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ASoC: rt5677: Add a PCM device for streaming hotword via SPI
[linux-2.6-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
24894b76
LPC		 31/**
32 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
33 * @rtd: ASoC PCM runtime that is activated
34 * @stream: Direction of the PCM stream
35 *
36 * Increments the active count for all the DAIs and components attached to a PCM
37 * runtime. Should typically be called when a stream is opened.
38 *
72b745e3 39 * Must be called with the rtd->card->pcm_mutex being held
24894b76
LPC		 40 */
41void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
42{
43 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 44 struct snd_soc_dai *codec_dai;
2e5894d7 45 int i;
24894b76 46
72b745e3 47 lockdep_assert_held(&rtd->card->pcm_mutex);
24894b76
LPC		 48
49 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
50 cpu_dai->playback_active++;
0b7990e3
KM		 51 for_each_rtd_codec_dai(rtd, i, codec_dai)
52 codec_dai->playback_active++;
24894b76
LPC		 53 } else {
54 cpu_dai->capture_active++;
0b7990e3
KM		 55 for_each_rtd_codec_dai(rtd, i, codec_dai)
56 codec_dai->capture_active++;
24894b76
LPC		 57 }
58
59 cpu_dai->active++;
cdde4ccb 60 cpu_dai->component->active++;
0b7990e3
KM		 61 for_each_rtd_codec_dai(rtd, i, codec_dai) {
62 codec_dai->active++;
63 codec_dai->component->active++;
2e5894d7 64 }
24894b76
LPC		 65}
66
67/**
68 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
69 * @rtd: ASoC PCM runtime that is deactivated
70 * @stream: Direction of the PCM stream
71 *
72 * Decrements the active count for all the DAIs and components attached to a PCM
73 * runtime. Should typically be called when a stream is closed.
74 *
72b745e3 75 * Must be called with the rtd->card->pcm_mutex being held
24894b76
LPC		 76 */
77void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
78{
79 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 80 struct snd_soc_dai *codec_dai;
2e5894d7 81 int i;
24894b76 82
72b745e3 83 lockdep_assert_held(&rtd->card->pcm_mutex);
24894b76
LPC		 84
85 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
86 cpu_dai->playback_active--;
0b7990e3
KM		 87 for_each_rtd_codec_dai(rtd, i, codec_dai)
88 codec_dai->playback_active--;
24894b76
LPC		 89 } else {
90 cpu_dai->capture_active--;
0b7990e3
KM		 91 for_each_rtd_codec_dai(rtd, i, codec_dai)
92 codec_dai->capture_active--;
24894b76
LPC		 93 }
94
95 cpu_dai->active--;
cdde4ccb 96 cpu_dai->component->active--;
0b7990e3
KM		 97 for_each_rtd_codec_dai(rtd, i, codec_dai) {
98 codec_dai->component->active--;
99 codec_dai->active--;
2e5894d7 100 }
24894b76
LPC		 101}
102
208a1589
LPC		 103/**
104 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
105 * @rtd: The ASoC PCM runtime that should be checked.
106 *
107 * This function checks whether the power down delay should be ignored for a
108 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
109 * been configured to ignore the delay, or if none of the components benefits
110 * from having the delay.
111 */
112bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
113{
fbb16563
KM		 114 struct snd_soc_rtdcom_list *rtdcom;
115 struct snd_soc_component *component;
2e5894d7
BC		 116 bool ignore = true;
117
208a1589
LPC		 118 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
119 return true;
120
fbb16563
KM		 121 for_each_rtdcom(rtd, rtdcom) {
122 component = rtdcom->component;
123
72c38184 124 ignore &= !component->driver->use_pmdown_time;
fbb16563
KM		 125 }
126
fbb16563 127 return ignore;
208a1589
LPC		 128}
129
90996f43
LPC		 130/**
131 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
132 * @substream: the pcm substream
133 * @hw: the hardware parameters
134 *
135 * Sets the substream runtime hardware parameters.
136 */
137int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
138 const struct snd_pcm_hardware *hw)
139{
140 struct snd_pcm_runtime *runtime = substream->runtime;
141 runtime->hw.info = hw->info;
142 runtime->hw.formats = hw->formats;
143 runtime->hw.period_bytes_min = hw->period_bytes_min;
144 runtime->hw.period_bytes_max = hw->period_bytes_max;
145 runtime->hw.periods_min = hw->periods_min;
146 runtime->hw.periods_max = hw->periods_max;
147 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
148 runtime->hw.fifo_size = hw->fifo_size;
149 return 0;
150}
151EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
152
01d7584c 153/* DPCM stream event, send event to FE and all active BEs. */
23607025 154int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
01d7584c
LG		 155 int event)
156{
157 struct snd_soc_dpcm *dpcm;
158
8d6258a4 159 for_each_dpcm_be(fe, dir, dpcm) {
01d7584c
LG		 160
161 struct snd_soc_pcm_runtime *be = dpcm->be;
162
103d84a3 163 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
01d7584c
LG		 164 be->dai_link->name, event, dir);
165
b1cd2e34
BG		 166 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
167 (be->dpcm[dir].users >= 1))
168 continue;
169
01d7584c
LG		 170 snd_soc_dapm_stream_event(be, dir, event);
171 }
172
173 snd_soc_dapm_stream_event(fe, dir, event);
174
175 return 0;
176}
177
17841020
DA		 178static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
179 struct snd_soc_dai *soc_dai)
ddee627c
LG		 180{
181 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c
LG		 182 int ret;
183
3635bf09
NC		 184 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
185 rtd->dai_link->symmetric_rates)) {
186 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
187 soc_dai->rate);
188
4dcdd43b 189 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 190 SNDRV_PCM_HW_PARAM_RATE,
4dcdd43b 191 soc_dai->rate);
3635bf09
NC		 192 if (ret < 0) {
193 dev_err(soc_dai->dev,
194 "ASoC: Unable to apply rate constraint: %d\n",
195 ret);
196 return ret;
197 }
198 }
ddee627c 199
3635bf09
NC		 200 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
201 rtd->dai_link->symmetric_channels)) {
202 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
203 soc_dai->channels);
ddee627c 204
4dcdd43b 205 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 206 SNDRV_PCM_HW_PARAM_CHANNELS,
3635bf09
NC		 207 soc_dai->channels);
208 if (ret < 0) {
209 dev_err(soc_dai->dev,
210 "ASoC: Unable to apply channel symmetry constraint: %d\n",
211 ret);
212 return ret;
213 }
ddee627c
LG		 214 }
215
3635bf09
NC		 216 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
217 rtd->dai_link->symmetric_samplebits)) {
218 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
219 soc_dai->sample_bits);
ddee627c 220
4dcdd43b 221 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 222 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
3635bf09
NC		 223 soc_dai->sample_bits);
224 if (ret < 0) {
225 dev_err(soc_dai->dev,
226 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
227 ret);
228 return ret;
229 }
ddee627c
LG		 230 }
231
232 return 0;
233}
234
3635bf09
NC		 235static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
236 struct snd_pcm_hw_params *params)
237{
238 struct snd_soc_pcm_runtime *rtd = substream->private_data;
239 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 240 struct snd_soc_dai *codec_dai;
2e5894d7 241 unsigned int rate, channels, sample_bits, symmetry, i;
3635bf09
NC		 242
243 rate = params_rate(params);
244 channels = params_channels(params);
245 sample_bits = snd_pcm_format_physical_width(params_format(params));
246
247 /* reject unmatched parameters when applying symmetry */
248 symmetry = cpu_dai->driver->symmetric_rates ||
3635bf09 249 rtd->dai_link->symmetric_rates;
2e5894d7 250
0b7990e3
KM		 251 for_each_rtd_codec_dai(rtd, i, codec_dai)
252 symmetry |= codec_dai->driver->symmetric_rates;
2e5894d7 253
3635bf09
NC		 254 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
255 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
256 cpu_dai->rate, rate);
257 return -EINVAL;
ddee627c
LG		 258 }
259
3635bf09 260 symmetry = cpu_dai->driver->symmetric_channels ||
3635bf09 261 rtd->dai_link->symmetric_channels;
2e5894d7 262
0b7990e3
KM		 263 for_each_rtd_codec_dai(rtd, i, codec_dai)
264 symmetry |= codec_dai->driver->symmetric_channels;
2e5894d7 265
3635bf09
NC		 266 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
267 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
268 cpu_dai->channels, channels);
269 return -EINVAL;
270 }
ddee627c 271
3635bf09 272 symmetry = cpu_dai->driver->symmetric_samplebits ||
3635bf09 273 rtd->dai_link->symmetric_samplebits;
2e5894d7 274
0b7990e3
KM		 275 for_each_rtd_codec_dai(rtd, i, codec_dai)
276 symmetry |= codec_dai->driver->symmetric_samplebits;
2e5894d7 277
3635bf09
NC		 278 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
279 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
280 cpu_dai->sample_bits, sample_bits);
281 return -EINVAL;
ddee627c
LG		 282 }
283
284 return 0;
285}
286
62e5f676
LPC		 287static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
288{
289 struct snd_soc_pcm_runtime *rtd = substream->private_data;
290 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
62e5f676 291 struct snd_soc_dai_link *link = rtd->dai_link;
0b7990e3 292 struct snd_soc_dai *codec_dai;
2e5894d7 293 unsigned int symmetry, i;
62e5f676 294
2e5894d7
BC		 295 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
296 cpu_driver->symmetric_channels || link->symmetric_channels ||
297 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
62e5f676 298
0b7990e3 299 for_each_rtd_codec_dai(rtd, i, codec_dai)
2e5894d7 300 symmetry = symmetry ||
0b7990e3
KM		 301 codec_dai->driver->symmetric_rates ||
302 codec_dai->driver->symmetric_channels ||
303 codec_dai->driver->symmetric_samplebits;
2e5894d7
BC		 304
305 return symmetry;
62e5f676
LPC		 306}
307
2e5894d7 308static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
58ba9b25 309{
2e5894d7 310 struct snd_soc_pcm_runtime *rtd = substream->private_data;
c6068d3a 311 int ret;
58ba9b25
MB		 312
313 if (!bits)
314 return;
315
0e2a3751
LPC		 316 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
317 if (ret != 0)
318 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
319 bits, ret);
58ba9b25
MB		 320}
321
c8dd1fec
BC		 322static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
323{
324 struct snd_soc_pcm_runtime *rtd = substream->private_data;
325 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 326 struct snd_soc_dai *codec_dai;
327 int i;
c8dd1fec
BC		 328 unsigned int bits = 0, cpu_bits;
329
330 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
0b7990e3 331 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 332 if (codec_dai->driver->playback.sig_bits == 0) {
333 bits = 0;
334 break;
335 }
336 bits = max(codec_dai->driver->playback.sig_bits, bits);
337 }
c8dd1fec
BC		 338 cpu_bits = cpu_dai->driver->playback.sig_bits;
339 } else {
0b7990e3 340 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5e63dfcc 341 if (codec_dai->driver->capture.sig_bits == 0) {
2e5894d7
BC		 342 bits = 0;
343 break;
344 }
345 bits = max(codec_dai->driver->capture.sig_bits, bits);
346 }
c8dd1fec
BC		 347 cpu_bits = cpu_dai->driver->capture.sig_bits;
348 }
349
2e5894d7
BC		 350 soc_pcm_set_msb(substream, bits);
351 soc_pcm_set_msb(substream, cpu_bits);
c8dd1fec
BC		 352}
353
2e5894d7 354static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
bd477c31 355{
2e5894d7 356 struct snd_pcm_runtime *runtime = substream->runtime;
78e45c99 357 struct snd_pcm_hardware *hw = &runtime->hw;
2e5894d7 358 struct snd_soc_pcm_runtime *rtd = substream->private_data;
0b7990e3 359 struct snd_soc_dai *codec_dai;
2e5894d7
BC		 360 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
361 struct snd_soc_dai_driver *codec_dai_drv;
362 struct snd_soc_pcm_stream *codec_stream;
363 struct snd_soc_pcm_stream *cpu_stream;
364 unsigned int chan_min = 0, chan_max = UINT_MAX;
365 unsigned int rate_min = 0, rate_max = UINT_MAX;
366 unsigned int rates = UINT_MAX;
367 u64 formats = ULLONG_MAX;
368 int i;
78e45c99 369
2e5894d7
BC		 370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
371 cpu_stream = &cpu_dai_drv->playback;
16d7ea91 372 else
2e5894d7 373 cpu_stream = &cpu_dai_drv->capture;
78e45c99 374
2e5894d7 375 /* first calculate min/max only for CODECs in the DAI link */
0b7990e3 376 for_each_rtd_codec_dai(rtd, i, codec_dai) {
cde79035
RW		 377
378 /*
379 * Skip CODECs which don't support the current stream type.
380 * Otherwise, since the rate, channel, and format values will
381 * zero in that case, we would have no usable settings left,
382 * causing the resulting setup to fail.
383 * At least one CODEC should match, otherwise we should have
384 * bailed out on a higher level, since there would be no
385 * CODEC to support the transfer direction in that case.
