = default_llseek,
2254 };
2255
snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context * dapm,struct dentry * parent)2256 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2257 struct dentry *parent)
2258 {
2259 if (IS_ERR_OR_NULL(parent))
2260 return;
2261
2262 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2263
2264 debugfs_create_file("bias_level", 0444, dapm->debugfs_dapm, dapm,
2265 &dapm_bias_fops);
2266 }
2267
dapm_debugfs_add_widget(struct snd_soc_dapm_widget * w)2268 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2269 {
2270 struct snd_soc_dapm_context *dapm = w->dapm;
2271
2272 if (!dapm->debugfs_dapm || !w->name)
2273 return;
2274
2275 debugfs_create_file(w->name, 0444, dapm->debugfs_dapm, w,
2276 &dapm_widget_power_fops);
2277 }
2278
dapm_debugfs_free_widget(struct snd_soc_dapm_widget * w)2279 static void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2280 {
2281 struct snd_soc_dapm_context *dapm = w->dapm;
2282
2283 if (!dapm->debugfs_dapm || !w->name)
2284 return;
2285
2286 debugfs_lookup_and_remove(w->name, dapm->debugfs_dapm);
2287 }
2288
dapm_debugfs_cleanup(struct snd_soc_dapm_context * dapm)2289 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2290 {
2291 debugfs_remove_recursive(dapm->debugfs_dapm);
2292 dapm->debugfs_dapm = NULL;
2293 }
2294
2295 #else
snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context * dapm,struct dentry * parent)2296 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2297 struct dentry *parent)
2298 {
2299 }
2300
dapm_debugfs_add_widget(struct snd_soc_dapm_widget * w)2301 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2302 {
2303 }
2304
dapm_debugfs_free_widget(struct snd_soc_dapm_widget * w)2305 static inline void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2306 {
2307 }
2308
dapm_debugfs_cleanup(struct snd_soc_dapm_context * dapm)2309 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2310 {
2311 }
2312
2313 #endif
2314
2315 /*
2316 * soc_dapm_connect_path() - Connects or disconnects a path
2317 * @path: The path to update
2318 * @connect: The new connect state of the path. True if the path is connected,
2319 * false if it is disconnected.
2320 * @reason: The reason why the path changed (for debugging only)
2321 */
soc_dapm_connect_path(struct snd_soc_dapm_path * path,bool connect,const char * reason)2322 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2323 bool connect, const char *reason)
2324 {
2325 if (path->connect == connect)
2326 return;
2327
2328 path->connect = connect;
2329 dapm_mark_dirty(path->source, reason);
2330 dapm_mark_dirty(path->sink, reason);
2331 dapm_path_invalidate(path);
2332 }
2333
2334 /* 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)2335 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2336 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2337 {
2338 struct snd_soc_dapm_path *path;
2339 int found = 0;
2340 bool connect;
2341
2342 snd_soc_dapm_mutex_assert_held(card);
2343
2344 /* find dapm widget path assoc with kcontrol */
2345 dapm_kcontrol_for_each_path(path, kcontrol) {
2346 found = 1;
2347 /* we now need to match the string in the enum to the path */
2348 if (e && !(strcmp(path->name, e->texts[mux])))
2349 connect = true;
2350 else
2351 connect = false;
2352
2353 soc_dapm_connect_path(path, connect, "mux update");
2354 }
2355
2356 if (found)
2357 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2358
2359 return found;
2360 }
2361
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)2362 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2363 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2364 struct snd_soc_dapm_update *update)
2365 {
2366 struct snd_soc_card *card = dapm->card;
2367 int ret;
2368
2369 snd_soc_dapm_mutex_lock(card);
2370 card->update = update;
2371 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2372 card->update = NULL;
2373 snd_soc_dapm_mutex_unlock(card);
2374 if (ret > 0)
2375 snd_soc_dpcm_runtime_update(card);
2376 return ret;
2377 }
2378 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2379
2380 /* 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)2381 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2382 struct snd_kcontrol *kcontrol,
2383 int connect, int rconnect)
2384 {
2385 struct snd_soc_dapm_path *path;
2386 int found = 0;
2387
2388 snd_soc_dapm_mutex_assert_held(card);
2389
2390 /* find dapm widget path assoc with kcontrol */
2391 dapm_kcontrol_for_each_path(path, kcontrol) {
2392 /*
2393 * Ideally this function should support any number of
2394 * paths and channels. But since kcontrols only come
2395 * in mono and stereo variants, we are limited to 2
2396 * channels.
2397 *
2398 * The following code assumes for stereo controls the
2399 * first path (when 'found == 0') is the left channel,
2400 * and all remaining paths (when 'found == 1') are the
2401 * right channel.
2402 *
2403 * A stereo control is signified by a valid 'rconnect'
2404 * value, either 0 for unconnected, or >= 0 for connected.
2405 * This is chosen instead of using snd_soc_volsw_is_stereo,
2406 * so that the behavior of snd_soc_dapm_mixer_update_power
2407 * doesn't change even when the kcontrol passed in is
2408 * stereo.
2409 *
2410 * It passes 'connect' as the path connect status for
2411 * the left channel, and 'rconnect' for the right
2412 * channel.
2413 */
2414 if (found && rconnect >= 0)
2415 soc_dapm_connect_path(path, rconnect, "mixer update");
2416 else
2417 soc_dapm_connect_path(path, connect, "mixer update");
2418 found = 1;
2419 }
2420
2421 if (found)
2422 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2423
2424 return found;
2425 }
2426
snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context * dapm,struct snd_kcontrol * kcontrol,int connect,struct snd_soc_dapm_update * update)2427 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2428 struct snd_kcontrol *kcontrol, int connect,
2429 struct snd_soc_dapm_update *update)
2430 {
2431 struct snd_soc_card *card = dapm->card;
2432 int ret;
2433
2434 snd_soc_dapm_mutex_lock(card);
2435 card->update = update;
2436 ret = soc_dapm_mixer_update_power(card, kcontrol, connect, -1);
2437 card->update = NULL;
2438 snd_soc_dapm_mutex_unlock(card);
2439 if (ret > 0)
2440 snd_soc_dpcm_runtime_update(card);
2441 return ret;
2442 }
2443 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2444
dapm_widget_show_component(struct snd_soc_component * cmpnt,char * buf,int count)2445 static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2446 char *buf, int count)
2447 {
2448 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2449 struct snd_soc_dapm_widget *w;
2450 char *state = "not set";
2451
2452 /* card won't be set for the dummy component, as a spot fix
2453 * we're checking for that case specifically here but in future
2454 * we will ensure that the dummy component looks like others.
