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ASoC: soc-dai: add flag to mute and unmute stream during trigger
[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>
ddee627c
LG		 17#include <linux/slab.h>
18#include <linux/workqueue.h>
01d7584c 19#include <linux/export.h>
f86dcef8 20#include <linux/debugfs.h>
ddee627c
LG		 21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
01d7584c 25#include <sound/soc-dpcm.h>
a5e6c109 26#include <sound/soc-link.h>
ddee627c
LG		 27#include <sound/initval.h>
28
04110728
KM		 29#define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret)
30static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
31 const char *func, int ret)
32{
33 /* Positive, Zero values are not errors */
34 if (ret >= 0)
35 return ret;
36
37 /* Negative values might be errors */
38 switch (ret) {
39 case -EPROBE_DEFER:
40 case -ENOTSUPP:
1f566435 41 case -EINVAL:
04110728
KM		 42 break;
43 default:
44 dev_err(rtd->dev,
45 "ASoC: error at %s on %s: %d\n",
46 func, rtd->dai_link->name, ret);
47 }
48
49 return ret;
50}
51
b7898396
TI		 52static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd,
53 int stream)
54{
55 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream));
56}
57
3c75c0ea
TI		 58#define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \
59 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags)
b2ae8066 60
b7898396
TI		 61static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd,
62 int stream)
63{
64 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream));
65}
66
b2ae8066
TI		 67#define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \
68 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags)
69
01d7584c
LG		 70#define DPCM_MAX_BE_USERS 8
71
6fb8944c
KM		 72static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
73{
3989ade2 74 return (rtd)->dai_link->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
6fb8944c
KM		 75}
76static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
77{
3989ade2 78 return (rtd)->dai_link->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
6fb8944c
KM		 79}
80
c3212829
KM		 81#ifdef CONFIG_DEBUG_FS
82static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
83{
84 switch (state) {
85 case SND_SOC_DPCM_STATE_NEW:
86 return "new";
87 case SND_SOC_DPCM_STATE_OPEN:
88 return "open";
89 case SND_SOC_DPCM_STATE_HW_PARAMS:
90 return "hw_params";
91 case SND_SOC_DPCM_STATE_PREPARE:
92 return "prepare";
93 case SND_SOC_DPCM_STATE_START:
94 return "start";
95 case SND_SOC_DPCM_STATE_STOP:
96 return "stop";
97 case SND_SOC_DPCM_STATE_SUSPEND:
98 return "suspend";
99 case SND_SOC_DPCM_STATE_PAUSED:
100 return "paused";
101 case SND_SOC_DPCM_STATE_HW_FREE:
102 return "hw_free";
103 case SND_SOC_DPCM_STATE_CLOSE:
104 return "close";
105 }
106
107 return "unknown";
108}
109
110static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
111 int stream, char *buf, size_t size)
112{
113 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
114 struct snd_soc_dpcm *dpcm;
115 ssize_t offset = 0;
c3212829
KM		 116
117 /* FE state */
d0c9abb8 118 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 119 "[%s - %s]\n", fe->dai_link->name,
120 stream ? "Capture" : "Playback");
121
d0c9abb8 122 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
c3212829
KM		 123 dpcm_state_string(fe->dpcm[stream].state));
124
125 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
126 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
d0c9abb8 127 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 128 "Hardware Params: "
129 "Format = %s, Channels = %d, Rate = %d\n",
130 snd_pcm_format_name(params_format(params)),
131 params_channels(params),
132 params_rate(params));
133
134 /* BEs state */
d0c9abb8 135 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
c3212829
KM		 136
137 if (list_empty(&fe->dpcm[stream].be_clients)) {
d0c9abb8 138 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 139 " No active DSP links\n");
140 goto out;
141 }
142
c3212829
KM		 143 for_each_dpcm_be(fe, stream, dpcm) {
144 struct snd_soc_pcm_runtime *be = dpcm->be;
25106550 145 params = &be->dpcm[stream].hw_params;
c3212829 146
d0c9abb8 147 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 148 "- %s\n", be->dai_link->name);
149
d0c9abb8 150 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 151 " State: %s\n",
152 dpcm_state_string(be->dpcm[stream].state));
153
154 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
155 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
d0c9abb8 156 offset += scnprintf(buf + offset, size - offset,
c3212829
KM		 157 " Hardware Params: "
158 "Format = %s, Channels = %d, Rate = %d\n",
159 snd_pcm_format_name(params_format(params)),
160 params_channels(params),
161 params_rate(params));
162 }
c3212829
KM		 163out:
164 return offset;
165}
166
167static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
168 size_t count, loff_t *ppos)
169{
170 struct snd_soc_pcm_runtime *fe = file->private_data;
171 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
172 int stream;
173 char *buf;
174
3989ade2 175 if (fe->dai_link->num_cpus > 1) {
6e1276a5
BL		 176 dev_err(fe->dev,
177 "%s doesn't support Multi CPU yet\n", __func__);
178 return -EINVAL;
179 }
180
c3212829
KM		 181 buf = kmalloc(out_count, GFP_KERNEL);
182 if (!buf)
183 return -ENOMEM;
184
b7898396 185 snd_soc_dpcm_mutex_lock(fe);
c3212829 186 for_each_pcm_streams(stream)
c2233a26 187 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
c3212829
KM		 188 offset += dpcm_show_state(fe, stream,
189 buf + offset,
190 out_count - offset);
b7898396 191 snd_soc_dpcm_mutex_unlock(fe);
c3212829
KM		 192
193 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
194
195 kfree(buf);
196 return ret;
197}
198
199static const struct file_operations dpcm_state_fops = {
200 .open = simple_open,
201 .read = dpcm_state_read_file,
202 .llseek = default_llseek,
203};
204
205void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
206{
c3212829
KM		 207 if (!rtd->dai_link->dynamic)
208 return;
209
210 if (!rtd->card->debugfs_card_root)
211 return;
212
213 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
214 rtd->card->debugfs_card_root);
215
216 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
217 rtd, &dpcm_state_fops);
218}
154dae87
KM		 219
220static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
221{
222 char *name;
223
224 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
225 stream ? "capture" : "playback");
226 if (name) {
227 dpcm->debugfs_state = debugfs_create_dir(
228 name, dpcm->fe->debugfs_dpcm_root);
229 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
230 &dpcm->state);
231 kfree(name);
232 }
233}
234
235static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
236{
237 debugfs_remove_recursive(dpcm->debugfs_state);
238}
239
240#else
241static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
242 int stream)
243{
244}
245
246static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
247{
248}
c3212829
KM		 249#endif
250
9c6d7f93
KM		 251/* Set FE's runtime_update state; the state is protected via PCM stream lock
252 * for avoiding the race with trigger callback.
253 * If the state is unset and a trigger is pending while the previous operation,
254 * process the pending trigger action here.
255 */
256static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
257static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
258 int stream, enum snd_soc_dpcm_update state)
259{
260 struct snd_pcm_substream *substream =
261 snd_soc_dpcm_get_substream(fe, stream);
262
b7898396 263 snd_soc_dpcm_stream_lock_irq(fe, stream);
9c6d7f93
KM		 264 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
265 dpcm_fe_dai_do_trigger(substream,
266 fe->dpcm[stream].trigger_pending - 1);
267 fe->dpcm[stream].trigger_pending = 0;
268 }
269 fe->dpcm[stream].runtime_update = state;
b7898396 270 snd_soc_dpcm_stream_unlock_irq(fe, stream);
9c6d7f93
KM		 271}
272
a7e20444
KM		 273static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
274 int stream, enum snd_soc_dpcm_update state)
275{
276 be->dpcm[stream].runtime_update = state;
277}
278
d9051d86
KM		 279/**
280 * snd_soc_runtime_action() - Increment/Decrement active count for
281 * PCM runtime components
282 * @rtd: ASoC PCM runtime that is activated
283 * @stream: Direction of the PCM stream
b6d6e9ea 284 * @action: Activate stream if 1. Deactivate if -1.
d9051d86
KM		 285 *
286 * Increments/Decrements the active count for all the DAIs and components
287 * attached to a PCM runtime.
288 * Should typically be called when a stream is opened.
289 *
290 * Must be called with the rtd->card->pcm_mutex being held
291 */
292void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
293 int stream, int action)
24894b76 294{
c840f769 295 struct snd_soc_dai *dai;
2e5894d7 296 int i;
24894b76 297
b7898396 298 snd_soc_dpcm_mutex_assert_held(rtd);
24894b76 299
dc829106
KM		 300 for_each_rtd_dais(rtd, i, dai)
301 snd_soc_dai_action(dai, stream, action);
24894b76 302}
d9051d86 303EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
24894b76 304
208a1589
LPC		 305/**
306 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
307 * @rtd: The ASoC PCM runtime that should be checked.
308 *
309 * This function checks whether the power down delay should be ignored for a
310 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
311 * been configured to ignore the delay, or if none of the components benefits
312 * from having the delay.
313 */
314bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
315{
fbb16563 316 struct snd_soc_component *component;
2e5894d7 317 bool ignore = true;
613fb500 318 int i;
2e5894d7 319
208a1589
LPC		 320 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
321 return true;
322
613fb500 323 for_each_rtd_components(rtd, i, component)
72c38184 324 ignore &= !component->driver->use_pmdown_time;
fbb16563 325
fbb16563 326 return ignore;
208a1589
LPC		 327}
328
90996f43
LPC		 329/**
330 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
331 * @substream: the pcm substream
332 * @hw: the hardware parameters
333 *
334 * Sets the substream runtime hardware parameters.
335 */
336int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
337 const struct snd_pcm_hardware *hw)
338{
56e749ba
KM		 339 substream->runtime->hw = *hw;
340
90996f43
LPC		 341 return 0;
342}
343EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
344
01d7584c 345/* DPCM stream event, send event to FE and all active BEs. */
23607025 346int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
01d7584c
LG		 347 int event)
348{
349 struct snd_soc_dpcm *dpcm;
350
b7898396
TI		 351 snd_soc_dpcm_mutex_assert_held(fe);
352
8d6258a4 353 for_each_dpcm_be(fe, dir, dpcm) {
01d7584c
LG		 354
355 struct snd_soc_pcm_runtime *be = dpcm->be;
356
103d84a3 357 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
01d7584c
LG		 358 be->dai_link->name, event, dir);
359
b1cd2e34
BG		 360 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
361 (be->dpcm[dir].users >= 1))
362 continue;
363
01d7584c
LG		 364 snd_soc_dapm_stream_event(be, dir, event);
365 }
366
367 snd_soc_dapm_stream_event(fe, dir, event);
368
369 return 0;
370}
371
2805b8bd
KM		 372static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
373 struct snd_pcm_hw_params *params)
374{
375 if (params) {
376 dai->rate = params_rate(params);
377 dai->channels = params_channels(params);
378 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
379 } else {
380 dai->rate = 0;
381 dai->channels = 0;
382 dai->sample_bits = 0;
383 }
384}
385
17841020
DA		 386static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
387 struct snd_soc_dai *soc_dai)
ddee627c 388{
0ceef681 389 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
ddee627c
LG		 390 int ret;
391
f8fc9ec5
KM		 392 if (!snd_soc_dai_active(soc_dai))
393 return 0;
394
fac110cb
KM		 395#define __soc_pcm_apply_symmetry(name, NAME) \
396 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
397 rtd->dai_link->symmetric_##name)) { \
398 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
399 #name, soc_dai->name); \
400 \
401 ret = snd_pcm_hw_constraint_single(substream->runtime, \
402 SNDRV_PCM_HW_PARAM_##NAME,\
403 soc_dai->name); \
404 if (ret < 0) { \
405 dev_err(soc_dai->dev, \
406 "ASoC: Unable to apply %s constraint: %d\n",\
407 #name, ret); \
408 return ret; \
409 } \
3635bf09 410 }
ddee627c 411
fac110cb
KM		 412 __soc_pcm_apply_symmetry(rate, RATE);
413 __soc_pcm_apply_symmetry(channels, CHANNELS);
414 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
ddee627c
LG		 415
416 return 0;
417}
418
3635bf09
NC		 419static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
420 struct snd_pcm_hw_params *params)
421{
0ceef681 422 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
2805b8bd 423 struct snd_soc_dai d;
c840f769 424 struct snd_soc_dai *dai;
19bdcc7a 425 struct snd_soc_dai *cpu_dai;
2805b8bd 426 unsigned int symmetry, i;
3635bf09 427
ee39d77e 428 d.name = __func__;
2805b8bd 429 soc_pcm_set_dai_params(&d, params);
3635bf09 430
1cacbac4
KM		 431#define __soc_pcm_params_symmetry(xxx) \
432 symmetry = rtd->dai_link->symmetric_##xxx; \
3a906721 433 for_each_rtd_dais(rtd, i, dai) \
1cacbac4 434 symmetry |= dai->driver->symmetric_##xxx; \
3a906721
KM		 435 \
436 if (symmetry) \
437 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
9c2ae363
KM		 438 if (!snd_soc_dai_is_dummy(cpu_dai) && \
439 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
ee39d77e
KM		 440 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
441 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
3a906721 442 return -EINVAL; \
19bdcc7a 443 }
ddee627c 444
3a906721
KM		 445 /* reject unmatched parameters when applying symmetry */
446 __soc_pcm_params_symmetry(rate);
447 __soc_pcm_params_symmetry(channels);
448 __soc_pcm_params_symmetry(sample_bits);
ddee627c
LG		 449
450 return 0;
451}
452
68cbc557 453static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
62e5f676 454{
0ceef681 455 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
62e5f676 456 struct snd_soc_dai_link *link = rtd->dai_link;
c840f769 457 struct snd_soc_dai *dai;
2e5894d7 458 unsigned int symmetry, i;
62e5f676 459
f14654dd 460 symmetry = link->symmetric_rate ||
19bdcc7a 461 link->symmetric_channels ||
f14654dd 462 link->symmetric_sample_bits;
19bdcc7a 463
c840f769 464 for_each_rtd_dais(rtd, i, dai)
2e5894d7 465 symmetry = symmetry ||
f14654dd 466 dai->driver->symmetric_rate ||
c840f769 467 dai->driver->symmetric_channels ||
f14654dd 468 dai->driver->symmetric_sample_bits;
2e5894d7 469
68cbc557
KM		 470 if (symmetry)
471 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
62e5f676
LPC		 472}
473
2e5894d7 474static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
58ba9b25 475{
0ceef681 476 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
c6068d3a 477 int ret;
58ba9b25
MB		 478
479 if (!bits)
480 return;
481
0e2a3751
LPC		 482 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
483 if (ret != 0)
484 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
485 bits, ret);
58ba9b25
MB		 486}
487
c8dd1fec
BC		 488static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
489{
0ceef681 490 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
19bdcc7a 491 struct snd_soc_dai *cpu_dai;
2e5894d7 492 struct snd_soc_dai *codec_dai;
57be9206 493 int stream = substream->stream;
2e5894d7 494 int i;
19bdcc7a 495 unsigned int bits = 0, cpu_bits = 0;
c8dd1fec 496
a4be4187 497 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2bc3e1f2 498 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
57be9206
KM		 499
500 if (pcm_codec->sig_bits == 0) {
501 bits = 0;
502 break;
2e5894d7 503 }
57be9206 504 bits = max(pcm_codec->sig_bits, bits);
c8dd1fec
BC		 505 }
506
a4be4187 507 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2bc3e1f2 508 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
19bdcc7a
SN		 509
510 if (pcm_cpu->sig_bits == 0) {
511 cpu_bits = 0;
512 break;
513 }
514 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
515 }
57be9206 516
2e5894d7
BC		 517 soc_pcm_set_msb(substream, bits);
518 soc_pcm_set_msb(substream, cpu_bits);
c8dd1fec
BC		 519}
520
f6c04af5
KM		 521static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
522{
523 hw->rates = UINT_MAX;
524 hw->rate_min = 0;
525 hw->rate_max = UINT_MAX;
6cb56a45
KM		 526 hw->channels_min = 0;
527 hw->channels_max = UINT_MAX;
debc71f2 528 hw->formats = ULLONG_MAX;
f6c04af5
KM		 529}
530
531static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
532 struct snd_soc_pcm_stream *p)
533{
534 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
535
536 /* setup hw->rate_min/max via hw->rates first */
537 snd_pcm_hw_limit_rates(hw);
538
539 /* update hw->rate_min/max by snd_soc_pcm_stream */
540 hw->rate_min = max(hw->rate_min, p->rate_min);
541 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
542}
543
6cb56a45
KM		 544static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
545 struct snd_soc_pcm_stream *p)
546{
547 hw->channels_min = max(hw->channels_min, p->channels_min);
548 hw->channels_max = min(hw->channels_max, p->channels_max);
549}
550
debc71f2
KM		 551static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
552 struct snd_soc_pcm_stream *p)
553{
554 hw->formats &= p->formats;
555}
556
5854a464
SH		 557/**
558 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
559 * @rtd: ASoC PCM runtime
560 * @hw: PCM hardware parameters (output)
561 * @stream: Direction of the PCM stream
562 *
563 * Calculates the subset of stream parameters supported by all DAIs
564 * associated with the PCM stream.
