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