2455 */
2456 if (!cmpnt->card)
2457 return 0;
2458
2459 for_each_card_widgets(cmpnt->card, w) {
2460 if (w->dapm != dapm)
2461 continue;
2462
2463 /* only display widgets that burn power */
2464 switch (w->id) {
2465 case snd_soc_dapm_hp:
2466 case snd_soc_dapm_mic:
2467 case snd_soc_dapm_spk:
2468 case snd_soc_dapm_line:
2469 case snd_soc_dapm_micbias:
2470 case snd_soc_dapm_dac:
2471 case snd_soc_dapm_adc:
2472 case snd_soc_dapm_pga:
2473 case snd_soc_dapm_effect:
2474 case snd_soc_dapm_out_drv:
2475 case snd_soc_dapm_mixer:
2476 case snd_soc_dapm_mixer_named_ctl:
2477 case snd_soc_dapm_supply:
2478 case snd_soc_dapm_regulator_supply:
2479 case snd_soc_dapm_pinctrl:
2480 case snd_soc_dapm_clock_supply:
2481 if (w->name)
2482 count += sysfs_emit_at(buf, count, "%s: %s\n",
2483 w->name, w->power ? "On":"Off");
2484 break;
2485 default:
2486 break;
2487 }
2488 }
2489
2490 switch (snd_soc_dapm_get_bias_level(dapm)) {
2491 case SND_SOC_BIAS_ON:
2492 state = "On";
2493 break;
2494 case SND_SOC_BIAS_PREPARE:
2495 state = "Prepare";
2496 break;
2497 case SND_SOC_BIAS_STANDBY:
2498 state = "Standby";
2499 break;
2500 case SND_SOC_BIAS_OFF:
2501 state = "Off";
2502 break;
2503 }
2504 count += sysfs_emit_at(buf, count, "PM State: %s\n", state);
2505
2506 return count;
2507 }
2508
2509 /* show dapm widget status in sys fs */
dapm_widget_show(struct device * dev,struct device_attribute * attr,char * buf)2510 static ssize_t dapm_widget_show(struct device *dev,
2511 struct device_attribute *attr, char *buf)
2512 {
2513 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2514 struct snd_soc_dai *codec_dai;
2515 int i, count = 0;
2516
2517 snd_soc_dapm_mutex_lock_root(rtd->card);
2518
2519 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2520 struct snd_soc_component *cmpnt = codec_dai->component;
2521
2522 count = dapm_widget_show_component(cmpnt, buf, count);
2523 }
2524
2525 snd_soc_dapm_mutex_unlock(rtd->card);
2526
2527 return count;
2528 }
2529
2530 static DEVICE_ATTR_RO(dapm_widget);
2531
2532 struct attribute *soc_dapm_dev_attrs[] = {
2533 &dev_attr_dapm_widget.attr,
2534 NULL
2535 };
2536
dapm_free_path(struct snd_soc_dapm_path * path)2537 static void dapm_free_path(struct snd_soc_dapm_path *path)
2538 {
2539 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2540 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2541 list_del(&path->list_kcontrol);
2542 list_del(&path->list);
2543 kfree(path);
2544 }
2545
2546 /**
2547 * snd_soc_dapm_free_widget - Free specified widget
2548 * @w: widget to free
2549 *
2550 * Removes widget from all paths and frees memory occupied by it.
2551 */
snd_soc_dapm_free_widget(struct snd_soc_dapm_widget * w)2552 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2553 {
2554 struct snd_soc_dapm_path *p, *next_p;
2555 enum snd_soc_dapm_direction dir;
2556
2557 if (!w)
2558 return;
2559
2560 list_del(&w->list);
2561 list_del(&w->dirty);
2562 /*
2563 * remove source and sink paths associated to this widget.
2564 * While removing the path, remove reference to it from both
2565 * source and sink widgets so that path is removed only once.
2566 */
2567 snd_soc_dapm_for_each_direction(dir) {
2568 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2569 dapm_free_path(p);
2570 }
2571
2572 dapm_debugfs_free_widget(w);
2573
2574 kfree(w->kcontrols);
2575 kfree_const(w->name);
2576 kfree_const(w->sname);
2577 kfree(w);
2578 }
2579 EXPORT_SYMBOL_GPL(snd_soc_dapm_free_widget);
2580
2581 /* free all dapm widgets and resources */
dapm_free_widgets(struct snd_soc_dapm_context * dapm)2582 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2583 {
2584 struct snd_soc_dapm_widget *w, *next_w;
2585
2586 for_each_card_widgets_safe(dapm->card, w, next_w) {
2587 if (w->dapm != dapm)
2588 continue;
2589 snd_soc_dapm_free_widget(w);
2590 }
2591
2592 dapm->wcache_sink = NULL;
2593 dapm->wcache_source = NULL;
2594 }
2595
dapm_find_widget(struct snd_soc_dapm_context * dapm,const char * pin,bool search_other_contexts)2596 static struct snd_soc_dapm_widget *dapm_find_widget(
2597 struct snd_soc_dapm_context *dapm, const char *pin,
2598 bool search_other_contexts)
2599 {
2600 struct snd_soc_dapm_widget *w;
2601 struct snd_soc_dapm_widget *fallback = NULL;
2602 char prefixed_pin[80];
2603 const char *pin_name;
2604 const char *prefix = soc_dapm_prefix(dapm);
2605
2606 if (prefix) {
2607 snprintf(prefixed_pin, sizeof(prefixed_pin), "%s %s",
2608 prefix, pin);
2609 pin_name = prefixed_pin;
2610 } else {
2611 pin_name = pin;
2612 }
2613
2614 for_each_card_widgets(dapm->card, w) {
2615 if (!strcmp(w->name, pin_name)) {
2616 if (w->dapm == dapm)
2617 return w;
2618 else
2619 fallback = w;
2620 }
2621 }
2622
2623 if (search_other_contexts)
2624 return fallback;
2625
2626 return NULL;
2627 }
2628
2629 /*
2630 * set the DAPM pin status:
2631 * returns 1 when the value has been updated, 0 when unchanged, or a negative
2632 * error code; called from kcontrol put callback
2633 */
__snd_soc_dapm_set_pin(struct snd_soc_dapm_context * dapm,const char * pin,int status)2634 static int __snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2635 const char *pin, int status)
2636 {
2637 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2638 int ret = 0;
2639
2640 dapm_assert_locked(dapm);
2641
2642 if (!w) {
2643 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2644 return -EINVAL;
2645 }
2646
2647 if (w->connected != status) {
2648 dapm_mark_dirty(w, "pin configuration");
2649 dapm_widget_invalidate_input_paths(w);
2650 dapm_widget_invalidate_output_paths(w);
2651 ret = 1;
2652 }
2653
2654 w->connected = status;
2655 if (status == 0)
2656 w->force = 0;
2657
2658 return ret;
2659 }
2660
2661 /*
2662 * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful;
2663 * called from several API functions below
2664 */
snd_soc_dapm_set_pin(struct snd_soc_dapm_context * dapm,const char * pin,int status)2665 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2666 const char *pin, int status)
2667 {
2668 int ret = __snd_soc_dapm_set_pin(dapm, pin, status);
2669
2670 return ret < 0 ? ret : 0;
2671 }
2672
2673 /**
2674 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2675 * @dapm: DAPM context
2676 *
2677 * Walks all dapm audio paths and powers widgets according to their
2678 * stream or path usage.