565 */
566int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
567 struct snd_pcm_hardware *hw, int stream)
bd477c31 568{
0b7990e3 569 struct snd_soc_dai *codec_dai;
19bdcc7a 570 struct snd_soc_dai *cpu_dai;
2e5894d7
BC		 571 struct snd_soc_pcm_stream *codec_stream;
572 struct snd_soc_pcm_stream *cpu_stream;
19bdcc7a 573 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
2e5894d7 574 int i;
78e45c99 575
f6c04af5
KM		 576 soc_pcm_hw_init(hw);
577
19bdcc7a 578 /* first calculate min/max only for CPUs in the DAI link */
a4be4187 579 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
0e9cf4c4
BL		 580
581 /*
582 * Skip CPUs which don't support the current stream type.
583 * Otherwise, since the rate, channel, and format values will
584 * zero in that case, we would have no usable settings left,
585 * causing the resulting setup to fail.
0e9cf4c4 586 */
5854a464 587 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
0e9cf4c4
BL		 588 continue;
589
19bdcc7a
SN		 590 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
591
6cb56a45 592 soc_pcm_hw_update_chan(hw, cpu_stream);
f6c04af5 593 soc_pcm_hw_update_rate(hw, cpu_stream);
debc71f2 594 soc_pcm_hw_update_format(hw, cpu_stream);
19bdcc7a 595 }
6cb56a45
KM		 596 cpu_chan_min = hw->channels_min;
597 cpu_chan_max = hw->channels_max;
78e45c99 598
19bdcc7a 599 /* second calculate min/max only for CODECs in the DAI link */
a4be4187 600 for_each_rtd_codec_dais(rtd, i, codec_dai) {
cde79035
RW		 601
602 /*
603 * Skip CODECs which don't support the current stream type.
604 * Otherwise, since the rate, channel, and format values will
605 * zero in that case, we would have no usable settings left,
606 * causing the resulting setup to fail.
cde79035 607 */
25c2f515 608 if (!snd_soc_dai_stream_valid(codec_dai, stream))
cde79035
RW		 609 continue;
610
acf253c1
KM		 611 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
612
6cb56a45 613 soc_pcm_hw_update_chan(hw, codec_stream);
f6c04af5 614 soc_pcm_hw_update_rate(hw, codec_stream);
debc71f2 615 soc_pcm_hw_update_format(hw, codec_stream);
2e5894d7
BC		 616 }
617
5854a464 618 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
6cb56a45 619 if (!hw->channels_min)
5854a464
SH		 620 return -EINVAL;
621
2e5894d7
BC		 622 /*
623 * chan min/max cannot be enforced if there are multiple CODEC DAIs
19bdcc7a 624 * connected to CPU DAI(s), use CPU DAI's directly and let
2e5894d7
BC		 625 * channel allocation be fixed up later
626 */
3989ade2 627 if (rtd->dai_link->num_codecs > 1) {
6cb56a45
KM		 628 hw->channels_min = cpu_chan_min;
629 hw->channels_max = cpu_chan_max;
2e5894d7
BC		 630 }
631
5854a464
SH		 632 return 0;
633}
634EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
635
636static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
637{
638 struct snd_pcm_hardware *hw = &substream->runtime->hw;
0ceef681 639 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
5854a464
SH		 640 u64 formats = hw->formats;
641
642 /*
643 * At least one CPU and one CODEC should match. Otherwise, we should
644 * have bailed out on a higher level, since there would be no CPU or
645 * CODEC to support the transfer direction in that case.
646 */
647 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
648
649 if (formats)
650 hw->formats &= formats;
bd477c31
LPC		 651}
652
dd03907b 653static int soc_pcm_components_open(struct snd_pcm_substream *substream)
e7ecfdb7 654{
0ceef681 655 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
e7ecfdb7 656 struct snd_soc_component *component;
613fb500 657 int i, ret = 0;
e7ecfdb7 658
613fb500 659 for_each_rtd_components(rtd, i, component) {
51aff91a 660 ret = snd_soc_component_module_get_when_open(component, substream);
bcae1631 661 if (ret < 0)
d2aaa8d8 662 break;
e7ecfdb7 663
ae2f4849 664 ret = snd_soc_component_open(component, substream);
bcae1631 665 if (ret < 0)
d2aaa8d8 666 break;
e7ecfdb7 667 }
dd03907b 668
d2aaa8d8 669 return ret;
e7ecfdb7
KM		 670}
671
51aff91a
KM		 672static int soc_pcm_components_close(struct snd_pcm_substream *substream,
673 int rollback)
244e2936 674{
0ceef681 675 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
244e2936 676 struct snd_soc_component *component;
33be10b5 677 int i, ret = 0;
244e2936 678
613fb500 679 for_each_rtd_components(rtd, i, component) {
33be10b5 680 int r = snd_soc_component_close(component, substream, rollback);
e82ebffc
KM		 681 if (r < 0)
682 ret = r; /* use last ret */
683
51aff91a 684 snd_soc_component_module_put_when_close(component, substream, rollback);
244e2936
CK		 685 }
686
3672beb8 687 return ret;
244e2936
CK		 688}
689
b7898396
TI		 690static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
691 struct snd_pcm_substream *substream, int rollback)
62c86d1d 692{
62c86d1d 693 struct snd_soc_component *component;
c840f769 694 struct snd_soc_dai *dai;
62c86d1d
KM		 695 int i;
696
b7898396 697 snd_soc_dpcm_mutex_assert_held(rtd);
62c86d1d 698
1da681e5 699 if (!rollback) {
140a4532 700 snd_soc_runtime_deactivate(rtd, substream->stream);
1da681e5
CL		 701 /* clear the corresponding DAIs parameters when going to be inactive */
702 for_each_rtd_dais(rtd, i, dai) {
703 if (snd_soc_dai_active(dai) == 0)
704 soc_pcm_set_dai_params(dai, NULL);
705
f0220575
SK		 706 if (snd_soc_dai_stream_active(dai, substream->stream) == 0) {
707 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
708 snd_soc_dai_digital_mute(dai, 1, substream->stream);
709 }
1da681e5
CL		 710 }
711 }
62c86d1d 712
c840f769 713 for_each_rtd_dais(rtd, i, dai)
140a4532 714 snd_soc_dai_shutdown(dai, substream, rollback);
62c86d1d 715
140a4532 716 snd_soc_link_shutdown(substream, rollback);
62c86d1d 717
140a4532 718 soc_pcm_components_close(substream, rollback);
62c86d1d 719
140a4532 720 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
62c86d1d
KM		 721
722 for_each_rtd_components(rtd, i, component)
b3dea624 723 if (!snd_soc_component_active(component))
62c86d1d
KM		 724 pinctrl_pm_select_sleep_state(component->dev);
725
726 return 0;
727}
728
140a4532
KM		 729/*
730 * Called by ALSA when a PCM substream is closed. Private data can be
731 * freed here. The cpu DAI, codec DAI, machine and components are also
732 * shutdown.
733 */
b7898396
TI		 734static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
735 struct snd_pcm_substream *substream)
736{
737 return soc_pcm_clean(rtd, substream, 0);
738}
739
740/* PCM close ops for non-DPCM streams */
140a4532
KM		 741static int soc_pcm_close(struct snd_pcm_substream *substream)
742{
b7898396
TI		 743 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
744
745 snd_soc_dpcm_mutex_lock(rtd);
6bbabd28 746 __soc_pcm_close(rtd, substream);
b7898396
TI		 747 snd_soc_dpcm_mutex_unlock(rtd);
748 return 0;
140a4532
KM		 749}
750
c393281a
KM		 751static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
752{
753 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
754 struct snd_pcm_hardware *hw = &substream->runtime->hw;
755 const char *name_cpu = soc_cpu_dai_name(rtd);
756 const char *name_codec = soc_codec_dai_name(rtd);
757 const char *err_msg;
758 struct device *dev = rtd->dev;
759
760 err_msg = "rates";
761 if (!hw->rates)
762 goto config_err;
763
764 err_msg = "formats";
765 if (!hw->formats)
766 goto config_err;
767
768 err_msg = "channels";
769 if (!hw->channels_min || !hw->channels_max ||
770 hw->channels_min > hw->channels_max)
771 goto config_err;
772
773 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
774 name_cpu);
775 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
776 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
777 hw->channels_max);
778 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
779 hw->rate_max);
780
781 return 0;
782
783config_err:
784 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
785 name_codec, name_cpu, err_msg);
786 return -EINVAL;
787}
788
ddee627c
LG		 789/*
790 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
791 * then initialized and any private data can be allocated. This also calls
ef050bec 792 * startup for the cpu DAI, component, machine and codec DAI.
ddee627c 793 */
b7898396
TI		 794static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
795 struct snd_pcm_substream *substream)
ddee627c 796{
90be711e 797 struct snd_soc_component *component;
c840f769 798 struct snd_soc_dai *dai;
244e2936 799 int i, ret = 0;
ddee627c 800
b7898396
TI		 801 snd_soc_dpcm_mutex_assert_held(rtd);
802
76c39e86
KM		 803 for_each_rtd_components(rtd, i, component)
804 pinctrl_pm_select_default_state(component->dev);
90be711e 805
939a5cfb
KM		 806 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
807 if (ret < 0)
b7898396 808 goto err;
ddee627c 809
5d9fa03e
KM		 810 ret = soc_pcm_components_open(substream);
811 if (ret < 0)
140a4532 812 goto err;
5d9fa03e 813
7cf3c5b4 814 ret = snd_soc_link_startup(substream);
a5e6c109 815 if (ret < 0)
140a4532 816 goto err;
5d9fa03e 817
ddee627c 818 /* startup the audio subsystem */
c840f769
KM		 819 for_each_rtd_dais(rtd, i, dai) {
820 ret = snd_soc_dai_startup(dai, substream);
ce820145 821 if (ret < 0)
140a4532 822 goto err;
ddee627c
LG		 823 }
824
01d7584c
LG		 825 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
826 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
827 goto dynamic;
828
ddee627c 829 /* Check that the codec and cpu DAIs are compatible */
2e5894d7
BC		 830 soc_pcm_init_runtime_hw(substream);
831
68cbc557 832 soc_pcm_update_symmetry(substream);
62e5f676 833
c393281a
KM		 834 ret = soc_hw_sanity_check(substream);
835 if (ret < 0)
140a4532 836 goto err;
ddee627c 837
c8dd1fec 838 soc_pcm_apply_msb(substream);
58ba9b25 839
ddee627c 840 /* Symmetry only applies if we've already got an active stream. */
c840f769 841 for_each_rtd_dais(rtd, i, dai) {
f8fc9ec5
KM		 842 ret = soc_pcm_apply_symmetry(substream, dai);
843 if (ret != 0)
844 goto err;
ddee627c 845 }
01d7584c 846dynamic:
24894b76 847 snd_soc_runtime_activate(rtd, substream->stream);
8e7875ae 848 ret = 0;
140a4532 849err:
04110728 850 if (ret < 0)
b7898396 851 soc_pcm_clean(rtd, substream, 1);
d6652ef8 852
04110728 853 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 854}
855
b7898396
TI		 856/* PCM open ops for non-DPCM streams */
857static int soc_pcm_open(struct snd_pcm_substream *substream)
858{
859 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
860 int ret;
861
862 snd_soc_dpcm_mutex_lock(rtd);
863 ret = __soc_pcm_open(rtd, substream);
864 snd_soc_dpcm_mutex_unlock(rtd);
865 return ret;
866}
867
ddee627c
LG		 868/*
869 * Called by ALSA when the PCM substream is prepared, can set format, sample
870 * rate, etc. This function is non atomic and can be called multiple times,
871 * it can refer to the runtime info.
