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ASoC: pcm: Make ioctl ops optional
[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
2b544dd7 121 for_each_rtd_components(rtd, rtdcom, component)
72c38184 122 ignore &= !component->driver->use_pmdown_time;
fbb16563 123
fbb16563 124 return ignore;
208a1589
LPC		 125}
126
90996f43
LPC		 127/**
128 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
129 * @substream: the pcm substream
130 * @hw: the hardware parameters
131 *
132 * Sets the substream runtime hardware parameters.
133 */
134int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
135 const struct snd_pcm_hardware *hw)
136{
137 struct snd_pcm_runtime *runtime = substream->runtime;
138 runtime->hw.info = hw->info;
139 runtime->hw.formats = hw->formats;
140 runtime->hw.period_bytes_min = hw->period_bytes_min;
141 runtime->hw.period_bytes_max = hw->period_bytes_max;
142 runtime->hw.periods_min = hw->periods_min;
143 runtime->hw.periods_max = hw->periods_max;
144 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
145 runtime->hw.fifo_size = hw->fifo_size;
146 return 0;
147}
148EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
149
01d7584c 150/* DPCM stream event, send event to FE and all active BEs. */
23607025 151int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
01d7584c
LG		 152 int event)
153{
154 struct snd_soc_dpcm *dpcm;
155
8d6258a4 156 for_each_dpcm_be(fe, dir, dpcm) {
01d7584c
LG		 157
158 struct snd_soc_pcm_runtime *be = dpcm->be;
159
103d84a3 160 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
01d7584c
LG		 161 be->dai_link->name, event, dir);
162
b1cd2e34
BG		 163 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
164 (be->dpcm[dir].users >= 1))
165 continue;
166
01d7584c
LG		 167 snd_soc_dapm_stream_event(be, dir, event);
168 }
169
170 snd_soc_dapm_stream_event(fe, dir, event);
171
172 return 0;
173}
174
17841020
DA		 175static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
176 struct snd_soc_dai *soc_dai)
ddee627c
LG		 177{
178 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c
LG		 179 int ret;
180
3635bf09
NC		 181 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
182 rtd->dai_link->symmetric_rates)) {
183 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
184 soc_dai->rate);
185
4dcdd43b 186 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 187 SNDRV_PCM_HW_PARAM_RATE,
4dcdd43b 188 soc_dai->rate);
3635bf09
NC		 189 if (ret < 0) {
190 dev_err(soc_dai->dev,
191 "ASoC: Unable to apply rate constraint: %d\n",
192 ret);
193 return ret;
194 }
195 }
ddee627c 196
3635bf09
NC		 197 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
198 rtd->dai_link->symmetric_channels)) {
199 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
200 soc_dai->channels);
ddee627c 201
4dcdd43b 202 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 203 SNDRV_PCM_HW_PARAM_CHANNELS,
3635bf09
NC		 204 soc_dai->channels);
205 if (ret < 0) {
206 dev_err(soc_dai->dev,
207 "ASoC: Unable to apply channel symmetry constraint: %d\n",
208 ret);
209 return ret;
210 }
ddee627c
LG		 211 }
212
3635bf09
NC		 213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
214 rtd->dai_link->symmetric_samplebits)) {
215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
216 soc_dai->sample_bits);
ddee627c 217
4dcdd43b 218 ret = snd_pcm_hw_constraint_single(substream->runtime,
3635bf09 219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
3635bf09
NC		 220 soc_dai->sample_bits);
221 if (ret < 0) {
222 dev_err(soc_dai->dev,
223 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
224 ret);
225 return ret;
226 }
ddee627c
LG		 227 }
228
229 return 0;
230}
231
3635bf09
NC		 232static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
234{
235 struct snd_soc_pcm_runtime *rtd = substream->private_data;
236 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 237 struct snd_soc_dai *codec_dai;
2e5894d7 238 unsigned int rate, channels, sample_bits, symmetry, i;
3635bf09
NC		 239
240 rate = params_rate(params);
241 channels = params_channels(params);
242 sample_bits = snd_pcm_format_physical_width(params_format(params));
243
244 /* reject unmatched parameters when applying symmetry */
245 symmetry = cpu_dai->driver->symmetric_rates ||
3635bf09 246 rtd->dai_link->symmetric_rates;
2e5894d7 247
0b7990e3
KM		 248 for_each_rtd_codec_dai(rtd, i, codec_dai)
249 symmetry |= codec_dai->driver->symmetric_rates;
2e5894d7 250
3635bf09
NC		 251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
253 cpu_dai->rate, rate);
254 return -EINVAL;
ddee627c
LG		 255 }
256
3635bf09 257 symmetry = cpu_dai->driver->symmetric_channels ||
3635bf09 258 rtd->dai_link->symmetric_channels;
2e5894d7 259
0b7990e3
KM		 260 for_each_rtd_codec_dai(rtd, i, codec_dai)
261 symmetry |= codec_dai->driver->symmetric_channels;
2e5894d7 262
3635bf09
NC		 263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
265 cpu_dai->channels, channels);
266 return -EINVAL;
267 }
ddee627c 268
3635bf09 269 symmetry = cpu_dai->driver->symmetric_samplebits ||
3635bf09 270 rtd->dai_link->symmetric_samplebits;
2e5894d7 271
0b7990e3
KM		 272 for_each_rtd_codec_dai(rtd, i, codec_dai)
273 symmetry |= codec_dai->driver->symmetric_samplebits;
2e5894d7 274
3635bf09
NC		 275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
277 cpu_dai->sample_bits, sample_bits);
278 return -EINVAL;
ddee627c
LG		 279 }
280
281 return 0;
282}
283
62e5f676
LPC		 284static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
285{
286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
62e5f676 288 struct snd_soc_dai_link *link = rtd->dai_link;
0b7990e3 289 struct snd_soc_dai *codec_dai;
2e5894d7 290 unsigned int symmetry, i;
62e5f676 291
2e5894d7
BC		 292 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
293 cpu_driver->symmetric_channels || link->symmetric_channels ||
294 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
62e5f676 295
0b7990e3 296 for_each_rtd_codec_dai(rtd, i, codec_dai)
2e5894d7 297 symmetry = symmetry ||
0b7990e3
KM		 298 codec_dai->driver->symmetric_rates ||
299 codec_dai->driver->symmetric_channels ||
300 codec_dai->driver->symmetric_samplebits;
2e5894d7
BC		 301
302 return symmetry;
62e5f676
LPC		 303}
304
2e5894d7 305static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
58ba9b25 306{
2e5894d7 307 struct snd_soc_pcm_runtime *rtd = substream->private_data;
c6068d3a 308 int ret;
58ba9b25
MB		 309
310 if (!bits)
311 return;
312
0e2a3751
LPC		 313 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
314 if (ret != 0)
315 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
316 bits, ret);
58ba9b25
MB		 317}
318
c8dd1fec
BC		 319static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
320{
321 struct snd_soc_pcm_runtime *rtd = substream->private_data;
322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 323 struct snd_soc_dai *codec_dai;
324 int i;
c8dd1fec
BC		 325 unsigned int bits = 0, cpu_bits;
326
327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
0b7990e3 328 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 329 if (codec_dai->driver->playback.sig_bits == 0) {
330 bits = 0;
331 break;
332 }
333 bits = max(codec_dai->driver->playback.sig_bits, bits);
334 }
c8dd1fec
BC		 335 cpu_bits = cpu_dai->driver->playback.sig_bits;
336 } else {
0b7990e3 337 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5e63dfcc 338 if (codec_dai->driver->capture.sig_bits == 0) {
2e5894d7
BC		 339 bits = 0;
340 break;
341 }
342 bits = max(codec_dai->driver->capture.sig_bits, bits);
343 }
c8dd1fec
BC		 344 cpu_bits = cpu_dai->driver->capture.sig_bits;
345 }
346
2e5894d7
BC		 347 soc_pcm_set_msb(substream, bits);
348 soc_pcm_set_msb(substream, cpu_bits);
c8dd1fec
BC		 349}
350
2e5894d7 351static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
bd477c31 352{
2e5894d7 353 struct snd_pcm_runtime *runtime = substream->runtime;
78e45c99 354 struct snd_pcm_hardware *hw = &runtime->hw;
2e5894d7 355 struct snd_soc_pcm_runtime *rtd = substream->private_data;
0b7990e3 356 struct snd_soc_dai *codec_dai;
2e5894d7
BC		 357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
358 struct snd_soc_dai_driver *codec_dai_drv;
359 struct snd_soc_pcm_stream *codec_stream;
360 struct snd_soc_pcm_stream *cpu_stream;
361 unsigned int chan_min = 0, chan_max = UINT_MAX;
362 unsigned int rate_min = 0, rate_max = UINT_MAX;
363 unsigned int rates = UINT_MAX;
364 u64 formats = ULLONG_MAX;
365 int i;
78e45c99 366
2e5894d7
BC		 367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
368 cpu_stream = &cpu_dai_drv->playback;
16d7ea91 369 else
2e5894d7 370 cpu_stream = &cpu_dai_drv->capture;
78e45c99 371
2e5894d7 372 /* first calculate min/max only for CODECs in the DAI link */
0b7990e3 373 for_each_rtd_codec_dai(rtd, i, codec_dai) {
cde79035
RW		 374
375 /*
376 * Skip CODECs which don't support the current stream type.
377 * Otherwise, since the rate, channel, and format values will
378 * zero in that case, we would have no usable settings left,
379 * causing the resulting setup to fail.
380 * At least one CODEC should match, otherwise we should have
381 * bailed out on a higher level, since there would be no
382 * CODEC to support the transfer direction in that case.
383 */
0b7990e3 384 if (!snd_soc_dai_stream_valid(codec_dai,
cde79035
RW		 385 substream->stream))
386 continue;
387
0b7990e3 388 codec_dai_drv = codec_dai->driver;
2e5894d7
BC		 389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
390 codec_stream = &codec_dai_drv->playback;
391 else
392 codec_stream = &codec_dai_drv->capture;
393 chan_min = max(chan_min, codec_stream->channels_min);
394 chan_max = min(chan_max, codec_stream->channels_max);
395 rate_min = max(rate_min, codec_stream->rate_min);
396 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
397 formats &= codec_stream->formats;
398 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
399 }
400
401 /*
402 * chan min/max cannot be enforced if there are multiple CODEC DAIs
403 * connected to a single CPU DAI, use CPU DAI's directly and let
404 * channel allocation be fixed up later
405 */
406 if (rtd->num_codecs > 1) {
407 chan_min = cpu_stream->channels_min;
408 chan_max = cpu_stream->channels_max;
409 }
410
411 hw->channels_min = max(chan_min, cpu_stream->channels_min);
412 hw->channels_max = min(chan_max, cpu_stream->channels_max);
413 if (hw->formats)
414 hw->formats &= formats & cpu_stream->formats;
415 else
416 hw->formats = formats & cpu_stream->formats;
417 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
78e45c99
LPC		 418
419 snd_pcm_limit_hw_rates(runtime);
420
421 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
2e5894d7 422 hw->rate_min = max(hw->rate_min, rate_min);
78e45c99 423 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
2e5894d7 424 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
bd477c31
LPC		 425}
426
e7ecfdb7
KM		 427static int soc_pcm_components_open(struct snd_pcm_substream *substream,
428 struct snd_soc_component **last)
429{
430 struct snd_soc_pcm_runtime *rtd = substream->private_data;
431 struct snd_soc_rtdcom_list *rtdcom;
432 struct snd_soc_component *component;
433 int ret = 0;
434
2b544dd7 435 for_each_rtd_components(rtd, rtdcom, component) {
e7ecfdb7
KM		 436 *last = component;
437
4a81e8f3
KM		 438 ret = snd_soc_component_module_get_when_open(component);
439 if (ret < 0) {
e7ecfdb7
KM		 440 dev_err(component->dev,
441 "ASoC: can't get module %s\n",
442 component->name);
4a81e8f3 443 return ret;
e7ecfdb7
KM		 444 }
445
ae2f4849 446 ret = snd_soc_component_open(component, substream);
e7ecfdb7
KM		 447 if (ret < 0) {
448 dev_err(component->dev,
449 "ASoC: can't open component %s: %d\n",
450 component->name, ret);
451 return ret;
452 }
453 }
454 *last = NULL;
455 return 0;
456}
457
244e2936
CK		 458static int soc_pcm_components_close(struct snd_pcm_substream *substream,
459 struct snd_soc_component *last)
460{
461 struct snd_soc_pcm_runtime *rtd = substream->private_data;
462 struct snd_soc_rtdcom_list *rtdcom;
463 struct snd_soc_component *component;
3672beb8 464 int ret = 0;
244e2936 465
2b544dd7 466 for_each_rtd_components(rtd, rtdcom, component) {
244e2936
CK		 467 if (component == last)
468 break;
469
3672beb8 470 ret |= snd_soc_component_close(component, substream);
4a81e8f3 471 snd_soc_component_module_put_when_close(component);
244e2936
CK		 472 }
473
3672beb8 474 return ret;
244e2936
CK		 475}
476
ddee627c
LG		 477/*
478 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
479 * then initialized and any private data can be allocated. This also calls
ef050bec 480 * startup for the cpu DAI, component, machine and codec DAI.