386 */
0b7990e3 387 if (!snd_soc_dai_stream_valid(codec_dai,
cde79035
RW		 388 substream->stream))
389 continue;
390
0b7990e3 391 codec_dai_drv = codec_dai->driver;
2e5894d7
BC		 392 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
393 codec_stream = &codec_dai_drv->playback;
394 else
395 codec_stream = &codec_dai_drv->capture;
396 chan_min = max(chan_min, codec_stream->channels_min);
397 chan_max = min(chan_max, codec_stream->channels_max);
398 rate_min = max(rate_min, codec_stream->rate_min);
399 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
400 formats &= codec_stream->formats;
401 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
402 }
403
404 /*
405 * chan min/max cannot be enforced if there are multiple CODEC DAIs
406 * connected to a single CPU DAI, use CPU DAI's directly and let
407 * channel allocation be fixed up later
408 */
409 if (rtd->num_codecs > 1) {
410 chan_min = cpu_stream->channels_min;
411 chan_max = cpu_stream->channels_max;
412 }
413
414 hw->channels_min = max(chan_min, cpu_stream->channels_min);
415 hw->channels_max = min(chan_max, cpu_stream->channels_max);
416 if (hw->formats)
417 hw->formats &= formats & cpu_stream->formats;
418 else
419 hw->formats = formats & cpu_stream->formats;
420 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
78e45c99
LPC		 421
422 snd_pcm_limit_hw_rates(runtime);
423
424 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
2e5894d7 425 hw->rate_min = max(hw->rate_min, rate_min);
78e45c99 426 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
2e5894d7 427 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
bd477c31
LPC		 428}
429
e7ecfdb7
KM		 430static int soc_pcm_components_open(struct snd_pcm_substream *substream,
431 struct snd_soc_component **last)
432{
433 struct snd_soc_pcm_runtime *rtd = substream->private_data;
434 struct snd_soc_rtdcom_list *rtdcom;
435 struct snd_soc_component *component;
436 int ret = 0;
437
438 for_each_rtdcom(rtd, rtdcom) {
439 component = rtdcom->component;
440 *last = component;
441
4a81e8f3
KM		 442 ret = snd_soc_component_module_get_when_open(component);
443 if (ret < 0) {
e7ecfdb7
KM		 444 dev_err(component->dev,
445 "ASoC: can't get module %s\n",
446 component->name);
4a81e8f3 447 return ret;
e7ecfdb7
KM		 448 }
449
ae2f4849 450 ret = snd_soc_component_open(component, substream);
e7ecfdb7
KM		 451 if (ret < 0) {
452 dev_err(component->dev,
453 "ASoC: can't open component %s: %d\n",
454 component->name, ret);
455 return ret;
456 }
457 }
458 *last = NULL;
459 return 0;
460}
461
244e2936
CK		 462static int soc_pcm_components_close(struct snd_pcm_substream *substream,
463 struct snd_soc_component *last)
464{
465 struct snd_soc_pcm_runtime *rtd = substream->private_data;
466 struct snd_soc_rtdcom_list *rtdcom;
467 struct snd_soc_component *component;
3672beb8 468 int ret = 0;
244e2936
CK		 469
470 for_each_rtdcom(rtd, rtdcom) {
471 component = rtdcom->component;
472
473 if (component == last)
474 break;
475
3672beb8 476 ret |= snd_soc_component_close(component, substream);
4a81e8f3 477 snd_soc_component_module_put_when_close(component);
244e2936
CK		 478 }
479
3672beb8 480 return ret;
244e2936
CK		 481}
482
ddee627c
LG		 483/*
484 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
485 * then initialized and any private data can be allocated. This also calls
ef050bec 486 * startup for the cpu DAI, component, machine and codec DAI.
ddee627c
LG		 487 */
488static int soc_pcm_open(struct snd_pcm_substream *substream)
489{
490 struct snd_soc_pcm_runtime *rtd = substream->private_data;
491 struct snd_pcm_runtime *runtime = substream->runtime;
90be711e
KM		 492 struct snd_soc_component *component;
493 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 494 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 495 struct snd_soc_dai *codec_dai;
496 const char *codec_dai_name = "multicodec";
244e2936 497 int i, ret = 0;
ddee627c 498
988e8cc4 499 pinctrl_pm_select_default_state(cpu_dai->dev);
0b7990e3
KM		 500 for_each_rtd_codec_dai(rtd, i, codec_dai)
501 pinctrl_pm_select_default_state(codec_dai->dev);
90be711e
KM		 502
503 for_each_rtdcom(rtd, rtdcom) {
504 component = rtdcom->component;
505
506 pm_runtime_get_sync(component->dev);
507 }
d6652ef8 508
72b745e3 509 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c
LG		 510
511 /* startup the audio subsystem */
5a52a045
KM		 512 ret = snd_soc_dai_startup(cpu_dai, substream);
513 if (ret < 0) {
514 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
515 cpu_dai->name, ret);
516 goto out;
ddee627c
LG		 517 }
518
e7ecfdb7
KM		 519 ret = soc_pcm_components_open(substream, &component);
520 if (ret < 0)
521 goto component_err;
b8135864 522
0b7990e3 523 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5a52a045
KM		 524 ret = snd_soc_dai_startup(codec_dai, substream);
525 if (ret < 0) {
526 dev_err(codec_dai->dev,
527 "ASoC: can't open codec %s: %d\n",
528 codec_dai->name, ret);
529 goto codec_dai_err;
ddee627c 530 }
2e5894d7
BC		 531
532 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
533 codec_dai->tx_mask = 0;
534 else
535 codec_dai->rx_mask = 0;
ddee627c
LG		 536 }
537
75ab9eb6 538 if (rtd->dai_link->ops->startup) {
ddee627c
LG		 539 ret = rtd->dai_link->ops->startup(substream);
540 if (ret < 0) {
103d84a3 541 pr_err("ASoC: %s startup failed: %d\n",
25bfe662 542 rtd->dai_link->name, ret);
ddee627c
LG		 543 goto machine_err;
544 }
545 }
546
01d7584c
LG		 547 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
548 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
549 goto dynamic;
550
ddee627c 551 /* Check that the codec and cpu DAIs are compatible */
2e5894d7
BC		 552 soc_pcm_init_runtime_hw(substream);
553
554 if (rtd->num_codecs == 1)
555 codec_dai_name = rtd->codec_dai->name;
ddee627c 556
62e5f676
LPC		 557 if (soc_pcm_has_symmetry(substream))
558 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
559
ddee627c 560 ret = -EINVAL;
ddee627c 561 if (!runtime->hw.rates) {
103d84a3 562 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
2e5894d7 563 codec_dai_name, cpu_dai->name);
ddee627c
LG		 564 goto config_err;
565 }
566 if (!runtime->hw.formats) {
103d84a3 567 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
2e5894d7 568 codec_dai_name, cpu_dai->name);
ddee627c
LG		 569 goto config_err;
570 }
571 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
572 runtime->hw.channels_min > runtime->hw.channels_max) {
103d84a3 573 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
2e5894d7 574 codec_dai_name, cpu_dai->name);
ddee627c
LG		 575 goto config_err;
576 }
577
c8dd1fec 578 soc_pcm_apply_msb(substream);
58ba9b25 579
ddee627c 580 /* Symmetry only applies if we've already got an active stream. */
17841020
DA		 581 if (cpu_dai->active) {
582 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
583 if (ret != 0)
584 goto config_err;
585 }
586
0b7990e3
KM		 587 for_each_rtd_codec_dai(rtd, i, codec_dai) {
588 if (codec_dai->active) {
589 ret = soc_pcm_apply_symmetry(substream, codec_dai);
2e5894d7
BC		 590 if (ret != 0)
591 goto config_err;
592 }
ddee627c
LG		 593 }
594
103d84a3 595 pr_debug("ASoC: %s <-> %s info:\n",
2e5894d7 596 codec_dai_name, cpu_dai->name);
103d84a3
LG		 597 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
598 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
ddee627c 599 runtime->hw.channels_max);
103d84a3 600 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
ddee627c
LG		 601 runtime->hw.rate_max);
602
01d7584c 603dynamic:
24894b76
LPC		 604
605 snd_soc_runtime_activate(rtd, substream->stream);
606
72b745e3 607 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 608 return 0;
609
610config_err:
75ab9eb6 611 if (rtd->dai_link->ops->shutdown)
ddee627c
LG		 612 rtd->dai_link->ops->shutdown(substream);
613
614machine_err:
2e5894d7 615 i = rtd->num_codecs;
ddee627c
LG		 616
617codec_dai_err:
330fcb51
KM		 618 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
619 snd_soc_dai_shutdown(codec_dai, substream);
2e5894d7 620
b8135864 621component_err:
244e2936 622 soc_pcm_components_close(substream, component);
e7ecfdb7 623
330fcb51 624 snd_soc_dai_shutdown(cpu_dai, substream);
ddee627c 625out:
72b745e3 626 mutex_unlock(&rtd->card->pcm_mutex);
d6652ef8 627
90be711e
KM		 628 for_each_rtdcom(rtd, rtdcom) {
629 component = rtdcom->component;
630
631 pm_runtime_mark_last_busy(component->dev);
632 pm_runtime_put_autosuspend(component->dev);
3f809783
SK		 633 }
634
0b7990e3
KM		 635 for_each_rtd_codec_dai(rtd, i, codec_dai) {
636 if (!codec_dai->active)
637 pinctrl_pm_select_sleep_state(codec_dai->dev);
2e5894d7 638 }
988e8cc4
NC		 639 if (!cpu_dai->active)
640 pinctrl_pm_select_sleep_state(cpu_dai->dev);
d6652ef8 641
ddee627c
LG		 642 return ret;
643}
644
645/*
646 * Power down the audio subsystem pmdown_time msecs after close is called.
647 * This is to ensure there are no pops or clicks in between any music tracks
648 * due to DAPM power cycling.
649 */
650static void close_delayed_work(struct work_struct *work)
651{
652 struct snd_soc_pcm_runtime *rtd =
653 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
2e5894d7 654 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
ddee627c 655
72b745e3 656 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 657
103d84a3 658 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
ddee627c
LG		 659 codec_dai->driver->playback.stream_name,
660 codec_dai->playback_active ? "active" : "inactive",
9bffb1fb 661 rtd->pop_wait ? "yes" : "no");
ddee627c
LG		 662
663 /* are we waiting on this codec DAI stream */
9bffb1fb
MLC		 664 if (rtd->pop_wait == 1) {
665 rtd->pop_wait = 0;
7bd3a6f3 666 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
d9b0951b 667 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 668 }
669
72b745e3 670 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 671}
672
a342031c
JB		 673static void codec2codec_close_delayed_work(struct work_struct *work)
674{
675 /*
676 * Currently nothing to do for c2c links
677 * Since c2c links are internal nodes in the DAPM graph and
678 * don't interface with the outside world or application layer
679 * we don't have to do any special handling on close.
680 */
681}
682
ddee627c
LG		 683/*
684 * Called by ALSA when a PCM substream is closed. Private data can be
ef050bec 685 * freed here. The cpu DAI, codec DAI, machine and components are also
ddee627c
LG		 686 * shutdown.
687 */
91d5e6b4 688static int soc_pcm_close(struct snd_pcm_substream *substream)
ddee627c
LG		 689{
690 struct snd_soc_pcm_runtime *rtd = substream->private_data;
90be711e
KM		 691 struct snd_soc_component *component;
692 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 693 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 694 struct snd_soc_dai *codec_dai;
695 int i;
ddee627c 696
72b745e3 697 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 698
24894b76 699 snd_soc_runtime_deactivate(rtd, substream->stream);
ddee627c 700
17841020
DA		 701 /* clear the corresponding DAIs rate when inactive */
702 if (!cpu_dai->active)
703 cpu_dai->rate = 0;
704
0b7990e3 705 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 706 if (!codec_dai->active)
707 codec_dai->rate = 0;
708 }
25b76791 709
ae11601b
RB		 710 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
711
330fcb51 712 snd_soc_dai_shutdown(cpu_dai, substream);
ddee627c 713
330fcb51
KM		 714 for_each_rtd_codec_dai(rtd, i, codec_dai)
715 snd_soc_dai_shutdown(codec_dai, substream);
ddee627c 716
75ab9eb6 717 if (rtd->dai_link->ops->shutdown)
ddee627c
LG		 718 rtd->dai_link->ops->shutdown(substream);
719
244e2936 720 soc_pcm_components_close(substream, NULL);
b8135864 721
ddee627c 722 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
208a1589 723 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
1d69c5c5
PU		 724 /* powered down playback stream now */
725 snd_soc_dapm_stream_event(rtd,
7bd3a6f3 726 SNDRV_PCM_STREAM_PLAYBACK,
7bd3a6f3 727 SND_SOC_DAPM_STREAM_STOP);
1d69c5c5
PU		 728 } else {
729 /* start delayed pop wq here for playback streams */
9bffb1fb 730 rtd->pop_wait = 1;
d4e1a73a
MB		 731 queue_delayed_work(system_power_efficient_wq,
732 &rtd->delayed_work,
733 msecs_to_jiffies(rtd->pmdown_time));
1d69c5c5 734 }
ddee627c
LG		 735 } else {
736 /* capture streams can be powered down now */
7bd3a6f3 737 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
d9b0951b 738 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 739 }
740
72b745e3 741 mutex_unlock(&rtd->card->pcm_mutex);
d6652ef8 742
90be711e
KM		 743 for_each_rtdcom(rtd, rtdcom) {
744 component = rtdcom->component;
3f809783 745
90be711e
KM		 746 pm_runtime_mark_last_busy(component->dev);
747 pm_runtime_put_autosuspend(component->dev);
3f809783
SK		 748 }
749
0b7990e3
KM		 750 for_each_rtd_codec_dai(rtd, i, codec_dai) {
751 if (!codec_dai->active)
752 pinctrl_pm_select_sleep_state(codec_dai->dev);
2e5894d7 753 }
988e8cc4
NC		 754 if (!cpu_dai->active)
755 pinctrl_pm_select_sleep_state(cpu_dai->dev);
d6652ef8 756
ddee627c
LG		 757 return 0;
758}
759
760/*
761 * Called by ALSA when the PCM substream is prepared, can set format, sample
762 * rate, etc. This function is non atomic and can be called multiple times,
763 * it can refer to the runtime info.
