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>
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/soc-link.h>
28 #include <sound/initval.h>
29
30 #define DPCM_MAX_BE_USERS 8
31
soc_cpu_dai_name(struct snd_soc_pcm_runtime * rtd)32 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
33 {
34 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu";
35 }
soc_codec_dai_name(struct snd_soc_pcm_runtime * rtd)36 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
37 {
38 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec";
39 }
40
41 #ifdef CONFIG_DEBUG_FS
dpcm_state_string(enum snd_soc_dpcm_state state)42 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
43 {
44 switch (state) {
45 case SND_SOC_DPCM_STATE_NEW:
46 return "new";
47 case SND_SOC_DPCM_STATE_OPEN:
48 return "open";
49 case SND_SOC_DPCM_STATE_HW_PARAMS:
50 return "hw_params";
51 case SND_SOC_DPCM_STATE_PREPARE:
52 return "prepare";
53 case SND_SOC_DPCM_STATE_START:
54 return "start";
55 case SND_SOC_DPCM_STATE_STOP:
56 return "stop";
57 case SND_SOC_DPCM_STATE_SUSPEND:
58 return "suspend";
59 case SND_SOC_DPCM_STATE_PAUSED:
60 return "paused";
61 case SND_SOC_DPCM_STATE_HW_FREE:
62 return "hw_free";
63 case SND_SOC_DPCM_STATE_CLOSE:
64 return "close";
65 }
66
67 return "unknown";
68 }
69
dpcm_show_state(struct snd_soc_pcm_runtime * fe,int stream,char * buf,size_t size)70 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
71 int stream, char *buf, size_t size)
72 {
73 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
74 struct snd_soc_dpcm *dpcm;
75 ssize_t offset = 0;
76 unsigned long flags;
77
78 /* FE state */
79 offset += scnprintf(buf + offset, size - offset,
80 "[%s - %s]\n", fe->dai_link->name,
81 stream ? "Capture" : "Playback");
82
83 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
84 dpcm_state_string(fe->dpcm[stream].state));
85
86 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
87 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
88 offset += scnprintf(buf + offset, size - offset,
89 "Hardware Params: "
90 "Format = %s, Channels = %d, Rate = %d\n",
91 snd_pcm_format_name(params_format(params)),
92 params_channels(params),
93 params_rate(params));
94
95 /* BEs state */
96 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
97
98 if (list_empty(&fe->dpcm[stream].be_clients)) {
99 offset += scnprintf(buf + offset, size - offset,
100 " No active DSP links\n");
101 goto out;
102 }
103
104 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
105 for_each_dpcm_be(fe, stream, dpcm) {
106 struct snd_soc_pcm_runtime *be = dpcm->be;
107 params = &dpcm->hw_params;
108
109 offset += scnprintf(buf + offset, size - offset,
110 "- %s\n", be->dai_link->name);
111
112 offset += scnprintf(buf + offset, size - offset,
113 " State: %s\n",
114 dpcm_state_string(be->dpcm[stream].state));
115
116 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
117 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
118 offset += scnprintf(buf + offset, size - offset,
119 " Hardware Params: "
120 "Format = %s, Channels = %d, Rate = %d\n",
121 snd_pcm_format_name(params_format(params)),
122 params_channels(params),
123 params_rate(params));
124 }
125 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
126 out:
127 return offset;
128 }
129
dpcm_state_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)130 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
131 size_t count, loff_t *ppos)
132 {
133 struct snd_soc_pcm_runtime *fe = file->private_data;
134 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
135 int stream;
136 char *buf;
137
138 if (fe->num_cpus > 1) {
139 dev_err(fe->dev,
140 "%s doesn't support Multi CPU yet\n", __func__);
141 return -EINVAL;
142 }
143
144 buf = kmalloc(out_count, GFP_KERNEL);
145 if (!buf)
146 return -ENOMEM;
147
148 for_each_pcm_streams(stream)
149 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream))
150 offset += dpcm_show_state(fe, stream,
151 buf + offset,
152 out_count - offset);
153
154 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
155
156 kfree(buf);
157 return ret;
158 }
159
160 static const struct file_operations dpcm_state_fops = {
161 .open = simple_open,
162 .read = dpcm_state_read_file,
163 .llseek = default_llseek,
164 };
165
soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime * rtd)166 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
167 {
168 if (!rtd->dai_link->dynamic)
169 return;
170
171 if (!rtd->card->debugfs_card_root)
172 return;
173
174 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
175 rtd->card->debugfs_card_root);
176
177 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
178 rtd, &dpcm_state_fops);
179 }
180
dpcm_create_debugfs_state(struct snd_soc_dpcm * dpcm,int stream)181 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
182 {
183 char *name;
184
185 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
186 stream ? "capture" : "playback");
187 if (name) {
188 dpcm->debugfs_state = debugfs_create_dir(
189 name, dpcm->fe->debugfs_dpcm_root);
190 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
191 &dpcm->state);
192 kfree(name);
193 }
194 }
195
dpcm_remove_debugfs_state(struct snd_soc_dpcm * dpcm)196 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
197 {
198 debugfs_remove_recursive(dpcm->debugfs_state);
199 }
200
201 #else
dpcm_create_debugfs_state(struct snd_soc_dpcm * dpcm,int stream)202 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
203 int stream)
204 {
205 }
206
dpcm_remove_debugfs_state(struct snd_soc_dpcm * dpcm)207 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
208 {
209 }
210 #endif
211
212 /* Set FE's runtime_update state; the state is protected via PCM stream lock
213 * for avoiding the race with trigger callback.