ddee627c
LG		 481 */
482static int soc_pcm_open(struct snd_pcm_substream *substream)
483{
484 struct snd_soc_pcm_runtime *rtd = substream->private_data;
485 struct snd_pcm_runtime *runtime = substream->runtime;
90be711e
KM		 486 struct snd_soc_component *component;
487 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 489 struct snd_soc_dai *codec_dai;
490 const char *codec_dai_name = "multicodec";
244e2936 491 int i, ret = 0;
ddee627c 492
988e8cc4 493 pinctrl_pm_select_default_state(cpu_dai->dev);
0b7990e3
KM		 494 for_each_rtd_codec_dai(rtd, i, codec_dai)
495 pinctrl_pm_select_default_state(codec_dai->dev);
90be711e 496
2b544dd7 497 for_each_rtd_components(rtd, rtdcom, component) {
90be711e
KM		 498 pm_runtime_get_sync(component->dev);
499 }
d6652ef8 500
72b745e3 501 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c
LG		 502
503 /* startup the audio subsystem */
5a52a045
KM		 504 ret = snd_soc_dai_startup(cpu_dai, substream);
505 if (ret < 0) {
506 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
507 cpu_dai->name, ret);
508 goto out;
ddee627c
LG		 509 }
510
e7ecfdb7
KM		 511 ret = soc_pcm_components_open(substream, &component);
512 if (ret < 0)
513 goto component_err;
b8135864 514
0b7990e3 515 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5a52a045
KM		 516 ret = snd_soc_dai_startup(codec_dai, substream);
517 if (ret < 0) {
518 dev_err(codec_dai->dev,
519 "ASoC: can't open codec %s: %d\n",
520 codec_dai->name, ret);
521 goto codec_dai_err;
ddee627c 522 }
2e5894d7
BC		 523
524 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
525 codec_dai->tx_mask = 0;
526 else
527 codec_dai->rx_mask = 0;
ddee627c
LG		 528 }
529
75ab9eb6 530 if (rtd->dai_link->ops->startup) {
ddee627c
LG		 531 ret = rtd->dai_link->ops->startup(substream);
532 if (ret < 0) {
103d84a3 533 pr_err("ASoC: %s startup failed: %d\n",
25bfe662 534 rtd->dai_link->name, ret);
ddee627c
LG		 535 goto machine_err;
536 }
537 }
538
01d7584c
LG		 539 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
540 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
541 goto dynamic;
542
ddee627c 543 /* Check that the codec and cpu DAIs are compatible */
2e5894d7
BC		 544 soc_pcm_init_runtime_hw(substream);
545
546 if (rtd->num_codecs == 1)
547 codec_dai_name = rtd->codec_dai->name;
ddee627c 548
62e5f676
LPC		 549 if (soc_pcm_has_symmetry(substream))
550 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
551
ddee627c 552 ret = -EINVAL;
ddee627c 553 if (!runtime->hw.rates) {
103d84a3 554 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
2e5894d7 555 codec_dai_name, cpu_dai->name);
ddee627c
LG		 556 goto config_err;
557 }
558 if (!runtime->hw.formats) {
103d84a3 559 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
2e5894d7 560 codec_dai_name, cpu_dai->name);
ddee627c
LG		 561 goto config_err;
562 }
563 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
564 runtime->hw.channels_min > runtime->hw.channels_max) {
103d84a3 565 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
2e5894d7 566 codec_dai_name, cpu_dai->name);
ddee627c
LG		 567 goto config_err;
568 }
569
c8dd1fec 570 soc_pcm_apply_msb(substream);
58ba9b25 571
ddee627c 572 /* Symmetry only applies if we've already got an active stream. */
17841020
DA		 573 if (cpu_dai->active) {
574 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
575 if (ret != 0)
576 goto config_err;
577 }
578
0b7990e3
KM		 579 for_each_rtd_codec_dai(rtd, i, codec_dai) {
580 if (codec_dai->active) {
581 ret = soc_pcm_apply_symmetry(substream, codec_dai);
2e5894d7
BC		 582 if (ret != 0)
583 goto config_err;
584 }
ddee627c
LG		 585 }
586
103d84a3 587 pr_debug("ASoC: %s <-> %s info:\n",
2e5894d7 588 codec_dai_name, cpu_dai->name);
103d84a3
LG		 589 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
590 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
ddee627c 591 runtime->hw.channels_max);
103d84a3 592 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
ddee627c
LG		 593 runtime->hw.rate_max);
594
01d7584c 595dynamic:
24894b76
LPC		 596
597 snd_soc_runtime_activate(rtd, substream->stream);
598
72b745e3 599 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 600 return 0;
601
602config_err:
75ab9eb6 603 if (rtd->dai_link->ops->shutdown)
ddee627c
LG		 604 rtd->dai_link->ops->shutdown(substream);
605
606machine_err:
2e5894d7 607 i = rtd->num_codecs;
ddee627c
LG		 608
609codec_dai_err:
330fcb51
KM		 610 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
611 snd_soc_dai_shutdown(codec_dai, substream);
2e5894d7 612
b8135864 613component_err:
244e2936 614 soc_pcm_components_close(substream, component);
e7ecfdb7 615
330fcb51 616 snd_soc_dai_shutdown(cpu_dai, substream);
ddee627c 617out:
72b745e3 618 mutex_unlock(&rtd->card->pcm_mutex);
d6652ef8 619
2b544dd7 620 for_each_rtd_components(rtd, rtdcom, component) {
90be711e
KM		 621 pm_runtime_mark_last_busy(component->dev);
622 pm_runtime_put_autosuspend(component->dev);
3f809783
SK		 623 }
624
0b7990e3
KM		 625 for_each_rtd_codec_dai(rtd, i, codec_dai) {
626 if (!codec_dai->active)
627 pinctrl_pm_select_sleep_state(codec_dai->dev);
2e5894d7 628 }
988e8cc4
NC		 629 if (!cpu_dai->active)
630 pinctrl_pm_select_sleep_state(cpu_dai->dev);
d6652ef8 631
ddee627c
LG		 632 return ret;
633}
634
635/*
636 * Power down the audio subsystem pmdown_time msecs after close is called.
637 * This is to ensure there are no pops or clicks in between any music tracks
638 * due to DAPM power cycling.
639 */
640static void close_delayed_work(struct work_struct *work)
641{
642 struct snd_soc_pcm_runtime *rtd =
643 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
2e5894d7 644 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
ddee627c 645
72b745e3 646 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 647
103d84a3 648 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
ddee627c
LG		 649 codec_dai->driver->playback.stream_name,
650 codec_dai->playback_active ? "active" : "inactive",
9bffb1fb 651 rtd->pop_wait ? "yes" : "no");
ddee627c
LG		 652
653 /* are we waiting on this codec DAI stream */
9bffb1fb
MLC		 654 if (rtd->pop_wait == 1) {
655 rtd->pop_wait = 0;
7bd3a6f3 656 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
d9b0951b 657 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 658 }
659
72b745e3 660 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 661}
662
a342031c
JB		 663static void codec2codec_close_delayed_work(struct work_struct *work)
664{
665 /*
666 * Currently nothing to do for c2c links
667 * Since c2c links are internal nodes in the DAPM graph and
668 * don't interface with the outside world or application layer
669 * we don't have to do any special handling on close.
670 */
671}
672
ddee627c
LG		 673/*
674 * Called by ALSA when a PCM substream is closed. Private data can be
ef050bec 675 * freed here. The cpu DAI, codec DAI, machine and components are also
ddee627c
LG		 676 * shutdown.
677 */
91d5e6b4 678static int soc_pcm_close(struct snd_pcm_substream *substream)
ddee627c
LG		 679{
680 struct snd_soc_pcm_runtime *rtd = substream->private_data;
90be711e
KM		 681 struct snd_soc_component *component;
682 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 683 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 684 struct snd_soc_dai *codec_dai;
685 int i;
ddee627c 686
72b745e3 687 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 688
24894b76 689 snd_soc_runtime_deactivate(rtd, substream->stream);
ddee627c 690
17841020
DA		 691 /* clear the corresponding DAIs rate when inactive */
692 if (!cpu_dai->active)
693 cpu_dai->rate = 0;
694
0b7990e3 695 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 696 if (!codec_dai->active)
697 codec_dai->rate = 0;
698 }
25b76791 699
ae11601b
RB		 700 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
701
330fcb51 702 snd_soc_dai_shutdown(cpu_dai, substream);
ddee627c 703
330fcb51
KM		 704 for_each_rtd_codec_dai(rtd, i, codec_dai)
705 snd_soc_dai_shutdown(codec_dai, substream);
ddee627c 706
75ab9eb6 707 if (rtd->dai_link->ops->shutdown)
ddee627c
LG		 708 rtd->dai_link->ops->shutdown(substream);
709
244e2936 710 soc_pcm_components_close(substream, NULL);
b8135864 711
ddee627c 712 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
208a1589 713 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
1d69c5c5
PU		 714 /* powered down playback stream now */
715 snd_soc_dapm_stream_event(rtd,
7bd3a6f3 716 SNDRV_PCM_STREAM_PLAYBACK,
7bd3a6f3 717 SND_SOC_DAPM_STREAM_STOP);
1d69c5c5
PU		 718 } else {
719 /* start delayed pop wq here for playback streams */
9bffb1fb 720 rtd->pop_wait = 1;
d4e1a73a
MB		 721 queue_delayed_work(system_power_efficient_wq,
722 &rtd->delayed_work,
723 msecs_to_jiffies(rtd->pmdown_time));
1d69c5c5 724 }
ddee627c
LG		 725 } else {
726 /* capture streams can be powered down now */
7bd3a6f3 727 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
d9b0951b 728 SND_SOC_DAPM_STREAM_STOP);
ddee627c
LG		 729 }
730
72b745e3 731 mutex_unlock(&rtd->card->pcm_mutex);
d6652ef8 732
2b544dd7 733 for_each_rtd_components(rtd, rtdcom, component) {
90be711e
KM		 734 pm_runtime_mark_last_busy(component->dev);
735 pm_runtime_put_autosuspend(component->dev);
3f809783
SK		 736 }
737
0b7990e3
KM		 738 for_each_rtd_codec_dai(rtd, i, codec_dai) {
739 if (!codec_dai->active)
740 pinctrl_pm_select_sleep_state(codec_dai->dev);
2e5894d7 741 }
988e8cc4
NC		 742 if (!cpu_dai->active)
743 pinctrl_pm_select_sleep_state(cpu_dai->dev);
d6652ef8 744
ddee627c
LG		 745 return 0;
746}
747
748/*
749 * Called by ALSA when the PCM substream is prepared, can set format, sample
750 * rate, etc. This function is non atomic and can be called multiple times,
751 * it can refer to the runtime info.
752 */
753static int soc_pcm_prepare(struct snd_pcm_substream *substream)
754{
755 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 756 struct snd_soc_component *component;
757 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 758 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 759 struct snd_soc_dai *codec_dai;
760 int i, ret = 0;
ddee627c 761
72b745e3 762 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 763
75ab9eb6 764 if (rtd->dai_link->ops->prepare) {
ddee627c
LG		 765 ret = rtd->dai_link->ops->prepare(substream);
766 if (ret < 0) {
103d84a3
LG		 767 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
768 " %d\n", ret);
ddee627c
LG		 769 goto out;
770 }
771 }
772
2b544dd7 773 for_each_rtd_components(rtd, rtdcom, component) {
6d537233 774 ret = snd_soc_component_prepare(component, substream);
b8135864
KM		 775 if (ret < 0) {
776 dev_err(component->dev,
777 "ASoC: platform prepare error: %d\n", ret);
778 goto out;
779 }
780 }
781
0b7990e3 782 for_each_rtd_codec_dai(rtd, i, codec_dai) {
4beb8e10 783 ret = snd_soc_dai_prepare(codec_dai, substream);
ddee627c 784 if (ret < 0) {
4beb8e10
KM		 785 dev_err(codec_dai->dev,
786 "ASoC: codec DAI prepare error: %d\n",
787 ret);
ddee627c
LG		 788 goto out;
789 }
790 }
791
4beb8e10
KM		 792 ret = snd_soc_dai_prepare(cpu_dai, substream);
793 if (ret < 0) {
794 dev_err(cpu_dai->dev,
795 "ASoC: cpu DAI prepare error: %d\n", ret);
796 goto out;
797 }
798
ddee627c
LG		 799 /* cancel any delayed stream shutdown that is pending */
800 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
9bffb1fb
MLC		 801 rtd->pop_wait) {
802 rtd->pop_wait = 0;
ddee627c
LG		 803 cancel_delayed_work(&rtd->delayed_work);
804 }
805
d9b0951b
LG		 806 snd_soc_dapm_stream_event(rtd, substream->stream,
807 SND_SOC_DAPM_STREAM_START);
ddee627c 808
0b7990e3
KM		 809 for_each_rtd_codec_dai(rtd, i, codec_dai)
810 snd_soc_dai_digital_mute(codec_dai, 0,
2e5894d7 811 substream->stream);
ae11601b 812 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
ddee627c
LG		 813
814out:
72b745e3 815 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 816 return ret;
817}
818
2e5894d7
BC		 819static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
820 unsigned int mask)
821{
822 struct snd_interval *interval;
823 int channels = hweight_long(mask);
824
825 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
826 interval->min = channels;
827 interval->max = channels;
828}
829
244e2936
CK		 830static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
831 struct snd_soc_component *last)
832{
833 struct snd_soc_pcm_runtime *rtd = substream->private_data;
834 struct snd_soc_rtdcom_list *rtdcom;
835 struct snd_soc_component *component;
eae7136a 836 int ret = 0;
244e2936 837
2b544dd7 838 for_each_rtd_components(rtd, rtdcom, component) {
244e2936
CK		 839 if (component == last)
840 break;
841
eae7136a 842 ret |= snd_soc_component_hw_free(component, substream);
244e2936
CK		 843 }
844
eae7136a 845 return ret;
244e2936
CK		 846}
847
ddee627c
LG		 848/*
849 * Called by ALSA when the hardware params are set by application. This
850 * function can also be called multiple times and can allocate buffers
851 * (using snd_pcm_lib_* ). It's non-atomic.