764 */
765static int soc_pcm_prepare(struct snd_pcm_substream *substream)
766{
767 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 768 struct snd_soc_component *component;
769 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 770 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 771 struct snd_soc_dai *codec_dai;
772 int i, ret = 0;
ddee627c 773
72b745e3 774 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 775
75ab9eb6 776 if (rtd->dai_link->ops->prepare) {
ddee627c
LG		 777 ret = rtd->dai_link->ops->prepare(substream);
778 if (ret < 0) {
103d84a3
LG		 779 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
780 " %d\n", ret);
ddee627c
LG		 781 goto out;
782 }
783 }
784
b8135864
KM		 785 for_each_rtdcom(rtd, rtdcom) {
786 component = rtdcom->component;
787
6d537233 788 ret = snd_soc_component_prepare(component, substream);
b8135864
KM		 789 if (ret < 0) {
790 dev_err(component->dev,
791 "ASoC: platform prepare error: %d\n", ret);
792 goto out;
793 }
794 }
795
0b7990e3 796 for_each_rtd_codec_dai(rtd, i, codec_dai) {
4beb8e10 797 ret = snd_soc_dai_prepare(codec_dai, substream);
ddee627c 798 if (ret < 0) {
4beb8e10
KM		 799 dev_err(codec_dai->dev,
800 "ASoC: codec DAI prepare error: %d\n",
801 ret);
ddee627c
LG		 802 goto out;
803 }
804 }
805
4beb8e10
KM		 806 ret = snd_soc_dai_prepare(cpu_dai, substream);
807 if (ret < 0) {
808 dev_err(cpu_dai->dev,
809 "ASoC: cpu DAI prepare error: %d\n", ret);
810 goto out;
811 }
812
ddee627c
LG		 813 /* cancel any delayed stream shutdown that is pending */
814 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
9bffb1fb
MLC		 815 rtd->pop_wait) {
816 rtd->pop_wait = 0;
ddee627c
LG		 817 cancel_delayed_work(&rtd->delayed_work);
818 }
819
d9b0951b
LG		 820 snd_soc_dapm_stream_event(rtd, substream->stream,
821 SND_SOC_DAPM_STREAM_START);
ddee627c 822
0b7990e3
KM		 823 for_each_rtd_codec_dai(rtd, i, codec_dai)
824 snd_soc_dai_digital_mute(codec_dai, 0,
2e5894d7 825 substream->stream);
ae11601b 826 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
ddee627c
LG		 827
828out:
72b745e3 829 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 830 return ret;
831}
832
2e5894d7
BC		 833static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
834 unsigned int mask)
835{
836 struct snd_interval *interval;
837 int channels = hweight_long(mask);
838
839 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
840 interval->min = channels;
841 interval->max = channels;
842}
843
244e2936
CK		 844static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
845 struct snd_soc_component *last)
846{
847 struct snd_soc_pcm_runtime *rtd = substream->private_data;
848 struct snd_soc_rtdcom_list *rtdcom;
849 struct snd_soc_component *component;
eae7136a 850 int ret = 0;
244e2936
CK		 851
852 for_each_rtdcom(rtd, rtdcom) {
853 component = rtdcom->component;
854
855 if (component == last)
856 break;
857
eae7136a 858 ret |= snd_soc_component_hw_free(component, substream);
244e2936
CK		 859 }
860
eae7136a 861 return ret;
244e2936
CK		 862}
863
ddee627c
LG		 864/*
865 * Called by ALSA when the hardware params are set by application. This
866 * function can also be called multiple times and can allocate buffers
867 * (using snd_pcm_lib_* ). It's non-atomic.
868 */
869static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
870 struct snd_pcm_hw_params *params)
871{
872 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 873 struct snd_soc_component *component;
874 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 875 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 876 struct snd_soc_dai *codec_dai;
244e2936 877 int i, ret = 0;
ddee627c 878
72b745e3 879 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
75ab9eb6 880 if (rtd->dai_link->ops->hw_params) {
ddee627c
LG		 881 ret = rtd->dai_link->ops->hw_params(substream, params);
882 if (ret < 0) {
103d84a3
LG		 883 dev_err(rtd->card->dev, "ASoC: machine hw_params"
884 " failed: %d\n", ret);
ddee627c
LG		 885 goto out;
886 }
887 }
888
0b7990e3 889 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 890 struct snd_pcm_hw_params codec_params;
891
cde79035
RW		 892 /*
893 * Skip CODECs which don't support the current stream type,
894 * the idea being that if a CODEC is not used for the currently
895 * set up transfer direction, it should not need to be
896 * configured, especially since the configuration used might
897 * not even be supported by that CODEC. There may be cases
898 * however where a CODEC needs to be set up although it is
899 * actually not being used for the transfer, e.g. if a
900 * capture-only CODEC is acting as an LRCLK and/or BCLK master
901 * for the DAI link including a playback-only CODEC.
902 * If this becomes necessary, we will have to augment the
903 * machine driver setup with information on how to act, so
904 * we can do the right thing here.
905 */
906 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
907 continue;
908
2e5894d7
BC		 909 /* copy params for each codec */
910 codec_params = *params;
911
912 /* fixup params based on TDM slot masks */
570f18b6
RW		 913 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
914 codec_dai->tx_mask)
2e5894d7
BC		 915 soc_pcm_codec_params_fixup(&codec_params,
916 codec_dai->tx_mask);
570f18b6
RW		 917
918 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
919 codec_dai->rx_mask)
2e5894d7
BC		 920 soc_pcm_codec_params_fixup(&codec_params,
921 codec_dai->rx_mask);
922
aa6166c2
KM		 923 ret = snd_soc_dai_hw_params(codec_dai, substream,
924 &codec_params);
93e6958a 925 if(ret < 0)
ddee627c 926 goto codec_err;
ddee627c 927
2e5894d7
BC		 928 codec_dai->rate = params_rate(&codec_params);
929 codec_dai->channels = params_channels(&codec_params);
930 codec_dai->sample_bits = snd_pcm_format_physical_width(
931 params_format(&codec_params));
078a85f2
CK		 932
933 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
ddee627c
LG		 934 }
935
aa6166c2 936 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
93e6958a
BC		 937 if (ret < 0)
938 goto interface_err;
ddee627c 939
ca58221d
KM		 940 /* store the parameters for each DAIs */
941 cpu_dai->rate = params_rate(params);
942 cpu_dai->channels = params_channels(params);
943 cpu_dai->sample_bits =
944 snd_pcm_format_physical_width(params_format(params));
945
946 snd_soc_dapm_update_dai(substream, params, cpu_dai);
947
b8135864
KM		 948 for_each_rtdcom(rtd, rtdcom) {
949 component = rtdcom->component;
950
245c539a 951 ret = snd_soc_component_hw_params(component, substream, params);
244e2936 952 if (ret < 0) {
b8135864
KM		 953 dev_err(component->dev,
954 "ASoC: %s hw params failed: %d\n",
244e2936
CK		 955 component->name, ret);
956 goto component_err;
b8135864
KM		 957 }
958 }
244e2936 959 component = NULL;
b8135864 960
957ce0c6 961 ret = soc_pcm_params_symmetry(substream, params);
962 if (ret)
b8135864 963 goto component_err;
ddee627c 964out:
72b745e3 965 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 966 return ret;
967
b8135864 968component_err:
244e2936 969 soc_pcm_components_hw_free(substream, component);
b8135864 970
846faaed 971 snd_soc_dai_hw_free(cpu_dai, substream);
2371abdc 972 cpu_dai->rate = 0;
ddee627c
LG		 973
974interface_err:
2e5894d7 975 i = rtd->num_codecs;
ddee627c
LG		 976
977codec_err:
6d11b128 978 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
f47b9ad9
JB		 979 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
980 continue;
981
846faaed 982 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7
BC		 983 codec_dai->rate = 0;
984 }
985
75ab9eb6 986 if (rtd->dai_link->ops->hw_free)
ddee627c
LG		 987 rtd->dai_link->ops->hw_free(substream);
988
72b745e3 989 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 990 return ret;
991}
992
993/*
994 * Frees resources allocated by hw_params, can be called multiple times
995 */
996static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
997{
998 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 999 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 1000 struct snd_soc_dai *codec_dai;
7f62b6ee 1001 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
2e5894d7 1002 int i;
ddee627c 1003
72b745e3 1004 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 1005
d3383420
NC		 1006 /* clear the corresponding DAIs parameters when going to be inactive */
1007 if (cpu_dai->active == 1) {
1008 cpu_dai->rate = 0;
1009 cpu_dai->channels = 0;
1010 cpu_dai->sample_bits = 0;
1011 }
1012
0b7990e3 1013 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 1014 if (codec_dai->active == 1) {
1015 codec_dai->rate = 0;
1016 codec_dai->channels = 0;
1017 codec_dai->sample_bits = 0;
1018 }
d3383420
NC		 1019 }
1020
ddee627c 1021 /* apply codec digital mute */
0b7990e3
KM		 1022 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1023 if ((playback && codec_dai->playback_active == 1) ||
1024 (!playback && codec_dai->capture_active == 1))
1025 snd_soc_dai_digital_mute(codec_dai, 1,
2e5894d7
BC		 1026 substream->stream);
1027 }
ddee627c
LG		 1028
1029 /* free any machine hw params */
75ab9eb6 1030 if (rtd->dai_link->ops->hw_free)
ddee627c
LG		 1031 rtd->dai_link->ops->hw_free(substream);
1032
b8135864 1033 /* free any component resources */
244e2936 1034 soc_pcm_components_hw_free(substream, NULL);
b8135864 1035
ddee627c 1036 /* now free hw params for the DAIs */
0b7990e3 1037 for_each_rtd_codec_dai(rtd, i, codec_dai) {
f47b9ad9
JB		 1038 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1039 continue;
1040
846faaed 1041 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7 1042 }
ddee627c 1043
846faaed 1044 snd_soc_dai_hw_free(cpu_dai, substream);
ddee627c 1045
72b745e3 1046 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 1047 return 0;
1048}
1049
4378f1fb 1050static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
ddee627c
LG		 1051{
1052 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 1053 struct snd_soc_component *component;
1054 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 1055 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 1056 struct snd_soc_dai *codec_dai;
1057 int i, ret;
1058
4378f1fb
PU		 1059 if (rtd->dai_link->ops->trigger) {
1060 ret = rtd->dai_link->ops->trigger(substream, cmd);
95aef355
KM		 1061 if (ret < 0)
1062 return ret;
ddee627c
LG		 1063 }
1064
b8135864
KM		 1065 for_each_rtdcom(rtd, rtdcom) {
1066 component = rtdcom->component;
1067
5693d50c 1068 ret = snd_soc_component_trigger(component, substream, cmd);
b8135864
KM		 1069 if (ret < 0)
1070 return ret;
1071 }
1072
901e822b 1073 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
95aef355
KM		 1074 if (ret < 0)
1075 return ret;
4792b0db 1076
4378f1fb
PU		 1077 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1078 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1079 if (ret < 0)
1080 return ret;
1081 }
1082
1083 return 0;
1084}
1085
1086static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1087{
1088 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1089 struct snd_soc_component *component;
1090 struct snd_soc_rtdcom_list *rtdcom;
1091 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1092 struct snd_soc_dai *codec_dai;
1093 int i, ret;
1094
1095 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1096 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1097 if (ret < 0)
1098 return ret;
1099 }
1100
1101 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1102 if (ret < 0)
1103 return ret;
1104
1105 for_each_rtdcom(rtd, rtdcom) {
1106 component = rtdcom->component;
1107
1108 ret = snd_soc_component_trigger(component, substream, cmd);
1109 if (ret < 0)
1110 return ret;
1111 }
1112
75ab9eb6 1113 if (rtd->dai_link->ops->trigger) {
4792b0db
JN		 1114 ret = rtd->dai_link->ops->trigger(substream, cmd);
1115 if (ret < 0)
1116 return ret;
1117 }
1118
ddee627c
LG		 1119 return 0;
1120}
1121
4378f1fb
PU		 1122static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1123{
1124 int ret;
1125
1126 switch (cmd) {
1127 case SNDRV_PCM_TRIGGER_START:
1128 case SNDRV_PCM_TRIGGER_RESUME:
1129 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1130 ret = soc_pcm_trigger_start(substream, cmd);
1131 break;
1132 case SNDRV_PCM_TRIGGER_STOP:
1133 case SNDRV_PCM_TRIGGER_SUSPEND:
1134 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1135 ret = soc_pcm_trigger_stop(substream, cmd);
1136 break;
1137 default:
1138 return -EINVAL;
1139 }
1140
1141 return ret;
1142}
1143
45c0a188
MB		 1144static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1145 int cmd)
07bf84aa
LG		 1146{
1147 struct snd_soc_pcm_runtime *rtd = substream->private_data;
07bf84aa 1148 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 1149 struct snd_soc_dai *codec_dai;
1150 int i, ret;
1151
0b7990e3 1152 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5c0769af 1153 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
07bf84aa
LG		 1154 if (ret < 0)
1155 return ret;
1156 }
5c0769af 1157
901e822b 1158 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
5c0769af
KM		 1159 if (ret < 0)
1160 return ret;
1161
07bf84aa
LG		 1162 return 0;
1163}
ddee627c
LG		 1164/*
1165 * soc level wrapper for pointer callback
ef050bec 1166 * If cpu_dai, codec_dai, component driver has the delay callback, then
ddee627c
LG		 1167 * the runtime->delay will be updated accordingly.