214 * If the state is unset and a trigger is pending while the previous operation,
215 * process the pending trigger action here.
216 */
217 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
dpcm_set_fe_update_state(struct snd_soc_pcm_runtime * fe,int stream,enum snd_soc_dpcm_update state)218 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
219 int stream, enum snd_soc_dpcm_update state)
220 {
221 struct snd_pcm_substream *substream =
222 snd_soc_dpcm_get_substream(fe, stream);
223
224 snd_pcm_stream_lock_irq(substream);
225 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
226 dpcm_fe_dai_do_trigger(substream,
227 fe->dpcm[stream].trigger_pending - 1);
228 fe->dpcm[stream].trigger_pending = 0;
229 }
230 fe->dpcm[stream].runtime_update = state;
231 snd_pcm_stream_unlock_irq(substream);
232 }
233
dpcm_set_be_update_state(struct snd_soc_pcm_runtime * be,int stream,enum snd_soc_dpcm_update state)234 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
235 int stream, enum snd_soc_dpcm_update state)
236 {
237 be->dpcm[stream].runtime_update = state;
238 }
239
240 /**
241 * snd_soc_runtime_action() - Increment/Decrement active count for
242 * PCM runtime components
243 * @rtd: ASoC PCM runtime that is activated
244 * @stream: Direction of the PCM stream
245 * @action: Activate stream if 1. Deactivate if -1.
246 *
247 * Increments/Decrements the active count for all the DAIs and components
248 * attached to a PCM runtime.
249 * Should typically be called when a stream is opened.
250 *
251 * Must be called with the rtd->card->pcm_mutex being held
252 */
snd_soc_runtime_action(struct snd_soc_pcm_runtime * rtd,int stream,int action)253 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
254 int stream, int action)
255 {
256 struct snd_soc_dai *dai;
257 int i;
258
259 lockdep_assert_held(&rtd->card->pcm_mutex);
260
261 for_each_rtd_dais(rtd, i, dai)
262 snd_soc_dai_action(dai, stream, action);
263 }
264 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
265
266 /**
267 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
268 * @rtd: The ASoC PCM runtime that should be checked.
269 *
270 * This function checks whether the power down delay should be ignored for a
271 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
272 * been configured to ignore the delay, or if none of the components benefits
273 * from having the delay.
274 */
snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime * rtd)275 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
276 {
277 struct snd_soc_component *component;
278 bool ignore = true;
279 int i;
280
281 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
282 return true;
283
284 for_each_rtd_components(rtd, i, component)
285 ignore &= !component->driver->use_pmdown_time;
286
287 return ignore;
288 }
289
290 /**
291 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
292 * @substream: the pcm substream
293 * @hw: the hardware parameters
294 *
295 * Sets the substream runtime hardware parameters.
296 */
snd_soc_set_runtime_hwparams(struct snd_pcm_substream * substream,const struct snd_pcm_hardware * hw)297 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
298 const struct snd_pcm_hardware *hw)
299 {
300 substream->runtime->hw = *hw;
301
302 return 0;
303 }
304 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
305
306 /* DPCM stream event, send event to FE and all active BEs. */
dpcm_dapm_stream_event(struct snd_soc_pcm_runtime * fe,int dir,int event)307 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
308 int event)
309 {
310 struct snd_soc_dpcm *dpcm;
311
312 for_each_dpcm_be(fe, dir, dpcm) {
313
314 struct snd_soc_pcm_runtime *be = dpcm->be;
315
316 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
317 be->dai_link->name, event, dir);
318
319 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
320 (be->dpcm[dir].users >= 1))
321 continue;
322
323 snd_soc_dapm_stream_event(be, dir, event);
324 }
325
326 snd_soc_dapm_stream_event(fe, dir, event);
327
328 return 0;
329 }
330
soc_pcm_set_dai_params(struct snd_soc_dai * dai,struct snd_pcm_hw_params * params)331 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
332 struct snd_pcm_hw_params *params)
333 {
334 if (params) {
335 dai->rate = params_rate(params);
336 dai->channels = params_channels(params);
337 dai->sample_bits = snd_pcm_format_physical_width(params_format(params));
338 } else {
339 dai->rate = 0;
340 dai->channels = 0;
341 dai->sample_bits = 0;
342 }
343 }
344
soc_pcm_apply_symmetry(struct snd_pcm_substream * substream,struct snd_soc_dai * soc_dai)345 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
346 struct snd_soc_dai *soc_dai)
347 {
348 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
349 int ret;
350
351 if (!snd_soc_dai_active(soc_dai))
352 return 0;
353
354 #define __soc_pcm_apply_symmetry(name, NAME) \
355 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \
356 rtd->dai_link->symmetric_##name)) { \
357 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
358 #name, soc_dai->name); \
359 \
360 ret = snd_pcm_hw_constraint_single(substream->runtime, \
361 SNDRV_PCM_HW_PARAM_##NAME,\
362 soc_dai->name); \