872 */
b7898396
TI		 873static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
874 struct snd_pcm_substream *substream)
ddee627c 875{
c840f769 876 struct snd_soc_dai *dai;
2e5894d7 877 int i, ret = 0;
ddee627c 878
b7898396 879 snd_soc_dpcm_mutex_assert_held(rtd);
ddee627c 880
7cf3c5b4 881 ret = snd_soc_link_prepare(substream);
a5e6c109 882 if (ret < 0)
44c1a75b 883 goto out;
ddee627c 884
4f39514f
KM		 885 ret = snd_soc_pcm_component_prepare(substream);
886 if (ret < 0)
887 goto out;
b8135864 888
d108c7fd 889 ret = snd_soc_pcm_dai_prepare(substream);
62462e01 890 if (ret < 0)
d108c7fd 891 goto out;
4beb8e10 892
ddee627c
LG		 893 /* cancel any delayed stream shutdown that is pending */
894 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
9bffb1fb
MLC		 895 rtd->pop_wait) {
896 rtd->pop_wait = 0;
ddee627c
LG		 897 cancel_delayed_work(&rtd->delayed_work);
898 }
899
d9b0951b
LG		 900 snd_soc_dapm_stream_event(rtd, substream->stream,
901 SND_SOC_DAPM_STREAM_START);
ddee627c 902
f0220575
SK		 903 for_each_rtd_dais(rtd, i, dai) {
904 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
905 snd_soc_dai_digital_mute(dai, 0, substream->stream);
906 }
ddee627c
LG		 907
908out:
04110728 909 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 910}
911
b7898396
TI		 912/* PCM prepare ops for non-DPCM streams */
913static int soc_pcm_prepare(struct snd_pcm_substream *substream)
914{
915 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
916 int ret;
917
918 snd_soc_dpcm_mutex_lock(rtd);
919 ret = __soc_pcm_prepare(rtd, substream);
920 snd_soc_dpcm_mutex_unlock(rtd);
921 return ret;
922}
923
2e5894d7
BC		 924static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
925 unsigned int mask)
926{
927 struct snd_interval *interval;
928 int channels = hweight_long(mask);
929
930 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
931 interval->min = channels;
932 interval->max = channels;
933}
934
b7898396
TI		 935static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
936 struct snd_pcm_substream *substream, int rollback)
ab49436e 937{
ab49436e
KM		 938 struct snd_soc_dai *dai;
939 int i;
940
b7898396 941 snd_soc_dpcm_mutex_assert_held(rtd);
ab49436e 942
a27b421f
RS		 943 /* run the stream event */
944 snd_soc_dapm_stream_stop(rtd, substream->stream);
945
ab49436e 946 /* free any machine hw params */
4662c596 947 snd_soc_link_hw_free(substream, rollback);
ab49436e
KM		 948
949 /* free any component resources */
4662c596 950 snd_soc_pcm_component_hw_free(substream, rollback);
ab49436e
KM		 951
952 /* now free hw params for the DAIs */
121966d0
KM		 953 for_each_rtd_dais(rtd, i, dai)
954 if (snd_soc_dai_stream_valid(dai, substream->stream))
955 snd_soc_dai_hw_free(dai, substream, rollback);
ab49436e 956
ab49436e
KM		 957 return 0;
958}
959
4662c596
KM		 960/*
961 * Frees resources allocated by hw_params, can be called multiple times
962 */
b7898396
TI		 963static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
964 struct snd_pcm_substream *substream)
965{
966 return soc_pcm_hw_clean(rtd, substream, 0);
967}
968
969/* hw_free PCM ops for non-DPCM streams */
4662c596
KM		 970static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
971{
b7898396
TI		 972 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
973 int ret;
974
975 snd_soc_dpcm_mutex_lock(rtd);
976 ret = __soc_pcm_hw_free(rtd, substream);
977 snd_soc_dpcm_mutex_unlock(rtd);
978 return ret;
4662c596
KM		 979}
980
ddee627c
LG		 981/*
982 * Called by ALSA when the hardware params are set by application. This
983 * function can also be called multiple times and can allocate buffers
984 * (using snd_pcm_lib_* ). It's non-atomic.
985 */
b7898396
TI		 986static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
987 struct snd_pcm_substream *substream,
988 struct snd_pcm_hw_params *params)
ddee627c 989{
19bdcc7a 990 struct snd_soc_dai *cpu_dai;
0b7990e3 991 struct snd_soc_dai *codec_dai;
396b9079 992 struct snd_pcm_hw_params tmp_params;
244e2936 993 int i, ret = 0;
ddee627c 994
b7898396 995 snd_soc_dpcm_mutex_assert_held(rtd);
5cca5951
SW		 996
997 ret = soc_pcm_params_symmetry(substream, params);
998 if (ret)
999 goto out;
1000
7cf3c5b4 1001 ret = snd_soc_link_hw_params(substream, params);
a5e6c109 1002 if (ret < 0)
de9ad990 1003 goto out;
ddee627c 1004
a4be4187 1005 for_each_rtd_codec_dais(rtd, i, codec_dai) {
e15ff262 1006 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
2e5894d7 1007
cde79035
RW		 1008 /*
1009 * Skip CODECs which don't support the current stream type,
1010 * the idea being that if a CODEC is not used for the currently
1011 * set up transfer direction, it should not need to be
1012 * configured, especially since the configuration used might
1013 * not even be supported by that CODEC. There may be cases
1014 * however where a CODEC needs to be set up although it is
1015 * actually not being used for the transfer, e.g. if a
1016 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1017 * for the DAI link including a playback-only CODEC.
1018 * If this becomes necessary, we will have to augment the
1019 * machine driver setup with information on how to act, so
1020 * we can do the right thing here.
1021 */
1022 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1023 continue;
1024
2e5894d7 1025 /* copy params for each codec */
396b9079 1026 tmp_params = *params;
2e5894d7
BC		 1027
1028 /* fixup params based on TDM slot masks */
e15ff262 1029 if (tdm_mask)
396b9079 1030 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
2e5894d7 1031
aa6166c2 1032 ret = snd_soc_dai_hw_params(codec_dai, substream,
396b9079 1033 &tmp_params);
93e6958a 1034 if(ret < 0)
4662c596 1035 goto out;
ddee627c 1036
396b9079
CK		 1037 soc_pcm_set_dai_params(codec_dai, &tmp_params);
1038 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
ddee627c
LG		 1039 }
1040
a4be4187 1041 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
ac950278
BL		 1042 unsigned int ch_mask = 0;
1043 int j;
1044
0e9cf4c4
BL		 1045 /*
1046 * Skip CPUs which don't support the current stream
1047 * type. See soc_pcm_init_runtime_hw() for more details
1048 */
1049 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1050 continue;
1051
ac950278 1052 /* copy params for each cpu */
396b9079 1053 tmp_params = *params;
ac950278
BL		 1054
1055 if (!rtd->dai_link->codec_ch_maps)
1056 goto hw_params;
1057 /*
1058 * construct cpu channel mask by combining ch_mask of each
1059 * codec which maps to the cpu.
1060 */
1061 for_each_rtd_codec_dais(rtd, j, codec_dai) {
1062 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
1063 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
1064 }
1065
1066 /* fixup cpu channel number */
1067 if (ch_mask)
396b9079 1068 soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
ac950278
BL		 1069
1070hw_params:
396b9079 1071 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
19bdcc7a 1072 if (ret < 0)
4662c596 1073 goto out;
ddee627c 1074
19bdcc7a 1075 /* store the parameters for each DAI */
396b9079
CK		 1076 soc_pcm_set_dai_params(cpu_dai, &tmp_params);
1077 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
19bdcc7a 1078 }
ca58221d 1079
3a36a64a 1080 ret = snd_soc_pcm_component_hw_params(substream, params);
ddee627c 1081out:
04110728 1082 if (ret < 0)
b7898396 1083 soc_pcm_hw_clean(rtd, substream, 1);
ddee627c 1084
04110728 1085 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 1086}
1087
b7898396
TI		 1088/* hw_params PCM ops for non-DPCM streams */
1089static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1090 struct snd_pcm_hw_params *params)
1091{
1092 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1093 int ret;
1094
1095 snd_soc_dpcm_mutex_lock(rtd);
1096 ret = __soc_pcm_hw_params(rtd, substream, params);
1097 snd_soc_dpcm_mutex_unlock(rtd);
1098 return ret;
1099}
1100
356caf66
KM		 1101#define TRIGGER_MAX 3
1102static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1103 [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1104 snd_soc_link_trigger,
1105 snd_soc_pcm_component_trigger,
1106 snd_soc_pcm_dai_trigger,
1107 },
1108 [SND_SOC_TRIGGER_ORDER_LDC] = {
1109 snd_soc_link_trigger,
1110 snd_soc_pcm_dai_trigger,
1111 snd_soc_pcm_component_trigger,
1112 },
1113};
1114
4378f1fb
PU		 1115static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1116{
59dd33f8 1117 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
54fc4b72 1118 struct snd_soc_component *component;
356caf66 1119 int ret = 0, r = 0, i;
6374f493 1120 int rollback = 0;
356caf66
KM		 1121 int start = 0, stop = 0;
1122
1123 /*
1124 * select START/STOP sequence
1125 */
1126 for_each_rtd_components(rtd, i, component) {
1127 if (component->driver->trigger_start)
1128 start = component->driver->trigger_start;
1129 if (component->driver->trigger_stop)
1130 stop = component->driver->trigger_stop;
1131 }
1132 if (rtd->dai_link->trigger_start)
1133 start = rtd->dai_link->trigger_start;
1134 if (rtd->dai_link->trigger_stop)
1135 stop = rtd->dai_link->trigger_stop;
1136
1137 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1138 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX)
1139 return -EINVAL;
4378f1fb 1140
356caf66
KM		 1141 /*
1142 * START
1143 */
4378f1fb
PU		 1144 switch (cmd) {
1145 case SNDRV_PCM_TRIGGER_START:
1146 case SNDRV_PCM_TRIGGER_RESUME:
1147 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
356caf66
KM		 1148 for (i = 0; i < TRIGGER_MAX; i++) {
1149 r = trigger[start][i](substream, cmd, 0);
1150 if (r < 0)
54fc4b72 1151 break;
54fc4b72 1152 }
6374f493
KM		 1153 }
1154
356caf66
KM		 1155 /*
1156 * Rollback if START failed
1157 * find correspond STOP command
1158 */
1159 if (r < 0) {
1160 rollback = 1;
1161 ret = r;
6374f493
KM		 1162 switch (cmd) {
1163 case SNDRV_PCM_TRIGGER_START:
1164 cmd = SNDRV_PCM_TRIGGER_STOP;
1165 break;
1166 case SNDRV_PCM_TRIGGER_RESUME:
1167 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
836367be 1168 break;
6374f493
KM		 1169 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1170 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1171 break;
1172 }
1173 }
836367be 1174
356caf66
KM		 1175 /*
1176 * STOP
1177 */
6374f493 1178 switch (cmd) {
4378f1fb
PU		 1179 case SNDRV_PCM_TRIGGER_STOP:
1180 case SNDRV_PCM_TRIGGER_SUSPEND:
1181 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
356caf66
KM		 1182 for (i = TRIGGER_MAX; i > 0; i--) {
1183 r = trigger[stop][i - 1](substream, cmd, rollback);
1184 if (r < 0)
1185 ret = r;
59dd33f8 1186 }
4378f1fb
PU		 1187 }
1188
1189 return ret;
1190}
1191
ddee627c
LG		 1192/*
1193 * soc level wrapper for pointer callback
ef050bec 1194 * If cpu_dai, codec_dai, component driver has the delay callback, then
dd894f4c 1195 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
ddee627c
LG		 1196 */
1197static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1198{
ddee627c
LG		 1199 struct snd_pcm_runtime *runtime = substream->runtime;
1200 snd_pcm_uframes_t offset = 0;
2e5894d7 1201 snd_pcm_sframes_t codec_delay = 0;
19bdcc7a 1202 snd_pcm_sframes_t cpu_delay = 0;
ddee627c 1203
0035e256 1204 offset = snd_soc_pcm_component_pointer(substream);
b8135864 1205
403f830e 1206 /* should be called *after* snd_soc_pcm_component_pointer() */
8544f08c 1207 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
403f830e 1208 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