1168 */
1169static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1170{
1171 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 1172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 1173 struct snd_soc_dai *codec_dai;
ddee627c
LG		 1174 struct snd_pcm_runtime *runtime = substream->runtime;
1175 snd_pcm_uframes_t offset = 0;
1176 snd_pcm_sframes_t delay = 0;
2e5894d7
BC		 1177 snd_pcm_sframes_t codec_delay = 0;
1178 int i;
ddee627c 1179
9fb4c2bf
AA		 1180 /* clearing the previous total delay */
1181 runtime->delay = 0;
1182
0035e256 1183 offset = snd_soc_pcm_component_pointer(substream);
b8135864 1184
9fb4c2bf
AA		 1185 /* base delay if assigned in pointer callback */
1186 delay = runtime->delay;
b8135864 1187
1dea80d4 1188 delay += snd_soc_dai_delay(cpu_dai, substream);
ddee627c 1189
0b7990e3 1190 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1dea80d4
KM		 1191 codec_delay = max(codec_delay,
1192 snd_soc_dai_delay(codec_dai, substream));
2e5894d7
BC		 1193 }
1194 delay += codec_delay;
ddee627c 1195
ddee627c
LG		 1196 runtime->delay = delay;
1197
1198 return offset;
1199}
1200
01d7584c
LG		 1201/* connect a FE and BE */
1202static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1203 struct snd_soc_pcm_runtime *be, int stream)
1204{
1205 struct snd_soc_dpcm *dpcm;
a9764869 1206 unsigned long flags;
01d7584c
LG		 1207
1208 /* only add new dpcms */
8d6258a4 1209 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1210 if (dpcm->be == be && dpcm->fe == fe)
1211 return 0;
1212 }
1213
1214 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1215 if (!dpcm)
1216 return -ENOMEM;
1217
1218 dpcm->be = be;
1219 dpcm->fe = fe;
1220 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1221 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
a9764869 1222 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1223 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1224 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
a9764869 1225 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c 1226
7cc302d2 1227 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
01d7584c
LG		 1228 stream ? "capture" : "playback", fe->dai_link->name,
1229 stream ? "<-" : "->", be->dai_link->name);
1230
f86dcef8 1231#ifdef CONFIG_DEBUG_FS
fee531d6
GKH		 1232 dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1233 fe->debugfs_dpcm_root);
1234 debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
f86dcef8 1235#endif
01d7584c
LG		 1236 return 1;
1237}
1238
1239/* reparent a BE onto another FE */
1240static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1241 struct snd_soc_pcm_runtime *be, int stream)
1242{
1243 struct snd_soc_dpcm *dpcm;
1244 struct snd_pcm_substream *fe_substream, *be_substream;
1245
1246 /* reparent if BE is connected to other FEs */
1247 if (!be->dpcm[stream].users)
1248 return;
1249
1250 be_substream = snd_soc_dpcm_get_substream(be, stream);
1251
d2e24d64 1252 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 1253 if (dpcm->fe == fe)
1254 continue;
1255
7cc302d2 1256 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
01d7584c
LG		 1257 stream ? "capture" : "playback",
1258 dpcm->fe->dai_link->name,
1259 stream ? "<-" : "->", dpcm->be->dai_link->name);
1260
1261 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1262 be_substream->runtime = fe_substream->runtime;
1263 break;
1264 }
1265}
1266
1267/* disconnect a BE and FE */
23607025 1268void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1269{
1270 struct snd_soc_dpcm *dpcm, *d;
a9764869 1271 unsigned long flags;
01d7584c 1272
8d6258a4 1273 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
103d84a3 1274 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
01d7584c
LG		 1275 stream ? "capture" : "playback",
1276 dpcm->be->dai_link->name);
1277
1278 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1279 continue;
1280
7cc302d2 1281 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
01d7584c
LG		 1282 stream ? "capture" : "playback", fe->dai_link->name,
1283 stream ? "<-" : "->", dpcm->be->dai_link->name);
1284
1285 /* BEs still alive need new FE */
1286 dpcm_be_reparent(fe, dpcm->be, stream);
1287
f86dcef8 1288#ifdef CONFIG_DEBUG_FS
fee531d6 1289 debugfs_remove_recursive(dpcm->debugfs_state);
f86dcef8 1290#endif
a9764869 1291 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1292 list_del(&dpcm->list_be);
1293 list_del(&dpcm->list_fe);
a9764869 1294 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1295 kfree(dpcm);
1296 }
1297}
1298
1299/* get BE for DAI widget and stream */
1300static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1301 struct snd_soc_dapm_widget *widget, int stream)
1302{
1303 struct snd_soc_pcm_runtime *be;
7afecb30 1304 struct snd_soc_dai *dai;
1a497983 1305 int i;
01d7584c 1306
3c146465
LG		 1307 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1308
01d7584c 1309 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
bcb1fd1f 1310 for_each_card_rtds(card, be) {
01d7584c 1311
35ea0655
LG		 1312 if (!be->dai_link->no_pcm)
1313 continue;
1314
3c146465
LG		 1315 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1316 be->cpu_dai->playback_widget ?
1317 be->cpu_dai->playback_widget->name : "(not set)");
1318
2e5894d7 1319 if (be->cpu_dai->playback_widget == widget)
01d7584c 1320 return be;
2e5894d7 1321
7afecb30 1322 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 1323 if (dai->playback_widget == widget)
1324 return be;
1325 }
01d7584c
LG		 1326 }
1327 } else {
1328
bcb1fd1f 1329 for_each_card_rtds(card, be) {
01d7584c 1330
35ea0655
LG		 1331 if (!be->dai_link->no_pcm)
1332 continue;
1333
3c146465
LG		 1334 dev_dbg(card->dev, "ASoC: try BE %s\n",
1335 be->cpu_dai->capture_widget ?
1336 be->cpu_dai->capture_widget->name : "(not set)");
1337
2e5894d7 1338 if (be->cpu_dai->capture_widget == widget)
01d7584c 1339 return be;
2e5894d7 1340
7afecb30 1341 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 1342 if (dai->capture_widget == widget)
1343 return be;
1344 }
01d7584c
LG		 1345 }
1346 }
1347
3c146465 1348 /* dai link name and stream name set correctly ? */
103d84a3 1349 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
01d7584c
LG		 1350 stream ? "capture" : "playback", widget->name);
1351 return NULL;
1352}
1353
1354static inline struct snd_soc_dapm_widget *
37018610 1355 dai_get_widget(struct snd_soc_dai *dai, int stream)
01d7584c
LG		 1356{
1357 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
37018610 1358 return dai->playback_widget;
01d7584c 1359 else
37018610 1360 return dai->capture_widget;
01d7584c
LG		 1361}
1362
1363static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1364 struct snd_soc_dapm_widget *widget)
1365{
1366 int i;
1367
1368 for (i = 0; i < list->num_widgets; i++) {
1369 if (widget == list->widgets[i])
1370 return 1;
1371 }
1372
1373 return 0;
1374}
1375
5fdd022c
PS		 1376static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1377 enum snd_soc_dapm_direction dir)
1378{
1379 struct snd_soc_card *card = widget->dapm->card;
1380 struct snd_soc_pcm_runtime *rtd;
0b7990e3 1381 struct snd_soc_dai *dai;
5fdd022c
PS		 1382 int i;
1383
1384 if (dir == SND_SOC_DAPM_DIR_OUT) {
bcb1fd1f 1385 for_each_card_rtds(card, rtd) {
5fdd022c
PS		 1386 if (!rtd->dai_link->no_pcm)
1387 continue;
1388
1389 if (rtd->cpu_dai->playback_widget == widget)
1390 return true;
1391
0b7990e3 1392 for_each_rtd_codec_dai(rtd, i, dai) {
5fdd022c
PS		 1393 if (dai->playback_widget == widget)
1394 return true;
1395 }
1396 }
1397 } else { /* SND_SOC_DAPM_DIR_IN */
bcb1fd1f 1398 for_each_card_rtds(card, rtd) {
5fdd022c
PS		 1399 if (!rtd->dai_link->no_pcm)
1400 continue;
1401
1402 if (rtd->cpu_dai->capture_widget == widget)
1403 return true;
1404
0b7990e3 1405 for_each_rtd_codec_dai(rtd, i, dai) {
5fdd022c
PS		 1406 if (dai->capture_widget == widget)
1407 return true;
1408 }
1409 }
1410 }
1411
1412 return false;
1413}
1414
23607025 1415int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1ce43acf 1416 int stream, struct snd_soc_dapm_widget_list **list)
01d7584c
LG		 1417{
1418 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
01d7584c
LG		 1419 int paths;
1420
01d7584c 1421 /* get number of valid DAI paths and their widgets */
6742064a 1422 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
5fdd022c 1423 dpcm_end_walk_at_be);
01d7584c 1424
103d84a3 1425 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
01d7584c
LG		 1426 stream ? "capture" : "playback");
1427
01d7584c
LG		 1428 return paths;
1429}
1430
01d7584c
LG		 1431static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1432 struct snd_soc_dapm_widget_list **list_)
1433{
1434 struct snd_soc_dpcm *dpcm;
1435 struct snd_soc_dapm_widget_list *list = *list_;
1436 struct snd_soc_dapm_widget *widget;
7afecb30 1437 struct snd_soc_dai *dai;
01d7584c
LG		 1438 int prune = 0;
1439
1440 /* Destroy any old FE <--> BE connections */
8d6258a4 1441 for_each_dpcm_be(fe, stream, dpcm) {
2e5894d7 1442 unsigned int i;
01d7584c
LG		 1443
1444 /* is there a valid CPU DAI widget for this BE */
37018610 1445 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
01d7584c
LG		 1446
1447 /* prune the BE if it's no longer in our active list */
1448 if (widget && widget_in_list(list, widget))
1449 continue;
1450
1451 /* is there a valid CODEC DAI widget for this BE */
7afecb30 1452 for_each_rtd_codec_dai(dpcm->be, i, dai) {
2e5894d7 1453 widget = dai_get_widget(dai, stream);
01d7584c 1454
2e5894d7
BC		 1455 /* prune the BE if it's no longer in our active list */
1456 if (widget && widget_in_list(list, widget))
1457 continue;
1458 }
01d7584c 1459
103d84a3 1460 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
01d7584c
LG		 1461 stream ? "capture" : "playback",
1462 dpcm->be->dai_link->name, fe->dai_link->name);
1463 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1464 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1465 prune++;
1466 }
1467
103d84a3 1468 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
01d7584c
LG		 1469 return prune;
1470}
1471
1472static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1473 struct snd_soc_dapm_widget_list **list_)
1474{
1475 struct snd_soc_card *card = fe->card;
1476 struct snd_soc_dapm_widget_list *list = *list_;
1477 struct snd_soc_pcm_runtime *be;
1478 int i, new = 0, err;
1479
1480 /* Create any new FE <--> BE connections */
1481 for (i = 0; i < list->num_widgets; i++) {
1482
4616274d
MB		 1483 switch (list->widgets[i]->id) {
1484 case snd_soc_dapm_dai_in:
c5b8540d
KC		 1485 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1486 continue;
1487 break;
4616274d 1488 case snd_soc_dapm_dai_out:
c5b8540d
KC		 1489 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1490 continue;
4616274d
MB		 1491 break;
1492 default:
01d7584c 1493 continue;
4616274d 1494 }
01d7584c
LG		 1495
1496 /* is there a valid BE rtd for this widget */
1497 be = dpcm_get_be(card, list->widgets[i], stream);
1498 if (!be) {
103d84a3 1499 dev_err(fe->dev, "ASoC: no BE found for %s\n",
01d7584c
LG		 1500 list->widgets[i]->name);
1501 continue;
1502 }
1503
1504 /* make sure BE is a real BE */
1505 if (!be->dai_link->no_pcm)
1506 continue;
1507
1508 /* don't connect if FE is not running */
23607025 1509 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
01d7584c
LG		 1510 continue;
1511
1512 /* newly connected FE and BE */
1513 err = dpcm_be_connect(fe, be, stream);
1514 if (err < 0) {
103d84a3 1515 dev_err(fe->dev, "ASoC: can't connect %s\n",
01d7584c
LG		 1516 list->widgets[i]->name);
1517 break;
1518 } else if (err == 0) /* already connected */
1519 continue;
1520
1521 /* new */
1522 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1523 new++;
1524 }
1525
103d84a3 1526 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
01d7584c
LG		 1527 return new;
1528}
1529
1530/*
1531 * Find the corresponding BE DAIs that source or sink audio to this
1532 * FE substream.
