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1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-pcm.c -- ALSA SoC PCM
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Authors: Liam Girdwood <lrg@ti.com>
11// Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/delay.h>
16#include <linux/pinctrl/consumer.h>
17#include <linux/pm_runtime.h>
18#include <linux/slab.h>
19#include <linux/workqueue.h>
20#include <linux/export.h>
21#include <linux/debugfs.h>
22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
26#include <sound/soc-dpcm.h>
27#include <sound/soc-link.h>
28#include <sound/initval.h>
29
30#define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
31static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
32 const char *func, int ret)
33{
34 /* Positive, Zero values are not errors */
35 if (ret >= 0)
36 return ret;
37
38 /* Negative values might be errors */
39 switch (ret) {
40 case -EPROBE_DEFER:
41 case -ENOTSUPP:
42 break;
43 default:
44 dev_err(rtd->dev,
45 "ASoC: error at %s on %s: %d\n",
46 func, rtd->dai_link->name, ret);
47 }
48
49 return ret;
50}
51
52static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd)
53{
54 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
55}
56
57static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd)
58{
59 mutex_unlock(&rtd->card->pcm_mutex);
60}
61
62#define snd_soc_dpcm_mutex_assert_held(rtd) \
63 lockdep_assert_held(&(rtd)->card->pcm_mutex)
64
65static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
66 int stream)
67{
68 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
69}
70
71#define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
72 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
73
74static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
75 int stream)
76{
77 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
78}
79
80#define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
81 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
82
83#define DPCM_MAX_BE_USERS 8
84
85static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
86{
87 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
88}
89static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
90{
91 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
92}
93
94#ifdef CONFIG_DEBUG_FS
95static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
96{
97 switch (state) {
98 case SND_SOC_DPCM_STATE_NEW:
99 return "new";
100 case SND_SOC_DPCM_STATE_OPEN:
101 return "open";
102 case SND_SOC_DPCM_STATE_HW_PARAMS:
103 return "hw_params";
104 case SND_SOC_DPCM_STATE_PREPARE:
105 return "prepare";
106 case SND_SOC_DPCM_STATE_START:
107 return "start";
108 case SND_SOC_DPCM_STATE_STOP:
109 return "stop";
110 case SND_SOC_DPCM_STATE_SUSPEND:
111 return "suspend";
112 case SND_SOC_DPCM_STATE_PAUSED:
113 return "paused";
114 case SND_SOC_DPCM_STATE_HW_FREE:
115 return "hw_free";
116 case SND_SOC_DPCM_STATE_CLOSE:
117 return "close";
118 }
119
120 return "unknown";
121}
122
123static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
124 int stream, char *buf, size_t size)
125{
126 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
127 struct snd_soc_dpcm *dpcm;
128 ssize_t offset = 0;
129
130 /* FE state */
131 offset += scnprintf(buf + offset, size - offset,
132 "[%s - %s]\n", fe->dai_link->name,
133 stream ? "Capture" : "Playback");
134
135 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
136 dpcm_state_string(fe->dpcm[stream].state));
137
138 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
139 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
140 offset += scnprintf(buf + offset, size - offset,
141 "Hardware Params: "
142 "Format = %s, Channels = %d, Rate = %d\n",
143 snd_pcm_format_name(params_format(params)),
144 params_channels(params),
145 params_rate(params));
146
147 /* BEs state */
148 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
149
150 if (list_empty(&fe->dpcm[stream].be_clients)) {
151 offset += scnprintf(buf + offset, size - offset,
152 " No active DSP links\n");
153 goto out;
154 }
155
156 for_each_dpcm_be(fe, stream, dpcm) {
157 struct snd_soc_pcm_runtime *be = dpcm->be;
158 params = &be->dpcm[stream].hw_params;
159
160 offset += scnprintf(buf + offset, size - offset,
161 "- %s\n", be->dai_link->name);
162
163 offset += scnprintf(buf + offset, size - offset,
164 " State: %s\n",
165 dpcm_state_string(be->dpcm[stream].state));
166
167 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
168 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
169 offset += scnprintf(buf + offset, size - offset,
170 " Hardware Params: "
171 "Format = %s, Channels = %d, Rate = %d\n",
172 snd_pcm_format_name(params_format(params)),
173 params_channels(params),
174 params_rate(params));
175 }
176out:
177 return offset;
178}
179
180static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
181 size_t count, loff_t *ppos)
182{
183 struct snd_soc_pcm_runtime *fe = file->private_data;
184 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
185 int stream;
186 char *buf;
187
188 if (fe->dai_link->num_cpus > 1) {
189 dev_err(fe->dev,
190 "%s doesn't support Multi CPU yet\n", __func__);
191 return -EINVAL;
192 }
193
194 buf = kmalloc(out_count, GFP_KERNEL);
195 if (!buf)
196 return -ENOMEM;
197
198 snd_soc_dpcm_mutex_lock(fe);
199 for_each_pcm_streams(stream)
200 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
201 offset += dpcm_show_state(fe, stream,
202 buf + offset,
203 out_count - offset);
204 snd_soc_dpcm_mutex_unlock(fe);
205
206 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
207
208 kfree(buf);
209 return ret;
210}
211
212static const struct file_operations dpcm_state_fops = {
213 .open = simple_open,
214 .read = dpcm_state_read_file,
215 .llseek = default_llseek,
216};
217
218void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
219{
220 if (!rtd->dai_link->dynamic)
221 return;
222
223 if (!rtd->card->debugfs_card_root)
224 return;
225
226 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
227 rtd->card->debugfs_card_root);
228
229 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
230 rtd, &dpcm_state_fops);
231}
232
233static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
234{
235 char *name;
236
237 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
238 stream ? "capture" : "playback");
239 if (name) {
240 dpcm->debugfs_state = debugfs_create_dir(
241 name, dpcm->fe->debugfs_dpcm_root);
242 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
243 &dpcm->state);
244 kfree(name);
245 }
246}
247
248static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
249{
250 debugfs_remove_recursive(dpcm->debugfs_state);
251}
252
253#else
254static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
255 int stream)
256{
257}
258
259static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
260{
261}
262#endif
263
264/* Set FE's runtime_update state; the state is protected via PCM stream lock
265 * for avoiding the race with trigger callback.
266 * If the state is unset and a trigger is pending while the previous operation,
267 * process the pending trigger action here.
268 */
269static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
270static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
271 int stream, enum snd_soc_dpcm_update state)
272{
273 struct snd_pcm_substream *substream =
274 snd_soc_dpcm_get_substream(fe, stream);
275
276 snd_soc_dpcm_stream_lock_irq(fe, stream);
277 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
278 dpcm_fe_dai_do_trigger(substream,
279 fe->dpcm[stream].trigger_pending - 1);
280 fe->dpcm[stream].trigger_pending = 0;
281 }
282 fe->dpcm[stream].runtime_update = state;
283 snd_soc_dpcm_stream_unlock_irq(fe, stream);
284}
285
286static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
287 int stream, enum snd_soc_dpcm_update state)
288{
289 be->dpcm[stream].runtime_update = state;
290}
291
292/**
293 * snd_soc_runtime_action() - Increment/Decrement active count for
294 * PCM runtime components
295 * @rtd: ASoC PCM runtime that is activated
296 * @stream: Direction of the PCM stream
297 * @action: Activate stream if 1. Deactivate if -1.
298 *
299 * Increments/Decrements the active count for all the DAIs and components
300 * attached to a PCM runtime.
301 * Should typically be called when a stream is opened.
302 *
303 * Must be called with the rtd->card->pcm_mutex being held
304 */
305void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
306 int stream, int action)
307{
308 struct snd_soc_dai *dai;
309 int i;
310
311 snd_soc_dpcm_mutex_assert_held(rtd);
312
313 for_each_rtd_dais(rtd, i, dai)
314 snd_soc_dai_action(dai, stream, action);
315}
316EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
317
318/**
319 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
320 * @rtd: The ASoC PCM runtime that should be checked.
321 *
322 * This function checks whether the power down delay should be ignored for a
323 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
324 * been configured to ignore the delay, or if none of the components benefits
325 * from having the delay.
326 */
327bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
328{
329 struct snd_soc_component *component;
330 bool ignore = true;
331 int i;
332
333 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
334 return true;
335
336 for_each_rtd_components(rtd, i, component)
337 ignore &= !component->driver->use_pmdown_time;
338
339 return ignore;
340}
341
342/**
343 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
344 * @substream: the pcm substream
345 * @hw: the hardware parameters
346 *
347 * Sets the substream runtime hardware parameters.
348 */
349int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
350 const struct snd_pcm_hardware *hw)
351{
352 substream->runtime->hw = *hw;
353
354 return 0;
355}
356EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
357
358/* DPCM stream event, send event to FE and all active BEs. */
359int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
360 int event)
361{
362 struct snd_soc_dpcm *dpcm;
363
364 snd_soc_dpcm_mutex_assert_held(fe);
365
366 for_each_dpcm_be(fe, dir, dpcm) {
367
368 struct snd_soc_pcm_runtime *be = dpcm->be;
369
370 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
371 be->dai_link->name, event, dir);
372
373 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
374 (be->dpcm[dir].users >= 1))
375 continue;
376
377 snd_soc_dapm_stream_event(be, dir, event);
378 }
379
380 snd_soc_dapm_stream_event(fe, dir, event);
381
382 return 0;
383}
384
385static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
386 struct snd_pcm_hw_params *params)
387{
388 if (params) {
389 dai->rate = params_rate(params);
390 dai->channels = params_channels(params);
391 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
392 } else {
393 dai->rate = 0;
394 dai->channels = 0;
395 dai->sample_bits = 0;
396 }
397}
398
399static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
400 struct snd_soc_dai *soc_dai)
401{
402 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
403 int ret;
404
405 if (!snd_soc_dai_active(soc_dai))
406 return 0;
407
408#define __soc_pcm_apply_symmetry(name, NAME) \
409 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
410 rtd->dai_link->symmetric_##name)) { \
411 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
412 #name, soc_dai->name); \
413 \
414 ret = snd_pcm_hw_constraint_single(substream->runtime, \
415 SNDRV_PCM_HW_PARAM_##NAME,\
416 soc_dai->name); \
417 if (ret < 0) { \
418 dev_err(soc_dai->dev, \
419 "ASoC: Unable to apply %s constraint: %d\n",\
420 #name, ret); \
421 return ret; \
422 } \
423 }
424
425 __soc_pcm_apply_symmetry(rate, RATE);
426 __soc_pcm_apply_symmetry(channels, CHANNELS);
427 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
428
429 return 0;
430}
431
432static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
433 struct snd_pcm_hw_params *params)
434{
435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
436 struct snd_soc_dai d;
437 struct snd_soc_dai *dai;
438 struct snd_soc_dai *cpu_dai;
439 unsigned int symmetry, i;
440
441 d.name = __func__;
442 soc_pcm_set_dai_params(&d, params);
443
444#define __soc_pcm_params_symmetry(xxx) \
445 symmetry = rtd->dai_link->symmetric_##xxx; \
446 for_each_rtd_dais(rtd, i, dai) \
447 symmetry |= dai->driver->symmetric_##xxx; \
448 \
449 if (symmetry) \
450 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
451 if (!snd_soc_dai_is_dummy(cpu_dai) && \
452 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
453 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
454 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
455 return -EINVAL; \
456 }
457
458 /* reject unmatched parameters when applying symmetry */
459 __soc_pcm_params_symmetry(rate);
460 __soc_pcm_params_symmetry(channels);
461 __soc_pcm_params_symmetry(sample_bits);
462
463 return 0;
464}
465
466static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
467{
468 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
469 struct snd_soc_dai_link *link = rtd->dai_link;
470 struct snd_soc_dai *dai;
471 unsigned int symmetry, i;
472
473 symmetry = link->symmetric_rate ||
474 link->symmetric_channels ||
475 link->symmetric_sample_bits;
476
477 for_each_rtd_dais(rtd, i, dai)
478 symmetry = symmetry ||
479 dai->driver->symmetric_rate ||
480 dai->driver->symmetric_channels ||
481 dai->driver->symmetric_sample_bits;
482
483 if (symmetry)
484 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
485}
486
487static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
488{
489 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
490 int ret;
491
492 if (!bits)
493 return;
494
495 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
496 if (ret != 0)
497 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
498 bits, ret);
499}
500
501static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
502{
503 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
504 struct snd_soc_dai *cpu_dai;
505 struct snd_soc_dai *codec_dai;
506 int stream = substream->stream;
507 int i;
508 unsigned int bits = 0, cpu_bits = 0;
509
510 for_each_rtd_codec_dais(rtd, i, codec_dai) {
511 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
512
513 if (pcm_codec->sig_bits == 0) {
514 bits = 0;
515 break;
516 }
517 bits = max(pcm_codec->sig_bits, bits);
518 }
519
520 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
521 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
522
523 if (pcm_cpu->sig_bits == 0) {
524 cpu_bits = 0;
525 break;
526 }
527 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
528 }
529
530 soc_pcm_set_msb(substream, bits);
531 soc_pcm_set_msb(substream, cpu_bits);
532}
533
534static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
535{
536 hw->rates = UINT_MAX;
537 hw->rate_min = 0;
538 hw->rate_max = UINT_MAX;
539 hw->channels_min = 0;
540 hw->channels_max = UINT_MAX;
541 hw->formats = ULLONG_MAX;
542}
543
544static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
545 struct snd_soc_pcm_stream *p)
546{
547 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
548
549 /* setup hw->rate_min/max via hw->rates first */
550 snd_pcm_hw_limit_rates(hw);
551
552 /* update hw->rate_min/max by snd_soc_pcm_stream */
553 hw->rate_min = max(hw->rate_min, p->rate_min);
554 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
555}
556
557static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
558 struct snd_soc_pcm_stream *p)
559{
560 hw->channels_min = max(hw->channels_min, p->channels_min);
561 hw->channels_max = min(hw->channels_max, p->channels_max);
562}
563
564static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
565 struct snd_soc_pcm_stream *p)
566{
567 hw->formats &= p->formats;
568}
569
570/**
571 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
572 * @rtd: ASoC PCM runtime
573 * @hw: PCM hardware parameters (output)
574 * @stream: Direction of the PCM stream
575 *
576 * Calculates the subset of stream parameters supported by all DAIs
577 * associated with the PCM stream.
578 */
579int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
580 struct snd_pcm_hardware *hw, int stream)
581{
582 struct snd_soc_dai *codec_dai;
583 struct snd_soc_dai *cpu_dai;
584 struct snd_soc_pcm_stream *codec_stream;
585 struct snd_soc_pcm_stream *cpu_stream;
586 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
587 int i;
588
589 soc_pcm_hw_init(hw);
590
591 /* first calculate min/max only for CPUs in the DAI link */
592 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
593
594 /*
595 * Skip CPUs which don't support the current stream type.
596 * Otherwise, since the rate, channel, and format values will
597 * zero in that case, we would have no usable settings left,
598 * causing the resulting setup to fail.
599 */
600 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
601 continue;
602
603 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
604
605 soc_pcm_hw_update_chan(hw, cpu_stream);
606 soc_pcm_hw_update_rate(hw, cpu_stream);
607 soc_pcm_hw_update_format(hw, cpu_stream);
608 }
609 cpu_chan_min = hw->channels_min;
610 cpu_chan_max = hw->channels_max;
611
612 /* second calculate min/max only for CODECs in the DAI link */
613 for_each_rtd_codec_dais(rtd, i, codec_dai) {
614
615 /*
616 * Skip CODECs which don't support the current stream type.
617 * Otherwise, since the rate, channel, and format values will
618 * zero in that case, we would have no usable settings left,
619 * causing the resulting setup to fail.
620 */
621 if (!snd_soc_dai_stream_valid(codec_dai, stream))
622 continue;
623
624 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
625
626 soc_pcm_hw_update_chan(hw, codec_stream);
627 soc_pcm_hw_update_rate(hw, codec_stream);
628 soc_pcm_hw_update_format(hw, codec_stream);
629 }
630
631 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
632 if (!hw->channels_min)
633 return -EINVAL;
634
635 /*
636 * chan min/max cannot be enforced if there are multiple CODEC DAIs
637 * connected to CPU DAI(s), use CPU DAI's directly and let
638 * channel allocation be fixed up later
639 */
640 if (rtd->dai_link->num_codecs > 1) {
641 hw->channels_min = cpu_chan_min;
642 hw->channels_max = cpu_chan_max;
643 }
644
645 return 0;
646}
647EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
648
649static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
650{
651 struct snd_pcm_hardware *hw = &substream->runtime->hw;
652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
653 u64 formats = hw->formats;
654
655 /*
656 * At least one CPU and one CODEC should match. Otherwise, we should
657 * have bailed out on a higher level, since there would be no CPU or
658 * CODEC to support the transfer direction in that case.
659 */
660 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
661
662 if (formats)
663 hw->formats &= formats;
664}
665
666static int soc_pcm_components_open(struct snd_pcm_substream *substream)
667{
668 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
669 struct snd_soc_component *component;
670 int i, ret = 0;
671
672 for_each_rtd_components(rtd, i, component) {
673 ret = snd_soc_component_module_get_when_open(component, substream);
674 if (ret < 0)
675 break;
676
677 ret = snd_soc_component_open(component, substream);
678 if (ret < 0)
679 break;
680 }
681
682 return ret;
683}
684
685static int soc_pcm_components_close(struct snd_pcm_substream *substream,
686 int rollback)
687{
688 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
689 struct snd_soc_component *component;
690 int i, ret = 0;
691
692 for_each_rtd_components(rtd, i, component) {
693 int r = snd_soc_component_close(component, substream, rollback);
694 if (r < 0)
695 ret = r; /* use last ret */
696
697 snd_soc_component_module_put_when_close(component, substream, rollback);
698 }
699
700 return ret;
701}
702
703static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
704 struct snd_pcm_substream *substream, int rollback)
705{
706 struct snd_soc_component *component;
707 struct snd_soc_dai *dai;
708 int i;
709
710 snd_soc_dpcm_mutex_assert_held(rtd);
711
712 if (!rollback) {
713 snd_soc_runtime_deactivate(rtd, substream->stream);
714 /* clear the corresponding DAIs parameters when going to be inactive */
715 for_each_rtd_dais(rtd, i, dai) {
716 if (snd_soc_dai_active(dai) == 0)
717 soc_pcm_set_dai_params(dai, NULL);
718
719 if (snd_soc_dai_stream_active(dai, substream->stream) == 0)
720 snd_soc_dai_digital_mute(dai, 1, substream->stream);
721 }
722 }
723
724 for_each_rtd_dais(rtd, i, dai)
725 snd_soc_dai_shutdown(dai, substream, rollback);
726
727 snd_soc_link_shutdown(substream, rollback);
728
729 soc_pcm_components_close(substream, rollback);
730
731 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
732
733 for_each_rtd_components(rtd, i, component)
734 if (!snd_soc_component_active(component))
735 pinctrl_pm_select_sleep_state(component->dev);
736
737 return 0;
738}
739
740/*
741 * Called by ALSA when a PCM substream is closed. Private data can be
742 * freed here. The cpu DAI, codec DAI, machine and components are also
743 * shutdown.
744 */
745static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
746 struct snd_pcm_substream *substream)
747{
748 return soc_pcm_clean(rtd, substream, 0);
749}
750
751/* PCM close ops for non-DPCM streams */
752static int soc_pcm_close(struct snd_pcm_substream *substream)
753{
754 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
755
756 snd_soc_dpcm_mutex_lock(rtd);
757 __soc_pcm_close(rtd, substream);
758 snd_soc_dpcm_mutex_unlock(rtd);
759 return 0;
760}
761
762static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
763{
764 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
765 struct snd_pcm_hardware *hw = &substream->runtime->hw;
766 const char *name_cpu = soc_cpu_dai_name(rtd);
767 const char *name_codec = soc_codec_dai_name(rtd);
768 const char *err_msg;
769 struct device *dev = rtd->dev;
770
771 err_msg = "rates";
772 if (!hw->rates)
773 goto config_err;
774
775 err_msg = "formats";
776 if (!hw->formats)
777 goto config_err;
778
779 err_msg = "channels";
780 if (!hw->channels_min || !hw->channels_max ||
781 hw->channels_min > hw->channels_max)
782 goto config_err;
783
784 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
785 name_cpu);
786 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
787 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
788 hw->channels_max);
789 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
790 hw->rate_max);
791
792 return 0;
793
794config_err:
795 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
796 name_codec, name_cpu, err_msg);
797 return -EINVAL;
798}
799
800/*
801 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
802 * then initialized and any private data can be allocated. This also calls
803 * startup for the cpu DAI, component, machine and codec DAI.
