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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/*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/delay.h>
22#include <linux/slab.h>
23#include <linux/workqueue.h>
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/soc.h>
28#include <sound/initval.h>
29
30static DEFINE_MUTEX(pcm_mutex);
31
32static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
33{
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
36 struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 int ret;
38
39 if (!codec_dai->driver->symmetric_rates &&
40 !cpu_dai->driver->symmetric_rates &&
41 !rtd->dai_link->symmetric_rates)
42 return 0;
43
44 /* This can happen if multiple streams are starting simultaneously -
45 * the second can need to get its constraints before the first has
46 * picked a rate. Complain and allow the application to carry on.
47 */
48 if (!rtd->rate) {
49 dev_warn(&rtd->dev,
50 "Not enforcing symmetric_rates due to race\n");
51 return 0;
52 }
53
54 dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
55
56 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
57 SNDRV_PCM_HW_PARAM_RATE,
58 rtd->rate, rtd->rate);
59 if (ret < 0) {
60 dev_err(&rtd->dev,
61 "Unable to apply rate symmetry constraint: %d\n", ret);
62 return ret;
63 }
64
65 return 0;
66}
67
68/*
69 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
70 * then initialized and any private data can be allocated. This also calls
71 * startup for the cpu DAI, platform, machine and codec DAI.
72 */
73static int soc_pcm_open(struct snd_pcm_substream *substream)
74{
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct snd_pcm_runtime *runtime = substream->runtime;
77 struct snd_soc_platform *platform = rtd->platform;
78 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
79 struct snd_soc_dai *codec_dai = rtd->codec_dai;
80 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
81 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
82 int ret = 0;
83
84 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
85
86 /* startup the audio subsystem */
87 if (cpu_dai->driver->ops->startup) {
88 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
89 if (ret < 0) {
90 printk(KERN_ERR "asoc: can't open interface %s\n",
91 cpu_dai->name);
92 goto out;
93 }
94 }
95
96 if (platform->driver->ops && platform->driver->ops->open) {
97 ret = platform->driver->ops->open(substream);
98 if (ret < 0) {
99 printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
100 goto platform_err;
101 }
102 }
103
104 if (codec_dai->driver->ops->startup) {
105 ret = codec_dai->driver->ops->startup(substream, codec_dai);
106 if (ret < 0) {
107 printk(KERN_ERR "asoc: can't open codec %s\n",
108 codec_dai->name);
109 goto codec_dai_err;
110 }
111 }
112
113 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
114 ret = rtd->dai_link->ops->startup(substream);
115 if (ret < 0) {
116 printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
117 goto machine_err;
118 }
119 }
120
121 /* Check that the codec and cpu DAIs are compatible */
122 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
123 runtime->hw.rate_min =
124 max(codec_dai_drv->playback.rate_min,
125 cpu_dai_drv->playback.rate_min);
126 runtime->hw.rate_max =
127 min(codec_dai_drv->playback.rate_max,
128 cpu_dai_drv->playback.rate_max);
129 runtime->hw.channels_min =
130 max(codec_dai_drv->playback.channels_min,
131 cpu_dai_drv->playback.channels_min);
132 runtime->hw.channels_max =
133 min(codec_dai_drv->playback.channels_max,
134 cpu_dai_drv->playback.channels_max);
135 runtime->hw.formats =
136 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
137 runtime->hw.rates =
138 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
139 if (codec_dai_drv->playback.rates
140 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
141 runtime->hw.rates |= cpu_dai_drv->playback.rates;
142 if (cpu_dai_drv->playback.rates
143 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
144 runtime->hw.rates |= codec_dai_drv->playback.rates;
145 } else {