363 if (ret < 0) { \
364 dev_err(soc_dai->dev, \
365 "ASoC: Unable to apply %s constraint: %d\n",\
366 #name, ret); \
367 return ret; \
368 } \
369 }
370
371 __soc_pcm_apply_symmetry(rate, RATE);
372 __soc_pcm_apply_symmetry(channels, CHANNELS);
373 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
374
375 return 0;
376 }
377
soc_pcm_params_symmetry(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)378 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
379 struct snd_pcm_hw_params *params)
380 {
381 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
382 struct snd_soc_dai d;
383 struct snd_soc_dai *dai;
384 struct snd_soc_dai *cpu_dai;
385 unsigned int symmetry, i;
386
387 d.name = __func__;
388 soc_pcm_set_dai_params(&d, params);
389
390 #define __soc_pcm_params_symmetry(xxx) \
391 symmetry = rtd->dai_link->symmetric_##xxx; \
392 for_each_rtd_dais(rtd, i, dai) \
393 symmetry |= dai->driver->symmetric_##xxx; \
394 \
395 if (symmetry) \
396 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
397 if (!snd_soc_dai_is_dummy(cpu_dai) && \
398 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \
399 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
400 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \
401 return -EINVAL; \
402 }
403
404 /* reject unmatched parameters when applying symmetry */
405 __soc_pcm_params_symmetry(rate);
406 __soc_pcm_params_symmetry(channels);
407 __soc_pcm_params_symmetry(sample_bits);
408
409 return 0;
410 }
411
soc_pcm_update_symmetry(struct snd_pcm_substream * substream)412 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
413 {
414 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
415 struct snd_soc_dai_link *link = rtd->dai_link;
416 struct snd_soc_dai *dai;
417 unsigned int symmetry, i;
418
419 symmetry = link->symmetric_rate ||
420 link->symmetric_channels ||
421 link->symmetric_sample_bits;
422
423 for_each_rtd_dais(rtd, i, dai)
424 symmetry = symmetry ||
425 dai->driver->symmetric_rate ||
426 dai->driver->symmetric_channels ||
427 dai->driver->symmetric_sample_bits;
428
429 if (symmetry)
430 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
431 }
432
soc_pcm_set_msb(struct snd_pcm_substream * substream,int bits)433 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
434 {
435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
436 int ret;
437
438 if (!bits)
439 return;
440
441 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
442 if (ret != 0)
443 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
444 bits, ret);
445 }
446
soc_pcm_apply_msb(struct snd_pcm_substream * substream)447 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
448 {
449 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
450 struct snd_soc_dai *cpu_dai;
451 struct snd_soc_dai *codec_dai;
452 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu;
453 int stream = substream->stream;
454 int i;
455 unsigned int bits = 0, cpu_bits = 0;
456
457 for_each_rtd_codec_dais(rtd, i, codec_dai) {
458 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
459
460 if (pcm_codec->sig_bits == 0) {
461 bits = 0;
462 break;
463 }
464 bits = max(pcm_codec->sig_bits, bits);
465 }
466
467 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
468 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
469
470 if (pcm_cpu->sig_bits == 0) {
471 cpu_bits = 0;
472 break;
473 }
474 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
475 }
476
477 soc_pcm_set_msb(substream, bits);
478 soc_pcm_set_msb(substream, cpu_bits);
479 }
480
soc_pcm_hw_init(struct snd_pcm_hardware * hw)481 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
482 {
483 hw->rates = UINT_MAX;
484 hw->rate_min = 0;
485 hw->rate_max = UINT_MAX;
486 hw->channels_min = 0;
487 hw->channels_max = UINT_MAX;
488 hw->formats = ULLONG_MAX;
489 }
490
soc_pcm_hw_update_rate(struct snd_pcm_hardware * hw,struct snd_soc_pcm_stream * p)491 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
492 struct snd_soc_pcm_stream *p)
493 {
494 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
495
496 /* setup hw->rate_min/max via hw->rates first */
497 snd_pcm_hw_limit_rates(hw);
498
499 /* update hw->rate_min/max by snd_soc_pcm_stream */
500 hw->rate_min = max(hw->rate_min, p->rate_min);
501 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
502 }
503
soc_pcm_hw_update_chan(struct snd_pcm_hardware * hw,struct snd_soc_pcm_stream * p)504 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
505 struct snd_soc_pcm_stream *p)
506 {
507 hw->channels_min = max(hw->channels_min, p->channels_min);
508 hw->channels_max = min(hw->channels_max, p->channels_max);
509 }
510
soc_pcm_hw_update_format(struct snd_pcm_hardware * hw,struct snd_soc_pcm_stream * p)511 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
512 struct snd_soc_pcm_stream *p)
513 {
514 hw->formats &= p->formats;
515 }
516
517 /**
518 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
519 * @rtd: ASoC PCM runtime
520 * @hw: PCM hardware parameters (output)
521 * @stream: Direction of the PCM stream
522 *
523 * Calculates the subset of stream parameters supported by all DAIs
524 * associated with the PCM stream.