ddee627c 1209
dd894f4c 1210 runtime->delay = cpu_delay + codec_delay;
ddee627c
LG		 1211
1212 return offset;
1213}
1214
01d7584c
LG		 1215/* connect a FE and BE */
1216static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1217 struct snd_soc_pcm_runtime *be, int stream)
1218{
bbf7d3b1
PLB		 1219 struct snd_pcm_substream *fe_substream;
1220 struct snd_pcm_substream *be_substream;
01d7584c 1221 struct snd_soc_dpcm *dpcm;
b7898396
TI		 1222
1223 snd_soc_dpcm_mutex_assert_held(fe);
01d7584c
LG		 1224
1225 /* only add new dpcms */
8d6258a4 1226 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1227 if (dpcm->be == be && dpcm->fe == fe)
1228 return 0;
1229 }
1230
bbf7d3b1
PLB		 1231 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1232 be_substream = snd_soc_dpcm_get_substream(be, stream);
1233
1234 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1235 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1236 __func__);
1237 return -EINVAL;
1238 }
1239 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
4ccf0949 1240 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
bbf7d3b1
PLB		 1241 be_substream->pcm->nonatomic = 1;
1242 }
1243
fb6d679f 1244 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
01d7584c
LG		 1245 if (!dpcm)
1246 return -ENOMEM;
1247
1248 dpcm->be = be;
1249 dpcm->fe = fe;
01d7584c 1250 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
b7898396 1251 snd_soc_dpcm_stream_lock_irq(fe, stream);
01d7584c
LG		 1252 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1253 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
b7898396 1254 snd_soc_dpcm_stream_unlock_irq(fe, stream);
01d7584c 1255
7cc302d2 1256 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
01d7584c
LG		 1257 stream ? "capture" : "playback", fe->dai_link->name,
1258 stream ? "<-" : "->", be->dai_link->name);
1259
154dae87
KM		 1260 dpcm_create_debugfs_state(dpcm, stream);
1261
01d7584c
LG		 1262 return 1;
1263}
1264
1265/* reparent a BE onto another FE */
1266static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1267 struct snd_soc_pcm_runtime *be, int stream)
1268{
1269 struct snd_soc_dpcm *dpcm;
1270 struct snd_pcm_substream *fe_substream, *be_substream;
1271
1272 /* reparent if BE is connected to other FEs */
1273 if (!be->dpcm[stream].users)
1274 return;
1275
1276 be_substream = snd_soc_dpcm_get_substream(be, stream);
db8f91d4
SRM		 1277 if (!be_substream)
1278 return;
01d7584c 1279
d2e24d64 1280 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 1281 if (dpcm->fe == fe)
1282 continue;
1283
7cc302d2 1284 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
01d7584c
LG		 1285 stream ? "capture" : "playback",
1286 dpcm->fe->dai_link->name,
1287 stream ? "<-" : "->", dpcm->be->dai_link->name);
1288
1289 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1290 be_substream->runtime = fe_substream->runtime;
1291 break;
1292 }
1293}
1294
1295/* disconnect a BE and FE */
23607025 1296void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1297{
1298 struct snd_soc_dpcm *dpcm, *d;
9f620684 1299 LIST_HEAD(deleted_dpcms);
01d7584c 1300
b7898396
TI		 1301 snd_soc_dpcm_mutex_assert_held(fe);
1302
1303 snd_soc_dpcm_stream_lock_irq(fe, stream);
8d6258a4 1304 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
103d84a3 1305 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
01d7584c
LG		 1306 stream ? "capture" : "playback",
1307 dpcm->be->dai_link->name);
1308
1309 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1310 continue;
1311
7cc302d2 1312 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
01d7584c
LG		 1313 stream ? "capture" : "playback", fe->dai_link->name,
1314 stream ? "<-" : "->", dpcm->be->dai_link->name);
1315
1316 /* BEs still alive need new FE */
1317 dpcm_be_reparent(fe, dpcm->be, stream);
1318
1319 list_del(&dpcm->list_be);
9f620684
TI		 1320 list_move(&dpcm->list_fe, &deleted_dpcms);
1321 }
1322 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1323
1324 while (!list_empty(&deleted_dpcms)) {
1325 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1326 list_fe);
01d7584c 1327 list_del(&dpcm->list_fe);
9f620684 1328 dpcm_remove_debugfs_state(dpcm);
01d7584c
LG		 1329 kfree(dpcm);
1330 }
1331}
1332
1333/* get BE for DAI widget and stream */
1334static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1335 struct snd_soc_dapm_widget *widget, int stream)
1336{
1337 struct snd_soc_pcm_runtime *be;
93597fae 1338 struct snd_soc_dapm_widget *w;
7afecb30 1339 struct snd_soc_dai *dai;
1a497983 1340 int i;
01d7584c 1341
3c146465
LG		 1342 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1343
93597fae 1344 for_each_card_rtds(card, be) {
01d7584c 1345
93597fae
KM		 1346 if (!be->dai_link->no_pcm)
1347 continue;
35ea0655 1348
75459065
TI		 1349 if (!snd_soc_dpcm_get_substream(be, stream))
1350 continue;
1351
c840f769 1352 for_each_rtd_dais(be, i, dai) {
19bdcc7a 1353 w = snd_soc_dai_get_widget(dai, stream);
3c146465 1354
19bdcc7a
SN		 1355 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1356 w ? w->name : "(not set)");
2e5894d7 1357
19bdcc7a
SN		 1358 if (w == widget)
1359 return be;
1360 }
01d7584c
LG		 1361 }
1362
9d6ee365 1363 /* Widget provided is not a BE */
01d7584c
LG		 1364 return NULL;
1365}
1366
5edcf2a3 1367int widget_in_list(struct snd_soc_dapm_widget_list *list,
01d7584c
LG		 1368 struct snd_soc_dapm_widget *widget)
1369{
09e88f8a 1370 struct snd_soc_dapm_widget *w;
01d7584c
LG		 1371 int i;
1372
09e88f8a
KM		 1373 for_each_dapm_widgets(list, i, w)
1374 if (widget == w)
01d7584c 1375 return 1;
01d7584c
LG		 1376
1377 return 0;
1378}
5edcf2a3 1379EXPORT_SYMBOL_GPL(widget_in_list);
01d7584c 1380
d1a7af09 1381bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
5fdd022c
PS		 1382{
1383 struct snd_soc_card *card = widget->dapm->card;
1384 struct snd_soc_pcm_runtime *rtd;
c2cd8216 1385 int stream;
5fdd022c 1386
c2cd8216
KM		 1387 /* adjust dir to stream */
1388 if (dir == SND_SOC_DAPM_DIR_OUT)
1389 stream = SNDRV_PCM_STREAM_PLAYBACK;
1390 else
1391 stream = SNDRV_PCM_STREAM_CAPTURE;
5fdd022c 1392
027a4838
KM		 1393 rtd = dpcm_get_be(card, widget, stream);
1394 if (rtd)
1395 return true;
5fdd022c
PS		 1396
1397 return false;
1398}
d1a7af09 1399EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
5fdd022c 1400
23607025 1401int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1ce43acf 1402 int stream, struct snd_soc_dapm_widget_list **list)
01d7584c 1403{
c2233a26 1404 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
01d7584c
LG		 1405 int paths;
1406
3989ade2 1407 if (fe->dai_link->num_cpus > 1) {
6e1276a5
BL		 1408 dev_err(fe->dev,
1409 "%s doesn't support Multi CPU yet\n", __func__);
1410 return -EINVAL;
1411 }
1412
01d7584c 1413 /* get number of valid DAI paths and their widgets */
6742064a 1414 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
aa293777
SP		 1415 fe->card->component_chaining ?
1416 NULL : dpcm_end_walk_at_be);
01d7584c 1417
d479f00b
KM		 1418 if (paths > 0)
1419 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
01d7584c 1420 stream ? "capture" : "playback");
d479f00b
KM		 1421 else if (paths == 0)
1422 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1423 stream ? "capture" : "playback");
01d7584c 1424
01d7584c
LG		 1425 return paths;
1426}
1427
52645e33
KM		 1428void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1429{
1430 snd_soc_dapm_dai_free_widgets(list);
1431}
1432
8cce6569
GL		 1433static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1434 struct snd_soc_dapm_widget_list *list)
01d7584c 1435{
7afecb30 1436 struct snd_soc_dai *dai;
8cce6569
GL		 1437 unsigned int i;
1438
c840f769
KM		 1439 /* is there a valid DAI widget for this BE */
1440 for_each_rtd_dais(dpcm->be, i, dai) {
7931df9b 1441 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
8cce6569
GL		 1442
1443 /*
c840f769 1444 * The BE is pruned only if none of the dai
8cce6569
GL		 1445 * widgets are in the active list.
1446 */
1447 if (widget && widget_in_list(list, widget))
1448 return true;
1449 }
1450
8cce6569
GL		 1451 return false;
1452}
1453
1454static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1455 struct snd_soc_dapm_widget_list **list_)
1456{
1457 struct snd_soc_dpcm *dpcm;
01d7584c
LG		 1458 int prune = 0;
1459
1460 /* Destroy any old FE <--> BE connections */
8d6258a4 1461 for_each_dpcm_be(fe, stream, dpcm) {
8cce6569 1462 if (dpcm_be_is_active(dpcm, stream, *list_))
bed646dc 1463 continue;
01d7584c 1464
103d84a3 1465 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
01d7584c
LG		 1466 stream ? "capture" : "playback",
1467 dpcm->be->dai_link->name, fe->dai_link->name);
1468 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
a7e20444 1469 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
01d7584c
LG		 1470 prune++;
1471 }
1472
103d84a3 1473 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
01d7584c
LG		 1474 return prune;
1475}
1476
1477static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1478 struct snd_soc_dapm_widget_list **list_)
1479{
1480 struct snd_soc_card *card = fe->card;
1481 struct snd_soc_dapm_widget_list *list = *list_;
1482 struct snd_soc_pcm_runtime *be;
09e88f8a 1483 struct snd_soc_dapm_widget *widget;
0d3a5178 1484 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
01d7584c
LG		 1485 int i, new = 0, err;
1486
6932b20d 1487 /* don't connect if FE is not running */
0d3a5178 1488 if (!fe_substream->runtime && !fe->fe_compr)
6932b20d
KM		 1489 return new;
1490
01d7584c 1491 /* Create any new FE <--> BE connections */
09e88f8a 1492 for_each_dapm_widgets(list, i, widget) {
01d7584c 1493
09e88f8a 1494 switch (widget->id) {
4616274d 1495 case snd_soc_dapm_dai_in:
c5b8540d
KC		 1496 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1497 continue;
1498 break;
4616274d 1499 case snd_soc_dapm_dai_out:
c5b8540d
KC		 1500 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1501 continue;
4616274d
MB		 1502 break;
1503 default:
01d7584c 1504 continue;
4616274d 1505 }
01d7584c
LG		 1506
1507 /* is there a valid BE rtd for this widget */
09e88f8a 1508 be = dpcm_get_be(card, widget, stream);
01d7584c 1509 if (!be) {
b6eabd24
SW		 1510 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1511 widget->name);
01d7584c
LG		 1512 continue;
1513 }
1514
9609cfcd
PLB		 1515 /*
1516 * Filter for systems with 'component_chaining' enabled.
1517 * This helps to avoid unnecessary re-configuration of an
1518 * already active BE on such systems.
1519 */
1520 if (fe->card->component_chaining &&
1521 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
0c25db3f
SP		 1522 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1523 continue;
1524
01d7584c
LG		 1525 /* newly connected FE and BE */
1526 err = dpcm_be_connect(fe, be, stream);
1527 if (err < 0) {
103d84a3 1528 dev_err(fe->dev, "ASoC: can't connect %s\n",
09e88f8a 1529 widget->name);
01d7584c
LG		 1530 break;
1531 } else if (err == 0) /* already connected */
1532 continue;
1533
1534 /* new */
a7e20444 1535 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
01d7584c
LG		 1536 new++;
1537 }
1538
103d84a3 1539 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
01d7584c
LG		 1540 return new;
1541}
1542
1543/*
1544 * Find the corresponding BE DAIs that source or sink audio to this
1545 * FE substream.