852 */
853static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
854 struct snd_pcm_hw_params *params)
855{
856 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 857 struct snd_soc_component *component;
858 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 859 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
0b7990e3 860 struct snd_soc_dai *codec_dai;
244e2936 861 int i, ret = 0;
ddee627c 862
72b745e3 863 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
75ab9eb6 864 if (rtd->dai_link->ops->hw_params) {
ddee627c
LG		 865 ret = rtd->dai_link->ops->hw_params(substream, params);
866 if (ret < 0) {
103d84a3
LG		 867 dev_err(rtd->card->dev, "ASoC: machine hw_params"
868 " failed: %d\n", ret);
ddee627c
LG		 869 goto out;
870 }
871 }
872
0b7990e3 873 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 874 struct snd_pcm_hw_params codec_params;
875
cde79035
RW		 876 /*
877 * Skip CODECs which don't support the current stream type,
878 * the idea being that if a CODEC is not used for the currently
879 * set up transfer direction, it should not need to be
880 * configured, especially since the configuration used might
881 * not even be supported by that CODEC. There may be cases
882 * however where a CODEC needs to be set up although it is
883 * actually not being used for the transfer, e.g. if a
884 * capture-only CODEC is acting as an LRCLK and/or BCLK master
885 * for the DAI link including a playback-only CODEC.
886 * If this becomes necessary, we will have to augment the
887 * machine driver setup with information on how to act, so
888 * we can do the right thing here.
889 */
890 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
891 continue;
892
2e5894d7
BC		 893 /* copy params for each codec */
894 codec_params = *params;
895
896 /* fixup params based on TDM slot masks */
570f18b6
RW		 897 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
898 codec_dai->tx_mask)
2e5894d7
BC		 899 soc_pcm_codec_params_fixup(&codec_params,
900 codec_dai->tx_mask);
570f18b6
RW		 901
902 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
903 codec_dai->rx_mask)
2e5894d7
BC		 904 soc_pcm_codec_params_fixup(&codec_params,
905 codec_dai->rx_mask);
906
aa6166c2
KM		 907 ret = snd_soc_dai_hw_params(codec_dai, substream,
908 &codec_params);
93e6958a 909 if(ret < 0)
ddee627c 910 goto codec_err;
ddee627c 911
2e5894d7
BC		 912 codec_dai->rate = params_rate(&codec_params);
913 codec_dai->channels = params_channels(&codec_params);
914 codec_dai->sample_bits = snd_pcm_format_physical_width(
915 params_format(&codec_params));
078a85f2
CK		 916
917 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
ddee627c
LG		 918 }
919
aa6166c2 920 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
93e6958a
BC		 921 if (ret < 0)
922 goto interface_err;
ddee627c 923
ca58221d
KM		 924 /* store the parameters for each DAIs */
925 cpu_dai->rate = params_rate(params);
926 cpu_dai->channels = params_channels(params);
927 cpu_dai->sample_bits =
928 snd_pcm_format_physical_width(params_format(params));
929
930 snd_soc_dapm_update_dai(substream, params, cpu_dai);
931
2b544dd7 932 for_each_rtd_components(rtd, rtdcom, component) {
245c539a 933 ret = snd_soc_component_hw_params(component, substream, params);
244e2936 934 if (ret < 0) {
b8135864
KM		 935 dev_err(component->dev,
936 "ASoC: %s hw params failed: %d\n",
244e2936
CK		 937 component->name, ret);
938 goto component_err;
b8135864
KM		 939 }
940 }
244e2936 941 component = NULL;
b8135864 942
957ce0c6 943 ret = soc_pcm_params_symmetry(substream, params);
944 if (ret)
b8135864 945 goto component_err;
ddee627c 946out:
72b745e3 947 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 948 return ret;
949
b8135864 950component_err:
244e2936 951 soc_pcm_components_hw_free(substream, component);
b8135864 952
846faaed 953 snd_soc_dai_hw_free(cpu_dai, substream);
2371abdc 954 cpu_dai->rate = 0;
ddee627c
LG		 955
956interface_err:
2e5894d7 957 i = rtd->num_codecs;
ddee627c
LG		 958
959codec_err:
6d11b128 960 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
f47b9ad9
JB		 961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
962 continue;
963
846faaed 964 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7
BC		 965 codec_dai->rate = 0;
966 }
967
75ab9eb6 968 if (rtd->dai_link->ops->hw_free)
ddee627c
LG		 969 rtd->dai_link->ops->hw_free(substream);
970
72b745e3 971 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 972 return ret;
973}
974
975/*
976 * Frees resources allocated by hw_params, can be called multiple times
977 */
978static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
979{
980 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 981 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 982 struct snd_soc_dai *codec_dai;
7f62b6ee 983 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
2e5894d7 984 int i;
ddee627c 985
72b745e3 986 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
ddee627c 987
d3383420
NC		 988 /* clear the corresponding DAIs parameters when going to be inactive */
989 if (cpu_dai->active == 1) {
990 cpu_dai->rate = 0;
991 cpu_dai->channels = 0;
992 cpu_dai->sample_bits = 0;
993 }
994
0b7990e3 995 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2e5894d7
BC		 996 if (codec_dai->active == 1) {
997 codec_dai->rate = 0;
998 codec_dai->channels = 0;
999 codec_dai->sample_bits = 0;
1000 }
d3383420
NC		 1001 }
1002
ddee627c 1003 /* apply codec digital mute */
0b7990e3
KM		 1004 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1005 if ((playback && codec_dai->playback_active == 1) ||
1006 (!playback && codec_dai->capture_active == 1))
1007 snd_soc_dai_digital_mute(codec_dai, 1,
2e5894d7
BC		 1008 substream->stream);
1009 }
ddee627c
LG		 1010
1011 /* free any machine hw params */
75ab9eb6 1012 if (rtd->dai_link->ops->hw_free)
ddee627c
LG		 1013 rtd->dai_link->ops->hw_free(substream);
1014
b8135864 1015 /* free any component resources */
244e2936 1016 soc_pcm_components_hw_free(substream, NULL);
b8135864 1017
ddee627c 1018 /* now free hw params for the DAIs */
0b7990e3 1019 for_each_rtd_codec_dai(rtd, i, codec_dai) {
f47b9ad9
JB		 1020 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1021 continue;
1022
846faaed 1023 snd_soc_dai_hw_free(codec_dai, substream);
2e5894d7 1024 }
ddee627c 1025
846faaed 1026 snd_soc_dai_hw_free(cpu_dai, substream);
ddee627c 1027
72b745e3 1028 mutex_unlock(&rtd->card->pcm_mutex);
ddee627c
LG		 1029 return 0;
1030}
1031
4378f1fb 1032static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
ddee627c
LG		 1033{
1034 struct snd_soc_pcm_runtime *rtd = substream->private_data;
b8135864
KM		 1035 struct snd_soc_component *component;
1036 struct snd_soc_rtdcom_list *rtdcom;
ddee627c 1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 1038 struct snd_soc_dai *codec_dai;
1039 int i, ret;
1040
4378f1fb
PU		 1041 if (rtd->dai_link->ops->trigger) {
1042 ret = rtd->dai_link->ops->trigger(substream, cmd);
95aef355
KM		 1043 if (ret < 0)
1044 return ret;
ddee627c
LG		 1045 }
1046
2b544dd7 1047 for_each_rtd_components(rtd, rtdcom, component) {
5693d50c 1048 ret = snd_soc_component_trigger(component, substream, cmd);
b8135864
KM		 1049 if (ret < 0)
1050 return ret;
1051 }
1052
901e822b 1053 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
95aef355
KM		 1054 if (ret < 0)
1055 return ret;
4792b0db 1056
4378f1fb
PU		 1057 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1059 if (ret < 0)
1060 return ret;
1061 }
1062
1063 return 0;
1064}
1065
1066static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1067{
1068 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1069 struct snd_soc_component *component;
1070 struct snd_soc_rtdcom_list *rtdcom;
1071 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1072 struct snd_soc_dai *codec_dai;
1073 int i, ret;
1074
1075 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1076 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1077 if (ret < 0)
1078 return ret;
1079 }
1080
1081 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1082 if (ret < 0)
1083 return ret;
1084
2b544dd7 1085 for_each_rtd_components(rtd, rtdcom, component) {
4378f1fb
PU		 1086 ret = snd_soc_component_trigger(component, substream, cmd);
1087 if (ret < 0)
1088 return ret;
1089 }
1090
75ab9eb6 1091 if (rtd->dai_link->ops->trigger) {
4792b0db
JN		 1092 ret = rtd->dai_link->ops->trigger(substream, cmd);
1093 if (ret < 0)
1094 return ret;
1095 }
1096
ddee627c
LG		 1097 return 0;
1098}
1099
4378f1fb
PU		 1100static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1101{
1102 int ret;
1103
1104 switch (cmd) {
1105 case SNDRV_PCM_TRIGGER_START:
1106 case SNDRV_PCM_TRIGGER_RESUME:
1107 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1108 ret = soc_pcm_trigger_start(substream, cmd);
1109 break;
1110 case SNDRV_PCM_TRIGGER_STOP:
1111 case SNDRV_PCM_TRIGGER_SUSPEND:
1112 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1113 ret = soc_pcm_trigger_stop(substream, cmd);
1114 break;
1115 default:
1116 return -EINVAL;
1117 }
1118
1119 return ret;
1120}
1121
45c0a188
MB		 1122static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1123 int cmd)
07bf84aa
LG		 1124{
1125 struct snd_soc_pcm_runtime *rtd = substream->private_data;
07bf84aa 1126 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7
BC		 1127 struct snd_soc_dai *codec_dai;
1128 int i, ret;
1129
0b7990e3 1130 for_each_rtd_codec_dai(rtd, i, codec_dai) {
5c0769af 1131 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
07bf84aa
LG		 1132 if (ret < 0)
1133 return ret;
1134 }
5c0769af 1135
901e822b 1136 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
5c0769af
KM		 1137 if (ret < 0)
1138 return ret;
1139
07bf84aa
LG		 1140 return 0;
1141}
ddee627c
LG		 1142/*
1143 * soc level wrapper for pointer callback
ef050bec 1144 * If cpu_dai, codec_dai, component driver has the delay callback, then
ddee627c
LG		 1145 * the runtime->delay will be updated accordingly.
