projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ASoC: lower "no backend DAIs enabled for ... Port" log severity
[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
706 if (snd_soc_dai_stream_active(dai, substream->stream) == 0)
707 snd_soc_dai_digital_mute(dai, 1, substream->stream);
708 }
709 }
62c86d1d 710
c840f769 711 for_each_rtd_dais(rtd, i, dai)
140a4532 712 snd_soc_dai_shutdown(dai, substream, rollback);
62c86d1d 713
140a4532 714 snd_soc_link_shutdown(substream, rollback);
62c86d1d 715
140a4532 716 soc_pcm_components_close(substream, rollback);
62c86d1d 717
140a4532 718 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
62c86d1d
KM		 719
720 for_each_rtd_components(rtd, i, component)
b3dea624 721 if (!snd_soc_component_active(component))
62c86d1d
KM		 722 pinctrl_pm_select_sleep_state(component->dev);
723
724 return 0;
725}
726
140a4532
KM		 727/*
728 * Called by ALSA when a PCM substream is closed. Private data can be
729 * freed here. The cpu DAI, codec DAI, machine and components are also
730 * shutdown.
731 */
b7898396
TI		 732static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
733 struct snd_pcm_substream *substream)
734{
735 return soc_pcm_clean(rtd, substream, 0);
736}
737
738/* PCM close ops for non-DPCM streams */
140a4532
KM		 739static int soc_pcm_close(struct snd_pcm_substream *substream)
740{
b7898396
TI		 741 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
742
743 snd_soc_dpcm_mutex_lock(rtd);
6bbabd28 744 __soc_pcm_close(rtd, substream);
b7898396
TI		 745 snd_soc_dpcm_mutex_unlock(rtd);
746 return 0;
140a4532
KM		 747}
748
c393281a
KM		 749static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
750{
751 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
752 struct snd_pcm_hardware *hw = &substream->runtime->hw;
753 const char *name_cpu = soc_cpu_dai_name(rtd);
754 const char *name_codec = soc_codec_dai_name(rtd);
755 const char *err_msg;
756 struct device *dev = rtd->dev;
757
758 err_msg = "rates";
759 if (!hw->rates)
760 goto config_err;
761
762 err_msg = "formats";
763 if (!hw->formats)
764 goto config_err;
765
766 err_msg = "channels";
767 if (!hw->channels_min || !hw->channels_max ||
768 hw->channels_min > hw->channels_max)
769 goto config_err;
770
771 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
772 name_cpu);
773 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
774 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
775 hw->channels_max);
776 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
777 hw->rate_max);
778
779 return 0;
780
781config_err:
782 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
783 name_codec, name_cpu, err_msg);
784 return -EINVAL;
785}
786
ddee627c
LG		 787/*
788 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
789 * then initialized and any private data can be allocated. This also calls
ef050bec 790 * startup for the cpu DAI, component, machine and codec DAI.
ddee627c 791 */
b7898396
TI		 792static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
793 struct snd_pcm_substream *substream)
ddee627c 794{
90be711e 795 struct snd_soc_component *component;
c840f769 796 struct snd_soc_dai *dai;
244e2936 797 int i, ret = 0;
ddee627c 798
b7898396
TI		 799 snd_soc_dpcm_mutex_assert_held(rtd);
800
76c39e86
KM		 801 for_each_rtd_components(rtd, i, component)
802 pinctrl_pm_select_default_state(component->dev);
90be711e 803
939a5cfb
KM		 804 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
805 if (ret < 0)
b7898396 806 goto err;
ddee627c 807
5d9fa03e
KM		 808 ret = soc_pcm_components_open(substream);
809 if (ret < 0)
140a4532 810 goto err;
5d9fa03e 811
7cf3c5b4 812 ret = snd_soc_link_startup(substream);
a5e6c109 813 if (ret < 0)
140a4532 814 goto err;
5d9fa03e 815
ddee627c 816 /* startup the audio subsystem */
c840f769
KM		 817 for_each_rtd_dais(rtd, i, dai) {
818 ret = snd_soc_dai_startup(dai, substream);
ce820145 819 if (ret < 0)
140a4532 820 goto err;
ddee627c
LG		 821 }
822
01d7584c
LG		 823 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
824 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
825 goto dynamic;
826
ddee627c 827 /* Check that the codec and cpu DAIs are compatible */
2e5894d7
BC		 828 soc_pcm_init_runtime_hw(substream);
829
68cbc557 830 soc_pcm_update_symmetry(substream);
62e5f676 831
c393281a
KM		 832 ret = soc_hw_sanity_check(substream);
833 if (ret < 0)
140a4532 834 goto err;
ddee627c 835
c8dd1fec 836 soc_pcm_apply_msb(substream);
58ba9b25 837
ddee627c 838 /* Symmetry only applies if we've already got an active stream. */
c840f769 839 for_each_rtd_dais(rtd, i, dai) {
f8fc9ec5
KM		 840 ret = soc_pcm_apply_symmetry(substream, dai);
841 if (ret != 0)
842 goto err;
ddee627c 843 }
01d7584c 844dynamic:
24894b76 845 snd_soc_runtime_activate(rtd, substream->stream);
8e7875ae 846 ret = 0;
140a4532 847err:
04110728 848 if (ret < 0)
b7898396 849 soc_pcm_clean(rtd, substream, 1);
d6652ef8 850
04110728 851 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 852}
853
b7898396
TI		 854/* PCM open ops for non-DPCM streams */
855static int soc_pcm_open(struct snd_pcm_substream *substream)
856{
857 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
858 int ret;
859
860 snd_soc_dpcm_mutex_lock(rtd);
861 ret = __soc_pcm_open(rtd, substream);
862 snd_soc_dpcm_mutex_unlock(rtd);
863 return ret;
864}
865
ddee627c
LG		 866/*
867 * Called by ALSA when the PCM substream is prepared, can set format, sample
868 * rate, etc. This function is non atomic and can be called multiple times,
869 * it can refer to the runtime info.
870 */
b7898396
TI		 871static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
872 struct snd_pcm_substream *substream)
ddee627c 873{
c840f769 874 struct snd_soc_dai *dai;
2e5894d7 875 int i, ret = 0;
ddee627c 876
b7898396 877 snd_soc_dpcm_mutex_assert_held(rtd);
ddee627c 878
7cf3c5b4 879 ret = snd_soc_link_prepare(substream);
a5e6c109 880 if (ret < 0)
44c1a75b 881 goto out;
ddee627c 882
4f39514f
KM		 883 ret = snd_soc_pcm_component_prepare(substream);
884 if (ret < 0)
885 goto out;
b8135864 886
d108c7fd 887 ret = snd_soc_pcm_dai_prepare(substream);
62462e01 888 if (ret < 0)
d108c7fd 889 goto out;
4beb8e10 890
ddee627c
LG		 891 /* cancel any delayed stream shutdown that is pending */
892 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
9bffb1fb
MLC		 893 rtd->pop_wait) {
894 rtd->pop_wait = 0;
ddee627c
LG		 895 cancel_delayed_work(&rtd->delayed_work);
896 }
897
d9b0951b
LG		 898 snd_soc_dapm_stream_event(rtd, substream->stream,
899 SND_SOC_DAPM_STREAM_START);
ddee627c 900
c840f769
KM		 901 for_each_rtd_dais(rtd, i, dai)
902 snd_soc_dai_digital_mute(dai, 0, substream->stream);
ddee627c
LG		 903
904out:
04110728 905 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 906}
907
b7898396
TI		 908/* PCM prepare ops for non-DPCM streams */
909static int soc_pcm_prepare(struct snd_pcm_substream *substream)
910{
911 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
912 int ret;
913
914 snd_soc_dpcm_mutex_lock(rtd);
915 ret = __soc_pcm_prepare(rtd, substream);
916 snd_soc_dpcm_mutex_unlock(rtd);
917 return ret;
918}
919
2e5894d7
BC		 920static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
921 unsigned int mask)
922{
923 struct snd_interval *interval;
924 int channels = hweight_long(mask);
925
926 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
927 interval->min = channels;
928 interval->max = channels;
929}
930
b7898396
TI		 931static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
932 struct snd_pcm_substream *substream, int rollback)
ab49436e 933{
ab49436e
KM		 934 struct snd_soc_dai *dai;
935 int i;
936
b7898396 937 snd_soc_dpcm_mutex_assert_held(rtd);
ab49436e 938
a27b421f
RS		 939 /* run the stream event */
940 snd_soc_dapm_stream_stop(rtd, substream->stream);
941
ab49436e 942 /* free any machine hw params */
4662c596 943 snd_soc_link_hw_free(substream, rollback);
ab49436e
KM		 944
945 /* free any component resources */
4662c596 946 snd_soc_pcm_component_hw_free(substream, rollback);
ab49436e
KM		 947
948 /* now free hw params for the DAIs */
121966d0
KM		 949 for_each_rtd_dais(rtd, i, dai)
950 if (snd_soc_dai_stream_valid(dai, substream->stream))
951 snd_soc_dai_hw_free(dai, substream, rollback);
ab49436e 952
ab49436e
KM		 953 return 0;
954}
955
4662c596
KM		 956/*
957 * Frees resources allocated by hw_params, can be called multiple times
958 */
b7898396
TI		 959static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
960 struct snd_pcm_substream *substream)
961{
962 return soc_pcm_hw_clean(rtd, substream, 0);
963}
964
965/* hw_free PCM ops for non-DPCM streams */
4662c596
KM		 966static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
967{
b7898396
TI		 968 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
969 int ret;
970
971 snd_soc_dpcm_mutex_lock(rtd);
972 ret = __soc_pcm_hw_free(rtd, substream);
973 snd_soc_dpcm_mutex_unlock(rtd);
974 return ret;
4662c596
KM		 975}
976
ddee627c
LG		 977/*
978 * Called by ALSA when the hardware params are set by application. This
979 * function can also be called multiple times and can allocate buffers
980 * (using snd_pcm_lib_* ). It's non-atomic.
981 */
b7898396
TI		 982static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
983 struct snd_pcm_substream *substream,
984 struct snd_pcm_hw_params *params)
ddee627c 985{
19bdcc7a 986 struct snd_soc_dai *cpu_dai;
0b7990e3 987 struct snd_soc_dai *codec_dai;
244e2936 988 int i, ret = 0;
ddee627c 989
b7898396 990 snd_soc_dpcm_mutex_assert_held(rtd);
5cca5951
SW		 991
992 ret = soc_pcm_params_symmetry(substream, params);
993 if (ret)
994 goto out;
995
7cf3c5b4 996 ret = snd_soc_link_hw_params(substream, params);
a5e6c109 997 if (ret < 0)
de9ad990 998 goto out;
ddee627c 999
a4be4187 1000 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2e5894d7 1001 struct snd_pcm_hw_params codec_params;
e15ff262 1002 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
2e5894d7 1003
cde79035
RW		 1004 /*
1005 * Skip CODECs which don't support the current stream type,
1006 * the idea being that if a CODEC is not used for the currently
1007 * set up transfer direction, it should not need to be
1008 * configured, especially since the configuration used might
1009 * not even be supported by that CODEC. There may be cases
1010 * however where a CODEC needs to be set up although it is
1011 * actually not being used for the transfer, e.g. if a
1012 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1013 * for the DAI link including a playback-only CODEC.