804 */
805static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
806 struct snd_pcm_substream *substream)
807{
808 struct snd_soc_component *component;
809 struct snd_soc_dai *dai;
810 int i, ret = 0;
811
812 snd_soc_dpcm_mutex_assert_held(rtd);
813
814 for_each_rtd_components(rtd, i, component)
815 pinctrl_pm_select_default_state(component->dev);
816
817 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
818 if (ret < 0)
819 goto err;
820
821 ret = soc_pcm_components_open(substream);
822 if (ret < 0)
823 goto err;
824
825 ret = snd_soc_link_startup(substream);
826 if (ret < 0)
827 goto err;
828
829 /* startup the audio subsystem */
830 for_each_rtd_dais(rtd, i, dai) {
831 ret = snd_soc_dai_startup(dai, substream);
832 if (ret < 0)
833 goto err;
834 }
835
836 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
837 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
838 goto dynamic;
839
840 /* Check that the codec and cpu DAIs are compatible */
841 soc_pcm_init_runtime_hw(substream);
842
843 soc_pcm_update_symmetry(substream);
844
845 ret = soc_hw_sanity_check(substream);
846 if (ret < 0)
847 goto err;
848
849 soc_pcm_apply_msb(substream);
850
851 /* Symmetry only applies if we've already got an active stream. */
852 for_each_rtd_dais(rtd, i, dai) {
853 ret = soc_pcm_apply_symmetry(substream, dai);
854 if (ret != 0)
855 goto err;
856 }
857dynamic:
858 snd_soc_runtime_activate(rtd, substream->stream);
859 ret = 0;
860err:
861 if (ret < 0)
862 soc_pcm_clean(rtd, substream, 1);
863
864 return soc_pcm_ret(rtd, ret);
865}
866
867/* PCM open ops for non-DPCM streams */
868static int soc_pcm_open(struct snd_pcm_substream *substream)
869{
870 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
871 int ret;
872
873 snd_soc_dpcm_mutex_lock(rtd);
874 ret = __soc_pcm_open(rtd, substream);
875 snd_soc_dpcm_mutex_unlock(rtd);
876 return ret;
877}
878
879/*
880 * Called by ALSA when the PCM substream is prepared, can set format, sample
881 * rate, etc. This function is non atomic and can be called multiple times,
882 * it can refer to the runtime info.
883 */
884static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
885 struct snd_pcm_substream *substream)
886{
887 struct snd_soc_dai *dai;
888 int i, ret = 0;
889
890 snd_soc_dpcm_mutex_assert_held(rtd);
891
892 ret = snd_soc_link_prepare(substream);
893 if (ret < 0)
894 goto out;
895
896 ret = snd_soc_pcm_component_prepare(substream);
897 if (ret < 0)
898 goto out;
899
900 ret = snd_soc_pcm_dai_prepare(substream);
901 if (ret < 0)
902 goto out;
903
904 /* cancel any delayed stream shutdown that is pending */
905 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
906 rtd->pop_wait) {
907 rtd->pop_wait = 0;
908 cancel_delayed_work(&rtd->delayed_work);
909 }
910
911 snd_soc_dapm_stream_event(rtd, substream->stream,
912 SND_SOC_DAPM_STREAM_START);
913
914 for_each_rtd_dais(rtd, i, dai)
915 snd_soc_dai_digital_mute(dai, 0, substream->stream);
916
917out:
918 return soc_pcm_ret(rtd, ret);
919}
920
921/* PCM prepare ops for non-DPCM streams */
922static int soc_pcm_prepare(struct snd_pcm_substream *substream)
923{
924 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
925 int ret;
926
927 snd_soc_dpcm_mutex_lock(rtd);
928 ret = __soc_pcm_prepare(rtd, substream);
929 snd_soc_dpcm_mutex_unlock(rtd);
930 return ret;
931}
932
933static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
934 unsigned int mask)
935{
936 struct snd_interval *interval;
937 int channels = hweight_long(mask);
938
939 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
940 interval->min = channels;
941 interval->max = channels;
942}
943
944static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
945 struct snd_pcm_substream *substream, int rollback)
946{
947 struct snd_soc_dai *dai;
948 int i;
949
950 snd_soc_dpcm_mutex_assert_held(rtd);
951
952 /* run the stream event */
953 snd_soc_dapm_stream_stop(rtd, substream->stream);
954
955 /* free any machine hw params */
956 snd_soc_link_hw_free(substream, rollback);
957
958 /* free any component resources */
959 snd_soc_pcm_component_hw_free(substream, rollback);
960
961 /* now free hw params for the DAIs */
962 for_each_rtd_dais(rtd, i, dai)
963 if (snd_soc_dai_stream_valid(dai, substream->stream))
964 snd_soc_dai_hw_free(dai, substream, rollback);
965
966 return 0;
967}
968
969/*
970 * Frees resources allocated by hw_params, can be called multiple times
971 */
972static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
973 struct snd_pcm_substream *substream)
974{
975 return soc_pcm_hw_clean(rtd, substream, 0);
976}
977
978/* hw_free PCM ops for non-DPCM streams */
979static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
980{
981 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
982 int ret;
983
984 snd_soc_dpcm_mutex_lock(rtd);
985 ret = __soc_pcm_hw_free(rtd, substream);
986 snd_soc_dpcm_mutex_unlock(rtd);
987 return ret;
988}
989
990/*
991 * Called by ALSA when the hardware params are set by application. This
992 * function can also be called multiple times and can allocate buffers
993 * (using snd_pcm_lib_* ). It's non-atomic.
994 */
995static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
996 struct snd_pcm_substream *substream,
997 struct snd_pcm_hw_params *params)
998{
999 struct snd_soc_dai *cpu_dai;
1000 struct snd_soc_dai *codec_dai;
1001 int i, ret = 0;
1002
1003 snd_soc_dpcm_mutex_assert_held(rtd);
1004
1005 ret = soc_pcm_params_symmetry(substream, params);
1006 if (ret)
1007 goto out;
1008
1009 ret = snd_soc_link_hw_params(substream, params);
1010 if (ret < 0)
1011 goto out;
1012
1013 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1014 struct snd_pcm_hw_params codec_params;
1015
1016 /*
1017 * Skip CODECs which don't support the current stream type,
1018 * the idea being that if a CODEC is not used for the currently
1019 * set up transfer direction, it should not need to be
1020 * configured, especially since the configuration used might
1021 * not even be supported by that CODEC. There may be cases
1022 * however where a CODEC needs to be set up although it is
1023 * actually not being used for the transfer, e.g. if a
1024 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1025 * for the DAI link including a playback-only CODEC.
1026 * If this becomes necessary, we will have to augment the
1027 * machine driver setup with information on how to act, so
1028 * we can do the right thing here.
1029 */
1030 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1031 continue;
1032
1033 /* copy params for each codec */
1034 codec_params = *params;
1035
1036 /* fixup params based on TDM slot masks */
1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1038 codec_dai->tx_mask)
1039 soc_pcm_codec_params_fixup(&codec_params,
1040 codec_dai->tx_mask);
1041
1042 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
1043 codec_dai->rx_mask)
1044 soc_pcm_codec_params_fixup(&codec_params,
1045 codec_dai->rx_mask);
1046
1047 ret = snd_soc_dai_hw_params(codec_dai, substream,
1048 &codec_params);
1049 if(ret < 0)
1050 goto out;
1051
1052 soc_pcm_set_dai_params(codec_dai, &codec_params);
1053 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
1054 }
1055
1056 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1057 /*
1058 * Skip CPUs which don't support the current stream
1059 * type. See soc_pcm_init_runtime_hw() for more details
1060 */
1061 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1062 continue;
1063
1064 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
1065 if (ret < 0)
1066 goto out;
1067
1068 /* store the parameters for each DAI */
1069 soc_pcm_set_dai_params(cpu_dai, params);
1070 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1071 }
1072
1073 ret = snd_soc_pcm_component_hw_params(substream, params);
1074out:
1075 if (ret < 0)
1076 soc_pcm_hw_clean(rtd, substream, 1);
1077
1078 return soc_pcm_ret(rtd, ret);
1079}
1080
1081/* hw_params PCM ops for non-DPCM streams */
1082static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1083 struct snd_pcm_hw_params *params)
1084{
1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1086 int ret;
1087
1088 snd_soc_dpcm_mutex_lock(rtd);
1089 ret = __soc_pcm_hw_params(rtd, substream, params);
1090 snd_soc_dpcm_mutex_unlock(rtd);
1091 return ret;
1092}
1093
1094static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1095{
1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1097 int ret = -EINVAL, _ret = 0;
1098 int rollback = 0;
1099
1100 switch (cmd) {
1101 case SNDRV_PCM_TRIGGER_START:
1102 case SNDRV_PCM_TRIGGER_RESUME:
1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1104 ret = snd_soc_link_trigger(substream, cmd, 0);
1105 if (ret < 0)
1106 goto start_err;
1107
1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1109 if (ret < 0)
1110 goto start_err;
1111
1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1113start_err:
1114 if (ret < 0)
1115 rollback = 1;
1116 }
1117
1118 if (rollback) {
1119 _ret = ret;
1120 switch (cmd) {
1121 case SNDRV_PCM_TRIGGER_START:
1122 cmd = SNDRV_PCM_TRIGGER_STOP;
1123 break;
1124 case SNDRV_PCM_TRIGGER_RESUME:
1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1126 break;
1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1129 break;
1130 }
1131 }
1132
1133 switch (cmd) {
1134 case SNDRV_PCM_TRIGGER_STOP:
1135 case SNDRV_PCM_TRIGGER_SUSPEND:
1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1137 if (rtd->dai_link->stop_dma_first) {
1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1139 if (ret < 0)
1140 break;
1141
1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1143 if (ret < 0)
1144 break;
1145 } else {
1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1147 if (ret < 0)
1148 break;
1149
1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1151 if (ret < 0)
1152 break;
1153 }
1154 ret = snd_soc_link_trigger(substream, cmd, rollback);
1155 break;
1156 }
1157
1158 if (_ret)
1159 ret = _ret;
1160
1161 return ret;
1162}
1163
1164/*
1165 * soc level wrapper for pointer callback
1166 * If cpu_dai, codec_dai, component driver has the delay callback, then
1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1168 */
1169static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1170{
1171 struct snd_pcm_runtime *runtime = substream->runtime;
1172 snd_pcm_uframes_t offset = 0;
1173 snd_pcm_sframes_t codec_delay = 0;
1174 snd_pcm_sframes_t cpu_delay = 0;
1175
1176 offset = snd_soc_pcm_component_pointer(substream);
1177
1178 /* should be called *after* snd_soc_pcm_component_pointer() */
1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1181
1182 runtime->delay = cpu_delay + codec_delay;
1183
1184 return offset;
1185}
1186
1187/* connect a FE and BE */
1188static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1189 struct snd_soc_pcm_runtime *be, int stream)
1190{
1191 struct snd_pcm_substream *fe_substream;
1192 struct snd_pcm_substream *be_substream;
1193 struct snd_soc_dpcm *dpcm;
1194
1195 snd_soc_dpcm_mutex_assert_held(fe);
1196
1197 /* only add new dpcms */
1198 for_each_dpcm_be(fe, stream, dpcm) {
1199 if (dpcm->be == be && dpcm->fe == fe)
1200 return 0;
1201 }
1202
1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1204 be_substream = snd_soc_dpcm_get_substream(be, stream);
1205
1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1208 __func__);
1209 return -EINVAL;
1210 }
1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1212 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1213 be_substream->pcm->nonatomic = 1;
1214 }
1215
1216 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1217 if (!dpcm)
1218 return -ENOMEM;
1219
1220 dpcm->be = be;
1221 dpcm->fe = fe;
1222 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1223 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1224 snd_soc_dpcm_stream_lock_irq(fe, stream);
1225 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1226 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1227 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1228
1229 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1230 stream ? "capture" : "playback", fe->dai_link->name,
1231 stream ? "<-" : "->", be->dai_link->name);
1232
1233 dpcm_create_debugfs_state(dpcm, stream);
1234
1235 return 1;
1236}
1237
1238/* reparent a BE onto another FE */
1239static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1240 struct snd_soc_pcm_runtime *be, int stream)
1241{
1242 struct snd_soc_dpcm *dpcm;
1243 struct snd_pcm_substream *fe_substream, *be_substream;
1244
1245 /* reparent if BE is connected to other FEs */
1246 if (!be->dpcm[stream].users)
1247 return;
1248
1249 be_substream = snd_soc_dpcm_get_substream(be, stream);
1250 if (!be_substream)
1251 return;
1252
1253 for_each_dpcm_fe(be, stream, dpcm) {
1254 if (dpcm->fe == fe)
1255 continue;
1256
1257 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1258 stream ? "capture" : "playback",
1259 dpcm->fe->dai_link->name,
1260 stream ? "<-" : "->", dpcm->be->dai_link->name);
1261
1262 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1263 be_substream->runtime = fe_substream->runtime;
1264 break;
1265 }
1266}
1267
1268/* disconnect a BE and FE */
1269void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1270{
1271 struct snd_soc_dpcm *dpcm, *d;
1272 LIST_HEAD(deleted_dpcms);
1273
1274 snd_soc_dpcm_mutex_assert_held(fe);
1275
1276 snd_soc_dpcm_stream_lock_irq(fe, stream);
1277 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1278 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1279 stream ? "capture" : "playback",
1280 dpcm->be->dai_link->name);
1281
1282 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1283 continue;
1284
1285 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1286 stream ? "capture" : "playback", fe->dai_link->name,
1287 stream ? "<-" : "->", dpcm->be->dai_link->name);
1288
1289 /* BEs still alive need new FE */
1290 dpcm_be_reparent(fe, dpcm->be, stream);
1291
1292 list_del(&dpcm->list_be);
1293 list_move(&dpcm->list_fe, &deleted_dpcms);
1294 }
1295 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1296
1297 while (!list_empty(&deleted_dpcms)) {
1298 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1299 list_fe);
1300 list_del(&dpcm->list_fe);
1301 dpcm_remove_debugfs_state(dpcm);
1302 kfree(dpcm);
1303 }
1304}
1305
1306/* get BE for DAI widget and stream */
1307static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1308 struct snd_soc_dapm_widget *widget, int stream)
1309{
1310 struct snd_soc_pcm_runtime *be;
1311 struct snd_soc_dapm_widget *w;
1312 struct snd_soc_dai *dai;
1313 int i;
1314
1315 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1316
1317 for_each_card_rtds(card, be) {
1318
1319 if (!be->dai_link->no_pcm)
1320 continue;
1321
1322 if (!snd_soc_dpcm_get_substream(be, stream))
1323 continue;
1324
1325 for_each_rtd_dais(be, i, dai) {
1326 w = snd_soc_dai_get_widget(dai, stream);
1327
1328 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1329 w ? w->name : "(not set)");
1330
1331 if (w == widget)
1332 return be;
1333 }
1334 }
1335
1336 /* Widget provided is not a BE */
1337 return NULL;
1338}
1339
1340static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1341 struct snd_soc_dapm_widget *widget)
1342{
1343 struct snd_soc_dapm_widget *w;
1344 int i;
1345
1346 for_each_dapm_widgets(list, i, w)
1347 if (widget == w)
1348 return 1;
1349
1350 return 0;
1351}
1352
1353bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1354{
1355 struct snd_soc_card *card = widget->dapm->card;
1356 struct snd_soc_pcm_runtime *rtd;
1357 int stream;
1358
1359 /* adjust dir to stream */
1360 if (dir == SND_SOC_DAPM_DIR_OUT)
1361 stream = SNDRV_PCM_STREAM_PLAYBACK;
1362 else
1363 stream = SNDRV_PCM_STREAM_CAPTURE;
1364
1365 rtd = dpcm_get_be(card, widget, stream);
1366 if (rtd)
1367 return true;
1368
1369 return false;
1370}
1371EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1372
1373int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1374 int stream, struct snd_soc_dapm_widget_list **list)
1375{
1376 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1377 int paths;
1378
1379 if (fe->dai_link->num_cpus > 1) {
1380 dev_err(fe->dev,
1381 "%s doesn't support Multi CPU yet\n", __func__);
1382 return -EINVAL;
1383 }
1384
1385 /* get number of valid DAI paths and their widgets */
1386 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1387 fe->card->component_chaining ?
1388 NULL : dpcm_end_walk_at_be);
1389
1390 if (paths > 0)
1391 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1392 stream ? "capture" : "playback");
1393 else if (paths == 0)
1394 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1395 stream ? "capture" : "playback");
1396
1397 return paths;
1398}
1399
1400void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1401{
1402 snd_soc_dapm_dai_free_widgets(list);
1403}
1404
1405static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1406 struct snd_soc_dapm_widget_list *list)
1407{
1408 struct snd_soc_dai *dai;
1409 unsigned int i;
1410
1411 /* is there a valid DAI widget for this BE */
1412 for_each_rtd_dais(dpcm->be, i, dai) {
1413 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1414
1415 /*
1416 * The BE is pruned only if none of the dai
1417 * widgets are in the active list.
1418 */
1419 if (widget && widget_in_list(list, widget))
1420 return true;
1421 }
1422
1423 return false;
1424}
1425
1426static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1427 struct snd_soc_dapm_widget_list **list_)
1428{
1429 struct snd_soc_dpcm *dpcm;
1430 int prune = 0;
1431
1432 /* Destroy any old FE <--> BE connections */
1433 for_each_dpcm_be(fe, stream, dpcm) {
1434 if (dpcm_be_is_active(dpcm, stream, *list_))
1435 continue;
1436
1437 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1438 stream ? "capture" : "playback",
1439 dpcm->be->dai_link->name, fe->dai_link->name);
1440 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1441 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1442 prune++;
1443 }
1444
1445 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1446 return prune;
1447}
1448
1449static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1450 struct snd_soc_dapm_widget_list **list_)
1451{
1452 struct snd_soc_card *card = fe->card;
1453 struct snd_soc_dapm_widget_list *list = *list_;
1454 struct snd_soc_pcm_runtime *be;
1455 struct snd_soc_dapm_widget *widget;
1456 int i, new = 0, err;
1457
1458 /* don't connect if FE is not running */
1459 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1460 return new;
1461
1462 /* Create any new FE <--> BE connections */
1463 for_each_dapm_widgets(list, i, widget) {
1464
1465 switch (widget->id) {
1466 case snd_soc_dapm_dai_in:
1467 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1468 continue;
1469 break;
1470 case snd_soc_dapm_dai_out:
1471 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1472 continue;
1473 break;
1474 default:
1475 continue;
1476 }
1477
1478 /* is there a valid BE rtd for this widget */
1479 be = dpcm_get_be(card, widget, stream);
1480 if (!be) {
1481 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1482 widget->name);
1483 continue;
1484 }
1485
1486 /*
1487 * Filter for systems with 'component_chaining' enabled.
1488 * This helps to avoid unnecessary re-configuration of an
1489 * already active BE on such systems.
1490 */
1491 if (fe->card->component_chaining &&
1492 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1493 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1494 continue;
1495
1496 /* newly connected FE and BE */
1497 err = dpcm_be_connect(fe, be, stream);
1498 if (err < 0) {
1499 dev_err(fe->dev, "ASoC: can't connect %s\n",
1500 widget->name);
1501 break;
1502 } else if (err == 0) /* already connected */
1503 continue;
1504
1505 /* new */
1506 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1507 new++;
1508 }
1509
1510 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1511 return new;
1512}
1513
1514/*
1515 * Find the corresponding BE DAIs that source or sink audio to this
1516 * FE substream.
