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