146 runtime->hw.rate_min =
147 max(codec_dai_drv->capture.rate_min,
148 cpu_dai_drv->capture.rate_min);
149 runtime->hw.rate_max =
150 min(codec_dai_drv->capture.rate_max,
151 cpu_dai_drv->capture.rate_max);
152 runtime->hw.channels_min =
153 max(codec_dai_drv->capture.channels_min,
154 cpu_dai_drv->capture.channels_min);
155 runtime->hw.channels_max =
156 min(codec_dai_drv->capture.channels_max,
157 cpu_dai_drv->capture.channels_max);
158 runtime->hw.formats =
159 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
160 runtime->hw.rates =
161 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
162 if (codec_dai_drv->capture.rates
163 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
164 runtime->hw.rates |= cpu_dai_drv->capture.rates;
165 if (cpu_dai_drv->capture.rates
166 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
167 runtime->hw.rates |= codec_dai_drv->capture.rates;
168 }
169
170 ret = -EINVAL;
171 snd_pcm_limit_hw_rates(runtime);
172 if (!runtime->hw.rates) {
173 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
174 codec_dai->name, cpu_dai->name);
175 goto config_err;
176 }
177 if (!runtime->hw.formats) {
178 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
179 codec_dai->name, cpu_dai->name);
180 goto config_err;
181 }
182 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
183 runtime->hw.channels_min > runtime->hw.channels_max) {
184 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
185 codec_dai->name, cpu_dai->name);
186 goto config_err;
187 }
188
189 /* Symmetry only applies if we've already got an active stream. */
190 if (cpu_dai->active || codec_dai->active) {
191 ret = soc_pcm_apply_symmetry(substream);
192 if (ret != 0)
193 goto config_err;
194 }
195
196 pr_debug("asoc: %s <-> %s info:\n",
197 codec_dai->name, cpu_dai->name);
198 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
199 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
200 runtime->hw.channels_max);
201 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
202 runtime->hw.rate_max);
203
204 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
205 cpu_dai->playback_active++;
206 codec_dai->playback_active++;
207 } else {
208 cpu_dai->capture_active++;
209 codec_dai->capture_active++;
210 }
211 cpu_dai->active++;
212 codec_dai->active++;
213 rtd->codec->active++;
214 mutex_unlock(&rtd->pcm_mutex);
215 return 0;
216
217config_err:
218 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
219 rtd->dai_link->ops->shutdown(substream);
220
221machine_err:
222 if (codec_dai->driver->ops->shutdown)
223 codec_dai->driver->ops->shutdown(substream, codec_dai);
224
225codec_dai_err:
226 if (platform->driver->ops && platform->driver->ops->close)
227 platform->driver->ops->close(substream);
228
229platform_err:
230 if (cpu_dai->driver->ops->shutdown)
231 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
232out:
233 mutex_unlock(&rtd->pcm_mutex);
234 return ret;
235}
236
237/*
238 * Power down the audio subsystem pmdown_time msecs after close is called.
239 * This is to ensure there are no pops or clicks in between any music tracks
240 * due to DAPM power cycling.
241 */
242static void close_delayed_work(struct work_struct *work)
243{
244 struct snd_soc_pcm_runtime *rtd =
245 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
246 struct snd_soc_dai *codec_dai = rtd->codec_dai;
247
248 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
249
250 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
251 codec_dai->driver->playback.stream_name,
252 codec_dai->playback_active ? "active" : "inactive",
253 codec_dai->pop_wait ? "yes" : "no");
254
255 /* are we waiting on this codec DAI stream */
256 if (codec_dai->pop_wait == 1) {
257 codec_dai->pop_wait = 0;
258 snd_soc_dapm_stream_event(rtd,
259 codec_dai->driver->playback.stream_name,
260 SND_SOC_DAPM_STREAM_STOP);
261 }
262
263 mutex_unlock(&rtd->pcm_mutex);
264}
265
266/*
267 * Called by ALSA when a PCM substream is closed. Private data can be
268 * freed here. The cpu DAI, codec DAI, machine and platform are also
269 * shutdown.