2679 *
2680 * Requires external locking.
2681 *
2682 * Returns 0 for success.
2683 */
snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context * dapm)2684 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2685 {
2686 /*
2687 * Suppress early reports (eg, jacks syncing their state) to avoid
2688 * silly DAPM runs during card startup.
2689 */
2690 if (!snd_soc_card_is_instantiated(dapm->card))
2691 return 0;
2692
2693 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2694 }
2695 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2696
2697 /**
2698 * snd_soc_dapm_sync - scan and power dapm paths
2699 * @dapm: DAPM context
2700 *
2701 * Walks all dapm audio paths and powers widgets according to their
2702 * stream or path usage.
2703 *
2704 * Returns 0 for success.
2705 */
snd_soc_dapm_sync(struct snd_soc_dapm_context * dapm)2706 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2707 {
2708 int ret;
2709
2710 snd_soc_dapm_mutex_lock(dapm);
2711 ret = snd_soc_dapm_sync_unlocked(dapm);
2712 snd_soc_dapm_mutex_unlock(dapm);
2713 return ret;
2714 }
2715 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2716
dapm_update_dai_chan(struct snd_soc_dapm_path * p,struct snd_soc_dapm_widget * w,int channels)2717 static int dapm_update_dai_chan(struct snd_soc_dapm_path *p,
2718 struct snd_soc_dapm_widget *w,
2719 int channels)
2720 {
2721 switch (w->id) {
2722 case snd_soc_dapm_aif_out:
2723 case snd_soc_dapm_aif_in:
2724 break;
2725 default:
2726 return 0;
2727 }
2728
2729 dev_dbg(w->dapm->dev, "%s DAI route %s -> %s\n",
2730 w->channel < channels ? "Connecting" : "Disconnecting",
2731 p->source->name, p->sink->name);
2732
2733 if (w->channel < channels)
2734 soc_dapm_connect_path(p, true, "dai update");
2735 else
2736 soc_dapm_connect_path(p, false, "dai update");
2737
2738 return 0;
2739 }
2740
dapm_update_dai_unlocked(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)2741 static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
2742 struct snd_pcm_hw_params *params,
2743 struct snd_soc_dai *dai)
2744 {
2745 int dir = substream->stream;
2746 int channels = params_channels(params);
2747 struct snd_soc_dapm_path *p;
2748 struct snd_soc_dapm_widget *w;
2749 int ret;
2750
2751 w = snd_soc_dai_get_widget(dai, dir);
2752
2753 if (!w)
2754 return 0;
2755
2756 dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name, snd_pcm_direction_name(dir));
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 = widget->dapm->component;
2791 const char *wname = widget->name;
2792
2793 if (component && 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,unsigned int num)3858 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3859 const struct snd_soc_dapm_widget *widget,
3860 unsigned 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 const struct snd_soc_pcm_stream *config = NULL;
3887 struct snd_pcm_runtime *runtime = NULL;
3888 unsigned int fmt;
3889 int ret;
3890
3891 /*
3892 * NOTE
3893 *
3894 * snd_pcm_hw_params is quite large (608 bytes on arm64) and is
3895 * starting to get a bit excessive for allocation on the stack,
3896 * especially when you're building with some of the KASAN type
3897 * stuff that increases stack usage.
3898 * So, we use kzalloc()/kfree() for params in this function.