1014 * If this becomes necessary, we will have to augment the
1015 * machine driver setup with information on how to act, so
1016 * we can do the right thing here.
1017 */
1018 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1019 continue;
1020
2e5894d7
BC		 1021 /* copy params for each codec */
1022 codec_params = *params;
1023
1024 /* fixup params based on TDM slot masks */
e15ff262
KM		 1025 if (tdm_mask)
1026 soc_pcm_codec_params_fixup(&codec_params, tdm_mask);
2e5894d7 1027
aa6166c2
KM		 1028 ret = snd_soc_dai_hw_params(codec_dai, substream,
1029 &codec_params);
93e6958a 1030 if(ret < 0)
4662c596 1031 goto out;
ddee627c 1032
2805b8bd 1033 soc_pcm_set_dai_params(codec_dai, &codec_params);
078a85f2 1034 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
ddee627c
LG		 1035 }
1036
a4be4187 1037 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
ac950278
BL		 1038 struct snd_pcm_hw_params cpu_params;
1039 unsigned int ch_mask = 0;
1040 int j;
1041
0e9cf4c4
BL		 1042 /*
1043 * Skip CPUs which don't support the current stream
1044 * type. See soc_pcm_init_runtime_hw() for more details
1045 */
1046 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1047 continue;
1048
ac950278
BL		 1049 /* copy params for each cpu */
1050 cpu_params = *params;
1051
1052 if (!rtd->dai_link->codec_ch_maps)
1053 goto hw_params;
1054 /*
1055 * construct cpu channel mask by combining ch_mask of each
1056 * codec which maps to the cpu.
1057 */
1058 for_each_rtd_codec_dais(rtd, j, codec_dai) {
1059 if (rtd->dai_link->codec_ch_maps[j].connected_cpu_id == i)
1060 ch_mask |= rtd->dai_link->codec_ch_maps[j].ch_mask;
1061 }
1062
1063 /* fixup cpu channel number */
1064 if (ch_mask)
1065 soc_pcm_codec_params_fixup(&cpu_params, ch_mask);
1066
1067hw_params:
1068 ret = snd_soc_dai_hw_params(cpu_dai, substream, &cpu_params);
19bdcc7a 1069 if (ret < 0)
4662c596 1070 goto out;
ddee627c 1071
19bdcc7a 1072 /* store the parameters for each DAI */
ac950278
BL		 1073 soc_pcm_set_dai_params(cpu_dai, &cpu_params);
1074 snd_soc_dapm_update_dai(substream, &cpu_params, cpu_dai);
19bdcc7a 1075 }
ca58221d 1076
3a36a64a 1077 ret = snd_soc_pcm_component_hw_params(substream, params);
ddee627c 1078out:
04110728 1079 if (ret < 0)
b7898396 1080 soc_pcm_hw_clean(rtd, substream, 1);
ddee627c 1081
04110728 1082 return soc_pcm_ret(rtd, ret);
ddee627c
LG		 1083}
1084
b7898396
TI		 1085/* hw_params PCM ops for non-DPCM streams */
1086static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1087 struct snd_pcm_hw_params *params)
1088{
1089 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1090 int ret;
1091
1092 snd_soc_dpcm_mutex_lock(rtd);
1093 ret = __soc_pcm_hw_params(rtd, substream, params);
1094 snd_soc_dpcm_mutex_unlock(rtd);
1095 return ret;
1096}
1097
356caf66
KM		 1098#define TRIGGER_MAX 3
1099static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1100 [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1101 snd_soc_link_trigger,
1102 snd_soc_pcm_component_trigger,
1103 snd_soc_pcm_dai_trigger,
1104 },
1105 [SND_SOC_TRIGGER_ORDER_LDC] = {
1106 snd_soc_link_trigger,
1107 snd_soc_pcm_dai_trigger,
1108 snd_soc_pcm_component_trigger,
1109 },
1110};
1111
4378f1fb
PU		 1112static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1113{
59dd33f8 1114 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
54fc4b72 1115 struct snd_soc_component *component;
356caf66 1116 int ret = 0, r = 0, i;
6374f493 1117 int rollback = 0;
356caf66
KM		 1118 int start = 0, stop = 0;
1119
1120 /*
1121 * select START/STOP sequence
1122 */
1123 for_each_rtd_components(rtd, i, component) {
1124 if (component->driver->trigger_start)
1125 start = component->driver->trigger_start;
1126 if (component->driver->trigger_stop)
1127 stop = component->driver->trigger_stop;
1128 }
1129 if (rtd->dai_link->trigger_start)
1130 start = rtd->dai_link->trigger_start;
1131 if (rtd->dai_link->trigger_stop)
1132 stop = rtd->dai_link->trigger_stop;
1133
1134 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1135 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX)
1136 return -EINVAL;
4378f1fb 1137
356caf66
KM		 1138 /*
1139 * START
1140 */
4378f1fb
PU		 1141 switch (cmd) {
1142 case SNDRV_PCM_TRIGGER_START:
1143 case SNDRV_PCM_TRIGGER_RESUME:
1144 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
356caf66
KM		 1145 for (i = 0; i < TRIGGER_MAX; i++) {
1146 r = trigger[start][i](substream, cmd, 0);
1147 if (r < 0)
54fc4b72 1148 break;
54fc4b72 1149 }
6374f493
KM		 1150 }
1151
356caf66
KM		 1152 /*
1153 * Rollback if START failed
1154 * find correspond STOP command
1155 */
1156 if (r < 0) {
1157 rollback = 1;
1158 ret = r;
6374f493
KM		 1159 switch (cmd) {
1160 case SNDRV_PCM_TRIGGER_START:
1161 cmd = SNDRV_PCM_TRIGGER_STOP;
1162 break;
1163 case SNDRV_PCM_TRIGGER_RESUME:
1164 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
836367be 1165 break;
6374f493
KM		 1166 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1167 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1168 break;
1169 }
1170 }
836367be 1171
356caf66
KM		 1172 /*
1173 * STOP
1174 */
6374f493 1175 switch (cmd) {
4378f1fb
PU		 1176 case SNDRV_PCM_TRIGGER_STOP:
1177 case SNDRV_PCM_TRIGGER_SUSPEND:
1178 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
356caf66
KM		 1179 for (i = TRIGGER_MAX; i > 0; i--) {
1180 r = trigger[stop][i - 1](substream, cmd, rollback);
1181 if (r < 0)
1182 ret = r;
59dd33f8 1183 }
4378f1fb
PU		 1184 }
1185
1186 return ret;
1187}
1188
ddee627c
LG		 1189/*
1190 * soc level wrapper for pointer callback
ef050bec 1191 * If cpu_dai, codec_dai, component driver has the delay callback, then
dd894f4c 1192 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
ddee627c
LG		 1193 */
1194static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1195{
ddee627c
LG		 1196 struct snd_pcm_runtime *runtime = substream->runtime;
1197 snd_pcm_uframes_t offset = 0;
2e5894d7 1198 snd_pcm_sframes_t codec_delay = 0;
19bdcc7a 1199 snd_pcm_sframes_t cpu_delay = 0;
ddee627c 1200
0035e256 1201 offset = snd_soc_pcm_component_pointer(substream);
b8135864 1202
403f830e 1203 /* should be called *after* snd_soc_pcm_component_pointer() */
8544f08c 1204 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
403f830e 1205 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
ddee627c 1206
dd894f4c 1207 runtime->delay = cpu_delay + codec_delay;
ddee627c
LG		 1208
1209 return offset;
1210}
1211
01d7584c
LG		 1212/* connect a FE and BE */
1213static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1214 struct snd_soc_pcm_runtime *be, int stream)
1215{
bbf7d3b1
PLB		 1216 struct snd_pcm_substream *fe_substream;
1217 struct snd_pcm_substream *be_substream;
01d7584c 1218 struct snd_soc_dpcm *dpcm;
b7898396
TI		 1219
1220 snd_soc_dpcm_mutex_assert_held(fe);
01d7584c
LG		 1221
1222 /* only add new dpcms */
8d6258a4 1223 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1224 if (dpcm->be == be && dpcm->fe == fe)
1225 return 0;
1226 }
1227
bbf7d3b1
PLB		 1228 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1229 be_substream = snd_soc_dpcm_get_substream(be, stream);
1230
1231 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1232 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1233 __func__);
1234 return -EINVAL;
1235 }
1236 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
4ccf0949 1237 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
bbf7d3b1
PLB		 1238 be_substream->pcm->nonatomic = 1;
1239 }
1240
fb6d679f 1241 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
01d7584c
LG		 1242 if (!dpcm)
1243 return -ENOMEM;
1244
1245 dpcm->be = be;
1246 dpcm->fe = fe;
01d7584c 1247 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
b7898396 1248 snd_soc_dpcm_stream_lock_irq(fe, stream);
01d7584c
LG		 1249 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1250 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
b7898396 1251 snd_soc_dpcm_stream_unlock_irq(fe, stream);
01d7584c 1252
7cc302d2 1253 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
01d7584c
LG		 1254 stream ? "capture" : "playback", fe->dai_link->name,
1255 stream ? "<-" : "->", be->dai_link->name);
1256
154dae87
KM		 1257 dpcm_create_debugfs_state(dpcm, stream);
1258
01d7584c
LG		 1259 return 1;
1260}
1261
1262/* reparent a BE onto another FE */
1263static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1264 struct snd_soc_pcm_runtime *be, int stream)
1265{
1266 struct snd_soc_dpcm *dpcm;
1267 struct snd_pcm_substream *fe_substream, *be_substream;
1268
1269 /* reparent if BE is connected to other FEs */
1270 if (!be->dpcm[stream].users)
1271 return;
1272
1273 be_substream = snd_soc_dpcm_get_substream(be, stream);
db8f91d4
SRM		 1274 if (!be_substream)
1275 return;
01d7584c 1276