1146 */
1147static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1148{
1149 struct snd_soc_pcm_runtime *rtd = substream->private_data;
ddee627c 1150 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2e5894d7 1151 struct snd_soc_dai *codec_dai;
ddee627c
LG		 1152 struct snd_pcm_runtime *runtime = substream->runtime;
1153 snd_pcm_uframes_t offset = 0;
1154 snd_pcm_sframes_t delay = 0;
2e5894d7
BC		 1155 snd_pcm_sframes_t codec_delay = 0;
1156 int i;
ddee627c 1157
9fb4c2bf
AA		 1158 /* clearing the previous total delay */
1159 runtime->delay = 0;
1160
0035e256 1161 offset = snd_soc_pcm_component_pointer(substream);
b8135864 1162
9fb4c2bf
AA		 1163 /* base delay if assigned in pointer callback */
1164 delay = runtime->delay;
b8135864 1165
1dea80d4 1166 delay += snd_soc_dai_delay(cpu_dai, substream);
ddee627c 1167
0b7990e3 1168 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1dea80d4
KM		 1169 codec_delay = max(codec_delay,
1170 snd_soc_dai_delay(codec_dai, substream));
2e5894d7
BC		 1171 }
1172 delay += codec_delay;
ddee627c 1173
ddee627c
LG		 1174 runtime->delay = delay;
1175
1176 return offset;
1177}
1178
01d7584c
LG		 1179/* connect a FE and BE */
1180static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1181 struct snd_soc_pcm_runtime *be, int stream)
1182{
1183 struct snd_soc_dpcm *dpcm;
a9764869 1184 unsigned long flags;
0632fa04 1185 char *name;
01d7584c
LG		 1186
1187 /* only add new dpcms */
8d6258a4 1188 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1189 if (dpcm->be == be && dpcm->fe == fe)
1190 return 0;
1191 }
1192
1193 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1194 if (!dpcm)
1195 return -ENOMEM;
1196
1197 dpcm->be = be;
1198 dpcm->fe = fe;
1199 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1200 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
a9764869 1201 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1202 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1203 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
a9764869 1204 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c 1205
7cc302d2 1206 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
01d7584c
LG		 1207 stream ? "capture" : "playback", fe->dai_link->name,
1208 stream ? "<-" : "->", be->dai_link->name);
1209
f86dcef8 1210#ifdef CONFIG_DEBUG_FS
0632fa04
HG		 1211 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1212 stream ? "capture" : "playback");
1213 if (name) {
1214 dpcm->debugfs_state = debugfs_create_dir(name,
1215 fe->debugfs_dpcm_root);
1216 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1217 &dpcm->state);
1218 kfree(name);
1219 }
f86dcef8 1220#endif
01d7584c
LG		 1221 return 1;
1222}
1223
1224/* reparent a BE onto another FE */
1225static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1226 struct snd_soc_pcm_runtime *be, int stream)
1227{
1228 struct snd_soc_dpcm *dpcm;
1229 struct snd_pcm_substream *fe_substream, *be_substream;
1230
1231 /* reparent if BE is connected to other FEs */
1232 if (!be->dpcm[stream].users)
1233 return;
1234
1235 be_substream = snd_soc_dpcm_get_substream(be, stream);
1236
d2e24d64 1237 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 1238 if (dpcm->fe == fe)
1239 continue;
1240
7cc302d2 1241 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
01d7584c
LG		 1242 stream ? "capture" : "playback",
1243 dpcm->fe->dai_link->name,
1244 stream ? "<-" : "->", dpcm->be->dai_link->name);
1245
1246 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1247 be_substream->runtime = fe_substream->runtime;
1248 break;
1249 }
1250}
1251
1252/* disconnect a BE and FE */
23607025 1253void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1254{
1255 struct snd_soc_dpcm *dpcm, *d;
a9764869 1256 unsigned long flags;
01d7584c 1257
8d6258a4 1258 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
103d84a3 1259 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
01d7584c
LG		 1260 stream ? "capture" : "playback",
1261 dpcm->be->dai_link->name);
1262
1263 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1264 continue;
1265
7cc302d2 1266 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
01d7584c
LG		 1267 stream ? "capture" : "playback", fe->dai_link->name,
1268 stream ? "<-" : "->", dpcm->be->dai_link->name);
1269
1270 /* BEs still alive need new FE */
1271 dpcm_be_reparent(fe, dpcm->be, stream);
1272
f86dcef8 1273#ifdef CONFIG_DEBUG_FS
fee531d6 1274 debugfs_remove_recursive(dpcm->debugfs_state);
f86dcef8 1275#endif
a9764869 1276 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1277 list_del(&dpcm->list_be);
1278 list_del(&dpcm->list_fe);
a9764869 1279 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1280 kfree(dpcm);
1281 }
1282}
1283
1284/* get BE for DAI widget and stream */
1285static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1286 struct snd_soc_dapm_widget *widget, int stream)
1287{
1288 struct snd_soc_pcm_runtime *be;
7afecb30 1289 struct snd_soc_dai *dai;
1a497983 1290 int i;
01d7584c 1291
3c146465
LG		 1292 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1293
01d7584c 1294 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
bcb1fd1f 1295 for_each_card_rtds(card, be) {
01d7584c 1296
35ea0655
LG		 1297 if (!be->dai_link->no_pcm)
1298 continue;
1299
3c146465
LG		 1300 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1301 be->cpu_dai->playback_widget ?
1302 be->cpu_dai->playback_widget->name : "(not set)");
1303
2e5894d7 1304 if (be->cpu_dai->playback_widget == widget)
01d7584c 1305 return be;
2e5894d7 1306
7afecb30 1307 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 1308 if (dai->playback_widget == widget)
1309 return be;
1310 }
01d7584c
LG		 1311 }
1312 } else {
1313
bcb1fd1f 1314 for_each_card_rtds(card, be) {
01d7584c 1315
35ea0655
LG		 1316 if (!be->dai_link->no_pcm)
1317 continue;
1318
3c146465
LG		 1319 dev_dbg(card->dev, "ASoC: try BE %s\n",
1320 be->cpu_dai->capture_widget ?
1321 be->cpu_dai->capture_widget->name : "(not set)");
1322
2e5894d7 1323 if (be->cpu_dai->capture_widget == widget)
01d7584c 1324 return be;
2e5894d7 1325
7afecb30 1326 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 1327 if (dai->capture_widget == widget)
1328 return be;
1329 }
01d7584c
LG		 1330 }
1331 }
1332
3c146465 1333 /* dai link name and stream name set correctly ? */
103d84a3 1334 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
01d7584c
LG		 1335 stream ? "capture" : "playback", widget->name);
1336 return NULL;
1337}
1338
1339static inline struct snd_soc_dapm_widget *
37018610 1340 dai_get_widget(struct snd_soc_dai *dai, int stream)
01d7584c
LG		 1341{
1342 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
37018610 1343 return dai->playback_widget;
01d7584c 1344 else
37018610 1345 return dai->capture_widget;
01d7584c
LG		 1346}
1347
1348static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1349 struct snd_soc_dapm_widget *widget)
1350{
1351 int i;
1352
1353 for (i = 0; i < list->num_widgets; i++) {
1354 if (widget == list->widgets[i])
1355 return 1;
1356 }
1357
1358 return 0;
1359}
1360
5fdd022c
PS		 1361static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1362 enum snd_soc_dapm_direction dir)
1363{
1364 struct snd_soc_card *card = widget->dapm->card;
1365 struct snd_soc_pcm_runtime *rtd;
0b7990e3 1366 struct snd_soc_dai *dai;
5fdd022c
PS		 1367 int i;
1368
1369 if (dir == SND_SOC_DAPM_DIR_OUT) {
bcb1fd1f 1370 for_each_card_rtds(card, rtd) {
5fdd022c
PS		 1371 if (!rtd->dai_link->no_pcm)
1372 continue;
1373
1374 if (rtd->cpu_dai->playback_widget == widget)
1375 return true;
1376
0b7990e3 1377 for_each_rtd_codec_dai(rtd, i, dai) {
5fdd022c
PS		 1378 if (dai->playback_widget == widget)
1379 return true;
1380 }
1381 }
1382 } else { /* SND_SOC_DAPM_DIR_IN */
bcb1fd1f 1383 for_each_card_rtds(card, rtd) {
5fdd022c
PS		 1384 if (!rtd->dai_link->no_pcm)
1385 continue;
1386
1387 if (rtd->cpu_dai->capture_widget == widget)
1388 return true;
1389
0b7990e3 1390 for_each_rtd_codec_dai(rtd, i, dai) {
5fdd022c
PS		 1391 if (dai->capture_widget == widget)
1392 return true;
1393 }
1394 }
1395 }
1396
1397 return false;
1398}
1399
23607025 1400int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1ce43acf 1401 int stream, struct snd_soc_dapm_widget_list **list)
01d7584c
LG		 1402{
1403 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
01d7584c
LG		 1404 int paths;
1405
01d7584c 1406 /* get number of valid DAI paths and their widgets */
6742064a 1407 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
5fdd022c 1408 dpcm_end_walk_at_be);
01d7584c 1409
103d84a3 1410 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
01d7584c
LG		 1411 stream ? "capture" : "playback");
1412
01d7584c
LG		 1413 return paths;
1414}
1415
01d7584c
LG		 1416static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1417 struct snd_soc_dapm_widget_list **list_)
1418{
1419 struct snd_soc_dpcm *dpcm;
1420 struct snd_soc_dapm_widget_list *list = *list_;
1421 struct snd_soc_dapm_widget *widget;
7afecb30 1422 struct snd_soc_dai *dai;
01d7584c 1423 int prune = 0;
bed646dc 1424 int do_prune;
01d7584c
LG		 1425
1426 /* Destroy any old FE <--> BE connections */
8d6258a4 1427 for_each_dpcm_be(fe, stream, dpcm) {
2e5894d7 1428 unsigned int i;
01d7584c
LG		 1429
1430 /* is there a valid CPU DAI widget for this BE */
37018610 1431 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
01d7584c
LG		 1432
1433 /* prune the BE if it's no longer in our active list */
1434 if (widget && widget_in_list(list, widget))
1435 continue;
1436
1437 /* is there a valid CODEC DAI widget for this BE */
bed646dc 1438 do_prune = 1;
7afecb30 1439 for_each_rtd_codec_dai(dpcm->be, i, dai) {
2e5894d7 1440 widget = dai_get_widget(dai, stream);
01d7584c 1441
2e5894d7
BC		 1442 /* prune the BE if it's no longer in our active list */
1443 if (widget && widget_in_list(list, widget))
bed646dc 1444 do_prune = 0;
2e5894d7 1445 }
bed646dc
KM		 1446 if (!do_prune)
1447 continue;
01d7584c 1448
103d84a3 1449 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
01d7584c
LG		 1450 stream ? "capture" : "playback",
1451 dpcm->be->dai_link->name, fe->dai_link->name);
1452 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1453 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1454 prune++;
1455 }
1456
103d84a3 1457 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
01d7584c
LG		 1458 return prune;
1459}
1460
1461static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1462 struct snd_soc_dapm_widget_list **list_)
1463{
1464 struct snd_soc_card *card = fe->card;
1465 struct snd_soc_dapm_widget_list *list = *list_;
1466 struct snd_soc_pcm_runtime *be;
1467 int i, new = 0, err;
1468
1469 /* Create any new FE <--> BE connections */
1470 for (i = 0; i < list->num_widgets; i++) {
1471
4616274d
MB		 1472 switch (list->widgets[i]->id) {
1473 case snd_soc_dapm_dai_in:
c5b8540d
KC		 1474 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1475 continue;
1476 break;
4616274d 1477 case snd_soc_dapm_dai_out:
c5b8540d
KC		 1478 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1479 continue;
4616274d
MB		 1480 break;
1481 default:
01d7584c 1482 continue;
4616274d 1483 }
01d7584c
LG		 1484
1485 /* is there a valid BE rtd for this widget */
1486 be = dpcm_get_be(card, list->widgets[i], stream);
1487 if (!be) {
103d84a3 1488 dev_err(fe->dev, "ASoC: no BE found for %s\n",
01d7584c
LG		 1489 list->widgets[i]->name);
1490 continue;
1491 }
1492
1493 /* make sure BE is a real BE */
1494 if (!be->dai_link->no_pcm)
1495 continue;
1496
1497 /* don't connect if FE is not running */
23607025 1498 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
01d7584c
LG		 1499 continue;
1500
1501 /* newly connected FE and BE */
1502 err = dpcm_be_connect(fe, be, stream);
1503 if (err < 0) {
103d84a3 1504 dev_err(fe->dev, "ASoC: can't connect %s\n",
01d7584c
LG		 1505 list->widgets[i]->name);
1506 break;
1507 } else if (err == 0) /* already connected */
1508 continue;
1509
1510 /* new */
1511 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1512 new++;
1513 }
1514
103d84a3 1515 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
01d7584c
LG		 1516 return new;
1517}
1518
1519/*
1520 * Find the corresponding BE DAIs that source or sink audio to this
1521 * FE substream.