1546 */
23607025 1547int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
01d7584c
LG		 1548 int stream, struct snd_soc_dapm_widget_list **list, int new)
1549{
1550 if (new)
1551 return dpcm_add_paths(fe, stream, list);
1552 else
1553 return dpcm_prune_paths(fe, stream, list);
1554}
1555
23607025 1556void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1557{
1558 struct snd_soc_dpcm *dpcm;
1559
8d6258a4 1560 for_each_dpcm_be(fe, stream, dpcm)
a7e20444 1561 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1562}
1563
531590bb
KM		 1564void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1565 int do_hw_free, struct snd_soc_dpcm *last)
01d7584c
LG		 1566{
1567 struct snd_soc_dpcm *dpcm;
1568
1569 /* disable any enabled and non active backends */
8d6258a4 1570 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1571 struct snd_soc_pcm_runtime *be = dpcm->be;
1572 struct snd_pcm_substream *be_substream =
1573 snd_soc_dpcm_get_substream(be, stream);
1574
531590bb
KM		 1575 if (dpcm == last)
1576 return;
1577
1578 /* is this op for this BE ? */
1579 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1580 continue;
1581
1db19c15 1582 if (be->dpcm[stream].users == 0) {
103d84a3 1583 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1584 stream ? "capture" : "playback",
1585 be->dpcm[stream].state);
1db19c15
KM		 1586 continue;
1587 }
01d7584c
LG		 1588
1589 if (--be->dpcm[stream].users != 0)
1590 continue;
1591
531590bb
KM		 1592 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1593 if (!do_hw_free)
1594 continue;
1595
1596 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
b7898396 1597 __soc_pcm_hw_free(be, be_substream);
531590bb
KM		 1598 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1599 }
1600 }
01d7584c 1601
b7898396 1602 __soc_pcm_close(be, be_substream);
01d7584c
LG		 1603 be_substream->runtime = NULL;
1604 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1605 }
1606}
1607
23607025 1608int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c 1609{
0d3a5178 1610 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
06aaeb87 1611 struct snd_soc_pcm_runtime *be;
01d7584c
LG		 1612 struct snd_soc_dpcm *dpcm;
1613 int err, count = 0;
1614
1615 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
8d6258a4 1616 for_each_dpcm_be(fe, stream, dpcm) {
06aaeb87 1617 struct snd_pcm_substream *be_substream;
01d7584c 1618
06aaeb87
KM		 1619 be = dpcm->be;
1620 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c 1621
2062b4c5
RKAL		 1622 if (!be_substream) {
1623 dev_err(be->dev, "ASoC: no backend %s stream\n",
1624 stream ? "capture" : "playback");
1625 continue;
1626 }
1627
01d7584c
LG		 1628 /* is this op for this BE ? */
1629 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1630 continue;
1631
1632 /* first time the dpcm is open ? */
1db19c15 1633 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
103d84a3 1634 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
01d7584c
LG		 1635 stream ? "capture" : "playback",
1636 be->dpcm[stream].state);
1db19c15
KM		 1637 continue;
1638 }
01d7584c
LG		 1639
1640 if (be->dpcm[stream].users++ != 0)
1641 continue;
1642
1643 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1644 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1645 continue;
1646
2062b4c5
RKAL		 1647 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1648 stream ? "capture" : "playback", be->dai_link->name);
01d7584c 1649
0d3a5178 1650 be_substream->runtime = fe_substream->runtime;
b7898396 1651 err = __soc_pcm_open(be, be_substream);
01d7584c 1652 if (err < 0) {
01d7584c
LG		 1653 be->dpcm[stream].users--;
1654 if (be->dpcm[stream].users < 0)
103d84a3 1655 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
01d7584c
LG		 1656 stream ? "capture" : "playback",
1657 be->dpcm[stream].state);
1658
1659 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1660 goto unwind;
1661 }
848aedfd 1662 be->dpcm[stream].be_start = 0;
01d7584c
LG		 1663 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1664 count++;
1665 }
1666
1667 return count;
1668
1669unwind:
531590bb 1670 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
01d7584c 1671
04110728 1672 return soc_pcm_ret(fe, err);
01d7584c
LG		 1673}
1674
5f53898a
KM		 1675static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1676{
1677 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1678 struct snd_pcm_runtime *runtime = substream->runtime;
1679 struct snd_pcm_hardware *hw = &runtime->hw;
1680 struct snd_soc_dai *dai;
1681 int stream = substream->stream;
083a25b1 1682 u64 formats = hw->formats;
5f53898a
KM		 1683 int i;
1684
1685 soc_pcm_hw_init(hw);
1686
083a25b1
SW		 1687 if (formats)
1688 hw->formats &= formats;
1689
5f53898a
KM		 1690 for_each_rtd_cpu_dais(fe, i, dai) {
1691 struct snd_soc_pcm_stream *cpu_stream;
1692
1693 /*
1694 * Skip CPUs which don't support the current stream
1695 * type. See soc_pcm_init_runtime_hw() for more details
1696 */
1697 if (!snd_soc_dai_stream_valid(dai, stream))
1698 continue;
1699
1700 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1701
1702 soc_pcm_hw_update_rate(hw, cpu_stream);
1703 soc_pcm_hw_update_chan(hw, cpu_stream);
1704 soc_pcm_hw_update_format(hw, cpu_stream);
1705 }
1706
1707}
1708
1b8cb123 1709static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
b073ed4e 1710{
0ceef681 1711 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1712 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1713 struct snd_pcm_hardware *hw = &runtime->hw;
b073ed4e 1714 struct snd_soc_dpcm *dpcm;
7afecb30 1715 struct snd_soc_dai *dai;
b073ed4e
KM		 1716 int stream = substream->stream;
1717
1718 if (!fe->dai_link->dpcm_merged_format)
435ffb76 1719 return;
b073ed4e
KM		 1720
1721 /*
1722 * It returns merged BE codec format
1723 * if FE want to use it (= dpcm_merged_format)
1724 */
1725
8d6258a4 1726 for_each_dpcm_be(fe, stream, dpcm) {
b073ed4e 1727 struct snd_soc_pcm_runtime *be = dpcm->be;
b073ed4e
KM		 1728 struct snd_soc_pcm_stream *codec_stream;
1729 int i;
1730
a4be4187 1731 for_each_rtd_codec_dais(be, i, dai) {
4febced1
JB		 1732 /*
1733 * Skip CODECs which don't support the current stream
1734 * type. See soc_pcm_init_runtime_hw() for more details
1735 */
7afecb30 1736 if (!snd_soc_dai_stream_valid(dai, stream))
4febced1
JB		 1737 continue;
1738
acf253c1 1739 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
b073ed4e 1740
debc71f2 1741 soc_pcm_hw_update_format(hw, codec_stream);
b073ed4e
KM		 1742 }
1743 }
b073ed4e
KM		 1744}
1745
1b8cb123 1746static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
f4c277b8 1747{
0ceef681 1748 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1749 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1750 struct snd_pcm_hardware *hw = &runtime->hw;
f4c277b8
JW		 1751 struct snd_soc_dpcm *dpcm;
1752 int stream = substream->stream;
1753
1754 if (!fe->dai_link->dpcm_merged_chan)
1755 return;
1756
f4c277b8
JW		 1757 /*
1758 * It returns merged BE codec channel;
1759 * if FE want to use it (= dpcm_merged_chan)
1760 */
1761
8d6258a4 1762 for_each_dpcm_be(fe, stream, dpcm) {
f4c277b8 1763 struct snd_soc_pcm_runtime *be = dpcm->be;
4f2bd18b 1764 struct snd_soc_pcm_stream *cpu_stream;
19bdcc7a
SN		 1765 struct snd_soc_dai *dai;
1766 int i;
4f2bd18b 1767
a4be4187 1768 for_each_rtd_cpu_dais(be, i, dai) {
0e9cf4c4
BL		 1769 /*
1770 * Skip CPUs which don't support the current stream
1771 * type. See soc_pcm_init_runtime_hw() for more details
1772 */
1773 if (!snd_soc_dai_stream_valid(dai, stream))
1774 continue;
1775
19bdcc7a 1776 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
4f2bd18b 1777
6cb56a45 1778 soc_pcm_hw_update_chan(hw, cpu_stream);
19bdcc7a 1779 }
4f2bd18b
JB		 1780
1781 /*
1782 * chan min/max cannot be enforced if there are multiple CODEC
1783 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1784 */
3989ade2 1785 if (be->dai_link->num_codecs == 1) {
9bdc573d
KM		 1786 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1787 asoc_rtd_to_codec(be, 0), stream);
f4c277b8 1788
6cb56a45 1789 soc_pcm_hw_update_chan(hw, codec_stream);
f4c277b8
JW		 1790 }
1791 }
1792}
1793
1b8cb123 1794static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
baacd8d1 1795{
0ceef681 1796 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1797 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1798 struct snd_pcm_hardware *hw = &runtime->hw;
baacd8d1
JB		 1799 struct snd_soc_dpcm *dpcm;
1800 int stream = substream->stream;
1801
1802 if (!fe->dai_link->dpcm_merged_rate)
1803 return;
1804
1805 /*
1806 * It returns merged BE codec channel;
1807 * if FE want to use it (= dpcm_merged_chan)
1808 */
1809
8d6258a4 1810 for_each_dpcm_be(fe, stream, dpcm) {
baacd8d1 1811 struct snd_soc_pcm_runtime *be = dpcm->be;
c840f769 1812 struct snd_soc_pcm_stream *pcm;
7afecb30 1813 struct snd_soc_dai *dai;
baacd8d1
JB		 1814 int i;
1815
c840f769 1816 for_each_rtd_dais(be, i, dai) {
baacd8d1 1817 /*
c840f769 1818 * Skip DAIs which don't support the current stream
baacd8d1
JB		 1819 * type. See soc_pcm_init_runtime_hw() for more details
1820 */
7afecb30 1821 if (!snd_soc_dai_stream_valid(dai, stream))
baacd8d1
JB		 1822 continue;
1823
c840f769 1824 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
baacd8d1 1825
f6c04af5 1826 soc_pcm_hw_update_rate(hw, pcm);
baacd8d1
JB		 1827 }
1828 }
1829}
1830
906c7d69
PL		 1831static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1832 int stream)
1833{
1834 struct snd_soc_dpcm *dpcm;
0ceef681 1835 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
19bdcc7a 1836 struct snd_soc_dai *fe_cpu_dai;
12ffd726 1837 int err = 0;
19bdcc7a 1838 int i;
906c7d69
PL		 1839
1840 /* apply symmetry for FE */
68cbc557 1841 soc_pcm_update_symmetry(fe_substream);
906c7d69 1842
a4be4187 1843 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
19bdcc7a 1844 /* Symmetry only applies if we've got an active stream. */
f8fc9ec5
KM		 1845 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1846 if (err < 0)
bbd2bac8 1847 goto error;
906c7d69
PL		 1848 }
1849
1850 /* apply symmetry for BE */
8d6258a4 1851 for_each_dpcm_be(fe, stream, dpcm) {
906c7d69
PL		 1852 struct snd_soc_pcm_runtime *be = dpcm->be;
1853 struct snd_pcm_substream *be_substream =
1854 snd_soc_dpcm_get_substream(be, stream);
6246f283 1855 struct snd_soc_pcm_runtime *rtd;
c840f769 1856 struct snd_soc_dai *dai;
906c7d69 1857
6246f283
JB		 1858 /* A backend may not have the requested substream */
1859 if (!be_substream)
1860 continue;
1861
0ceef681 1862 rtd = asoc_substream_to_rtd(be_substream);
f1176614
JK		 1863 if (rtd->dai_link->be_hw_params_fixup)
1864 continue;
1865
68cbc557 1866 soc_pcm_update_symmetry(be_substream);
906c7d69
PL		 1867
1868 /* Symmetry only applies if we've got an active stream. */
c840f769 1869 for_each_rtd_dais(rtd, i, dai) {
f8fc9ec5
KM		 1870 err = soc_pcm_apply_symmetry(fe_substream, dai);
1871 if (err < 0)
bbd2bac8 1872 goto error;
906c7d69
PL		 1873 }
1874 }
bbd2bac8 1875error:
04110728 1876 return soc_pcm_ret(fe, err);
906c7d69
PL		 1877}
1878
01d7584c
LG		 1879static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1880{
0ceef681 1881 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c
LG		 1882 int stream = fe_substream->stream, ret = 0;
1883
ea9d0d77 1884 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 1885
25c2f515 1886 ret = dpcm_be_dai_startup(fe, stream);
06aaeb87 1887 if (ret < 0)
01d7584c 1888 goto be_err;
01d7584c 1889
103d84a3 1890 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
01d7584c
LG		 1891
1892 /* start the DAI frontend */
b7898396 1893 ret = __soc_pcm_open(fe, fe_substream);
e4b044f4 1894 if (ret < 0)
01d7584c 1895 goto unwind;
01d7584c
LG		 1896
1897 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1898
4fe28461
KM		 1899 dpcm_runtime_setup_fe(fe_substream);
1900
1901 dpcm_runtime_setup_be_format(fe_substream);
1902 dpcm_runtime_setup_be_chan(fe_substream);
1903 dpcm_runtime_setup_be_rate(fe_substream);
01d7584c 1904
906c7d69 1905 ret = dpcm_apply_symmetry(fe_substream, stream);
01d7584c
LG		 1906
1907unwind:
8a01fbf0
KM		 1908 if (ret < 0)
1909 dpcm_be_dai_startup_unwind(fe, stream);
01d7584c 1910be_err:
ea9d0d77 1911 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
06aaeb87 1912
04110728 1913 return soc_pcm_ret(fe, ret);
01d7584c
LG		 1914}
1915
01d7584c
LG		 1916static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1917{
0ceef681 1918 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 1919 int stream = substream->stream;
1920
b7898396
TI		 1921 snd_soc_dpcm_mutex_assert_held(fe);
1922
ea9d0d77 1923 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1924
1925 /* shutdown the BEs */
25c2f515 1926 dpcm_be_dai_shutdown(fe, stream);
01d7584c 1927
103d84a3 1928 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
01d7584c
LG		 1929
1930 /* now shutdown the frontend */
b7898396 1931 __soc_pcm_close(fe, substream);
01d7584c 1932
bb9dd3ce
RS		 1933 /* run the stream stop event */