525 */
snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hardware * hw,int stream)526 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
527 struct snd_pcm_hardware *hw, int stream)
528 {
529 struct snd_soc_dai *codec_dai;
530 struct snd_soc_dai *cpu_dai;
531 struct snd_soc_pcm_stream *codec_stream;
532 struct snd_soc_pcm_stream *cpu_stream;
533 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
534 int i;
535
536 soc_pcm_hw_init(hw);
537
538 /* first calculate min/max only for CPUs in the DAI link */
539 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
540
541 /*
542 * Skip CPUs which don't support the current stream type.
543 * Otherwise, since the rate, channel, and format values will
544 * zero in that case, we would have no usable settings left,
545 * causing the resulting setup to fail.
546 */
547 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
548 continue;
549
550 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
551
552 soc_pcm_hw_update_chan(hw, cpu_stream);
553 soc_pcm_hw_update_rate(hw, cpu_stream);
554 soc_pcm_hw_update_format(hw, cpu_stream);
555 }
556 cpu_chan_min = hw->channels_min;
557 cpu_chan_max = hw->channels_max;
558
559 /* second calculate min/max only for CODECs in the DAI link */
560 for_each_rtd_codec_dais(rtd, i, codec_dai) {
561
562 /*
563 * Skip CODECs which don't support the current stream type.
564 * Otherwise, since the rate, channel, and format values will
565 * zero in that case, we would have no usable settings left,
566 * causing the resulting setup to fail.
567 */
568 if (!snd_soc_dai_stream_valid(codec_dai, stream))
569 continue;
570
571 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
572
573 soc_pcm_hw_update_chan(hw, codec_stream);
574 soc_pcm_hw_update_rate(hw, codec_stream);
575 soc_pcm_hw_update_format(hw, codec_stream);
576 }
577
578 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
579 if (!hw->channels_min)
580 return -EINVAL;
581
582 /*
583 * chan min/max cannot be enforced if there are multiple CODEC DAIs
584 * connected to CPU DAI(s), use CPU DAI's directly and let
585 * channel allocation be fixed up later
586 */
587 if (rtd->num_codecs > 1) {
588 hw->channels_min = cpu_chan_min;
589 hw->channels_max = cpu_chan_max;
590 }
591
592 return 0;
593 }
594 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
595
soc_pcm_init_runtime_hw(struct snd_pcm_substream * substream)596 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
597 {
598 struct snd_pcm_hardware *hw = &substream->runtime->hw;
599 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
600 u64 formats = hw->formats;
601
602 /*
603 * At least one CPU and one CODEC should match. Otherwise, we should
604 * have bailed out on a higher level, since there would be no CPU or
605 * CODEC to support the transfer direction in that case.
606 */
607 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
608
609 if (formats)
610 hw->formats &= formats;
611 }
612
soc_pcm_components_open(struct snd_pcm_substream * substream)613 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
614 {
615 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
616 struct snd_soc_component *component;
617 int i, ret = 0;
618
619 for_each_rtd_components(rtd, i, component) {
620 ret = snd_soc_component_module_get_when_open(component, substream);
621 if (ret < 0)
622 break;
623
624 ret = snd_soc_component_open(component, substream);
625 if (ret < 0)
626 break;
627 }
628
629 return ret;
630 }
631
soc_pcm_components_close(struct snd_pcm_substream * substream,int rollback)632 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
633 int rollback)
634 {
635 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
636 struct snd_soc_component *component;
637 int i, r, ret = 0;
638
639 for_each_rtd_components(rtd, i, component) {
640 r = snd_soc_component_close(component, substream, rollback);
641 if (r < 0)
642 ret = r; /* use last ret */
643
644 snd_soc_component_module_put_when_close(component, substream, rollback);
645 }
646
647 return ret;
648 }
649
soc_pcm_clean(struct snd_pcm_substream * substream,int rollback)650 static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback)
651 {
652 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
653 struct snd_soc_component *component;
654 struct snd_soc_dai *dai;
655 int i;
656
657 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
658
659 if (!rollback)
660 snd_soc_runtime_deactivate(rtd, substream->stream);
661
662 for_each_rtd_dais(rtd, i, dai)
663 snd_soc_dai_shutdown(dai, substream, rollback);
664
665 snd_soc_link_shutdown(substream, rollback);
666
667 soc_pcm_components_close(substream, rollback);
668
669
670 mutex_unlock(&rtd->card->pcm_mutex);
671
672 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
673
674 for_each_rtd_components(rtd, i, component)
675 if (!snd_soc_component_active(component))
676 pinctrl_pm_select_sleep_state(component->dev);
677
678 return 0;
679 }
680
681 /*
682 * Called by ALSA when a PCM substream is closed. Private data can be
683 * freed here. The cpu DAI, codec DAI, machine and components are also
684 * shutdown.
