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ASoC: soc-pcm: add snd_soc_dai_get_widget()
[linux-block.git] / sound / soc / soc-pcm.c
CommitLineData
ed517582
KM		 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>
ddee627c
LG		 12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/delay.h>
988e8cc4 16#include <linux/pinctrl/consumer.h>
d6652ef8 17#include <linux/pm_runtime.h>
ddee627c
LG		 18#include <linux/slab.h>
19#include <linux/workqueue.h>
01d7584c 20#include <linux/export.h>
f86dcef8 21#include <linux/debugfs.h>
ddee627c
LG		 22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
01d7584c 26#include <sound/soc-dpcm.h>
ddee627c
LG		 27#include <sound/initval.h>
28
01d7584c
LG		 29#define DPCM_MAX_BE_USERS 8
30
f183f927
KM		 31static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
32 struct snd_pcm_substream *substream)
33{
34 if (rtd->dai_link->ops &&
35 rtd->dai_link->ops->startup)
36 return rtd->dai_link->ops->startup(substream);
37 return 0;
38}
39
0be429f9
KM		 40static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd,
41 struct snd_pcm_substream *substream)
42{
43 if (rtd->dai_link->ops &&
44 rtd->dai_link->ops->shutdown)
45 rtd->dai_link->ops->shutdown(substream);
46}
47
44c1a75b
KM		 48static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd,
49 struct snd_pcm_substream *substream)
50{
51 if (rtd->dai_link->ops &&
52 rtd->dai_link->ops->prepare)
53 return rtd->dai_link->ops->prepare(substream);
54 return 0;
55}
56
de9ad990
KM		 57static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd,
58 struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60{
61 if (rtd->dai_link->ops &&
62 rtd->dai_link->ops->hw_params)
63 return rtd->dai_link->ops->hw_params(substream, params);
64 return 0;
65}
66
49f020e5
KM		 67static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd,
68 struct snd_pcm_substream *substream)
69{
70 if (rtd->dai_link->ops &&
71 rtd->dai_link->ops->hw_free)
72 rtd->dai_link->ops->hw_free(substream);
73}
74
ad2bf9f2
KM		 75static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd,
76 struct snd_pcm_substream *substream,
77 int cmd)
78{
79 if (rtd->dai_link->ops &&
80 rtd->dai_link->ops->trigger)
81 return rtd->dai_link->ops->trigger(substream, cmd);
82 return 0;
83}
84
7a5aaba4
KM		 85static void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
86 int stream, int action)
24894b76
LPC		 87{
88 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 89 struct snd_soc_dai *codec_dai;
2e5894d7 90 int i;
24894b76 91
72b745e3 92 lockdep_assert_held(&rtd->card->pcm_mutex);
24894b76 93
0f6011fd
KM		 94 cpu_dai->stream_active[stream] += action;
95 for_each_rtd_codec_dai(rtd, i, codec_dai)
96 codec_dai->stream_active[stream] += action;
24894b76 97
7a5aaba4
KM		 98 cpu_dai->active += action;
99 cpu_dai->component->active += action;
0b7990e3 100 for_each_rtd_codec_dai(rtd, i, codec_dai) {
7a5aaba4
KM		 101 codec_dai->active += action;
102 codec_dai->component->active += action;
2e5894d7 103 }
24894b76
LPC		 104}
105
7a5aaba4
KM		 106/**
107 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
108 * @rtd: ASoC PCM runtime that is activated
109 * @stream: Direction of the PCM stream
110 *
111 * Increments the active count for all the DAIs and components attached to a PCM
112 * runtime. Should typically be called when a stream is opened.
113 *
114 * Must be called with the rtd->card->pcm_mutex being held
115 */
116void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
117{
118 snd_soc_runtime_action(rtd, stream, 1);
119}
120
24894b76
LPC		 121/**
122 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
123 * @rtd: ASoC PCM runtime that is deactivated
124 * @stream: Direction of the PCM stream
125 *
126 * Decrements the active count for all the DAIs and components attached to a PCM
127 * runtime. Should typically be called when a stream is closed.
128 *
72b745e3 129 * Must be called with the rtd->card->pcm_mutex being held
24894b76
LPC		 130 */
131void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
132{
7a5aaba4 133 snd_soc_runtime_action(rtd, stream, -1);
24894b76
LPC		 134}
135
208a1589
LPC		 136/**
137 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
138 * @rtd: The ASoC PCM runtime that should be checked.
139 *
140 * This function checks whether the power down delay should be ignored for a
141 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
142 * been configured to ignore the delay, or if none of the components benefits
143 * from having the delay.
144 */
145bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
146{
fbb16563 147 struct snd_soc_component *component;
2e5894d7 148 bool ignore = true;
613fb500 149 int i;
2e5894d7 150
208a1589
LPC		 151 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
152 return true;
153
613fb500 154 for_each_rtd_components(rtd, i, component)
72c38184 155 ignore &= !component->driver->use_pmdown_time;
fbb16563 156
fbb16563 157 return ignore;
208a1589
LPC		 158}
159
90996f43
LPC		 160/**
161 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
162 * @substream: the pcm substream
163 * @hw: the hardware parameters
164 *
165 * Sets the substream runtime hardware parameters.
166 */
167int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
168 const struct snd_pcm_hardware *hw)
169{
170 struct snd_pcm_runtime *runtime = substream->runtime;
171 runtime->hw.info = hw->info;
172 runtime->hw.formats = hw->formats;
173 runtime->hw.period_bytes_min = hw->period_bytes_min;
174 runtime->hw.period_bytes_max = hw->period_bytes_max;
175 runtime->hw.periods_min = hw->periods_min;
176 runtime->hw.periods_max = hw->periods_max;
177 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
178 runtime->hw.fifo_size = hw->fifo_size;
179 return 0;
180}
181EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
182
01d7584c 183/* DPCM stream event, send event to FE and all active BEs. */
23607025 184int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
01d7584c
LG		 185 int event)
186{
187 struct snd_soc_dpcm *dpcm;
188
8d6258a4 189 for_each_dpcm_be(fe, dir, dpcm) {
01d7584c
LG		 190
191 struct snd_soc_pcm_runtime *be = dpcm->be;
192
103d84a3 193 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
01d7584c
LG		 194 be->dai_link->name, event, dir);
195
b1cd2e34
BG		 196 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
197 (be->dpcm[dir].users >= 1))
198 continue;
199
01d7584c
LG		 200 snd_soc_dapm_stream_event(be, dir, event);
201 }
202
203 snd_soc_dapm_stream_event(fe, dir, event);
204
205 return 0;
206}
207
17841020
DA		 208static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
209 struct snd_soc_dai *soc_dai)
ddee627c
LG		 210{
211 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c
LG		 212 int ret;
213
3635bf09
NC		 214 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
215 rtd->dai_link->symmetric_rates)) {
216 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
217 soc_dai->rate);
218
4dcdd43b 219 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 220 SNDRV_PCM_HW_PARAM_RATE,
4dcdd43b 221 soc_dai->rate);
3635bf09
NC		 222 if (ret < 0) {
223 dev_err(soc_dai->dev,
224 "ASoC: Unable to apply rate constraint: %d\n",
225 ret);
226 return ret;
227 }
228 }
ddee627c 229
3635bf09
NC		 230 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
231 rtd->dai_link->symmetric_channels)) {
232 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
233 soc_dai->channels);
ddee627c 234
4dcdd43b 235 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 236 SNDRV_PCM_HW_PARAM_CHANNELS,
3635bf09
NC		 237 soc_dai->channels);
238 if (ret < 0) {
239 dev_err(soc_dai->dev,
240 "ASoC: Unable to apply channel symmetry constraint: %d\n",
241 ret);
242 return ret;
243 }
ddee627c
LG		 244 }
245
3635bf09
NC		 246 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
247 rtd->dai_link->symmetric_samplebits)) {
248 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
249 soc_dai->sample_bits);
ddee627c 250
4dcdd43b 251 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 252 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
3635bf09
NC		 253 soc_dai->sample_bits);
254 if (ret < 0) {
255 dev_err(soc_dai->dev,
256 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
257 ret);
258 return ret;
259 }
ddee627c
LG		 260 }
261
262 return 0;
263}
264
3635bf09
NC		 265static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
266 struct snd_pcm_hw_params *params)
267{
268 struct snd_soc_pcm_runtime *rtd = substream->private_data;
269 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 270 struct snd_soc_dai *codec_dai;
2e5894d7 271 unsigned int rate, channels, sample_bits, symmetry, i;
3635bf09
NC		 272
273 rate = params_rate(params);
274 channels = params_channels(params);
275 sample_bits = snd_pcm_format_physical_width(params_format(params));
276
277 /* reject unmatched parameters when applying symmetry */
278 symmetry = cpu_dai->driver->symmetric_rates ||
3635bf09 279 rtd->dai_link->symmetric_rates;
2e5894d7 280
0b7990e3
KM		 281 for_each_rtd_codec_dai(rtd, i, codec_dai)
282 symmetry |= codec_dai->driver->symmetric_rates;
2e5894d7 283
3635bf09
NC		 284 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
285 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
286 cpu_dai->rate, rate);
287 return -EINVAL;
ddee627c
LG		 288 }
289
3635bf09 290 symmetry = cpu_dai->driver->symmetric_channels ||
3635bf09 291 rtd->dai_link->symmetric_channels;
2e5894d7 292
0b7990e3
KM		 293 for_each_rtd_codec_dai(rtd, i, codec_dai)
294 symmetry |= codec_dai->driver->symmetric_channels;
2e5894d7 295
3635bf09
NC		 296 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
297 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
298 cpu_dai->channels, channels);
299 return -EINVAL;
300 }
ddee627c 301
3635bf09 302 symmetry = cpu_dai->driver->symmetric_samplebits ||
3635bf09 303 rtd->dai_link->symmetric_samplebits;
2e5894d7 304
0b7990e3
KM		 305 for_each_rtd_codec_dai(rtd, i, codec_dai)
306 symmetry |= codec_dai->driver->symmetric_samplebits;
2e5894d7 307
3635bf09
NC		 308 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
309 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
310 cpu_dai->sample_bits, sample_bits);
311 return -EINVAL;
ddee627c
LG		 312 }
313
314 return 0;
315}
316
62e5f676
LPC		 317static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
318{
319 struct snd_soc_pcm_runtime *rtd = substream->private_data;
320 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
62e5f676 321 struct snd_soc_dai_link *link = rtd->dai_link;
0b7990e3 322 struct snd_soc_dai *codec_dai;
2e5894d7 323 unsigned int symmetry, i;
62e5f676 324
2e5894d7
BC		 325 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
326 cpu_driver->symmetric_channels || link->symmetric_channels ||
327 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
62e5f676 328
0b7990e3 329 for_each_rtd_codec_dai(rtd, i, codec_dai)
2e5894d7 330 symmetry = symmetry ||
0b7990e3
KM		 331 codec_dai->driver->symmetric_rates ||
332 codec_dai->driver->symmetric_channels ||
333 codec_dai->driver->symmetric_samplebits;
2e5894d7
BC		 334
335 return symmetry;
62e5f676
LPC		 336}
337
2e5894d7 338static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
58ba9b25 339{
2e5894d7 340 struct snd_soc_pcm_runtime *rtd = substream->private_data;
c6068d3a 341 int ret;
58ba9b25
MB		 342
343 if (!bits)
344 return;
345
0e2a3751
LPC		 346 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
347 if (ret != 0)
348 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
349 bits, ret);
58ba9b25
MB		 350}
351
c8dd1fec
BC		 352static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
353{
354 struct snd_soc_pcm_runtime *rtd = substream->private_data;
355 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 356 struct snd_soc_dai *codec_dai;
57be9206
KM		 357 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu;
358 int stream = substream->stream;
2e5894d7 359 int i;
c8dd1fec
BC		 360 unsigned int bits = 0, cpu_bits;
361
57be9206
KM		 362 for_each_rtd_codec_dai(rtd, i, codec_dai) {
363 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
364
365 if (pcm_codec->sig_bits == 0) {
366 bits = 0;
367 break;
2e5894d7 368 }
57be9206 369 bits = max(pcm_codec->sig_bits, bits);
c8dd1fec
BC		 370 }
371
57be9206
KM		 372 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
373 cpu_bits = pcm_cpu->sig_bits;
374
2e5894d7
BC		 375 soc_pcm_set_msb(substream, bits);
376 soc_pcm_set_msb(substream, cpu_bits);
c8dd1fec
BC		 377}
378
2e5894d7 379static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
bd477c31 380{
2e5894d7 381 struct snd_pcm_runtime *runtime = substream->runtime;
78e45c99 382 struct snd_pcm_hardware *hw = &runtime->hw;
2e5894d7 383 struct snd_soc_pcm_runtime *rtd = substream->private_data;
0b7990e3 384 struct snd_soc_dai *codec_dai;
2e5894d7
BC		 385 struct snd_soc_pcm_stream *codec_stream;
386 struct snd_soc_pcm_stream *cpu_stream;
387 unsigned int chan_min = 0, chan_max = UINT_MAX;
388 unsigned int rate_min = 0, rate_max = UINT_MAX;
389 unsigned int rates = UINT_MAX;
390 u64 formats = ULLONG_MAX;
acf253c1 391 int stream = substream->stream;
2e5894d7 392 int i;
78e45c99 393
acf253c1 394 cpu_stream = snd_soc_dai_get_pcm_stream(rtd->cpu_dai, stream);
78e45c99 395
2e5894d7 396 /* first calculate min/max only for CODECs in the DAI link */
0b7990e3 397 for_each_rtd_codec_dai(rtd, i, codec_dai) {
cde79035
RW		 398
399 /*
400 * Skip CODECs which don't support the current stream type.