1522 */
23607025 1523int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
01d7584c
LG		 1524 int stream, struct snd_soc_dapm_widget_list **list, int new)
1525{
1526 if (new)
1527 return dpcm_add_paths(fe, stream, list);
1528 else
1529 return dpcm_prune_paths(fe, stream, list);
1530}
1531
23607025 1532void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1533{
1534 struct snd_soc_dpcm *dpcm;
a9764869 1535 unsigned long flags;
01d7584c 1536
a9764869 1537 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 1538 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 1539 dpcm->be->dpcm[stream].runtime_update =
1540 SND_SOC_DPCM_UPDATE_NO;
a9764869 1541 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 1542}
1543
1544static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1545 int stream)
1546{
1547 struct snd_soc_dpcm *dpcm;
1548
1549 /* disable any enabled and non active backends */
8d6258a4 1550 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1551
1552 struct snd_soc_pcm_runtime *be = dpcm->be;
1553 struct snd_pcm_substream *be_substream =
1554 snd_soc_dpcm_get_substream(be, stream);
1555
1556 if (be->dpcm[stream].users == 0)
103d84a3 1557 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1558 stream ? "capture" : "playback",
1559 be->dpcm[stream].state);
1560
1561 if (--be->dpcm[stream].users != 0)
1562 continue;
1563
1564 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1565 continue;
1566
1567 soc_pcm_close(be_substream);
1568 be_substream->runtime = NULL;
1569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1570 }
1571}
1572
23607025 1573int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1574{
1575 struct snd_soc_dpcm *dpcm;
1576 int err, count = 0;
1577
1578 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
8d6258a4 1579 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1580
1581 struct snd_soc_pcm_runtime *be = dpcm->be;
1582 struct snd_pcm_substream *be_substream =
1583 snd_soc_dpcm_get_substream(be, stream);
1584
2062b4c5
RKAL		 1585 if (!be_substream) {
1586 dev_err(be->dev, "ASoC: no backend %s stream\n",
1587 stream ? "capture" : "playback");
1588 continue;
1589 }
1590
01d7584c
LG		 1591 /* is this op for this BE ? */
1592 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1593 continue;
1594
1595 /* first time the dpcm is open ? */
1596 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
103d84a3 1597 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
01d7584c
LG		 1598 stream ? "capture" : "playback",
1599 be->dpcm[stream].state);
1600
1601 if (be->dpcm[stream].users++ != 0)
1602 continue;
1603
1604 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1605 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1606 continue;
1607
2062b4c5
RKAL		 1608 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1609 stream ? "capture" : "playback", be->dai_link->name);
01d7584c
LG		 1610
1611 be_substream->runtime = be->dpcm[stream].runtime;
1612 err = soc_pcm_open(be_substream);
1613 if (err < 0) {
103d84a3 1614 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
01d7584c
LG		 1615 be->dpcm[stream].users--;
1616 if (be->dpcm[stream].users < 0)
103d84a3 1617 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
01d7584c
LG		 1618 stream ? "capture" : "playback",
1619 be->dpcm[stream].state);
1620
1621 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1622 goto unwind;
1623 }
1624
1625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1626 count++;
1627 }
1628
1629 return count;
1630
1631unwind:
1632 /* disable any enabled and non active backends */
8d6258a4 1633 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 1634 struct snd_soc_pcm_runtime *be = dpcm->be;
1635 struct snd_pcm_substream *be_substream =
1636 snd_soc_dpcm_get_substream(be, stream);
1637
1638 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1639 continue;
1640
1641 if (be->dpcm[stream].users == 0)
103d84a3 1642 dev_err(be->dev, "ASoC: no users %s at close %d\n",
01d7584c
LG		 1643 stream ? "capture" : "playback",
1644 be->dpcm[stream].state);
1645
1646 if (--be->dpcm[stream].users != 0)
1647 continue;
1648
1649 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1650 continue;
1651
1652 soc_pcm_close(be_substream);
1653 be_substream->runtime = NULL;
1654 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1655 }
1656
1657 return err;
1658}
1659
08ae9b45 1660static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
435ffb76 1661 struct snd_soc_pcm_stream *stream)
08ae9b45
LPC		 1662{
1663 runtime->hw.rate_min = stream->rate_min;
e33ffbd9 1664 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
08ae9b45
LPC		 1665 runtime->hw.channels_min = stream->channels_min;
1666 runtime->hw.channels_max = stream->channels_max;
002220a9 1667 if (runtime->hw.formats)
435ffb76 1668 runtime->hw.formats &= stream->formats;
002220a9 1669 else
435ffb76 1670 runtime->hw.formats = stream->formats;
08ae9b45
LPC		 1671 runtime->hw.rates = stream->rates;
1672}
1673
435ffb76
JB		 1674static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1675 u64 *formats)
b073ed4e
KM		 1676{
1677 struct snd_soc_pcm_runtime *fe = substream->private_data;
1678 struct snd_soc_dpcm *dpcm;
7afecb30 1679 struct snd_soc_dai *dai;
b073ed4e
KM		 1680 int stream = substream->stream;
1681
1682 if (!fe->dai_link->dpcm_merged_format)
435ffb76 1683 return;
b073ed4e
KM		 1684
1685 /*
1686 * It returns merged BE codec format
1687 * if FE want to use it (= dpcm_merged_format)
1688 */
1689
8d6258a4 1690 for_each_dpcm_be(fe, stream, dpcm) {
b073ed4e
KM		 1691 struct snd_soc_pcm_runtime *be = dpcm->be;
1692 struct snd_soc_dai_driver *codec_dai_drv;
1693 struct snd_soc_pcm_stream *codec_stream;
1694 int i;
1695
7afecb30 1696 for_each_rtd_codec_dai(be, i, dai) {
4febced1
JB		 1697 /*
1698 * Skip CODECs which don't support the current stream
1699 * type. See soc_pcm_init_runtime_hw() for more details
1700 */
7afecb30 1701 if (!snd_soc_dai_stream_valid(dai, stream))
4febced1
JB		 1702 continue;
1703
7afecb30 1704 codec_dai_drv = dai->driver;
b073ed4e
KM		 1705 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1706 codec_stream = &codec_dai_drv->playback;
1707 else
1708 codec_stream = &codec_dai_drv->capture;
1709
435ffb76 1710 *formats &= codec_stream->formats;
b073ed4e
KM		 1711 }
1712 }
b073ed4e
KM		 1713}
1714
435ffb76
JB		 1715static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1716 unsigned int *channels_min,
1717 unsigned int *channels_max)
f4c277b8
JW		 1718{
1719 struct snd_soc_pcm_runtime *fe = substream->private_data;
1720 struct snd_soc_dpcm *dpcm;
1721 int stream = substream->stream;
1722
1723 if (!fe->dai_link->dpcm_merged_chan)
1724 return;
1725
f4c277b8
JW		 1726 /*
1727 * It returns merged BE codec channel;
1728 * if FE want to use it (= dpcm_merged_chan)
1729 */
1730
8d6258a4 1731 for_each_dpcm_be(fe, stream, dpcm) {
f4c277b8 1732 struct snd_soc_pcm_runtime *be = dpcm->be;
4f2bd18b 1733 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
f4c277b8
JW		 1734 struct snd_soc_dai_driver *codec_dai_drv;
1735 struct snd_soc_pcm_stream *codec_stream;
4f2bd18b
JB		 1736 struct snd_soc_pcm_stream *cpu_stream;
1737
1738 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1739 cpu_stream = &cpu_dai_drv->playback;
1740 else
1741 cpu_stream = &cpu_dai_drv->capture;
1742
1743 *channels_min = max(*channels_min, cpu_stream->channels_min);
1744 *channels_max = min(*channels_max, cpu_stream->channels_max);
1745
1746 /*
1747 * chan min/max cannot be enforced if there are multiple CODEC
1748 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1749 */
1750 if (be->num_codecs == 1) {
1751 codec_dai_drv = be->codec_dais[0]->driver;
f4c277b8 1752
f4c277b8
JW		 1753 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1754 codec_stream = &codec_dai_drv->playback;
1755 else
1756 codec_stream = &codec_dai_drv->capture;
1757
1758 *channels_min = max(*channels_min,
1759 codec_stream->channels_min);
1760 *channels_max = min(*channels_max,
1761 codec_stream->channels_max);
1762 }
1763 }
1764}
1765
baacd8d1
JB		 1766static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1767 unsigned int *rates,
1768 unsigned int *rate_min,
1769 unsigned int *rate_max)
1770{
1771 struct snd_soc_pcm_runtime *fe = substream->private_data;
1772 struct snd_soc_dpcm *dpcm;
1773 int stream = substream->stream;
1774
1775 if (!fe->dai_link->dpcm_merged_rate)
1776 return;
1777
1778 /*
1779 * It returns merged BE codec channel;
1780 * if FE want to use it (= dpcm_merged_chan)
1781 */
1782
8d6258a4 1783 for_each_dpcm_be(fe, stream, dpcm) {
baacd8d1
JB		 1784 struct snd_soc_pcm_runtime *be = dpcm->be;
1785 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1786 struct snd_soc_dai_driver *codec_dai_drv;
1787 struct snd_soc_pcm_stream *codec_stream;
1788 struct snd_soc_pcm_stream *cpu_stream;
7afecb30 1789 struct snd_soc_dai *dai;
baacd8d1
JB		 1790 int i;
1791
1792 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1793 cpu_stream = &cpu_dai_drv->playback;
1794 else
1795 cpu_stream = &cpu_dai_drv->capture;
1796
1797 *rate_min = max(*rate_min, cpu_stream->rate_min);
1798 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1799 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1800
7afecb30 1801 for_each_rtd_codec_dai(be, i, dai) {
baacd8d1
JB		 1802 /*
1803 * Skip CODECs which don't support the current stream
1804 * type. See soc_pcm_init_runtime_hw() for more details
1805 */
7afecb30 1806 if (!snd_soc_dai_stream_valid(dai, stream))
baacd8d1
JB		 1807 continue;
1808
7afecb30 1809 codec_dai_drv = dai->driver;
baacd8d1
JB		 1810 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1811 codec_stream = &codec_dai_drv->playback;
1812 else
1813 codec_stream = &codec_dai_drv->capture;
1814
1815 *rate_min = max(*rate_min, codec_stream->rate_min);
1816 *rate_max = min_not_zero(*rate_max,
1817 codec_stream->rate_max);
1818 *rates = snd_pcm_rate_mask_intersect(*rates,
1819 codec_stream->rates);
1820 }
1821 }
1822}
1823
45c0a188 1824static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
01d7584c
LG		 1825{
1826 struct snd_pcm_runtime *runtime = substream->runtime;
1827 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1828 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1829 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1830
08ae9b45 1831 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435ffb76 1832 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
08ae9b45 1833 else
435ffb76 1834 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
f4c277b8 1835
435ffb76
JB		 1836 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1837 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1838 &runtime->hw.channels_max);
baacd8d1
JB		 1839 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1840 &runtime->hw.rate_min, &runtime->hw.rate_max);
01d7584c
LG		 1841}
1842
ea9d0d77
TI		 1843static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1844
1845/* Set FE's runtime_update state; the state is protected via PCM stream lock
1846 * for avoiding the race with trigger callback.
1847 * If the state is unset and a trigger is pending while the previous operation,
1848 * process the pending trigger action here.