d2e24d64 1277 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 1278 if (dpcm->fe == fe)
1279 continue;
1280
7cc302d2 1281 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
01d7584c
LG		 1282 stream ? "capture" : "playback",
1283 dpcm->fe->dai_link->name,
1284 stream ? "<-" : "->", dpcm->be->dai_link->name);
1285
1286 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1287 be_substream->runtime = fe_substream->runtime;
1288 break;
1289 }
1290}
1291
1292/* disconnect a BE and FE */
23607025 1293void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1294{
1295 struct snd_soc_dpcm *dpcm, *d;
9f620684 1296 LIST_HEAD(deleted_dpcms);
01d7584c 1297
b7898396
TI		 1298 snd_soc_dpcm_mutex_assert_held(fe);
1299
1300 snd_soc_dpcm_stream_lock_irq(fe, stream);
8d6258a4 1301 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
103d84a3 1302 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
01d7584c
LG		 1303 stream ? "capture" : "playback",
1304 dpcm->be->dai_link->name);
1305
1306 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1307 continue;
1308
7cc302d2 1309 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
01d7584c
LG		 1310 stream ? "capture" : "playback", fe->dai_link->name,
1311 stream ? "<-" : "->", dpcm->be->dai_link->name);
1312
1313 /* BEs still alive need new FE */
1314 dpcm_be_reparent(fe, dpcm->be, stream);
1315
1316 list_del(&dpcm->list_be);
9f620684
TI		 1317 list_move(&dpcm->list_fe, &deleted_dpcms);
1318 }
1319 snd_soc_dpcm_stream_unlock_irq(fe, stream);
1320
1321 while (!list_empty(&deleted_dpcms)) {
1322 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1323 list_fe);
01d7584c 1324 list_del(&dpcm->list_fe);
9f620684 1325 dpcm_remove_debugfs_state(dpcm);
01d7584c
LG		 1326 kfree(dpcm);
1327 }
1328}
1329
1330/* get BE for DAI widget and stream */
1331static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1332 struct snd_soc_dapm_widget *widget, int stream)
1333{
1334 struct snd_soc_pcm_runtime *be;
93597fae 1335 struct snd_soc_dapm_widget *w;
7afecb30 1336 struct snd_soc_dai *dai;
1a497983 1337 int i;
01d7584c 1338
3c146465
LG		 1339 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1340
93597fae 1341 for_each_card_rtds(card, be) {
01d7584c 1342
93597fae
KM		 1343 if (!be->dai_link->no_pcm)
1344 continue;
35ea0655 1345
75459065
TI		 1346 if (!snd_soc_dpcm_get_substream(be, stream))
1347 continue;
1348
c840f769 1349 for_each_rtd_dais(be, i, dai) {
19bdcc7a 1350 w = snd_soc_dai_get_widget(dai, stream);
3c146465 1351
19bdcc7a
SN		 1352 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1353 w ? w->name : "(not set)");
2e5894d7 1354
19bdcc7a
SN		 1355 if (w == widget)
1356 return be;
1357 }
01d7584c
LG		 1358 }
1359
9d6ee365 1360 /* Widget provided is not a BE */
01d7584c
LG		 1361 return NULL;
1362}
1363
5edcf2a3 1364int widget_in_list(struct snd_soc_dapm_widget_list *list,
01d7584c
LG		 1365 struct snd_soc_dapm_widget *widget)
1366{
09e88f8a 1367 struct snd_soc_dapm_widget *w;
01d7584c
LG		 1368 int i;
1369
09e88f8a
KM		 1370 for_each_dapm_widgets(list, i, w)
1371 if (widget == w)
01d7584c 1372 return 1;
01d7584c
LG		 1373
1374 return 0;
1375}
5edcf2a3 1376EXPORT_SYMBOL_GPL(widget_in_list);
01d7584c 1377
d1a7af09 1378bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
5fdd022c
PS		 1379{
1380 struct snd_soc_card *card = widget->dapm->card;
1381 struct snd_soc_pcm_runtime *rtd;
c2cd8216 1382 int stream;
5fdd022c 1383
c2cd8216
KM		 1384 /* adjust dir to stream */
1385 if (dir == SND_SOC_DAPM_DIR_OUT)
1386 stream = SNDRV_PCM_STREAM_PLAYBACK;
1387 else
1388 stream = SNDRV_PCM_STREAM_CAPTURE;
5fdd022c 1389
027a4838
KM		 1390 rtd = dpcm_get_be(card, widget, stream);
1391 if (rtd)
1392 return true;
5fdd022c
PS		 1393
1394 return false;
1395}
d1a7af09 1396EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
5fdd022c 1397
23607025 1398int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1ce43acf 1399 int stream, struct snd_soc_dapm_widget_list **list)
01d7584c 1400{
c2233a26 1401 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
01d7584c
LG		 1402 int paths;
1403
3989ade2 1404 if (fe->dai_link->num_cpus > 1) {
6e1276a5
BL		 1405 dev_err(fe->dev,
1406 "%s doesn't support Multi CPU yet\n", __func__);
1407 return -EINVAL;
1408 }
1409
01d7584c 1410 /* get number of valid DAI paths and their widgets */
6742064a 1411 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
aa293777
SP		 1412 fe->card->component_chaining ?
1413 NULL : dpcm_end_walk_at_be);
01d7584c 1414
d479f00b
KM		 1415 if (paths > 0)
1416 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
01d7584c 1417 stream ? "capture" : "playback");
d479f00b
KM		 1418 else if (paths == 0)
1419 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1420 stream ? "capture" : "playback");
01d7584c 1421
01d7584c
LG		 1422 return paths;
1423}
1424
52645e33
KM		 1425void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1426{
1427 snd_soc_dapm_dai_free_widgets(list);
1428}
1429
8cce6569
GL		 1430static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1431 struct snd_soc_dapm_widget_list *list)
01d7584c 1432{
7afecb30 1433 struct snd_soc_dai *dai;
8cce6569
GL		 1434 unsigned int i;
1435
c840f769
KM		 1436 /* is there a valid DAI widget for this BE */
1437 for_each_rtd_dais(dpcm->be, i, dai) {
7931df9b 1438 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
8cce6569
GL		 1439
1440 /*
c840f769 1441 * The BE is pruned only if none of the dai
8cce6569
GL		 1442 * widgets are in the active list.
1443 */
1444 if (widget && widget_in_list(list, widget))
1445 return true;
1446 }
1447
8cce6569
GL		 1448 return false;
1449}
1450
1451static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1452 struct snd_soc_dapm_widget_list **list_)
1453{
1454 struct snd_soc_dpcm *dpcm;
01d7584c
LG		 1455 int prune = 0;
1456
1457 /* Destroy any old FE <--> BE connections */
8d6258a4 1458 for_each_dpcm_be(fe, stream, dpcm) {
8cce6569 1459 if (dpcm_be_is_active(dpcm, stream, *list_))
bed646dc 1460 continue;
01d7584c 1461
103d84a3 1462 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
01d7584c
LG		 1463 stream ? "capture" : "playback",
1464 dpcm->be->dai_link->name, fe->dai_link->name);
1465 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
a7e20444 1466 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
01d7584c
LG		 1467 prune++;
1468 }
1469
103d84a3 1470 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
01d7584c
LG		 1471 return prune;
1472}
1473
1474static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1475 struct snd_soc_dapm_widget_list **list_)
1476{
1477 struct snd_soc_card *card = fe->card;
1478 struct snd_soc_dapm_widget_list *list = *list_;
1479 struct snd_soc_pcm_runtime *be;
09e88f8a 1480 struct snd_soc_dapm_widget *widget;
0d3a5178 1481 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
01d7584c
LG		 1482 int i, new = 0, err;
1483
6932b20d 1484 /* don't connect if FE is not running */
0d3a5178 1485 if (!fe_substream->runtime && !fe->fe_compr)
6932b20d
KM		 1486 return new;
1487
01d7584c 1488 /* Create any new FE <--> BE connections */
09e88f8a 1489 for_each_dapm_widgets(list, i, widget) {
01d7584c 1490
09e88f8a 1491 switch (widget->id) {
4616274d 1492 case snd_soc_dapm_dai_in:
c5b8540d
KC		 1493 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1494 continue;
1495 break;
4616274d 1496 case snd_soc_dapm_dai_out:
c5b8540d
KC		 1497 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1498 continue;
4616274d
MB		 1499 break;
1500 default:
01d7584c 1501 continue;
4616274d 1502 }
01d7584c
LG		 1503
1504 /* is there a valid BE rtd for this widget */
09e88f8a 1505 be = dpcm_get_be(card, widget, stream);
01d7584c 1506 if (!be) {
b6eabd24
SW		 1507 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1508 widget->name);
01d7584c
LG		 1509 continue;
1510 }
1511
9609cfcd
PLB		 1512 /*
1513 * Filter for systems with 'component_chaining' enabled.
1514 * This helps to avoid unnecessary re-configuration of an
1515 * already active BE on such systems.
1516 */
1517 if (fe->card->component_chaining &&
1518 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
0c25db3f
SP		 1519 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1520 continue;
1521
01d7584c
LG		 1522 /* newly connected FE and BE */
1523 err = dpcm_be_connect(fe, be, stream);
1524 if (err < 0) {
103d84a3 1525 dev_err(fe->dev, "ASoC: can't connect %s\n",
09e88f8a 1526 widget->name);
01d7584c
LG		 1527 break;
1528 } else if (err == 0) /* already connected */
1529 continue;
1530
1531 /* new */
a7e20444 1532 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
01d7584c
LG		 1533 new++;
1534 }
1535
103d84a3 1536 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
01d7584c
LG		 1537 return new;
1538}
1539
1540/*
1541 * Find the corresponding BE DAIs that source or sink audio to this
1542 * FE substream.