1934 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1935
01d7584c 1936 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
ea9d0d77 1937 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1938 return 0;
1939}
1940
f52366e6 1941void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1942{
1943 struct snd_soc_dpcm *dpcm;
1944
1945 /* only hw_params backends that are either sinks or sources
1946 * to this frontend DAI */
8d6258a4 1947 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1948
1949 struct snd_soc_pcm_runtime *be = dpcm->be;
1950 struct snd_pcm_substream *be_substream =
1951 snd_soc_dpcm_get_substream(be, stream);
1952
1953 /* is this op for this BE ? */
1954 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1955 continue;
1956
1957 /* only free hw when no longer used - check all FEs */
1958 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1959 continue;
1960
36fba62c
QZ		 1961 /* do not free hw if this BE is used by other FE */
1962 if (be->dpcm[stream].users > 1)
1963 continue;
1964
01d7584c
LG		 1965 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1966 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1967 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
08b27848 1968 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
5e82d2be
VK		 1969 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1970 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
01d7584c
LG		 1971 continue;
1972
103d84a3 1973 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
94d215cc 1974 be->dai_link->name);
01d7584c 1975
b7898396 1976 __soc_pcm_hw_free(be, be_substream);
01d7584c
LG		 1977
1978 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1979 }
01d7584c
LG		 1980}
1981
45c0a188 1982static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c 1983{
0ceef681 1984 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
f52366e6 1985 int stream = substream->stream;
01d7584c 1986
b7898396 1987 snd_soc_dpcm_mutex_lock(fe);
ea9d0d77 1988 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 1989
103d84a3 1990 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
01d7584c
LG		 1991
1992 /* call hw_free on the frontend */
b7898396 1993 soc_pcm_hw_clean(fe, substream, 0);
01d7584c
LG		 1994
1995 /* only hw_params backends that are either sinks or sources
1996 * to this frontend DAI */
f52366e6 1997 dpcm_be_dai_hw_free(fe, stream);
01d7584c
LG		 1998
1999 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
ea9d0d77 2000 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c 2001
b7898396 2002 snd_soc_dpcm_mutex_unlock(fe);
01d7584c
LG		 2003 return 0;
2004}
2005
23607025 2006int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c 2007{
33b6b94f
KM		 2008 struct snd_soc_pcm_runtime *be;
2009 struct snd_pcm_substream *be_substream;
01d7584c
LG		 2010 struct snd_soc_dpcm *dpcm;
2011 int ret;
2012
8d6258a4 2013 for_each_dpcm_be(fe, stream, dpcm) {
25106550
KM		 2014 struct snd_pcm_hw_params hw_params;
2015
33b6b94f
KM		 2016 be = dpcm->be;
2017 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c
LG		 2018
2019 /* is this op for this BE ? */
2020 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2021 continue;
2022
01d7584c 2023 /* copy params for each dpcm */
25106550 2024 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
01d7584c
LG		 2025 sizeof(struct snd_pcm_hw_params));
2026
2027 /* perform any hw_params fixups */
25106550 2028 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
0cbbf8a0
KM		 2029 if (ret < 0)
2030 goto unwind;
01d7584c 2031
ae061d2a 2032 /* copy the fixed-up hw params for BE dai */
25106550 2033 memcpy(&be->dpcm[stream].hw_params, &hw_params,
ae061d2a
LY		 2034 sizeof(struct snd_pcm_hw_params));
2035
b0639bd2
KM		 2036 /* only allow hw_params() if no connected FEs are running */
2037 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2038 continue;
2039
2040 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2042 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2043 continue;
2044
2045 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
94d215cc 2046 be->dai_link->name);
b0639bd2 2047
25106550 2048 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
cb11f79b 2049 if (ret < 0)
01d7584c 2050 goto unwind;
01d7584c
LG		 2051
2052 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2053 }
2054 return 0;
2055
2056unwind:
33b6b94f
KM		 2057 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2058 __func__, be->dai_link->name, ret);
2059
01d7584c 2060 /* disable any enabled and non active backends */
8d6258a4 2061 for_each_dpcm_be_rollback(fe, stream, dpcm) {
33b6b94f
KM		 2062 be = dpcm->be;
2063 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c
LG		 2064
2065 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2066 continue;
2067
2068 /* only allow hw_free() if no connected FEs are running */
2069 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2070 continue;
2071
2072 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2073 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2074 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2075 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2076 continue;
2077
b7898396 2078 __soc_pcm_hw_free(be, be_substream);
01d7584c
LG		 2079 }
2080
2081 return ret;
2082}
2083
45c0a188
MB		 2084static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2085 struct snd_pcm_hw_params *params)
01d7584c 2086{
0ceef681 2087 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 2088 int ret, stream = substream->stream;
2089
b7898396 2090 snd_soc_dpcm_mutex_lock(fe);
ea9d0d77 2091 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 2092
25c2f515 2093 memcpy(&fe->dpcm[stream].hw_params, params,
01d7584c 2094 sizeof(struct snd_pcm_hw_params));
25c2f515 2095 ret = dpcm_be_dai_hw_params(fe, stream);
33b6b94f 2096 if (ret < 0)
01d7584c 2097 goto out;
01d7584c 2098
103d84a3 2099 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
01d7584c
LG		 2100 fe->dai_link->name, params_rate(params),
2101 params_channels(params), params_format(params));
2102
2103 /* call hw_params on the frontend */
b7898396 2104 ret = __soc_pcm_hw_params(fe, substream, params);
cb11f79b 2105 if (ret < 0)
01d7584c 2106 dpcm_be_dai_hw_free(fe, stream);
cb11f79b 2107 else
01d7584c
LG		 2108 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2109
2110out:
ea9d0d77 2111 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
b7898396 2112 snd_soc_dpcm_mutex_unlock(fe);
33b6b94f 2113
04110728 2114 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2115}
2116
23607025 2117int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
45c0a188 2118 int cmd)
01d7584c 2119{
db3aa39c 2120 struct snd_soc_pcm_runtime *be;
9995c1d0 2121 bool pause_stop_transition;
01d7584c 2122 struct snd_soc_dpcm *dpcm;
b2ae8066 2123 unsigned long flags;
01d7584c
LG		 2124 int ret = 0;
2125
8d6258a4 2126 for_each_dpcm_be(fe, stream, dpcm) {
db3aa39c 2127 struct snd_pcm_substream *be_substream;
01d7584c 2128
db3aa39c
KM		 2129 be = dpcm->be;
2130 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c 2131
3c75c0ea 2132 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
b2ae8066 2133
01d7584c
LG		 2134 /* is this op for this BE ? */
2135 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
b2ae8066 2136 goto next;
01d7584c 2137
a9faca15
KM		 2138 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2139 be->dai_link->name, cmd);
2140
01d7584c
LG		 2141 switch (cmd) {
2142 case SNDRV_PCM_TRIGGER_START:
848aedfd
PLB		 2143 if (!be->dpcm[stream].be_start &&
2144 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
21fca8bd 2145 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
3202e2f5 2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2147 goto next;
6479f758 2148
848aedfd
PLB		 2149 be->dpcm[stream].be_start++;
2150 if (be->dpcm[stream].be_start != 1)
2151 goto next;
2152
374b50e2
PLB		 2153 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2154 ret = soc_pcm_trigger(be_substream,
2155 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2156 else
2157 ret = soc_pcm_trigger(be_substream,
2158 SNDRV_PCM_TRIGGER_START);
848aedfd
PLB		 2159 if (ret) {
2160 be->dpcm[stream].be_start--;
b2ae8066 2161 goto next;
848aedfd 2162 }
01d7584c 2163
3202e2f5 2164 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2165 break;
2166 case SNDRV_PCM_TRIGGER_RESUME:
3202e2f5 2167 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
b2ae8066 2168 goto next;
6479f758 2169
848aedfd
PLB		 2170 be->dpcm[stream].be_start++;
2171 if (be->dpcm[stream].be_start != 1)
2172 goto next;
2173
a9faca15 2174 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2175 if (ret) {
2176 be->dpcm[stream].be_start--;
b2ae8066 2177 goto next;
848aedfd 2178 }
01d7584c 2179
3202e2f5 2180 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2181 break;
2182 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
3aa1e96a
PLB		 2183 if (!be->dpcm[stream].be_start &&
2184 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
3aa1e96a 2185 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2186 goto next;
6479f758 2187
9995c1d0
PLB		 2188 fe->dpcm[stream].fe_pause = false;
2189 be->dpcm[stream].be_pause--;
2190
848aedfd
PLB		 2191 be->dpcm[stream].be_start++;
2192 if (be->dpcm[stream].be_start != 1)
2193 goto next;
2194
a9faca15 2195 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2196 if (ret) {
2197 be->dpcm[stream].be_start--;
b2ae8066 2198 goto next;
848aedfd 2199 }
01d7584c 2200
3202e2f5 2201 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2202 break;
2203 case SNDRV_PCM_TRIGGER_STOP:
21fca8bd 2204 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
3202e2f5 2205 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2206 goto next;
01d7584c 2207
848aedfd
PLB		 2208 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2209 be->dpcm[stream].be_start--;
2210
2211 if (be->dpcm[stream].be_start != 0)
b2ae8066 2212 goto next;
0c75fc71 2213
9995c1d0
PLB		 2214 pause_stop_transition = false;
2215 if (fe->dpcm[stream].fe_pause) {
2216 pause_stop_transition = true;
2217 fe->dpcm[stream].fe_pause = false;
2218 be->dpcm[stream].be_pause--;
2219 }
2220
2221 if (be->dpcm[stream].be_pause != 0)
2222 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2223 else
2224 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2225
848aedfd
PLB		 2226 if (ret) {
2227 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2228 be->dpcm[stream].be_start++;
9995c1d0
PLB		 2229 if (pause_stop_transition) {
2230 fe->dpcm[stream].fe_pause = true;
2231 be->dpcm[stream].be_pause++;
2232 }
b2ae8066 2233 goto next;
848aedfd 2234 }
01d7584c 2235
9995c1d0
PLB		 2236 if (be->dpcm[stream].be_pause != 0)
2237 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2238 else
2239 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2240
01d7584c
LG		 2241 break;
2242 case SNDRV_PCM_TRIGGER_SUSPEND:
3202e2f5 2243 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
b2ae8066 2244 goto next;
01d7584c 2245
848aedfd
PLB		 2246 be->dpcm[stream].be_start--;
2247 if (be->dpcm[stream].be_start != 0)
b2ae8066 2248 goto next;
01d7584c 2249
a9faca15 2250 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2251 if (ret) {
2252 be->dpcm[stream].be_start++;
b2ae8066 2253 goto next;
848aedfd 2254 }
01d7584c 2255
3202e2f5 2256 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
01d7584c
LG		 2257 break;
2258 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
3202e2f5 2259 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
b2ae8066 2260 goto next;
01d7584c 2261
9995c1d0
PLB		 2262 fe->dpcm[stream].fe_pause = true;
2263 be->dpcm[stream].be_pause++;
2264
848aedfd
PLB		 2265 be->dpcm[stream].be_start--;
2266 if (be->dpcm[stream].be_start != 0)
b2ae8066 2267 goto next;
01d7584c 2268
a9faca15 2269 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2270 if (ret) {
2271 be->dpcm[stream].be_start++;
b2ae8066 2272 goto next;
848aedfd 2273 }
01d7584c 2274
3202e2f5 2275 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
01d7584c
LG		 2276 break;
2277 }
b2ae8066
TI		 2278next:
2279 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2280 if (ret)
2281 break;
01d7584c 2282 }
04110728 2283 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2284}
2285EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2286
acbf2774
RS		 2287static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2288 int cmd, bool fe_first)
2289{
0ceef681 2290 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
acbf2774
RS		 2291 int ret;
2292
2293 /* call trigger on the frontend before the backend. */
2294 if (fe_first) {
2295 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2296 fe->dai_link->name, cmd);
2297
2298 ret = soc_pcm_trigger(substream, cmd);
2299 if (ret < 0)
2300 return ret;
2301
2302 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2303 return ret;
2304 }
2305
2306 /* call trigger on the frontend after the backend. */
2307 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2308 if (ret < 0)