3899 */
3900 struct snd_pcm_hw_params *params __free(kfree) = kzalloc(sizeof(*params),
3901 GFP_KERNEL);
3902 if (!params)
3903 return -ENOMEM;
3904
3905 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
3906 if (!runtime)
3907 return -ENOMEM;
3908
3909 substream->runtime = runtime;
3910
3911 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3912 snd_soc_dapm_widget_for_each_source_path(w, path) {
3913 source = path->source->priv;
3914
3915 ret = snd_soc_dai_startup(source, substream);
3916 if (ret < 0)
3917 return ret;
3918
3919 snd_soc_dai_activate(source, substream->stream);
3920 }
3921
3922 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3923 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3924 sink = path->sink->priv;
3925
3926 ret = snd_soc_dai_startup(sink, substream);
3927 if (ret < 0)
3928 return ret;
3929
3930 snd_soc_dai_activate(sink, substream->stream);
3931 }
3932
3933 substream->hw_opened = 1;
3934
3935 /*
3936 * Note: getting the config after .startup() gives a chance to
3937 * either party on the link to alter the configuration if
3938 * necessary
3939 */
3940 config = rtd->dai_link->c2c_params + rtd->c2c_params_select;
3941 if (!config) {
3942 dev_err(w->dapm->dev, "ASoC: link config missing\n");
3943 return -EINVAL;
3944 }
3945
3946 /* Be a little careful as we don't want to overflow the mask array */
3947 if (!config->formats) {
3948 dev_warn(w->dapm->dev, "ASoC: Invalid format was specified\n");
3949
3950 return -EINVAL;
3951 }
3952
3953 fmt = ffs(config->formats) - 1;
3954
3955 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3956 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3957 config->rate_min;
3958 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3959 config->rate_max;
3960 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3961 = config->channels_min;
3962 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3963 = config->channels_max;
3964
3965 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3966 snd_soc_dapm_widget_for_each_source_path(w, path) {
3967 source = path->source->priv;
3968
3969 ret = snd_soc_dai_hw_params(source, substream, params);
3970 if (ret < 0)
3971 return ret;
3972
3973 dapm_update_dai_unlocked(substream, params, source);
3974 }
3975
3976 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3977 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3978 sink = path->sink->priv;
3979
3980 ret = snd_soc_dai_hw_params(sink, substream, params);
3981 if (ret < 0)
3982 return ret;
3983
3984 dapm_update_dai_unlocked(substream, params, sink);
3985 }
3986
3987 runtime->format = params_format(params);
3988 runtime->subformat = params_subformat(params);
3989 runtime->channels = params_channels(params);
3990 runtime->rate = params_rate(params);
3991
3992 return 0;
3993 }
3994
snd_soc_dai_link_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)3995 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3996 struct snd_kcontrol *kcontrol, int event)
3997 {
3998 struct snd_soc_dapm_path *path;
3999 struct snd_soc_dai *source, *sink;
4000 struct snd_pcm_substream *substream = w->priv;
4001 int ret = 0, saved_stream = substream->stream;
4002
4003 if (WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
4004 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
4005 return -EINVAL;
4006
4007 switch (event) {
4008 case SND_SOC_DAPM_PRE_PMU:
4009 ret = snd_soc_dai_link_event_pre_pmu(w, substream);
4010 if (ret < 0)
4011 goto out;
4012
4013 break;
4014
4015 case SND_SOC_DAPM_POST_PMU:
4016 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4017 sink = path->sink->priv;
4018
4019 snd_soc_dai_digital_mute(sink, 0, SNDRV_PCM_STREAM_PLAYBACK);
4020 ret = 0;
4021 }
4022 break;
4023
4024 case SND_SOC_DAPM_PRE_PMD:
4025 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4026 sink = path->sink->priv;
4027
4028 snd_soc_dai_digital_mute(sink, 1, SNDRV_PCM_STREAM_PLAYBACK);
4029 ret = 0;
4030 }
4031
4032 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
4033 snd_soc_dapm_widget_for_each_source_path(w, path) {
4034 source = path->source->priv;
4035 snd_soc_dai_hw_free(source, substream, 0);
4036 }
4037
4038 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
4039 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4040 sink = path->sink->priv;
4041 snd_soc_dai_hw_free(sink, substream, 0);
4042 }
4043
4044 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
4045 snd_soc_dapm_widget_for_each_source_path(w, path) {
4046 source = path->source->priv;
4047 snd_soc_dai_deactivate(source, substream->stream);
4048 snd_soc_dai_shutdown(source, substream, 0);
4049 }
4050
4051 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
4052 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4053 sink = path->sink->priv;
4054 snd_soc_dai_deactivate(sink, substream->stream);
4055 snd_soc_dai_shutdown(sink, substream, 0);
4056 }
4057 break;
4058
4059 case SND_SOC_DAPM_POST_PMD:
4060 kfree(substream->runtime);
4061 substream->runtime = NULL;
4062 break;
4063
4064 default:
4065 WARN(1, "Unknown event %d\n", event);
4066 ret = -EINVAL;
4067 }
4068
4069 out:
4070 /* Restore the substream direction */
4071 substream->stream = saved_stream;
4072 return ret;
4073 }
4074
snd_soc_dapm_dai_link_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)4075 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
4076 struct snd_ctl_elem_value *ucontrol)
4077 {
4078 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4079 struct snd_soc_pcm_runtime *rtd = w->priv;
4080
4081 ucontrol->value.enumerated.item[0] = rtd->c2c_params_select;
4082
4083 return 0;
4084 }
4085
snd_soc_dapm_dai_link_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)4086 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
4087 struct snd_ctl_elem_value *ucontrol)
4088 {