270 */
271static int soc_pcm_close(struct snd_pcm_substream *substream)
272{
273 struct snd_soc_pcm_runtime *rtd = substream->private_data;
274 struct snd_soc_platform *platform = rtd->platform;
275 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
276 struct snd_soc_dai *codec_dai = rtd->codec_dai;
277 struct snd_soc_codec *codec = rtd->codec;
278
279 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
280
281 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
282 cpu_dai->playback_active--;
283 codec_dai->playback_active--;
284 } else {
285 cpu_dai->capture_active--;
286 codec_dai->capture_active--;
287 }
288
289 cpu_dai->active--;
290 codec_dai->active--;
291 codec->active--;
292
293 if (!cpu_dai->active && !codec_dai->active)
294 rtd->rate = 0;
295
296 /* Muting the DAC suppresses artifacts caused during digital
297 * shutdown, for example from stopping clocks.
298 */
299 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
300 snd_soc_dai_digital_mute(codec_dai, 1);
301
302 if (cpu_dai->driver->ops->shutdown)
303 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
304
305 if (codec_dai->driver->ops->shutdown)
306 codec_dai->driver->ops->shutdown(substream, codec_dai);
307
308 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
309 rtd->dai_link->ops->shutdown(substream);
310
311 if (platform->driver->ops && platform->driver->ops->close)
312 platform->driver->ops->close(substream);
313 cpu_dai->runtime = NULL;
314
315 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
316 /* start delayed pop wq here for playback streams */
317 codec_dai->pop_wait = 1;
318 schedule_delayed_work(&rtd->delayed_work,
319 msecs_to_jiffies(rtd->pmdown_time));
320 } else {
321 /* capture streams can be powered down now */
322 snd_soc_dapm_stream_event(rtd,
323 codec_dai->driver->capture.stream_name,
324 SND_SOC_DAPM_STREAM_STOP);
325 }
326
327 mutex_unlock(&rtd->pcm_mutex);
328 return 0;
329}
330
331/*
332 * Called by ALSA when the PCM substream is prepared, can set format, sample
333 * rate, etc. This function is non atomic and can be called multiple times,
334 * it can refer to the runtime info.
335 */
336static int soc_pcm_prepare(struct snd_pcm_substream *substream)
337{
338 struct snd_soc_pcm_runtime *rtd = substream->private_data;
339 struct snd_soc_platform *platform = rtd->platform;
340 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
341 struct snd_soc_dai *codec_dai = rtd->codec_dai;
342 int ret = 0;
343
344 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
345
346 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
347 ret = rtd->dai_link->ops->prepare(substream);
348 if (ret < 0) {
349 printk(KERN_ERR "asoc: machine prepare error\n");
350 goto out;
351 }
352 }
353
354 if (platform->driver->ops && platform->driver->ops->prepare) {
355 ret = platform->driver->ops->prepare(substream);
356 if (ret < 0) {
357 printk(KERN_ERR "asoc: platform prepare error\n");
358 goto out;
359 }
360 }
361
362 if (codec_dai->driver->ops->prepare) {
363 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
364 if (ret < 0) {
365 printk(KERN_ERR "asoc: codec DAI prepare error\n");
366 goto out;
367 }
368 }
369
370 if (cpu_dai->driver->ops->prepare) {
371 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
372 if (ret < 0) {
373 printk(KERN_ERR "asoc: cpu DAI prepare error\n");
374 goto out;
375 }
376 }
377
378 /* cancel any delayed stream shutdown that is pending */
379 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
380 codec_dai->pop_wait) {
381 codec_dai->pop_wait = 0;
382 cancel_delayed_work(&rtd->delayed_work);
383 }
384
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 snd_soc_dapm_stream_event(rtd,
387 codec_dai->driver->playback.stream_name,
388 SND_SOC_DAPM_STREAM_START);
389 else
390 snd_soc_dapm_stream_event(rtd,
391 codec_dai->driver->capture.stream_name,
392 SND_SOC_DAPM_STREAM_START);
393
394 snd_soc_dai_digital_mute(codec_dai, 0);
395
396out:
397 mutex_unlock(&rtd->pcm_mutex);
398 return ret;
399}
400
401/*
402 * Called by ALSA when the hardware params are set by application. This
403 * function can also be called multiple times and can allocate buffers
404 * (using snd_pcm_lib_* ). It's non-atomic.