685 */
soc_pcm_close(struct snd_pcm_substream * substream)686 static int soc_pcm_close(struct snd_pcm_substream *substream)
687 {
688 return soc_pcm_clean(substream, 0);
689 }
690
soc_hw_sanity_check(struct snd_pcm_substream * substream)691 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
692 {
693 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
694 struct snd_pcm_hardware *hw = &substream->runtime->hw;
695 const char *name_cpu = soc_cpu_dai_name(rtd);
696 const char *name_codec = soc_codec_dai_name(rtd);
697 const char *err_msg;
698 struct device *dev = rtd->dev;
699
700 err_msg = "rates";
701 if (!hw->rates)
702 goto config_err;
703
704 err_msg = "formats";
705 if (!hw->formats)
706 goto config_err;
707
708 err_msg = "channels";
709 if (!hw->channels_min || !hw->channels_max ||
710 hw->channels_min > hw->channels_max)
711 goto config_err;
712
713 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
714 name_cpu);
715 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
716 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
717 hw->channels_max);
718 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
719 hw->rate_max);
720
721 return 0;
722
723 config_err:
724 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
725 name_codec, name_cpu, err_msg);
726 return -EINVAL;
727 }
728
729 /*
730 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
731 * then initialized and any private data can be allocated. This also calls
732 * startup for the cpu DAI, component, machine and codec DAI.
733 */
soc_pcm_open(struct snd_pcm_substream * substream)734 static int soc_pcm_open(struct snd_pcm_substream *substream)
735 {
736 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
737 struct snd_soc_component *component;
738 struct snd_soc_dai *dai;
739 int i, ret = 0;
740
741 for_each_rtd_components(rtd, i, component)
742 pinctrl_pm_select_default_state(component->dev);
743
744 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
745 if (ret < 0)
746 goto pm_err;
747
748 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
749
750 ret = soc_pcm_components_open(substream);
751 if (ret < 0)
752 goto err;
753
754 ret = snd_soc_link_startup(substream);
755 if (ret < 0)
756 goto err;
757
758 /* startup the audio subsystem */
759 for_each_rtd_dais(rtd, i, dai) {
760 ret = snd_soc_dai_startup(dai, substream);
761 if (ret < 0)
762 goto err;
763
764 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
765 dai->tx_mask = 0;
766 else
767 dai->rx_mask = 0;
768 }
769
770 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
771 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
772 goto dynamic;
773
774 /* Check that the codec and cpu DAIs are compatible */
775 soc_pcm_init_runtime_hw(substream);
776
777 soc_pcm_update_symmetry(substream);
778
779 ret = soc_hw_sanity_check(substream);
780 if (ret < 0)
781 goto err;
782
783 soc_pcm_apply_msb(substream);
784
785 /* Symmetry only applies if we've already got an active stream. */
786 for_each_rtd_dais(rtd, i, dai) {
787 ret = soc_pcm_apply_symmetry(substream, dai);
788 if (ret != 0)
789 goto err;
790 }
791 dynamic:
792 snd_soc_runtime_activate(rtd, substream->stream);
793 ret = 0;
794 err:
795 mutex_unlock(&rtd->card->pcm_mutex);
796 pm_err:
797 if (ret < 0) {
798 soc_pcm_clean(substream, 1);
799 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret);
800 }
801
802 return ret;
803 }
804
codec2codec_close_delayed_work(struct snd_soc_pcm_runtime * rtd)805 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
806 {
807 /*
808 * Currently nothing to do for c2c links
809 * Since c2c links are internal nodes in the DAPM graph and
810 * don't interface with the outside world or application layer
811 * we don't have to do any special handling on close.
812 */
813 }
814
815 /*
816 * Called by ALSA when the PCM substream is prepared, can set format, sample
817 * rate, etc. This function is non atomic and can be called multiple times,
818 * it can refer to the runtime info.