4089 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4090 struct snd_soc_pcm_runtime *rtd = w->priv;
4091
4092 /* Can't change the config when widget is already powered */
4093 if (w->power)
4094 return -EBUSY;
4095
4096 if (ucontrol->value.enumerated.item[0] == rtd->c2c_params_select)
4097 return 0;
4098
4099 if (ucontrol->value.enumerated.item[0] >= rtd->dai_link->num_c2c_params)
4100 return -EINVAL;
4101
4102 rtd->c2c_params_select = ucontrol->value.enumerated.item[0];
4103
4104 return 1;
4105 }
4106
4107 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)4108 snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
4109 unsigned long *private_value,
4110 int num_c2c_params,
4111 const char **w_param_text)
4112 {
4113 int count;
4114
4115 devm_kfree(card->dev, (void *)*private_value);
4116
4117 if (!w_param_text)
4118 return;
4119
4120 for (count = 0 ; count < num_c2c_params; count++)
4121 devm_kfree(card->dev, (void *)w_param_text[count]);
4122 devm_kfree(card->dev, w_param_text);
4123 }
4124
4125 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)4126 snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card,
4127 char *link_name,
4128 const struct snd_soc_pcm_stream *c2c_params,
4129 int num_c2c_params, const char **w_param_text,
4130 unsigned long *private_value)
4131 {
4132 struct soc_enum w_param_enum[] = {
4133 SOC_ENUM_SINGLE(0, 0, 0, NULL),
4134 };
4135 struct snd_kcontrol_new kcontrol_dai_link[] = {
4136 SOC_ENUM_EXT(NULL, w_param_enum[0],
4137 snd_soc_dapm_dai_link_get,
4138 snd_soc_dapm_dai_link_put),
4139 };
4140 struct snd_kcontrol_new *kcontrol_news;
4141 const struct snd_soc_pcm_stream *config = c2c_params;
4142 int count;
4143
4144 for (count = 0 ; count < num_c2c_params; count++) {
4145 if (!config->stream_name) {
4146 dev_warn(card->dapm.dev,
4147 "ASoC: anonymous config %d for dai link %s\n",
4148 count, link_name);
4149 w_param_text[count] =
4150 devm_kasprintf(card->dev, GFP_KERNEL,
4151 "Anonymous Configuration %d",
4152 count);
4153 } else {
4154 w_param_text[count] = devm_kmemdup(card->dev,
4155 config->stream_name,
4156 strlen(config->stream_name) + 1,
4157 GFP_KERNEL);
4158 }
4159 if (!w_param_text[count])
4160 goto outfree_w_param;
4161 config++;
4162 }
4163
4164 w_param_enum[0].items = num_c2c_params;
4165 w_param_enum[0].texts = w_param_text;
4166
4167 *private_value =
4168 (unsigned long) devm_kmemdup(card->dev,
4169 (void *)(kcontrol_dai_link[0].private_value),
4170 sizeof(struct soc_enum), GFP_KERNEL);
4171 if (!*private_value) {
4172 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4173 link_name);
4174 goto outfree_w_param;
4175 }
4176 kcontrol_dai_link[0].private_value = *private_value;
4177 /* duplicate kcontrol_dai_link on heap so that memory persists */
4178 kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0],
4179 sizeof(struct snd_kcontrol_new),
4180 GFP_KERNEL);
4181 if (!kcontrol_news) {
4182 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4183 link_name);
4184 goto outfree_w_param;
4185 }
4186 return kcontrol_news;
4187
4188 outfree_w_param:
4189 snd_soc_dapm_free_kcontrol(card, private_value, num_c2c_params, w_param_text);
4190 return NULL;
4191 }
4192
4193 static struct snd_soc_dapm_widget *
snd_soc_dapm_new_dai(struct snd_soc_card * card,struct snd_pcm_substream * substream,char * id)4194 snd_soc_dapm_new_dai(struct snd_soc_card *card,
4195 struct snd_pcm_substream *substream,
4196 char *id)
4197 {
4198 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
4199 struct snd_soc_dapm_widget template;
4200 struct snd_soc_dapm_widget *w;
4201 const struct snd_kcontrol_new *kcontrol_news;
4202 int num_kcontrols;
4203 const char **w_param_text;
4204 unsigned long private_value = 0;
4205 char *link_name;
4206 int ret = -ENOMEM;
4207
4208 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
4209 rtd->dai_link->name, id);
4210 if (!link_name)
4211 goto name_fail;
4212
4213 /* allocate memory for control, only in case of multiple configs */
4214 w_param_text = NULL;
4215 kcontrol_news = NULL;
4216 num_kcontrols = 0;
4217 if (rtd->dai_link->num_c2c_params > 1) {
4218 w_param_text = devm_kcalloc(card->dev,
4219 rtd->dai_link->num_c2c_params,
4220 sizeof(char *), GFP_KERNEL);
4221 if (!w_param_text)
4222 goto param_fail;
4223
4224 num_kcontrols = 1;
4225 kcontrol_news = snd_soc_dapm_alloc_kcontrol(card, link_name,
4226 rtd->dai_link->c2c_params,
4227 rtd->dai_link->num_c2c_params,
4228 w_param_text, &private_value);
4229 if (!kcontrol_news)
4230 goto param_fail;
4231 }
4232
4233 memset(&template, 0, sizeof(template));
4234 template.reg = SND_SOC_NOPM;
4235 template.id = snd_soc_dapm_dai_link;
4236 template.name = link_name;
4237 template.event = snd_soc_dai_link_event;
4238 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
4239 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
4240 template.kcontrol_news = kcontrol_news;
4241 template.num_kcontrols = num_kcontrols;
4242
4243 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
4244
4245 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
4246 if (IS_ERR(w)) {
4247 ret = PTR_ERR(w);
4248 goto outfree_kcontrol_news;
4249 }
4250
4251 w->priv = substream;
4252
4253 return w;
4254
4255 outfree_kcontrol_news:
4256 devm_kfree(card->dev, (void *)template.kcontrol_news);
4257 snd_soc_dapm_free_kcontrol(card, &private_value,
4258 rtd->dai_link->num_c2c_params, w_param_text);
4259 param_fail:
4260 devm_kfree(card->dev, link_name);
4261 name_fail:
4262 dev_err(rtd->dev, "ASoC: Failed to create %s-%s widget: %d\n",
4263 rtd->dai_link->name, id, ret);
4264 return ERR_PTR(ret);
4265 }
4266
4267 /**
4268 * snd_soc_dapm_new_dai_widgets - Create new DAPM widgets
4269 * @dapm: DAPM context
4270 * @dai: parent DAI
4271 *
4272 * Returns 0 on success, error code otherwise.