1533 */
23607025 1534int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
01d7584c
LG		 1535 int stream, struct snd_soc_dapm_widget_list **list, int new)
1536{
1537 if (new)
1538 return dpcm_add_paths(fe, stream, list);
1539 else
1540 return dpcm_prune_paths(fe, stream, list);
1541}
1542
23607025 1543void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1544{
1545 struct snd_soc_dpcm *dpcm;
a9764869 1546 unsigned long flags;
01d7584c 1547
a9764869 1548 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 1549 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 1550 dpcm->be->dpcm[stream].runtime_update =
1551 SND_SOC_DPCM_UPDATE_NO;
a9764869 1552 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1553}
1554
1555static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1556 int stream)
1557{
1558 struct snd_soc_dpcm *dpcm;
1559
1560 /* disable any enabled and non active backends */
8d6258a4 1561 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1562
1563 struct snd_soc_pcm_runtime *be = dpcm->be;
1564 struct snd_pcm_substream *be_substream =
1565 snd_soc_dpcm_get_substream(be, stream);
1566
1567 if (be->dpcm[stream].users == 0)
103d84a3 1568 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1569 stream ? "capture" : "playback",
1570 be->dpcm[stream].state);
1571
1572 if (--be->dpcm[stream].users != 0)
1573 continue;
1574
1575 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1576 continue;
1577
1578 soc_pcm_close(be_substream);
1579 be_substream->runtime = NULL;
1580 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1581 }
1582}
1583
23607025 1584int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1585{
1586 struct snd_soc_dpcm *dpcm;
1587 int err, count = 0;
1588
1589 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
8d6258a4 1590 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1591
1592 struct snd_soc_pcm_runtime *be = dpcm->be;
1593 struct snd_pcm_substream *be_substream =
1594 snd_soc_dpcm_get_substream(be, stream);
1595
2062b4c5
RKAL		 1596 if (!be_substream) {
1597 dev_err(be->dev, "ASoC: no backend %s stream\n",
1598 stream ? "capture" : "playback");
1599 continue;
1600 }
1601
01d7584c
LG		 1602 /* is this op for this BE ? */
1603 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1604 continue;
1605
1606 /* first time the dpcm is open ? */
1607 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
103d84a3 1608 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
01d7584c
LG		 1609 stream ? "capture" : "playback",
1610 be->dpcm[stream].state);
1611
1612 if (be->dpcm[stream].users++ != 0)
1613 continue;
1614
1615 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1616 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1617 continue;
1618
2062b4c5
RKAL		 1619 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1620 stream ? "capture" : "playback", be->dai_link->name);
01d7584c
LG		 1621
1622 be_substream->runtime = be->dpcm[stream].runtime;
1623 err = soc_pcm_open(be_substream);
1624 if (err < 0) {
103d84a3 1625 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
01d7584c
LG		 1626 be->dpcm[stream].users--;
1627 if (be->dpcm[stream].users < 0)
103d84a3 1628 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
01d7584c
LG		 1629 stream ? "capture" : "playback",
1630 be->dpcm[stream].state);
1631
1632 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1633 goto unwind;
1634 }
1635
1636 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1637 count++;
1638 }
1639
1640 return count;
1641
1642unwind:
1643 /* disable any enabled and non active backends */
8d6258a4 1644 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 1645 struct snd_soc_pcm_runtime *be = dpcm->be;
1646 struct snd_pcm_substream *be_substream =
1647 snd_soc_dpcm_get_substream(be, stream);
1648
1649 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1650 continue;
1651
1652 if (be->dpcm[stream].users == 0)
103d84a3 1653 dev_err(be->dev, "ASoC: no users %s at close %d\n",
01d7584c
LG		 1654 stream ? "capture" : "playback",
1655 be->dpcm[stream].state);
1656
1657 if (--be->dpcm[stream].users != 0)
1658 continue;
1659
1660 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1661 continue;
1662
1663 soc_pcm_close(be_substream);
1664 be_substream->runtime = NULL;
1665 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1666 }
1667
1668 return err;
1669}
1670
08ae9b45 1671static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
435ffb76 1672 struct snd_soc_pcm_stream *stream)
08ae9b45
LPC		 1673{
1674 runtime->hw.rate_min = stream->rate_min;
e33ffbd9 1675 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
08ae9b45
LPC		 1676 runtime->hw.channels_min = stream->channels_min;
1677 runtime->hw.channels_max = stream->channels_max;
002220a9 1678 if (runtime->hw.formats)
435ffb76 1679 runtime->hw.formats &= stream->formats;
002220a9 1680 else
435ffb76 1681 runtime->hw.formats = stream->formats;
08ae9b45
LPC		 1682 runtime->hw.rates = stream->rates;
1683}
1684
435ffb76
JB		 1685static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1686 u64 *formats)
b073ed4e
KM		 1687{
1688 struct snd_soc_pcm_runtime *fe = substream->private_data;
1689 struct snd_soc_dpcm *dpcm;
7afecb30 1690 struct snd_soc_dai *dai;
b073ed4e
KM		 1691 int stream = substream->stream;
1692
1693 if (!fe->dai_link->dpcm_merged_format)
435ffb76 1694 return;
b073ed4e
KM		 1695
1696 /*
1697 * It returns merged BE codec format
1698 * if FE want to use it (= dpcm_merged_format)
1699 */
1700
8d6258a4 1701 for_each_dpcm_be(fe, stream, dpcm) {
b073ed4e
KM		 1702 struct snd_soc_pcm_runtime *be = dpcm->be;
1703 struct snd_soc_dai_driver *codec_dai_drv;
1704 struct snd_soc_pcm_stream *codec_stream;
1705 int i;
1706
7afecb30 1707 for_each_rtd_codec_dai(be, i, dai) {
4febced1
JB		 1708 /*
1709 * Skip CODECs which don't support the current stream
1710 * type. See soc_pcm_init_runtime_hw() for more details
1711 */
7afecb30 1712 if (!snd_soc_dai_stream_valid(dai, stream))
4febced1
JB		 1713 continue;
1714
7afecb30 1715 codec_dai_drv = dai->driver;
b073ed4e
KM		 1716 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1717 codec_stream = &codec_dai_drv->playback;
1718 else
1719 codec_stream = &codec_dai_drv->capture;
1720
435ffb76 1721 *formats &= codec_stream->formats;
b073ed4e
KM		 1722 }
1723 }
b073ed4e
KM		 1724}
1725
435ffb76
JB		 1726static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1727 unsigned int *channels_min,
1728 unsigned int *channels_max)
f4c277b8
JW		 1729{
1730 struct snd_soc_pcm_runtime *fe = substream->private_data;
1731 struct snd_soc_dpcm *dpcm;
1732 int stream = substream->stream;
1733
1734 if (!fe->dai_link->dpcm_merged_chan)
1735 return;
1736
f4c277b8
JW		 1737 /*
1738 * It returns merged BE codec channel;
1739 * if FE want to use it (= dpcm_merged_chan)
1740 */
1741
8d6258a4 1742 for_each_dpcm_be(fe, stream, dpcm) {
f4c277b8 1743 struct snd_soc_pcm_runtime *be = dpcm->be;
4f2bd18b 1744 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
f4c277b8
JW		 1745 struct snd_soc_dai_driver *codec_dai_drv;
1746 struct snd_soc_pcm_stream *codec_stream;
4f2bd18b
JB		 1747 struct snd_soc_pcm_stream *cpu_stream;
1748
1749 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1750 cpu_stream = &cpu_dai_drv->playback;
1751 else
1752 cpu_stream = &cpu_dai_drv->capture;
1753
1754 *channels_min = max(*channels_min, cpu_stream->channels_min);
1755 *channels_max = min(*channels_max, cpu_stream->channels_max);
1756
1757 /*
1758 * chan min/max cannot be enforced if there are multiple CODEC
1759 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1760 */
1761 if (be->num_codecs == 1) {
1762 codec_dai_drv = be->codec_dais[0]->driver;
f4c277b8 1763
f4c277b8
JW		 1764 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1765 codec_stream = &codec_dai_drv->playback;
1766 else
1767 codec_stream = &codec_dai_drv->capture;
1768
1769 *channels_min = max(*channels_min,
1770 codec_stream->channels_min);
1771 *channels_max = min(*channels_max,
1772 codec_stream->channels_max);
1773 }
1774 }
1775}
1776
baacd8d1
JB		 1777static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1778 unsigned int *rates,
1779 unsigned int *rate_min,
1780 unsigned int *rate_max)
1781{
1782 struct snd_soc_pcm_runtime *fe = substream->private_data;
1783 struct snd_soc_dpcm *dpcm;
1784 int stream = substream->stream;
1785
1786 if (!fe->dai_link->dpcm_merged_rate)
1787 return;
1788
1789 /*
1790 * It returns merged BE codec channel;
1791 * if FE want to use it (= dpcm_merged_chan)
1792 */
1793
8d6258a4 1794 for_each_dpcm_be(fe, stream, dpcm) {
baacd8d1
JB		 1795 struct snd_soc_pcm_runtime *be = dpcm->be;
1796 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1797 struct snd_soc_dai_driver *codec_dai_drv;
1798 struct snd_soc_pcm_stream *codec_stream;
1799 struct snd_soc_pcm_stream *cpu_stream;
7afecb30 1800 struct snd_soc_dai *dai;
baacd8d1
JB		 1801 int i;
1802
1803 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1804 cpu_stream = &cpu_dai_drv->playback;
1805 else
1806 cpu_stream = &cpu_dai_drv->capture;
1807
1808 *rate_min = max(*rate_min, cpu_stream->rate_min);
1809 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1810 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1811
7afecb30 1812 for_each_rtd_codec_dai(be, i, dai) {
baacd8d1
JB		 1813 /*
1814 * Skip CODECs which don't support the current stream
1815 * type. See soc_pcm_init_runtime_hw() for more details
1816 */
7afecb30 1817 if (!snd_soc_dai_stream_valid(dai, stream))
baacd8d1
JB		 1818 continue;
1819
7afecb30 1820 codec_dai_drv = dai->driver;
baacd8d1
JB		 1821 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1822 codec_stream = &codec_dai_drv->playback;
1823 else
1824 codec_stream = &codec_dai_drv->capture;
1825
1826 *rate_min = max(*rate_min, codec_stream->rate_min);
1827 *rate_max = min_not_zero(*rate_max,
1828 codec_stream->rate_max);
1829 *rates = snd_pcm_rate_mask_intersect(*rates,
1830 codec_stream->rates);
1831 }
1832 }
1833}
1834
45c0a188 1835static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
01d7584c
LG		 1836{
1837 struct snd_pcm_runtime *runtime = substream->runtime;
1838 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1839 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1840 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1841
08ae9b45 1842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435ffb76 1843 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
08ae9b45 1844 else
435ffb76 1845 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
f4c277b8 1846
435ffb76
JB		 1847 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1848 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1849 &runtime->hw.channels_max);
baacd8d1
JB		 1850 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1851 &runtime->hw.rate_min, &runtime->hw.rate_max);
01d7584c
LG		 1852}
1853
ea9d0d77
TI		 1854static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1855
1856/* Set FE's runtime_update state; the state is protected via PCM stream lock
1857 * for avoiding the race with trigger callback.
1858 * If the state is unset and a trigger is pending while the previous operation,
1859 * process the pending trigger action here.