1543 */
23607025 1544int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
01d7584c
LG		 1545 int stream, struct snd_soc_dapm_widget_list **list, int new)
1546{
1547 if (new)
1548 return dpcm_add_paths(fe, stream, list);
1549 else
1550 return dpcm_prune_paths(fe, stream, list);
1551}
1552
23607025 1553void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1554{
1555 struct snd_soc_dpcm *dpcm;
1556
8d6258a4 1557 for_each_dpcm_be(fe, stream, dpcm)
a7e20444 1558 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1559}
1560
531590bb
KM		 1561void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1562 int do_hw_free, struct snd_soc_dpcm *last)
01d7584c
LG		 1563{
1564 struct snd_soc_dpcm *dpcm;
1565
1566 /* disable any enabled and non active backends */
8d6258a4 1567 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1568 struct snd_soc_pcm_runtime *be = dpcm->be;
1569 struct snd_pcm_substream *be_substream =
1570 snd_soc_dpcm_get_substream(be, stream);
1571
531590bb
KM		 1572 if (dpcm == last)
1573 return;
1574
1575 /* is this op for this BE ? */
1576 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1577 continue;
1578
1db19c15 1579 if (be->dpcm[stream].users == 0) {
103d84a3 1580 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
01d7584c
LG		 1581 stream ? "capture" : "playback",
1582 be->dpcm[stream].state);
1db19c15
KM		 1583 continue;
1584 }
01d7584c
LG		 1585
1586 if (--be->dpcm[stream].users != 0)
1587 continue;
1588
531590bb
KM		 1589 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1590 if (!do_hw_free)
1591 continue;
1592
1593 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
b7898396 1594 __soc_pcm_hw_free(be, be_substream);
531590bb
KM		 1595 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1596 }
1597 }
01d7584c 1598
b7898396 1599 __soc_pcm_close(be, be_substream);
01d7584c
LG		 1600 be_substream->runtime = NULL;
1601 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1602 }
1603}
1604
23607025 1605int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c 1606{
0d3a5178 1607 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
06aaeb87 1608 struct snd_soc_pcm_runtime *be;
01d7584c
LG		 1609 struct snd_soc_dpcm *dpcm;
1610 int err, count = 0;
1611
1612 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
8d6258a4 1613 for_each_dpcm_be(fe, stream, dpcm) {
06aaeb87 1614 struct snd_pcm_substream *be_substream;
01d7584c 1615
06aaeb87
KM		 1616 be = dpcm->be;
1617 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c 1618
2062b4c5
RKAL		 1619 if (!be_substream) {
1620 dev_err(be->dev, "ASoC: no backend %s stream\n",
1621 stream ? "capture" : "playback");
1622 continue;
1623 }
1624
01d7584c
LG		 1625 /* is this op for this BE ? */
1626 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1627 continue;
1628
1629 /* first time the dpcm is open ? */
1db19c15 1630 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
103d84a3 1631 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
01d7584c
LG		 1632 stream ? "capture" : "playback",
1633 be->dpcm[stream].state);
1db19c15
KM		 1634 continue;
1635 }
01d7584c
LG		 1636
1637 if (be->dpcm[stream].users++ != 0)
1638 continue;
1639
1640 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1641 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1642 continue;
1643
2062b4c5
RKAL		 1644 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1645 stream ? "capture" : "playback", be->dai_link->name);
01d7584c 1646
0d3a5178 1647 be_substream->runtime = fe_substream->runtime;
b7898396 1648 err = __soc_pcm_open(be, be_substream);
01d7584c 1649 if (err < 0) {
01d7584c
LG		 1650 be->dpcm[stream].users--;
1651 if (be->dpcm[stream].users < 0)
103d84a3 1652 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
01d7584c
LG		 1653 stream ? "capture" : "playback",
1654 be->dpcm[stream].state);
1655
1656 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1657 goto unwind;
1658 }
848aedfd 1659 be->dpcm[stream].be_start = 0;
01d7584c
LG		 1660 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1661 count++;
1662 }
1663
1664 return count;
1665
1666unwind:
531590bb 1667 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
01d7584c 1668
04110728 1669 return soc_pcm_ret(fe, err);
01d7584c
LG		 1670}
1671
5f53898a
KM		 1672static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1673{
1674 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1675 struct snd_pcm_runtime *runtime = substream->runtime;
1676 struct snd_pcm_hardware *hw = &runtime->hw;
1677 struct snd_soc_dai *dai;
1678 int stream = substream->stream;
083a25b1 1679 u64 formats = hw->formats;
5f53898a
KM		 1680 int i;
1681
1682 soc_pcm_hw_init(hw);
1683
083a25b1
SW		 1684 if (formats)
1685 hw->formats &= formats;
1686
5f53898a
KM		 1687 for_each_rtd_cpu_dais(fe, i, dai) {
1688 struct snd_soc_pcm_stream *cpu_stream;
1689
1690 /*
1691 * Skip CPUs which don't support the current stream
1692 * type. See soc_pcm_init_runtime_hw() for more details
1693 */
1694 if (!snd_soc_dai_stream_valid(dai, stream))
1695 continue;
1696
1697 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1698
1699 soc_pcm_hw_update_rate(hw, cpu_stream);
1700 soc_pcm_hw_update_chan(hw, cpu_stream);
1701 soc_pcm_hw_update_format(hw, cpu_stream);
1702 }
1703
1704}
1705
1b8cb123 1706static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
b073ed4e 1707{
0ceef681 1708 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1709 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1710 struct snd_pcm_hardware *hw = &runtime->hw;
b073ed4e 1711 struct snd_soc_dpcm *dpcm;
7afecb30 1712 struct snd_soc_dai *dai;
b073ed4e
KM		 1713 int stream = substream->stream;
1714
1715 if (!fe->dai_link->dpcm_merged_format)
435ffb76 1716 return;
b073ed4e
KM		 1717
1718 /*
1719 * It returns merged BE codec format
1720 * if FE want to use it (= dpcm_merged_format)
1721 */
1722
8d6258a4 1723 for_each_dpcm_be(fe, stream, dpcm) {
b073ed4e 1724 struct snd_soc_pcm_runtime *be = dpcm->be;
b073ed4e
KM		 1725 struct snd_soc_pcm_stream *codec_stream;
1726 int i;
1727
a4be4187 1728 for_each_rtd_codec_dais(be, i, dai) {
4febced1
JB		 1729 /*
1730 * Skip CODECs which don't support the current stream
1731 * type. See soc_pcm_init_runtime_hw() for more details
1732 */
7afecb30 1733 if (!snd_soc_dai_stream_valid(dai, stream))
4febced1
JB		 1734 continue;
1735
acf253c1 1736 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
b073ed4e 1737
debc71f2 1738 soc_pcm_hw_update_format(hw, codec_stream);
b073ed4e
KM		 1739 }
1740 }
b073ed4e
KM		 1741}
1742
1b8cb123 1743static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
f4c277b8 1744{
0ceef681 1745 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1746 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1747 struct snd_pcm_hardware *hw = &runtime->hw;
f4c277b8
JW		 1748 struct snd_soc_dpcm *dpcm;
1749 int stream = substream->stream;
1750
1751 if (!fe->dai_link->dpcm_merged_chan)
1752 return;
1753
f4c277b8
JW		 1754 /*
1755 * It returns merged BE codec channel;
1756 * if FE want to use it (= dpcm_merged_chan)
1757 */
1758
8d6258a4 1759 for_each_dpcm_be(fe, stream, dpcm) {
f4c277b8 1760 struct snd_soc_pcm_runtime *be = dpcm->be;
4f2bd18b 1761 struct snd_soc_pcm_stream *cpu_stream;
19bdcc7a
SN		 1762 struct snd_soc_dai *dai;
1763 int i;
4f2bd18b 1764
a4be4187 1765 for_each_rtd_cpu_dais(be, i, dai) {
0e9cf4c4
BL		 1766 /*
1767 * Skip CPUs which don't support the current stream
1768 * type. See soc_pcm_init_runtime_hw() for more details
1769 */
1770 if (!snd_soc_dai_stream_valid(dai, stream))
1771 continue;
1772
19bdcc7a 1773 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
4f2bd18b 1774
6cb56a45 1775 soc_pcm_hw_update_chan(hw, cpu_stream);
19bdcc7a 1776 }
4f2bd18b
JB		 1777
1778 /*
1779 * chan min/max cannot be enforced if there are multiple CODEC
1780 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1781 */
3989ade2 1782 if (be->dai_link->num_codecs == 1) {
9bdc573d
KM		 1783 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1784 asoc_rtd_to_codec(be, 0), stream);
f4c277b8 1785
6cb56a45 1786 soc_pcm_hw_update_chan(hw, codec_stream);
f4c277b8
JW		 1787 }
1788 }
1789}
1790
1b8cb123 1791static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
baacd8d1 1792{
0ceef681 1793 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1b8cb123 1794 struct snd_pcm_runtime *runtime = substream->runtime;
4b260f42 1795 struct snd_pcm_hardware *hw = &runtime->hw;
baacd8d1
JB		 1796 struct snd_soc_dpcm *dpcm;
1797 int stream = substream->stream;
1798
1799 if (!fe->dai_link->dpcm_merged_rate)
1800 return;
1801
1802 /*
1803 * It returns merged BE codec channel;
1804 * if FE want to use it (= dpcm_merged_chan)
1805 */
1806
8d6258a4 1807 for_each_dpcm_be(fe, stream, dpcm) {
baacd8d1 1808 struct snd_soc_pcm_runtime *be = dpcm->be;
c840f769 1809 struct snd_soc_pcm_stream *pcm;
7afecb30 1810 struct snd_soc_dai *dai;
baacd8d1
JB		 1811 int i;
1812
c840f769 1813 for_each_rtd_dais(be, i, dai) {
baacd8d1 1814 /*
c840f769 1815 * Skip DAIs which don't support the current stream
baacd8d1
JB		 1816 * type. See soc_pcm_init_runtime_hw() for more details
1817 */
7afecb30 1818 if (!snd_soc_dai_stream_valid(dai, stream))
baacd8d1
JB		 1819 continue;
1820
c840f769 1821 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
baacd8d1 1822
f6c04af5 1823 soc_pcm_hw_update_rate(hw, pcm);
baacd8d1
JB		 1824 }
1825 }
1826}
1827
906c7d69
PL		 1828static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1829 int stream)
1830{
1831 struct snd_soc_dpcm *dpcm;
0ceef681 1832 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
19bdcc7a 1833 struct snd_soc_dai *fe_cpu_dai;
12ffd726 1834 int err = 0;
19bdcc7a 1835 int i;
906c7d69
PL		 1836
1837 /* apply symmetry for FE */
68cbc557 1838 soc_pcm_update_symmetry(fe_substream);
906c7d69 1839
a4be4187 1840 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
19bdcc7a 1841 /* Symmetry only applies if we've got an active stream. */
f8fc9ec5
KM		 1842 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1843 if (err < 0)
bbd2bac8 1844 goto error;
906c7d69
PL		 1845 }
1846
1847 /* apply symmetry for BE */
8d6258a4 1848 for_each_dpcm_be(fe, stream, dpcm) {
906c7d69
PL		 1849 struct snd_soc_pcm_runtime *be = dpcm->be;
1850 struct snd_pcm_substream *be_substream =
1851 snd_soc_dpcm_get_substream(be, stream);
6246f283 1852 struct snd_soc_pcm_runtime *rtd;
c840f769 1853 struct snd_soc_dai *dai;
906c7d69 1854
6246f283
JB		 1855 /* A backend may not have the requested substream */
1856 if (!be_substream)
1857 continue;
1858
0ceef681 1859 rtd = asoc_substream_to_rtd(be_substream);
f1176614
JK		 1860 if (rtd->dai_link->be_hw_params_fixup)
1861 continue;
1862
68cbc557 1863 soc_pcm_update_symmetry(be_substream);
906c7d69
PL		 1864