1849 */
1850static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1851 int stream, enum snd_soc_dpcm_update state)
1852{
1853 struct snd_pcm_substream *substream =
1854 snd_soc_dpcm_get_substream(fe, stream);
1855
1856 snd_pcm_stream_lock_irq(substream);
1857 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1858 dpcm_fe_dai_do_trigger(substream,
1859 fe->dpcm[stream].trigger_pending - 1);
1860 fe->dpcm[stream].trigger_pending = 0;
1861 }
1862 fe->dpcm[stream].runtime_update = state;
1863 snd_pcm_stream_unlock_irq(substream);
1864}
1865
906c7d69
PL		 1866static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1867 int stream)
1868{
1869 struct snd_soc_dpcm *dpcm;
1870 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1871 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1872 int err;
1873
1874 /* apply symmetry for FE */
1875 if (soc_pcm_has_symmetry(fe_substream))
1876 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1877
1878 /* Symmetry only applies if we've got an active stream. */
1879 if (fe_cpu_dai->active) {
1880 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1881 if (err < 0)
1882 return err;
1883 }
1884
1885 /* apply symmetry for BE */
8d6258a4 1886 for_each_dpcm_be(fe, stream, dpcm) {
906c7d69
PL		 1887 struct snd_soc_pcm_runtime *be = dpcm->be;
1888 struct snd_pcm_substream *be_substream =
1889 snd_soc_dpcm_get_substream(be, stream);
6246f283 1890 struct snd_soc_pcm_runtime *rtd;
0b7990e3 1891 struct snd_soc_dai *codec_dai;
906c7d69
PL		 1892 int i;
1893
6246f283
JB		 1894 /* A backend may not have the requested substream */
1895 if (!be_substream)
1896 continue;
1897
1898 rtd = be_substream->private_data;
f1176614
JK		 1899 if (rtd->dai_link->be_hw_params_fixup)
1900 continue;
1901
906c7d69
PL		 1902 if (soc_pcm_has_symmetry(be_substream))
1903 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1904
1905 /* Symmetry only applies if we've got an active stream. */
1906 if (rtd->cpu_dai->active) {
99bcedbd
KCC		 1907 err = soc_pcm_apply_symmetry(fe_substream,
1908 rtd->cpu_dai);
906c7d69
PL		 1909 if (err < 0)
1910 return err;
1911 }
1912
0b7990e3
KM		 1913 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1914 if (codec_dai->active) {
99bcedbd 1915 err = soc_pcm_apply_symmetry(fe_substream,
0b7990e3 1916 codec_dai);
906c7d69
PL		 1917 if (err < 0)
1918 return err;
1919 }
1920 }
1921 }
1922
1923 return 0;
1924}
1925
01d7584c
LG		 1926static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1927{
1928 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1929 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1930 int stream = fe_substream->stream, ret = 0;
1931
ea9d0d77 1932 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1933
1934 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1935 if (ret < 0) {
103d84a3 1936 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
01d7584c
LG		 1937 goto be_err;
1938 }
1939
103d84a3 1940 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
01d7584c
LG		 1941
1942 /* start the DAI frontend */
1943 ret = soc_pcm_open(fe_substream);
1944 if (ret < 0) {
103d84a3 1945 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
01d7584c
LG		 1946 goto unwind;
1947 }
1948
1949 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1950
1951 dpcm_set_fe_runtime(fe_substream);
1952 snd_pcm_limit_hw_rates(runtime);
1953
906c7d69
PL		 1954 ret = dpcm_apply_symmetry(fe_substream, stream);
1955 if (ret < 0) {
1956 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1957 ret);
1958 goto unwind;
1959 }
1960
ea9d0d77 1961 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1962 return 0;
1963
1964unwind:
1965 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1966be_err:
ea9d0d77 1967 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1968 return ret;
1969}
1970
23607025 1971int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1972{
1973 struct snd_soc_dpcm *dpcm;
1974
1975 /* only shutdown BEs that are either sinks or sources to this FE DAI */
8d6258a4 1976 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1977
1978 struct snd_soc_pcm_runtime *be = dpcm->be;
1979 struct snd_pcm_substream *be_substream =
1980 snd_soc_dpcm_get_substream(be, stream);
1981
1982 /* is this op for this BE ? */
1983 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1984 continue;
1985
1986 if (be->dpcm[stream].users == 0)
103d84a3 1987 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1988 stream ? "capture" : "playback",
1989 be->dpcm[stream].state);
1990
1991 if (--be->dpcm[stream].users != 0)
1992 continue;
1993
1994 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
9c0ac70a
KCC		 1995 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1996 soc_pcm_hw_free(be_substream);
1997 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1998 }
01d7584c 1999
103d84a3 2000 dev_dbg(be->dev, "ASoC: close BE %s\n",
94d215cc 2001 be->dai_link->name);
01d7584c
LG		 2002
2003 soc_pcm_close(be_substream);
2004 be_substream->runtime = NULL;
2005
2006 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2007 }
2008 return 0;
2009}
2010
2011static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2012{
2013 struct snd_soc_pcm_runtime *fe = substream->private_data;
2014 int stream = substream->stream;
2015
ea9d0d77 2016 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2017
2018 /* shutdown the BEs */
2019 dpcm_be_dai_shutdown(fe, substream->stream);
2020
103d84a3 2021 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
01d7584c
LG		 2022
2023 /* now shutdown the frontend */
2024 soc_pcm_close(substream);
2025
2026 /* run the stream event for each BE */
2027 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2028
2029 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
ea9d0d77 2030 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2031 return 0;
2032}
2033
23607025 2034int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2035{
2036 struct snd_soc_dpcm *dpcm;
2037
2038 /* only hw_params backends that are either sinks or sources
2039 * to this frontend DAI */
8d6258a4 2040 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2041
2042 struct snd_soc_pcm_runtime *be = dpcm->be;
2043 struct snd_pcm_substream *be_substream =
2044 snd_soc_dpcm_get_substream(be, stream);
2045
2046 /* is this op for this BE ? */
2047 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2048 continue;
2049
2050 /* only free hw when no longer used - check all FEs */
2051 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2052 continue;
2053
36fba62c
QZ		 2054 /* do not free hw if this BE is used by other FE */
2055 if (be->dpcm[stream].users > 1)
2056 continue;
2057
01d7584c
LG		 2058 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2059 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2060 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
08b27848 2061 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
5e82d2be
VK		 2062 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2063 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
01d7584c
LG		 2064 continue;
2065
103d84a3 2066 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
94d215cc 2067 be->dai_link->name);
01d7584c
LG		 2068
2069 soc_pcm_hw_free(be_substream);
2070
2071 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2072 }
2073
2074 return 0;
2075}
2076
45c0a188 2077static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c
LG		 2078{
2079 struct snd_soc_pcm_runtime *fe = substream->private_data;
2080 int err, stream = substream->stream;
2081
2082 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 2083 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 2084
103d84a3 2085 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
01d7584c
LG		 2086
2087 /* call hw_free on the frontend */
2088 err = soc_pcm_hw_free(substream);
2089 if (err < 0)
103d84a3 2090 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
01d7584c
LG		 2091 fe->dai_link->name);
2092
2093 /* only hw_params backends that are either sinks or sources
2094 * to this frontend DAI */
2095 err = dpcm_be_dai_hw_free(fe, stream);
2096
2097 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
ea9d0d77 2098 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2099
2100 mutex_unlock(&fe->card->mutex);
2101 return 0;
2102}
2103
23607025 2104int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2105{
2106 struct snd_soc_dpcm *dpcm;
2107 int ret;
2108
8d6258a4 2109 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2110
2111 struct snd_soc_pcm_runtime *be = dpcm->be;
2112 struct snd_pcm_substream *be_substream =
2113 snd_soc_dpcm_get_substream(be, stream);
2114
2115 /* is this op for this BE ? */
2116 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2117 continue;
2118
01d7584c
LG		 2119 /* copy params for each dpcm */
2120 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2121 sizeof(struct snd_pcm_hw_params));
2122
2123 /* perform any hw_params fixups */
2124 if (be->dai_link->be_hw_params_fixup) {
2125 ret = be->dai_link->be_hw_params_fixup(be,
2126 &dpcm->hw_params);
2127 if (ret < 0) {
2128 dev_err(be->dev,
103d84a3 2129 "ASoC: hw_params BE fixup failed %d\n",
01d7584c
LG		 2130 ret);
2131 goto unwind;
2132 }
2133 }
2134
ae061d2a
LY		 2135 /* copy the fixed-up hw params for BE dai */
2136 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2137 sizeof(struct snd_pcm_hw_params));
2138
b0639bd2
KM		 2139 /* only allow hw_params() if no connected FEs are running */
2140 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2141 continue;
2142
2143 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2144 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2145 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2146 continue;
2147
2148 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
94d215cc 2149 be->dai_link->name);
b0639bd2 2150
01d7584c
LG		 2151 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2152 if (ret < 0) {
2153 dev_err(dpcm->be->dev,
103d84a3 2154 "ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2155 goto unwind;
2156 }
2157
2158 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2159 }
2160 return 0;
2161
2162unwind:
2163 /* disable any enabled and non active backends */
8d6258a4 2164 for_each_dpcm_be_rollback(fe, stream, dpcm) {
01d7584c
LG		 2165 struct snd_soc_pcm_runtime *be = dpcm->be;
2166 struct snd_pcm_substream *be_substream =
2167 snd_soc_dpcm_get_substream(be, stream);
2168
2169 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2170 continue;
2171
2172 /* only allow hw_free() if no connected FEs are running */
2173 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2174 continue;
2175
2176 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2177 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2178 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2179 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2180 continue;
2181
2182 soc_pcm_hw_free(be_substream);
2183 }
2184
2185 return ret;
2186}
2187
45c0a188
MB		 2188static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2189 struct snd_pcm_hw_params *params)
01d7584c
LG		 2190{
2191 struct snd_soc_pcm_runtime *fe = substream->private_data;
2192 int ret, stream = substream->stream;
2193
2194 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
ea9d0d77 2195 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2196
2197 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2198 sizeof(struct snd_pcm_hw_params));
2199 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2200 if (ret < 0) {
103d84a3 2201 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
01d7584c
LG		 2202 goto out;
2203 }
2204
103d84a3 2205 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
01d7584c
LG		 2206 fe->dai_link->name, params_rate(params),
2207 params_channels(params), params_format(params));
2208
2209 /* call hw_params on the frontend */
2210 ret = soc_pcm_hw_params(substream, params);
2211 if (ret < 0) {
103d84a3 2212 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
01d7584c
LG		 2213 dpcm_be_dai_hw_free(fe, stream);
2214 } else
2215 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2216
2217out:
ea9d0d77 2218 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2219 mutex_unlock(&fe->card->mutex);
2220 return ret;
2221}
2222
2223static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2224 struct snd_pcm_substream *substream, int cmd)
2225{
2226 int ret;
2227
103d84a3 2228 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
94d215cc 2229 dpcm->be->dai_link->name, cmd);
01d7584c
LG		 2230
2231 ret = soc_pcm_trigger(substream, cmd);
2232 if (ret < 0)
103d84a3 2233 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
01d7584c
LG		 2234
2235 return ret;
2236}
2237
23607025 2238int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
45c0a188 2239 int cmd)
01d7584c
LG		 2240{
2241 struct snd_soc_dpcm *dpcm;
2242 int ret = 0;
2243
8d6258a4 2244 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2245
2246 struct snd_soc_pcm_runtime *be = dpcm->be;
2247 struct snd_pcm_substream *be_substream =
2248 snd_soc_dpcm_get_substream(be, stream);
2249
2250 /* is this op for this BE ? */
2251 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2252 continue;
2253
2254 switch (cmd) {
2255 case SNDRV_PCM_TRIGGER_START:
2256 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2257 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2258 continue;
2259
2260 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2261 if (ret)
2262 return ret;
2263
2264 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2265 break;
2266 case SNDRV_PCM_TRIGGER_RESUME:
2267 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2268 continue;
2269
2270 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2271 if (ret)
2272 return ret;
2273
2274 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2275 break;
2276 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2277 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2278 continue;
2279
2280 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2281 if (ret)
2282 return ret;
2283
2284 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2285 break;
2286 case SNDRV_PCM_TRIGGER_STOP:
2287 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2288 continue;
2289
2290 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2291 continue;
2292
2293 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2294 if (ret)
2295 return ret;
2296
2297 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2298 break;
2299 case SNDRV_PCM_TRIGGER_SUSPEND:
868a6ca8 2300 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
01d7584c
LG		 2301 continue;
2302
2303 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2304 continue;
2305
2306 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2307 if (ret)
2308 return ret;
2309
2310 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2311 break;
2312 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2313 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2314 continue;
2315
2316 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2317 continue;
2318
2319 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2320 if (ret)
2321 return ret;
2322
2323 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2324 break;
2325 }
2326 }
2327
2328 return ret;
2329}
2330EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2331
acbf2774
RS		 2332static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2333 int cmd, bool fe_first)
2334{
2335 struct snd_soc_pcm_runtime *fe = substream->private_data;
2336 int ret;
2337
2338 /* call trigger on the frontend before the backend. */
2339 if (fe_first) {
2340 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2341 fe->dai_link->name, cmd);
2342
2343 ret = soc_pcm_trigger(substream, cmd);
2344 if (ret < 0)
2345 return ret;
2346
2347 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2348 return ret;
2349 }
2350
2351 /* call trigger on the frontend after the backend. */
2352 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2353 if (ret < 0)
2354 return ret;
2355
2356 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2357 fe->dai_link->name, cmd);
2358
2359 ret = soc_pcm_trigger(substream, cmd);
2360
2361 return ret;
2362}
2363
ea9d0d77 2364static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c
LG		 2365{
2366 struct snd_soc_pcm_runtime *fe = substream->private_data;
acbf2774
RS		 2367 int stream = substream->stream;
2368 int ret = 0;
01d7584c
LG		 2369 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2370
2371 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2372
2373 switch (trigger) {
2374 case SND_SOC_DPCM_TRIGGER_PRE:
acbf2774
RS		 2375 switch (cmd) {
2376 case SNDRV_PCM_TRIGGER_START:
2377 case SNDRV_PCM_TRIGGER_RESUME:
2378 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2379 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2380 break;
2381 case SNDRV_PCM_TRIGGER_STOP:
2382 case SNDRV_PCM_TRIGGER_SUSPEND:
2383 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2384 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2385 break;
2386 default:
2387 ret = -EINVAL;
2388 break;
01d7584c 2389 }
01d7584c
LG		 2390 break;
2391 case SND_SOC_DPCM_TRIGGER_POST:
acbf2774
RS		 2392 switch (cmd) {
2393 case SNDRV_PCM_TRIGGER_START:
2394 case SNDRV_PCM_TRIGGER_RESUME:
2395 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2396 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2397 break;
2398 case SNDRV_PCM_TRIGGER_STOP:
2399 case SNDRV_PCM_TRIGGER_SUSPEND:
2400 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2401 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2402 break;
2403 default:
2404 ret = -EINVAL;
2405 break;
01d7584c 2406 }
01d7584c 2407 break;
07bf84aa
LG		 2408 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2409 /* bespoke trigger() - handles both FE and BEs */
2410
103d84a3 2411 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
07bf84aa
LG		 2412 fe->dai_link->name, cmd);
2413
2414 ret = soc_pcm_bespoke_trigger(substream, cmd);
07bf84aa 2415 break;
01d7584c 2416 default:
103d84a3 2417 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
01d7584c
LG		 2418 fe->dai_link->name);
2419 ret = -EINVAL;
2420 goto out;
2421 }
2422
acbf2774
RS		 2423 if (ret < 0) {