405 */
406static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
407 struct snd_pcm_hw_params *params)
408{
409 struct snd_soc_pcm_runtime *rtd = substream->private_data;
410 struct snd_soc_platform *platform = rtd->platform;
411 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
412 struct snd_soc_dai *codec_dai = rtd->codec_dai;
413 int ret = 0;
414
415 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
416
417 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
418 ret = rtd->dai_link->ops->hw_params(substream, params);
419 if (ret < 0) {
420 printk(KERN_ERR "asoc: machine hw_params failed\n");
421 goto out;
422 }
423 }
424
425 if (codec_dai->driver->ops->hw_params) {
426 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
427 if (ret < 0) {
428 printk(KERN_ERR "asoc: can't set codec %s hw params\n",
429 codec_dai->name);
430 goto codec_err;
431 }
432 }
433
434 if (cpu_dai->driver->ops->hw_params) {
435 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
436 if (ret < 0) {
437 printk(KERN_ERR "asoc: interface %s hw params failed\n",
438 cpu_dai->name);
439 goto interface_err;
440 }
441 }
442
443 if (platform->driver->ops && platform->driver->ops->hw_params) {
444 ret = platform->driver->ops->hw_params(substream, params);
445 if (ret < 0) {
446 printk(KERN_ERR "asoc: platform %s hw params failed\n",
447 platform->name);
448 goto platform_err;
449 }
450 }
451
452 rtd->rate = params_rate(params);
453
454out:
455 mutex_unlock(&rtd->pcm_mutex);
456 return ret;
457
458platform_err:
459 if (cpu_dai->driver->ops->hw_free)
460 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
461
462interface_err:
463 if (codec_dai->driver->ops->hw_free)
464 codec_dai->driver->ops->hw_free(substream, codec_dai);
465
466codec_err:
467 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
468 rtd->dai_link->ops->hw_free(substream);
469
470 mutex_unlock(&rtd->pcm_mutex);
471 return ret;
472}
473
474/*
475 * Frees resources allocated by hw_params, can be called multiple times
476 */
477static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
478{
479 struct snd_soc_pcm_runtime *rtd = substream->private_data;
480 struct snd_soc_platform *platform = rtd->platform;
481 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
482 struct snd_soc_dai *codec_dai = rtd->codec_dai;
483 struct snd_soc_codec *codec = rtd->codec;
484
485 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
486
487 /* apply codec digital mute */
488 if (!codec->active)
489 snd_soc_dai_digital_mute(codec_dai, 1);
490
491 /* free any machine hw params */
492 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
493 rtd->dai_link->ops->hw_free(substream);
494
495 /* free any DMA resources */
496 if (platform->driver->ops && platform->driver->ops->hw_free)
497 platform->driver->ops->hw_free(substream);
498
499 /* now free hw params for the DAIs */
500 if (codec_dai->driver->ops->hw_free)
501 codec_dai->driver->ops->hw_free(substream, codec_dai);
502
503 if (cpu_dai->driver->ops->hw_free)
504 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
505
506 mutex_unlock(&rtd->pcm_mutex);
507 return 0;
508}
509
510static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
511{
512 struct snd_soc_pcm_runtime *rtd = substream->private_data;
513 struct snd_soc_platform *platform = rtd->platform;
514 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
515 struct snd_soc_dai *codec_dai = rtd->codec_dai;
516 int ret;
517
518 if (codec_dai->driver->ops->trigger) {
519 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
520 if (ret < 0)
521 return ret;
522 }
523
524 if (platform->driver->ops && platform->driver->ops->trigger) {
525 ret = platform->driver->ops->trigger(substream, cmd);
526 if (ret < 0)
527 return ret;
528 }
529
530 if (cpu_dai->driver->ops->trigger) {
531 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
532 if (ret < 0)
533 return ret;
534 }
535 return 0;
536}
537
538/*
539 * soc level wrapper for pointer callback
540 * If cpu_dai, codec_dai, platform driver has the delay callback, than
541 * the runtime->delay will be updated accordingly.