2309 return ret;
2310
2311 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2312 fe->dai_link->name, cmd);
2313
2314 ret = soc_pcm_trigger(substream, cmd);
2315
2316 return ret;
2317}
2318
ea9d0d77 2319static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c 2320{
0ceef681 2321 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
acbf2774
RS		 2322 int stream = substream->stream;
2323 int ret = 0;
01d7584c
LG		 2324 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2325
2326 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2327
2328 switch (trigger) {
2329 case SND_SOC_DPCM_TRIGGER_PRE:
acbf2774
RS		 2330 switch (cmd) {
2331 case SNDRV_PCM_TRIGGER_START:
2332 case SNDRV_PCM_TRIGGER_RESUME:
2333 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
4c22b80f 2334 case SNDRV_PCM_TRIGGER_DRAIN:
acbf2774
RS		 2335 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2336 break;
2337 case SNDRV_PCM_TRIGGER_STOP:
2338 case SNDRV_PCM_TRIGGER_SUSPEND:
2339 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2340 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2341 break;
2342 default:
2343 ret = -EINVAL;
2344 break;
01d7584c 2345 }
01d7584c
LG		 2346 break;
2347 case SND_SOC_DPCM_TRIGGER_POST:
acbf2774
RS		 2348 switch (cmd) {
2349 case SNDRV_PCM_TRIGGER_START:
2350 case SNDRV_PCM_TRIGGER_RESUME:
2351 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
4c22b80f 2352 case SNDRV_PCM_TRIGGER_DRAIN:
acbf2774
RS		 2353 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2354 break;
2355 case SNDRV_PCM_TRIGGER_STOP:
2356 case SNDRV_PCM_TRIGGER_SUSPEND:
2357 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2358 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2359 break;
2360 default:
2361 ret = -EINVAL;
2362 break;
01d7584c 2363 }
01d7584c 2364 break;
07bf84aa
LG		 2365 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2366 /* bespoke trigger() - handles both FE and BEs */
2367
103d84a3 2368 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
07bf84aa
LG		 2369 fe->dai_link->name, cmd);
2370
30819358 2371 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
07bf84aa 2372 break;
01d7584c 2373 default:
103d84a3 2374 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
01d7584c
LG		 2375 fe->dai_link->name);
2376 ret = -EINVAL;
2377 goto out;
2378 }
2379
acbf2774
RS		 2380 if (ret < 0) {
2381 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2382 cmd, ret);
2383 goto out;
2384 }
2385
01d7584c
LG		 2386 switch (cmd) {
2387 case SNDRV_PCM_TRIGGER_START:
2388 case SNDRV_PCM_TRIGGER_RESUME:
2389 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2390 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2391 break;
2392 case SNDRV_PCM_TRIGGER_STOP:
2393 case SNDRV_PCM_TRIGGER_SUSPEND:
01d7584c
LG		 2394 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2395 break;
9f169b9f
PL		 2396 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2397 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2398 break;
01d7584c
LG		 2399 }
2400
2401out:
2402 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2403 return ret;
2404}
2405
ea9d0d77
TI		 2406static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2407{
0ceef681 2408 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
ea9d0d77
TI		 2409 int stream = substream->stream;
2410
2411 /* if FE's runtime_update is already set, we're in race;
2412 * process this trigger later at exit
2413 */
2414 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2415 fe->dpcm[stream].trigger_pending = cmd + 1;
2416 return 0; /* delayed, assuming it's successful */
2417 }
2418
2419 /* we're alone, let's trigger */
2420 return dpcm_fe_dai_do_trigger(substream, cmd);
2421}
2422
23607025 2423int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2424{
2425 struct snd_soc_dpcm *dpcm;
2426 int ret = 0;
2427
8d6258a4 2428 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2429
2430 struct snd_soc_pcm_runtime *be = dpcm->be;
2431 struct snd_pcm_substream *be_substream =
2432 snd_soc_dpcm_get_substream(be, stream);
2433
2434 /* is this op for this BE ? */
2435 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2436 continue;
2437
e123036b
RS		 2438 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2439 continue;
2440
01d7584c 2441 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
95f444dc 2442 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
5087a8f1
LY		 2443 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2444 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
01d7584c
LG		 2445 continue;
2446
103d84a3 2447 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
94d215cc 2448 be->dai_link->name);
01d7584c 2449
b7898396 2450 ret = __soc_pcm_prepare(be, be_substream);
dab7eeb4 2451 if (ret < 0)
01d7584c 2452 break;
01d7584c
LG		 2453
2454 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2455 }
273db971 2456
04110728 2457 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2458}
2459
45c0a188 2460static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c 2461{
0ceef681 2462 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 2463 int stream = substream->stream, ret = 0;
2464
b7898396 2465 snd_soc_dpcm_mutex_lock(fe);
01d7584c 2466
103d84a3 2467 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
01d7584c 2468
ea9d0d77 2469 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2470
2471 /* there is no point preparing this FE if there are no BEs */
2472 if (list_empty(&fe->dpcm[stream].be_clients)) {
1f566435
HG		 2473 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2474 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2475 fe->dai_link->name);
2476 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2477 fe->dai_link->name);
01d7584c
LG		 2478 ret = -EINVAL;
2479 goto out;
2480 }
2481
25c2f515 2482 ret = dpcm_be_dai_prepare(fe, stream);
01d7584c
LG		 2483 if (ret < 0)
2484 goto out;
2485
2486 /* call prepare on the frontend */
b7898396 2487 ret = __soc_pcm_prepare(fe, substream);
dab7eeb4 2488 if (ret < 0)
01d7584c 2489 goto out;
01d7584c 2490
01d7584c
LG		 2491 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2492
2493out:
ea9d0d77 2494 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
b7898396 2495 snd_soc_dpcm_mutex_unlock(fe);
01d7584c 2496
04110728 2497 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2498}
2499
618dae11
LG		 2500static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2501{
07bf84aa
LG		 2502 struct snd_pcm_substream *substream =
2503 snd_soc_dpcm_get_substream(fe, stream);
2504 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 2505 int err;
2506
103d84a3 2507 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
618dae11
LG		 2508 stream ? "capture" : "playback", fe->dai_link->name);
2509
07bf84aa
LG		 2510 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2511 /* call bespoke trigger - FE takes care of all BE triggers */
103d84a3 2512 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
07bf84aa
LG		 2513 fe->dai_link->name);
2514
30819358 2515 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
07bf84aa 2516 } else {
103d84a3 2517 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
07bf84aa
LG		 2518 fe->dai_link->name);
2519
2520 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
07bf84aa 2521 }
618dae11 2522
f52366e6 2523 dpcm_be_dai_hw_free(fe, stream);
618dae11 2524
531590bb 2525 dpcm_be_dai_shutdown(fe, stream);
618dae11
LG		 2526
2527 /* run the stream event for each BE */
2528 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2529
04110728 2530 return soc_pcm_ret(fe, err);
618dae11
LG		 2531}
2532
2533static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2534{
07bf84aa
LG		 2535 struct snd_pcm_substream *substream =
2536 snd_soc_dpcm_get_substream(fe, stream);
618dae11 2537 struct snd_soc_dpcm *dpcm;
07bf84aa 2538 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
4eeed5f4 2539 int ret = 0;
618dae11 2540
103d84a3 2541 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
618dae11
LG		 2542 stream ? "capture" : "playback", fe->dai_link->name);
2543
2544 /* Only start the BE if the FE is ready */
2545 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2c138284 2546 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2547 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2548 fe->dai_link->name, fe->dpcm[stream].state);
e91b65b3 2549 ret = -EINVAL;
2c138284 2550 goto disconnect;
2551 }
618dae11
LG		 2552
2553 /* startup must always be called for new BEs */
2554 ret = dpcm_be_dai_startup(fe, stream);
fffc0ca2 2555 if (ret < 0)
618dae11 2556 goto disconnect;
618dae11
LG		 2557
2558 /* keep going if FE state is > open */
2559 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2560 return 0;
01d7584c 2561
618dae11 2562 ret = dpcm_be_dai_hw_params(fe, stream);
fffc0ca2 2563 if (ret < 0)
618dae11 2564 goto close;
618dae11
LG		 2565
2566 /* keep going if FE state is > hw_params */
2567 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2568 return 0;
2569
618dae11 2570 ret = dpcm_be_dai_prepare(fe, stream);
fffc0ca2 2571 if (ret < 0)
618dae11 2572 goto hw_free;
618dae11
LG		 2573
2574 /* run the stream event for each BE */
2575 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2576
2577 /* keep going if FE state is > prepare */
2578 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2579 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2580 return 0;
2581
07bf84aa
LG		 2582 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2583 /* call trigger on the frontend - FE takes care of all BE triggers */
103d84a3 2584 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
07bf84aa 2585 fe->dai_link->name);
618dae11 2586
30819358 2587 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
62462e01 2588 if (ret < 0)
07bf84aa 2589 goto hw_free;
07bf84aa 2590 } else {
103d84a3 2591 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
07bf84aa
LG		 2592 fe->dai_link->name);
2593
2594 ret = dpcm_be_dai_trigger(fe, stream,
2595 SNDRV_PCM_TRIGGER_START);
db3aa39c 2596 if (ret < 0)
07bf84aa 2597 goto hw_free;
618dae11
LG		 2598 }
2599
2600 return 0;
2601
2602hw_free:
2603 dpcm_be_dai_hw_free(fe, stream);
2604close:
2605 dpcm_be_dai_shutdown(fe, stream);
2606disconnect:
2c138284 2607 /* disconnect any pending BEs */
8d6258a4 2608 for_each_dpcm_be(fe, stream, dpcm) {
618dae11 2609 struct snd_soc_pcm_runtime *be = dpcm->be;
2c138284 2610
2611 /* is this op for this BE ? */
2612 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2613 continue;
2614
2615 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2616 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2617 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
618dae11
LG		 2618 }
2619
04110728 2620 return soc_pcm_ret(fe, ret);
618dae11
LG		 2621}
2622
de15d7ff 2623static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
618dae11 2624{
de15d7ff 2625 struct snd_soc_dapm_widget_list *list;
7083f877 2626 int stream;
de15d7ff 2627 int count, paths;
618dae11 2628
96bf62f0
PLB		 2629 if (!fe->dai_link->dynamic)
2630 return 0;
2631
3989ade2 2632 if (fe->dai_link->num_cpus > 1) {
6e1276a5
BL		 2633 dev_err(fe->dev,
2634 "%s doesn't support Multi CPU yet\n", __func__);
2635 return -EINVAL;
2636 }
2637
de15d7ff 2638 /* only check active links */
b3dea624 2639 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
de15d7ff 2640 return 0;
618dae11 2641
de15d7ff
JB		 2642 /* DAPM sync will call this to update DSP paths */
2643 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2644 new ? "new" : "old", fe->dai_link->name);
618dae11 2645
7083f877 2646 for_each_pcm_streams(stream) {
618dae11 2647
7083f877 2648 /* skip if FE doesn't have playback/capture capability */
c2233a26
KM		 2649 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2650 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
7083f877 2651 continue;
de15d7ff 2652
7083f877 2653 /* skip if FE isn't currently playing/capturing */
b3dea624
KM		 2654 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2655 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
7083f877 2656 continue;
075207d2 2657
7083f877 2658 paths = dpcm_path_get(fe, stream, &list);
d479f00b 2659 if (paths < 0)
7083f877 2660 return paths;
618dae11 2661
7083f877
KM		 2662 /* update any playback/capture paths */
2663 count = dpcm_process_paths(fe, stream, &list, new);
2664 if (count) {
580dff36 2665 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
7083f877 2666 if (new)
81c82a9e 2667 dpcm_run_update_startup(fe, stream);
7083f877 2668 else
81c82a9e 2669 dpcm_run_update_shutdown(fe, stream);
580dff36 2670 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11 2671
7083f877
KM		 2672 dpcm_clear_pending_state(fe, stream);
2673 dpcm_be_disconnect(fe, stream);
2674 }
618dae11 2675
7083f877 2676 dpcm_path_put(&list);
618dae11
LG		 2677 }
2678
618dae11
LG		 2679 return 0;
2680}
de15d7ff
JB		 2681
2682/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2683 * any DAI links.