1517 */
1518int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1519 int stream, struct snd_soc_dapm_widget_list **list, int new)
1520{
1521 if (new)
1522 return dpcm_add_paths(fe, stream, list);
1523 else
1524 return dpcm_prune_paths(fe, stream, list);
1525}
1526
1527void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1528{
1529 struct snd_soc_dpcm *dpcm;
1530
1531 for_each_dpcm_be(fe, stream, dpcm)
1532 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1533}
1534
1535void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1536 int do_hw_free, struct snd_soc_dpcm *last)
1537{
1538 struct snd_soc_dpcm *dpcm;
1539
1540 /* disable any enabled and non active backends */
1541 for_each_dpcm_be(fe, stream, dpcm) {
1542 struct snd_soc_pcm_runtime *be = dpcm->be;
1543 struct snd_pcm_substream *be_substream =
1544 snd_soc_dpcm_get_substream(be, stream);
1545
1546 if (dpcm == last)
1547 return;
1548
1549 /* is this op for this BE ? */
1550 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1551 continue;
1552
1553 if (be->dpcm[stream].users == 0) {
1554 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1555 stream ? "capture" : "playback",
1556 be->dpcm[stream].state);
1557 continue;
1558 }
1559
1560 if (--be->dpcm[stream].users != 0)
1561 continue;
1562
1563 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1564 if (!do_hw_free)
1565 continue;
1566
1567 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1568 __soc_pcm_hw_free(be, be_substream);
1569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1570 }
1571 }
1572
1573 __soc_pcm_close(be, be_substream);
1574 be_substream->runtime = NULL;
1575 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1576 }
1577}
1578
1579int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1580{
1581 struct snd_soc_pcm_runtime *be;
1582 struct snd_soc_dpcm *dpcm;
1583 int err, count = 0;
1584
1585 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1586 for_each_dpcm_be(fe, stream, dpcm) {
1587 struct snd_pcm_substream *be_substream;
1588
1589 be = dpcm->be;
1590 be_substream = snd_soc_dpcm_get_substream(be, stream);
1591
1592 if (!be_substream) {
1593 dev_err(be->dev, "ASoC: no backend %s stream\n",
1594 stream ? "capture" : "playback");
1595 continue;
1596 }
1597
1598 /* is this op for this BE ? */
1599 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1600 continue;
1601
1602 /* first time the dpcm is open ? */
1603 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1604 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1605 stream ? "capture" : "playback",
1606 be->dpcm[stream].state);
1607 continue;
1608 }
1609
1610 if (be->dpcm[stream].users++ != 0)
1611 continue;
1612
1613 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1615 continue;
1616
1617 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1618 stream ? "capture" : "playback", be->dai_link->name);
1619
1620 be_substream->runtime = be->dpcm[stream].runtime;
1621 err = __soc_pcm_open(be, be_substream);
1622 if (err < 0) {
1623 be->dpcm[stream].users--;
1624 if (be->dpcm[stream].users < 0)
1625 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1626 stream ? "capture" : "playback",
1627 be->dpcm[stream].state);
1628
1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1630 goto unwind;
1631 }
1632 be->dpcm[stream].be_start = 0;
1633 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1634 count++;
1635 }
1636
1637 return count;
1638
1639unwind:
1640 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1641
1642 return soc_pcm_ret(fe, err);
1643}
1644
1645static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1646{
1647 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1648 struct snd_pcm_runtime *runtime = substream->runtime;
1649 struct snd_pcm_hardware *hw = &runtime->hw;
1650 struct snd_soc_dai *dai;
1651 int stream = substream->stream;
1652 int i;
1653
1654 soc_pcm_hw_init(hw);
1655
1656 for_each_rtd_cpu_dais(fe, i, dai) {
1657 struct snd_soc_pcm_stream *cpu_stream;
1658
1659 /*
1660 * Skip CPUs which don't support the current stream
1661 * type. See soc_pcm_init_runtime_hw() for more details
1662 */
1663 if (!snd_soc_dai_stream_valid(dai, stream))
1664 continue;
1665
1666 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1667
1668 soc_pcm_hw_update_rate(hw, cpu_stream);
1669 soc_pcm_hw_update_chan(hw, cpu_stream);
1670 soc_pcm_hw_update_format(hw, cpu_stream);
1671 }
1672
1673}
1674
1675static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1676{
1677 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1678 struct snd_pcm_runtime *runtime = substream->runtime;
1679 struct snd_pcm_hardware *hw = &runtime->hw;
1680 struct snd_soc_dpcm *dpcm;
1681 struct snd_soc_dai *dai;
1682 int stream = substream->stream;
1683
1684 if (!fe->dai_link->dpcm_merged_format)
1685 return;
1686
1687 /*
1688 * It returns merged BE codec format
1689 * if FE want to use it (= dpcm_merged_format)
1690 */
1691
1692 for_each_dpcm_be(fe, stream, dpcm) {
1693 struct snd_soc_pcm_runtime *be = dpcm->be;
1694 struct snd_soc_pcm_stream *codec_stream;
1695 int i;
1696
1697 for_each_rtd_codec_dais(be, i, dai) {
1698 /*
1699 * Skip CODECs which don't support the current stream
1700 * type. See soc_pcm_init_runtime_hw() for more details
1701 */
1702 if (!snd_soc_dai_stream_valid(dai, stream))
1703 continue;
1704
1705 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1706
1707 soc_pcm_hw_update_format(hw, codec_stream);
1708 }
1709 }
1710}
1711
1712static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1713{
1714 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1715 struct snd_pcm_runtime *runtime = substream->runtime;
1716 struct snd_pcm_hardware *hw = &runtime->hw;
1717 struct snd_soc_dpcm *dpcm;
1718 int stream = substream->stream;
1719
1720 if (!fe->dai_link->dpcm_merged_chan)
1721 return;
1722
1723 /*
1724 * It returns merged BE codec channel;
1725 * if FE want to use it (= dpcm_merged_chan)
1726 */
1727
1728 for_each_dpcm_be(fe, stream, dpcm) {
1729 struct snd_soc_pcm_runtime *be = dpcm->be;
1730 struct snd_soc_pcm_stream *cpu_stream;
1731 struct snd_soc_dai *dai;
1732 int i;
1733
1734 for_each_rtd_cpu_dais(be, i, dai) {
1735 /*
1736 * Skip CPUs which don't support the current stream
1737 * type. See soc_pcm_init_runtime_hw() for more details
1738 */
1739 if (!snd_soc_dai_stream_valid(dai, stream))
1740 continue;
1741
1742 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1743
1744 soc_pcm_hw_update_chan(hw, cpu_stream);
1745 }
1746
1747 /*
1748 * chan min/max cannot be enforced if there are multiple CODEC
1749 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1750 */
1751 if (be->dai_link->num_codecs == 1) {
1752 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1753 asoc_rtd_to_codec(be, 0), stream);
1754
1755 soc_pcm_hw_update_chan(hw, codec_stream);
1756 }
1757 }
1758}
1759
1760static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1761{
1762 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1763 struct snd_pcm_runtime *runtime = substream->runtime;
1764 struct snd_pcm_hardware *hw = &runtime->hw;
1765 struct snd_soc_dpcm *dpcm;
1766 int stream = substream->stream;
1767
1768 if (!fe->dai_link->dpcm_merged_rate)
1769 return;
1770
1771 /*
1772 * It returns merged BE codec channel;
1773 * if FE want to use it (= dpcm_merged_chan)
1774 */
1775
1776 for_each_dpcm_be(fe, stream, dpcm) {
1777 struct snd_soc_pcm_runtime *be = dpcm->be;
1778 struct snd_soc_pcm_stream *pcm;
1779 struct snd_soc_dai *dai;
1780 int i;
1781
1782 for_each_rtd_dais(be, i, dai) {
1783 /*
1784 * Skip DAIs which don't support the current stream
1785 * type. See soc_pcm_init_runtime_hw() for more details
1786 */
1787 if (!snd_soc_dai_stream_valid(dai, stream))
1788 continue;
1789
1790 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1791
1792 soc_pcm_hw_update_rate(hw, pcm);
1793 }
1794 }
1795}
1796
1797static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1798 int stream)
1799{
1800 struct snd_soc_dpcm *dpcm;
1801 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1802 struct snd_soc_dai *fe_cpu_dai;
1803 int err = 0;
1804 int i;
1805
1806 /* apply symmetry for FE */
1807 soc_pcm_update_symmetry(fe_substream);
1808
1809 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1810 /* Symmetry only applies if we've got an active stream. */
1811 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1812 if (err < 0)
1813 goto error;
1814 }
1815
1816 /* apply symmetry for BE */
1817 for_each_dpcm_be(fe, stream, dpcm) {
1818 struct snd_soc_pcm_runtime *be = dpcm->be;
1819 struct snd_pcm_substream *be_substream =
1820 snd_soc_dpcm_get_substream(be, stream);
1821 struct snd_soc_pcm_runtime *rtd;
1822 struct snd_soc_dai *dai;
1823
1824 /* A backend may not have the requested substream */
1825 if (!be_substream)
1826 continue;
1827
1828 rtd = asoc_substream_to_rtd(be_substream);
1829 if (rtd->dai_link->be_hw_params_fixup)
1830 continue;
1831
1832 soc_pcm_update_symmetry(be_substream);
1833
1834 /* Symmetry only applies if we've got an active stream. */
1835 for_each_rtd_dais(rtd, i, dai) {
1836 err = soc_pcm_apply_symmetry(fe_substream, dai);
1837 if (err < 0)
1838 goto error;
1839 }
1840 }
1841error:
1842 return soc_pcm_ret(fe, err);
1843}
1844
1845static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1846{
1847 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1848 int stream = fe_substream->stream, ret = 0;
1849
1850 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1851
1852 ret = dpcm_be_dai_startup(fe, stream);
1853 if (ret < 0)
1854 goto be_err;
1855
1856 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1857
1858 /* start the DAI frontend */
1859 ret = __soc_pcm_open(fe, fe_substream);
1860 if (ret < 0)
1861 goto unwind;
1862
1863 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1864
1865 dpcm_runtime_setup_fe(fe_substream);
1866
1867 dpcm_runtime_setup_be_format(fe_substream);
1868 dpcm_runtime_setup_be_chan(fe_substream);
1869 dpcm_runtime_setup_be_rate(fe_substream);
1870
1871 ret = dpcm_apply_symmetry(fe_substream, stream);
1872
1873unwind:
1874 if (ret < 0)
1875 dpcm_be_dai_startup_unwind(fe, stream);
1876be_err:
1877 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1878
1879 return soc_pcm_ret(fe, ret);
1880}
1881
1882static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1883{
1884 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1885 int stream = substream->stream;
1886
1887 snd_soc_dpcm_mutex_assert_held(fe);
1888
1889 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1890
1891 /* shutdown the BEs */
1892 dpcm_be_dai_shutdown(fe, stream);
1893
1894 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1895
1896 /* now shutdown the frontend */
1897 __soc_pcm_close(fe, substream);
1898
1899 /* run the stream stop event */
1900 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1901
1902 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1903 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1904 return 0;
1905}
1906
1907void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1908{
1909 struct snd_soc_dpcm *dpcm;
1910
1911 /* only hw_params backends that are either sinks or sources
1912 * to this frontend DAI */
1913 for_each_dpcm_be(fe, stream, dpcm) {
1914
1915 struct snd_soc_pcm_runtime *be = dpcm->be;
1916 struct snd_pcm_substream *be_substream =
1917 snd_soc_dpcm_get_substream(be, stream);
1918
1919 /* is this op for this BE ? */
1920 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1921 continue;
1922
1923 /* only free hw when no longer used - check all FEs */
1924 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1925 continue;
1926
1927 /* do not free hw if this BE is used by other FE */
1928 if (be->dpcm[stream].users > 1)
1929 continue;
1930
1931 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1932 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1937 continue;
1938
1939 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1940 be->dai_link->name);
1941
1942 __soc_pcm_hw_free(be, be_substream);
1943
1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1945 }
1946}
1947
1948static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1949{
1950 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1951 int stream = substream->stream;
1952
1953 snd_soc_dpcm_mutex_lock(fe);
1954 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1955
1956 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1957
1958 /* call hw_free on the frontend */
1959 soc_pcm_hw_clean(fe, substream, 0);
1960
1961 /* only hw_params backends that are either sinks or sources
1962 * to this frontend DAI */
1963 dpcm_be_dai_hw_free(fe, stream);
1964
1965 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1966 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1967
1968 snd_soc_dpcm_mutex_unlock(fe);
1969 return 0;
1970}
1971
1972int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1973{
1974 struct snd_soc_pcm_runtime *be;
1975 struct snd_pcm_substream *be_substream;
1976 struct snd_soc_dpcm *dpcm;
1977 int ret;
1978
1979 for_each_dpcm_be(fe, stream, dpcm) {
1980 struct snd_pcm_hw_params hw_params;
1981
1982 be = dpcm->be;
1983 be_substream = snd_soc_dpcm_get_substream(be, stream);
1984
1985 /* is this op for this BE ? */
1986 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1987 continue;
1988
1989 /* copy params for each dpcm */
1990 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
1991 sizeof(struct snd_pcm_hw_params));
1992
1993 /* perform any hw_params fixups */
1994 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
1995 if (ret < 0)
1996 goto unwind;
1997
1998 /* copy the fixed-up hw params for BE dai */
1999 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2000 sizeof(struct snd_pcm_hw_params));
2001
2002 /* only allow hw_params() if no connected FEs are running */
2003 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2004 continue;
2005
2006 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2007 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2008 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2009 continue;
2010
2011 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2012 be->dai_link->name);
2013
2014 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2015 if (ret < 0)
2016 goto unwind;
2017
2018 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2019 }
2020 return 0;
2021
2022unwind:
2023 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2024 __func__, be->dai_link->name, ret);
2025
2026 /* disable any enabled and non active backends */
2027 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2028 be = dpcm->be;
2029 be_substream = snd_soc_dpcm_get_substream(be, stream);
2030
2031 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2032 continue;
2033
2034 /* only allow hw_free() if no connected FEs are running */
2035 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2036 continue;
2037
2038 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2039 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2040 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2042 continue;
2043
2044 __soc_pcm_hw_free(be, be_substream);
2045 }
2046
2047 return ret;
2048}
2049
2050static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2051 struct snd_pcm_hw_params *params)
2052{
2053 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2054 int ret, stream = substream->stream;
2055
2056 snd_soc_dpcm_mutex_lock(fe);
2057 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2058
2059 memcpy(&fe->dpcm[stream].hw_params, params,
2060 sizeof(struct snd_pcm_hw_params));
2061 ret = dpcm_be_dai_hw_params(fe, stream);
2062 if (ret < 0)
2063 goto out;
2064
2065 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2066 fe->dai_link->name, params_rate(params),
2067 params_channels(params), params_format(params));
2068
2069 /* call hw_params on the frontend */
2070 ret = __soc_pcm_hw_params(fe, substream, params);
2071 if (ret < 0)
2072 dpcm_be_dai_hw_free(fe, stream);
2073 else
2074 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2075
2076out:
2077 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2078 snd_soc_dpcm_mutex_unlock(fe);
2079
2080 return soc_pcm_ret(fe, ret);
2081}
2082
2083int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2084 int cmd)
2085{
2086 struct snd_soc_pcm_runtime *be;
2087 bool pause_stop_transition;
2088 struct snd_soc_dpcm *dpcm;
2089 unsigned long flags;
2090 int ret = 0;
2091
2092 for_each_dpcm_be(fe, stream, dpcm) {
2093 struct snd_pcm_substream *be_substream;
2094
2095 be = dpcm->be;
2096 be_substream = snd_soc_dpcm_get_substream(be, stream);
2097
2098 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2099
2100 /* is this op for this BE ? */
2101 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2102 goto next;
2103
2104 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2105 be->dai_link->name, cmd);
2106
2107 switch (cmd) {
2108 case SNDRV_PCM_TRIGGER_START:
2109 if (!be->dpcm[stream].be_start &&
2110 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2112 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2113 goto next;
2114
2115 be->dpcm[stream].be_start++;
2116 if (be->dpcm[stream].be_start != 1)
2117 goto next;
2118
2119 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2120 ret = soc_pcm_trigger(be_substream,
2121 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2122 else
2123 ret = soc_pcm_trigger(be_substream,
2124 SNDRV_PCM_TRIGGER_START);
2125 if (ret) {
2126 be->dpcm[stream].be_start--;
2127 goto next;
2128 }
2129
2130 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2131 break;
2132 case SNDRV_PCM_TRIGGER_RESUME:
2133 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2134 goto next;
2135
2136 be->dpcm[stream].be_start++;
2137 if (be->dpcm[stream].be_start != 1)
2138 goto next;
2139
2140 ret = soc_pcm_trigger(be_substream, cmd);
2141 if (ret) {
2142 be->dpcm[stream].be_start--;
2143 goto next;
2144 }
2145
2146 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2147 break;
2148 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2149 if (!be->dpcm[stream].be_start &&
2150 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2152 goto next;
2153
2154 fe->dpcm[stream].fe_pause = false;
2155 be->dpcm[stream].be_pause--;
2156
2157 be->dpcm[stream].be_start++;
2158 if (be->dpcm[stream].be_start != 1)
2159 goto next;
2160
2161 ret = soc_pcm_trigger(be_substream, cmd);
2162 if (ret) {
2163 be->dpcm[stream].be_start--;
2164 goto next;
2165 }
2166
2167 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2168 break;
2169 case SNDRV_PCM_TRIGGER_STOP:
2170 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2171 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2172 goto next;
2173
2174 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2175 be->dpcm[stream].be_start--;
2176
2177 if (be->dpcm[stream].be_start != 0)
2178 goto next;
2179
2180 pause_stop_transition = false;
2181 if (fe->dpcm[stream].fe_pause) {
2182 pause_stop_transition = true;
2183 fe->dpcm[stream].fe_pause = false;
2184 be->dpcm[stream].be_pause--;
2185 }
2186
2187 if (be->dpcm[stream].be_pause != 0)
2188 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2189 else
2190 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2191
2192 if (ret) {
2193 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2194 be->dpcm[stream].be_start++;
2195 if (pause_stop_transition) {
2196 fe->dpcm[stream].fe_pause = true;
2197 be->dpcm[stream].be_pause++;
2198 }
2199 goto next;
2200 }
2201
2202 if (be->dpcm[stream].be_pause != 0)
2203 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2204 else
2205 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2206
2207 break;
2208 case SNDRV_PCM_TRIGGER_SUSPEND:
2209 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2210 goto next;
2211
2212 be->dpcm[stream].be_start--;
2213 if (be->dpcm[stream].be_start != 0)
2214 goto next;
2215
2216 ret = soc_pcm_trigger(be_substream, cmd);
2217 if (ret) {
2218 be->dpcm[stream].be_start++;
2219 goto next;
2220 }
2221
2222 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2223 break;
2224 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2225 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2226 goto next;
2227
2228 fe->dpcm[stream].fe_pause = true;
2229 be->dpcm[stream].be_pause++;
2230
2231 be->dpcm[stream].be_start--;
2232 if (be->dpcm[stream].be_start != 0)
2233 goto next;
2234
2235 ret = soc_pcm_trigger(be_substream, cmd);
2236 if (ret) {
2237 be->dpcm[stream].be_start++;
2238 goto next;
2239 }
2240
2241 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2242 break;
2243 }
2244next:
2245 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2246 if (ret)
2247 break;
2248 }
2249 return soc_pcm_ret(fe, ret);
2250}
2251EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2252
2253static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2254 int cmd, bool fe_first)
2255{
2256 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2257 int ret;
2258
2259 /* call trigger on the frontend before the backend. */
2260 if (fe_first) {
2261 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2262 fe->dai_link->name, cmd);
2263
2264 ret = soc_pcm_trigger(substream, cmd);
2265 if (ret < 0)
2266 return ret;
2267
2268 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2269 return ret;
2270 }
2271
2272 /* call trigger on the frontend after the backend. */
2273 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2274 if (ret < 0)
2275 return ret;
2276
2277 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2278 fe->dai_link->name, cmd);
2279
2280 ret = soc_pcm_trigger(substream, cmd);
2281
2282 return ret;
2283}
2284
2285static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2286{
2287 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2288 int stream = substream->stream;
2289 int ret = 0;
2290 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2291
2292 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2293
2294 switch (trigger) {
2295 case SND_SOC_DPCM_TRIGGER_PRE:
2296 switch (cmd) {
2297 case SNDRV_PCM_TRIGGER_START:
2298 case SNDRV_PCM_TRIGGER_RESUME:
2299 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2300 case SNDRV_PCM_TRIGGER_DRAIN:
2301 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2302 break;
2303 case SNDRV_PCM_TRIGGER_STOP:
2304 case SNDRV_PCM_TRIGGER_SUSPEND:
2305 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2306 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2307 break;
2308 default:
2309 ret = -EINVAL;
2310 break;
2311 }
2312 break;
2313 case SND_SOC_DPCM_TRIGGER_POST:
2314 switch (cmd) {
2315 case SNDRV_PCM_TRIGGER_START:
2316 case SNDRV_PCM_TRIGGER_RESUME:
2317 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2318 case SNDRV_PCM_TRIGGER_DRAIN:
2319 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2320 break;
2321 case SNDRV_PCM_TRIGGER_STOP:
2322 case SNDRV_PCM_TRIGGER_SUSPEND:
2323 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2324 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2325 break;
2326 default:
2327 ret = -EINVAL;
2328 break;
2329 }
2330 break;
2331 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2332 /* bespoke trigger() - handles both FE and BEs */
2333
2334 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2335 fe->dai_link->name, cmd);
2336
2337 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2338 break;
2339 default:
2340 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2341 fe->dai_link->name);
2342 ret = -EINVAL;
2343 goto out;
2344 }
2345
2346 if (ret < 0) {
2347 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2348 cmd, ret);
2349 goto out;
2350 }
2351
2352 switch (cmd) {
2353 case SNDRV_PCM_TRIGGER_START:
2354 case SNDRV_PCM_TRIGGER_RESUME:
2355 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2356 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2357 break;
2358 case SNDRV_PCM_TRIGGER_STOP:
2359 case SNDRV_PCM_TRIGGER_SUSPEND:
2360 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2361 break;
2362 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2363 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2364 break;
2365 }
2366
2367out:
2368 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2369 return ret;
2370}
2371
2372static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2373{
2374 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2375 int stream = substream->stream;
2376
2377 /* if FE's runtime_update is already set, we're in race;
2378 * process this trigger later at exit
2379 */
2380 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2381 fe->dpcm[stream].trigger_pending = cmd + 1;
2382 return 0; /* delayed, assuming it's successful */
2383 }
2384
2385 /* we're alone, let's trigger */
2386 return dpcm_fe_dai_do_trigger(substream, cmd);
2387}
2388
2389int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2390{
2391 struct snd_soc_dpcm *dpcm;
2392 int ret = 0;
2393
2394 for_each_dpcm_be(fe, stream, dpcm) {
2395
2396 struct snd_soc_pcm_runtime *be = dpcm->be;
2397 struct snd_pcm_substream *be_substream =
2398 snd_soc_dpcm_get_substream(be, stream);
2399
2400 /* is this op for this BE ? */
2401 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2402 continue;
2403
2404 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2405 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2406 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2407 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2408 continue;
2409
2410 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2411 be->dai_link->name);
2412
2413 ret = __soc_pcm_prepare(be, be_substream);
2414 if (ret < 0)
2415 break;
2416
2417 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2418 }
2419
2420 return soc_pcm_ret(fe, ret);
2421}
2422
2423static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2424{
2425 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2426 int stream = substream->stream, ret = 0;
2427
2428 snd_soc_dpcm_mutex_lock(fe);
2429
2430 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2431
2432 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2433
2434 /* there is no point preparing this FE if there are no BEs */
2435 if (list_empty(&fe->dpcm[stream].be_clients)) {
2436 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2437 fe->dai_link->name);
2438 ret = -EINVAL;
2439 goto out;
2440 }
2441
2442 ret = dpcm_be_dai_prepare(fe, stream);
2443 if (ret < 0)
2444 goto out;
2445
2446 /* call prepare on the frontend */
2447 ret = __soc_pcm_prepare(fe, substream);
2448 if (ret < 0)
2449 goto out;
2450
2451 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2452
2453out:
2454 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2455 snd_soc_dpcm_mutex_unlock(fe);
2456
2457 return soc_pcm_ret(fe, ret);
2458}
2459
2460static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2461{
2462 struct snd_pcm_substream *substream =
2463 snd_soc_dpcm_get_substream(fe, stream);
2464 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2465 int err;
2466
2467 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2468 stream ? "capture" : "playback", fe->dai_link->name);
2469
2470 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2471 /* call bespoke trigger - FE takes care of all BE triggers */
2472 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2473 fe->dai_link->name);
2474
2475 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2476 } else {
2477 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2478 fe->dai_link->name);
2479
2480 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2481 }
2482
2483 dpcm_be_dai_hw_free(fe, stream);
2484
2485 dpcm_be_dai_shutdown(fe, stream);
2486
2487 /* run the stream event for each BE */
2488 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2489
2490 return soc_pcm_ret(fe, err);
2491}
2492
2493static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2494{
2495 struct snd_pcm_substream *substream =
2496 snd_soc_dpcm_get_substream(fe, stream);
2497 struct snd_soc_dpcm *dpcm;
2498 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2499 int ret = 0;
2500
2501 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2502 stream ? "capture" : "playback", fe->dai_link->name);
2503
2504 /* Only start the BE if the FE is ready */
2505 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2506 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2507 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2508 fe->dai_link->name, fe->dpcm[stream].state);
2509 ret = -EINVAL;
2510 goto disconnect;
2511 }
2512
2513 /* startup must always be called for new BEs */
2514 ret = dpcm_be_dai_startup(fe, stream);
2515 if (ret < 0)
2516 goto disconnect;
2517
2518 /* keep going if FE state is > open */
2519 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2520 return 0;
2521
2522 ret = dpcm_be_dai_hw_params(fe, stream);
2523 if (ret < 0)
2524 goto close;
2525
2526 /* keep going if FE state is > hw_params */
2527 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2528 return 0;
2529
2530 ret = dpcm_be_dai_prepare(fe, stream);
2531 if (ret < 0)
2532 goto hw_free;
2533
2534 /* run the stream event for each BE */
2535 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2536
2537 /* keep going if FE state is > prepare */
2538 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2539 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2540 return 0;
2541
2542 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2543 /* call trigger on the frontend - FE takes care of all BE triggers */
2544 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2545 fe->dai_link->name);
2546
2547 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2548 if (ret < 0)
2549 goto hw_free;
2550 } else {
2551 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2552 fe->dai_link->name);
2553
2554 ret = dpcm_be_dai_trigger(fe, stream,
2555 SNDRV_PCM_TRIGGER_START);
2556 if (ret < 0)
2557 goto hw_free;
2558 }
2559
2560 return 0;
2561
2562hw_free:
2563 dpcm_be_dai_hw_free(fe, stream);
2564close:
2565 dpcm_be_dai_shutdown(fe, stream);
2566disconnect:
2567 /* disconnect any pending BEs */
2568 for_each_dpcm_be(fe, stream, dpcm) {
2569 struct snd_soc_pcm_runtime *be = dpcm->be;
2570
2571 /* is this op for this BE ? */
2572 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2573 continue;
2574
2575 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2576 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2577 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2578 }
2579
2580 return soc_pcm_ret(fe, ret);
2581}
2582
2583static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2584{
2585 struct snd_soc_dapm_widget_list *list;
2586 int stream;
2587 int count, paths;
2588
2589 if (!fe->dai_link->dynamic)
2590 return 0;
2591
2592 if (fe->dai_link->num_cpus > 1) {
2593 dev_err(fe->dev,
2594 "%s doesn't support Multi CPU yet\n", __func__);
2595 return -EINVAL;
2596 }
2597
2598 /* only check active links */
2599 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2600 return 0;
2601
2602 /* DAPM sync will call this to update DSP paths */
2603 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2604 new ? "new" : "old", fe->dai_link->name);
2605
2606 for_each_pcm_streams(stream) {
2607
2608 /* skip if FE doesn't have playback/capture capability */
2609 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2610 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2611 continue;
2612
2613 /* skip if FE isn't currently playing/capturing */
2614 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2615 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2616 continue;
2617
2618 paths = dpcm_path_get(fe, stream, &list);
2619 if (paths < 0)
2620 return paths;
2621
2622 /* update any playback/capture paths */
2623 count = dpcm_process_paths(fe, stream, &list, new);
2624 if (count) {
2625 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2626 if (new)
2627 dpcm_run_update_startup(fe, stream);
2628 else
2629 dpcm_run_update_shutdown(fe, stream);
2630 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2631
2632 dpcm_clear_pending_state(fe, stream);
2633 dpcm_be_disconnect(fe, stream);
2634 }
2635
2636 dpcm_path_put(&list);
2637 }
2638
2639 return 0;
2640}
2641
2642/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2643 * any DAI links.
2644 */
2645int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2646{
2647 struct snd_soc_pcm_runtime *fe;
2648 int ret = 0;
2649
2650 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
2651 /* shutdown all old paths first */
2652 for_each_card_rtds(card, fe) {
2653 ret = soc_dpcm_fe_runtime_update(fe, 0);
2654 if (ret)
2655 goto out;
2656 }
2657
2658 /* bring new paths up */
2659 for_each_card_rtds(card, fe) {
2660 ret = soc_dpcm_fe_runtime_update(fe, 1);
2661 if (ret)
2662 goto out;
2663 }
2664
2665out:
2666 mutex_unlock(&card->pcm_mutex);
2667 return ret;
2668}
2669EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2670
2671static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2672{
2673 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2674 struct snd_soc_dpcm *dpcm;
2675 int stream = fe_substream->stream;
2676
2677 snd_soc_dpcm_mutex_assert_held(fe);
2678
2679 /* mark FE's links ready to prune */
2680 for_each_dpcm_be(fe, stream, dpcm)
2681 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2682
2683 dpcm_be_disconnect(fe, stream);
2684
2685 fe->dpcm[stream].runtime = NULL;
2686}
2687
2688static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2689{
2690 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2691 int ret;
2692
2693 snd_soc_dpcm_mutex_lock(fe);
2694 ret = dpcm_fe_dai_shutdown(fe_substream);
2695
2696 dpcm_fe_dai_cleanup(fe_substream);
2697
2698 snd_soc_dpcm_mutex_unlock(fe);
2699 return ret;
2700}
2701
2702static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2703{
2704 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2705 struct snd_soc_dapm_widget_list *list;
2706 int ret;
2707 int stream = fe_substream->stream;
2708
2709 snd_soc_dpcm_mutex_lock(fe);
2710 fe->dpcm[stream].runtime = fe_substream->runtime;
2711
2712 ret = dpcm_path_get(fe, stream, &list);
2713 if (ret < 0)
2714 goto open_end;
2715
2716 /* calculate valid and active FE <-> BE dpcms */
2717 dpcm_process_paths(fe, stream, &list, 1);
2718
2719 ret = dpcm_fe_dai_startup(fe_substream);
2720 if (ret < 0)
2721 dpcm_fe_dai_cleanup(fe_substream);
2722
2723 dpcm_clear_pending_state(fe, stream);
2724 dpcm_path_put(&list);
2725open_end:
2726 snd_soc_dpcm_mutex_unlock(fe);
2727 return ret;
2728}
2729
2730static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2731 int *playback, int *capture)
2732{
2733 struct snd_soc_dai *cpu_dai;
2734 int i;
2735
2736 if (rtd->dai_link->dynamic && rtd->dai_link->num_cpus > 1) {
2737 dev_err(rtd->dev,
2738 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2739 return -EINVAL;
2740 }
2741
2742 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2743 int stream;
2744
2745 if (rtd->dai_link->dpcm_playback) {
2746 stream = SNDRV_PCM_STREAM_PLAYBACK;
2747
2748 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2749 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2750 *playback = 1;
2751 break;
2752 }
2753 }
2754 if (!*playback) {
2755 dev_err(rtd->card->dev,
2756 "No CPU DAIs support playback for stream %s\n",
2757 rtd->dai_link->stream_name);
2758 return -EINVAL;
2759 }
2760 }
2761 if (rtd->dai_link->dpcm_capture) {
2762 stream = SNDRV_PCM_STREAM_CAPTURE;
2763
2764 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2765 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2766 *capture = 1;
2767 break;
2768 }
2769 }
2770
2771 if (!*capture) {
2772 dev_err(rtd->card->dev,
2773 "No CPU DAIs support capture for stream %s\n",
2774 rtd->dai_link->stream_name);
2775 return -EINVAL;
2776 }
2777 }
2778 } else {
2779 struct snd_soc_dai *codec_dai;
2780
2781 /* Adapt stream for codec2codec links */
2782 int cpu_capture = rtd->dai_link->params ?
2783 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2784 int cpu_playback = rtd->dai_link->params ?
2785 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2786
2787 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2788 if (rtd->dai_link->num_cpus == 1) {
2789 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2790 } else if (rtd->dai_link->num_cpus == rtd->dai_link->num_codecs) {
2791 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2792 } else {
2793 dev_err(rtd->card->dev,
2794 "N cpus to M codecs link is not supported yet\n");
2795 return -EINVAL;
2796 }
2797
2798 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2799 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2800 *playback = 1;
2801 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2802 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2803 *capture = 1;
2804 }
2805 }
2806
2807 if (rtd->dai_link->playback_only) {
2808 *playback = 1;
2809 *capture = 0;
2810 }
2811
2812 if (rtd->dai_link->capture_only) {
2813 *playback = 0;
2814 *capture = 1;
2815 }
2816
2817 return 0;
2818}
2819
2820static int soc_create_pcm(struct snd_pcm **pcm,
2821 struct snd_soc_pcm_runtime *rtd,
2822 int playback, int capture, int num)
2823{
2824 char new_name[64];
2825 int ret;
2826
2827 /* create the PCM */
2828 if (rtd->dai_link->params) {
2829 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2830 rtd->dai_link->stream_name);
2831
2832 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2833 playback, capture, pcm);
2834 } else if (rtd->dai_link->no_pcm) {
2835 snprintf(new_name, sizeof(new_name), "(%s)",
2836 rtd->dai_link->stream_name);
2837
2838 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2839 playback, capture, pcm);
2840 } else {
2841 if (rtd->dai_link->dynamic)
2842 snprintf(new_name, sizeof(new_name), "%s (*)",
2843 rtd->dai_link->stream_name);
2844 else
2845 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2846 rtd->dai_link->stream_name,
2847 soc_codec_dai_name(rtd), num);
2848
2849 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2850 capture, pcm);
2851 }
2852 if (ret < 0) {
2853 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2854 new_name, rtd->dai_link->name, ret);
2855 return ret;
2856 }
2857 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2858
2859 return 0;
2860}
2861
2862/* create a new pcm */
2863int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2864{
2865 struct snd_soc_component *component;
2866 struct snd_pcm *pcm;
2867 int ret = 0, playback = 0, capture = 0;
2868 int i;
2869
2870 ret = soc_get_playback_capture(rtd, &playback, &capture);
2871 if (ret < 0)
2872 return ret;
2873
2874 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2875 if (ret < 0)
2876 return ret;
2877
2878 /* DAPM dai link stream work */
2879 /*
2880 * Currently nothing to do for c2c links
2881 * Since c2c links are internal nodes in the DAPM graph and
2882 * don't interface with the outside world or application layer
2883 * we don't have to do any special handling on close.
2884 */
2885 if (!rtd->dai_link->params)
2886 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2887
2888 rtd->pcm = pcm;
2889 pcm->nonatomic = rtd->dai_link->nonatomic;
2890 pcm->private_data = rtd;
2891 pcm->no_device_suspend = true;
2892
2893 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2894 if (playback)
2895 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2896 if (capture)
2897 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2898 goto out;
2899 }
2900
2901 /* ASoC PCM operations */
2902 if (rtd->dai_link->dynamic) {
2903 rtd->ops.open = dpcm_fe_dai_open;
2904 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2905 rtd->ops.prepare = dpcm_fe_dai_prepare;
2906 rtd->ops.trigger = dpcm_fe_dai_trigger;
2907 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2908 rtd->ops.close = dpcm_fe_dai_close;
2909 rtd->ops.pointer = soc_pcm_pointer;
2910 } else {
2911 rtd->ops.open = soc_pcm_open;
2912 rtd->ops.hw_params = soc_pcm_hw_params;
2913 rtd->ops.prepare = soc_pcm_prepare;
2914 rtd->ops.trigger = soc_pcm_trigger;
2915 rtd->ops.hw_free = soc_pcm_hw_free;
2916 rtd->ops.close = soc_pcm_close;
2917 rtd->ops.pointer = soc_pcm_pointer;
2918 }
2919
2920 for_each_rtd_components(rtd, i, component) {
2921 const struct snd_soc_component_driver *drv = component->driver;
2922
2923 if (drv->ioctl)
2924 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2925 if (drv->sync_stop)
2926 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2927 if (drv->copy_user)
2928 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2929 if (drv->page)
2930 rtd->ops.page = snd_soc_pcm_component_page;
2931 if (drv->mmap)
2932 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2933 if (drv->ack)
2934 rtd->ops.ack = snd_soc_pcm_component_ack;
2935 }
2936
2937 if (playback)
2938 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2939
2940 if (capture)
2941 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2942
2943 ret = snd_soc_pcm_component_new(rtd);
2944 if (ret < 0)
2945 return ret;
2946out:
2947 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2948 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2949 return ret;
2950}
2951
2952/* is the current PCM operation for this FE ? */
2953int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2954{
2955 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2956 return 1;
2957 return 0;
2958}
2959EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2960
2961/* is the current PCM operation for this BE ? */
2962int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2963 struct snd_soc_pcm_runtime *be, int stream)
2964{
2965 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2966 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2967 be->dpcm[stream].runtime_update))
2968 return 1;
2969 return 0;
2970}
2971EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2972
2973/* get the substream for this BE */
2974struct snd_pcm_substream *
2975 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2976{
2977 return be->pcm->streams[stream].substream;
2978}
2979EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2980
2981static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2982 struct snd_soc_pcm_runtime *be,
2983 int stream,
2984 const enum snd_soc_dpcm_state *states,
2985 int num_states)
2986{
2987 struct snd_soc_dpcm *dpcm;
2988 int state;
2989 int ret = 1;
2990 int i;
2991
2992 for_each_dpcm_fe(be, stream, dpcm) {
2993
2994 if (dpcm->fe == fe)
2995 continue;
2996
2997 state = dpcm->fe->dpcm[stream].state;
2998 for (i = 0; i < num_states; i++) {
2999 if (state == states[i]) {
3000 ret = 0;
3001 break;
3002 }
3003 }
3004 }
3005
3006 /* it's safe to do this BE DAI */
3007 return ret;
3008}
3009
3010/*
3011 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3012 * are not running, paused or suspended for the specified stream direction.
3013 */
3014int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3015 struct snd_soc_pcm_runtime *be, int stream)
3016{
3017 const enum snd_soc_dpcm_state state[] = {
3018 SND_SOC_DPCM_STATE_START,
3019 SND_SOC_DPCM_STATE_PAUSED,
3020 SND_SOC_DPCM_STATE_SUSPEND,
3021 };
3022
3023 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3024}
3025EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3026
3027/*
3028 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3029 * running, paused or suspended for the specified stream direction.
3030 */
3031int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3032 struct snd_soc_pcm_runtime *be, int stream)
3033{
3034 const enum snd_soc_dpcm_state state[] = {
3035 SND_SOC_DPCM_STATE_START,
3036 SND_SOC_DPCM_STATE_PAUSED,
3037 SND_SOC_DPCM_STATE_SUSPEND,
3038 SND_SOC_DPCM_STATE_PREPARE,
3039 };
3040
3041 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3042}
3043EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-pcm.c -- ALSA SoC PCM
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Copyright 2005 Openedhand Ltd.
7// Copyright (C) 2010 Slimlogic Ltd.
8// Copyright (C) 2010 Texas Instruments Inc.