1860 */
1861static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1862 int stream, enum snd_soc_dpcm_update state)
1863{
1864 struct snd_pcm_substream *substream =
1865 snd_soc_dpcm_get_substream(fe, stream);
1866
1867 snd_pcm_stream_lock_irq(substream);
1868 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1869 dpcm_fe_dai_do_trigger(substream,
1870 fe->dpcm[stream].trigger_pending - 1);
1871 fe->dpcm[stream].trigger_pending = 0;
1872 }
1873 fe->dpcm[stream].runtime_update = state;
1874 snd_pcm_stream_unlock_irq(substream);
1875}
1876
906c7d69
PL		 1877static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1878 int stream)
1879{
1880 struct snd_soc_dpcm *dpcm;
1881 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1882 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1883 int err;
1884
1885 /* apply symmetry for FE */
1886 if (soc_pcm_has_symmetry(fe_substream))
1887 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1888
1889 /* Symmetry only applies if we've got an active stream. */
1890 if (fe_cpu_dai->active) {
1891 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1892 if (err < 0)
1893 return err;
1894 }
1895
1896 /* apply symmetry for BE */
8d6258a4 1897 for_each_dpcm_be(fe, stream, dpcm) {
906c7d69
PL		 1898 struct snd_soc_pcm_runtime *be = dpcm->be;
1899 struct snd_pcm_substream *be_substream =
1900 snd_soc_dpcm_get_substream(be, stream);
6246f283 1901 struct snd_soc_pcm_runtime *rtd;
0b7990e3 1902 struct snd_soc_dai *codec_dai;
906c7d69
PL		 1903 int i;
1904
6246f283
JB		 1905 /* A backend may not have the requested substream */
1906 if (!be_substream)
1907 continue;
1908
1909 rtd = be_substream->private_data;
f1176614
JK		 1910 if (rtd->dai_link->be_hw_params_fixup)
1911 continue;
1912
906c7d69
PL		 1913 if (soc_pcm_has_symmetry(be_substream))
1914 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1915
1916 /* Symmetry only applies if we've got an active stream. */
1917 if (rtd->cpu_dai->active) {
99bcedbd
KCC		 1918 err = soc_pcm_apply_symmetry(fe_substream,
1919 rtd->cpu_dai);
906c7d69
PL		 1920 if (err < 0)
1921 return err;
1922 }
1923
0b7990e3
KM		 1924 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1925 if (codec_dai->active) {
99bcedbd 1926 err = soc_pcm_apply_symmetry(fe_substream,
0b7990e3 1927 codec_dai);
906c7d69
PL		 1928 if (err < 0)
1929 return err;
1930 }
1931 }
1932 }
1933
1934 return 0;
1935}
1936
01d7584c
LG		 1937static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1938{
1939 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1940 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1941 int stream = fe_substream->stream, ret = 0;
1942
ea9d0d77 1943 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1944
1945 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1946 if (ret < 0) {
103d84a3 1947 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
01d7584c
LG		 1948 goto be_err;
1949 }
1950
103d84a3 1951 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
01d7584c
LG		 1952
1953 /* start the DAI frontend */
1954 ret = soc_pcm_open(fe_substream);
1955 if (ret < 0) {
103d84a3 1956 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
01d7584c
LG		 1957 goto unwind;
1958 }
1959
1960 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1961
1962 dpcm_set_fe_runtime(fe_substream);
1963 snd_pcm_limit_hw_rates(runtime);
1964
906c7d69
PL		 1965 ret = dpcm_apply_symmetry(fe_substream, stream);
1966 if (ret < 0) {
1967 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1968 ret);
1969 goto unwind;
1970 }
1971
ea9d0d77 1972 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1973 return 0;
1974
1975unwind:
1976 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1977be_err:
ea9d0d77 1978 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1979 return ret;
1980}
1981
23607025 1982int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1983{
1984 struct snd_soc_dpcm *dpcm;
1985
1986 /* only shutdown BEs that are either sinks or sources to this FE DAI */
8d6258a4 1987 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1988
1989 struct snd_soc_pcm_runtime *be = dpcm->be;
1990 struct snd_pcm_substream *be_substream =
1991 snd_soc_dpcm_get_substream(be, stream);
1992
1993 /* is this op for this BE ? */
1994 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1995 continue;
1996
1997 if (be->dpcm[stream].users == 0)
103d84a3 1998 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1999 stream ? "capture" : "playback",
2000 be->dpcm[stream].state);
2001
2002 if (--be->dpcm[stream].users != 0)
2003 continue;
2004
2005 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
9c0ac70a
KCC		 2006 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2007 soc_pcm_hw_free(be_substream);
2008 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2009 }
01d7584c 2010
103d84a3 2011 dev_dbg(be->dev, "ASoC: close BE %s\n",
94d215cc 2012 be->dai_link->name);
01d7584c
LG		 2013
2014 soc_pcm_close(be_substream);
2015 be_substream->runtime = NULL;
2016
2017 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2018 }
2019 return 0;
2020}
2021
2022static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2023{
2024 struct snd_soc_pcm_runtime *fe = substream->private_data;
2025 int stream = substream->stream;
2026
ea9d0d77 2027 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2028
2029 /* shutdown the BEs */
2030 dpcm_be_dai_shutdown(fe, substream->stream);
2031
103d84a3 2032 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
01d7584c
LG		 2033
2034 /* now shutdown the frontend */
2035 soc_pcm_close(substream);
2036
2037 /* run the stream event for each BE */
2038 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2039
2040 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
ea9d0d77 2041 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2042 return 0;
2043}
2044
23607025 2045int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2046{
2047 struct snd_soc_dpcm *dpcm;
2048
2049 /* only hw_params backends that are either sinks or sources
2050 * to this frontend DAI */
8d6258a4 2051 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2052
2053 struct snd_soc_pcm_runtime *be = dpcm->be;
2054 struct snd_pcm_substream *be_substream =
2055 snd_soc_dpcm_get_substream(be, stream);
2056
2057 /* is this op for this BE ? */
2058 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2059 continue;
2060
2061 /* only free hw when no longer used - check all FEs */
2062 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2063 continue;
2064
36fba62c
QZ		 2065 /* do not free hw if this BE is used by other FE */
2066 if (be->dpcm[stream].users > 1)
2067 continue;
2068
01d7584c
LG		 2069 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2070 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
08b27848 2072 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
5e82d2be
VK		 2073 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2074 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
01d7584c
LG		 2075 continue;
2076
103d84a3 2077 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
94d215cc 2078 be->dai_link->name);
01d7584c
LG		 2079
2080 soc_pcm_hw_free(be_substream);
2081
2082 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2083 }
2084
2085 return 0;
2086}
2087
45c0a188 2088static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c
LG		 2089{
2090 struct snd_soc_pcm_runtime *fe = substream->private_data;
2091 int err, stream = substream->stream;
2092
2093 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 2094 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 2095
103d84a3 2096 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
01d7584c
LG		 2097
2098 /* call hw_free on the frontend */
2099 err = soc_pcm_hw_free(substream);
2100 if (err < 0)
103d84a3 2101 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
01d7584c
LG		 2102 fe->dai_link->name);
2103
2104 /* only hw_params backends that are either sinks or sources
2105 * to this frontend DAI */
2106 err = dpcm_be_dai_hw_free(fe, stream);
2107
2108 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
ea9d0d77 2109 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2110
2111 mutex_unlock(&fe->card->mutex);
2112 return 0;
2113}
2114
23607025 2115int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2116{
2117 struct snd_soc_dpcm *dpcm;
2118 int ret;
2119
8d6258a4 2120 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2121
2122 struct snd_soc_pcm_runtime *be = dpcm->be;
2123 struct snd_pcm_substream *be_substream =
2124 snd_soc_dpcm_get_substream(be, stream);
2125
2126 /* is this op for this BE ? */
2127 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2128 continue;
2129
01d7584c
LG		 2130 /* copy params for each dpcm */
2131 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2132 sizeof(struct snd_pcm_hw_params));
2133
2134 /* perform any hw_params fixups */
2135 if (be->dai_link->be_hw_params_fixup) {
2136 ret = be->dai_link->be_hw_params_fixup(be,
2137 &dpcm->hw_params);
2138 if (ret < 0) {
2139 dev_err(be->dev,
103d84a3 2140 "ASoC: hw_params BE fixup failed %d\n",
01d7584c
LG		 2141 ret);
2142 goto unwind;
2143 }
2144 }
2145
ae061d2a
LY		 2146 /* copy the fixed-up hw params for BE dai */
2147 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2148 sizeof(struct snd_pcm_hw_params));
2149
b0639bd2
KM		 2150 /* only allow hw_params() if no connected FEs are running */
2151 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2152 continue;
2153
2154 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2155 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2156 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2157 continue;
2158
2159 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
94d215cc 2160 be->dai_link->name);
b0639bd2 2161
01d7584c
LG		 2162 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2163 if (ret < 0) {
2164 dev_err(dpcm->be->dev,
103d84a3 2165 "ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2166 goto unwind;
2167 }
2168
2169 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2170 }
2171 return 0;
2172
2173unwind:
2174 /* disable any enabled and non active backends */
8d6258a4 2175 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 2176 struct snd_soc_pcm_runtime *be = dpcm->be;
2177 struct snd_pcm_substream *be_substream =
2178 snd_soc_dpcm_get_substream(be, stream);
2179
2180 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2181 continue;
2182
2183 /* only allow hw_free() if no connected FEs are running */
2184 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2185 continue;
2186
2187 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2188 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2189 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2190 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2191 continue;
2192
2193 soc_pcm_hw_free(be_substream);
2194 }
2195
2196 return ret;
2197}
2198
45c0a188
MB		 2199static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2200 struct snd_pcm_hw_params *params)
01d7584c
LG		 2201{
2202 struct snd_soc_pcm_runtime *fe = substream->private_data;
2203 int ret, stream = substream->stream;
2204
2205 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 2206 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2207
2208 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2209 sizeof(struct snd_pcm_hw_params));
2210 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2211 if (ret < 0) {
103d84a3 2212 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2213 goto out;
2214 }
2215
103d84a3 2216 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
01d7584c
LG		 2217 fe->dai_link->name, params_rate(params),
2218 params_channels(params), params_format(params));
2219
2220 /* call hw_params on the frontend */
2221 ret = soc_pcm_hw_params(substream, params);
2222 if (ret < 0) {
103d84a3 2223 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
01d7584c
LG		 2224 dpcm_be_dai_hw_free(fe, stream);
2225 } else
2226 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2227
2228out:
ea9d0d77 2229 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2230 mutex_unlock(&fe->card->mutex);
2231 return ret;
2232}
2233
2234static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2235 struct snd_pcm_substream *substream, int cmd)
2236{
2237 int ret;
2238
103d84a3 2239 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
94d215cc 2240 dpcm->be->dai_link->name, cmd);
01d7584c
LG		 2241
2242 ret = soc_pcm_trigger(substream, cmd);
2243 if (ret < 0)
103d84a3 2244 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
01d7584c
LG		 2245
2246 return ret;
2247}
2248
23607025 2249int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
45c0a188 2250 int cmd)
01d7584c
LG		 2251{
2252 struct snd_soc_dpcm *dpcm;
2253 int ret = 0;
2254
8d6258a4 2255 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2256
2257 struct snd_soc_pcm_runtime *be = dpcm->be;
2258 struct snd_pcm_substream *be_substream =
2259 snd_soc_dpcm_get_substream(be, stream);
2260
2261 /* is this op for this BE ? */
2262 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2263 continue;
2264
2265 switch (cmd) {
2266 case SNDRV_PCM_TRIGGER_START:
2267 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2268 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2269 continue;
2270
2271 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2272 if (ret)
2273 return ret;
2274
2275 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2276 break;
2277 case SNDRV_PCM_TRIGGER_RESUME:
2278 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2279 continue;
2280
2281 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2282 if (ret)
2283 return ret;
2284
2285 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2286 break;
2287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2288 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2289 continue;
2290
2291 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2292 if (ret)
2293 return ret;
2294
2295 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2296 break;
2297 case SNDRV_PCM_TRIGGER_STOP:
2298 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2299 continue;
2300
2301 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2302 continue;
2303
2304 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2305 if (ret)
2306 return ret;
2307
2308 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2309 break;
2310 case SNDRV_PCM_TRIGGER_SUSPEND:
868a6ca8 2311 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
01d7584c
LG		 2312 continue;
2313
2314 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2315 continue;
2316
2317 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2318 if (ret)
2319 return ret;
2320
2321 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2322 break;
2323 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2324 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2325 continue;
2326
2327 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2328 continue;
2329
2330 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2331 if (ret)
2332 return ret;
2333
2334 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2335 break;
2336 }
2337 }
2338
2339 return ret;
2340}
2341EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2342
ea9d0d77 2343static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c
LG		 2344{
2345 struct snd_soc_pcm_runtime *fe = substream->private_data;
2346 int stream = substream->stream, ret;
2347 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2348
2349 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2350
2351 switch (trigger) {
2352 case SND_SOC_DPCM_TRIGGER_PRE:
2353 /* call trigger on the frontend before the backend. */
2354
103d84a3 2355 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
01d7584c
LG		 2356 fe->dai_link->name, cmd);
2357
2358 ret = soc_pcm_trigger(substream, cmd);
2359 if (ret < 0) {
103d84a3 2360 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
01d7584c
LG		 2361 goto out;
2362 }
2363
2364 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2365 break;
2366 case SND_SOC_DPCM_TRIGGER_POST:
2367 /* call trigger on the frontend after the backend. */
2368
2369 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2370 if (ret < 0) {
103d84a3 2371 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
01d7584c
LG		 2372 goto out;
2373 }
2374
103d84a3 2375 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
01d7584c
LG		 2376 fe->dai_link->name, cmd);
2377
2378 ret = soc_pcm_trigger(substream, cmd);
2379 break;
07bf84aa
LG		 2380 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2381 /* bespoke trigger() - handles both FE and BEs */
2382
103d84a3 2383 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
07bf84aa
LG		 2384 fe->dai_link->name, cmd);
2385
2386 ret = soc_pcm_bespoke_trigger(substream, cmd);
2387 if (ret < 0) {
103d84a3 2388 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
07bf84aa
LG		 2389 goto out;
2390 }
2391 break;
01d7584c 2392 default:
103d84a3 2393 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
01d7584c
LG		 2394 fe->dai_link->name);
2395 ret = -EINVAL;
2396 goto out;
2397 }
2398
2399 switch (cmd) {
2400 case SNDRV_PCM_TRIGGER_START:
2401 case SNDRV_PCM_TRIGGER_RESUME:
2402 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2403 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2404 break;
2405 case SNDRV_PCM_TRIGGER_STOP:
2406 case SNDRV_PCM_TRIGGER_SUSPEND:
01d7584c
LG		 2407 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2408 break;
9f169b9f
PL		 2409 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2410 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2411 break;