819 */
soc_pcm_prepare(struct snd_pcm_substream * substream)820 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
821 {
822 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
823 struct snd_soc_dai *dai;
824 int i, ret = 0;
825
826 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
827
828 ret = snd_soc_link_prepare(substream);
829 if (ret < 0)
830 goto out;
831
832 ret = snd_soc_pcm_component_prepare(substream);
833 if (ret < 0)
834 goto out;
835
836 ret = snd_soc_pcm_dai_prepare(substream);
837 if (ret < 0)
838 goto out;
839
840 /* cancel any delayed stream shutdown that is pending */
841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
842 rtd->pop_wait) {
843 rtd->pop_wait = 0;
844 cancel_delayed_work(&rtd->delayed_work);
845 }
846
847 snd_soc_dapm_stream_event(rtd, substream->stream,
848 SND_SOC_DAPM_STREAM_START);
849
850 for_each_rtd_dais(rtd, i, dai)
851 snd_soc_dai_digital_mute(dai, 0, substream->stream);
852
853 out:
854 mutex_unlock(&rtd->card->pcm_mutex);
855
856 if (ret < 0)
857 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
858
859 return ret;
860 }
861
soc_pcm_codec_params_fixup(struct snd_pcm_hw_params * params,unsigned int mask)862 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
863 unsigned int mask)
864 {
865 struct snd_interval *interval;
866 int channels = hweight_long(mask);
867
868 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
869 interval->min = channels;
870 interval->max = channels;
871 }
872
soc_pcm_hw_clean(struct snd_pcm_substream * substream,int rollback)873 static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback)
874 {
875 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
876 struct snd_soc_dai *dai;
877 int i;
878
879 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
880
881 /* clear the corresponding DAIs parameters when going to be inactive */
882 for_each_rtd_dais(rtd, i, dai) {
883 int active = snd_soc_dai_stream_active(dai, substream->stream);
884
885 if (snd_soc_dai_active(dai) == 1)
886 soc_pcm_set_dai_params(dai, NULL);
887
888 if (active == 1)
889 snd_soc_dai_digital_mute(dai, 1, substream->stream);
890 }
891
892 /* run the stream event */
893 snd_soc_dapm_stream_stop(rtd, substream->stream);
894
895 /* free any machine hw params */
896 snd_soc_link_hw_free(substream, rollback);
897
898 /* free any component resources */
899 snd_soc_pcm_component_hw_free(substream, rollback);
900
901 /* now free hw params for the DAIs */
902 for_each_rtd_dais(rtd, i, dai) {
903 if (!snd_soc_dai_stream_valid(dai, substream->stream))
904 continue;
905
906 snd_soc_dai_hw_free(dai, substream, rollback);
907 }
908
909 mutex_unlock(&rtd->card->pcm_mutex);
910 return 0;
911 }
912
913 /*
914 * Frees resources allocated by hw_params, can be called multiple times
915 */
soc_pcm_hw_free(struct snd_pcm_substream * substream)916 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
917 {
918 return soc_pcm_hw_clean(substream, 0);
919 }
920
921 /*
922 * Called by ALSA when the hardware params are set by application. This
923 * function can also be called multiple times and can allocate buffers
924 * (using snd_pcm_lib_* ). It's non-atomic.
925 */
soc_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)926 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
927 struct snd_pcm_hw_params *params)
928 {
929 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
930 struct snd_soc_dai *cpu_dai;
931 struct snd_soc_dai *codec_dai;
932 int i, ret = 0;
933
934 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
935
936 ret = soc_pcm_params_symmetry(substream, params);
937 if (ret)
938 goto out;
939
940 ret = snd_soc_link_hw_params(substream, params);
941 if (ret < 0)
942 goto out;
943
944 for_each_rtd_codec_dais(rtd, i, codec_dai) {
945 struct snd_pcm_hw_params codec_params;
946
947 /*
948 * Skip CODECs which don't support the current stream type,
949 * the idea being that if a CODEC is not used for the currently
950 * set up transfer direction, it should not need to be
951 * configured, especially since the configuration used might
952 * not even be supported by that CODEC. There may be cases
953 * however where a CODEC needs to be set up although it is
954 * actually not being used for the transfer, e.g. if a
955 * capture-only CODEC is acting as an LRCLK and/or BCLK master
956 * for the DAI link including a playback-only CODEC.
957 * If this becomes necessary, we will have to augment the
958 * machine driver setup with information on how to act, so
959 * we can do the right thing here.
960 */
961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
962 continue;
963
964 /* copy params for each codec */
965 codec_params = *params;
966
967 /* fixup params based on TDM slot masks */
968 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
969 codec_dai->tx_mask)
970 soc_pcm_codec_params_fixup(&codec_params,
971 codec_dai->tx_mask);
972
973 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
974 codec_dai->rx_mask)
975 soc_pcm_codec_params_fixup(&codec_params,
976 codec_dai->rx_mask);
977
978 ret = snd_soc_dai_hw_params(codec_dai, substream,
979 &codec_params);
980 if(ret < 0)
981 goto out;
982
983 soc_pcm_set_dai_params(codec_dai, &codec_params);
984 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
985 }
986
987 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
988 /*