401 * Otherwise, since the rate, channel, and format values will
402 * zero in that case, we would have no usable settings left,
403 * causing the resulting setup to fail.
404 * At least one CODEC should match, otherwise we should have
405 * bailed out on a higher level, since there would be no
406 * CODEC to support the transfer direction in that case.
407 */
0b7990e3 408 if (!snd_soc_dai_stream_valid(codec_dai,
cde79035
RW		 409 substream->stream))
410 continue;
411
acf253c1
KM		 412 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
413
2e5894d7
BC		 414 chan_min = max(chan_min, codec_stream->channels_min);
415 chan_max = min(chan_max, codec_stream->channels_max);
416 rate_min = max(rate_min, codec_stream->rate_min);
417 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
418 formats &= codec_stream->formats;
419 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
420 }
421
422 /*
423 * chan min/max cannot be enforced if there are multiple CODEC DAIs
424 * connected to a single CPU DAI, use CPU DAI's directly and let
425 * channel allocation be fixed up later
426 */
427 if (rtd->num_codecs > 1) {
428 chan_min = cpu_stream->channels_min;
429 chan_max = cpu_stream->channels_max;
430 }
431
432 hw->channels_min = max(chan_min, cpu_stream->channels_min);
433 hw->channels_max = min(chan_max, cpu_stream->channels_max);
434 if (hw->formats)
435 hw->formats &= formats & cpu_stream->formats;
436 else
437 hw->formats = formats & cpu_stream->formats;
438 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
78e45c99
LPC		 439
440 snd_pcm_limit_hw_rates(runtime);
441
442 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
2e5894d7 443 hw->rate_min = max(hw->rate_min, rate_min);
78e45c99 444 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
2e5894d7 445 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
bd477c31
LPC		 446}
447
dd03907b 448static int soc_pcm_components_open(struct snd_pcm_substream *substream)
e7ecfdb7
KM		 449{
450 struct snd_soc_pcm_runtime *rtd = substream->private_data;
e7ecfdb7 451 struct snd_soc_component *component;
613fb500 452 int i, ret = 0;
e7ecfdb7 453
613fb500 454 for_each_rtd_components(rtd, i, component) {
4a81e8f3
KM		 455 ret = snd_soc_component_module_get_when_open(component);
456 if (ret < 0) {
e7ecfdb7
KM		 457 dev_err(component->dev,
458 "ASoC: can't get module %s\n",
459 component->name);
4a81e8f3 460 return ret;
e7ecfdb7
KM		 461 }
462
ae2f4849 463 ret = snd_soc_component_open(component, substream);
e7ecfdb7
KM		 464 if (ret < 0) {
465 dev_err(component->dev,
466 "ASoC: can't open component %s: %d\n",
467 component->name, ret);
468 return ret;
469 }
470 }
dd03907b 471
e7ecfdb7
KM		 472 return 0;
473}
474
dd03907b 475static int soc_pcm_components_close(struct snd_pcm_substream *substream)
244e2936
CK		 476{
477 struct snd_soc_pcm_runtime *rtd = substream->private_data;
244e2936 478 struct snd_soc_component *component;
e82ebffc 479 int i, r, ret = 0;
244e2936 480
613fb500 481 for_each_rtd_components(rtd, i, component) {
e82ebffc
KM		 482 r = snd_soc_component_close(component, substream);
483 if (r < 0)
484 ret = r; /* use last ret */
485
4a81e8f3 486 snd_soc_component_module_put_when_close(component);
244e2936
CK		 487 }
488
3672beb8 489 return ret;
244e2936
CK		 490}
491
62c86d1d
KM		 492/*
493 * Called by ALSA when a PCM substream is closed. Private data can be
494 * freed here. The cpu DAI, codec DAI, machine and components are also
495 * shutdown.
496 */
497static int soc_pcm_close(struct snd_pcm_substream *substream)
498{
499 struct snd_soc_pcm_runtime *rtd = substream->private_data;
500 struct snd_soc_component *component;
501 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
502 struct snd_soc_dai *codec_dai;
503 int i;
504
505 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
506
507 snd_soc_runtime_deactivate(rtd, substream->stream);
508
509 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
510
511 snd_soc_dai_shutdown(cpu_dai, substream);
512
513 for_each_rtd_codec_dai(rtd, i, codec_dai)
514 snd_soc_dai_shutdown(codec_dai, substream);
515
516 soc_rtd_shutdown(rtd, substream);
517
518 soc_pcm_components_close(substream);
519
520 snd_soc_dapm_stream_stop(rtd, substream->stream);
521
522 mutex_unlock(&rtd->card->pcm_mutex);
523
524 for_each_rtd_components(rtd, i, component) {
525 pm_runtime_mark_last_busy(component->dev);
526 pm_runtime_put_autosuspend(component->dev);
527 }
528
529 for_each_rtd_components(rtd, i, component)
530 if (!component->active)
531 pinctrl_pm_select_sleep_state(component->dev);
532
533 return 0;
534}
535
ddee627c
LG		 536/*
537 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
538 * then initialized and any private data can be allocated. This also calls
ef050bec 539 * startup for the cpu DAI, component, machine and codec DAI.
ddee627c
LG		 540 */
541static int soc_pcm_open(struct snd_pcm_substream *substream)
542{
543 struct snd_soc_pcm_runtime *rtd = substream->private_data;
544 struct snd_pcm_runtime *runtime = substream->runtime;
90be711e 545 struct snd_soc_component *component;
ddee627c 546 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 547 struct snd_soc_dai *codec_dai;
548 const char *codec_dai_name = "multicodec";
244e2936 549 int i, ret = 0;
ddee627c 550
76c39e86
KM		 551 for_each_rtd_components(rtd, i, component)
552 pinctrl_pm_select_default_state(component->dev);
90be711e 553
613fb500 554 for_each_rtd_components(rtd, i, component)
90be711e 555 pm_runtime_get_sync(component->dev);
d6652ef8 556
72b745e3 557 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 558
5d9fa03e
KM		 559 ret = soc_pcm_components_open(substream);
560 if (ret < 0)
561 goto component_err;
562
563 ret = soc_rtd_startup(rtd, substream);
564 if (ret < 0) {
565 pr_err("ASoC: %s startup failed: %d\n",
566 rtd->dai_link->name, ret);
567 goto component_err;
568 }
569
ddee627c 570 /* startup the audio subsystem */
5a52a045
KM		 571 ret = snd_soc_dai_startup(cpu_dai, substream);
572 if (ret < 0) {
573 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
574 cpu_dai->name, ret);
5d9fa03e 575 goto cpu_dai_err;
ddee627c
LG		 576 }
577
0b7990e3 578 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5a52a045
KM		 579 ret = snd_soc_dai_startup(codec_dai, substream);
580 if (ret < 0) {
581 dev_err(codec_dai->dev,
582 "ASoC: can't open codec %s: %d\n",
583 codec_dai->name, ret);
5d9fa03e 584 goto config_err;
ddee627c 585 }
2e5894d7
BC		 586
587 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
588 codec_dai->tx_mask = 0;
589 else
590 codec_dai->rx_mask = 0;
ddee627c
LG		 591 }
592
01d7584c
LG		 593 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
594 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
595 goto dynamic;
596
ddee627c 597 /* Check that the codec and cpu DAIs are compatible */
2e5894d7
BC		 598 soc_pcm_init_runtime_hw(substream);
599
600 if (rtd->num_codecs == 1)
601 codec_dai_name = rtd->codec_dai->name;
ddee627c 602
62e5f676
LPC		 603 if (soc_pcm_has_symmetry(substream))
604 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
605
ddee627c 606 ret = -EINVAL;
ddee627c 607 if (!runtime->hw.rates) {
103d84a3 608 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
2e5894d7 609 codec_dai_name, cpu_dai->name);
ddee627c
LG		 610 goto config_err;
611 }
612 if (!runtime->hw.formats) {
103d84a3 613 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
2e5894d7 614 codec_dai_name, cpu_dai->name);
ddee627c
LG		 615 goto config_err;
616 }
617 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
618 runtime->hw.channels_min > runtime->hw.channels_max) {
103d84a3 619 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
2e5894d7 620 codec_dai_name, cpu_dai->name);
ddee627c
LG		 621 goto config_err;
622 }
623
c8dd1fec 624 soc_pcm_apply_msb(substream);
58ba9b25 625
ddee627c 626 /* Symmetry only applies if we've already got an active stream. */
17841020
DA		 627 if (cpu_dai->active) {
628 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
629 if (ret != 0)
630 goto config_err;
631 }
632
0b7990e3
KM		 633 for_each_rtd_codec_dai(rtd, i, codec_dai) {
634 if (codec_dai->active) {
635 ret = soc_pcm_apply_symmetry(substream, codec_dai);
2e5894d7
BC		 636 if (ret != 0)
637 goto config_err;
638 }
ddee627c
LG		 639 }
640
103d84a3 641 pr_debug("ASoC: %s <-> %s info:\n",
2e5894d7 642 codec_dai_name, cpu_dai->name);
103d84a3
LG		 643 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
644 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
ddee627c 645 runtime->hw.channels_max);
103d84a3 646 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
ddee627c
LG		 647 runtime->hw.rate_max);
648
01d7584c 649dynamic:
24894b76
LPC		 650
651 snd_soc_runtime_activate(rtd, substream->stream);
652
72b745e3 653 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 654 return 0;
655
656config_err:
b56be800 657 for_each_rtd_codec_dai(rtd, i, codec_dai)
330fcb51 658 snd_soc_dai_shutdown(codec_dai, substream);
5d9fa03e
KM		 659cpu_dai_err:
660 snd_soc_dai_shutdown(cpu_dai, substream);
2e5894d7 661
5d9fa03e 662 soc_rtd_shutdown(rtd, substream);
b8135864 663component_err:
dd03907b 664 soc_pcm_components_close(substream);
e7ecfdb7 665
72b745e3 666 mutex_unlock(&rtd->card->pcm_mutex);
d6652ef8 667
613fb500 668 for_each_rtd_components(rtd, i, component) {
90be711e
KM		 669 pm_runtime_mark_last_busy(component->dev);
670 pm_runtime_put_autosuspend(component->dev);
3f809783
SK		 671 }
672
76c39e86
KM		 673 for_each_rtd_components(rtd, i, component)
674 if (!component->active)
675 pinctrl_pm_select_sleep_state(component->dev);
d6652ef8 676
ddee627c
LG		 677 return ret;
678}
679
4bf2e385 680static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
a342031c
JB		 681{
682 /*
683 * Currently nothing to do for c2c links
684 * Since c2c links are internal nodes in the DAPM graph and
685 * don't interface with the outside world or application layer
686 * we don't have to do any special handling on close.
687 */
688}
689
ddee627c
LG		 690/*
691 * Called by ALSA when the PCM substream is prepared, can set format, sample
692 * rate, etc. This function is non atomic and can be called multiple times,
693 * it can refer to the runtime info.