1865 /* Symmetry only applies if we've got an active stream. */
c840f769 1866 for_each_rtd_dais(rtd, i, dai) {
f8fc9ec5
KM		 1867 err = soc_pcm_apply_symmetry(fe_substream, dai);
1868 if (err < 0)
bbd2bac8 1869 goto error;
906c7d69
PL		 1870 }
1871 }
bbd2bac8 1872error:
04110728 1873 return soc_pcm_ret(fe, err);
906c7d69
PL		 1874}
1875
01d7584c
LG		 1876static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1877{
0ceef681 1878 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c
LG		 1879 int stream = fe_substream->stream, ret = 0;
1880
ea9d0d77 1881 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 1882
25c2f515 1883 ret = dpcm_be_dai_startup(fe, stream);
06aaeb87 1884 if (ret < 0)
01d7584c 1885 goto be_err;
01d7584c 1886
103d84a3 1887 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
01d7584c
LG		 1888
1889 /* start the DAI frontend */
b7898396 1890 ret = __soc_pcm_open(fe, fe_substream);
e4b044f4 1891 if (ret < 0)
01d7584c 1892 goto unwind;
01d7584c
LG		 1893
1894 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1895
4fe28461
KM		 1896 dpcm_runtime_setup_fe(fe_substream);
1897
1898 dpcm_runtime_setup_be_format(fe_substream);
1899 dpcm_runtime_setup_be_chan(fe_substream);
1900 dpcm_runtime_setup_be_rate(fe_substream);
01d7584c 1901
906c7d69 1902 ret = dpcm_apply_symmetry(fe_substream, stream);
01d7584c
LG		 1903
1904unwind:
8a01fbf0
KM		 1905 if (ret < 0)
1906 dpcm_be_dai_startup_unwind(fe, stream);
01d7584c 1907be_err:
ea9d0d77 1908 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
06aaeb87 1909
04110728 1910 return soc_pcm_ret(fe, ret);
01d7584c
LG		 1911}
1912
01d7584c
LG		 1913static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1914{
0ceef681 1915 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 1916 int stream = substream->stream;
1917
b7898396
TI		 1918 snd_soc_dpcm_mutex_assert_held(fe);
1919
ea9d0d77 1920 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 1921
1922 /* shutdown the BEs */
25c2f515 1923 dpcm_be_dai_shutdown(fe, stream);
01d7584c 1924
103d84a3 1925 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
01d7584c
LG		 1926
1927 /* now shutdown the frontend */
b7898396 1928 __soc_pcm_close(fe, substream);
01d7584c 1929
bb9dd3ce
RS		 1930 /* run the stream stop event */
1931 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1932
01d7584c 1933 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
ea9d0d77 1934 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c
LG		 1935 return 0;
1936}
1937
f52366e6 1938void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 1939{
1940 struct snd_soc_dpcm *dpcm;
1941
1942 /* only hw_params backends that are either sinks or sources
1943 * to this frontend DAI */
8d6258a4 1944 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 1945
1946 struct snd_soc_pcm_runtime *be = dpcm->be;
1947 struct snd_pcm_substream *be_substream =
1948 snd_soc_dpcm_get_substream(be, stream);
1949
1950 /* is this op for this BE ? */
1951 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1952 continue;
1953
1954 /* only free hw when no longer used - check all FEs */
1955 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1956 continue;
1957
36fba62c
QZ		 1958 /* do not free hw if this BE is used by other FE */
1959 if (be->dpcm[stream].users > 1)
1960 continue;
1961
01d7584c
LG		 1962 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1963 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1964 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
08b27848 1965 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
5e82d2be
VK		 1966 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1967 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
01d7584c
LG		 1968 continue;
1969
103d84a3 1970 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
94d215cc 1971 be->dai_link->name);
01d7584c 1972
b7898396 1973 __soc_pcm_hw_free(be, be_substream);
01d7584c
LG		 1974
1975 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1976 }
01d7584c
LG		 1977}
1978
45c0a188 1979static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
01d7584c 1980{
0ceef681 1981 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
f52366e6 1982 int stream = substream->stream;
01d7584c 1983
b7898396 1984 snd_soc_dpcm_mutex_lock(fe);
ea9d0d77 1985 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 1986
103d84a3 1987 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
01d7584c
LG		 1988
1989 /* call hw_free on the frontend */
b7898396 1990 soc_pcm_hw_clean(fe, substream, 0);
01d7584c
LG		 1991
1992 /* only hw_params backends that are either sinks or sources
1993 * to this frontend DAI */
f52366e6 1994 dpcm_be_dai_hw_free(fe, stream);
01d7584c
LG		 1995
1996 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
ea9d0d77 1997 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
01d7584c 1998
b7898396 1999 snd_soc_dpcm_mutex_unlock(fe);
01d7584c
LG		 2000 return 0;
2001}
2002
23607025 2003int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c 2004{
33b6b94f
KM		 2005 struct snd_soc_pcm_runtime *be;
2006 struct snd_pcm_substream *be_substream;
01d7584c
LG		 2007 struct snd_soc_dpcm *dpcm;
2008 int ret;
2009
8d6258a4 2010 for_each_dpcm_be(fe, stream, dpcm) {
25106550
KM		 2011 struct snd_pcm_hw_params hw_params;
2012
33b6b94f
KM		 2013 be = dpcm->be;
2014 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c
LG		 2015
2016 /* is this op for this BE ? */
2017 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2018 continue;
2019
01d7584c 2020 /* copy params for each dpcm */
25106550 2021 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
01d7584c
LG		 2022 sizeof(struct snd_pcm_hw_params));
2023
2024 /* perform any hw_params fixups */
25106550 2025 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
0cbbf8a0
KM		 2026 if (ret < 0)
2027 goto unwind;
01d7584c 2028
ae061d2a 2029 /* copy the fixed-up hw params for BE dai */
25106550 2030 memcpy(&be->dpcm[stream].hw_params, &hw_params,
ae061d2a
LY		 2031 sizeof(struct snd_pcm_hw_params));
2032
b0639bd2
KM		 2033 /* only allow hw_params() if no connected FEs are running */
2034 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2035 continue;
2036
2037 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2038 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2039 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2040 continue;
2041
2042 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
94d215cc 2043 be->dai_link->name);
b0639bd2 2044
25106550 2045 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
cb11f79b 2046 if (ret < 0)
01d7584c 2047 goto unwind;
01d7584c
LG		 2048
2049 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2050 }
2051 return 0;
2052
2053unwind:
33b6b94f
KM		 2054 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2055 __func__, be->dai_link->name, ret);
2056
01d7584c 2057 /* disable any enabled and non active backends */
8d6258a4 2058 for_each_dpcm_be_rollback(fe, stream, dpcm) {
33b6b94f
KM		 2059 be = dpcm->be;
2060 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c
LG		 2061
2062 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2063 continue;
2064
2065 /* only allow hw_free() if no connected FEs are running */
2066 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2067 continue;
2068
2069 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2070 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2072 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2073 continue;
2074
b7898396 2075 __soc_pcm_hw_free(be, be_substream);
01d7584c
LG		 2076 }
2077
2078 return ret;
2079}
2080
45c0a188
MB		 2081static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2082 struct snd_pcm_hw_params *params)
01d7584c 2083{
0ceef681 2084 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 2085 int ret, stream = substream->stream;
2086
b7898396 2087 snd_soc_dpcm_mutex_lock(fe);
ea9d0d77 2088 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c 2089
25c2f515 2090 memcpy(&fe->dpcm[stream].hw_params, params,
01d7584c 2091 sizeof(struct snd_pcm_hw_params));
25c2f515 2092 ret = dpcm_be_dai_hw_params(fe, stream);
33b6b94f 2093 if (ret < 0)
01d7584c 2094 goto out;
01d7584c 2095
103d84a3 2096 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
01d7584c
LG		 2097 fe->dai_link->name, params_rate(params),
2098 params_channels(params), params_format(params));
2099
2100 /* call hw_params on the frontend */
b7898396 2101 ret = __soc_pcm_hw_params(fe, substream, params);
cb11f79b 2102 if (ret < 0)
01d7584c 2103 dpcm_be_dai_hw_free(fe, stream);
cb11f79b 2104 else
01d7584c
LG		 2105 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2106
2107out:
ea9d0d77 2108 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
b7898396 2109 snd_soc_dpcm_mutex_unlock(fe);
33b6b94f 2110
04110728 2111 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2112}
2113
23607025 2114int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
45c0a188 2115 int cmd)
01d7584c 2116{
db3aa39c 2117 struct snd_soc_pcm_runtime *be;
9995c1d0 2118 bool pause_stop_transition;
01d7584c 2119 struct snd_soc_dpcm *dpcm;
b2ae8066 2120 unsigned long flags;
01d7584c
LG		 2121 int ret = 0;
2122
8d6258a4 2123 for_each_dpcm_be(fe, stream, dpcm) {
db3aa39c 2124 struct snd_pcm_substream *be_substream;
01d7584c 2125
db3aa39c
KM		 2126 be = dpcm->be;
2127 be_substream = snd_soc_dpcm_get_substream(be, stream);
01d7584c 2128
3c75c0ea 2129 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags);
b2ae8066 2130
01d7584c
LG		 2131 /* is this op for this BE ? */
2132 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
b2ae8066 2133 goto next;
01d7584c 2134
a9faca15
KM		 2135 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2136 be->dai_link->name, cmd);
2137
01d7584c
LG		 2138 switch (cmd) {
2139 case SNDRV_PCM_TRIGGER_START:
848aedfd
PLB		 2140 if (!be->dpcm[stream].be_start &&
2141 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
21fca8bd 2142 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
3202e2f5 2143 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2144 goto next;
6479f758 2145
848aedfd
PLB		 2146 be->dpcm[stream].be_start++;
2147 if (be->dpcm[stream].be_start != 1)
2148 goto next;
2149
374b50e2
PLB		 2150 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2151 ret = soc_pcm_trigger(be_substream,
2152 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2153 else
2154 ret = soc_pcm_trigger(be_substream,
2155 SNDRV_PCM_TRIGGER_START);
848aedfd
PLB		 2156 if (ret) {
2157 be->dpcm[stream].be_start--;
b2ae8066 2158 goto next;
848aedfd 2159 }
01d7584c 2160
3202e2f5 2161 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2162 break;
2163 case SNDRV_PCM_TRIGGER_RESUME:
3202e2f5 2164 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
b2ae8066 2165 goto next;