4273 */
snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context * dapm,struct snd_soc_dai * dai)4274 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
4275 struct snd_soc_dai *dai)
4276 {
4277 struct snd_soc_dapm_widget template;
4278 struct snd_soc_dapm_widget *w;
4279
4280 WARN_ON(dapm->dev != dai->dev);
4281
4282 memset(&template, 0, sizeof(template));
4283 template.reg = SND_SOC_NOPM;
4284
4285 if (dai->driver->playback.stream_name) {
4286 template.id = snd_soc_dapm_dai_in;
4287 template.name = dai->driver->playback.stream_name;
4288 template.sname = dai->driver->playback.stream_name;
4289
4290 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4291 template.name);
4292
4293 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4294 if (IS_ERR(w))
4295 return PTR_ERR(w);
4296
4297 w->priv = dai;
4298 snd_soc_dai_set_widget_playback(dai, w);
4299 }
4300
4301 if (dai->driver->capture.stream_name) {
4302 template.id = snd_soc_dapm_dai_out;
4303 template.name = dai->driver->capture.stream_name;
4304 template.sname = dai->driver->capture.stream_name;
4305
4306 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4307 template.name);
4308
4309 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4310 if (IS_ERR(w))
4311 return PTR_ERR(w);
4312
4313 w->priv = dai;
4314 snd_soc_dai_set_widget_capture(dai, w);
4315 }
4316
4317 return 0;
4318 }
4319 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_dai_widgets);
4320
snd_soc_dapm_link_dai_widgets(struct snd_soc_card * card)4321 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
4322 {
4323 struct snd_soc_dapm_widget *dai_w, *w;
4324 struct snd_soc_dapm_widget *src, *sink;
4325 struct snd_soc_dai *dai;
4326
4327 /* For each DAI widget... */
4328 for_each_card_widgets(card, dai_w) {
4329 switch (dai_w->id) {
4330 case snd_soc_dapm_dai_in:
4331 case snd_soc_dapm_dai_out:
4332 break;
4333 default:
4334 continue;
4335 }
4336
4337 /* let users know there is no DAI to link */
4338 if (!dai_w->priv) {
4339 dev_dbg(card->dev, "dai widget %s has no DAI\n",
4340 dai_w->name);
4341 continue;
4342 }
4343
4344 dai = dai_w->priv;
4345
4346 /* ...find all widgets with the same stream and link them */
4347 for_each_card_widgets(card, w) {
4348 if (w->dapm != dai_w->dapm)
4349 continue;
4350
4351 switch (w->id) {
4352 case snd_soc_dapm_dai_in:
4353 case snd_soc_dapm_dai_out:
4354 continue;
4355 default:
4356 break;
4357 }
4358
4359 if (!w->sname || !strstr(w->sname, dai_w->sname))
4360 continue;
4361
4362 if (dai_w->id == snd_soc_dapm_dai_in) {
4363 src = dai_w;
4364 sink = w;
4365 } else {
4366 src = w;
4367 sink = dai_w;
4368 }
4369 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
4370 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
4371 }
4372 }
4373
4374 return 0;
4375 }
4376
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)4377 static void dapm_connect_dai_routes(struct snd_soc_dapm_context *dapm,
4378 struct snd_soc_dai *src_dai,
4379 struct snd_soc_dapm_widget *src,
4380 struct snd_soc_dapm_widget *dai,
4381 struct snd_soc_dai *sink_dai,
4382 struct snd_soc_dapm_widget *sink)
4383 {
4384 dev_dbg(dapm->dev, "connected DAI link %s:%s -> %s:%s\n",
4385 src_dai->component->name, src->name,
4386 sink_dai->component->name, sink->name);
4387
4388 if (dai) {
4389 snd_soc_dapm_add_path(dapm, src, dai, NULL, NULL);
4390 src = dai;
4391 }
4392
4393 snd_soc_dapm_add_path(dapm, src, sink, NULL, NULL);
4394 }
4395
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)4396 static void dapm_connect_dai_pair(struct snd_soc_card *card,
4397 struct snd_soc_pcm_runtime *rtd,
4398 struct snd_soc_dai *codec_dai,
4399 struct snd_soc_dai *cpu_dai)
4400 {
4401 struct snd_soc_dai_link *dai_link = rtd->dai_link;
4402 struct snd_soc_dapm_widget *codec, *cpu;
4403 struct snd_soc_dai *src_dai[] = { cpu_dai, codec_dai };
4404 struct snd_soc_dai *sink_dai[] = { codec_dai, cpu_dai };
4405 struct snd_soc_dapm_widget **src[] = { &cpu, &codec };
4406 struct snd_soc_dapm_widget **sink[] = { &codec, &cpu };
4407 char *widget_name[] = { "playback", "capture" };
4408 int stream;
4409
4410 for_each_pcm_streams(stream) {
4411 int stream_cpu, stream_codec;
4412
4413 stream_cpu = snd_soc_get_stream_cpu(dai_link, stream);
4414 stream_codec = stream;
4415
4416 /* connect BE DAI playback if widgets are valid */
4417 cpu = snd_soc_dai_get_widget(cpu_dai, stream_cpu);
4418 codec = snd_soc_dai_get_widget(codec_dai, stream_codec);
4419
4420 if (!cpu || !codec)
4421 continue;
4422
4423 /* special handling for [Codec2Codec] */
4424 if (dai_link->c2c_params && !rtd->c2c_widget[stream]) {
4425 struct snd_pcm_substream *substream = rtd->pcm->streams[stream].substream;
4426 struct snd_soc_dapm_widget *dai = snd_soc_dapm_new_dai(card, substream,
4427 widget_name[stream]);
4428
4429 if (IS_ERR(dai))
4430 continue;
4431
4432 rtd->c2c_widget[stream] = dai;
4433 }
4434
4435 dapm_connect_dai_routes(&card->dapm, src_dai[stream], *src[stream],
4436 rtd->c2c_widget[stream],
4437 sink_dai[stream], *sink[stream]);
4438 }
4439 }
4440
soc_dapm_dai_stream_event(struct snd_soc_dai * dai,int stream,int event)4441 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
4442 int event)
4443 {
4444 struct snd_soc_dapm_widget *w;
4445
4446 w = snd_soc_dai_get_widget(dai, stream);
4447
4448 if (w) {
4449 unsigned int ep;
4450
4451 dapm_mark_dirty(w, "stream event");
4452
4453 if (w->id == snd_soc_dapm_dai_in) {
4454 ep = SND_SOC_DAPM_EP_SOURCE;
4455 dapm_widget_invalidate_input_paths(w);
4456 } else {
4457 ep = SND_SOC_DAPM_EP_SINK;
4458 dapm_widget_invalidate_output_paths(w);
4459 }
4460
4461 switch (event) {
4462 case SND_SOC_DAPM_STREAM_START:
4463 w->active = 1;
4464 w->is_ep = ep;
4465 break;
4466 case SND_SOC_DAPM_STREAM_STOP:
4467 w->active = 0;
4468 w->is_ep = 0;
4469 break;
4470 case SND_SOC_DAPM_STREAM_SUSPEND:
4471 case SND_SOC_DAPM_STREAM_RESUME:
4472 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
4473 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
4474 break;
4475 }
4476 }
4477 }
4478
snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card * card)4479 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
4480 {
4481 struct snd_soc_pcm_runtime *rtd;
4482 struct snd_soc_dai *cpu_dai;
4483 struct snd_soc_dai *codec_dai;
4484
4485 /* for each BE DAI link... */
4486 for_each_card_rtds(card, rtd) {
4487 struct snd_soc_dai_link_ch_map *ch_maps;
4488 int i;
4489
4490 /*
4491 * dynamic FE links have no fixed DAI mapping.