694 */
695static int soc_pcm_prepare(struct snd_pcm_substream *substream)
696{
697 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864 698 struct snd_soc_component *component;
ddee627c 699 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 700 struct snd_soc_dai *codec_dai;
701 int i, ret = 0;
ddee627c 702
72b745e3 703 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 704
44c1a75b
KM		 705 ret = soc_rtd_prepare(rtd, substream);
706 if (ret < 0) {
707 dev_err(rtd->card->dev,
708 "ASoC: machine prepare error: %d\n", ret);
709 goto out;
ddee627c
LG		 710 }
711
613fb500 712 for_each_rtd_components(rtd, i, component) {
6d537233 713 ret = snd_soc_component_prepare(component, substream);
b8135864
KM		 714 if (ret < 0) {
715 dev_err(component->dev,
716 "ASoC: platform prepare error: %d\n", ret);
717 goto out;
718 }
719 }
720
0b7990e3 721 for_each_rtd_codec_dai(rtd, i, codec_dai) {
4beb8e10 722 ret = snd_soc_dai_prepare(codec_dai, substream);
ddee627c 723 if (ret < 0) {
4beb8e10
KM		 724 dev_err(codec_dai->dev,
725 "ASoC: codec DAI prepare error: %d\n",
726 ret);
ddee627c
LG		 727 goto out;
728 }
729 }
730
4beb8e10
KM		 731 ret = snd_soc_dai_prepare(cpu_dai, substream);
732 if (ret < 0) {
733 dev_err(cpu_dai->dev,
734 "ASoC: cpu DAI prepare error: %d\n", ret);
735 goto out;
736 }
737
ddee627c
LG		 738 /* cancel any delayed stream shutdown that is pending */
739 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
9bffb1fb
MLC		 740 rtd->pop_wait) {
741 rtd->pop_wait = 0;
ddee627c
LG		 742 cancel_delayed_work(&rtd->delayed_work);
743 }
744
d9b0951b
LG		 745 snd_soc_dapm_stream_event(rtd, substream->stream,
746 SND_SOC_DAPM_STREAM_START);
ddee627c 747
0b7990e3
KM		 748 for_each_rtd_codec_dai(rtd, i, codec_dai)
749 snd_soc_dai_digital_mute(codec_dai, 0,
2e5894d7 750 substream->stream);
ae11601b 751 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
ddee627c
LG		 752
753out:
72b745e3 754 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 755 return ret;
756}
757
2e5894d7
BC		 758static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
759 unsigned int mask)
760{
761 struct snd_interval *interval;
762 int channels = hweight_long(mask);
763
764 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
765 interval->min = channels;
766 interval->max = channels;
767}
768
244e2936
CK		 769static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
770 struct snd_soc_component *last)
771{
772 struct snd_soc_pcm_runtime *rtd = substream->private_data;
244e2936 773 struct snd_soc_component *component;
e82ebffc 774 int i, r, ret = 0;
244e2936 775
613fb500 776 for_each_rtd_components(rtd, i, component) {
244e2936
CK		 777 if (component == last)
778 break;
779
e82ebffc
KM		 780 r = snd_soc_component_hw_free(component, substream);
781 if (r < 0)
782 ret = r; /* use last ret */
244e2936
CK		 783 }
784
eae7136a 785 return ret;
244e2936
CK		 786}
787
ddee627c
LG		 788/*
789 * Called by ALSA when the hardware params are set by application. This
790 * function can also be called multiple times and can allocate buffers
791 * (using snd_pcm_lib_* ). It's non-atomic.
792 */
793static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
794 struct snd_pcm_hw_params *params)
795{
796 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864 797 struct snd_soc_component *component;
ddee627c 798 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 799 struct snd_soc_dai *codec_dai;
244e2936 800 int i, ret = 0;
ddee627c 801
72b745e3 802 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
5cca5951
SW		 803
804 ret = soc_pcm_params_symmetry(substream, params);
805 if (ret)
806 goto out;
807
de9ad990
KM		 808 ret = soc_rtd_hw_params(rtd, substream, params);
809 if (ret < 0) {
810 dev_err(rtd->card->dev,
811 "ASoC: machine hw_params failed: %d\n", ret);
812 goto out;
ddee627c
LG		 813 }
814
0b7990e3 815 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 816 struct snd_pcm_hw_params codec_params;
817
cde79035
RW		 818 /*
819 * Skip CODECs which don't support the current stream type,
820 * the idea being that if a CODEC is not used for the currently
821 * set up transfer direction, it should not need to be
822 * configured, especially since the configuration used might
823 * not even be supported by that CODEC. There may be cases
824 * however where a CODEC needs to be set up although it is
825 * actually not being used for the transfer, e.g. if a
826 * capture-only CODEC is acting as an LRCLK and/or BCLK master
827 * for the DAI link including a playback-only CODEC.
828 * If this becomes necessary, we will have to augment the
829 * machine driver setup with information on how to act, so
830 * we can do the right thing here.
831 */
832 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
833 continue;
834
2e5894d7
BC		 835 /* copy params for each codec */
836 codec_params = *params;
837
838 /* fixup params based on TDM slot masks */
570f18b6
RW		 839 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
840 codec_dai->tx_mask)
2e5894d7
BC		 841 soc_pcm_codec_params_fixup(&codec_params,
842 codec_dai->tx_mask);
570f18b6
RW		 843
844 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
845 codec_dai->rx_mask)
2e5894d7
BC		 846 soc_pcm_codec_params_fixup(&codec_params,
847 codec_dai->rx_mask);
848
aa6166c2
KM		 849 ret = snd_soc_dai_hw_params(codec_dai, substream,
850 &codec_params);
93e6958a 851 if(ret < 0)
ddee627c 852 goto codec_err;
ddee627c 853
2e5894d7
BC		 854 codec_dai->rate = params_rate(&codec_params);
855 codec_dai->channels = params_channels(&codec_params);
856 codec_dai->sample_bits = snd_pcm_format_physical_width(
857 params_format(&codec_params));
078a85f2
CK		 858
859 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
ddee627c
LG		 860 }
861
aa6166c2 862 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
93e6958a
BC		 863 if (ret < 0)
864 goto interface_err;
ddee627c 865
ca58221d
KM		 866 /* store the parameters for each DAIs */
867 cpu_dai->rate = params_rate(params);
868 cpu_dai->channels = params_channels(params);
869 cpu_dai->sample_bits =
870 snd_pcm_format_physical_width(params_format(params));
871
872 snd_soc_dapm_update_dai(substream, params, cpu_dai);
873
613fb500 874 for_each_rtd_components(rtd, i, component) {
245c539a 875 ret = snd_soc_component_hw_params(component, substream, params);
244e2936 876 if (ret < 0) {
b8135864
KM		 877 dev_err(component->dev,
878 "ASoC: %s hw params failed: %d\n",
244e2936
CK		 879 component->name, ret);
880 goto component_err;
b8135864
KM		 881 }
882 }
244e2936 883 component = NULL;
b8135864 884
ddee627c 885out:
72b745e3 886 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 887 return ret;
888
b8135864 889component_err:
244e2936 890 soc_pcm_components_hw_free(substream, component);
b8135864 891
846faaed 892 snd_soc_dai_hw_free(cpu_dai, substream);
2371abdc 893 cpu_dai->rate = 0;
ddee627c
LG		 894
895interface_err:
2e5894d7 896 i = rtd->num_codecs;
ddee627c
LG		 897
898codec_err:
6d11b128 899 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
f47b9ad9
JB		 900 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
901 continue;
902
846faaed 903 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7
BC		 904 codec_dai->rate = 0;
905 }
906
49f020e5 907 soc_rtd_hw_free(rtd, substream);
ddee627c 908
72b745e3 909 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 910 return ret;
911}
912
913/*
914 * Frees resources allocated by hw_params, can be called multiple times
915 */
916static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
917{
918 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 919 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 920 struct snd_soc_dai *codec_dai;
7f62b6ee 921 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
2e5894d7 922 int i;
ddee627c 923
72b745e3 924 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 925
d3383420
NC		 926 /* clear the corresponding DAIs parameters when going to be inactive */
927 if (cpu_dai->active == 1) {
928 cpu_dai->rate = 0;
929 cpu_dai->channels = 0;
930 cpu_dai->sample_bits = 0;
931 }
932
0b7990e3 933 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 934 if (codec_dai->active == 1) {
935 codec_dai->rate = 0;
936 codec_dai->channels = 0;
937 codec_dai->sample_bits = 0;
938 }
d3383420
NC		 939 }
940
ddee627c 941 /* apply codec digital mute */
0b7990e3 942 for_each_rtd_codec_dai(rtd, i, codec_dai) {
0f6011fd
KM		 943 int playback_active = codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK];
944 int capture_active = codec_dai->stream_active[SNDRV_PCM_STREAM_CAPTURE];
945
946 if ((playback && playback_active == 1) ||
947 (!playback && capture_active == 1))
0b7990e3 948 snd_soc_dai_digital_mute(codec_dai, 1,
2e5894d7
BC		 949 substream->stream);
950 }
ddee627c
LG		 951
952 /* free any machine hw params */
49f020e5 953 soc_rtd_hw_free(rtd, substream);
ddee627c 954
b8135864 955 /* free any component resources */
244e2936 956 soc_pcm_components_hw_free(substream, NULL);
b8135864 957
ddee627c 958 /* now free hw params for the DAIs */
0b7990e3 959 for_each_rtd_codec_dai(rtd, i, codec_dai) {
f47b9ad9
JB		 960 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
961 continue;
962
846faaed 963 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7 964 }
ddee627c 965
846faaed 966 snd_soc_dai_hw_free(cpu_dai, substream);
ddee627c 967
72b745e3 968 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 969 return 0;
970}
971
4378f1fb 972static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
ddee627c
LG		 973{
974 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864 975 struct snd_soc_component *component;
ddee627c 976 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 977 struct snd_soc_dai *codec_dai;
978 int i, ret;
979
ad2bf9f2
KM		 980 ret = soc_rtd_trigger(rtd, substream, cmd);
981 if (ret < 0)
982 return ret;
ddee627c 983
613fb500 984 for_each_rtd_components(rtd, i, component) {
5693d50c 985 ret = snd_soc_component_trigger(component, substream, cmd);
b8135864
KM		 986 if (ret < 0)
987 return ret;
988 }
989
901e822b 990 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
95aef355
KM		 991 if (ret < 0)
992 return ret;
4792b0db 993
4378f1fb
PU		 994 for_each_rtd_codec_dai(rtd, i, codec_dai) {
995 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
996 if (ret < 0)
997 return ret;
998 }
999
1000 return 0;
1001}
1002
1003static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1004{
1005 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1006 struct snd_soc_component *component;
4378f1fb
PU		 1007 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1008 struct snd_soc_dai *codec_dai;
1009 int i, ret;
1010
1011 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1012 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1013 if (ret < 0)
1014 return ret;
1015 }
1016
1017 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1018 if (ret < 0)
1019 return ret;
1020
613fb500 1021 for_each_rtd_components(rtd, i, component) {
4378f1fb
PU		 1022 ret = snd_soc_component_trigger(component, substream, cmd);
1023 if (ret < 0)
1024 return ret;
1025 }
1026
ad2bf9f2
KM		 1027 ret = soc_rtd_trigger(rtd, substream, cmd);
1028 if (ret < 0)
1029 return ret;
4792b0db 1030
ddee627c
LG		 1031 return 0;
1032}
1033
4378f1fb
PU		 1034static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1035{
1036 int ret;
1037
1038 switch (cmd) {
1039 case SNDRV_PCM_TRIGGER_START:
1040 case SNDRV_PCM_TRIGGER_RESUME:
1041 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1042 ret = soc_pcm_trigger_start(substream, cmd);
1043 break;
1044 case SNDRV_PCM_TRIGGER_STOP:
1045 case SNDRV_PCM_TRIGGER_SUSPEND:
1046 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1047 ret = soc_pcm_trigger_stop(substream, cmd);
1048 break;
1049 default:
1050 return -EINVAL;
1051 }
1052
1053 return ret;
1054}
1055
45c0a188
MB		 1056static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1057 int cmd)
07bf84aa
LG		 1058{
1059 struct snd_soc_pcm_runtime *rtd = substream->private_data;
07bf84aa 1060 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 1061 struct snd_soc_dai *codec_dai;
1062 int i, ret;
1063
0b7990e3 1064 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5c0769af 1065 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
07bf84aa
LG		 1066 if (ret < 0)
1067 return ret;
1068 }
5c0769af 1069
901e822b 1070 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
5c0769af
KM		 1071 if (ret < 0)
1072 return ret;
1073
07bf84aa
LG		 1074 return 0;
1075}
ddee627c
LG		 1076/*
1077 * soc level wrapper for pointer callback
ef050bec 1078 * If cpu_dai, codec_dai, component driver has the delay callback, then
ddee627c
LG		 1079 * the runtime->delay will be updated accordingly.