2424 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2425 cmd, ret);
2426 goto out;
2427 }
2428
01d7584c
LG		 2429 switch (cmd) {
2430 case SNDRV_PCM_TRIGGER_START:
2431 case SNDRV_PCM_TRIGGER_RESUME:
2432 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2433 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2434 break;
2435 case SNDRV_PCM_TRIGGER_STOP:
2436 case SNDRV_PCM_TRIGGER_SUSPEND:
01d7584c
LG		 2437 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2438 break;
9f169b9f
PL		 2439 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2440 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2441 break;
01d7584c
LG		 2442 }
2443
2444out:
2445 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2446 return ret;
2447}
2448
ea9d0d77
TI		 2449static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2450{
2451 struct snd_soc_pcm_runtime *fe = substream->private_data;
2452 int stream = substream->stream;
2453
2454 /* if FE's runtime_update is already set, we're in race;
2455 * process this trigger later at exit
2456 */
2457 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2458 fe->dpcm[stream].trigger_pending = cmd + 1;
2459 return 0; /* delayed, assuming it's successful */
2460 }
2461
2462 /* we're alone, let's trigger */
2463 return dpcm_fe_dai_do_trigger(substream, cmd);
2464}
2465
23607025 2466int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2467{
2468 struct snd_soc_dpcm *dpcm;
2469 int ret = 0;
2470
8d6258a4 2471 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2472
2473 struct snd_soc_pcm_runtime *be = dpcm->be;
2474 struct snd_pcm_substream *be_substream =
2475 snd_soc_dpcm_get_substream(be, stream);
2476
2477 /* is this op for this BE ? */
2478 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2479 continue;
2480
2481 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
95f444dc 2482 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
5087a8f1
LY		 2483 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2484 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
01d7584c
LG		 2485 continue;
2486
103d84a3 2487 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
94d215cc 2488 be->dai_link->name);
01d7584c
LG		 2489
2490 ret = soc_pcm_prepare(be_substream);
2491 if (ret < 0) {
103d84a3 2492 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
01d7584c
LG		 2493 ret);
2494 break;
2495 }
2496
2497 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2498 }
2499 return ret;
2500}
2501
45c0a188 2502static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c
LG		 2503{
2504 struct snd_soc_pcm_runtime *fe = substream->private_data;
2505 int stream = substream->stream, ret = 0;
2506
2507 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2508
103d84a3 2509 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
01d7584c 2510
ea9d0d77 2511 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2512
2513 /* there is no point preparing this FE if there are no BEs */
2514 if (list_empty(&fe->dpcm[stream].be_clients)) {
103d84a3 2515 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
01d7584c
LG		 2516 fe->dai_link->name);
2517 ret = -EINVAL;
2518 goto out;
2519 }
2520
2521 ret = dpcm_be_dai_prepare(fe, substream->stream);
2522 if (ret < 0)
2523 goto out;
2524
2525 /* call prepare on the frontend */
2526 ret = soc_pcm_prepare(substream);
2527 if (ret < 0) {
103d84a3 2528 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
01d7584c
LG		 2529 fe->dai_link->name);
2530 goto out;
2531 }
2532
2533 /* run the stream event for each BE */
2534 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2535 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2536
2537out:
ea9d0d77 2538 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 2539 mutex_unlock(&fe->card->mutex);
2540
2541 return ret;
2542}
2543
618dae11
LG		 2544static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2545{
07bf84aa
LG		 2546 struct snd_pcm_substream *substream =
2547 snd_soc_dpcm_get_substream(fe, stream);
2548 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 2549 int err;
2550
103d84a3 2551 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
618dae11
LG		 2552 stream ? "capture" : "playback", fe->dai_link->name);
2553
07bf84aa
LG		 2554 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2555 /* call bespoke trigger - FE takes care of all BE triggers */
103d84a3 2556 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
07bf84aa
LG		 2557 fe->dai_link->name);
2558
2559 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2560 if (err < 0)
103d84a3 2561 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2562 } else {
103d84a3 2563 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
07bf84aa
LG		 2564 fe->dai_link->name);
2565
2566 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2567 if (err < 0)
103d84a3 2568 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
07bf84aa 2569 }
618dae11
LG		 2570
2571 err = dpcm_be_dai_hw_free(fe, stream);
2572 if (err < 0)
103d84a3 2573 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
618dae11
LG		 2574
2575 err = dpcm_be_dai_shutdown(fe, stream);
2576 if (err < 0)
103d84a3 2577 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
618dae11
LG		 2578
2579 /* run the stream event for each BE */
2580 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2581
2582 return 0;
2583}
2584
2585static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2586{
07bf84aa
LG		 2587 struct snd_pcm_substream *substream =
2588 snd_soc_dpcm_get_substream(fe, stream);
618dae11 2589 struct snd_soc_dpcm *dpcm;
07bf84aa 2590 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11 2591 int ret;
a9764869 2592 unsigned long flags;
618dae11 2593
103d84a3 2594 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
618dae11
LG		 2595 stream ? "capture" : "playback", fe->dai_link->name);
2596
2597 /* Only start the BE if the FE is ready */
2598 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2599 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2600 return -EINVAL;
2601
2602 /* startup must always be called for new BEs */
2603 ret = dpcm_be_dai_startup(fe, stream);
fffc0ca2 2604 if (ret < 0)
618dae11 2605 goto disconnect;
618dae11
LG		 2606
2607 /* keep going if FE state is > open */
2608 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2609 return 0;
01d7584c 2610
618dae11 2611 ret = dpcm_be_dai_hw_params(fe, stream);
fffc0ca2 2612 if (ret < 0)
618dae11 2613 goto close;
618dae11
LG		 2614
2615 /* keep going if FE state is > hw_params */
2616 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2617 return 0;
2618
2619
2620 ret = dpcm_be_dai_prepare(fe, stream);
fffc0ca2 2621 if (ret < 0)
618dae11 2622 goto hw_free;
618dae11
LG		 2623
2624 /* run the stream event for each BE */
2625 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2626
2627 /* keep going if FE state is > prepare */
2628 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2629 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2630 return 0;
2631
07bf84aa
LG		 2632 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2633 /* call trigger on the frontend - FE takes care of all BE triggers */
103d84a3 2634 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
07bf84aa 2635 fe->dai_link->name);
618dae11 2636
07bf84aa
LG		 2637 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2638 if (ret < 0) {
103d84a3 2639 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
07bf84aa
LG		 2640 goto hw_free;
2641 }
2642 } else {
103d84a3 2643 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
07bf84aa
LG		 2644 fe->dai_link->name);
2645
2646 ret = dpcm_be_dai_trigger(fe, stream,
2647 SNDRV_PCM_TRIGGER_START);
2648 if (ret < 0) {
103d84a3 2649 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
07bf84aa
LG		 2650 goto hw_free;
2651 }
618dae11
LG		 2652 }
2653
2654 return 0;
2655
2656hw_free:
2657 dpcm_be_dai_hw_free(fe, stream);
2658close:
2659 dpcm_be_dai_shutdown(fe, stream);
2660disconnect:
2661 /* disconnect any non started BEs */
a9764869 2662 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 2663 for_each_dpcm_be(fe, stream, dpcm) {
618dae11
LG		 2664 struct snd_soc_pcm_runtime *be = dpcm->be;
2665 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2666 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2667 }
a9764869 2668 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
618dae11
LG		 2669
2670 return ret;
2671}
2672
2673static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2674{
2675 int ret;
2676
ea9d0d77 2677 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2678 ret = dpcm_run_update_startup(fe, stream);
2679 if (ret < 0)
103d84a3 2680 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
ea9d0d77 2681 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2682
2683 return ret;
2684}
2685
2686static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2687{
2688 int ret;
2689
ea9d0d77 2690 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
618dae11
LG		 2691 ret = dpcm_run_update_shutdown(fe, stream);
2692 if (ret < 0)
103d84a3 2693 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
ea9d0d77 2694 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11
LG		 2695
2696 return ret;
2697}
2698
de15d7ff 2699static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
618dae11 2700{
de15d7ff
JB		 2701 struct snd_soc_dapm_widget_list *list;
2702 int count, paths;
618dae11 2703
de15d7ff
JB		 2704 if (!fe->dai_link->dynamic)
2705 return 0;
618dae11 2706
de15d7ff
JB		 2707 /* only check active links */
2708 if (!fe->cpu_dai->active)
2709 return 0;
618dae11 2710
de15d7ff
JB		 2711 /* DAPM sync will call this to update DSP paths */
2712 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2713 new ? "new" : "old", fe->dai_link->name);
618dae11 2714
de15d7ff 2715 /* skip if FE doesn't have playback capability */
467fece8
KM		 2716 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2717 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
de15d7ff 2718 goto capture;
618dae11 2719
de15d7ff
JB		 2720 /* skip if FE isn't currently playing */
2721 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2722 goto capture;
618dae11 2723
de15d7ff
JB		 2724 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2725 if (paths < 0) {
2726 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2727 fe->dai_link->name, "playback");
2728 return paths;
2729 }
618dae11 2730
de15d7ff
JB		 2731 /* update any playback paths */
2732 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2733 if (count) {
2734 if (new)
2735 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2736 else
618dae11 2737 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
618dae11 2738
de15d7ff
JB		 2739 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2740 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2741 }
2742
2743 dpcm_path_put(&list);
2744
618dae11 2745capture:
de15d7ff 2746 /* skip if FE doesn't have capture capability */
467fece8
KM		 2747 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2748 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
de15d7ff 2749 return 0;
075207d2 2750
de15d7ff
JB		 2751 /* skip if FE isn't currently capturing */
2752 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2753 return 0;
618dae11 2754
de15d7ff
JB		 2755 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2756 if (paths < 0) {
2757 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2758 fe->dai_link->name, "capture");
2759 return paths;
2760 }
618dae11 2761
de15d7ff
JB		 2762 /* update any old capture paths */
2763 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2764 if (count) {
2765 if (new)
618dae11 2766 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
de15d7ff 2767 else
618dae11 2768 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
618dae11 2769
de15d7ff
JB		 2770 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2771 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
618dae11
LG		 2772 }
2773
de15d7ff
JB		 2774 dpcm_path_put(&list);
2775
618dae11
LG		 2776 return 0;
2777}
de15d7ff
JB		 2778
2779/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2780 * any DAI links.
2781 */
2782int soc_dpcm_runtime_update(struct snd_soc_card *card)
2783{
2784 struct snd_soc_pcm_runtime *fe;
2785 int ret = 0;
2786
2787 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2788 /* shutdown all old paths first */
bcb1fd1f 2789 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2790 ret = soc_dpcm_fe_runtime_update(fe, 0);
2791 if (ret)
2792 goto out;
2793 }
2794
2795 /* bring new paths up */
bcb1fd1f 2796 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2797 ret = soc_dpcm_fe_runtime_update(fe, 1);
2798 if (ret)
2799 goto out;
2800 }
2801
2802out:
2803 mutex_unlock(&card->mutex);
2804 return ret;
2805}
01d7584c
LG		 2806int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2807{
2808 struct snd_soc_dpcm *dpcm;
7afecb30 2809 struct snd_soc_dai *dai;
01d7584c 2810
8d6258a4 2811 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
01d7584c
LG		 2812
2813 struct snd_soc_pcm_runtime *be = dpcm->be;
2e5894d7 2814 int i;
01d7584c
LG		 2815
2816 if (be->dai_link->ignore_suspend)
2817 continue;
2818
7afecb30 2819 for_each_rtd_codec_dai(be, i, dai) {
2e5894d7
BC		 2820 struct snd_soc_dai_driver *drv = dai->driver;
2821
2822 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2823 be->dai_link->name);
01d7584c 2824
2e5894d7
BC		 2825 if (drv->ops && drv->ops->digital_mute &&
2826 dai->playback_active)
2827 drv->ops->digital_mute(dai, mute);
2828 }
01d7584c
LG		 2829 }
2830
2831 return 0;
2832}
2833
45c0a188 2834static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2835{
2836 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2837 struct snd_soc_dpcm *dpcm;
2838 struct snd_soc_dapm_widget_list *list;
2839 int ret;
2840 int stream = fe_substream->stream;
2841
2842 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2843 fe->dpcm[stream].runtime = fe_substream->runtime;
2844
8f70e515
QZ		 2845 ret = dpcm_path_get(fe, stream, &list);
2846 if (ret < 0) {
2847 mutex_unlock(&fe->card->mutex);
2848 return ret;
2849 } else if (ret == 0) {
103d84a3 2850 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
01d7584c 2851 fe->dai_link->name, stream ? "capture" : "playback");
01d7584c
LG		 2852 }
2853
2854 /* calculate valid and active FE <-> BE dpcms */
2855 dpcm_process_paths(fe, stream, &list, 1);
2856
2857 ret = dpcm_fe_dai_startup(fe_substream);
2858 if (ret < 0) {
2859 /* clean up all links */
8d6258a4 2860 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2861 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2862
2863 dpcm_be_disconnect(fe, stream);
2864 fe->dpcm[stream].runtime = NULL;
2865 }
2866
2867 dpcm_clear_pending_state(fe, stream);
2868 dpcm_path_put(&list);
2869 mutex_unlock(&fe->card->mutex);
2870 return ret;
2871}
2872
45c0a188 2873static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
01d7584c
LG		 2874{
2875 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2876 struct snd_soc_dpcm *dpcm;
2877 int stream = fe_substream->stream, ret;
2878
2879 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2880 ret = dpcm_fe_dai_shutdown(fe_substream);
2881
2882 /* mark FE's links ready to prune */
8d6258a4 2883 for_each_dpcm_be(fe, stream, dpcm)
01d7584c
LG		 2884 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2885
2886 dpcm_be_disconnect(fe, stream);
2887
2888 fe->dpcm[stream].runtime = NULL;
2889 mutex_unlock(&fe->card->mutex);
2890 return ret;
2891}
2892
5d61f0ba
TI		 2893static void soc_pcm_private_free(struct snd_pcm *pcm)
2894{
2895 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
f523aceb 2896
f30a4c31
KM		 2897 /* need to sync the delayed work before releasing resources */
2898 flush_delayed_work(&rtd->delayed_work);
79776da0 2899 snd_soc_pcm_component_free(pcm);
5d61f0ba
TI		 2900}
2901
ddee627c
LG		 2902/* create a new pcm */
2903int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2904{
2e5894d7 2905 struct snd_soc_dai *codec_dai;
ddee627c 2906 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
f523aceb 2907 struct snd_soc_rtdcom_list *rtdcom;
2b544dd7 2908 struct snd_soc_component *component;
ddee627c
LG		 2909 struct snd_pcm *pcm;
2910 char new_name[64];
2911 int ret = 0, playback = 0, capture = 0;
2e5894d7 2912 int i;
ddee627c 2913
01d7584c 2914 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
1e9de42f
LG		 2915 playback = rtd->dai_link->dpcm_playback;
2916 capture = rtd->dai_link->dpcm_capture;
01d7584c 2917 } else {
a342031c
JB		 2918 /* Adapt stream for codec2codec links */
2919 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2920 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2921 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2922 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2923
0b7990e3 2924 for_each_rtd_codec_dai(rtd, i, codec_dai) {
467fece8
KM		 2925 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2926 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2e5894d7 2927 playback = 1;
467fece8
KM		 2928 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2929 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2e5894d7
BC		 2930 capture = 1;
2931 }
a342031c
JB		 2932
2933 capture = capture && cpu_capture->channels_min;
2934 playback = playback && cpu_playback->channels_min;
01d7584c
LG		 2935 }
2936
d6bead02
FE		 2937 if (rtd->dai_link->playback_only) {
2938 playback = 1;
2939 capture = 0;
2940 }
2941
2942 if (rtd->dai_link->capture_only) {
2943 playback = 0;
2944 capture = 1;
2945 }
2946
01d7584c 2947 /* create the PCM */
a342031c
JB		 2948 if (rtd->dai_link->params) {
2949 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2950 rtd->dai_link->stream_name);
2951
2952 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2953 playback, capture, &pcm);
2954 } else if (rtd->dai_link->no_pcm) {
01d7584c
LG		 2955 snprintf(new_name, sizeof(new_name), "(%s)",
2956 rtd->dai_link->stream_name);
2957
2958 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2959 playback, capture, &pcm);
2960 } else {
2961 if (rtd->dai_link->dynamic)
2962 snprintf(new_name, sizeof(new_name), "%s (*)",
2963 rtd->dai_link->stream_name);
2964 else
2965 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2e5894d7
BC		 2966 rtd->dai_link->stream_name,
2967 (rtd->num_codecs > 1) ?