6479f758 2166
848aedfd
PLB		 2167 be->dpcm[stream].be_start++;
2168 if (be->dpcm[stream].be_start != 1)
2169 goto next;
2170
a9faca15 2171 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2172 if (ret) {
2173 be->dpcm[stream].be_start--;
b2ae8066 2174 goto next;
848aedfd 2175 }
01d7584c 2176
3202e2f5 2177 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2178 break;
2179 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
3aa1e96a
PLB		 2180 if (!be->dpcm[stream].be_start &&
2181 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
3aa1e96a 2182 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2183 goto next;
6479f758 2184
9995c1d0
PLB		 2185 fe->dpcm[stream].fe_pause = false;
2186 be->dpcm[stream].be_pause--;
2187
848aedfd
PLB		 2188 be->dpcm[stream].be_start++;
2189 if (be->dpcm[stream].be_start != 1)
2190 goto next;
2191
a9faca15 2192 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2193 if (ret) {
2194 be->dpcm[stream].be_start--;
b2ae8066 2195 goto next;
848aedfd 2196 }
01d7584c 2197
3202e2f5 2198 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
01d7584c
LG		 2199 break;
2200 case SNDRV_PCM_TRIGGER_STOP:
21fca8bd 2201 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
3202e2f5 2202 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
b2ae8066 2203 goto next;
01d7584c 2204
848aedfd
PLB		 2205 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2206 be->dpcm[stream].be_start--;
2207
2208 if (be->dpcm[stream].be_start != 0)
b2ae8066 2209 goto next;
0c75fc71 2210
9995c1d0
PLB		 2211 pause_stop_transition = false;
2212 if (fe->dpcm[stream].fe_pause) {
2213 pause_stop_transition = true;
2214 fe->dpcm[stream].fe_pause = false;
2215 be->dpcm[stream].be_pause--;
2216 }
2217
2218 if (be->dpcm[stream].be_pause != 0)
2219 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2220 else
2221 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2222
848aedfd
PLB		 2223 if (ret) {
2224 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2225 be->dpcm[stream].be_start++;
9995c1d0
PLB		 2226 if (pause_stop_transition) {
2227 fe->dpcm[stream].fe_pause = true;
2228 be->dpcm[stream].be_pause++;
2229 }
b2ae8066 2230 goto next;
848aedfd 2231 }
01d7584c 2232
9995c1d0
PLB		 2233 if (be->dpcm[stream].be_pause != 0)
2234 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2235 else
2236 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2237
01d7584c
LG		 2238 break;
2239 case SNDRV_PCM_TRIGGER_SUSPEND:
3202e2f5 2240 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
b2ae8066 2241 goto next;
01d7584c 2242
848aedfd
PLB		 2243 be->dpcm[stream].be_start--;
2244 if (be->dpcm[stream].be_start != 0)
b2ae8066 2245 goto next;
01d7584c 2246
a9faca15 2247 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2248 if (ret) {
2249 be->dpcm[stream].be_start++;
b2ae8066 2250 goto next;
848aedfd 2251 }
01d7584c 2252
3202e2f5 2253 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
01d7584c
LG		 2254 break;
2255 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
3202e2f5 2256 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
b2ae8066 2257 goto next;
01d7584c 2258
9995c1d0
PLB		 2259 fe->dpcm[stream].fe_pause = true;
2260 be->dpcm[stream].be_pause++;
2261
848aedfd
PLB		 2262 be->dpcm[stream].be_start--;
2263 if (be->dpcm[stream].be_start != 0)
b2ae8066 2264 goto next;
01d7584c 2265
a9faca15 2266 ret = soc_pcm_trigger(be_substream, cmd);
848aedfd
PLB		 2267 if (ret) {
2268 be->dpcm[stream].be_start++;
b2ae8066 2269 goto next;
848aedfd 2270 }
01d7584c 2271
3202e2f5 2272 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
01d7584c
LG		 2273 break;
2274 }
b2ae8066
TI		 2275next:
2276 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags);
2277 if (ret)
2278 break;
01d7584c 2279 }
04110728 2280 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2281}
2282EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2283
acbf2774
RS		 2284static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2285 int cmd, bool fe_first)
2286{
0ceef681 2287 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
acbf2774
RS		 2288 int ret;
2289
2290 /* call trigger on the frontend before the backend. */
2291 if (fe_first) {
2292 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2293 fe->dai_link->name, cmd);
2294
2295 ret = soc_pcm_trigger(substream, cmd);
2296 if (ret < 0)
2297 return ret;
2298
2299 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2300 return ret;
2301 }
2302
2303 /* call trigger on the frontend after the backend. */
2304 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2305 if (ret < 0)
2306 return ret;
2307
2308 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2309 fe->dai_link->name, cmd);
2310
2311 ret = soc_pcm_trigger(substream, cmd);
2312
2313 return ret;
2314}
2315
ea9d0d77 2316static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
01d7584c 2317{
0ceef681 2318 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
acbf2774
RS		 2319 int stream = substream->stream;
2320 int ret = 0;
01d7584c
LG		 2321 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2322
2323 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2324
2325 switch (trigger) {
2326 case SND_SOC_DPCM_TRIGGER_PRE:
acbf2774
RS		 2327 switch (cmd) {
2328 case SNDRV_PCM_TRIGGER_START:
2329 case SNDRV_PCM_TRIGGER_RESUME:
2330 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
4c22b80f 2331 case SNDRV_PCM_TRIGGER_DRAIN:
acbf2774
RS		 2332 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2333 break;
2334 case SNDRV_PCM_TRIGGER_STOP:
2335 case SNDRV_PCM_TRIGGER_SUSPEND:
2336 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2337 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2338 break;
2339 default:
2340 ret = -EINVAL;
2341 break;
01d7584c 2342 }
01d7584c
LG		 2343 break;
2344 case SND_SOC_DPCM_TRIGGER_POST:
acbf2774
RS		 2345 switch (cmd) {
2346 case SNDRV_PCM_TRIGGER_START:
2347 case SNDRV_PCM_TRIGGER_RESUME:
2348 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
4c22b80f 2349 case SNDRV_PCM_TRIGGER_DRAIN:
acbf2774
RS		 2350 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2351 break;
2352 case SNDRV_PCM_TRIGGER_STOP:
2353 case SNDRV_PCM_TRIGGER_SUSPEND:
2354 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2355 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2356 break;
2357 default:
2358 ret = -EINVAL;
2359 break;
01d7584c 2360 }
01d7584c 2361 break;
07bf84aa
LG		 2362 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2363 /* bespoke trigger() - handles both FE and BEs */
2364
103d84a3 2365 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
07bf84aa
LG		 2366 fe->dai_link->name, cmd);
2367
30819358 2368 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
07bf84aa 2369 break;
01d7584c 2370 default:
103d84a3 2371 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
01d7584c
LG		 2372 fe->dai_link->name);
2373 ret = -EINVAL;
2374 goto out;
2375 }
2376
acbf2774
RS		 2377 if (ret < 0) {
2378 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2379 cmd, ret);
2380 goto out;
2381 }
2382
01d7584c
LG		 2383 switch (cmd) {
2384 case SNDRV_PCM_TRIGGER_START:
2385 case SNDRV_PCM_TRIGGER_RESUME:
2386 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2387 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2388 break;
2389 case SNDRV_PCM_TRIGGER_STOP:
2390 case SNDRV_PCM_TRIGGER_SUSPEND:
01d7584c
LG		 2391 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2392 break;
9f169b9f
PL		 2393 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2394 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2395 break;
01d7584c
LG		 2396 }
2397
2398out:
2399 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2400 return ret;
2401}
2402
ea9d0d77
TI		 2403static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2404{
0ceef681 2405 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
ea9d0d77
TI		 2406 int stream = substream->stream;
2407
2408 /* if FE's runtime_update is already set, we're in race;
2409 * process this trigger later at exit
2410 */
2411 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2412 fe->dpcm[stream].trigger_pending = cmd + 1;
2413 return 0; /* delayed, assuming it's successful */
2414 }
2415
2416 /* we're alone, let's trigger */
2417 return dpcm_fe_dai_do_trigger(substream, cmd);
2418}
2419
23607025 2420int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
01d7584c
LG		 2421{
2422 struct snd_soc_dpcm *dpcm;
2423 int ret = 0;
2424
8d6258a4 2425 for_each_dpcm_be(fe, stream, dpcm) {
01d7584c
LG		 2426
2427 struct snd_soc_pcm_runtime *be = dpcm->be;
2428 struct snd_pcm_substream *be_substream =
2429 snd_soc_dpcm_get_substream(be, stream);
2430
2431 /* is this op for this BE ? */
2432 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2433 continue;
2434
e123036b
RS		 2435 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2436 continue;
2437
01d7584c 2438 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
95f444dc 2439 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
5087a8f1
LY		 2440 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2441 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
01d7584c
LG		 2442 continue;
2443
103d84a3 2444 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
94d215cc 2445 be->dai_link->name);
01d7584c 2446
b7898396 2447 ret = __soc_pcm_prepare(be, be_substream);
dab7eeb4 2448 if (ret < 0)
01d7584c 2449 break;
01d7584c
LG		 2450
2451 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2452 }
273db971 2453
04110728 2454 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2455}
2456
45c0a188 2457static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
01d7584c 2458{
0ceef681 2459 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
01d7584c
LG		 2460 int stream = substream->stream, ret = 0;
2461
b7898396 2462 snd_soc_dpcm_mutex_lock(fe);
01d7584c 2463
103d84a3 2464 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
01d7584c 2465
ea9d0d77 2466 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
01d7584c
LG		 2467
2468 /* there is no point preparing this FE if there are no BEs */
2469 if (list_empty(&fe->dpcm[stream].be_clients)) {
1f566435
HG		 2470 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2471 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2472 fe->dai_link->name);
2473 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2474 fe->dai_link->name);
01d7584c
LG		 2475 ret = -EINVAL;
2476 goto out;
2477 }
2478
25c2f515 2479 ret = dpcm_be_dai_prepare(fe, stream);
01d7584c
LG		 2480 if (ret < 0)
2481 goto out;
2482
2483 /* call prepare on the frontend */
b7898396 2484 ret = __soc_pcm_prepare(fe, substream);
dab7eeb4 2485 if (ret < 0)
01d7584c 2486 goto out;
01d7584c 2487
01d7584c
LG		 2488 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2489