1080 */
1081static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1082{
1083 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 1084 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 1085 struct snd_soc_dai *codec_dai;
ddee627c
LG		 1086 struct snd_pcm_runtime *runtime = substream->runtime;
1087 snd_pcm_uframes_t offset = 0;
1088 snd_pcm_sframes_t delay = 0;
2e5894d7
BC		 1089 snd_pcm_sframes_t codec_delay = 0;
1090 int i;
ddee627c 1091
9fb4c2bf
AA		 1092 /* clearing the previous total delay */
1093 runtime->delay = 0;
1094
0035e256 1095 offset = snd_soc_pcm_component_pointer(substream);
b8135864 1096
9fb4c2bf
AA		 1097 /* base delay if assigned in pointer callback */
1098 delay = runtime->delay;
b8135864 1099
1dea80d4 1100 delay += snd_soc_dai_delay(cpu_dai, substream);
ddee627c 1101
0b7990e3 1102 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1dea80d4
KM		 1103 codec_delay = max(codec_delay,
1104 snd_soc_dai_delay(codec_dai, substream));
2e5894d7
BC		 1105 }
1106 delay += codec_delay;
ddee627c 1107
ddee627c
LG		 1108 runtime->delay = delay;
1109
1110 return offset;
1111}
1112
01d7584c
LG		 1113/* connect a FE and BE */
1114static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1115 struct snd_soc_pcm_runtime *be, int stream)
1116{
1117 struct snd_soc_dpcm *dpcm;
a9764869 1118 unsigned long flags;
bd0b609e 1119#ifdef CONFIG_DEBUG_FS
0632fa04 1120 char *name;
bd0b609e 1121#endif
01d7584c
LG		 1122
1123 /* only add new dpcms */
8d6258a4 1124 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1125 if (dpcm->be == be && dpcm->fe == fe)
1126 return 0;
1127 }
1128
1129 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1130 if (!dpcm)
1131 return -ENOMEM;
1132
1133 dpcm->be = be;
1134 dpcm->fe = fe;
1135 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1136 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
a9764869 1137 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1138 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1139 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
a9764869 1140 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c 1141
7cc302d2 1142 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
01d7584c
LG		 1143 stream ? "capture" : "playback", fe->dai_link->name,
1144 stream ? "<-" : "->", be->dai_link->name);
1145
f86dcef8 1146#ifdef CONFIG_DEBUG_FS
0632fa04
HG		 1147 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1148 stream ? "capture" : "playback");
1149 if (name) {
1150 dpcm->debugfs_state = debugfs_create_dir(name,
1151 fe->debugfs_dpcm_root);
1152 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1153 &dpcm->state);
1154 kfree(name);
1155 }
f86dcef8 1156#endif
01d7584c
LG		 1157 return 1;
1158}
1159
1160/* reparent a BE onto another FE */
1161static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1162 struct snd_soc_pcm_runtime *be, int stream)
1163{
1164 struct snd_soc_dpcm *dpcm;
1165 struct snd_pcm_substream *fe_substream, *be_substream;
1166
1167 /* reparent if BE is connected to other FEs */
1168 if (!be->dpcm[stream].users)
1169 return;
1170
1171 be_substream = snd_soc_dpcm_get_substream(be, stream);
1172
d2e24d64 1173 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 1174 if (dpcm->fe == fe)
1175 continue;
1176
7cc302d2 1177 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
01d7584c
LG		 1178 stream ? "capture" : "playback",
1179 dpcm->fe->dai_link->name,
1180 stream ? "<-" : "->", dpcm->be->dai_link->name);
1181
1182 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1183 be_substream->runtime = fe_substream->runtime;
1184 break;
1185 }
1186}
1187
1188/* disconnect a BE and FE */
23607025 1189void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1190{
1191 struct snd_soc_dpcm *dpcm, *d;
a9764869 1192 unsigned long flags;
01d7584c 1193
8d6258a4 1194 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
103d84a3 1195 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
01d7584c
LG		 1196 stream ? "capture" : "playback",
1197 dpcm->be->dai_link->name);
1198
1199 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1200 continue;
1201
7cc302d2 1202 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
01d7584c
LG		 1203 stream ? "capture" : "playback", fe->dai_link->name,
1204 stream ? "<-" : "->", dpcm->be->dai_link->name);
1205
1206 /* BEs still alive need new FE */
1207 dpcm_be_reparent(fe, dpcm->be, stream);
1208
f86dcef8 1209#ifdef CONFIG_DEBUG_FS
fee531d6 1210 debugfs_remove_recursive(dpcm->debugfs_state);
f86dcef8 1211#endif
a9764869 1212 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1213 list_del(&dpcm->list_be);
1214 list_del(&dpcm->list_fe);
a9764869 1215 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1216 kfree(dpcm);
1217 }
1218}
1219
1220/* get BE for DAI widget and stream */
1221static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1222 struct snd_soc_dapm_widget *widget, int stream)
1223{
1224 struct snd_soc_pcm_runtime *be;
93597fae 1225 struct snd_soc_dapm_widget *w;
7afecb30 1226 struct snd_soc_dai *dai;
1a497983 1227 int i;
01d7584c 1228
3c146465
LG		 1229 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1230
93597fae 1231 for_each_card_rtds(card, be) {
01d7584c 1232
93597fae
KM		 1233 if (!be->dai_link->no_pcm)
1234 continue;
35ea0655 1235
0c01f6ca 1236 w = snd_soc_dai_get_widget(be->cpu_dai, stream);
3c146465 1237
93597fae
KM		 1238 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1239 w ? w->name : "(not set)");
2e5894d7 1240
93597fae
KM		 1241 if (w == widget)
1242 return be;
35ea0655 1243
93597fae 1244 for_each_rtd_codec_dai(be, i, dai) {
0c01f6ca 1245 w = snd_soc_dai_get_widget(dai, stream);
3c146465 1246
93597fae 1247 if (w == widget)
01d7584c
LG		 1248 return be;
1249 }
1250 }
1251
9d6ee365 1252 /* Widget provided is not a BE */
01d7584c
LG		 1253 return NULL;
1254}
1255
01d7584c
LG		 1256static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1257 struct snd_soc_dapm_widget *widget)
1258{
09e88f8a 1259 struct snd_soc_dapm_widget *w;
01d7584c
LG		 1260 int i;
1261
09e88f8a
KM		 1262 for_each_dapm_widgets(list, i, w)
1263 if (widget == w)
01d7584c 1264 return 1;
01d7584c
LG		 1265
1266 return 0;
1267}
1268
5fdd022c
PS		 1269static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1270 enum snd_soc_dapm_direction dir)
1271{
1272 struct snd_soc_card *card = widget->dapm->card;
1273 struct snd_soc_pcm_runtime *rtd;
c2cd8216 1274 int stream;
5fdd022c 1275
c2cd8216
KM		 1276 /* adjust dir to stream */
1277 if (dir == SND_SOC_DAPM_DIR_OUT)
1278 stream = SNDRV_PCM_STREAM_PLAYBACK;
1279 else
1280 stream = SNDRV_PCM_STREAM_CAPTURE;
5fdd022c 1281
027a4838
KM		 1282 rtd = dpcm_get_be(card, widget, stream);
1283 if (rtd)
1284 return true;
5fdd022c
PS		 1285
1286 return false;
1287}
1288
23607025 1289int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1ce43acf 1290 int stream, struct snd_soc_dapm_widget_list **list)
01d7584c
LG		 1291{
1292 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
01d7584c
LG		 1293 int paths;
1294
01d7584c 1295 /* get number of valid DAI paths and their widgets */
6742064a 1296 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
5fdd022c 1297 dpcm_end_walk_at_be);
01d7584c 1298
103d84a3 1299 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
01d7584c
LG		 1300 stream ? "capture" : "playback");
1301
01d7584c
LG		 1302 return paths;
1303}
1304
01d7584c
LG		 1305static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1306 struct snd_soc_dapm_widget_list **list_)
1307{
1308 struct snd_soc_dpcm *dpcm;
1309 struct snd_soc_dapm_widget_list *list = *list_;
1310 struct snd_soc_dapm_widget *widget;
7afecb30 1311 struct snd_soc_dai *dai;
01d7584c 1312 int prune = 0;
bed646dc 1313 int do_prune;
01d7584c
LG		 1314
1315 /* Destroy any old FE <--> BE connections */
8d6258a4 1316 for_each_dpcm_be(fe, stream, dpcm) {
2e5894d7 1317 unsigned int i;
01d7584c
LG		 1318
1319 /* is there a valid CPU DAI widget for this BE */
0c01f6ca 1320 widget = snd_soc_dai_get_widget(dpcm->be->cpu_dai, stream);
01d7584c
LG		 1321
1322 /* prune the BE if it's no longer in our active list */
1323 if (widget && widget_in_list(list, widget))
1324 continue;
1325
1326 /* is there a valid CODEC DAI widget for this BE */
bed646dc 1327 do_prune = 1;
7afecb30 1328 for_each_rtd_codec_dai(dpcm->be, i, dai) {
0c01f6ca 1329 widget = snd_soc_dai_get_widget(dai, stream);
01d7584c 1330
2e5894d7
BC		 1331 /* prune the BE if it's no longer in our active list */
1332 if (widget && widget_in_list(list, widget))
bed646dc 1333 do_prune = 0;
2e5894d7 1334 }
bed646dc
KM		 1335 if (!do_prune)
1336 continue;
01d7584c 1337
103d84a3 1338 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
01d7584c
LG		 1339 stream ? "capture" : "playback",
1340 dpcm->be->dai_link->name, fe->dai_link->name);
1341 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1342 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1343 prune++;
1344 }
1345
103d84a3 1346 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
01d7584c
LG		 1347 return prune;
1348}
1349
1350static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1351 struct snd_soc_dapm_widget_list **list_)
1352{
1353 struct snd_soc_card *card = fe->card;
1354 struct snd_soc_dapm_widget_list *list = *list_;
1355 struct snd_soc_pcm_runtime *be;
09e88f8a 1356 struct snd_soc_dapm_widget *widget;
01d7584c
LG		 1357 int i, new = 0, err;
1358
1359 /* Create any new FE <--> BE connections */
09e88f8a 1360 for_each_dapm_widgets(list, i, widget) {
01d7584c 1361
09e88f8a 1362 switch (widget->id) {
4616274d 1363 case snd_soc_dapm_dai_in:
c5b8540d
KC		 1364 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1365 continue;
1366 break;
4616274d 1367 case snd_soc_dapm_dai_out:
c5b8540d
KC		 1368 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1369 continue;
4616274d
MB		 1370 break;
1371 default:
01d7584c 1372 continue;
4616274d 1373 }
01d7584c
LG		 1374
1375 /* is there a valid BE rtd for this widget */
09e88f8a 1376 be = dpcm_get_be(card, widget, stream);
01d7584c 1377 if (!be) {
103d84a3 1378 dev_err(fe->dev, "ASoC: no BE found for %s\n",
09e88f8a 1379 widget->name);
01d7584c
LG		 1380 continue;
1381 }
1382
1383 /* make sure BE is a real BE */
1384 if (!be->dai_link->no_pcm)
1385 continue;
1386
1387 /* don't connect if FE is not running */
23607025 1388 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
01d7584c
LG		 1389 continue;
1390
1391 /* newly connected FE and BE */
1392 err = dpcm_be_connect(fe, be, stream);
1393 if (err < 0) {
103d84a3 1394 dev_err(fe->dev, "ASoC: can't connect %s\n",
09e88f8a 1395 widget->name);
01d7584c
LG		 1396 break;
1397 } else if (err == 0) /* already connected */
1398 continue;
1399
1400 /* new */
1401 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1402 new++;
1403 }
1404
103d84a3 1405 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
01d7584c
LG		 1406 return new;
1407}
1408
1409/*
1410 * Find the corresponding BE DAIs that source or sink audio to this
1411 * FE substream.