01d7584c
LG		 2412 }
2413
2414out:
2415 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2416 return ret;
2417}
2418
ea9d0d77
TI		 2419static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2420{
2421 struct snd_soc_pcm_runtime *fe = substream->private_data;
2422 int stream = substream->stream;
2423
2424 /* if FE's runtime_update is already set, we're in race;
2425 * process this trigger later at exit
2426 */
2427 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2428 fe->dpcm[stream].trigger_pending = cmd + 1;
2429 return 0; /* delayed, assuming it's successful */
2430 }
2431
2432 /* we're alone, let's trigger */
2433 return dpcm_fe_dai_do_trigger(substream, cmd);
2434}
2435
23607025 2436int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2437{
2438 struct snd_soc_dpcm *dpcm;
2439 int ret = 0;
2440
8d6258a4 2441 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2442
2443 struct snd_soc_pcm_runtime *be = dpcm->be;
2444 struct snd_pcm_substream *be_substream =
2445 snd_soc_dpcm_get_substream(be, stream);
2446
2447 /* is this op for this BE ? */
2448 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2449 continue;
2450
2451 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
95f444dc 2452 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
5087a8f1
LY		 2453 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2454 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
01d7584c
LG		 2455 continue;
2456
103d84a3 2457 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
94d215cc 2458 be->dai_link->name);
01d7584c
LG		 2459
2460 ret = soc_pcm_prepare(be_substream);
2461 if (ret < 0) {
103d84a3 2462 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
01d7584c
LG		 2463 ret);
2464 break;
2465 }
2466
2467 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2468 }
2469 return ret;
2470}
2471
45c0a188 2472static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c
LG		 2473{
2474 struct snd_soc_pcm_runtime *fe = substream->private_data;
2475 int stream = substream->stream, ret = 0;
2476
2477 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2478
103d84a3 2479 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
01d7584c 2480
ea9d0d77 2481 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2482
2483 /* there is no point preparing this FE if there are no BEs */
2484 if (list_empty(&fe->dpcm[stream].be_clients)) {
103d84a3 2485 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
01d7584c
LG		 2486 fe->dai_link->name);
2487 ret = -EINVAL;
2488 goto out;
2489 }
2490
2491 ret = dpcm_be_dai_prepare(fe, substream->stream);
2492 if (ret < 0)
2493 goto out;
2494
2495 /* call prepare on the frontend */
2496 ret = soc_pcm_prepare(substream);
2497 if (ret < 0) {
103d84a3 2498 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
01d7584c
LG		 2499 fe->dai_link->name);
2500 goto out;
2501 }
2502
2503 /* run the stream event for each BE */
2504 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2505 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2506
2507out:
ea9d0d77 2508 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2509 mutex_unlock(&fe->card->mutex);
2510
2511 return ret;
2512}
2513
618dae11
LG		 2514static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2515{
07bf84aa
LG		 2516 struct snd_pcm_substream *substream =
2517 snd_soc_dpcm_get_substream(fe, stream);
2518 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 2519 int err;
2520
103d84a3 2521 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
618dae11
LG		 2522 stream ? "capture" : "playback", fe->dai_link->name);
2523
07bf84aa
LG		 2524 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2525 /* call bespoke trigger - FE takes care of all BE triggers */
103d84a3 2526 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
07bf84aa
LG		 2527 fe->dai_link->name);
2528
2529 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2530 if (err < 0)
103d84a3 2531 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2532 } else {
103d84a3 2533 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
07bf84aa
LG		 2534 fe->dai_link->name);
2535
2536 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2537 if (err < 0)
103d84a3 2538 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2539 }
618dae11
LG		 2540
2541 err = dpcm_be_dai_hw_free(fe, stream);
2542 if (err < 0)
103d84a3 2543 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
618dae11
LG		 2544
2545 err = dpcm_be_dai_shutdown(fe, stream);
2546 if (err < 0)
103d84a3 2547 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
618dae11
LG		 2548
2549 /* run the stream event for each BE */
2550 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2551
2552 return 0;
2553}
2554
2555static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2556{
07bf84aa
LG		 2557 struct snd_pcm_substream *substream =
2558 snd_soc_dpcm_get_substream(fe, stream);
618dae11 2559 struct snd_soc_dpcm *dpcm;
07bf84aa 2560 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11 2561 int ret;
a9764869 2562 unsigned long flags;
618dae11 2563
103d84a3 2564 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
618dae11
LG		 2565 stream ? "capture" : "playback", fe->dai_link->name);
2566
2567 /* Only start the BE if the FE is ready */
2568 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2569 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2570 return -EINVAL;
2571
2572 /* startup must always be called for new BEs */
2573 ret = dpcm_be_dai_startup(fe, stream);
fffc0ca2 2574 if (ret < 0)
618dae11 2575 goto disconnect;
618dae11
LG		 2576
2577 /* keep going if FE state is > open */
2578 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2579 return 0;
01d7584c 2580
618dae11 2581 ret = dpcm_be_dai_hw_params(fe, stream);
fffc0ca2 2582 if (ret < 0)
618dae11 2583 goto close;
618dae11
LG		 2584
2585 /* keep going if FE state is > hw_params */
2586 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2587 return 0;
2588
2589
2590 ret = dpcm_be_dai_prepare(fe, stream);
fffc0ca2 2591 if (ret < 0)
618dae11 2592 goto hw_free;
618dae11
LG		 2593
2594 /* run the stream event for each BE */
2595 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2596
2597 /* keep going if FE state is > prepare */
2598 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2599 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2600 return 0;
2601
07bf84aa
LG		 2602 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2603 /* call trigger on the frontend - FE takes care of all BE triggers */
103d84a3 2604 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
07bf84aa 2605 fe->dai_link->name);
618dae11 2606
07bf84aa
LG		 2607 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2608 if (ret < 0) {
103d84a3 2609 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
07bf84aa
LG		 2610 goto hw_free;
2611 }
2612 } else {
103d84a3 2613 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
07bf84aa
LG		 2614 fe->dai_link->name);
2615
2616 ret = dpcm_be_dai_trigger(fe, stream,
2617 SNDRV_PCM_TRIGGER_START);
2618 if (ret < 0) {
103d84a3 2619 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
07bf84aa
LG		 2620 goto hw_free;
2621 }
618dae11
LG		 2622 }
2623
2624 return 0;
2625
2626hw_free:
2627 dpcm_be_dai_hw_free(fe, stream);
2628close:
2629 dpcm_be_dai_shutdown(fe, stream);
2630disconnect:
2631 /* disconnect any non started BEs */
a9764869 2632 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 2633 for_each_dpcm_be(fe, stream, dpcm) {
618dae11
LG		 2634 struct snd_soc_pcm_runtime *be = dpcm->be;
2635 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2636 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2637 }
a9764869 2638 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
618dae11
LG		 2639
2640 return ret;
2641}
2642
2643static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2644{
2645 int ret;
2646
ea9d0d77 2647 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2648 ret = dpcm_run_update_startup(fe, stream);
2649 if (ret < 0)
103d84a3 2650 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
ea9d0d77 2651 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2652
2653 return ret;
2654}
2655
2656static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2657{
2658 int ret;
2659
ea9d0d77 2660 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2661 ret = dpcm_run_update_shutdown(fe, stream);
2662 if (ret < 0)
103d84a3 2663 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
ea9d0d77 2664 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2665
2666 return ret;
2667}
2668
de15d7ff 2669static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
618dae11 2670{
de15d7ff
JB		 2671 struct snd_soc_dapm_widget_list *list;
2672 int count, paths;
618dae11 2673
de15d7ff
JB		 2674 if (!fe->dai_link->dynamic)
2675 return 0;
618dae11 2676
de15d7ff
JB		 2677 /* only check active links */
2678 if (!fe->cpu_dai->active)
2679 return 0;
618dae11 2680
de15d7ff
JB		 2681 /* DAPM sync will call this to update DSP paths */
2682 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2683 new ? "new" : "old", fe->dai_link->name);
618dae11 2684
de15d7ff 2685 /* skip if FE doesn't have playback capability */
467fece8
KM		 2686 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2687 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
de15d7ff 2688 goto capture;
618dae11 2689
de15d7ff
JB		 2690 /* skip if FE isn't currently playing */
2691 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2692 goto capture;
618dae11 2693
de15d7ff
JB		 2694 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2695 if (paths < 0) {
2696 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2697 fe->dai_link->name, "playback");
2698 return paths;
2699 }
618dae11 2700
de15d7ff
JB		 2701 /* update any playback paths */
2702 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2703 if (count) {
2704 if (new)
2705 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2706 else
618dae11 2707 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
618dae11 2708
de15d7ff
JB		 2709 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2710 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2711 }
2712
2713 dpcm_path_put(&list);
2714
618dae11 2715capture:
de15d7ff 2716 /* skip if FE doesn't have capture capability */
467fece8
KM		 2717 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2718 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
de15d7ff 2719 return 0;
075207d2 2720
de15d7ff
JB		 2721 /* skip if FE isn't currently capturing */
2722 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2723 return 0;
618dae11 2724
de15d7ff
JB		 2725 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2726 if (paths < 0) {
2727 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2728 fe->dai_link->name, "capture");
2729 return paths;
2730 }
618dae11 2731
de15d7ff
JB		 2732 /* update any old capture paths */
2733 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2734 if (count) {
2735 if (new)
618dae11 2736 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
de15d7ff 2737 else
618dae11 2738 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
618dae11 2739
de15d7ff
JB		 2740 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2741 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
618dae11
LG		 2742 }
2743
de15d7ff
JB		 2744 dpcm_path_put(&list);
2745
618dae11
LG		 2746 return 0;
2747}
de15d7ff
JB		 2748
2749/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2750 * any DAI links.
2751 */
2752int soc_dpcm_runtime_update(struct snd_soc_card *card)
2753{
2754 struct snd_soc_pcm_runtime *fe;
2755 int ret = 0;
2756
2757 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2758 /* shutdown all old paths first */
bcb1fd1f 2759 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2760 ret = soc_dpcm_fe_runtime_update(fe, 0);
2761 if (ret)
2762 goto out;
2763 }
2764
2765 /* bring new paths up */
bcb1fd1f 2766 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2767 ret = soc_dpcm_fe_runtime_update(fe, 1);
2768 if (ret)
2769 goto out;
2770 }
2771
2772out:
2773 mutex_unlock(&card->mutex);
2774 return ret;
2775}
01d7584c
LG		 2776int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2777{
2778 struct snd_soc_dpcm *dpcm;
7afecb30 2779 struct snd_soc_dai *dai;
01d7584c 2780
8d6258a4 2781 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
01d7584c
LG		 2782
2783 struct snd_soc_pcm_runtime *be = dpcm->be;
2e5894d7 2784 int i;
01d7584c
LG		 2785
2786 if (be->dai_link->ignore_suspend)
2787 continue;
2788
7afecb30 2789 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 2790 struct snd_soc_dai_driver *drv = dai->driver;
2791
2792 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2793 be->dai_link->name);
01d7584c 2794
2e5894d7
BC		 2795 if (drv->ops && drv->ops->digital_mute &&
2796 dai->playback_active)
2797 drv->ops->digital_mute(dai, mute);
2798 }
01d7584c
LG		 2799 }
2800
2801 return 0;
2802}
2803
45c0a188 2804static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2805{
2806 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2807 struct snd_soc_dpcm *dpcm;
2808 struct snd_soc_dapm_widget_list *list;
2809 int ret;
2810 int stream = fe_substream->stream;
2811
2812 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2813 fe->dpcm[stream].runtime = fe_substream->runtime;
2814
8f70e515
QZ		 2815 ret = dpcm_path_get(fe, stream, &list);
2816 if (ret < 0) {
2817 mutex_unlock(&fe->card->mutex);
2818 return ret;
2819 } else if (ret == 0) {
103d84a3 2820 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
01d7584c 2821 fe->dai_link->name, stream ? "capture" : "playback");
01d7584c
LG		 2822 }
2823
2824 /* calculate valid and active FE <-> BE dpcms */
2825 dpcm_process_paths(fe, stream, &list, 1);
2826
2827 ret = dpcm_fe_dai_startup(fe_substream);
2828 if (ret < 0) {
2829 /* clean up all links */
8d6258a4 2830 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2831 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2832
2833 dpcm_be_disconnect(fe, stream);
2834 fe->dpcm[stream].runtime = NULL;
2835 }
2836
2837 dpcm_clear_pending_state(fe, stream);
2838 dpcm_path_put(&list);
2839 mutex_unlock(&fe->card->mutex);
2840 return ret;
2841}
2842
45c0a188 2843static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2844{
2845 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2846 struct snd_soc_dpcm *dpcm;
2847 int stream = fe_substream->stream, ret;
2848
2849 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2850 ret = dpcm_fe_dai_shutdown(fe_substream);
2851
2852 /* mark FE's links ready to prune */
8d6258a4 2853 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2854 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2855
2856 dpcm_be_disconnect(fe, stream);
2857
2858 fe->dpcm[stream].runtime = NULL;
2859 mutex_unlock(&fe->card->mutex);
2860 return ret;
2861}
2862
5d61f0ba
TI		 2863static void soc_pcm_private_free(struct snd_pcm *pcm)
2864{
2865 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
f523aceb 2866
f30a4c31
KM		 2867 /* need to sync the delayed work before releasing resources */
2868 flush_delayed_work(&rtd->delayed_work);
79776da0 2869 snd_soc_pcm_component_free(pcm);
5d61f0ba
TI		 2870}
2871
ddee627c
LG		 2872/* create a new pcm */
2873int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2874{
2e5894d7 2875 struct snd_soc_dai *codec_dai;
ddee627c 2876 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
f523aceb 2877 struct snd_soc_rtdcom_list *rtdcom;
ddee627c
LG		 2878 struct snd_pcm *pcm;
2879 char new_name[64];
2880 int ret = 0, playback = 0, capture = 0;
2e5894d7 2881 int i;
ddee627c 2882
01d7584c 2883 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
1e9de42f
LG		 2884 playback = rtd->dai_link->dpcm_playback;
2885 capture = rtd->dai_link->dpcm_capture;
01d7584c 2886 } else {
a342031c
JB		 2887 /* Adapt stream for codec2codec links */
2888 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2889 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2890 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2891 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2892
0b7990e3 2893 for_each_rtd_codec_dai(rtd, i, codec_dai) {
467fece8
KM		 2894 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2895 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2e5894d7 2896 playback = 1;
467fece8
KM		 2897 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2898 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2e5894d7
BC		 2899 capture = 1;
2900 }
a342031c
JB		 2901
2902 capture = capture && cpu_capture->channels_min;
2903 playback = playback && cpu_playback->channels_min;
01d7584c
LG		 2904 }
2905
d6bead02
FE		 2906 if (rtd->dai_link->playback_only) {
2907 playback = 1;
2908 capture = 0;
2909 }
2910
2911 if (rtd->dai_link->capture_only) {
2912 playback = 0;
2913 capture = 1;
2914 }
2915
01d7584c 2916 /* create the PCM */
a342031c
JB		 2917 if (rtd->dai_link->params) {
2918 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2919 rtd->dai_link->stream_name);
2920
2921 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2922 playback, capture, &pcm);
2923 } else if (rtd->dai_link->no_pcm) {
01d7584c
LG		 2924 snprintf(new_name, sizeof(new_name), "(%s)",
2925 rtd->dai_link->stream_name);
2926
2927 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2928 playback, capture, &pcm);
2929 } else {
2930 if (rtd->dai_link->dynamic)
2931 snprintf(new_name, sizeof(new_name), "%s (*)",
2932 rtd->dai_link->stream_name);
2933 else
2934 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2e5894d7
BC		 2935 rtd->dai_link->stream_name,
2936 (rtd->num_codecs > 1) ?