2490out:
ea9d0d77 2491 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
b7898396 2492 snd_soc_dpcm_mutex_unlock(fe);
01d7584c 2493
04110728 2494 return soc_pcm_ret(fe, ret);
01d7584c
LG		 2495}
2496
618dae11
LG		 2497static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2498{
07bf84aa
LG		 2499 struct snd_pcm_substream *substream =
2500 snd_soc_dpcm_get_substream(fe, stream);
2501 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
618dae11
LG		 2502 int err;
2503
103d84a3 2504 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
618dae11
LG		 2505 stream ? "capture" : "playback", fe->dai_link->name);
2506
07bf84aa
LG		 2507 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2508 /* call bespoke trigger - FE takes care of all BE triggers */
103d84a3 2509 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
07bf84aa
LG		 2510 fe->dai_link->name);
2511
30819358 2512 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
07bf84aa 2513 } else {
103d84a3 2514 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
07bf84aa
LG		 2515 fe->dai_link->name);
2516
2517 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
07bf84aa 2518 }
618dae11 2519
f52366e6 2520 dpcm_be_dai_hw_free(fe, stream);
618dae11 2521
531590bb 2522 dpcm_be_dai_shutdown(fe, stream);
618dae11
LG		 2523
2524 /* run the stream event for each BE */
2525 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2526
04110728 2527 return soc_pcm_ret(fe, err);
618dae11
LG		 2528}
2529
2530static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2531{
07bf84aa
LG		 2532 struct snd_pcm_substream *substream =
2533 snd_soc_dpcm_get_substream(fe, stream);
618dae11 2534 struct snd_soc_dpcm *dpcm;
07bf84aa 2535 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
4eeed5f4 2536 int ret = 0;
618dae11 2537
103d84a3 2538 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
618dae11
LG		 2539 stream ? "capture" : "playback", fe->dai_link->name);
2540
2541 /* Only start the BE if the FE is ready */
2542 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2c138284 2543 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2544 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2545 fe->dai_link->name, fe->dpcm[stream].state);
e91b65b3 2546 ret = -EINVAL;
2c138284 2547 goto disconnect;
2548 }
618dae11
LG		 2549
2550 /* startup must always be called for new BEs */
2551 ret = dpcm_be_dai_startup(fe, stream);
fffc0ca2 2552 if (ret < 0)
618dae11 2553 goto disconnect;
618dae11
LG		 2554
2555 /* keep going if FE state is > open */
2556 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2557 return 0;
01d7584c 2558
618dae11 2559 ret = dpcm_be_dai_hw_params(fe, stream);
fffc0ca2 2560 if (ret < 0)
618dae11 2561 goto close;
618dae11
LG		 2562
2563 /* keep going if FE state is > hw_params */
2564 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2565 return 0;
2566
618dae11 2567 ret = dpcm_be_dai_prepare(fe, stream);
fffc0ca2 2568 if (ret < 0)
618dae11 2569 goto hw_free;
618dae11
LG		 2570
2571 /* run the stream event for each BE */
2572 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2573
2574 /* keep going if FE state is > prepare */
2575 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2576 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2577 return 0;
2578
07bf84aa
LG		 2579 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2580 /* call trigger on the frontend - FE takes care of all BE triggers */
103d84a3 2581 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
07bf84aa 2582 fe->dai_link->name);
618dae11 2583
30819358 2584 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
62462e01 2585 if (ret < 0)
07bf84aa 2586 goto hw_free;
07bf84aa 2587 } else {
103d84a3 2588 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
07bf84aa
LG		 2589 fe->dai_link->name);
2590
2591 ret = dpcm_be_dai_trigger(fe, stream,
2592 SNDRV_PCM_TRIGGER_START);
db3aa39c 2593 if (ret < 0)
07bf84aa 2594 goto hw_free;
618dae11
LG		 2595 }
2596
2597 return 0;
2598
2599hw_free:
2600 dpcm_be_dai_hw_free(fe, stream);
2601close:
2602 dpcm_be_dai_shutdown(fe, stream);
2603disconnect:
2c138284 2604 /* disconnect any pending BEs */
8d6258a4 2605 for_each_dpcm_be(fe, stream, dpcm) {
618dae11 2606 struct snd_soc_pcm_runtime *be = dpcm->be;
2c138284 2607
2608 /* is this op for this BE ? */
2609 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2610 continue;
2611
2612 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2613 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2614 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
618dae11
LG		 2615 }
2616
04110728 2617 return soc_pcm_ret(fe, ret);
618dae11
LG		 2618}
2619
de15d7ff 2620static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
618dae11 2621{
de15d7ff 2622 struct snd_soc_dapm_widget_list *list;
7083f877 2623 int stream;
de15d7ff 2624 int count, paths;
618dae11 2625
96bf62f0
PLB		 2626 if (!fe->dai_link->dynamic)
2627 return 0;
2628
3989ade2 2629 if (fe->dai_link->num_cpus > 1) {
6e1276a5
BL		 2630 dev_err(fe->dev,
2631 "%s doesn't support Multi CPU yet\n", __func__);
2632 return -EINVAL;
2633 }
2634
de15d7ff 2635 /* only check active links */
b3dea624 2636 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
de15d7ff 2637 return 0;
618dae11 2638
de15d7ff
JB		 2639 /* DAPM sync will call this to update DSP paths */
2640 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2641 new ? "new" : "old", fe->dai_link->name);
618dae11 2642
7083f877 2643 for_each_pcm_streams(stream) {
618dae11 2644
7083f877 2645 /* skip if FE doesn't have playback/capture capability */
c2233a26
KM		 2646 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2647 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
7083f877 2648 continue;
de15d7ff 2649
7083f877 2650 /* skip if FE isn't currently playing/capturing */
b3dea624
KM		 2651 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2652 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
7083f877 2653 continue;
075207d2 2654
7083f877 2655 paths = dpcm_path_get(fe, stream, &list);
d479f00b 2656 if (paths < 0)
7083f877 2657 return paths;
618dae11 2658
7083f877
KM		 2659 /* update any playback/capture paths */
2660 count = dpcm_process_paths(fe, stream, &list, new);
2661 if (count) {
580dff36 2662 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
7083f877 2663 if (new)
81c82a9e 2664 dpcm_run_update_startup(fe, stream);
7083f877 2665 else
81c82a9e 2666 dpcm_run_update_shutdown(fe, stream);
580dff36 2667 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
618dae11 2668
7083f877
KM		 2669 dpcm_clear_pending_state(fe, stream);
2670 dpcm_be_disconnect(fe, stream);
2671 }
618dae11 2672
7083f877 2673 dpcm_path_put(&list);
618dae11
LG		 2674 }
2675
618dae11
LG		 2676 return 0;
2677}
de15d7ff
JB		 2678
2679/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2680 * any DAI links.
2681 */
f17a1478 2682int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
de15d7ff
JB		 2683{
2684 struct snd_soc_pcm_runtime *fe;
2685 int ret = 0;
2686
38e42f6d 2687 snd_soc_dpcm_mutex_lock(card);
de15d7ff 2688 /* shutdown all old paths first */
bcb1fd1f 2689 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2690 ret = soc_dpcm_fe_runtime_update(fe, 0);
2691 if (ret)
2692 goto out;
2693 }
2694
2695 /* bring new paths up */
bcb1fd1f 2696 for_each_card_rtds(card, fe) {
de15d7ff
JB		 2697 ret = soc_dpcm_fe_runtime_update(fe, 1);
2698 if (ret)
2699 goto out;
2700 }
2701
2702out:
38e42f6d 2703 snd_soc_dpcm_mutex_unlock(card);
de15d7ff
JB		 2704 return ret;
2705}
f17a1478 2706EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
01d7584c 2707
265694b6 2708static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
01d7584c 2709{
0ceef681 2710 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c 2711 struct snd_soc_dpcm *dpcm;
265694b6 2712 int stream = fe_substream->stream;
30fca26f 2713
b7898396
TI		 2714 snd_soc_dpcm_mutex_assert_held(fe);
2715
30fca26f
KM		 2716 /* mark FE's links ready to prune */
2717 for_each_dpcm_be(fe, stream, dpcm)
2718 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2719
2720 dpcm_be_disconnect(fe, stream);
265694b6
KM		 2721}
2722
2723static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2724{
0ceef681 2725 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
265694b6
KM		 2726 int ret;
2727
b7898396 2728 snd_soc_dpcm_mutex_lock(fe);
265694b6
KM		 2729 ret = dpcm_fe_dai_shutdown(fe_substream);
2730
2731 dpcm_fe_dai_cleanup(fe_substream);
2732
b7898396 2733 snd_soc_dpcm_mutex_unlock(fe);
30fca26f
KM		 2734 return ret;
2735}
2736
45c0a188 2737static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
01d7584c 2738{
0ceef681 2739 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
01d7584c
LG		 2740 struct snd_soc_dapm_widget_list *list;
2741 int ret;
2742 int stream = fe_substream->stream;
2743
b7898396 2744 snd_soc_dpcm_mutex_lock(fe);
01d7584c 2745
8f70e515 2746 ret = dpcm_path_get(fe, stream, &list);
d479f00b 2747 if (ret < 0)
cae06eb9 2748 goto open_end;
01d7584c
LG		 2749
2750 /* calculate valid and active FE <-> BE dpcms */
2751 dpcm_process_paths(fe, stream, &list, 1);
2752
2753 ret = dpcm_fe_dai_startup(fe_substream);
265694b6
KM		 2754 if (ret < 0)
2755 dpcm_fe_dai_cleanup(fe_substream);
01d7584c
LG		 2756
2757 dpcm_clear_pending_state(fe, stream);
2758 dpcm_path_put(&list);
cae06eb9 2759open_end:
b7898396 2760 snd_soc_dpcm_mutex_unlock(fe);
01d7584c
LG		 2761 return ret;
2762}
2763
7fc6bebd
KM		 2764static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2765 int *playback, int *capture)
ddee627c 2766{
cfcb31c4 2767 struct snd_soc_dai_link *dai_link = rtd->dai_link;
19bdcc7a 2768 struct snd_soc_dai *cpu_dai;
c3e9b6d6
KM		 2769 int has_playback = 0;
2770 int has_capture = 0;
2e5894d7 2771 int i;
ddee627c 2772
cfcb31c4 2773 if (dai_link->dynamic && dai_link->num_cpus > 1) {
a1c0221f 2774 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
b73287f0
PLB		 2775 return -EINVAL;
2776 }
2777
cfcb31c4 2778 if (dai_link->dynamic || dai_link->no_pcm) {
940a1f43
KM		 2779 int stream;
2780
cfcb31c4 2781 if (dai_link->dpcm_playback) {
b73287f0
PLB		 2782 stream = SNDRV_PCM_STREAM_PLAYBACK;
2783
4f872154
PLB		 2784 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2785 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
c3e9b6d6 2786 has_playback = 1;
4f872154 2787 break;
b73287f0 2788 }
4f872154 2789 }
c3e9b6d6 2790 if (!has_playback) {
4f872154
PLB		 2791 dev_err(rtd->card->dev,
2792 "No CPU DAIs support playback for stream %s\n",
cfcb31c4 2793 dai_link->stream_name);
4f872154
PLB		 2794 return -EINVAL;
2795 }
b73287f0 2796 }
cfcb31c4 2797 if (dai_link->dpcm_capture) {
b73287f0
PLB		 2798 stream = SNDRV_PCM_STREAM_CAPTURE;
2799
4f872154