989 * Skip CPUs which don't support the current stream
990 * type. See soc_pcm_init_runtime_hw() for more details
991 */
992 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
993 continue;
994
995 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
996 if (ret < 0)
997 goto out;
998
999 /* store the parameters for each DAI */
1000 soc_pcm_set_dai_params(cpu_dai, params);
1001 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1002 }
1003
1004 ret = snd_soc_pcm_component_hw_params(substream, params);
1005 out:
1006 mutex_unlock(&rtd->card->pcm_mutex);
1007
1008 if (ret < 0) {
1009 soc_pcm_hw_clean(substream, 1);
1010 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
1011 }
1012
1013 return ret;
1014 }
1015
soc_pcm_trigger(struct snd_pcm_substream * substream,int cmd)1016 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1017 {
1018 int ret = -EINVAL, _ret = 0;
1019 int rollback = 0;
1020
1021 switch (cmd) {
1022 case SNDRV_PCM_TRIGGER_START:
1023 case SNDRV_PCM_TRIGGER_RESUME:
1024 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1025 ret = snd_soc_link_trigger(substream, cmd, 0);
1026 if (ret < 0)
1027 goto start_err;
1028
1029 ret = snd_soc_pcm_component_trigger(substream, cmd, 0);
1030 if (ret < 0)
1031 goto start_err;
1032
1033 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0);
1034 start_err:
1035 if (ret < 0)
1036 rollback = 1;
1037 }
1038
1039 if (rollback) {
1040 _ret = ret;
1041 switch (cmd) {
1042 case SNDRV_PCM_TRIGGER_START:
1043 cmd = SNDRV_PCM_TRIGGER_STOP;
1044 break;
1045 case SNDRV_PCM_TRIGGER_RESUME:
1046 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1047 break;
1048 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1049 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1050 break;
1051 }
1052 }
1053
1054 switch (cmd) {
1055 case SNDRV_PCM_TRIGGER_STOP:
1056 case SNDRV_PCM_TRIGGER_SUSPEND:
1057 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1058 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
1059 if (ret < 0)
1060 break;
1061
1062 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
1063 if (ret < 0)
1064 break;
1065
1066 ret = snd_soc_link_trigger(substream, cmd, rollback);
1067 break;
1068 }
1069
1070 if (_ret)
1071 ret = _ret;
1072
1073 return ret;
1074 }
1075
1076 /*
1077 * soc level wrapper for pointer callback
1078 * If cpu_dai, codec_dai, component driver has the delay callback, then
1079 * the runtime->delay will be updated accordingly.
1080 */
soc_pcm_pointer(struct snd_pcm_substream * substream)1081 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1082 {
1083 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
1084 struct snd_soc_dai *cpu_dai;
1085 struct snd_soc_dai *codec_dai;
1086 struct snd_pcm_runtime *runtime = substream->runtime;
1087 snd_pcm_uframes_t offset = 0;
1088 snd_pcm_sframes_t delay = 0;
1089 snd_pcm_sframes_t codec_delay = 0;
1090 snd_pcm_sframes_t cpu_delay = 0;
1091 int i;
1092
1093 /* clearing the previous total delay */
1094 runtime->delay = 0;
1095
1096 offset = snd_soc_pcm_component_pointer(substream);
1097
1098 /* base delay if assigned in pointer callback */
1099 delay = runtime->delay;
1100
1101 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1102 cpu_delay = max(cpu_delay,
1103 snd_soc_dai_delay(cpu_dai, substream));
1104 }
1105 delay += cpu_delay;
1106
1107 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1108 codec_delay = max(codec_delay,
1109 snd_soc_dai_delay(codec_dai, substream));
1110 }
1111 delay += codec_delay;
1112
1113 runtime->delay = delay;
1114
1115 return offset;
1116 }
1117
1118 /* connect a FE and BE */
dpcm_be_connect(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1119 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1120 struct snd_soc_pcm_runtime *be, int stream)
1121 {
1122 struct snd_soc_dpcm *dpcm;
1123 unsigned long flags;
1124
1125 /* only add new dpcms */
1126 for_each_dpcm_be(fe, stream, dpcm) {
1127 if (dpcm->be == be && dpcm->fe == fe)
1128 return 0;
1129 }
1130
1131 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1132 if (!dpcm)
1133 return -ENOMEM;
1134
1135 dpcm->be = be;
1136 dpcm->fe = fe;
1137 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1138 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1139 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1140 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1141 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1142 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1143
1144 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1145 stream ? "capture" : "playback", fe->dai_link->name,
1146 stream ? "<-" : "->", be->dai_link->name);
1147
1148 dpcm_create_debugfs_state(dpcm, stream);
1149
1150 return 1;
1151 }
1152
1153 /* reparent a BE onto another FE */
dpcm_be_reparent(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1154 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1155 struct snd_soc_pcm_runtime *be, int stream)
1156 {
1157 struct snd_soc_dpcm *dpcm;
1158 struct snd_pcm_substream *fe_substream, *be_substream;
1159
1160 /* reparent if BE is connected to other FEs */
1161 if (!be->dpcm[stream].users)
1162 return;
1163
1164 be_substream = snd_soc_dpcm_get_substream(be, stream);
1165
1166 for_each_dpcm_fe(be, stream, dpcm) {
1167 if (dpcm->fe == fe)
1168 continue;
1169