4492 * CODEC<->CODEC links have no direct connection.
4493 */
4494 if (rtd->dai_link->dynamic)
4495 continue;
4496
4497 /*
4498 * see
4499 * soc.h :: [dai_link->ch_maps Image sample]
4500 */
4501 for_each_rtd_ch_maps(rtd, i, ch_maps) {
4502 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu);
4503 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
4504
4505 dapm_connect_dai_pair(card, rtd, codec_dai, cpu_dai);
4506 }
4507 }
4508 }
4509
soc_dapm_stream_event(struct snd_soc_pcm_runtime * rtd,int stream,int event)4510 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4511 int event)
4512 {
4513 struct snd_soc_dai *dai;
4514 int i;
4515
4516 for_each_rtd_dais(rtd, i, dai)
4517 soc_dapm_dai_stream_event(dai, stream, event);
4518
4519 dapm_power_widgets(rtd->card, event);
4520 }
4521
4522 /**
4523 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4524 * @rtd: PCM runtime data
4525 * @stream: stream name
4526 * @event: stream event
4527 *
4528 * Sends a stream event to the dapm core. The core then makes any
4529 * necessary widget power changes.
4530 *
4531 * Returns 0 for success else error.
4532 */
snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime * rtd,int stream,int event)4533 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4534 int event)
4535 {
4536 struct snd_soc_card *card = rtd->card;
4537
4538 snd_soc_dapm_mutex_lock(card);
4539 soc_dapm_stream_event(rtd, stream, event);
4540 snd_soc_dapm_mutex_unlock(card);
4541 }
4542
snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime * rtd,int stream)4543 void snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime *rtd, int stream)
4544 {
4545 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
4546 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
4547 /* powered down playback stream now */
4548 snd_soc_dapm_stream_event(rtd,
4549 SNDRV_PCM_STREAM_PLAYBACK,
4550 SND_SOC_DAPM_STREAM_STOP);
4551 } else {
4552 /* start delayed pop wq here for playback streams */
4553 rtd->pop_wait = 1;
4554 queue_delayed_work(system_power_efficient_wq,
4555 &rtd->delayed_work,
4556 msecs_to_jiffies(rtd->pmdown_time));
4557 }
4558 } else {
4559 /* capture streams can be powered down now */
4560 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
4561 SND_SOC_DAPM_STREAM_STOP);
4562 }
4563 }
4564 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_stop);
4565
4566 /**
4567 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4568 * @dapm: DAPM context
4569 * @pin: pin name
4570 *
4571 * Enables input/output pin and its parents or children widgets iff there is
4572 * a valid audio route and active audio stream.
4573 *
4574 * Requires external locking.
4575 *
4576 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4577 * do any widget power switching.
4578 */
snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4579 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4580 const char *pin)
4581 {
4582 return snd_soc_dapm_set_pin(dapm, pin, 1);
4583 }
4584 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4585
4586 /**
4587 * snd_soc_dapm_enable_pin - enable pin.
4588 * @dapm: DAPM context
4589 * @pin: pin name
4590 *
4591 * Enables input/output pin and its parents or children widgets iff there is
4592 * a valid audio route and active audio stream.
4593 *
4594 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4595 * do any widget power switching.
4596 */
snd_soc_dapm_enable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4597 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4598 {
4599 int ret;
4600
4601 snd_soc_dapm_mutex_lock(dapm);
4602
4603 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4604
4605 snd_soc_dapm_mutex_unlock(dapm);
4606
4607 return ret;
4608 }
4609 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4610
4611 /**
4612 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4613 * @dapm: DAPM context
4614 * @pin: pin name
4615 *
4616 * Enables input/output pin regardless of any other state. This is
4617 * intended for use with microphone bias supplies used in microphone
4618 * jack detection.
4619 *
4620 * Requires external locking.
4621 *
4622 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4623 * do any widget power switching.
4624 */
snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4625 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4626 const char *pin)
4627 {
4628 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4629
4630 if (!w) {
4631 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4632 return -EINVAL;
4633 }
4634
4635 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4636 if (!w->connected) {
4637 /*
4638 * w->force does not affect the number of input or output paths,
4639 * so we only have to recheck if w->connected is changed
4640 */
4641 dapm_widget_invalidate_input_paths(w);
4642 dapm_widget_invalidate_output_paths(w);
4643 w->connected = 1;
4644 }
4645 w->force = 1;
4646 dapm_mark_dirty(w, "force enable");
4647
4648 return 0;
4649 }
4650 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4651
4652 /**
4653 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4654 * @dapm: DAPM context
4655 * @pin: pin name
4656 *
4657 * Enables input/output pin regardless of any other state. This is
4658 * intended for use with microphone bias supplies used in microphone
4659 * jack detection.
4660 *
4661 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4662 * do any widget power switching.
4663 */
snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4664 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4665 const char *pin)
4666 {
4667 int ret;
4668
4669 snd_soc_dapm_mutex_lock(dapm);
4670
4671 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4672
4673 snd_soc_dapm_mutex_unlock(dapm);
4674
4675 return ret;
4676 }
4677 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4678
4679 /**
4680 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4681 * @dapm: DAPM context
4682 * @pin: pin name
4683 *
4684 * Disables input/output pin and its parents or children widgets.
4685 *
4686 * Requires external locking.
4687 *
4688 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4689 * do any widget power switching.
4690 */
snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4691 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4692 const char *pin)
4693 {
4694 return snd_soc_dapm_set_pin(dapm, pin, 0);
4695 }
4696 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4697
4698 /**
4699 * snd_soc_dapm_disable_pin - disable pin.
4700 * @dapm: DAPM context
4701 * @pin: pin name
4702 *
4703 * Disables input/output pin and its parents or children widgets.
4704 *
4705 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4706 * do any widget power switching.
4707 */
snd_soc_dapm_disable_pin(struct snd_soc_dapm_context * dapm,const char * pin)4708 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4709 const char *pin)
4710 {
4711 int ret;
4712
4713 snd_soc_dapm_mutex_lock(dapm);
4714
4715 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4716
4717 snd_soc_dapm_mutex_unlock(dapm);
4718
4719 return ret;
4720 }
4721 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4722
4723 /**
4724 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4725 * @dapm: DAPM context
4726 * @pin: pin name
4727 *
4728 * Marks the specified pin as being not connected, disabling it along
4729 * any parent or child widgets. At present this is identical to
4730 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4731 * additional things such as disabling controls which only affect
4732 * paths through the pin.