9//
10// Authors: Liam Girdwood <lrg@ti.com>
11// Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/delay.h>
16#include <linux/pinctrl/consumer.h>
17#include <linux/slab.h>
18#include <linux/workqueue.h>
19#include <linux/export.h>
20#include <linux/debugfs.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/soc-dpcm.h>
26#include <sound/soc-link.h>
27#include <sound/initval.h>
28
29#define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
30static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
31 const char *func, int ret)
32{
33 /* Positive, Zero values are not errors */
34 if (ret >= 0)
35 return ret;
36
37 /* Negative values might be errors */
38 switch (ret) {
39 case -EPROBE_DEFER:
40 case -ENOTSUPP:
41 case -EINVAL:
42 break;
43 default:
44 dev_err(rtd->dev,
45 "ASoC: error at %s on %s: %d\n",
46 func, rtd->dai_link->name, ret);
47 }
48
49 return ret;
50}
51
52static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
53 int stream)
54{
55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
56}
57
58#define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
60
61static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
62 int stream)
63{
64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
65}
66
67#define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
69
70#define DPCM_MAX_BE_USERS 8
71
72static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
73{
74 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu";
75}
76static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
77{
78 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec";
79}
80
81#ifdef CONFIG_DEBUG_FS
82static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
83{
84 switch (state) {
85 case SND_SOC_DPCM_STATE_NEW:
86 return "new";
87 case SND_SOC_DPCM_STATE_OPEN:
88 return "open";
89 case SND_SOC_DPCM_STATE_HW_PARAMS:
90 return "hw_params";
91 case SND_SOC_DPCM_STATE_PREPARE:
92 return "prepare";
93 case SND_SOC_DPCM_STATE_START:
94 return "start";
95 case SND_SOC_DPCM_STATE_STOP:
96 return "stop";
97 case SND_SOC_DPCM_STATE_SUSPEND:
98 return "suspend";
99 case SND_SOC_DPCM_STATE_PAUSED:
100 return "paused";
101 case SND_SOC_DPCM_STATE_HW_FREE:
102 return "hw_free";
103 case SND_SOC_DPCM_STATE_CLOSE:
104 return "close";
105 }
106
107 return "unknown";
108}
109
110static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
111 int stream, char *buf, size_t size)
112{
113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
114 struct snd_soc_dpcm *dpcm;
115 ssize_t offset = 0;
116
117 /* FE state */
118 offset += scnprintf(buf + offset, size - offset,
119 "[%s - %s]\n", fe->dai_link->name,
120 stream ? "Capture" : "Playback");
121
122 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
123 dpcm_state_string(fe->dpcm[stream].state));
124
125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
127 offset += scnprintf(buf + offset, size - offset,
128 "Hardware Params: "
129 "Format = %s, Channels = %d, Rate = %d\n",
130 snd_pcm_format_name(params_format(params)),
131 params_channels(params),
132 params_rate(params));
133
134 /* BEs state */
135 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
136
137 if (list_empty(&fe->dpcm[stream].be_clients)) {
138 offset += scnprintf(buf + offset, size - offset,
139 " No active DSP links\n");
140 goto out;
141 }
142
143 for_each_dpcm_be(fe, stream, dpcm) {
144 struct snd_soc_pcm_runtime *be = dpcm->be;
145 params = &be->dpcm[stream].hw_params;
146
147 offset += scnprintf(buf + offset, size - offset,
148 "- %s\n", be->dai_link->name);
149
150 offset += scnprintf(buf + offset, size - offset,
151 " State: %s\n",
152 dpcm_state_string(be->dpcm[stream].state));
153
154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
156 offset += scnprintf(buf + offset, size - offset,
157 " Hardware Params: "
158 "Format = %s, Channels = %d, Rate = %d\n",
159 snd_pcm_format_name(params_format(params)),
160 params_channels(params),
161 params_rate(params));
162 }
163out:
164 return offset;
165}
166
167static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
168 size_t count, loff_t *ppos)
169{
170 struct snd_soc_pcm_runtime *fe = file->private_data;
171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
172 int stream;
173 char *buf;
174
175 if (fe->dai_link->num_cpus > 1) {
176 dev_err(fe->dev,
177 "%s doesn't support Multi CPU yet\n", __func__);
178 return -EINVAL;
179 }
180
181 buf = kmalloc(out_count, GFP_KERNEL);
182 if (!buf)
183 return -ENOMEM;
184
185 snd_soc_dpcm_mutex_lock(fe);
186 for_each_pcm_streams(stream)
187 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream))
188 offset += dpcm_show_state(fe, stream,
189 buf + offset,
190 out_count - offset);
191 snd_soc_dpcm_mutex_unlock(fe);
192
193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
194
195 kfree(buf);
196 return ret;
197}
198
199static const struct file_operations dpcm_state_fops = {
200 .open = simple_open,
201 .read = dpcm_state_read_file,
202 .llseek = default_llseek,
203};
204
205void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
206{
207 if (!rtd->dai_link->dynamic)
208 return;
209
210 if (!rtd->card->debugfs_card_root)
211 return;
212
213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
214 rtd->card->debugfs_card_root);
215
216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
217 rtd, &dpcm_state_fops);
218}
219
220static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
221{
222 char *name;
223
224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
225 stream ? "capture" : "playback");
226 if (name) {
227 dpcm->debugfs_state = debugfs_create_dir(
228 name, dpcm->fe->debugfs_dpcm_root);
229 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
230 &dpcm->state);
231 kfree(name);
232 }
233}
234
235static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
236{
237 debugfs_remove_recursive(dpcm->debugfs_state);
238}
239
240#else
241static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
242 int stream)
243{
244}
245
246static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
247{
248}
249#endif
250
251/* Set FE's runtime_update state; the state is protected via PCM stream lock
252 * for avoiding the race with trigger callback.
253 * If the state is unset and a trigger is pending while the previous operation,
254 * process the pending trigger action here.
255 */
256static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
257static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
258 int stream, enum snd_soc_dpcm_update state)
259{
260 struct snd_pcm_substream *substream =
261 snd_soc_dpcm_get_substream(fe, stream);
262
263 snd_soc_dpcm_stream_lock_irq(fe, stream);
264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
265 dpcm_fe_dai_do_trigger(substream,
266 fe->dpcm[stream].trigger_pending - 1);
267 fe->dpcm[stream].trigger_pending = 0;
268 }
269 fe->dpcm[stream].runtime_update = state;
270 snd_soc_dpcm_stream_unlock_irq(fe, stream);
271}
272
273static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
274 int stream, enum snd_soc_dpcm_update state)
275{
276 be->dpcm[stream].runtime_update = state;
277}
278
279/**
280 * snd_soc_runtime_action() - Increment/Decrement active count for
281 * PCM runtime components
282 * @rtd: ASoC PCM runtime that is activated
283 * @stream: Direction of the PCM stream
284 * @action: Activate stream if 1. Deactivate if -1.
285 *
286 * Increments/Decrements the active count for all the DAIs and components
287 * attached to a PCM runtime.
288 * Should typically be called when a stream is opened.
289 *
290 * Must be called with the rtd->card->pcm_mutex being held
291 */
292void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
293 int stream, int action)
294{
295 struct snd_soc_component *component;
296 struct snd_soc_dai *dai;
297 int i;
298
299 snd_soc_dpcm_mutex_assert_held(rtd);
300
301 for_each_rtd_dais(rtd, i, dai)
302 snd_soc_dai_action(dai, stream, action);
303
304 /* Increments/Decrements the active count for components without DAIs */
305 for_each_rtd_components(rtd, i, component) {
306 if (component->num_dai)
307 continue;
308 component->active += action;
309 }
310}
311EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
312
313/**
314 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
315 * @rtd: The ASoC PCM runtime that should be checked.
316 *
317 * This function checks whether the power down delay should be ignored for a
318 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
319 * been configured to ignore the delay, or if none of the components benefits
320 * from having the delay.
321 */
322bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
323{
324 struct snd_soc_component *component;
325 bool ignore = true;
326 int i;
327
328 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
329 return true;
330
331 for_each_rtd_components(rtd, i, component)
332 ignore &= !component->driver->use_pmdown_time;
333
334 return ignore;
335}
336
337/**
338 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
339 * @substream: the pcm substream
340 * @hw: the hardware parameters
341 *
342 * Sets the substream runtime hardware parameters.
343 */
344int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
345 const struct snd_pcm_hardware *hw)
346{
347 substream->runtime->hw = *hw;
348
349 return 0;
350}
351EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
352
353/* DPCM stream event, send event to FE and all active BEs. */
354int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
355 int event)
356{
357 struct snd_soc_dpcm *dpcm;
358
359 snd_soc_dpcm_mutex_assert_held(fe);
360
361 for_each_dpcm_be(fe, dir, dpcm) {
362
363 struct snd_soc_pcm_runtime *be = dpcm->be;
364
365 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
366 be->dai_link->name, event, dir);
367
368 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
369 (be->dpcm[dir].users >= 1))
370 continue;
371
372 snd_soc_dapm_stream_event(be, dir, event);
373 }
374
375 snd_soc_dapm_stream_event(fe, dir, event);
376
377 return 0;
378}
379
380static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
381 struct snd_pcm_hw_params *params)
382{
383 if (params) {
384 dai->rate = params_rate(params);
385 dai->channels = params_channels(params);
386 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
387 } else {
388 dai->rate = 0;
389 dai->channels = 0;
390 dai->sample_bits = 0;
391 }
392}
393
394static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
395 struct snd_soc_dai *soc_dai)
396{
397 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
398 int ret;
399
400 if (!snd_soc_dai_active(soc_dai))
401 return 0;
402
403#define __soc_pcm_apply_symmetry(name, NAME) \
404 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
405 rtd->dai_link->symmetric_##name)) { \
406 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
407 #name, soc_dai->name); \
408 \
409 ret = snd_pcm_hw_constraint_single(substream->runtime, \
410 SNDRV_PCM_HW_PARAM_##NAME,\
411 soc_dai->name); \
412 if (ret < 0) { \
413 dev_err(soc_dai->dev, \
414 "ASoC: Unable to apply %s constraint: %d\n",\
415 #name, ret); \
416 return ret; \
417 } \
418 }
419
420 __soc_pcm_apply_symmetry(rate, RATE);
421 __soc_pcm_apply_symmetry(channels, CHANNELS);
422 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
423
424 return 0;
425}
426
427static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
428 struct snd_pcm_hw_params *params)
429{
430 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
431 struct snd_soc_dai d;
432 struct snd_soc_dai *dai;
433 struct snd_soc_dai *cpu_dai;
434 unsigned int symmetry, i;
435
436 d.name = __func__;
437 soc_pcm_set_dai_params(&d, params);
438
439#define __soc_pcm_params_symmetry(xxx) \
440 symmetry = rtd->dai_link->symmetric_##xxx; \
441 for_each_rtd_dais(rtd, i, dai) \
442 symmetry |= dai->driver->symmetric_##xxx; \
443 \
444 if (symmetry) \
445 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
446 if (!snd_soc_dai_is_dummy(cpu_dai) && \
447 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
448 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
449 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
450 return -EINVAL; \
451 }
452
453 /* reject unmatched parameters when applying symmetry */
454 __soc_pcm_params_symmetry(rate);
455 __soc_pcm_params_symmetry(channels);
456 __soc_pcm_params_symmetry(sample_bits);
457
458 return 0;
459}
460
461static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
462{
463 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
464 struct snd_soc_dai_link *link = rtd->dai_link;
465 struct snd_soc_dai *dai;
466 unsigned int symmetry, i;
467
468 symmetry = link->symmetric_rate ||
469 link->symmetric_channels ||
470 link->symmetric_sample_bits;
471
472 for_each_rtd_dais(rtd, i, dai)
473 symmetry = symmetry ||
474 dai->driver->symmetric_rate ||
475 dai->driver->symmetric_channels ||
476 dai->driver->symmetric_sample_bits;
477
478 if (symmetry)
479 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
480}
481
482static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
483{
484 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
485 int ret;
486
487 if (!bits)
488 return;
489
490 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
491 if (ret != 0)
492 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
493 bits, ret);
494}
495
496static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
497{
498 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
499 struct snd_soc_dai *cpu_dai;
500 struct snd_soc_dai *codec_dai;
501 int stream = substream->stream;
502 int i;
503 unsigned int bits = 0, cpu_bits = 0;
504
505 for_each_rtd_codec_dais(rtd, i, codec_dai) {
506 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
507
508 if (pcm_codec->sig_bits == 0) {
509 bits = 0;
510 break;
511 }
512 bits = max(pcm_codec->sig_bits, bits);
513 }
514
515 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
516 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
517
518 if (pcm_cpu->sig_bits == 0) {
519 cpu_bits = 0;
520 break;
521 }
522 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
523 }
524
525 soc_pcm_set_msb(substream, bits);
526 soc_pcm_set_msb(substream, cpu_bits);
527}
528
529static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
530{
531 hw->rates = UINT_MAX;
532 hw->rate_min = 0;
533 hw->rate_max = UINT_MAX;
534 hw->channels_min = 0;
535 hw->channels_max = UINT_MAX;
536 hw->formats = ULLONG_MAX;
537}
538
539static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
540 struct snd_soc_pcm_stream *p)
541{
542 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
543
544 /* setup hw->rate_min/max via hw->rates first */
545 snd_pcm_hw_limit_rates(hw);
546
547 /* update hw->rate_min/max by snd_soc_pcm_stream */
548 hw->rate_min = max(hw->rate_min, p->rate_min);
549 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
550}
551
552static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
553 struct snd_soc_pcm_stream *p)
554{
555 hw->channels_min = max(hw->channels_min, p->channels_min);
556 hw->channels_max = min(hw->channels_max, p->channels_max);
557}
558
559static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
560 struct snd_soc_pcm_stream *p)
561{
562 hw->formats &= p->formats;
563}
564
565static void soc_pcm_hw_update_subformat(struct snd_pcm_hardware *hw,
566 struct snd_soc_pcm_stream *p)
567{
568 hw->subformats &= p->subformats;
569}
570
571/**
572 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
573 * @rtd: ASoC PCM runtime
574 * @hw: PCM hardware parameters (output)
575 * @stream: Direction of the PCM stream
576 *
577 * Calculates the subset of stream parameters supported by all DAIs
578 * associated with the PCM stream.
579 */
580int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
581 struct snd_pcm_hardware *hw, int stream)
582{
583 struct snd_soc_dai *codec_dai;
584 struct snd_soc_dai *cpu_dai;
585 struct snd_soc_pcm_stream *codec_stream;
586 struct snd_soc_pcm_stream *cpu_stream;
587 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
588 int i;
589
590 soc_pcm_hw_init(hw);
591
592 /* first calculate min/max only for CPUs in the DAI link */
593 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
594
595 /*
596 * Skip CPUs which don't support the current stream type.
597 * Otherwise, since the rate, channel, and format values will
598 * zero in that case, we would have no usable settings left,
599 * causing the resulting setup to fail.
600 */
601 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
602 continue;
603
604 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
605
606 soc_pcm_hw_update_chan(hw, cpu_stream);
607 soc_pcm_hw_update_rate(hw, cpu_stream);
608 soc_pcm_hw_update_format(hw, cpu_stream);
609 soc_pcm_hw_update_subformat(hw, cpu_stream);
610 }
611 cpu_chan_min = hw->channels_min;
612 cpu_chan_max = hw->channels_max;
613
614 /* second calculate min/max only for CODECs in the DAI link */
615 for_each_rtd_codec_dais(rtd, i, codec_dai) {
616
617 /*
618 * Skip CODECs which don't support the current stream type.
619 * Otherwise, since the rate, channel, and format values will
620 * zero in that case, we would have no usable settings left,
621 * causing the resulting setup to fail.
622 */
623 if (!snd_soc_dai_stream_valid(codec_dai, stream))
624 continue;
625
626 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
627
628 soc_pcm_hw_update_chan(hw, codec_stream);
629 soc_pcm_hw_update_rate(hw, codec_stream);
630 soc_pcm_hw_update_format(hw, codec_stream);
631 soc_pcm_hw_update_subformat(hw, codec_stream);
632 }
633
634 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
635 if (!hw->channels_min)
636 return -EINVAL;
637
638 /*
639 * chan min/max cannot be enforced if there are multiple CODEC DAIs
640 * connected to CPU DAI(s), use CPU DAI's directly and let
641 * channel allocation be fixed up later
642 */
643 if (rtd->dai_link->num_codecs > 1) {
644 hw->channels_min = cpu_chan_min;
645 hw->channels_max = cpu_chan_max;
646 }
647
648 return 0;
649}
650EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
651
652static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
653{
654 struct snd_pcm_hardware *hw = &substream->runtime->hw;
655 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
656 u64 formats = hw->formats;
657
658 /*
659 * At least one CPU and one CODEC should match. Otherwise, we should
660 * have bailed out on a higher level, since there would be no CPU or
661 * CODEC to support the transfer direction in that case.
662 */
663 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
664
665 if (formats)
666 hw->formats &= formats;
667}
668
669static int soc_pcm_components_open(struct snd_pcm_substream *substream)
670{
671 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
672 struct snd_soc_component *component;
673 int i, ret = 0;
674
675 for_each_rtd_components(rtd, i, component) {
676 ret = snd_soc_component_module_get_when_open(component, substream);
677 if (ret < 0)
678 break;
679
680 ret = snd_soc_component_open(component, substream);
681 if (ret < 0)
682 break;
683 }
684
685 return ret;
686}
687
688static int soc_pcm_components_close(struct snd_pcm_substream *substream,
689 int rollback)
690{
691 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
692 struct snd_soc_component *component;
693 int i, ret = 0;
694
695 for_each_rtd_components(rtd, i, component) {
696 int r = snd_soc_component_close(component, substream, rollback);
697 if (r < 0)
698 ret = r; /* use last ret */
699
700 snd_soc_component_module_put_when_close(component, substream, rollback);
701 }
702
703 return ret;
704}
705
706static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
707 struct snd_pcm_substream *substream, int rollback)
708{
709 struct snd_soc_component *component;
710 struct snd_soc_dai *dai;
711 int i;
712
713 snd_soc_dpcm_mutex_assert_held(rtd);
714
715 if (!rollback) {
716 snd_soc_runtime_deactivate(rtd, substream->stream);
717
718 /* Make sure DAI parameters cleared if the DAI becomes inactive */
719 for_each_rtd_dais(rtd, i, dai) {
720 if (snd_soc_dai_active(dai) == 0 &&
721 (dai->rate || dai->channels || dai->sample_bits))
722 soc_pcm_set_dai_params(dai, NULL);
723 }
724 }
725
726 for_each_rtd_dais(rtd, i, dai)
727 snd_soc_dai_shutdown(dai, substream, rollback);
728
729 snd_soc_link_shutdown(substream, rollback);
730
731 soc_pcm_components_close(substream, rollback);
732
733 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
734
735 for_each_rtd_components(rtd, i, component)
736 if (!snd_soc_component_active(component))
737 pinctrl_pm_select_sleep_state(component->dev);
738
739 return 0;
740}
741
742/*
743 * Called by ALSA when a PCM substream is closed. Private data can be
744 * freed here. The cpu DAI, codec DAI, machine and components are also
745 * shutdown.
746 */
747static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
748 struct snd_pcm_substream *substream)
749{
750 return soc_pcm_clean(rtd, substream, 0);
751}
752
753/* PCM close ops for non-DPCM streams */
754static int soc_pcm_close(struct snd_pcm_substream *substream)
755{
756 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
757
758 snd_soc_dpcm_mutex_lock(rtd);
759 __soc_pcm_close(rtd, substream);
760 snd_soc_dpcm_mutex_unlock(rtd);
761 return 0;
762}
763
764static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
765{
766 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
767 struct snd_pcm_hardware *hw = &substream->runtime->hw;
768 const char *name_cpu = soc_cpu_dai_name(rtd);
769 const char *name_codec = soc_codec_dai_name(rtd);
770 const char *err_msg;
771 struct device *dev = rtd->dev;
772
773 err_msg = "rates";
774 if (!hw->rates)
775 goto config_err;
776
777 err_msg = "formats";
778 if (!hw->formats)
779 goto config_err;
780
781 err_msg = "channels";
782 if (!hw->channels_min || !hw->channels_max ||
783 hw->channels_min > hw->channels_max)
784 goto config_err;
785
786 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
787 name_cpu);
788 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
789 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
790 hw->channels_max);
791 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
792 hw->rate_max);
793
794 return 0;
795
796config_err:
797 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
798 name_codec, name_cpu, err_msg);
799 return -EINVAL;
800}
801
802/*
803 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
804 * then initialized and any private data can be allocated. This also calls
805 * startup for the cpu DAI, component, machine and codec DAI.
806 */
807static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
808 struct snd_pcm_substream *substream)
809{
810 struct snd_soc_component *component;
811 struct snd_soc_dai *dai;
812 int i, ret = 0;
813
814 snd_soc_dpcm_mutex_assert_held(rtd);
815
816 for_each_rtd_components(rtd, i, component)
817 pinctrl_pm_select_default_state(component->dev);
818
819 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
820 if (ret < 0)
821 goto err;
822
823 ret = soc_pcm_components_open(substream);
824 if (ret < 0)
825 goto err;
826
827 ret = snd_soc_link_startup(substream);
828 if (ret < 0)
829 goto err;
830
831 /* startup the audio subsystem */
832 for_each_rtd_dais(rtd, i, dai) {
833 ret = snd_soc_dai_startup(dai, substream);
834 if (ret < 0)
835 goto err;
836 }
837
838 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
839 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
840 goto dynamic;
841
842 /* Check that the codec and cpu DAIs are compatible */
843 soc_pcm_init_runtime_hw(substream);
844
845 soc_pcm_update_symmetry(substream);
846
847 ret = soc_hw_sanity_check(substream);
848 if (ret < 0)
849 goto err;
850
851 soc_pcm_apply_msb(substream);
852
853 /* Symmetry only applies if we've already got an active stream. */
854 for_each_rtd_dais(rtd, i, dai) {
855 ret = soc_pcm_apply_symmetry(substream, dai);
856 if (ret != 0)
857 goto err;
858 }
859dynamic:
860 snd_soc_runtime_activate(rtd, substream->stream);
861 ret = 0;
862err:
863 if (ret < 0)
864 soc_pcm_clean(rtd, substream, 1);
865
866 return soc_pcm_ret(rtd, ret);
867}
868
869/* PCM open ops for non-DPCM streams */
870static int soc_pcm_open(struct snd_pcm_substream *substream)
871{
872 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
873 int ret;
874
875 snd_soc_dpcm_mutex_lock(rtd);
876 ret = __soc_pcm_open(rtd, substream);
877 snd_soc_dpcm_mutex_unlock(rtd);
878 return ret;
879}
880
881/*
882 * Called by ALSA when the PCM substream is prepared, can set format, sample
883 * rate, etc. This function is non atomic and can be called multiple times,
884 * it can refer to the runtime info.