2684 */
f17a1478 2685int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
de15d7ff
JB		 2686{
2687 struct snd_soc_pcm_runtime *fe;
2688 int ret = 0;
2689
38e42f6d 2690 snd_soc_dpcm_mutex_lock(card);
de15d7ff 2691 /* shutdown all old paths first */
bcb1fd1f 2692 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2693 ret = soc_dpcm_fe_runtime_update(fe, 0);
2694 if (ret)
2695 goto out;
2696 }
2697
2698 /* bring new paths up */
bcb1fd1f 2699 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2700 ret = soc_dpcm_fe_runtime_update(fe, 1);
2701 if (ret)
2702 goto out;
2703 }
2704
2705out:
38e42f6d 2706 snd_soc_dpcm_mutex_unlock(card);
de15d7ff
JB		 2707 return ret;
2708}
f17a1478 2709EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
01d7584c 2710
265694b6 2711static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
01d7584c 2712{
0ceef681 2713 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c 2714 struct snd_soc_dpcm *dpcm;
265694b6 2715 int stream = fe_substream->stream;
30fca26f 2716
b7898396
TI		 2717 snd_soc_dpcm_mutex_assert_held(fe);
2718
30fca26f
KM		 2719 /* mark FE's links ready to prune */
2720 for_each_dpcm_be(fe, stream, dpcm)
2721 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2722
2723 dpcm_be_disconnect(fe, stream);
265694b6
KM		 2724}
2725
2726static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2727{
0ceef681 2728 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
265694b6
KM		 2729 int ret;
2730
b7898396 2731 snd_soc_dpcm_mutex_lock(fe);
265694b6
KM		 2732 ret = dpcm_fe_dai_shutdown(fe_substream);
2733
2734 dpcm_fe_dai_cleanup(fe_substream);
2735
b7898396 2736 snd_soc_dpcm_mutex_unlock(fe);
30fca26f
KM		 2737 return ret;
2738}
2739
45c0a188 2740static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c 2741{
0ceef681 2742 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c
LG		 2743 struct snd_soc_dapm_widget_list *list;
2744 int ret;
2745 int stream = fe_substream->stream;
2746
b7898396 2747 snd_soc_dpcm_mutex_lock(fe);
01d7584c 2748
8f70e515 2749 ret = dpcm_path_get(fe, stream, &list);
d479f00b 2750 if (ret < 0)
cae06eb9 2751 goto open_end;
01d7584c
LG		 2752
2753 /* calculate valid and active FE <-> BE dpcms */
2754 dpcm_process_paths(fe, stream, &list, 1);
2755
2756 ret = dpcm_fe_dai_startup(fe_substream);
265694b6
KM		 2757 if (ret < 0)
2758 dpcm_fe_dai_cleanup(fe_substream);
01d7584c
LG		 2759
2760 dpcm_clear_pending_state(fe, stream);
2761 dpcm_path_put(&list);
cae06eb9 2762open_end:
b7898396 2763 snd_soc_dpcm_mutex_unlock(fe);
01d7584c
LG		 2764 return ret;
2765}
2766
7fc6bebd
KM		 2767static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2768 int *playback, int *capture)
ddee627c 2769{
cfcb31c4 2770 struct snd_soc_dai_link *dai_link = rtd->dai_link;
19bdcc7a 2771 struct snd_soc_dai *cpu_dai;
c3e9b6d6
KM		 2772 int has_playback = 0;
2773 int has_capture = 0;
2e5894d7 2774 int i;
ddee627c 2775
cfcb31c4 2776 if (dai_link->dynamic && dai_link->num_cpus > 1) {
a1c0221f 2777 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
b73287f0
PLB		 2778 return -EINVAL;
2779 }
2780
cfcb31c4 2781 if (dai_link->dynamic || dai_link->no_pcm) {
940a1f43
KM		 2782 int stream;
2783
cfcb31c4 2784 if (dai_link->dpcm_playback) {
b73287f0
PLB		 2785 stream = SNDRV_PCM_STREAM_PLAYBACK;
2786
4f872154
PLB		 2787 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2788 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
c3e9b6d6 2789 has_playback = 1;
4f872154 2790 break;
b73287f0 2791 }
4f872154 2792 }
c3e9b6d6 2793 if (!has_playback) {
4f872154
PLB		 2794 dev_err(rtd->card->dev,
2795 "No CPU DAIs support playback for stream %s\n",
cfcb31c4 2796 dai_link->stream_name);
4f872154
PLB		 2797 return -EINVAL;
2798 }
b73287f0 2799 }
cfcb31c4 2800 if (dai_link->dpcm_capture) {
b73287f0
PLB		 2801 stream = SNDRV_PCM_STREAM_CAPTURE;
2802
4f872154
PLB		 2803 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2804 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
c3e9b6d6 2805 has_capture = 1;
4f872154 2806 break;
b73287f0 2807 }
4f872154
PLB		 2808 }
2809
c3e9b6d6 2810 if (!has_capture) {
4f872154
PLB		 2811 dev_err(rtd->card->dev,
2812 "No CPU DAIs support capture for stream %s\n",
cfcb31c4 2813 dai_link->stream_name);
4f872154
PLB		 2814 return -EINVAL;
2815 }
9b5db059 2816 }
01d7584c 2817 } else {
940a1f43
KM		 2818 struct snd_soc_dai *codec_dai;
2819
a342031c 2820 /* Adapt stream for codec2codec links */
1c943f60
KM		 2821 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2822 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
a342031c 2823
a4be4187 2824 for_each_rtd_codec_dais(rtd, i, codec_dai) {
cfcb31c4 2825 if (dai_link->num_cpus == 1) {
c2233a26 2826 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
cfcb31c4 2827 } else if (dai_link->num_cpus == dai_link->num_codecs) {
c2233a26 2828 cpu_dai = asoc_rtd_to_cpu(rtd, i);
ac950278
BL		 2829 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
2830 int cpu_id;
2831
2832 if (!rtd->dai_link->codec_ch_maps) {
2833 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
2834 __func__);
2835 return -EINVAL;
2836 }
2837
2838 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
2839 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id);
19bdcc7a
SN		 2840 } else {
2841 dev_err(rtd->card->dev,
ac950278
BL		 2842 "%s codec number %d < cpu number %d is not supported\n",
2843 __func__, rtd->dai_link->num_codecs,
2844 rtd->dai_link->num_cpus);
19bdcc7a
SN		 2845 return -EINVAL;
2846 }
2847
467fece8 2848 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
a4877a6f 2849 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
c3e9b6d6 2850 has_playback = 1;
467fece8 2851 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
a4877a6f 2852 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
c3e9b6d6 2853 has_capture = 1;
2e5894d7 2854 }
01d7584c
LG		 2855 }
2856
e1f653ce 2857 if (dai_link->playback_only)
c3e9b6d6 2858 has_capture = 0;
d6bead02 2859
e1f653ce 2860 if (dai_link->capture_only)
c3e9b6d6 2861 has_playback = 0;
d6bead02 2862
c3e9b6d6 2863 if (!has_playback && !has_capture) {
092830cf 2864 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
cfcb31c4 2865 dai_link->stream_name);
092830cf
KM		 2866
2867 return -EINVAL;
2868 }
2869
c3e9b6d6
KM		 2870 *playback = has_playback;
2871 *capture = has_capture;
2872
7fc6bebd
KM		 2873 return 0;
2874}
2875
2b39123b
KM		 2876static int soc_create_pcm(struct snd_pcm **pcm,
2877 struct snd_soc_pcm_runtime *rtd,
2878 int playback, int capture, int num)
7fc6bebd 2879{
7fc6bebd 2880 char new_name[64];
2b39123b 2881 int ret;
7fc6bebd 2882
01d7584c 2883 /* create the PCM */
7ddc7f91 2884 if (rtd->dai_link->c2c_params) {
a342031c
JB		 2885 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2886 rtd->dai_link->stream_name);
2887
2888 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2b39123b 2889 playback, capture, pcm);
a342031c 2890 } else if (rtd->dai_link->no_pcm) {
01d7584c
LG		 2891 snprintf(new_name, sizeof(new_name), "(%s)",
2892 rtd->dai_link->stream_name);
2893
2894 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2b39123b 2895 playback, capture, pcm);
01d7584c
LG		 2896 } else {
2897 if (rtd->dai_link->dynamic)
2898 snprintf(new_name, sizeof(new_name), "%s (*)",
2899 rtd->dai_link->stream_name);
2900 else
2901 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2e5894d7 2902 rtd->dai_link->stream_name,
6fb8944c 2903 soc_codec_dai_name(rtd), num);
01d7584c
LG		 2904
2905 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2b39123b 2906 capture, pcm);
01d7584c 2907 }
ddee627c 2908 if (ret < 0) {
799827a4
PLB		 2909 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2910 new_name, rtd->dai_link->name, ret);
ddee627c
LG		 2911 return ret;
2912 }
103d84a3 2913 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
ddee627c 2914
2b39123b
KM		 2915 return 0;
2916}
2917
2918/* create a new pcm */
2919int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2920{
2921 struct snd_soc_component *component;
2922 struct snd_pcm *pcm;
2923 int ret = 0, playback = 0, capture = 0;
2924 int i;
2925
2926 ret = soc_get_playback_capture(rtd, &playback, &capture);
2927 if (ret < 0)
2928 return ret;
2929
2930 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2931 if (ret < 0)
2932 return ret;
2933
ddee627c 2934 /* DAPM dai link stream work */
10d5d8cb
KM		 2935 /*
2936 * Currently nothing to do for c2c links
2937 * Since c2c links are internal nodes in the DAPM graph and
2938 * don't interface with the outside world or application layer
2939 * we don't have to do any special handling on close.
2940 */
7ddc7f91 2941 if (!rtd->dai_link->c2c_params)
83f94a2e 2942 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
ddee627c
LG		 2943
2944 rtd->pcm = pcm;
e04e7b8c 2945 pcm->nonatomic = rtd->dai_link->nonatomic;
ddee627c 2946 pcm->private_data = rtd;
4d45d944 2947 pcm->no_device_suspend = true;
01d7584c 2948
7ddc7f91 2949 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
01d7584c
LG		 2950 if (playback)
2951 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2952 if (capture)
2953 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2954 goto out;
2955 }
2956
2957 /* ASoC PCM operations */
2958 if (rtd->dai_link->dynamic) {
2959 rtd->ops.open = dpcm_fe_dai_open;
2960 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2961 rtd->ops.prepare = dpcm_fe_dai_prepare;
2962 rtd->ops.trigger = dpcm_fe_dai_trigger;
2963 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2964 rtd->ops.close = dpcm_fe_dai_close;
2965 rtd->ops.pointer = soc_pcm_pointer;
2966 } else {
2967 rtd->ops.open = soc_pcm_open;
2968 rtd->ops.hw_params = soc_pcm_hw_params;
2969 rtd->ops.prepare = soc_pcm_prepare;
2970 rtd->ops.trigger = soc_pcm_trigger;
2971 rtd->ops.hw_free = soc_pcm_hw_free;
2972 rtd->ops.close = soc_pcm_close;
2973 rtd->ops.pointer = soc_pcm_pointer;
2974 }
2975
613fb500 2976 for_each_rtd_components(rtd, i, component) {
2b544dd7 2977 const struct snd_soc_component_driver *drv = component->driver;
b8135864 2978
3b1c952c
TI		 2979 if (drv->ioctl)
2980 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
1e5ddb6b
TI		 2981 if (drv->sync_stop)
2982 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
66201cac
TI		 2983 if (drv->copy)
2984 rtd->ops.copy = snd_soc_pcm_component_copy;
e9067bb5 2985 if (drv->page)
9c712e4f 2986 rtd->ops.page = snd_soc_pcm_component_page;
e9067bb5 2987 if (drv->mmap)
205875e1 2988 rtd->ops.mmap = snd_soc_pcm_component_mmap;
8bdfc045
SW		 2989 if (drv->ack)
2990 rtd->ops.ack = snd_soc_pcm_component_ack;
ddee627c
LG		 2991 }
2992
2993 if (playback)
01d7584c 2994 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 2995
2996 if (capture)
01d7584c 2997 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c 2998
b2b2afbb 2999 ret = snd_soc_pcm_component_new(rtd);
60adbd8f 3000 if (ret < 0)
7484291e 3001 return ret;
01d7584c 3002out:
1d5cd525 3003 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
6fb8944c 3004 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
ddee627c
LG		 3005 return ret;
3006}
01d7584c
LG		 3007
3008/* is the current PCM operation for this FE ? */
3009int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3010{
3011 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3012 return 1;
3013 return 0;
3014}
3015EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3016
3017/* is the current PCM operation for this BE ? */
3018int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3019 struct snd_soc_pcm_runtime *be, int stream)
3020{
3021 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3022 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3023 be->dpcm[stream].runtime_update))
3024 return 1;
3025 return 0;
3026}
3027EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3028
3029/* get the substream for this BE */
3030struct snd_pcm_substream *
3031 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3032{
3033 return be->pcm->streams[stream].substream;
3034}
3035EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3036
085d22be
KM		 3037static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3038 struct snd_soc_pcm_runtime *be,
3039 int stream,
3040 const enum snd_soc_dpcm_state *states,
3041 int num_states)
01d7584c
LG		 3042{
3043 struct snd_soc_dpcm *dpcm;
3044 int state;
a9764869 3045 int ret = 1;
085d22be 3046 int i;
01d7584c 3047
d2e24d64 3048 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3049
3050 if (dpcm->fe == fe)
3051 continue;
3052
3053 state = dpcm->fe->dpcm[stream].state;
085d22be
KM		 3054 for (i = 0; i < num_states; i++) {
3055 if (state == states[i]) {
3056 ret = 0;
3057 break;
3058 }
a9764869 3059 }
01d7584c
LG		 3060 }
3061
085d22be 3062 /* it's safe to do this BE DAI */
a9764869 3063 return ret;
01d7584c 3064}
085d22be
KM		 3065
3066/*
3067 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3068 * are not running, paused or suspended for the specified stream direction.
3069 */
3070int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3071 struct snd_soc_pcm_runtime *be, int stream)
3072{
3073 const enum snd_soc_dpcm_state state[] = {
3074 SND_SOC_DPCM_STATE_START,
3075 SND_SOC_DPCM_STATE_PAUSED,
3076 SND_SOC_DPCM_STATE_SUSPEND,
3077 };
3078
3079 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3080}
01d7584c
LG		 3081EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3082
3083/*
3084 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3085 * running, paused or suspended for the specified stream direction.
3086 */
3087int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3088 struct snd_soc_pcm_runtime *be, int stream)
3089{
085d22be
KM		 3090 const enum snd_soc_dpcm_state state[] = {
3091 SND_SOC_DPCM_STATE_START,
3092 SND_SOC_DPCM_STATE_PAUSED,
3093 SND_SOC_DPCM_STATE_SUSPEND,
3094 SND_SOC_DPCM_STATE_PREPARE,
3095 };
01d7584c 3096
085d22be 3097 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
01d7584c
LG		 3098}
3099EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
e123036b
RS		 3100
3101/*
3102 * We can only prepare a BE DAI if any of it's FE are not prepared,
3103 * running or paused for the specified stream direction.
3104 */
3105int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3106 struct snd_soc_pcm_runtime *be, int stream)
3107{
3108 const enum snd_soc_dpcm_state state[] = {
3109 SND_SOC_DPCM_STATE_START,
3110 SND_SOC_DPCM_STATE_PAUSED,
3111 SND_SOC_DPCM_STATE_PREPARE,
3112 };
3113
3114 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3115}
3116EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);
Linux 6.x block layer and io_uring tree(s)