2968 "multicodec" : rtd->codec_dai->name, num);
01d7584c
LG		 2969
2970 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2971 capture, &pcm);
2972 }
ddee627c 2973 if (ret < 0) {
103d84a3 2974 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
5cb9b748 2975 rtd->dai_link->name);
ddee627c
LG		 2976 return ret;
2977 }
103d84a3 2978 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
ddee627c
LG		 2979
2980 /* DAPM dai link stream work */
a342031c
JB		 2981 if (rtd->dai_link->params)
2982 INIT_DELAYED_WORK(&rtd->delayed_work,
2983 codec2codec_close_delayed_work);
2984 else
2985 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
ddee627c 2986
48c7699f 2987 pcm->nonatomic = rtd->dai_link->nonatomic;
ddee627c
LG		 2988 rtd->pcm = pcm;
2989 pcm->private_data = rtd;
01d7584c 2990
a342031c 2991 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
01d7584c
LG		 2992 if (playback)
2993 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2994 if (capture)
2995 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2996 goto out;
2997 }
2998
2999 /* ASoC PCM operations */
3000 if (rtd->dai_link->dynamic) {
3001 rtd->ops.open = dpcm_fe_dai_open;
3002 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
3003 rtd->ops.prepare = dpcm_fe_dai_prepare;
3004 rtd->ops.trigger = dpcm_fe_dai_trigger;
3005 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3006 rtd->ops.close = dpcm_fe_dai_close;
3007 rtd->ops.pointer = soc_pcm_pointer;
3008 } else {
3009 rtd->ops.open = soc_pcm_open;
3010 rtd->ops.hw_params = soc_pcm_hw_params;
3011 rtd->ops.prepare = soc_pcm_prepare;
3012 rtd->ops.trigger = soc_pcm_trigger;
3013 rtd->ops.hw_free = soc_pcm_hw_free;
3014 rtd->ops.close = soc_pcm_close;
3015 rtd->ops.pointer = soc_pcm_pointer;
3016 }
3017
2b544dd7
KM		 3018 for_each_rtd_components(rtd, rtdcom, component) {
3019 const struct snd_soc_component_driver *drv = component->driver;
b8135864 3020
3b1c952c
TI		 3021 if (drv->ioctl)
3022 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
e9067bb5 3023 if (drv->copy_user)
82d81f5c 3024 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
e9067bb5 3025 if (drv->page)
9c712e4f 3026 rtd->ops.page = snd_soc_pcm_component_page;
e9067bb5 3027 if (drv->mmap)
205875e1 3028 rtd->ops.mmap = snd_soc_pcm_component_mmap;
ddee627c
LG		 3029 }
3030
3031 if (playback)
01d7584c 3032 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 3033
3034 if (capture)
01d7584c 3035 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c 3036
7484291e
KM		 3037 ret = snd_soc_pcm_component_new(pcm);
3038 if (ret < 0) {
3039 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3040 return ret;
ddee627c 3041 }
c641e5b2 3042
5d61f0ba 3043 pcm->private_free = soc_pcm_private_free;
3d21ef0b 3044 pcm->no_device_suspend = true;
01d7584c 3045out:
2e5894d7
BC		 3046 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3047 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3048 cpu_dai->name);
ddee627c
LG		 3049 return ret;
3050}
01d7584c
LG		 3051
3052/* is the current PCM operation for this FE ? */
3053int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3054{
3055 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3056 return 1;
3057 return 0;
3058}
3059EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3060
3061/* is the current PCM operation for this BE ? */
3062int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3063 struct snd_soc_pcm_runtime *be, int stream)
3064{
3065 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3066 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3067 be->dpcm[stream].runtime_update))
3068 return 1;
3069 return 0;
3070}
3071EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3072
3073/* get the substream for this BE */
3074struct snd_pcm_substream *
3075 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3076{
3077 return be->pcm->streams[stream].substream;
3078}
3079EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3080
3081/* get the BE runtime state */
3082enum snd_soc_dpcm_state
3083 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3084{
3085 return be->dpcm[stream].state;
3086}
3087EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3088
3089/* set the BE runtime state */
3090void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3091 int stream, enum snd_soc_dpcm_state state)
3092{
3093 be->dpcm[stream].state = state;
3094}
3095EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3096
3097/*
3098 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3099 * are not running, paused or suspended for the specified stream direction.
3100 */
3101int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3102 struct snd_soc_pcm_runtime *be, int stream)
3103{
3104 struct snd_soc_dpcm *dpcm;
3105 int state;
a9764869
KC		 3106 int ret = 1;
3107 unsigned long flags;
01d7584c 3108
a9764869 3109 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
d2e24d64 3110 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3111
3112 if (dpcm->fe == fe)
3113 continue;
3114
3115 state = dpcm->fe->dpcm[stream].state;
3116 if (state == SND_SOC_DPCM_STATE_START ||
3117 state == SND_SOC_DPCM_STATE_PAUSED ||
a9764869
KC		 3118 state == SND_SOC_DPCM_STATE_SUSPEND) {
3119 ret = 0;
3120 break;
3121 }
01d7584c 3122 }
a9764869 3123 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 3124
3125 /* it's safe to free/stop this BE DAI */
a9764869 3126 return ret;
01d7584c
LG		 3127}
3128EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3129
3130/*
3131 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3132 * running, paused or suspended for the specified stream direction.
3133 */
3134int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3135 struct snd_soc_pcm_runtime *be, int stream)
3136{
3137 struct snd_soc_dpcm *dpcm;
3138 int state;
a9764869
KC		 3139 int ret = 1;
3140 unsigned long flags;
01d7584c 3141
a9764869 3142 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
d2e24d64 3143 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3144
3145 if (dpcm->fe == fe)
3146 continue;
3147
3148 state = dpcm->fe->dpcm[stream].state;
3149 if (state == SND_SOC_DPCM_STATE_START ||
3150 state == SND_SOC_DPCM_STATE_PAUSED ||
3151 state == SND_SOC_DPCM_STATE_SUSPEND ||
a9764869
KC		 3152 state == SND_SOC_DPCM_STATE_PREPARE) {
3153 ret = 0;
3154 break;
3155 }
01d7584c 3156 }
a9764869 3157 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
01d7584c
LG		 3158
3159 /* it's safe to change hw_params */
a9764869 3160 return ret;
01d7584c
LG		 3161}
3162EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
f86dcef8
LG		 3163
3164#ifdef CONFIG_DEBUG_FS
85280141 3165static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
f86dcef8
LG		 3166{
3167 switch (state) {
3168 case SND_SOC_DPCM_STATE_NEW:
3169 return "new";
3170 case SND_SOC_DPCM_STATE_OPEN:
3171 return "open";
3172 case SND_SOC_DPCM_STATE_HW_PARAMS:
3173 return "hw_params";
3174 case SND_SOC_DPCM_STATE_PREPARE:
3175 return "prepare";
3176 case SND_SOC_DPCM_STATE_START:
3177 return "start";
3178 case SND_SOC_DPCM_STATE_STOP:
3179 return "stop";
3180 case SND_SOC_DPCM_STATE_SUSPEND:
3181 return "suspend";
3182 case SND_SOC_DPCM_STATE_PAUSED:
3183 return "paused";
3184 case SND_SOC_DPCM_STATE_HW_FREE:
3185 return "hw_free";
3186 case SND_SOC_DPCM_STATE_CLOSE:
3187 return "close";
3188 }
3189
3190 return "unknown";
3191}
3192
f86dcef8
LG		 3193static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3194 int stream, char *buf, size_t size)
3195{
3196 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3197 struct snd_soc_dpcm *dpcm;
3198 ssize_t offset = 0;
a9764869 3199 unsigned long flags;
f86dcef8
LG		 3200
3201 /* FE state */
3202 offset += snprintf(buf + offset, size - offset,
3203 "[%s - %s]\n", fe->dai_link->name,
3204 stream ? "Capture" : "Playback");
3205
3206 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3207 dpcm_state_string(fe->dpcm[stream].state));
3208
3209 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3210 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3211 offset += snprintf(buf + offset, size - offset,
3212 "Hardware Params: "
3213 "Format = %s, Channels = %d, Rate = %d\n",
3214 snd_pcm_format_name(params_format(params)),
3215 params_channels(params),
3216 params_rate(params));
3217
3218 /* BEs state */
3219 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3220
3221 if (list_empty(&fe->dpcm[stream].be_clients)) {
3222 offset += snprintf(buf + offset, size - offset,
3223 " No active DSP links\n");
3224 goto out;
3225 }
3226
a9764869 3227 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
8d6258a4 3228 for_each_dpcm_be(fe, stream, dpcm) {
f86dcef8
LG		 3229 struct snd_soc_pcm_runtime *be = dpcm->be;
3230 params = &dpcm->hw_params;
3231
3232 offset += snprintf(buf + offset, size - offset,
3233 "- %s\n", be->dai_link->name);
3234
3235 offset += snprintf(buf + offset, size - offset,
3236 " State: %s\n",
3237 dpcm_state_string(be->dpcm[stream].state));
3238
3239 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3240 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3241 offset += snprintf(buf + offset, size - offset,
3242 " Hardware Params: "
3243 "Format = %s, Channels = %d, Rate = %d\n",
3244 snd_pcm_format_name(params_format(params)),
3245 params_channels(params),
3246 params_rate(params));
3247 }
a9764869 3248 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
f86dcef8
LG		 3249out:
3250 return offset;
3251}
3252
3253static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3254 size_t count, loff_t *ppos)
3255{
3256 struct snd_soc_pcm_runtime *fe = file->private_data;
3257 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3258 char *buf;
3259
3260 buf = kmalloc(out_count, GFP_KERNEL);
3261 if (!buf)
3262 return -ENOMEM;
3263
467fece8 3264 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
f86dcef8
LG		 3265 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3266 buf + offset, out_count - offset);
3267
467fece8 3268 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
f86dcef8
LG		 3269 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3270 buf + offset, out_count - offset);
3271
f57b8488 3272 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
f86dcef8 3273
f57b8488
LG		 3274 kfree(buf);
3275 return ret;
f86dcef8
LG		 3276}
3277
3278static const struct file_operations dpcm_state_fops = {
f57b8488 3279 .open = simple_open,
f86dcef8
LG		 3280 .read = dpcm_state_read_file,
3281 .llseek = default_llseek,
3282};
3283
2e55b90a 3284void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
f86dcef8 3285{
b3bba9a1 3286 if (!rtd->dai_link)
2e55b90a 3287 return;
b3bba9a1 3288
596becd3
KM		 3289 if (!rtd->dai_link->dynamic)
3290 return;
3291
6553bf06
LPC		 3292 if (!rtd->card->debugfs_card_root)
3293 return;
b3bba9a1 3294
f86dcef8
LG		 3295 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3296 rtd->card->debugfs_card_root);
f86dcef8 3297
f1e3f409
FE		 3298 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3299 rtd, &dpcm_state_fops);
f86dcef8
LG		 3300}
3301#endif
Linux 6.x block layer and io_uring tree(s)