885 */
886static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
887 struct snd_pcm_substream *substream)
888{
889 struct snd_soc_dai *dai;
890 int i, ret = 0;
891
892 snd_soc_dpcm_mutex_assert_held(rtd);
893
894 ret = snd_soc_link_prepare(substream);
895 if (ret < 0)
896 goto out;
897
898 ret = snd_soc_pcm_component_prepare(substream);
899 if (ret < 0)
900 goto out;
901
902 ret = snd_soc_pcm_dai_prepare(substream);
903 if (ret < 0)
904 goto out;
905
906 /* cancel any delayed stream shutdown that is pending */
907 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
908 rtd->pop_wait) {
909 rtd->pop_wait = 0;
910 cancel_delayed_work(&rtd->delayed_work);
911 }
912
913 snd_soc_dapm_stream_event(rtd, substream->stream,
914 SND_SOC_DAPM_STREAM_START);
915
916 for_each_rtd_dais(rtd, i, dai) {
917 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
918 snd_soc_dai_digital_mute(dai, 0, substream->stream);
919 }
920
921out:
922 return soc_pcm_ret(rtd, ret);
923}
924
925/* PCM prepare ops for non-DPCM streams */
926static int soc_pcm_prepare(struct snd_pcm_substream *substream)
927{
928 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
929 int ret;
930
931 snd_soc_dpcm_mutex_lock(rtd);
932 ret = __soc_pcm_prepare(rtd, substream);
933 snd_soc_dpcm_mutex_unlock(rtd);
934 return ret;
935}
936
937static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
938 unsigned int mask)
939{
940 struct snd_interval *interval;
941 int channels = hweight_long(mask);
942
943 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
944 interval->min = channels;
945 interval->max = channels;
946}
947
948static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
949 struct snd_pcm_substream *substream, int rollback)
950{
951 struct snd_soc_dai *dai;
952 int i;
953
954 snd_soc_dpcm_mutex_assert_held(rtd);
955
956 /* clear the corresponding DAIs parameters when going to be inactive */
957 for_each_rtd_dais(rtd, i, dai) {
958 if (snd_soc_dai_active(dai) == 1)
959 soc_pcm_set_dai_params(dai, NULL);
960
961 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
962 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
963 snd_soc_dai_digital_mute(dai, 1, substream->stream);
964 }
965 }
966
967 /* run the stream event */
968 snd_soc_dapm_stream_stop(rtd, substream->stream);
969
970 /* free any machine hw params */
971 snd_soc_link_hw_free(substream, rollback);
972
973 /* free any component resources */
974 snd_soc_pcm_component_hw_free(substream, rollback);
975
976 /* now free hw params for the DAIs */
977 for_each_rtd_dais(rtd, i, dai)
978 if (snd_soc_dai_stream_valid(dai, substream->stream))
979 snd_soc_dai_hw_free(dai, substream, rollback);
980
981 return 0;
982}
983
984/*
985 * Frees resources allocated by hw_params, can be called multiple times
986 */
987static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
988 struct snd_pcm_substream *substream)
989{
990 return soc_pcm_hw_clean(rtd, substream, 0);
991}
992
993/* hw_free PCM ops for non-DPCM streams */
994static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
995{
996 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
997 int ret;
998
999 snd_soc_dpcm_mutex_lock(rtd);
1000 ret = __soc_pcm_hw_free(rtd, substream);
1001 snd_soc_dpcm_mutex_unlock(rtd);
1002 return ret;
1003}
1004
1005/*
1006 * Called by ALSA when the hardware params are set by application. This
1007 * function can also be called multiple times and can allocate buffers
1008 * (using snd_pcm_lib_* ). It's non-atomic.
1009 */
1010static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
1011 struct snd_pcm_substream *substream,
1012 struct snd_pcm_hw_params *params)
1013{
1014 struct snd_soc_dai *cpu_dai;
1015 struct snd_soc_dai *codec_dai;
1016 struct snd_pcm_hw_params tmp_params;
1017 int i, ret = 0;
1018
1019 snd_soc_dpcm_mutex_assert_held(rtd);
1020
1021 ret = soc_pcm_params_symmetry(substream, params);
1022 if (ret)
1023 goto out;
1024
1025 ret = snd_soc_link_hw_params(substream, params);
1026 if (ret < 0)
1027 goto out;
1028
1029 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1030 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
1031
1032 /*
1033 * Skip CODECs which don't support the current stream type,
1034 * the idea being that if a CODEC is not used for the currently
1035 * set up transfer direction, it should not need to be
1036 * configured, especially since the configuration used might
1037 * not even be supported by that CODEC. There may be cases
1038 * however where a CODEC needs to be set up although it is
1039 * actually not being used for the transfer, e.g. if a
1040 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1041 * for the DAI link including a playback-only CODEC.
1042 * If this becomes necessary, we will have to augment the
1043 * machine driver setup with information on how to act, so
1044 * we can do the right thing here.
1045 */
1046 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1047 continue;
1048
1049 /* copy params for each codec */
1050 tmp_params = *params;
1051
1052 /* fixup params based on TDM slot masks */
1053 if (tdm_mask)
1054 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
1055
1056 ret = snd_soc_dai_hw_params(codec_dai, substream,
1057 &tmp_params);
1058 if(ret < 0)
1059 goto out;
1060
1061 soc_pcm_set_dai_params(codec_dai, &tmp_params);
1062 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
1063 }
1064
1065 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1066 struct snd_soc_dai_link_ch_map *ch_maps;
1067 unsigned int ch_mask = 0;
1068 int j;
1069
1070 /*
1071 * Skip CPUs which don't support the current stream
1072 * type. See soc_pcm_init_runtime_hw() for more details
1073 */
1074 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1075 continue;
1076
1077 /* copy params for each cpu */
1078 tmp_params = *params;
1079
1080 /*
1081 * construct cpu channel mask by combining ch_mask of each
1082 * codec which maps to the cpu.
1083 * see
1084 * soc.h :: [dai_link->ch_maps Image sample]
1085 */
1086 for_each_rtd_ch_maps(rtd, j, ch_maps)
1087 if (ch_maps->cpu == i)
1088 ch_mask |= ch_maps->ch_mask;
1089
1090 /* fixup cpu channel number */
1091 if (ch_mask)
1092 soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
1093
1094 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
1095 if (ret < 0)
1096 goto out;
1097
1098 /* store the parameters for each DAI */
1099 soc_pcm_set_dai_params(cpu_dai, &tmp_params);
1100 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
1101 }
1102
1103 ret = snd_soc_pcm_component_hw_params(substream, params);
1104out:
1105 if (ret < 0)
1106 soc_pcm_hw_clean(rtd, substream, 1);
1107
1108 return soc_pcm_ret(rtd, ret);
1109}
1110
1111/* hw_params PCM ops for non-DPCM streams */
1112static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1113 struct snd_pcm_hw_params *params)
1114{
1115 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1116 int ret;
1117
1118 snd_soc_dpcm_mutex_lock(rtd);
1119 ret = __soc_pcm_hw_params(rtd, substream, params);
1120 snd_soc_dpcm_mutex_unlock(rtd);
1121 return ret;
1122}
1123
1124#define TRIGGER_MAX 3
1125static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1126 [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1127 snd_soc_link_trigger,
1128 snd_soc_pcm_component_trigger,
1129 snd_soc_pcm_dai_trigger,
1130 },
1131 [SND_SOC_TRIGGER_ORDER_LDC] = {
1132 snd_soc_link_trigger,
1133 snd_soc_pcm_dai_trigger,
1134 snd_soc_pcm_component_trigger,
1135 },
1136};
1137
1138static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1139{
1140 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1141 struct snd_soc_component *component;
1142 int ret = 0, r = 0, i;
1143 int rollback = 0;
1144 int start = 0, stop = 0;
1145
1146 /*
1147 * select START/STOP sequence
1148 */
1149 for_each_rtd_components(rtd, i, component) {
1150 if (component->driver->trigger_start)
1151 start = component->driver->trigger_start;
1152 if (component->driver->trigger_stop)
1153 stop = component->driver->trigger_stop;
1154 }
1155 if (rtd->dai_link->trigger_start)
1156 start = rtd->dai_link->trigger_start;
1157 if (rtd->dai_link->trigger_stop)
1158 stop = rtd->dai_link->trigger_stop;
1159
1160 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1161 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX)
1162 return -EINVAL;
1163
1164 /*
1165 * START
1166 */
1167 switch (cmd) {
1168 case SNDRV_PCM_TRIGGER_START:
1169 case SNDRV_PCM_TRIGGER_RESUME:
1170 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1171 for (i = 0; i < TRIGGER_MAX; i++) {
1172 r = trigger[start][i](substream, cmd, 0);
1173 if (r < 0)
1174 break;
1175 }
1176 }
1177
1178 /*
1179 * Rollback if START failed
1180 * find correspond STOP command
1181 */
1182 if (r < 0) {
1183 rollback = 1;
1184 ret = r;
1185 switch (cmd) {
1186 case SNDRV_PCM_TRIGGER_START:
1187 cmd = SNDRV_PCM_TRIGGER_STOP;
1188 break;
1189 case SNDRV_PCM_TRIGGER_RESUME:
1190 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1191 break;
1192 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1193 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1194 break;
1195 }
1196 }
1197
1198 /*
1199 * STOP
1200 */
1201 switch (cmd) {
1202 case SNDRV_PCM_TRIGGER_STOP:
1203 case SNDRV_PCM_TRIGGER_SUSPEND:
1204 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1205 for (i = TRIGGER_MAX; i > 0; i--) {
1206 r = trigger[stop][i - 1](substream, cmd, rollback);
1207 if (r < 0)
1208 ret = r;
1209 }
1210 }
1211
1212 return ret;
1213}
1214
1215/*
1216 * soc level wrapper for pointer callback
1217 * If cpu_dai, codec_dai, component driver has the delay callback, then
1218 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1219 */
1220static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1221{
1222 struct snd_pcm_runtime *runtime = substream->runtime;
1223 snd_pcm_uframes_t offset = 0;
1224 snd_pcm_sframes_t codec_delay = 0;
1225 snd_pcm_sframes_t cpu_delay = 0;
1226
1227 offset = snd_soc_pcm_component_pointer(substream);
1228
1229 /* should be called *after* snd_soc_pcm_component_pointer() */
1230 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1231 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1232
1233 runtime->delay = cpu_delay + codec_delay;
1234
1235 return offset;
1236}
1237
1238/* connect a FE and BE */
1239static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1240 struct snd_soc_pcm_runtime *be, int stream)
1241{
1242 struct snd_pcm_substream *fe_substream;
1243 struct snd_pcm_substream *be_substream;
1244 struct snd_soc_dpcm *dpcm;
1245
1246 snd_soc_dpcm_mutex_assert_held(fe);
1247
1248 /* only add new dpcms */
1249 for_each_dpcm_be(fe, stream, dpcm) {
1250 if (dpcm->be == be && dpcm->fe == fe)
1251 return 0;
1252 }
1253
1254 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1255 be_substream = snd_soc_dpcm_get_substream(be, stream);
1256
1257 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1258 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1259 __func__);
1260 return -EINVAL;
1261 }
1262 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1263 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1264 be_substream->pcm->nonatomic = 1;
1265 }
1266
1267 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1268 if (!dpcm)
1269 return -ENOMEM;
1270
1271 dpcm->be = be;
1272 dpcm->fe = fe;
1273 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1274 snd_soc_dpcm_stream_lock_irq(fe, stream);
1275 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1276 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1277 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1278
1279 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1280 stream ? "capture" : "playback", fe->dai_link->name,
1281 stream ? "<-" : "->", be->dai_link->name);
1282
1283 dpcm_create_debugfs_state(dpcm, stream);
1284
1285 return 1;
1286}
1287
1288/* reparent a BE onto another FE */
1289static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1290 struct snd_soc_pcm_runtime *be, int stream)
1291{
1292 struct snd_soc_dpcm *dpcm;
1293 struct snd_pcm_substream *fe_substream, *be_substream;
1294
1295 /* reparent if BE is connected to other FEs */
1296 if (!be->dpcm[stream].users)
1297 return;
1298
1299 be_substream = snd_soc_dpcm_get_substream(be, stream);
1300 if (!be_substream)
1301 return;
1302
1303 for_each_dpcm_fe(be, stream, dpcm) {
1304 if (dpcm->fe == fe)
1305 continue;
1306
1307 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1308 stream ? "capture" : "playback",
1309 dpcm->fe->dai_link->name,
1310 stream ? "<-" : "->", dpcm->be->dai_link->name);
1311
1312 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1313 be_substream->runtime = fe_substream->runtime;
1314 break;
1315 }
1316}
1317
1318/* disconnect a BE and FE */
1319void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1320{
1321 struct snd_soc_dpcm *dpcm, *d;
1322 LIST_HEAD(deleted_dpcms);
1323
1324 snd_soc_dpcm_mutex_assert_held(fe);
1325
1326 snd_soc_dpcm_stream_lock_irq(fe, stream);
1327 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1328 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1329 stream ? "capture" : "playback",
1330 dpcm->be->dai_link->name);
1331
1332 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1333 continue;
1334
1335 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1336 stream ? "capture" : "playback", fe->dai_link->name,
1337 stream ? "<-" : "->", dpcm->be->dai_link->name);
1338
1339 /* BEs still alive need new FE */
1340 dpcm_be_reparent(fe, dpcm->be, stream);
1341
1342 list_del(&dpcm->list_be);
1343 list_move(&dpcm->list_fe, &deleted_dpcms);
1344 }
1345 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1346
1347 while (!list_empty(&deleted_dpcms)) {
1348 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1349 list_fe);
1350 list_del(&dpcm->list_fe);
1351 dpcm_remove_debugfs_state(dpcm);
1352 kfree(dpcm);
1353 }
1354}
1355
1356/* get BE for DAI widget and stream */
1357static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1358 struct snd_soc_dapm_widget *widget, int stream)
1359{
1360 struct snd_soc_pcm_runtime *be;
1361 struct snd_soc_dapm_widget *w;
1362 struct snd_soc_dai *dai;
1363 int i;
1364
1365 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1366
1367 for_each_card_rtds(card, be) {
1368
1369 if (!be->dai_link->no_pcm)
1370 continue;
1371
1372 if (!snd_soc_dpcm_get_substream(be, stream))
1373 continue;
1374
1375 for_each_rtd_dais(be, i, dai) {
1376 w = snd_soc_dai_get_widget(dai, stream);
1377
1378 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1379 w ? w->name : "(not set)");
1380
1381 if (w == widget)
1382 return be;
1383 }
1384 }
1385
1386 /* Widget provided is not a BE */
1387 return NULL;
1388}
1389
1390int widget_in_list(struct snd_soc_dapm_widget_list *list,
1391 struct snd_soc_dapm_widget *widget)
1392{
1393 struct snd_soc_dapm_widget *w;
1394 int i;
1395
1396 for_each_dapm_widgets(list, i, w)
1397 if (widget == w)
1398 return 1;
1399
1400 return 0;
1401}
1402EXPORT_SYMBOL_GPL(widget_in_list);
1403
1404bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1405{
1406 struct snd_soc_card *card = widget->dapm->card;
1407 struct snd_soc_pcm_runtime *rtd;
1408 int stream;
1409
1410 /* adjust dir to stream */
1411 if (dir == SND_SOC_DAPM_DIR_OUT)
1412 stream = SNDRV_PCM_STREAM_PLAYBACK;
1413 else
1414 stream = SNDRV_PCM_STREAM_CAPTURE;
1415
1416 rtd = dpcm_get_be(card, widget, stream);
1417 if (rtd)
1418 return true;
1419
1420 return false;
1421}
1422EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1423
1424int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1425 int stream, struct snd_soc_dapm_widget_list **list)
1426{
1427 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0);
1428 int paths;
1429
1430 if (fe->dai_link->num_cpus > 1) {
1431 dev_err(fe->dev,
1432 "%s doesn't support Multi CPU yet\n", __func__);
1433 return -EINVAL;
1434 }
1435
1436 /* get number of valid DAI paths and their widgets */
1437 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1438 fe->card->component_chaining ?
1439 NULL : dpcm_end_walk_at_be);
1440
1441 if (paths > 0)
1442 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1443 stream ? "capture" : "playback");
1444 else if (paths == 0)
1445 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1446 stream ? "capture" : "playback");
1447
1448 return paths;
1449}
1450
1451void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1452{
1453 snd_soc_dapm_dai_free_widgets(list);
1454}
1455
1456static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1457 struct snd_soc_dapm_widget_list *list)
1458{
1459 struct snd_soc_dai *dai;
1460 unsigned int i;
1461
1462 /* is there a valid DAI widget for this BE */
1463 for_each_rtd_dais(dpcm->be, i, dai) {
1464 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1465
1466 /*
1467 * The BE is pruned only if none of the dai
1468 * widgets are in the active list.
1469 */
1470 if (widget && widget_in_list(list, widget))
1471 return true;
1472 }
1473
1474 return false;
1475}
1476
1477static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1478 struct snd_soc_dapm_widget_list **list_)
1479{
1480 struct snd_soc_dpcm *dpcm;
1481 int prune = 0;
1482
1483 /* Destroy any old FE <--> BE connections */
1484 for_each_dpcm_be(fe, stream, dpcm) {
1485 if (dpcm_be_is_active(dpcm, stream, *list_))
1486 continue;
1487
1488 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1489 stream ? "capture" : "playback",
1490 dpcm->be->dai_link->name, fe->dai_link->name);
1491 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1492 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1493 prune++;
1494 }
1495
1496 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1497 return prune;
1498}
1499
1500static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1501 struct snd_soc_dapm_widget_list **list_)
1502{
1503 struct snd_soc_card *card = fe->card;
1504 struct snd_soc_dapm_widget_list *list = *list_;
1505 struct snd_soc_pcm_runtime *be;
1506 struct snd_soc_dapm_widget *widget;
1507 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1508 int i, new = 0, err;
1509
1510 /* don't connect if FE is not running */
1511 if (!fe_substream->runtime && !fe->fe_compr)
1512 return new;
1513
1514 /* Create any new FE <--> BE connections */
1515 for_each_dapm_widgets(list, i, widget) {
1516
1517 switch (widget->id) {
1518 case snd_soc_dapm_dai_in:
1519 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1520 continue;
1521 break;
1522 case snd_soc_dapm_dai_out:
1523 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1524 continue;
1525 break;
1526 default:
1527 continue;
1528 }
1529
1530 /* is there a valid BE rtd for this widget */
1531 be = dpcm_get_be(card, widget, stream);
1532 if (!be) {
1533 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1534 widget->name);
1535 continue;
1536 }
1537
1538 /*
1539 * Filter for systems with 'component_chaining' enabled.
1540 * This helps to avoid unnecessary re-configuration of an
1541 * already active BE on such systems.
1542 */
1543 if (fe->card->component_chaining &&
1544 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1545 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1546 continue;
1547
1548 /* newly connected FE and BE */
1549 err = dpcm_be_connect(fe, be, stream);
1550 if (err < 0) {
1551 dev_err(fe->dev, "ASoC: can't connect %s\n",
1552 widget->name);
1553 break;
1554 } else if (err == 0) /* already connected */
1555 continue;
1556
1557 /* new */
1558 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1559 new++;
1560 }
1561
1562 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1563 return new;
1564}
1565
1566/*
1567 * Find the corresponding BE DAIs that source or sink audio to this
1568 * FE substream.