2937 "multicodec" : rtd->codec_dai->name, num);
01d7584c
LG		 2938
2939 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2940 capture, &pcm);
2941 }
ddee627c 2942 if (ret < 0) {
103d84a3 2943 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
5cb9b748 2944 rtd->dai_link->name);
ddee627c
LG		 2945 return ret;
2946 }
103d84a3 2947 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
ddee627c
LG		 2948
2949 /* DAPM dai link stream work */
a342031c
JB		 2950 if (rtd->dai_link->params)
2951 INIT_DELAYED_WORK(&rtd->delayed_work,
2952 codec2codec_close_delayed_work);
2953 else
2954 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
ddee627c 2955
48c7699f 2956 pcm->nonatomic = rtd->dai_link->nonatomic;
ddee627c
LG		 2957 rtd->pcm = pcm;
2958 pcm->private_data = rtd;
01d7584c 2959
a342031c 2960 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
01d7584c
LG		 2961 if (playback)
2962 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2963 if (capture)
2964 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2965 goto out;
2966 }
2967
2968 /* ASoC PCM operations */
2969 if (rtd->dai_link->dynamic) {
2970 rtd->ops.open = dpcm_fe_dai_open;
2971 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2972 rtd->ops.prepare = dpcm_fe_dai_prepare;
2973 rtd->ops.trigger = dpcm_fe_dai_trigger;
2974 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2975 rtd->ops.close = dpcm_fe_dai_close;
2976 rtd->ops.pointer = soc_pcm_pointer;
96a47908 2977 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
01d7584c
LG		 2978 } else {
2979 rtd->ops.open = soc_pcm_open;
2980 rtd->ops.hw_params = soc_pcm_hw_params;
2981 rtd->ops.prepare = soc_pcm_prepare;
2982 rtd->ops.trigger = soc_pcm_trigger;
2983 rtd->ops.hw_free = soc_pcm_hw_free;
2984 rtd->ops.close = soc_pcm_close;
2985 rtd->ops.pointer = soc_pcm_pointer;
96a47908 2986 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
01d7584c
LG		 2987 }
2988
b8135864 2989 for_each_rtdcom(rtd, rtdcom) {
e2cb4a14 2990 const struct snd_soc_component_driver *drv = rtdcom->component->driver;
b8135864 2991
e9067bb5 2992 if (drv->copy_user)
82d81f5c 2993 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
e9067bb5 2994 if (drv->page)
9c712e4f 2995 rtd->ops.page = snd_soc_pcm_component_page;
e9067bb5 2996 if (drv->mmap)
205875e1 2997 rtd->ops.mmap = snd_soc_pcm_component_mmap;
ddee627c
LG		 2998 }
2999
3000 if (playback)
01d7584c 3001 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 3002
3003 if (capture)
01d7584c 3004 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c 3005
7484291e
KM		 3006 ret = snd_soc_pcm_component_new(pcm);
3007 if (ret < 0) {
3008 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3009 return ret;
ddee627c 3010 }
c641e5b2 3011
5d61f0ba 3012 pcm->private_free = soc_pcm_private_free;
3d21ef0b 3013 pcm->no_device_suspend = true;
01d7584c 3014out:
2e5894d7
BC		 3015 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3016 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3017 cpu_dai->name);
ddee627c
LG		 3018 return ret;
3019}
01d7584c
LG		 3020
3021/* is the current PCM operation for this FE ? */
3022int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3023{
3024 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3025 return 1;
3026 return 0;
3027}
3028EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3029
3030/* is the current PCM operation for this BE ? */
3031int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3032 struct snd_soc_pcm_runtime *be, int stream)
3033{
3034 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3035 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3036 be->dpcm[stream].runtime_update))
3037 return 1;
3038 return 0;
3039}
3040EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3041
3042/* get the substream for this BE */
3043struct snd_pcm_substream *
3044 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3045{
3046 return be->pcm->streams[stream].substream;
3047}
3048EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3049
3050/* get the BE runtime state */
3051enum snd_soc_dpcm_state
3052 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3053{
3054 return be->dpcm[stream].state;
3055}
3056EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3057
3058/* set the BE runtime state */
3059void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3060 int stream, enum snd_soc_dpcm_state state)
3061{
3062 be->dpcm[stream].state = state;
3063}
3064EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3065
3066/*
3067 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3068 * are not running, paused or suspended for the specified stream direction.
3069 */
3070int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3071 struct snd_soc_pcm_runtime *be, int stream)
3072{
3073 struct snd_soc_dpcm *dpcm;
3074 int state;
a9764869
KC		 3075 int ret = 1;
3076 unsigned long flags;
01d7584c 3077
a9764869 3078 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
d2e24d64 3079 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3080
3081 if (dpcm->fe == fe)
3082 continue;
3083
3084 state = dpcm->fe->dpcm[stream].state;
3085 if (state == SND_SOC_DPCM_STATE_START ||
3086 state == SND_SOC_DPCM_STATE_PAUSED ||
a9764869
KC		 3087 state == SND_SOC_DPCM_STATE_SUSPEND) {
3088 ret = 0;
3089 break;
3090 }
01d7584c 3091 }
a9764869 3092 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 3093
3094 /* it's safe to free/stop this BE DAI */
a9764869 3095 return ret;
01d7584c
LG		 3096}
3097EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3098
3099/*
3100 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3101 * running, paused or suspended for the specified stream direction.
3102 */
3103int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3104 struct snd_soc_pcm_runtime *be, int stream)
3105{
3106 struct snd_soc_dpcm *dpcm;
3107 int state;
a9764869
KC		 3108 int ret = 1;
3109 unsigned long flags;
01d7584c 3110
a9764869 3111 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
d2e24d64 3112 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3113
3114 if (dpcm->fe == fe)
3115 continue;
3116
3117 state = dpcm->fe->dpcm[stream].state;
3118 if (state == SND_SOC_DPCM_STATE_START ||
3119 state == SND_SOC_DPCM_STATE_PAUSED ||
3120 state == SND_SOC_DPCM_STATE_SUSPEND ||
a9764869
KC		 3121 state == SND_SOC_DPCM_STATE_PREPARE) {
3122 ret = 0;
3123 break;
3124 }
01d7584c 3125 }
a9764869 3126 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 3127
3128 /* it's safe to change hw_params */
a9764869 3129 return ret;
01d7584c
LG		 3130}
3131EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
f86dcef8
LG		 3132
3133#ifdef CONFIG_DEBUG_FS
85280141 3134static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
f86dcef8
LG		 3135{
3136 switch (state) {
3137 case SND_SOC_DPCM_STATE_NEW:
3138 return "new";
3139 case SND_SOC_DPCM_STATE_OPEN:
3140 return "open";
3141 case SND_SOC_DPCM_STATE_HW_PARAMS:
3142 return "hw_params";
3143 case SND_SOC_DPCM_STATE_PREPARE:
3144 return "prepare";
3145 case SND_SOC_DPCM_STATE_START:
3146 return "start";
3147 case SND_SOC_DPCM_STATE_STOP:
3148 return "stop";
3149 case SND_SOC_DPCM_STATE_SUSPEND:
3150 return "suspend";
3151 case SND_SOC_DPCM_STATE_PAUSED:
3152 return "paused";
3153 case SND_SOC_DPCM_STATE_HW_FREE:
3154 return "hw_free";
3155 case SND_SOC_DPCM_STATE_CLOSE:
3156 return "close";
3157 }
3158
3159 return "unknown";
3160}
3161
f86dcef8
LG		 3162static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3163 int stream, char *buf, size_t size)
3164{
3165 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3166 struct snd_soc_dpcm *dpcm;
3167 ssize_t offset = 0;
a9764869 3168 unsigned long flags;
f86dcef8
LG		 3169
3170 /* FE state */
3171 offset += snprintf(buf + offset, size - offset,
3172 "[%s - %s]\n", fe->dai_link->name,
3173 stream ? "Capture" : "Playback");
3174
3175 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3176 dpcm_state_string(fe->dpcm[stream].state));
3177
3178 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3179 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3180 offset += snprintf(buf + offset, size - offset,
3181 "Hardware Params: "
3182 "Format = %s, Channels = %d, Rate = %d\n",
3183 snd_pcm_format_name(params_format(params)),
3184 params_channels(params),
3185 params_rate(params));
3186
3187 /* BEs state */
3188 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3189
3190 if (list_empty(&fe->dpcm[stream].be_clients)) {
3191 offset += snprintf(buf + offset, size - offset,
3192 " No active DSP links\n");
3193 goto out;
3194 }
3195
a9764869 3196 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 3197 for_each_dpcm_be(fe, stream, dpcm) {
f86dcef8
LG		 3198 struct snd_soc_pcm_runtime *be = dpcm->be;
3199 params = &dpcm->hw_params;
3200
3201 offset += snprintf(buf + offset, size - offset,
3202 "- %s\n", be->dai_link->name);
3203
3204 offset += snprintf(buf + offset, size - offset,
3205 " State: %s\n",
3206 dpcm_state_string(be->dpcm[stream].state));
3207
3208 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3209 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3210 offset += snprintf(buf + offset, size - offset,
3211 " Hardware Params: "
3212 "Format = %s, Channels = %d, Rate = %d\n",
3213 snd_pcm_format_name(params_format(params)),
3214 params_channels(params),
3215 params_rate(params));
3216 }
a9764869 3217 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
f86dcef8
LG		 3218out:
3219 return offset;
3220}
3221
3222static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3223 size_t count, loff_t *ppos)
3224{
3225 struct snd_soc_pcm_runtime *fe = file->private_data;
3226 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3227 char *buf;
3228
3229 buf = kmalloc(out_count, GFP_KERNEL);
3230 if (!buf)
3231 return -ENOMEM;
3232
467fece8 3233 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
f86dcef8
LG		 3234 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3235 buf + offset, out_count - offset);
3236
467fece8 3237 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
f86dcef8
LG		 3238 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3239 buf + offset, out_count - offset);
3240
f57b8488 3241 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
f86dcef8 3242
f57b8488
LG		 3243 kfree(buf);
3244 return ret;
f86dcef8
LG		 3245}
3246
3247static const struct file_operations dpcm_state_fops = {
f57b8488 3248 .open = simple_open,
f86dcef8
LG		 3249 .read = dpcm_state_read_file,
3250 .llseek = default_llseek,
3251};
3252
2e55b90a 3253void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
f86dcef8 3254{
b3bba9a1 3255 if (!rtd->dai_link)
2e55b90a 3256 return;
b3bba9a1 3257
596becd3
KM		 3258 if (!rtd->dai_link->dynamic)
3259 return;
3260
6553bf06
LPC		 3261 if (!rtd->card->debugfs_card_root)
3262 return;
b3bba9a1 3263
f86dcef8
LG		 3264 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3265 rtd->card->debugfs_card_root);
f86dcef8 3266
f1e3f409
FE		 3267 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3268 rtd, &dpcm_state_fops);
f86dcef8
LG		 3269}
3270#endif
Linux 6.x block layer and io_uring tree(s)