1412 */
23607025 1413int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
01d7584c
LG		 1414 int stream, struct snd_soc_dapm_widget_list **list, int new)
1415{
1416 if (new)
1417 return dpcm_add_paths(fe, stream, list);
1418 else
1419 return dpcm_prune_paths(fe, stream, list);
1420}
1421
23607025 1422void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1423{
1424 struct snd_soc_dpcm *dpcm;
a9764869 1425 unsigned long flags;
01d7584c 1426
a9764869 1427 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 1428 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 1429 dpcm->be->dpcm[stream].runtime_update =
1430 SND_SOC_DPCM_UPDATE_NO;
a9764869 1431 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1432}
1433
1434static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1435 int stream)
1436{
1437 struct snd_soc_dpcm *dpcm;
1438
1439 /* disable any enabled and non active backends */
8d6258a4 1440 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1441
1442 struct snd_soc_pcm_runtime *be = dpcm->be;
1443 struct snd_pcm_substream *be_substream =
1444 snd_soc_dpcm_get_substream(be, stream);
1445
1446 if (be->dpcm[stream].users == 0)
103d84a3 1447 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1448 stream ? "capture" : "playback",
1449 be->dpcm[stream].state);
1450
1451 if (--be->dpcm[stream].users != 0)
1452 continue;
1453
1454 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1455 continue;
1456
1457 soc_pcm_close(be_substream);
1458 be_substream->runtime = NULL;
1459 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1460 }
1461}
1462
23607025 1463int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1464{
1465 struct snd_soc_dpcm *dpcm;
1466 int err, count = 0;
1467
1468 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
8d6258a4 1469 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1470
1471 struct snd_soc_pcm_runtime *be = dpcm->be;
1472 struct snd_pcm_substream *be_substream =
1473 snd_soc_dpcm_get_substream(be, stream);
1474
2062b4c5
RKAL		 1475 if (!be_substream) {
1476 dev_err(be->dev, "ASoC: no backend %s stream\n",
1477 stream ? "capture" : "playback");
1478 continue;
1479 }
1480
01d7584c
LG		 1481 /* is this op for this BE ? */
1482 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1483 continue;
1484
1485 /* first time the dpcm is open ? */
1486 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
103d84a3 1487 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
01d7584c
LG		 1488 stream ? "capture" : "playback",
1489 be->dpcm[stream].state);
1490
1491 if (be->dpcm[stream].users++ != 0)
1492 continue;
1493
1494 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1495 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1496 continue;
1497
2062b4c5
RKAL		 1498 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1499 stream ? "capture" : "playback", be->dai_link->name);
01d7584c
LG		 1500
1501 be_substream->runtime = be->dpcm[stream].runtime;
1502 err = soc_pcm_open(be_substream);
1503 if (err < 0) {
103d84a3 1504 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
01d7584c
LG		 1505 be->dpcm[stream].users--;
1506 if (be->dpcm[stream].users < 0)
103d84a3 1507 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
01d7584c
LG		 1508 stream ? "capture" : "playback",
1509 be->dpcm[stream].state);
1510
1511 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1512 goto unwind;
1513 }
1514
1515 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1516 count++;
1517 }
1518
1519 return count;
1520
1521unwind:
1522 /* disable any enabled and non active backends */
8d6258a4 1523 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 1524 struct snd_soc_pcm_runtime *be = dpcm->be;
1525 struct snd_pcm_substream *be_substream =
1526 snd_soc_dpcm_get_substream(be, stream);
1527
1528 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1529 continue;
1530
1531 if (be->dpcm[stream].users == 0)
103d84a3 1532 dev_err(be->dev, "ASoC: no users %s at close %d\n",
01d7584c
LG		 1533 stream ? "capture" : "playback",
1534 be->dpcm[stream].state);
1535
1536 if (--be->dpcm[stream].users != 0)
1537 continue;
1538
1539 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1540 continue;
1541
1542 soc_pcm_close(be_substream);
1543 be_substream->runtime = NULL;
1544 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1545 }
1546
1547 return err;
1548}
1549
08ae9b45 1550static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
435ffb76 1551 struct snd_soc_pcm_stream *stream)
08ae9b45
LPC		 1552{
1553 runtime->hw.rate_min = stream->rate_min;
e33ffbd9 1554 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
08ae9b45
LPC		 1555 runtime->hw.channels_min = stream->channels_min;
1556 runtime->hw.channels_max = stream->channels_max;
002220a9 1557 if (runtime->hw.formats)
435ffb76 1558 runtime->hw.formats &= stream->formats;
002220a9 1559 else
435ffb76 1560 runtime->hw.formats = stream->formats;
08ae9b45
LPC		 1561 runtime->hw.rates = stream->rates;
1562}
1563
435ffb76
JB		 1564static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1565 u64 *formats)
b073ed4e
KM		 1566{
1567 struct snd_soc_pcm_runtime *fe = substream->private_data;
1568 struct snd_soc_dpcm *dpcm;
7afecb30 1569 struct snd_soc_dai *dai;
b073ed4e
KM		 1570 int stream = substream->stream;
1571
1572 if (!fe->dai_link->dpcm_merged_format)
435ffb76 1573 return;
b073ed4e
KM		 1574
1575 /*
1576 * It returns merged BE codec format
1577 * if FE want to use it (= dpcm_merged_format)
1578 */
1579
8d6258a4 1580 for_each_dpcm_be(fe, stream, dpcm) {
b073ed4e 1581 struct snd_soc_pcm_runtime *be = dpcm->be;
b073ed4e
KM		 1582 struct snd_soc_pcm_stream *codec_stream;
1583 int i;
1584
7afecb30 1585 for_each_rtd_codec_dai(be, i, dai) {
4febced1
JB		 1586 /*
1587 * Skip CODECs which don't support the current stream
1588 * type. See soc_pcm_init_runtime_hw() for more details
1589 */
7afecb30 1590 if (!snd_soc_dai_stream_valid(dai, stream))
4febced1
JB		 1591 continue;
1592
acf253c1 1593 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
b073ed4e 1594
435ffb76 1595 *formats &= codec_stream->formats;
b073ed4e
KM		 1596 }
1597 }
b073ed4e
KM		 1598}
1599
435ffb76
JB		 1600static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1601 unsigned int *channels_min,
1602 unsigned int *channels_max)
f4c277b8
JW		 1603{
1604 struct snd_soc_pcm_runtime *fe = substream->private_data;
1605 struct snd_soc_dpcm *dpcm;
1606 int stream = substream->stream;
1607
1608 if (!fe->dai_link->dpcm_merged_chan)
1609 return;
1610
f4c277b8
JW		 1611 /*
1612 * It returns merged BE codec channel;
1613 * if FE want to use it (= dpcm_merged_chan)
1614 */
1615
8d6258a4 1616 for_each_dpcm_be(fe, stream, dpcm) {
f4c277b8 1617 struct snd_soc_pcm_runtime *be = dpcm->be;
f4c277b8 1618 struct snd_soc_pcm_stream *codec_stream;
4f2bd18b
JB		 1619 struct snd_soc_pcm_stream *cpu_stream;
1620
acf253c1 1621 cpu_stream = snd_soc_dai_get_pcm_stream(be->cpu_dai, stream);
4f2bd18b
JB		 1622
1623 *channels_min = max(*channels_min, cpu_stream->channels_min);
1624 *channels_max = min(*channels_max, cpu_stream->channels_max);
1625
1626 /*
1627 * chan min/max cannot be enforced if there are multiple CODEC
1628 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1629 */
1630 if (be->num_codecs == 1) {
acf253c1 1631 codec_stream = snd_soc_dai_get_pcm_stream(be->codec_dais[0], stream);
f4c277b8
JW		 1632
1633 *channels_min = max(*channels_min,
1634 codec_stream->channels_min);
1635 *channels_max = min(*channels_max,
1636 codec_stream->channels_max);
1637 }
1638 }
1639}
1640
baacd8d1
JB		 1641static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1642 unsigned int *rates,
1643 unsigned int *rate_min,
1644 unsigned int *rate_max)
1645{
1646 struct snd_soc_pcm_runtime *fe = substream->private_data;
1647 struct snd_soc_dpcm *dpcm;
1648 int stream = substream->stream;
1649
1650 if (!fe->dai_link->dpcm_merged_rate)
1651 return;
1652
1653 /*
1654 * It returns merged BE codec channel;
1655 * if FE want to use it (= dpcm_merged_chan)
1656 */
1657
8d6258a4 1658 for_each_dpcm_be(fe, stream, dpcm) {
baacd8d1 1659 struct snd_soc_pcm_runtime *be = dpcm->be;
baacd8d1
JB		 1660 struct snd_soc_pcm_stream *codec_stream;
1661 struct snd_soc_pcm_stream *cpu_stream;
7afecb30 1662 struct snd_soc_dai *dai;
baacd8d1
JB		 1663 int i;
1664
acf253c1 1665 cpu_stream = snd_soc_dai_get_pcm_stream(be->cpu_dai, stream);
baacd8d1
JB		 1666
1667 *rate_min = max(*rate_min, cpu_stream->rate_min);
1668 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1669 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1670
7afecb30 1671 for_each_rtd_codec_dai(be, i, dai) {
baacd8d1
JB		 1672 /*
1673 * Skip CODECs which don't support the current stream
1674 * type. See soc_pcm_init_runtime_hw() for more details
1675 */
7afecb30 1676 if (!snd_soc_dai_stream_valid(dai, stream))
baacd8d1
JB		 1677 continue;
1678
acf253c1 1679 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
baacd8d1
JB		 1680
1681 *rate_min = max(*rate_min, codec_stream->rate_min);
1682 *rate_max = min_not_zero(*rate_max,
1683 codec_stream->rate_max);
1684 *rates = snd_pcm_rate_mask_intersect(*rates,
1685 codec_stream->rates);
1686 }
1687 }
1688}
1689
45c0a188 1690static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
01d7584c
LG		 1691{
1692 struct snd_pcm_runtime *runtime = substream->runtime;
1693 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1694 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1695 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1696
08ae9b45 1697 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435ffb76 1698 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
08ae9b45 1699 else
435ffb76 1700 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
f4c277b8 1701
435ffb76
JB		 1702 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1703 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1704 &runtime->hw.channels_max);
baacd8d1
JB		 1705 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1706 &runtime->hw.rate_min, &runtime->hw.rate_max);
01d7584c
LG		 1707}
1708
ea9d0d77
TI		 1709static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1710
1711/* Set FE's runtime_update state; the state is protected via PCM stream lock
1712 * for avoiding the race with trigger callback.
1713 * If the state is unset and a trigger is pending while the previous operation,
1714 * process the pending trigger action here.