1569 */
1570int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1571 int stream, struct snd_soc_dapm_widget_list **list, int new)
1572{
1573 if (new)
1574 return dpcm_add_paths(fe, stream, list);
1575 else
1576 return dpcm_prune_paths(fe, stream, list);
1577}
1578
1579void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1580{
1581 struct snd_soc_dpcm *dpcm;
1582
1583 for_each_dpcm_be(fe, stream, dpcm)
1584 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1585}
1586
1587void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1588 int do_hw_free, struct snd_soc_dpcm *last)
1589{
1590 struct snd_soc_dpcm *dpcm;
1591
1592 /* disable any enabled and non active backends */
1593 for_each_dpcm_be(fe, stream, dpcm) {
1594 struct snd_soc_pcm_runtime *be = dpcm->be;
1595 struct snd_pcm_substream *be_substream =
1596 snd_soc_dpcm_get_substream(be, stream);
1597
1598 if (dpcm == last)
1599 return;
1600
1601 /* is this op for this BE ? */
1602 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1603 continue;
1604
1605 if (be->dpcm[stream].users == 0) {
1606 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1607 stream ? "capture" : "playback",
1608 be->dpcm[stream].state);
1609 continue;
1610 }
1611
1612 if (--be->dpcm[stream].users != 0)
1613 continue;
1614
1615 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1616 if (!do_hw_free)
1617 continue;
1618
1619 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1620 __soc_pcm_hw_free(be, be_substream);
1621 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1622 }
1623 }
1624
1625 __soc_pcm_close(be, be_substream);
1626 be_substream->runtime = NULL;
1627 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1628 }
1629}
1630
1631int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1632{
1633 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1634 struct snd_soc_pcm_runtime *be;
1635 struct snd_soc_dpcm *dpcm;
1636 int err, count = 0;
1637
1638 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1639 for_each_dpcm_be(fe, stream, dpcm) {
1640 struct snd_pcm_substream *be_substream;
1641
1642 be = dpcm->be;
1643 be_substream = snd_soc_dpcm_get_substream(be, stream);
1644
1645 if (!be_substream) {
1646 dev_err(be->dev, "ASoC: no backend %s stream\n",
1647 stream ? "capture" : "playback");
1648 continue;
1649 }
1650
1651 /* is this op for this BE ? */
1652 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1653 continue;
1654
1655 /* first time the dpcm is open ? */
1656 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1657 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1658 stream ? "capture" : "playback",
1659 be->dpcm[stream].state);
1660 continue;
1661 }
1662
1663 if (be->dpcm[stream].users++ != 0)
1664 continue;
1665
1666 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1667 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1668 continue;
1669
1670 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1671 stream ? "capture" : "playback", be->dai_link->name);
1672
1673 be_substream->runtime = fe_substream->runtime;
1674 err = __soc_pcm_open(be, be_substream);
1675 if (err < 0) {
1676 be->dpcm[stream].users--;
1677 if (be->dpcm[stream].users < 0)
1678 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1679 stream ? "capture" : "playback",
1680 be->dpcm[stream].state);
1681
1682 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1683 goto unwind;
1684 }
1685 be->dpcm[stream].be_start = 0;
1686 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1687 count++;
1688 }
1689
1690 return count;
1691
1692unwind:
1693 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1694
1695 return soc_pcm_ret(fe, err);
1696}
1697
1698static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1699{
1700 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1701 struct snd_pcm_runtime *runtime = substream->runtime;
1702 struct snd_pcm_hardware *hw = &runtime->hw;
1703 struct snd_soc_dai *dai;
1704 int stream = substream->stream;
1705 u64 formats = hw->formats;
1706 int i;
1707
1708 soc_pcm_hw_init(hw);
1709
1710 if (formats)
1711 hw->formats &= formats;
1712
1713 for_each_rtd_cpu_dais(fe, i, dai) {
1714 struct snd_soc_pcm_stream *cpu_stream;
1715
1716 /*
1717 * Skip CPUs which don't support the current stream
1718 * type. See soc_pcm_init_runtime_hw() for more details
1719 */
1720 if (!snd_soc_dai_stream_valid(dai, stream))
1721 continue;
1722
1723 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1724
1725 soc_pcm_hw_update_rate(hw, cpu_stream);
1726 soc_pcm_hw_update_chan(hw, cpu_stream);
1727 soc_pcm_hw_update_format(hw, cpu_stream);
1728 soc_pcm_hw_update_subformat(hw, cpu_stream);
1729 }
1730
1731}
1732
1733static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1734{
1735 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1736 struct snd_pcm_runtime *runtime = substream->runtime;
1737 struct snd_pcm_hardware *hw = &runtime->hw;
1738 struct snd_soc_dpcm *dpcm;
1739 struct snd_soc_dai *dai;
1740 int stream = substream->stream;
1741
1742 if (!fe->dai_link->dpcm_merged_format)
1743 return;
1744
1745 /*
1746 * It returns merged BE codec format
1747 * if FE want to use it (= dpcm_merged_format)
1748 */
1749
1750 for_each_dpcm_be(fe, stream, dpcm) {
1751 struct snd_soc_pcm_runtime *be = dpcm->be;
1752 struct snd_soc_pcm_stream *codec_stream;
1753 int i;
1754
1755 for_each_rtd_codec_dais(be, i, dai) {
1756 /*
1757 * Skip CODECs which don't support the current stream
1758 * type. See soc_pcm_init_runtime_hw() for more details
1759 */
1760 if (!snd_soc_dai_stream_valid(dai, stream))
1761 continue;
1762
1763 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1764
1765 soc_pcm_hw_update_format(hw, codec_stream);
1766 soc_pcm_hw_update_subformat(hw, codec_stream);
1767 }
1768 }
1769}
1770
1771static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1772{
1773 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1774 struct snd_pcm_runtime *runtime = substream->runtime;
1775 struct snd_pcm_hardware *hw = &runtime->hw;
1776 struct snd_soc_dpcm *dpcm;
1777 int stream = substream->stream;
1778
1779 if (!fe->dai_link->dpcm_merged_chan)
1780 return;
1781
1782 /*
1783 * It returns merged BE codec channel;
1784 * if FE want to use it (= dpcm_merged_chan)
1785 */
1786
1787 for_each_dpcm_be(fe, stream, dpcm) {
1788 struct snd_soc_pcm_runtime *be = dpcm->be;
1789 struct snd_soc_pcm_stream *cpu_stream;
1790 struct snd_soc_dai *dai;
1791 int i;
1792
1793 for_each_rtd_cpu_dais(be, i, dai) {
1794 /*
1795 * Skip CPUs which don't support the current stream
1796 * type. See soc_pcm_init_runtime_hw() for more details
1797 */
1798 if (!snd_soc_dai_stream_valid(dai, stream))
1799 continue;
1800
1801 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1802
1803 soc_pcm_hw_update_chan(hw, cpu_stream);
1804 }
1805
1806 /*
1807 * chan min/max cannot be enforced if there are multiple CODEC
1808 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1809 */
1810 if (be->dai_link->num_codecs == 1) {
1811 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1812 snd_soc_rtd_to_codec(be, 0), stream);
1813
1814 soc_pcm_hw_update_chan(hw, codec_stream);
1815 }
1816 }
1817}
1818
1819static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1820{
1821 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1822 struct snd_pcm_runtime *runtime = substream->runtime;
1823 struct snd_pcm_hardware *hw = &runtime->hw;
1824 struct snd_soc_dpcm *dpcm;
1825 int stream = substream->stream;
1826
1827 if (!fe->dai_link->dpcm_merged_rate)
1828 return;
1829
1830 /*
1831 * It returns merged BE codec channel;
1832 * if FE want to use it (= dpcm_merged_chan)
1833 */
1834
1835 for_each_dpcm_be(fe, stream, dpcm) {
1836 struct snd_soc_pcm_runtime *be = dpcm->be;
1837 struct snd_soc_pcm_stream *pcm;
1838 struct snd_soc_dai *dai;
1839 int i;
1840
1841 for_each_rtd_dais(be, i, dai) {
1842 /*
1843 * Skip DAIs which don't support the current stream
1844 * type. See soc_pcm_init_runtime_hw() for more details
1845 */
1846 if (!snd_soc_dai_stream_valid(dai, stream))
1847 continue;
1848
1849 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1850
1851 soc_pcm_hw_update_rate(hw, pcm);
1852 }
1853 }
1854}
1855
1856static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1857 int stream)
1858{
1859 struct snd_soc_dpcm *dpcm;
1860 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1861 struct snd_soc_dai *fe_cpu_dai;
1862 int err = 0;
1863 int i;
1864
1865 /* apply symmetry for FE */
1866 soc_pcm_update_symmetry(fe_substream);
1867
1868 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1869 /* Symmetry only applies if we've got an active stream. */
1870 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1871 if (err < 0)
1872 goto error;
1873 }
1874
1875 /* apply symmetry for BE */
1876 for_each_dpcm_be(fe, stream, dpcm) {
1877 struct snd_soc_pcm_runtime *be = dpcm->be;
1878 struct snd_pcm_substream *be_substream =
1879 snd_soc_dpcm_get_substream(be, stream);
1880 struct snd_soc_pcm_runtime *rtd;
1881 struct snd_soc_dai *dai;
1882
1883 /* A backend may not have the requested substream */
1884 if (!be_substream)
1885 continue;
1886
1887 rtd = snd_soc_substream_to_rtd(be_substream);
1888 if (rtd->dai_link->be_hw_params_fixup)
1889 continue;
1890
1891 soc_pcm_update_symmetry(be_substream);
1892
1893 /* Symmetry only applies if we've got an active stream. */
1894 for_each_rtd_dais(rtd, i, dai) {
1895 err = soc_pcm_apply_symmetry(fe_substream, dai);
1896 if (err < 0)
1897 goto error;
1898 }
1899 }
1900error:
1901 return soc_pcm_ret(fe, err);
1902}
1903
1904static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1905{
1906 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1907 int stream = fe_substream->stream, ret = 0;
1908
1909 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1910
1911 ret = dpcm_be_dai_startup(fe, stream);
1912 if (ret < 0)
1913 goto be_err;
1914
1915 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1916
1917 /* start the DAI frontend */
1918 ret = __soc_pcm_open(fe, fe_substream);
1919 if (ret < 0)
1920 goto unwind;
1921
1922 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1923
1924 dpcm_runtime_setup_fe(fe_substream);
1925
1926 dpcm_runtime_setup_be_format(fe_substream);
1927 dpcm_runtime_setup_be_chan(fe_substream);
1928 dpcm_runtime_setup_be_rate(fe_substream);
1929
1930 ret = dpcm_apply_symmetry(fe_substream, stream);
1931
1932unwind:
1933 if (ret < 0)
1934 dpcm_be_dai_startup_unwind(fe, stream);
1935be_err:
1936 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1937
1938 return soc_pcm_ret(fe, ret);
1939}
1940
1941static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1942{
1943 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1944 int stream = substream->stream;
1945
1946 snd_soc_dpcm_mutex_assert_held(fe);
1947
1948 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1949
1950 /* shutdown the BEs */
1951 dpcm_be_dai_shutdown(fe, stream);
1952
1953 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1954
1955 /* now shutdown the frontend */
1956 __soc_pcm_close(fe, substream);
1957
1958 /* run the stream stop event */
1959 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1960
1961 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1962 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1963 return 0;
1964}
1965
1966void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1967{
1968 struct snd_soc_dpcm *dpcm;
1969
1970 /* only hw_params backends that are either sinks or sources
1971 * to this frontend DAI */
1972 for_each_dpcm_be(fe, stream, dpcm) {
1973
1974 struct snd_soc_pcm_runtime *be = dpcm->be;
1975 struct snd_pcm_substream *be_substream =
1976 snd_soc_dpcm_get_substream(be, stream);
1977
1978 /* is this op for this BE ? */
1979 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1980 continue;
1981
1982 /* only free hw when no longer used - check all FEs */
1983 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1984 continue;
1985
1986 /* do not free hw if this BE is used by other FE */
1987 if (be->dpcm[stream].users > 1)
1988 continue;
1989
1990 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1991 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1992 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1993 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1994 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1995 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1996 continue;
1997
1998 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1999 be->dai_link->name);
2000
2001 __soc_pcm_hw_free(be, be_substream);
2002
2003 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2004 }
2005}
2006
2007static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2008{
2009 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2010 int stream = substream->stream;
2011
2012 snd_soc_dpcm_mutex_lock(fe);
2013 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2014
2015 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2016
2017 /* call hw_free on the frontend */
2018 soc_pcm_hw_clean(fe, substream, 0);
2019
2020 /* only hw_params backends that are either sinks or sources
2021 * to this frontend DAI */
2022 dpcm_be_dai_hw_free(fe, stream);
2023
2024 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2025 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2026
2027 snd_soc_dpcm_mutex_unlock(fe);
2028 return 0;
2029}
2030
2031int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2032{
2033 struct snd_soc_pcm_runtime *be;
2034 struct snd_pcm_substream *be_substream;
2035 struct snd_soc_dpcm *dpcm;
2036 int ret;
2037
2038 for_each_dpcm_be(fe, stream, dpcm) {
2039 struct snd_pcm_hw_params hw_params;
2040
2041 be = dpcm->be;
2042 be_substream = snd_soc_dpcm_get_substream(be, stream);
2043
2044 /* is this op for this BE ? */
2045 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2046 continue;
2047
2048 /* copy params for each dpcm */
2049 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
2050 sizeof(struct snd_pcm_hw_params));
2051
2052 /* perform any hw_params fixups */
2053 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2054 if (ret < 0)
2055 goto unwind;
2056
2057 /* copy the fixed-up hw params for BE dai */
2058 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2059 sizeof(struct snd_pcm_hw_params));
2060
2061 /* only allow hw_params() if no connected FEs are running */
2062 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2063 continue;
2064
2065 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2066 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2067 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2068 continue;
2069
2070 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2071 be->dai_link->name);
2072
2073 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2074 if (ret < 0)
2075 goto unwind;
2076
2077 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2078 }
2079 return 0;
2080
2081unwind:
2082 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2083 __func__, be->dai_link->name, ret);
2084
2085 /* disable any enabled and non active backends */
2086 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2087 be = dpcm->be;
2088 be_substream = snd_soc_dpcm_get_substream(be, stream);
2089
2090 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2091 continue;
2092
2093 /* only allow hw_free() if no connected FEs are running */
2094 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2095 continue;
2096
2097 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2098 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2099 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2100 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2101 continue;
2102
2103 __soc_pcm_hw_free(be, be_substream);
2104 }
2105
2106 return ret;
2107}
2108
2109static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2110 struct snd_pcm_hw_params *params)
2111{
2112 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2113 int ret, stream = substream->stream;
2114
2115 snd_soc_dpcm_mutex_lock(fe);
2116 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2117
2118 memcpy(&fe->dpcm[stream].hw_params, params,
2119 sizeof(struct snd_pcm_hw_params));
2120 ret = dpcm_be_dai_hw_params(fe, stream);
2121 if (ret < 0)
2122 goto out;
2123
2124 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2125 fe->dai_link->name, params_rate(params),
2126 params_channels(params), params_format(params));
2127
2128 /* call hw_params on the frontend */
2129 ret = __soc_pcm_hw_params(fe, substream, params);
2130 if (ret < 0)
2131 dpcm_be_dai_hw_free(fe, stream);
2132 else
2133 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2134
2135out:
2136 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2137 snd_soc_dpcm_mutex_unlock(fe);
2138
2139 return soc_pcm_ret(fe, ret);
2140}
2141
2142int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2143 int cmd)
2144{
2145 struct snd_soc_pcm_runtime *be;
2146 bool pause_stop_transition;
2147 struct snd_soc_dpcm *dpcm;
2148 unsigned long flags;
2149 int ret = 0;
2150
2151 for_each_dpcm_be(fe, stream, dpcm) {
2152 struct snd_pcm_substream *be_substream;
2153
2154 be = dpcm->be;
2155 be_substream = snd_soc_dpcm_get_substream(be, stream);
2156
2157 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
2158
2159 /* is this op for this BE ? */
2160 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2161 goto next;
2162
2163 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2164 be->dai_link->name, cmd);
2165
2166 switch (cmd) {
2167 case SNDRV_PCM_TRIGGER_START:
2168 if (!be->dpcm[stream].be_start &&
2169 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2170 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2171 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2172 goto next;
2173
2174 be->dpcm[stream].be_start++;
2175 if (be->dpcm[stream].be_start != 1)
2176 goto next;
2177
2178 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2179 ret = soc_pcm_trigger(be_substream,
2180 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2181 else
2182 ret = soc_pcm_trigger(be_substream,
2183 SNDRV_PCM_TRIGGER_START);
2184 if (ret) {
2185 be->dpcm[stream].be_start--;
2186 goto next;
2187 }
2188
2189 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2190 break;
2191 case SNDRV_PCM_TRIGGER_RESUME:
2192 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2193 goto next;
2194
2195 be->dpcm[stream].be_start++;
2196 if (be->dpcm[stream].be_start != 1)
2197 goto next;
2198
2199 ret = soc_pcm_trigger(be_substream, cmd);
2200 if (ret) {
2201 be->dpcm[stream].be_start--;
2202 goto next;
2203 }
2204
2205 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2206 break;
2207 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2208 if (!be->dpcm[stream].be_start &&
2209 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2210 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2211 goto next;
2212
2213 fe->dpcm[stream].fe_pause = false;
2214 be->dpcm[stream].be_pause--;
2215
2216 be->dpcm[stream].be_start++;
2217 if (be->dpcm[stream].be_start != 1)
2218 goto next;
2219
2220 ret = soc_pcm_trigger(be_substream, cmd);
2221 if (ret) {
2222 be->dpcm[stream].be_start--;
2223 goto next;
2224 }
2225
2226 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2227 break;
2228 case SNDRV_PCM_TRIGGER_STOP:
2229 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2230 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2231 goto next;
2232
2233 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2234 be->dpcm[stream].be_start--;
2235
2236 if (be->dpcm[stream].be_start != 0)
2237 goto next;
2238
2239 pause_stop_transition = false;
2240 if (fe->dpcm[stream].fe_pause) {
2241 pause_stop_transition = true;
2242 fe->dpcm[stream].fe_pause = false;
2243 be->dpcm[stream].be_pause--;
2244 }
2245
2246 if (be->dpcm[stream].be_pause != 0)
2247 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2248 else
2249 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2250
2251 if (ret) {
2252 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2253 be->dpcm[stream].be_start++;
2254 if (pause_stop_transition) {
2255 fe->dpcm[stream].fe_pause = true;
2256 be->dpcm[stream].be_pause++;
2257 }
2258 goto next;
2259 }
2260
2261 if (be->dpcm[stream].be_pause != 0)
2262 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2263 else
2264 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2265
2266 break;
2267 case SNDRV_PCM_TRIGGER_SUSPEND:
2268 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2269 goto next;
2270
2271 be->dpcm[stream].be_start--;
2272 if (be->dpcm[stream].be_start != 0)
2273 goto next;
2274
2275 ret = soc_pcm_trigger(be_substream, cmd);
2276 if (ret) {
2277 be->dpcm[stream].be_start++;
2278 goto next;
2279 }
2280
2281 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2282 break;
2283 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2284 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2285 goto next;
2286
2287 fe->dpcm[stream].fe_pause = true;
2288 be->dpcm[stream].be_pause++;
2289
2290 be->dpcm[stream].be_start--;
2291 if (be->dpcm[stream].be_start != 0)
2292 goto next;
2293
2294 ret = soc_pcm_trigger(be_substream, cmd);
2295 if (ret) {
2296 be->dpcm[stream].be_start++;
2297 goto next;
2298 }
2299
2300 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2301 break;
2302 }
2303next:
2304 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2305 if (ret)
2306 break;
2307 }
2308 return soc_pcm_ret(fe, ret);
2309}
2310EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2311
2312static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2313 int cmd, bool fe_first)
2314{
2315 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2316 int ret;
2317
2318 /* call trigger on the frontend before the backend. */
2319 if (fe_first) {
2320 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2321 fe->dai_link->name, cmd);
2322
2323 ret = soc_pcm_trigger(substream, cmd);
2324 if (ret < 0)
2325 return ret;
2326
2327 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2328 return ret;
2329 }
2330
2331 /* call trigger on the frontend after the backend. */
2332 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2333 if (ret < 0)
2334 return ret;
2335
2336 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2337 fe->dai_link->name, cmd);
2338
2339 ret = soc_pcm_trigger(substream, cmd);
2340
2341 return ret;
2342}
2343
2344static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2345{
2346 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2347 int stream = substream->stream;
2348 int ret = 0;
2349 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2350