542 */
543static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
544{
545 struct snd_soc_pcm_runtime *rtd = substream->private_data;
546 struct snd_soc_platform *platform = rtd->platform;
547 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
548 struct snd_soc_dai *codec_dai = rtd->codec_dai;
549 struct snd_pcm_runtime *runtime = substream->runtime;
550 snd_pcm_uframes_t offset = 0;
551 snd_pcm_sframes_t delay = 0;
552
553 if (platform->driver->ops && platform->driver->ops->pointer)
554 offset = platform->driver->ops->pointer(substream);
555
556 if (cpu_dai->driver->ops->delay)
557 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
558
559 if (codec_dai->driver->ops->delay)
560 delay += codec_dai->driver->ops->delay(substream, codec_dai);
561
562 if (platform->driver->delay)
563 delay += platform->driver->delay(substream, codec_dai);
564
565 runtime->delay = delay;
566
567 return offset;
568}
569
570/* ASoC PCM operations */
571static struct snd_pcm_ops soc_pcm_ops = {
572 .open = soc_pcm_open,
573 .close = soc_pcm_close,
574 .hw_params = soc_pcm_hw_params,
575 .hw_free = soc_pcm_hw_free,
576 .prepare = soc_pcm_prepare,
577 .trigger = soc_pcm_trigger,
578 .pointer = soc_pcm_pointer,
579};
580
581/* create a new pcm */
582int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
583{
584 struct snd_soc_codec *codec = rtd->codec;
585 struct snd_soc_platform *platform = rtd->platform;
586 struct snd_soc_dai *codec_dai = rtd->codec_dai;
587 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
588 struct snd_pcm *pcm;
589 char new_name[64];
590 int ret = 0, playback = 0, capture = 0;
591
592 /* check client and interface hw capabilities */
593 snprintf(new_name, sizeof(new_name), "%s %s-%d",
594 rtd->dai_link->stream_name, codec_dai->name, num);
595
596 if (codec_dai->driver->playback.channels_min)
597 playback = 1;
598 if (codec_dai->driver->capture.channels_min)
599 capture = 1;
600
601 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
602 ret = snd_pcm_new(rtd->card->snd_card, new_name,
603 num, playback, capture, &pcm);
604 if (ret < 0) {
605 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
606 return ret;
607 }
608
609 /* DAPM dai link stream work */
610 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
611
612 rtd->pcm = pcm;
613 pcm->private_data = rtd;
614 if (platform->driver->ops) {
615 soc_pcm_ops.mmap = platform->driver->ops->mmap;
616 soc_pcm_ops.pointer = platform->driver->ops->pointer;
617 soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
618 soc_pcm_ops.copy = platform->driver->ops->copy;
619 soc_pcm_ops.silence = platform->driver->ops->silence;
620 soc_pcm_ops.ack = platform->driver->ops->ack;
621 soc_pcm_ops.page = platform->driver->ops->page;
622 }
623
624 if (playback)
625 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
626
627 if (capture)
628 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
629
630 if (platform->driver->pcm_new) {
631 ret = platform->driver->pcm_new(rtd);
632 if (ret < 0) {
633 pr_err("asoc: platform pcm constructor failed\n");
634 return ret;
635 }
636 }
637
638 pcm->private_free = platform->driver->pcm_free;
639 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
640 cpu_dai->name);
641 return ret;
642}