1715 */
1716static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1717 int stream, enum snd_soc_dpcm_update state)
1718{
1719 struct snd_pcm_substream *substream =
1720 snd_soc_dpcm_get_substream(fe, stream);
1721
1722 snd_pcm_stream_lock_irq(substream);
1723 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1724 dpcm_fe_dai_do_trigger(substream,
1725 fe->dpcm[stream].trigger_pending - 1);
1726 fe->dpcm[stream].trigger_pending = 0;
1727 }
1728 fe->dpcm[stream].runtime_update = state;
1729 snd_pcm_stream_unlock_irq(substream);
1730}
1731
906c7d69
PL		 1732static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1733 int stream)
1734{
1735 struct snd_soc_dpcm *dpcm;
1736 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1737 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1738 int err;
1739
1740 /* apply symmetry for FE */
1741 if (soc_pcm_has_symmetry(fe_substream))
1742 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1743
1744 /* Symmetry only applies if we've got an active stream. */
1745 if (fe_cpu_dai->active) {
1746 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1747 if (err < 0)
1748 return err;
1749 }
1750
1751 /* apply symmetry for BE */
8d6258a4 1752 for_each_dpcm_be(fe, stream, dpcm) {
906c7d69
PL		 1753 struct snd_soc_pcm_runtime *be = dpcm->be;
1754 struct snd_pcm_substream *be_substream =
1755 snd_soc_dpcm_get_substream(be, stream);
6246f283 1756 struct snd_soc_pcm_runtime *rtd;
0b7990e3 1757 struct snd_soc_dai *codec_dai;
906c7d69
PL		 1758 int i;
1759
6246f283
JB		 1760 /* A backend may not have the requested substream */
1761 if (!be_substream)
1762 continue;
1763
1764 rtd = be_substream->private_data;
f1176614
JK		 1765 if (rtd->dai_link->be_hw_params_fixup)
1766 continue;
1767
906c7d69
PL		 1768 if (soc_pcm_has_symmetry(be_substream))
1769 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1770
1771 /* Symmetry only applies if we've got an active stream. */
1772 if (rtd->cpu_dai->active) {
99bcedbd
KCC		 1773 err = soc_pcm_apply_symmetry(fe_substream,
1774 rtd->cpu_dai);
906c7d69
PL		 1775 if (err < 0)
1776 return err;
1777 }
1778
0b7990e3
KM		 1779 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1780 if (codec_dai->active) {
99bcedbd 1781 err = soc_pcm_apply_symmetry(fe_substream,
0b7990e3 1782 codec_dai);
906c7d69
PL		 1783 if (err < 0)
1784 return err;
1785 }
1786 }
1787 }
1788
1789 return 0;
1790}
1791
01d7584c
LG		 1792static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1793{
1794 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1795 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1796 int stream = fe_substream->stream, ret = 0;
1797
ea9d0d77 1798 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1799
1800 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1801 if (ret < 0) {
103d84a3 1802 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
01d7584c
LG		 1803 goto be_err;
1804 }
1805
103d84a3 1806 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
01d7584c
LG		 1807
1808 /* start the DAI frontend */
1809 ret = soc_pcm_open(fe_substream);
1810 if (ret < 0) {
103d84a3 1811 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
01d7584c
LG		 1812 goto unwind;
1813 }
1814
1815 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1816
1817 dpcm_set_fe_runtime(fe_substream);
1818 snd_pcm_limit_hw_rates(runtime);
1819
906c7d69
PL		 1820 ret = dpcm_apply_symmetry(fe_substream, stream);
1821 if (ret < 0) {
1822 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1823 ret);
1824 goto unwind;
1825 }
1826
ea9d0d77 1827 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1828 return 0;
1829
1830unwind:
1831 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1832be_err:
ea9d0d77 1833 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1834 return ret;
1835}
1836
23607025 1837int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1838{
1839 struct snd_soc_dpcm *dpcm;
1840
1841 /* only shutdown BEs that are either sinks or sources to this FE DAI */
8d6258a4 1842 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1843
1844 struct snd_soc_pcm_runtime *be = dpcm->be;
1845 struct snd_pcm_substream *be_substream =
1846 snd_soc_dpcm_get_substream(be, stream);
1847
1848 /* is this op for this BE ? */
1849 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1850 continue;
1851
1852 if (be->dpcm[stream].users == 0)
103d84a3 1853 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1854 stream ? "capture" : "playback",
1855 be->dpcm[stream].state);
1856
1857 if (--be->dpcm[stream].users != 0)
1858 continue;
1859
1860 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
9c0ac70a
KCC		 1861 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1862 soc_pcm_hw_free(be_substream);
1863 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1864 }
01d7584c 1865
103d84a3 1866 dev_dbg(be->dev, "ASoC: close BE %s\n",
94d215cc 1867 be->dai_link->name);
01d7584c
LG		 1868
1869 soc_pcm_close(be_substream);
1870 be_substream->runtime = NULL;
1871
1872 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1873 }
1874 return 0;
1875}
1876
1877static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1878{
1879 struct snd_soc_pcm_runtime *fe = substream->private_data;
1880 int stream = substream->stream;
1881
ea9d0d77 1882 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1883
1884 /* shutdown the BEs */
1885 dpcm_be_dai_shutdown(fe, substream->stream);
1886
103d84a3 1887 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
01d7584c
LG		 1888
1889 /* now shutdown the frontend */
1890 soc_pcm_close(substream);
1891
1892 /* run the stream event for each BE */
b0edff42 1893 snd_soc_dapm_stream_stop(fe, stream);
01d7584c
LG		 1894
1895 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
ea9d0d77 1896 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1897 return 0;
1898}
1899
23607025 1900int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1901{
1902 struct snd_soc_dpcm *dpcm;
1903
1904 /* only hw_params backends that are either sinks or sources
1905 * to this frontend DAI */
8d6258a4 1906 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1907
1908 struct snd_soc_pcm_runtime *be = dpcm->be;
1909 struct snd_pcm_substream *be_substream =
1910 snd_soc_dpcm_get_substream(be, stream);
1911
1912 /* is this op for this BE ? */
1913 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1914 continue;
1915
1916 /* only free hw when no longer used - check all FEs */
1917 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1918 continue;
1919
36fba62c
QZ		 1920 /* do not free hw if this BE is used by other FE */
1921 if (be->dpcm[stream].users > 1)
1922 continue;
1923
01d7584c
LG		 1924 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1925 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1926 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
08b27848 1927 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
5e82d2be
VK		 1928 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1929 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
01d7584c
LG		 1930 continue;
1931
103d84a3 1932 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
94d215cc 1933 be->dai_link->name);
01d7584c
LG		 1934
1935 soc_pcm_hw_free(be_substream);
1936
1937 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1938 }
1939
1940 return 0;
1941}
1942
45c0a188 1943static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c
LG		 1944{
1945 struct snd_soc_pcm_runtime *fe = substream->private_data;
1946 int err, stream = substream->stream;
1947
1948 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 1949 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 1950
103d84a3 1951 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
01d7584c
LG		 1952
1953 /* call hw_free on the frontend */
1954 err = soc_pcm_hw_free(substream);
1955 if (err < 0)
103d84a3 1956 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
01d7584c
LG		 1957 fe->dai_link->name);
1958
1959 /* only hw_params backends that are either sinks or sources
1960 * to this frontend DAI */
1961 err = dpcm_be_dai_hw_free(fe, stream);
1962
1963 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
ea9d0d77 1964 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1965
1966 mutex_unlock(&fe->card->mutex);
1967 return 0;
1968}
1969
23607025 1970int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1971{
1972 struct snd_soc_dpcm *dpcm;
1973 int ret;
1974
8d6258a4 1975 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1976
1977 struct snd_soc_pcm_runtime *be = dpcm->be;
1978 struct snd_pcm_substream *be_substream =
1979 snd_soc_dpcm_get_substream(be, stream);
1980
1981 /* is this op for this BE ? */
1982 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1983 continue;
1984
01d7584c
LG		 1985 /* copy params for each dpcm */
1986 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1987 sizeof(struct snd_pcm_hw_params));
1988
1989 /* perform any hw_params fixups */
1990 if (be->dai_link->be_hw_params_fixup) {
1991 ret = be->dai_link->be_hw_params_fixup(be,
1992 &dpcm->hw_params);
1993 if (ret < 0) {
1994 dev_err(be->dev,
103d84a3 1995 "ASoC: hw_params BE fixup failed %d\n",
01d7584c
LG		 1996 ret);
1997 goto unwind;
1998 }
1999 }
2000
ae061d2a
LY		 2001 /* copy the fixed-up hw params for BE dai */
2002 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2003 sizeof(struct snd_pcm_hw_params));
2004
b0639bd2
KM		 2005 /* only allow hw_params() if no connected FEs are running */
2006 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2007 continue;
2008
2009 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2010 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2012 continue;
2013
2014 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
94d215cc 2015 be->dai_link->name);
b0639bd2 2016
01d7584c
LG		 2017 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2018 if (ret < 0) {
2019 dev_err(dpcm->be->dev,
103d84a3 2020 "ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2021 goto unwind;
2022 }
2023
2024 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2025 }
2026 return 0;
2027
2028unwind:
2029 /* disable any enabled and non active backends */
8d6258a4 2030 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 2031 struct snd_soc_pcm_runtime *be = dpcm->be;
2032 struct snd_pcm_substream *be_substream =
2033 snd_soc_dpcm_get_substream(be, stream);
2034
2035 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2036 continue;
2037
2038 /* only allow hw_free() if no connected FEs are running */
2039 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2040 continue;
2041
2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2046 continue;
2047
2048 soc_pcm_hw_free(be_substream);
2049 }
2050
2051 return ret;
2052}
2053
45c0a188
MB		 2054static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2055 struct snd_pcm_hw_params *params)
01d7584c
LG		 2056{
2057 struct snd_soc_pcm_runtime *fe = substream->private_data;
2058 int ret, stream = substream->stream;
2059
2060 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 2061 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2062
2063 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2064 sizeof(struct snd_pcm_hw_params));
2065 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2066 if (ret < 0) {
103d84a3 2067 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2068 goto out;
2069 }
2070
103d84a3 2071 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
01d7584c
LG		 2072 fe->dai_link->name, params_rate(params),
2073 params_channels(params), params_format(params));
2074
2075 /* call hw_params on the frontend */
2076 ret = soc_pcm_hw_params(substream, params);
2077 if (ret < 0) {
103d84a3 2078 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
01d7584c
LG		 2079 dpcm_be_dai_hw_free(fe, stream);
2080 } else
2081 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2082
2083out:
ea9d0d77 2084 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2085 mutex_unlock(&fe->card->mutex);
2086 return ret;
2087}
2088
2089static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2090 struct snd_pcm_substream *substream, int cmd)
2091{
2092 int ret;
2093
103d84a3 2094 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
94d215cc 2095 dpcm->be->dai_link->name, cmd);
01d7584c
LG		 2096
2097 ret = soc_pcm_trigger(substream, cmd);
2098 if (ret < 0)
103d84a3 2099 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
01d7584c
LG		 2100
2101 return ret;
2102}
2103
23607025 2104int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
45c0a188 2105 int cmd)
01d7584c
LG		 2106{
2107 struct snd_soc_dpcm *dpcm;
2108 int ret = 0;
2109
8d6258a4 2110 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2111
2112 struct snd_soc_pcm_runtime *be = dpcm->be;
2113 struct snd_pcm_substream *be_substream =
2114 snd_soc_dpcm_get_substream(be, stream);
2115
2116 /* is this op for this BE ? */
2117 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2118 continue;
2119
2120 switch (cmd) {
2121 case SNDRV_PCM_TRIGGER_START:
2122 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2123 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2124 continue;
2125
2126 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2127 if (ret)
2128 return ret;
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 continue;
2135
2136 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2137 if (ret)
2138 return ret;
2139
2140 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2141 break;
2142 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2143 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2144 continue;
2145
2146 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2147 if (ret)
2148 return ret;
2149
2150 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2151 break;
2152 case SNDRV_PCM_TRIGGER_STOP:
2153 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2154 continue;
2155
2156 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2157 continue;
2158
2159 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2160 if (ret)
2161 return ret;
2162
2163 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2164 break;
2165 case SNDRV_PCM_TRIGGER_SUSPEND:
868a6ca8 2166 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
01d7584c
LG		 2167 continue;
2168
2169 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2170 continue;
2171
2172 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2173 if (ret)
2174 return ret;
2175
2176 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2177 break;
2178 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2179 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2180 continue;
2181
2182 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2183 continue;
2184
2185 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2186 if (ret)
2187 return ret;
2188
2189 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2190 break;
2191 }
2192 }
2193
2194 return ret;
2195}
2196EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2197
acbf2774
RS		 2198static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2199 int cmd, bool fe_first)
2200{
2201 struct snd_soc_pcm_runtime *fe = substream->private_data;
2202 int ret;
2203
2204 /* call trigger on the frontend before the backend. */
2205 if (fe_first) {
2206 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2207 fe->dai_link->name, cmd);
2208
2209 ret = soc_pcm_trigger(substream, cmd);
2210 if (ret < 0)
2211 return ret;
2212
2213 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2214 return ret;
2215 }
2216
2217 /* call trigger on the frontend after the backend. */
2218 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2219 if (ret < 0)
2220 return ret;
2221
2222 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2223 fe->dai_link->name, cmd);
2224
2225 ret = soc_pcm_trigger(substream, cmd);
2226
2227 return ret;
2228}
2229
ea9d0d77 2230static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c
LG		 2231{
2232 struct snd_soc_pcm_runtime *fe = substream->private_data;
acbf2774
RS		 2233 int stream = substream->stream;
2234 int ret = 0;
01d7584c
LG		 2235 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2236