2351 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2352
2353 switch (trigger) {
2354 case SND_SOC_DPCM_TRIGGER_PRE:
2355 switch (cmd) {
2356 case SNDRV_PCM_TRIGGER_START:
2357 case SNDRV_PCM_TRIGGER_RESUME:
2358 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2359 case SNDRV_PCM_TRIGGER_DRAIN:
2360 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2361 break;
2362 case SNDRV_PCM_TRIGGER_STOP:
2363 case SNDRV_PCM_TRIGGER_SUSPEND:
2364 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2365 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2366 break;
2367 default:
2368 ret = -EINVAL;
2369 break;
2370 }
2371 break;
2372 case SND_SOC_DPCM_TRIGGER_POST:
2373 switch (cmd) {
2374 case SNDRV_PCM_TRIGGER_START:
2375 case SNDRV_PCM_TRIGGER_RESUME:
2376 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2377 case SNDRV_PCM_TRIGGER_DRAIN:
2378 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2379 break;
2380 case SNDRV_PCM_TRIGGER_STOP:
2381 case SNDRV_PCM_TRIGGER_SUSPEND:
2382 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2383 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2384 break;
2385 default:
2386 ret = -EINVAL;
2387 break;
2388 }
2389 break;
2390 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2391 /* bespoke trigger() - handles both FE and BEs */
2392
2393 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2394 fe->dai_link->name, cmd);
2395
2396 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2397 break;
2398 default:
2399 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2400 fe->dai_link->name);
2401 ret = -EINVAL;
2402 goto out;
2403 }
2404
2405 if (ret < 0) {
2406 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2407 cmd, ret);
2408 goto out;
2409 }
2410
2411 switch (cmd) {
2412 case SNDRV_PCM_TRIGGER_START:
2413 case SNDRV_PCM_TRIGGER_RESUME:
2414 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2415 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2416 break;
2417 case SNDRV_PCM_TRIGGER_STOP:
2418 case SNDRV_PCM_TRIGGER_SUSPEND:
2419 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2420 break;
2421 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2422 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2423 break;
2424 }
2425
2426out:
2427 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2428 return ret;
2429}
2430
2431static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2432{
2433 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2434 int stream = substream->stream;
2435
2436 /* if FE's runtime_update is already set, we're in race;
2437 * process this trigger later at exit
2438 */
2439 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2440 fe->dpcm[stream].trigger_pending = cmd + 1;
2441 return 0; /* delayed, assuming it's successful */
2442 }
2443
2444 /* we're alone, let's trigger */
2445 return dpcm_fe_dai_do_trigger(substream, cmd);
2446}
2447
2448int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2449{
2450 struct snd_soc_dpcm *dpcm;
2451 int ret = 0;
2452
2453 for_each_dpcm_be(fe, stream, dpcm) {
2454
2455 struct snd_soc_pcm_runtime *be = dpcm->be;
2456 struct snd_pcm_substream *be_substream =
2457 snd_soc_dpcm_get_substream(be, stream);
2458
2459 /* is this op for this BE ? */
2460 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2461 continue;
2462
2463 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2464 continue;
2465
2466 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2467 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2468 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2469 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2470 continue;
2471
2472 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2473 be->dai_link->name);
2474
2475 ret = __soc_pcm_prepare(be, be_substream);
2476 if (ret < 0)
2477 break;
2478
2479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2480 }
2481
2482 return soc_pcm_ret(fe, ret);
2483}
2484
2485static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2486{
2487 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2488 int stream = substream->stream, ret = 0;
2489
2490 snd_soc_dpcm_mutex_lock(fe);
2491
2492 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2493
2494 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2495
2496 /* there is no point preparing this FE if there are no BEs */
2497 if (list_empty(&fe->dpcm[stream].be_clients)) {
2498 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2499 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2500 fe->dai_link->name);
2501 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2502 fe->dai_link->name);
2503 ret = -EINVAL;
2504 goto out;
2505 }
2506
2507 ret = dpcm_be_dai_prepare(fe, stream);
2508 if (ret < 0)
2509 goto out;
2510
2511 /* call prepare on the frontend */
2512 ret = __soc_pcm_prepare(fe, substream);
2513 if (ret < 0)
2514 goto out;
2515
2516 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2517
2518out:
2519 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2520 snd_soc_dpcm_mutex_unlock(fe);
2521
2522 return soc_pcm_ret(fe, ret);
2523}
2524
2525static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2526{
2527 struct snd_pcm_substream *substream =
2528 snd_soc_dpcm_get_substream(fe, stream);
2529 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2530 int err;
2531
2532 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2533 stream ? "capture" : "playback", fe->dai_link->name);
2534
2535 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2536 /* call bespoke trigger - FE takes care of all BE triggers */
2537 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2538 fe->dai_link->name);
2539
2540 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2541 } else {
2542 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2543 fe->dai_link->name);
2544
2545 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2546 }
2547
2548 dpcm_be_dai_hw_free(fe, stream);
2549
2550 dpcm_be_dai_shutdown(fe, stream);
2551
2552 /* run the stream event for each BE */
2553 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2554
2555 return soc_pcm_ret(fe, err);
2556}
2557
2558static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2559{
2560 struct snd_pcm_substream *substream =
2561 snd_soc_dpcm_get_substream(fe, stream);
2562 struct snd_soc_dpcm *dpcm;
2563 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2564 int ret = 0;
2565
2566 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2567 stream ? "capture" : "playback", fe->dai_link->name);
2568
2569 /* Only start the BE if the FE is ready */
2570 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2571 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2572 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2573 fe->dai_link->name, fe->dpcm[stream].state);
2574 ret = -EINVAL;
2575 goto disconnect;
2576 }
2577
2578 /* startup must always be called for new BEs */
2579 ret = dpcm_be_dai_startup(fe, stream);
2580 if (ret < 0)
2581 goto disconnect;
2582
2583 /* keep going if FE state is > open */
2584 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2585 return 0;
2586
2587 ret = dpcm_be_dai_hw_params(fe, stream);
2588 if (ret < 0)
2589 goto close;
2590
2591 /* keep going if FE state is > hw_params */
2592 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2593 return 0;
2594
2595 ret = dpcm_be_dai_prepare(fe, stream);
2596 if (ret < 0)
2597 goto hw_free;
2598
2599 /* run the stream event for each BE */
2600 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2601
2602 /* keep going if FE state is > prepare */
2603 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2604 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2605 return 0;
2606
2607 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2608 /* call trigger on the frontend - FE takes care of all BE triggers */
2609 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2610 fe->dai_link->name);
2611
2612 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2613 if (ret < 0)
2614 goto hw_free;
2615 } else {
2616 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2617 fe->dai_link->name);
2618
2619 ret = dpcm_be_dai_trigger(fe, stream,
2620 SNDRV_PCM_TRIGGER_START);
2621 if (ret < 0)
2622 goto hw_free;
2623 }
2624
2625 return 0;
2626
2627hw_free:
2628 dpcm_be_dai_hw_free(fe, stream);
2629close:
2630 dpcm_be_dai_shutdown(fe, stream);
2631disconnect:
2632 /* disconnect any pending BEs */
2633 for_each_dpcm_be(fe, stream, dpcm) {
2634 struct snd_soc_pcm_runtime *be = dpcm->be;
2635
2636 /* is this op for this BE ? */
2637 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2638 continue;
2639
2640 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2641 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2642 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2643 }
2644
2645 return soc_pcm_ret(fe, ret);
2646}
2647
2648static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2649{
2650 struct snd_soc_dapm_widget_list *list;
2651 int stream;
2652 int count, paths;
2653
2654 if (!fe->dai_link->dynamic)
2655 return 0;
2656
2657 if (fe->dai_link->num_cpus > 1) {
2658 dev_err(fe->dev,
2659 "%s doesn't support Multi CPU yet\n", __func__);
2660 return -EINVAL;
2661 }
2662
2663 /* only check active links */
2664 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0)))
2665 return 0;
2666
2667 /* DAPM sync will call this to update DSP paths */
2668 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2669 new ? "new" : "old", fe->dai_link->name);
2670
2671 for_each_pcm_streams(stream) {
2672
2673 /* skip if FE doesn't have playback/capture capability */
2674 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2675 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream))
2676 continue;
2677
2678 /* skip if FE isn't currently playing/capturing */
2679 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2680 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream))
2681 continue;
2682
2683 paths = dpcm_path_get(fe, stream, &list);
2684 if (paths < 0)
2685 return paths;
2686
2687 /* update any playback/capture paths */
2688 count = dpcm_process_paths(fe, stream, &list, new);
2689 if (count) {
2690 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2691 if (new)
2692 dpcm_run_update_startup(fe, stream);
2693 else
2694 dpcm_run_update_shutdown(fe, stream);
2695 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2696
2697 dpcm_clear_pending_state(fe, stream);
2698 dpcm_be_disconnect(fe, stream);
2699 }
2700
2701 dpcm_path_put(&list);
2702 }
2703
2704 return 0;
2705}
2706
2707/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2708 * any DAI links.
2709 */
2710int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2711{
2712 struct snd_soc_pcm_runtime *fe;
2713 int ret = 0;
2714
2715 snd_soc_dpcm_mutex_lock(card);
2716 /* shutdown all old paths first */
2717 for_each_card_rtds(card, fe) {
2718 ret = soc_dpcm_fe_runtime_update(fe, 0);
2719 if (ret)
2720 goto out;
2721 }
2722
2723 /* bring new paths up */
2724 for_each_card_rtds(card, fe) {
2725 ret = soc_dpcm_fe_runtime_update(fe, 1);
2726 if (ret)
2727 goto out;
2728 }
2729
2730out:
2731 snd_soc_dpcm_mutex_unlock(card);
2732 return ret;
2733}
2734EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2735
2736static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2737{
2738 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2739 struct snd_soc_dpcm *dpcm;
2740 int stream = fe_substream->stream;
2741
2742 snd_soc_dpcm_mutex_assert_held(fe);
2743
2744 /* mark FE's links ready to prune */
2745 for_each_dpcm_be(fe, stream, dpcm)
2746 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2747
2748 dpcm_be_disconnect(fe, stream);
2749}
2750
2751static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2752{
2753 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2754 int ret;
2755
2756 snd_soc_dpcm_mutex_lock(fe);
2757 ret = dpcm_fe_dai_shutdown(fe_substream);
2758
2759 dpcm_fe_dai_cleanup(fe_substream);
2760
2761 snd_soc_dpcm_mutex_unlock(fe);
2762 return ret;
2763}
2764
2765static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2766{
2767 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2768 struct snd_soc_dapm_widget_list *list;
2769 int ret;
2770 int stream = fe_substream->stream;
2771
2772 snd_soc_dpcm_mutex_lock(fe);
2773
2774 ret = dpcm_path_get(fe, stream, &list);
2775 if (ret < 0)
2776 goto open_end;
2777
2778 /* calculate valid and active FE <-> BE dpcms */
2779 dpcm_process_paths(fe, stream, &list, 1);
2780
2781 ret = dpcm_fe_dai_startup(fe_substream);
2782 if (ret < 0)
2783 dpcm_fe_dai_cleanup(fe_substream);
2784
2785 dpcm_clear_pending_state(fe, stream);
2786 dpcm_path_put(&list);
2787open_end:
2788 snd_soc_dpcm_mutex_unlock(fe);
2789 return ret;
2790}
2791
2792static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2793 int *playback, int *capture)
2794{
2795 struct snd_soc_dai_link *dai_link = rtd->dai_link;
2796 struct snd_soc_dai *cpu_dai;
2797 int has_playback = 0;
2798 int has_capture = 0;
2799 int i;
2800
2801 if (dai_link->dynamic && dai_link->num_cpus > 1) {
2802 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2803 return -EINVAL;
2804 }
2805
2806 if (dai_link->dynamic || dai_link->no_pcm) {
2807 int stream;
2808
2809 if (dai_link->dpcm_playback) {
2810 stream = SNDRV_PCM_STREAM_PLAYBACK;
2811
2812 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2813 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2814 has_playback = 1;
2815 break;
2816 }
2817 }
2818 if (!has_playback) {
2819 dev_err(rtd->card->dev,
2820 "No CPU DAIs support playback for stream %s\n",
2821 dai_link->stream_name);
2822 return -EINVAL;
2823 }
2824 }
2825 if (dai_link->dpcm_capture) {
2826 stream = SNDRV_PCM_STREAM_CAPTURE;
2827
2828 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2829 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2830 has_capture = 1;
2831 break;
2832 }
2833 }
2834
2835 if (!has_capture) {
2836 dev_err(rtd->card->dev,
2837 "No CPU DAIs support capture for stream %s\n",
2838 dai_link->stream_name);
2839 return -EINVAL;
2840 }
2841 }
2842 } else {
2843 struct snd_soc_dai_link_ch_map *ch_maps;
2844 struct snd_soc_dai *codec_dai;
2845
2846 /* Adapt stream for codec2codec links */
2847 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2848 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
2849
2850 /*
2851 * see
2852 * soc.h :: [dai_link->ch_maps Image sample]
2853 */
2854 for_each_rtd_ch_maps(rtd, i, ch_maps) {
2855 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu);
2856 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
2857
2858 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2859 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2860 has_playback = 1;
2861 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2862 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2863 has_capture = 1;
2864 }
2865 }
2866
2867 if (dai_link->playback_only)
2868 has_capture = 0;
2869
2870 if (dai_link->capture_only)
2871 has_playback = 0;
2872
2873 if (!has_playback && !has_capture) {
2874 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
2875 dai_link->stream_name);
2876
2877 return -EINVAL;
2878 }
2879
2880 *playback = has_playback;
2881 *capture = has_capture;
2882
2883 return 0;
2884}
2885
2886static int soc_create_pcm(struct snd_pcm **pcm,
2887 struct snd_soc_pcm_runtime *rtd,
2888 int playback, int capture, int num)
2889{
2890 char new_name[64];
2891 int ret;
2892
2893 /* create the PCM */
2894 if (rtd->dai_link->c2c_params) {
2895 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2896 rtd->dai_link->stream_name);
2897
2898 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2899 playback, capture, pcm);
2900 } else if (rtd->dai_link->no_pcm) {
2901 snprintf(new_name, sizeof(new_name), "(%s)",
2902 rtd->dai_link->stream_name);
2903
2904 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2905 playback, capture, pcm);
2906 } else {
2907 if (rtd->dai_link->dynamic)
2908 snprintf(new_name, sizeof(new_name), "%s (*)",
2909 rtd->dai_link->stream_name);
2910 else
2911 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2912 rtd->dai_link->stream_name,
2913 soc_codec_dai_name(rtd), num);
2914
2915 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2916 capture, pcm);
2917 }
2918 if (ret < 0) {
2919 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2920 new_name, rtd->dai_link->name, ret);
2921 return ret;
2922 }
2923 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2924
2925 return 0;
2926}
2927
2928/* create a new pcm */
2929int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2930{
2931 struct snd_soc_component *component;
2932 struct snd_pcm *pcm;
2933 int ret = 0, playback = 0, capture = 0;
2934 int i;
2935
2936 ret = soc_get_playback_capture(rtd, &playback, &capture);
2937 if (ret < 0)
2938 return ret;
2939
2940 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2941 if (ret < 0)
2942 return ret;
2943
2944 /* DAPM dai link stream work */
2945 /*
2946 * Currently nothing to do for c2c links
2947 * Since c2c links are internal nodes in the DAPM graph and
2948 * don't interface with the outside world or application layer
2949 * we don't have to do any special handling on close.
2950 */
2951 if (!rtd->dai_link->c2c_params)
2952 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2953
2954 rtd->pcm = pcm;
2955 pcm->nonatomic = rtd->dai_link->nonatomic;
2956 pcm->private_data = rtd;
2957 pcm->no_device_suspend = true;
2958
2959 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2960 if (playback)
2961 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2962 if (capture)
2963 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2964 goto out;
2965 }
2966
2967 /* ASoC PCM operations */
2968 if (rtd->dai_link->dynamic) {
2969 rtd->ops.open = dpcm_fe_dai_open;
2970 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2971 rtd->ops.prepare = dpcm_fe_dai_prepare;
2972 rtd->ops.trigger = dpcm_fe_dai_trigger;
2973 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2974 rtd->ops.close = dpcm_fe_dai_close;
2975 rtd->ops.pointer = soc_pcm_pointer;
2976 } else {
2977 rtd->ops.open = soc_pcm_open;
2978 rtd->ops.hw_params = soc_pcm_hw_params;
2979 rtd->ops.prepare = soc_pcm_prepare;
2980 rtd->ops.trigger = soc_pcm_trigger;
2981 rtd->ops.hw_free = soc_pcm_hw_free;
2982 rtd->ops.close = soc_pcm_close;
2983 rtd->ops.pointer = soc_pcm_pointer;
2984 }
2985
2986 for_each_rtd_components(rtd, i, component) {
2987 const struct snd_soc_component_driver *drv = component->driver;
2988
2989 if (drv->ioctl)
2990 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2991 if (drv->sync_stop)
2992 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2993 if (drv->copy)
2994 rtd->ops.copy = snd_soc_pcm_component_copy;
2995 if (drv->page)
2996 rtd->ops.page = snd_soc_pcm_component_page;
2997 if (drv->mmap)
2998 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2999 if (drv->ack)
3000 rtd->ops.ack = snd_soc_pcm_component_ack;
3001 }
3002
3003 if (playback)
3004 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3005
3006 if (capture)
3007 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3008
3009 ret = snd_soc_pcm_component_new(rtd);
3010 if (ret < 0)
3011 return ret;
3012out:
3013 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
3014 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
3015 return ret;
3016}
3017
3018/* is the current PCM operation for this FE ? */
3019int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3020{
3021 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3022 return 1;
3023 return 0;
3024}
3025EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3026
3027/* is the current PCM operation for this BE ? */
3028int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3029 struct snd_soc_pcm_runtime *be, int stream)
3030{
3031 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3032 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3033 be->dpcm[stream].runtime_update))
3034 return 1;
3035 return 0;
3036}
3037EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3038
3039/* get the substream for this BE */
3040struct snd_pcm_substream *
3041 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3042{
3043 return be->pcm->streams[stream].substream;
3044}
3045EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3046
3047static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3048 struct snd_soc_pcm_runtime *be,
3049 int stream,
3050 const enum snd_soc_dpcm_state *states,
3051 int num_states)
3052{
3053 struct snd_soc_dpcm *dpcm;
3054 int state;
3055 int ret = 1;
3056 int i;
3057
3058 for_each_dpcm_fe(be, stream, dpcm) {
3059
3060 if (dpcm->fe == fe)
3061 continue;
3062
3063 state = dpcm->fe->dpcm[stream].state;
3064 for (i = 0; i < num_states; i++) {
3065 if (state == states[i]) {
3066 ret = 0;
3067 break;
3068 }
3069 }
3070 }
3071
3072 /* it's safe to do this BE DAI */
3073 return ret;
3074}
3075
3076/*
3077 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3078 * are not running, paused or suspended for the specified stream direction.
3079 */
3080int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3081 struct snd_soc_pcm_runtime *be, int stream)
3082{
3083 const enum snd_soc_dpcm_state state[] = {
3084 SND_SOC_DPCM_STATE_START,
3085 SND_SOC_DPCM_STATE_PAUSED,
3086 SND_SOC_DPCM_STATE_SUSPEND,
3087 };
3088
3089 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3090}
3091EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3092
3093/*
3094 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3095 * running, paused or suspended for the specified stream direction.
3096 */
3097int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3098 struct snd_soc_pcm_runtime *be, int stream)
3099{
3100 const enum snd_soc_dpcm_state state[] = {
3101 SND_SOC_DPCM_STATE_START,
3102 SND_SOC_DPCM_STATE_PAUSED,
3103 SND_SOC_DPCM_STATE_SUSPEND,
3104 SND_SOC_DPCM_STATE_PREPARE,
3105 };
3106
3107 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3108}
3109EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3110
3111/*
3112 * We can only prepare a BE DAI if any of it's FE are not prepared,
3113 * running or paused for the specified stream direction.
3114 */
3115int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3116 struct snd_soc_pcm_runtime *be, int stream)
3117{
3118 const enum snd_soc_dpcm_state state[] = {
3119 SND_SOC_DPCM_STATE_START,
3120 SND_SOC_DPCM_STATE_PAUSED,
3121 SND_SOC_DPCM_STATE_PREPARE,
3122 };
3123
3124 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3125}
3126EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);