4733 *
4734 * Requires external locking.
4735 *
4736 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4737 * do any widget power switching.
4738 */
snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context * dapm,const char * pin)4739 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4740 const char *pin)
4741 {
4742 return snd_soc_dapm_set_pin(dapm, pin, 0);
4743 }
4744 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4745
4746 /**
4747 * snd_soc_dapm_nc_pin - permanently disable pin.
4748 * @dapm: DAPM context
4749 * @pin: pin name
4750 *
4751 * Marks the specified pin as being not connected, disabling it along
4752 * any parent or child widgets. At present this is identical to
4753 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4754 * additional things such as disabling controls which only affect
4755 * paths through the pin.
4756 *
4757 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4758 * do any widget power switching.
4759 */
snd_soc_dapm_nc_pin(struct snd_soc_dapm_context * dapm,const char * pin)4760 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4761 {
4762 int ret;
4763
4764 snd_soc_dapm_mutex_lock(dapm);
4765
4766 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4767
4768 snd_soc_dapm_mutex_unlock(dapm);
4769
4770 return ret;
4771 }
4772 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4773
4774 /**
4775 * snd_soc_dapm_get_pin_status - get audio pin status
4776 * @dapm: DAPM context
4777 * @pin: audio signal pin endpoint (or start point)
4778 *
4779 * Get audio pin status - connected or disconnected.
4780 *
4781 * Returns 1 for connected otherwise 0.
4782 */
snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context * dapm,const char * pin)4783 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4784 const char *pin)
4785 {
4786 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4787
4788 if (w)
4789 return w->connected;
4790
4791 return 0;
4792 }
4793 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4794
4795 /**
4796 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4797 * @dapm: DAPM context
4798 * @pin: audio signal pin endpoint (or start point)
4799 *
4800 * Mark the given endpoint or pin as ignoring suspend. When the
4801 * system is disabled a path between two endpoints flagged as ignoring
4802 * suspend will not be disabled. The path must already be enabled via
4803 * normal means at suspend time, it will not be turned on if it was not
4804 * already enabled.
4805 */
snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context * dapm,const char * pin)4806 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4807 const char *pin)
4808 {
4809 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4810
4811 if (!w) {
4812 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4813 return -EINVAL;
4814 }
4815
4816 w->ignore_suspend = 1;
4817
4818 return 0;
4819 }
4820 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4821
4822 /**
4823 * snd_soc_dapm_free - free dapm resources
4824 * @dapm: DAPM context
4825 *
4826 * Free all dapm widgets and resources.
4827 */
snd_soc_dapm_free(struct snd_soc_dapm_context * dapm)4828 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4829 {
4830 dapm_debugfs_cleanup(dapm);
4831 dapm_free_widgets(dapm);
4832 list_del(&dapm->list);
4833 }
4834 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4835
snd_soc_dapm_init(struct snd_soc_dapm_context * dapm,struct snd_soc_card * card,struct snd_soc_component * component)4836 void snd_soc_dapm_init(struct snd_soc_dapm_context *dapm,
4837 struct snd_soc_card *card,
4838 struct snd_soc_component *component)
4839 {
4840 dapm->card = card;
4841 dapm->component = component;
4842 dapm->bias_level = SND_SOC_BIAS_OFF;
4843
4844 if (component) {
4845 dapm->dev = component->dev;
4846 dapm->idle_bias_off = !component->driver->idle_bias_on;
4847 dapm->suspend_bias_off = component->driver->suspend_bias_off;
4848 } else {
4849 dapm->dev = card->dev;
4850 }
4851
4852 INIT_LIST_HEAD(&dapm->list);
4853 /* see for_each_card_dapms */
4854 list_add(&dapm->list, &card->dapm_list);
4855 }
4856 EXPORT_SYMBOL_GPL(snd_soc_dapm_init);
4857
soc_dapm_shutdown_dapm(struct snd_soc_dapm_context * dapm)4858 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4859 {
4860 struct snd_soc_card *card = dapm->card;
4861 struct snd_soc_dapm_widget *w;
4862 LIST_HEAD(down_list);
4863 int powerdown = 0;
4864
4865 snd_soc_dapm_mutex_lock_root(card);
4866
4867 for_each_card_widgets(dapm->card, w) {
4868 if (w->dapm != dapm)
4869 continue;
4870 if (w->power) {
4871 dapm_seq_insert(w, &down_list, false);
4872 w->new_power = 0;
4873 powerdown = 1;
4874 }
4875 }
4876
4877 /* If there were no widgets to power down we're already in
4878 * standby.
4879 */
4880 if (powerdown) {
4881 if (dapm->bias_level == SND_SOC_BIAS_ON)
4882 snd_soc_dapm_set_bias_level(dapm,
4883 SND_SOC_BIAS_PREPARE);
4884 dapm_seq_run(card, &down_list, 0, false);
4885 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4886 snd_soc_dapm_set_bias_level(dapm,
4887 SND_SOC_BIAS_STANDBY);
4888 }
4889
4890 snd_soc_dapm_mutex_unlock(card);
4891 }
4892
4893 /*
4894 * snd_soc_dapm_shutdown - callback for system shutdown
4895 */
snd_soc_dapm_shutdown(struct snd_soc_card * card)4896 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4897 {
4898 struct snd_soc_dapm_context *dapm;
4899
4900 for_each_card_dapms(card, dapm) {
4901 if (dapm != &card->dapm) {
4902 soc_dapm_shutdown_dapm(dapm);
4903 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4904 snd_soc_dapm_set_bias_level(dapm,
4905 SND_SOC_BIAS_OFF);
4906 }
4907 }
4908
4909 soc_dapm_shutdown_dapm(&card->dapm);
4910 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4911 snd_soc_dapm_set_bias_level(&card->dapm,
4912 SND_SOC_BIAS_OFF);
4913 }
4914
4915 /* Module information */
4916 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4917 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4918 MODULE_LICENSE("GPL");
4919