2237 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2238
2239 switch (trigger) {
2240 case SND_SOC_DPCM_TRIGGER_PRE:
acbf2774
RS		 2241 switch (cmd) {
2242 case SNDRV_PCM_TRIGGER_START:
2243 case SNDRV_PCM_TRIGGER_RESUME:
2244 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2245 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2246 break;
2247 case SNDRV_PCM_TRIGGER_STOP:
2248 case SNDRV_PCM_TRIGGER_SUSPEND:
2249 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2250 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2251 break;
2252 default:
2253 ret = -EINVAL;
2254 break;
01d7584c 2255 }
01d7584c
LG		 2256 break;
2257 case SND_SOC_DPCM_TRIGGER_POST:
acbf2774
RS		 2258 switch (cmd) {
2259 case SNDRV_PCM_TRIGGER_START:
2260 case SNDRV_PCM_TRIGGER_RESUME:
2261 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2262 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2263 break;
2264 case SNDRV_PCM_TRIGGER_STOP:
2265 case SNDRV_PCM_TRIGGER_SUSPEND:
2266 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2267 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2268 break;
2269 default:
2270 ret = -EINVAL;
2271 break;
01d7584c 2272 }
01d7584c 2273 break;
07bf84aa
LG		 2274 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2275 /* bespoke trigger() - handles both FE and BEs */
2276
103d84a3 2277 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
07bf84aa
LG		 2278 fe->dai_link->name, cmd);
2279
2280 ret = soc_pcm_bespoke_trigger(substream, cmd);
07bf84aa 2281 break;
01d7584c 2282 default:
103d84a3 2283 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
01d7584c
LG		 2284 fe->dai_link->name);
2285 ret = -EINVAL;
2286 goto out;
2287 }
2288
acbf2774
RS		 2289 if (ret < 0) {
2290 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2291 cmd, ret);
2292 goto out;
2293 }
2294
01d7584c
LG		 2295 switch (cmd) {
2296 case SNDRV_PCM_TRIGGER_START:
2297 case SNDRV_PCM_TRIGGER_RESUME:
2298 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2299 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2300 break;
2301 case SNDRV_PCM_TRIGGER_STOP:
2302 case SNDRV_PCM_TRIGGER_SUSPEND:
01d7584c
LG		 2303 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2304 break;
9f169b9f
PL		 2305 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2306 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2307 break;
01d7584c
LG		 2308 }
2309
2310out:
2311 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2312 return ret;
2313}
2314
ea9d0d77
TI		 2315static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2316{
2317 struct snd_soc_pcm_runtime *fe = substream->private_data;
2318 int stream = substream->stream;
2319
2320 /* if FE's runtime_update is already set, we're in race;
2321 * process this trigger later at exit
2322 */
2323 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2324 fe->dpcm[stream].trigger_pending = cmd + 1;
2325 return 0; /* delayed, assuming it's successful */
2326 }
2327
2328 /* we're alone, let's trigger */
2329 return dpcm_fe_dai_do_trigger(substream, cmd);
2330}
2331
23607025 2332int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2333{
2334 struct snd_soc_dpcm *dpcm;
2335 int ret = 0;
2336
8d6258a4 2337 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2338
2339 struct snd_soc_pcm_runtime *be = dpcm->be;
2340 struct snd_pcm_substream *be_substream =
2341 snd_soc_dpcm_get_substream(be, stream);
2342
2343 /* is this op for this BE ? */
2344 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2345 continue;
2346
2347 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
95f444dc 2348 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
5087a8f1
LY		 2349 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2350 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
01d7584c
LG		 2351 continue;
2352
103d84a3 2353 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
94d215cc 2354 be->dai_link->name);
01d7584c
LG		 2355
2356 ret = soc_pcm_prepare(be_substream);
2357 if (ret < 0) {
103d84a3 2358 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
01d7584c
LG		 2359 ret);
2360 break;
2361 }
2362
2363 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2364 }
2365 return ret;
2366}
2367
45c0a188 2368static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c
LG		 2369{
2370 struct snd_soc_pcm_runtime *fe = substream->private_data;
2371 int stream = substream->stream, ret = 0;
2372
2373 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2374
103d84a3 2375 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
01d7584c 2376
ea9d0d77 2377 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2378
2379 /* there is no point preparing this FE if there are no BEs */
2380 if (list_empty(&fe->dpcm[stream].be_clients)) {
103d84a3 2381 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
01d7584c
LG		 2382 fe->dai_link->name);
2383 ret = -EINVAL;
2384 goto out;
2385 }
2386
2387 ret = dpcm_be_dai_prepare(fe, substream->stream);
2388 if (ret < 0)
2389 goto out;
2390
2391 /* call prepare on the frontend */
2392 ret = soc_pcm_prepare(substream);
2393 if (ret < 0) {
103d84a3 2394 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
01d7584c
LG		 2395 fe->dai_link->name);
2396 goto out;
2397 }
2398
2399 /* run the stream event for each BE */
2400 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2401 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2402
2403out:
ea9d0d77 2404 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2405 mutex_unlock(&fe->card->mutex);
2406
2407 return ret;
2408}
2409
618dae11
LG		 2410static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2411{
07bf84aa
LG		 2412 struct snd_pcm_substream *substream =
2413 snd_soc_dpcm_get_substream(fe, stream);
2414 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 2415 int err;
2416
103d84a3 2417 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
618dae11
LG		 2418 stream ? "capture" : "playback", fe->dai_link->name);
2419
07bf84aa
LG		 2420 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2421 /* call bespoke trigger - FE takes care of all BE triggers */
103d84a3 2422 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
07bf84aa
LG		 2423 fe->dai_link->name);
2424
2425 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2426 if (err < 0)
103d84a3 2427 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2428 } else {
103d84a3 2429 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
07bf84aa
LG		 2430 fe->dai_link->name);
2431
2432 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2433 if (err < 0)
103d84a3 2434 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2435 }
618dae11
LG		 2436
2437 err = dpcm_be_dai_hw_free(fe, stream);
2438 if (err < 0)
103d84a3 2439 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
618dae11
LG		 2440
2441 err = dpcm_be_dai_shutdown(fe, stream);
2442 if (err < 0)
103d84a3 2443 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
618dae11
LG		 2444
2445 /* run the stream event for each BE */
2446 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2447
2448 return 0;
2449}
2450
2451static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2452{
07bf84aa
LG		 2453 struct snd_pcm_substream *substream =
2454 snd_soc_dpcm_get_substream(fe, stream);
618dae11 2455 struct snd_soc_dpcm *dpcm;
07bf84aa 2456 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11 2457 int ret;
a9764869 2458 unsigned long flags;
618dae11 2459
103d84a3 2460 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
618dae11
LG		 2461 stream ? "capture" : "playback", fe->dai_link->name);
2462
2463 /* Only start the BE if the FE is ready */
2464 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2465 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2466 return -EINVAL;
2467
2468 /* startup must always be called for new BEs */
2469 ret = dpcm_be_dai_startup(fe, stream);
fffc0ca2 2470 if (ret < 0)
618dae11 2471 goto disconnect;
618dae11
LG		 2472
2473 /* keep going if FE state is > open */
2474 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2475 return 0;
01d7584c 2476
618dae11 2477 ret = dpcm_be_dai_hw_params(fe, stream);
fffc0ca2 2478 if (ret < 0)
618dae11 2479 goto close;
618dae11
LG		 2480
2481 /* keep going if FE state is > hw_params */
2482 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2483 return 0;
2484
2485
2486 ret = dpcm_be_dai_prepare(fe, stream);
fffc0ca2 2487 if (ret < 0)
618dae11 2488 goto hw_free;
618dae11
LG		 2489
2490 /* run the stream event for each BE */
2491 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2492
2493 /* keep going if FE state is > prepare */
2494 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2495 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2496 return 0;
2497
07bf84aa
LG		 2498 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2499 /* call trigger on the frontend - FE takes care of all BE triggers */
103d84a3 2500 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
07bf84aa 2501 fe->dai_link->name);
618dae11 2502
07bf84aa
LG		 2503 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2504 if (ret < 0) {
103d84a3 2505 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
07bf84aa
LG		 2506 goto hw_free;
2507 }
2508 } else {
103d84a3 2509 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
07bf84aa
LG		 2510 fe->dai_link->name);
2511
2512 ret = dpcm_be_dai_trigger(fe, stream,
2513 SNDRV_PCM_TRIGGER_START);
2514 if (ret < 0) {
103d84a3 2515 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
07bf84aa
LG		 2516 goto hw_free;
2517 }
618dae11
LG		 2518 }
2519
2520 return 0;
2521
2522hw_free:
2523 dpcm_be_dai_hw_free(fe, stream);
2524close:
2525 dpcm_be_dai_shutdown(fe, stream);
2526disconnect:
2527 /* disconnect any non started BEs */
a9764869 2528 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 2529 for_each_dpcm_be(fe, stream, dpcm) {
618dae11
LG		 2530 struct snd_soc_pcm_runtime *be = dpcm->be;
2531 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2532 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2533 }
a9764869 2534 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
618dae11
LG		 2535
2536 return ret;
2537}
2538
2539static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2540{
2541 int ret;
2542
ea9d0d77 2543 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2544 ret = dpcm_run_update_startup(fe, stream);
2545 if (ret < 0)
103d84a3 2546 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
ea9d0d77 2547 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2548
2549 return ret;
2550}
2551
2552static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2553{
2554 int ret;
2555
ea9d0d77 2556 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2557 ret = dpcm_run_update_shutdown(fe, stream);
2558 if (ret < 0)
103d84a3 2559 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
ea9d0d77 2560 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2561
2562 return ret;
2563}
2564
de15d7ff 2565static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
618dae11 2566{
de15d7ff 2567 struct snd_soc_dapm_widget_list *list;
7083f877 2568 int stream;
de15d7ff 2569 int count, paths;
618dae11 2570
de15d7ff
JB		 2571 if (!fe->dai_link->dynamic)
2572 return 0;
618dae11 2573
de15d7ff
JB		 2574 /* only check active links */
2575 if (!fe->cpu_dai->active)
2576 return 0;
618dae11 2577
de15d7ff
JB		 2578 /* DAPM sync will call this to update DSP paths */
2579 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2580 new ? "new" : "old", fe->dai_link->name);
618dae11 2581
7083f877 2582 for_each_pcm_streams(stream) {
618dae11 2583
7083f877
KM		 2584 /* skip if FE doesn't have playback/capture capability */
2585 if (!snd_soc_dai_stream_valid(fe->cpu_dai, stream) ||
2586 !snd_soc_dai_stream_valid(fe->codec_dai, stream))
2587 continue;
de15d7ff 2588
7083f877
KM		 2589 /* skip if FE isn't currently playing/capturing */
2590 if (!fe->cpu_dai->stream_active[stream] ||
2591 !fe->codec_dai->stream_active[stream])
2592 continue;
075207d2 2593
7083f877
KM		 2594 paths = dpcm_path_get(fe, stream, &list);
2595 if (paths < 0) {
2596 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2597 fe->dai_link->name,
2598 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2599 "playback" : "capture");
2600 return paths;
2601 }
618dae11 2602
7083f877
KM		 2603 /* update any playback/capture paths */
2604 count = dpcm_process_paths(fe, stream, &list, new);
2605 if (count) {
2606 if (new)
2607 dpcm_run_new_update(fe, stream);
2608 else
2609 dpcm_run_old_update(fe, stream);
618dae11 2610
7083f877
KM		 2611 dpcm_clear_pending_state(fe, stream);
2612 dpcm_be_disconnect(fe, stream);
2613 }
618dae11 2614
7083f877 2615 dpcm_path_put(&list);
618dae11
LG		 2616 }
2617
618dae11
LG		 2618 return 0;
2619}
de15d7ff
JB		 2620
2621/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2622 * any DAI links.
2623 */
2624int soc_dpcm_runtime_update(struct snd_soc_card *card)
2625{
2626 struct snd_soc_pcm_runtime *fe;
2627 int ret = 0;
2628
2629 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2630 /* shutdown all old paths first */
bcb1fd1f 2631 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2632 ret = soc_dpcm_fe_runtime_update(fe, 0);
2633 if (ret)
2634 goto out;
2635 }
2636
2637 /* bring new paths up */
bcb1fd1f 2638 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2639 ret = soc_dpcm_fe_runtime_update(fe, 1);
2640 if (ret)
2641 goto out;
2642 }
2643
2644out:
2645 mutex_unlock(&card->mutex);
2646 return ret;
2647}
01d7584c 2648
45c0a188 2649static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2650{
2651 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2652 struct snd_soc_dpcm *dpcm;
2653 struct snd_soc_dapm_widget_list *list;
2654 int ret;
2655 int stream = fe_substream->stream;
2656
2657 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2658 fe->dpcm[stream].runtime = fe_substream->runtime;
2659
8f70e515
QZ		 2660 ret = dpcm_path_get(fe, stream, &list);
2661 if (ret < 0) {
cae06eb9 2662 goto open_end;
8f70e515 2663 } else if (ret == 0) {
103d84a3 2664 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
01d7584c 2665 fe->dai_link->name, stream ? "capture" : "playback");
01d7584c
LG		 2666 }
2667
2668 /* calculate valid and active FE <-> BE dpcms */
2669 dpcm_process_paths(fe, stream, &list, 1);
2670
2671 ret = dpcm_fe_dai_startup(fe_substream);
2672 if (ret < 0) {
2673 /* clean up all links */
8d6258a4 2674 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2675 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2676
2677 dpcm_be_disconnect(fe, stream);
2678 fe->dpcm[stream].runtime = NULL;
2679 }
2680
2681 dpcm_clear_pending_state(fe, stream);
2682 dpcm_path_put(&list);
cae06eb9 2683open_end:
01d7584c
LG		 2684 mutex_unlock(&fe->card->mutex);
2685 return ret;
2686}
2687
45c0a188 2688static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2689{
2690 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2691 struct snd_soc_dpcm *dpcm;
2692 int stream = fe_substream->stream, ret;
2693
2694 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2695 ret = dpcm_fe_dai_shutdown(fe_substream);
2696
2697 /* mark FE's links ready to prune */
8d6258a4 2698 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2699 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2700
2701 dpcm_be_disconnect(fe, stream);
2702
2703 fe->dpcm[stream].runtime = NULL;
2704 mutex_unlock(&fe->card->mutex);
2705 return ret;
2706}
2707
ddee627c
LG		 2708/* create a new pcm */
2709int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2710{
2e5894d7 2711 struct snd_soc_dai *codec_dai;
ddee627c 2712 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2b544dd7 2713 struct snd_soc_component *component;
ddee627c
LG		 2714 struct snd_pcm *pcm;
2715 char new_name[64];
2716 int ret = 0, playback = 0, capture = 0;
2e5894d7 2717 int i;
ddee627c 2718
01d7584c 2719 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
1e9de42f
LG		 2720 playback = rtd->dai_link->dpcm_playback;
2721 capture = rtd->dai_link->dpcm_capture;
01d7584c 2722 } else {
a342031c 2723 /* Adapt stream for codec2codec links */
a4877a6f
SG		 2724 int cpu_capture = rtd->dai_link->params ?