PLB		 2800 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2801 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
c3e9b6d6 2802 has_capture = 1;
4f872154 2803 break;
b73287f0 2804 }
4f872154
PLB		 2805 }
2806
c3e9b6d6 2807 if (!has_capture) {
4f872154
PLB		 2808 dev_err(rtd->card->dev,
2809 "No CPU DAIs support capture for stream %s\n",
cfcb31c4 2810 dai_link->stream_name);
4f872154
PLB		 2811 return -EINVAL;
2812 }
9b5db059 2813 }
01d7584c 2814 } else {
940a1f43
KM		 2815 struct snd_soc_dai *codec_dai;
2816
a342031c 2817 /* Adapt stream for codec2codec links */
1c943f60
KM		 2818 int cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2819 int cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
a342031c 2820
a4be4187 2821 for_each_rtd_codec_dais(rtd, i, codec_dai) {
cfcb31c4 2822 if (dai_link->num_cpus == 1) {
c2233a26 2823 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
cfcb31c4 2824 } else if (dai_link->num_cpus == dai_link->num_codecs) {
c2233a26 2825 cpu_dai = asoc_rtd_to_cpu(rtd, i);
ac950278
BL		 2826 } else if (rtd->dai_link->num_codecs > rtd->dai_link->num_cpus) {
2827 int cpu_id;
2828
2829 if (!rtd->dai_link->codec_ch_maps) {
2830 dev_err(rtd->card->dev, "%s: no codec channel mapping table provided\n",
2831 __func__);
2832 return -EINVAL;
2833 }
2834
2835 cpu_id = rtd->dai_link->codec_ch_maps[i].connected_cpu_id;
2836 cpu_dai = asoc_rtd_to_cpu(rtd, cpu_id);
19bdcc7a
SN		 2837 } else {
2838 dev_err(rtd->card->dev,
ac950278
BL		 2839 "%s codec number %d < cpu number %d is not supported\n",
2840 __func__, rtd->dai_link->num_codecs,
2841 rtd->dai_link->num_cpus);
19bdcc7a
SN		 2842 return -EINVAL;
2843 }
2844
467fece8 2845 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
a4877a6f 2846 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
c3e9b6d6 2847 has_playback = 1;
467fece8 2848 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
a4877a6f 2849 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
c3e9b6d6 2850 has_capture = 1;
2e5894d7 2851 }
01d7584c
LG		 2852 }
2853
e1f653ce 2854 if (dai_link->playback_only)
c3e9b6d6 2855 has_capture = 0;
d6bead02 2856
e1f653ce 2857 if (dai_link->capture_only)
c3e9b6d6 2858 has_playback = 0;
d6bead02 2859
c3e9b6d6 2860 if (!has_playback && !has_capture) {
092830cf 2861 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
cfcb31c4 2862 dai_link->stream_name);
092830cf
KM		 2863
2864 return -EINVAL;
2865 }
2866
c3e9b6d6
KM		 2867 *playback = has_playback;
2868 *capture = has_capture;
2869
7fc6bebd
KM		 2870 return 0;
2871}
2872
2b39123b
KM		 2873static int soc_create_pcm(struct snd_pcm **pcm,
2874 struct snd_soc_pcm_runtime *rtd,
2875 int playback, int capture, int num)
7fc6bebd 2876{
7fc6bebd 2877 char new_name[64];
2b39123b 2878 int ret;
7fc6bebd 2879
01d7584c 2880 /* create the PCM */
7ddc7f91 2881 if (rtd->dai_link->c2c_params) {
a342031c
JB		 2882 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2883 rtd->dai_link->stream_name);
2884
2885 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2b39123b 2886 playback, capture, pcm);
a342031c 2887 } else if (rtd->dai_link->no_pcm) {
01d7584c
LG		 2888 snprintf(new_name, sizeof(new_name), "(%s)",
2889 rtd->dai_link->stream_name);
2890
2891 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2b39123b 2892 playback, capture, pcm);
01d7584c
LG		 2893 } else {
2894 if (rtd->dai_link->dynamic)
2895 snprintf(new_name, sizeof(new_name), "%s (*)",
2896 rtd->dai_link->stream_name);
2897 else
2898 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2e5894d7 2899 rtd->dai_link->stream_name,
6fb8944c 2900 soc_codec_dai_name(rtd), num);
01d7584c
LG		 2901
2902 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2b39123b 2903 capture, pcm);
01d7584c 2904 }
ddee627c 2905 if (ret < 0) {
799827a4
PLB		 2906 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2907 new_name, rtd->dai_link->name, ret);
ddee627c
LG		 2908 return ret;
2909 }
103d84a3 2910 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
ddee627c 2911
2b39123b
KM		 2912 return 0;
2913}
2914
2915/* create a new pcm */
2916int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2917{
2918 struct snd_soc_component *component;
2919 struct snd_pcm *pcm;
2920 int ret = 0, playback = 0, capture = 0;
2921 int i;
2922
2923 ret = soc_get_playback_capture(rtd, &playback, &capture);
2924 if (ret < 0)
2925 return ret;
2926
2927 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2928 if (ret < 0)
2929 return ret;
2930
ddee627c 2931 /* DAPM dai link stream work */
10d5d8cb
KM		 2932 /*
2933 * Currently nothing to do for c2c links
2934 * Since c2c links are internal nodes in the DAPM graph and
2935 * don't interface with the outside world or application layer
2936 * we don't have to do any special handling on close.
2937 */
7ddc7f91 2938 if (!rtd->dai_link->c2c_params)
83f94a2e 2939 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
ddee627c
LG		 2940
2941 rtd->pcm = pcm;
e04e7b8c 2942 pcm->nonatomic = rtd->dai_link->nonatomic;
ddee627c 2943 pcm->private_data = rtd;
4d45d944 2944 pcm->no_device_suspend = true;
01d7584c 2945
7ddc7f91 2946 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
01d7584c
LG		 2947 if (playback)
2948 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2949 if (capture)
2950 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2951 goto out;
2952 }
2953
2954 /* ASoC PCM operations */
2955 if (rtd->dai_link->dynamic) {
2956 rtd->ops.open = dpcm_fe_dai_open;
2957 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2958 rtd->ops.prepare = dpcm_fe_dai_prepare;
2959 rtd->ops.trigger = dpcm_fe_dai_trigger;
2960 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2961 rtd->ops.close = dpcm_fe_dai_close;
2962 rtd->ops.pointer = soc_pcm_pointer;
2963 } else {
2964 rtd->ops.open = soc_pcm_open;
2965 rtd->ops.hw_params = soc_pcm_hw_params;
2966 rtd->ops.prepare = soc_pcm_prepare;
2967 rtd->ops.trigger = soc_pcm_trigger;
2968 rtd->ops.hw_free = soc_pcm_hw_free;
2969 rtd->ops.close = soc_pcm_close;
2970 rtd->ops.pointer = soc_pcm_pointer;
2971 }
2972
613fb500 2973 for_each_rtd_components(rtd, i, component) {
2b544dd7 2974 const struct snd_soc_component_driver *drv = component->driver;
b8135864 2975
3b1c952c
TI		 2976 if (drv->ioctl)
2977 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
1e5ddb6b
TI		 2978 if (drv->sync_stop)
2979 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
e9067bb5 2980 if (drv->copy_user)
82d81f5c 2981 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
e9067bb5 2982 if (drv->page)
9c712e4f 2983 rtd->ops.page = snd_soc_pcm_component_page;
e9067bb5 2984 if (drv->mmap)
205875e1 2985 rtd->ops.mmap = snd_soc_pcm_component_mmap;
8bdfc045
SW		 2986 if (drv->ack)
2987 rtd->ops.ack = snd_soc_pcm_component_ack;
ddee627c
LG		 2988 }
2989
2990 if (playback)
01d7584c 2991 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
ddee627c
LG		 2992
2993 if (capture)
01d7584c 2994 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
ddee627c 2995
b2b2afbb 2996 ret = snd_soc_pcm_component_new(rtd);
60adbd8f 2997 if (ret < 0)
7484291e 2998 return ret;
01d7584c 2999out:
1d5cd525 3000 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
6fb8944c 3001 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
ddee627c
LG		 3002 return ret;
3003}
01d7584c
LG		 3004
3005/* is the current PCM operation for this FE ? */
3006int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3007{
3008 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3009 return 1;
3010 return 0;
3011}
3012EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3013
3014/* is the current PCM operation for this BE ? */
3015int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3016 struct snd_soc_pcm_runtime *be, int stream)
3017{
3018 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3019 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3020 be->dpcm[stream].runtime_update))
3021 return 1;
3022 return 0;
3023}
3024EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3025
3026/* get the substream for this BE */
3027struct snd_pcm_substream *
3028 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3029{
3030 return be->pcm->streams[stream].substream;
3031}
3032EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3033
085d22be
KM		 3034static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3035 struct snd_soc_pcm_runtime *be,
3036 int stream,
3037 const enum snd_soc_dpcm_state *states,
3038 int num_states)
01d7584c
LG		 3039{
3040 struct snd_soc_dpcm *dpcm;
3041 int state;
a9764869 3042 int ret = 1;
085d22be 3043 int i;
01d7584c 3044
d2e24d64 3045 for_each_dpcm_fe(be, stream, dpcm) {
01d7584c
LG		 3046
3047 if (dpcm->fe == fe)
3048 continue;
3049
3050 state = dpcm->fe->dpcm[stream].state;
085d22be
KM		 3051 for (i = 0; i < num_states; i++) {
3052 if (state == states[i]) {
3053 ret = 0;
3054 break;
3055 }
a9764869 3056 }
01d7584c
LG		 3057 }
3058
085d22be 3059 /* it's safe to do this BE DAI */
a9764869 3060 return ret;
01d7584c 3061}
085d22be
KM		 3062
3063/*
3064 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3065 * are not running, paused or suspended for the specified stream direction.
3066 */
3067int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3068 struct snd_soc_pcm_runtime *be, int stream)
3069{
3070 const enum snd_soc_dpcm_state state[] = {
3071 SND_SOC_DPCM_STATE_START,
3072 SND_SOC_DPCM_STATE_PAUSED,
3073 SND_SOC_DPCM_STATE_SUSPEND,
3074 };
3075
3076 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3077}
01d7584c
LG		 3078EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3079
3080/*
3081 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3082 * running, paused or suspended for the specified stream direction.
3083 */
3084int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3085 struct snd_soc_pcm_runtime *be, int stream)
3086{
085d22be
KM		 3087 const enum snd_soc_dpcm_state state[] = {
3088 SND_SOC_DPCM_STATE_START,
3089 SND_SOC_DPCM_STATE_PAUSED,
3090 SND_SOC_DPCM_STATE_SUSPEND,
3091 SND_SOC_DPCM_STATE_PREPARE,
3092 };
01d7584c 3093
085d22be 3094 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
01d7584c
LG		 3095}
3096EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
e123036b
RS		 3097
3098/*
3099 * We can only prepare a BE DAI if any of it's FE are not prepared,
3100 * running or paused for the specified stream direction.
3101 */
3102int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
3103 struct snd_soc_pcm_runtime *be, int stream)
3104{
3105 const enum snd_soc_dpcm_state state[] = {
3106 SND_SOC_DPCM_STATE_START,
3107 SND_SOC_DPCM_STATE_PAUSED,
3108 SND_SOC_DPCM_STATE_PREPARE,
3109 };
3110
3111 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3112}
3113EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);
Linux 6.x block layer and io_uring tree(s)