2725 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2726 int cpu_playback = rtd->dai_link->params ?
2727 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
a342031c 2728
0b7990e3 2729 for_each_rtd_codec_dai(rtd, i, codec_dai) {
467fece8 2730 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
a4877a6f 2731 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2e5894d7 2732 playback = 1;
467fece8 2733 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
a4877a6f 2734 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2e5894d7
BC		 2735 capture = 1;
2736 }
01d7584c
LG		 2737 }
2738
d6bead02
FE		 2739 if (rtd->dai_link->playback_only) {
2740 playback = 1;
2741 capture = 0;
2742 }
2743
2744 if (rtd->dai_link->capture_only) {
2745 playback = 0;
2746 capture = 1;
2747 }
2748
01d7584c 2749 /* create the PCM */
a342031c
JB		 2750 if (rtd->dai_link->params) {
2751 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2752 rtd->dai_link->stream_name);
2753
2754 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2755 playback, capture, &pcm);
2756 } else if (rtd->dai_link->no_pcm) {
01d7584c
LG		 2757 snprintf(new_name, sizeof(new_name), "(%s)",
2758 rtd->dai_link->stream_name);
2759
2760 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2761 playback, capture, &pcm);
2762 } else {
2763 if (rtd->dai_link->dynamic)
2764 snprintf(new_name, sizeof(new_name), "%s (*)",
2765 rtd->dai_link->stream_name);
2766 else
2767 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2e5894d7
BC		 2768 rtd->dai_link->stream_name,
2769 (rtd->num_codecs > 1) ?
2770 "multicodec" : rtd->codec_dai->name, num);
01d7584c
LG		 2771
2772 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2773 capture, &pcm);
2774 }
ddee627c 2775 if (ret < 0) {
103d84a3 2776 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
5cb9b748 2777 rtd->dai_link->name);
ddee627c
LG		 2778 return ret;
2779 }
103d84a3 2780 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
ddee627c
LG		 2781
2782 /* DAPM dai link stream work */
a342031c 2783 if (rtd->dai_link->params)
4bf2e385 2784 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
a342031c 2785 else
83f94a2e 2786 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
ddee627c 2787
48c7699f 2788 pcm->nonatomic = rtd->dai_link->nonatomic;
ddee627c
LG		 2789 rtd->pcm = pcm;
2790 pcm->private_data = rtd;
01d7584c 2791
a342031c 2792 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
01d7584c
LG		 2793 if (playback)
2794 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2795 if (capture)
2796 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2797 goto out;
2798 }
2799
2800 /* ASoC PCM operations */
2801 if (rtd->dai_link->dynamic) {
2802 rtd->ops.open = dpcm_fe_dai_open;
2803 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2804 rtd->ops.prepare = dpcm_fe_dai_prepare;
2805 rtd->ops.trigger = dpcm_fe_dai_trigger;
2806 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2807 rtd->ops.close = dpcm_fe_dai_close;
2808 rtd->ops.pointer = soc_pcm_pointer;
2809 } else {
2810 rtd->ops.open = soc_pcm_open;
2811 rtd->ops.hw_params = soc_pcm_hw_params;
2812 rtd->ops.prepare = soc_pcm_prepare;
2813 rtd->ops.trigger = soc_pcm_trigger;
2814 rtd->ops.hw_free = soc_pcm_hw_free;
2815 rtd->ops.close = soc_pcm_close;
2816 rtd->ops.pointer = soc_pcm_pointer;
2817 }
2818
613fb500 2819 for_each_rtd_components(rtd, i, component) {
2b544dd7 2820 const struct snd_soc_component_driver *drv = component->driver;
b8135864 2821
3b1c952c
TI		 2822 if (drv->ioctl)
2823 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
1e5ddb6b
TI		 2824 if (drv->sync_stop)
2825 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
e9067bb5 2826 if (drv->copy_user)
82d81f5c 2827 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
e9067bb5 2828 if (drv->page)
9c712e4f 2829 rtd->ops.page = snd_soc_pcm_component_page;
e9067bb5 2830 if (drv->mmap)
205875e1 2831 rtd->ops.mmap = snd_soc_pcm_component_mmap;
ddee627c
LG		 2832 }
2833
2834 if (playback)
01d7584c 2835 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 2836
2837 if (capture)
01d7584c 2838 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c 2839
b2b2afbb 2840 ret = snd_soc_pcm_component_new(rtd);
7484291e
KM		 2841 if (ret < 0) {
2842 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2843 return ret;
ddee627c 2844 }
c641e5b2 2845
3d21ef0b 2846 pcm->no_device_suspend = true;
01d7584c 2847out:
2e5894d7
BC		 2848 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2849 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2850 cpu_dai->name);
ddee627c
LG		 2851 return ret;
2852}
01d7584c
LG		 2853
2854/* is the current PCM operation for this FE ? */
2855int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2856{
2857 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2858 return 1;
2859 return 0;
2860}
2861EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2862
2863/* is the current PCM operation for this BE ? */
2864int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2865 struct snd_soc_pcm_runtime *be, int stream)
2866{
2867 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2868 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2869 be->dpcm[stream].runtime_update))
2870 return 1;
2871 return 0;
2872}
2873EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2874
2875/* get the substream for this BE */
2876struct snd_pcm_substream *
2877 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2878{
2879 return be->pcm->streams[stream].substream;
2880}
2881EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2882
085d22be
KM		 2883static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2884 struct snd_soc_pcm_runtime *be,
2885 int stream,
2886 const enum snd_soc_dpcm_state *states,
2887 int num_states)
01d7584c
LG		 2888{
2889 struct snd_soc_dpcm *dpcm;
2890 int state;
a9764869
KC		 2891 int ret = 1;
2892 unsigned long flags;
085d22be 2893 int i;
01d7584c 2894
a9764869 2895 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
d2e24d64 2896 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 2897
2898 if (dpcm->fe == fe)
2899 continue;
2900
2901 state = dpcm->fe->dpcm[stream].state;
085d22be
KM		 2902 for (i = 0; i < num_states; i++) {
2903 if (state == states[i]) {
2904 ret = 0;
2905 break;
2906 }
a9764869 2907 }
01d7584c 2908 }
a9764869 2909 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c 2910
085d22be 2911 /* it's safe to do this BE DAI */
a9764869 2912 return ret;
01d7584c 2913}
085d22be
KM		 2914
2915/*
2916 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2917 * are not running, paused or suspended for the specified stream direction.
2918 */
2919int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2920 struct snd_soc_pcm_runtime *be, int stream)
2921{
2922 const enum snd_soc_dpcm_state state[] = {
2923 SND_SOC_DPCM_STATE_START,
2924 SND_SOC_DPCM_STATE_PAUSED,
2925 SND_SOC_DPCM_STATE_SUSPEND,
2926 };
2927
2928 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2929}
01d7584c
LG		 2930EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2931
2932/*
2933 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2934 * running, paused or suspended for the specified stream direction.
2935 */
2936int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2937 struct snd_soc_pcm_runtime *be, int stream)
2938{
085d22be
KM		 2939 const enum snd_soc_dpcm_state state[] = {
2940 SND_SOC_DPCM_STATE_START,
2941 SND_SOC_DPCM_STATE_PAUSED,
2942 SND_SOC_DPCM_STATE_SUSPEND,
2943 SND_SOC_DPCM_STATE_PREPARE,
2944 };
01d7584c 2945
085d22be 2946 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
01d7584c
LG		 2947}
2948EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
f86dcef8
LG		 2949
2950#ifdef CONFIG_DEBUG_FS
85280141 2951static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
f86dcef8
LG		 2952{
2953 switch (state) {
2954 case SND_SOC_DPCM_STATE_NEW:
2955 return "new";
2956 case SND_SOC_DPCM_STATE_OPEN:
2957 return "open";
2958 case SND_SOC_DPCM_STATE_HW_PARAMS:
2959 return "hw_params";
2960 case SND_SOC_DPCM_STATE_PREPARE:
2961 return "prepare";
2962 case SND_SOC_DPCM_STATE_START:
2963 return "start";
2964 case SND_SOC_DPCM_STATE_STOP:
2965 return "stop";
2966 case SND_SOC_DPCM_STATE_SUSPEND:
2967 return "suspend";
2968 case SND_SOC_DPCM_STATE_PAUSED:
2969 return "paused";
2970 case SND_SOC_DPCM_STATE_HW_FREE:
2971 return "hw_free";
2972 case SND_SOC_DPCM_STATE_CLOSE:
2973 return "close";
2974 }
2975
2976 return "unknown";
2977}
2978
f86dcef8
LG		 2979static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2980 int stream, char *buf, size_t size)
2981{
2982 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2983 struct snd_soc_dpcm *dpcm;
2984 ssize_t offset = 0;
a9764869 2985 unsigned long flags;
f86dcef8
LG		 2986
2987 /* FE state */
2988 offset += snprintf(buf + offset, size - offset,
2989 "[%s - %s]\n", fe->dai_link->name,
2990 stream ? "Capture" : "Playback");
2991
2992 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2993 dpcm_state_string(fe->dpcm[stream].state));
2994
2995 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2996 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2997 offset += snprintf(buf + offset, size - offset,
2998 "Hardware Params: "
2999 "Format = %s, Channels = %d, Rate = %d\n",
3000 snd_pcm_format_name(params_format(params)),
3001 params_channels(params),
3002 params_rate(params));
3003
3004 /* BEs state */
3005 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3006
3007 if (list_empty(&fe->dpcm[stream].be_clients)) {
3008 offset += snprintf(buf + offset, size - offset,
3009 " No active DSP links\n");
3010 goto out;
3011 }
3012
a9764869 3013 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 3014 for_each_dpcm_be(fe, stream, dpcm) {
f86dcef8
LG		 3015 struct snd_soc_pcm_runtime *be = dpcm->be;
3016 params = &dpcm->hw_params;
3017
3018 offset += snprintf(buf + offset, size - offset,
3019 "- %s\n", be->dai_link->name);
3020
3021 offset += snprintf(buf + offset, size - offset,
3022 " State: %s\n",
3023 dpcm_state_string(be->dpcm[stream].state));
3024
3025 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3026 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3027 offset += snprintf(buf + offset, size - offset,
3028 " Hardware Params: "
3029 "Format = %s, Channels = %d, Rate = %d\n",
3030 snd_pcm_format_name(params_format(params)),
3031 params_channels(params),
3032 params_rate(params));
3033 }
a9764869 3034 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
f86dcef8
LG		 3035out:
3036 return offset;
3037}
3038
3039static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3040 size_t count, loff_t *ppos)
3041{
3042 struct snd_soc_pcm_runtime *fe = file->private_data;
3043 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
7083f877 3044 int stream;
f86dcef8
LG		 3045 char *buf;
3046
3047 buf = kmalloc(out_count, GFP_KERNEL);
3048 if (!buf)
3049 return -ENOMEM;
3050
7083f877
KM		 3051 for_each_pcm_streams(stream)
3052 if (snd_soc_dai_stream_valid(fe->cpu_dai, stream))
3053 offset += dpcm_show_state(fe, stream,
3054 buf + offset,
3055 out_count - offset);
f86dcef8 3056
f57b8488 3057 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
f86dcef8 3058
f57b8488
LG		 3059 kfree(buf);
3060 return ret;
f86dcef8
LG		 3061}
3062
3063static const struct file_operations dpcm_state_fops = {
f57b8488 3064 .open = simple_open,
f86dcef8
LG		 3065 .read = dpcm_state_read_file,
3066 .llseek = default_llseek,
3067};
3068
2e55b90a 3069void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
f86dcef8 3070{
b3bba9a1 3071 if (!rtd->dai_link)
2e55b90a 3072 return;
b3bba9a1 3073
596becd3
KM		 3074 if (!rtd->dai_link->dynamic)
3075 return;
3076
6553bf06
LPC		 3077 if (!rtd->card->debugfs_card_root)
3078 return;
b3bba9a1 3079
f86dcef8
LG		 3080 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3081 rtd->card->debugfs_card_root);
f86dcef8 3082
f1e3f409
FE		 3083 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3084 rtd, &dpcm_state_fops);
f86dcef8
LG		 3085}
3086#endif
Linux 6.x block layer and io_uring tree(s)