1170 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1171 stream ? "capture" : "playback",
1172 dpcm->fe->dai_link->name,
1173 stream ? "<-" : "->", dpcm->be->dai_link->name);
1174
1175 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1176 be_substream->runtime = fe_substream->runtime;
1177 break;
1178 }
1179 }
1180
1181 /* disconnect a BE and FE */
dpcm_be_disconnect(struct snd_soc_pcm_runtime * fe,int stream)1182 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1183 {
1184 struct snd_soc_dpcm *dpcm, *d;
1185 unsigned long flags;
1186
1187 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1188 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1189 stream ? "capture" : "playback",
1190 dpcm->be->dai_link->name);
1191
1192 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1193 continue;
1194
1195 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1196 stream ? "capture" : "playback", fe->dai_link->name,
1197 stream ? "<-" : "->", dpcm->be->dai_link->name);
1198
1199 /* BEs still alive need new FE */
1200 dpcm_be_reparent(fe, dpcm->be, stream);
1201
1202 dpcm_remove_debugfs_state(dpcm);
1203
1204 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1205 list_del(&dpcm->list_be);
1206 list_del(&dpcm->list_fe);
1207 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1208 kfree(dpcm);
1209 }
1210 }
1211
1212 /* get BE for DAI widget and stream */
dpcm_get_be(struct snd_soc_card * card,struct snd_soc_dapm_widget * widget,int stream)1213 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1214 struct snd_soc_dapm_widget *widget, int stream)
1215 {
1216 struct snd_soc_pcm_runtime *be;
1217 struct snd_soc_dapm_widget *w;
1218 struct snd_soc_dai *dai;
1219 int i;
1220
1221 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1222
1223 for_each_card_rtds(card, be) {
1224
1225 if (!be->dai_link->no_pcm)
1226 continue;
1227
1228 for_each_rtd_dais(be, i, dai) {
1229 w = snd_soc_dai_get_widget(dai, stream);
1230
1231 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1232 w ? w->name : "(not set)");
1233
1234 if (w == widget)
1235 return be;
1236 }
1237 }
1238
1239 /* Widget provided is not a BE */
1240 return NULL;
1241 }
1242
widget_in_list(struct snd_soc_dapm_widget_list * list,struct snd_soc_dapm_widget * widget)1243 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1244 struct snd_soc_dapm_widget *widget)
1245 {
1246 struct snd_soc_dapm_widget *w;
1247 int i;
1248
1249 for_each_dapm_widgets(list, i, w)
1250 if (widget == w)
1251 return 1;
1252
1253 return 0;
1254 }
1255
dpcm_end_walk_at_be(struct snd_soc_dapm_widget * widget,enum snd_soc_dapm_direction dir)1256 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1257 enum snd_soc_dapm_direction dir)
1258 {
1259 struct snd_soc_card *card = widget->dapm->card;
1260 struct snd_soc_pcm_runtime *rtd;
1261 int stream;
1262
1263 /* adjust dir to stream */
1264 if (dir == SND_SOC_DAPM_DIR_OUT)
1265 stream = SNDRV_PCM_STREAM_PLAYBACK;
1266 else
1267 stream = SNDRV_PCM_STREAM_CAPTURE;
1268
1269 rtd = dpcm_get_be(card, widget, stream);
1270 if (rtd)
1271 return true;
1272
1273 return false;
1274 }
1275
dpcm_path_get(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list)1276 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1277 int stream, struct snd_soc_dapm_widget_list **list)
1278 {
1279 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0);
1280 int paths;
1281
1282 if (fe->num_cpus > 1) {
1283 dev_err(fe->dev,
1284 "%s doesn't support Multi CPU yet\n", __func__);
1285 return -EINVAL;
1286 }
1287
1288 /* get number of valid DAI paths and their widgets */
1289 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1290 fe->card->component_chaining ?
1291 NULL : dpcm_end_walk_at_be);
1292
1293 if (paths > 0)
1294 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1295 stream ? "capture" : "playback");
1296 else if (paths == 0)
1297 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1298 stream ? "capture" : "playback");
1299
1300 return paths;
1301 }
1302
dpcm_path_put(struct snd_soc_dapm_widget_list ** list)1303 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1304 {
1305 snd_soc_dapm_dai_free_widgets(list);
1306 }
1307
dpcm_be_is_active(struct snd_soc_dpcm * dpcm,int stream,struct snd_soc_dapm_widget_list * list)1308 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1309 struct snd_soc_dapm_widget_list *list)
1310 {
1311 struct snd_soc_dapm_widget *widget;
1312 struct snd_soc_dai *dai;
1313 unsigned int i;
1314
1315 /* is there a valid DAI widget for this BE */
1316 for_each_rtd_dais(dpcm->be, i, dai) {
1317 widget = snd_soc_dai_get_widget(dai, stream);
1318
1319 /*
1320 * The BE is pruned only if none of the dai
1321 * widgets are in the active list.
1322 */
1323 if (widget && widget_in_list(list, widget))
1324 return true;
1325 }
1326
1327 return false;
1328 }
1329
dpcm_prune_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1330 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1331 struct snd_soc_dapm_widget_list **list_)
1332 {
1333 struct snd_soc_dpcm *dpcm;
1334 int prune = 0;
1335
1336 /* Destroy any old FE <--> BE connections */
1337 for_each_dpcm_be(fe, stream, dpcm) {
1338 if (dpcm_be_is_active(dpcm, stream, *list_))
1339 continue;
1340
1341 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1342 stream ? "capture" : "playback",
1343 dpcm->be->dai_link->name, fe->dai_link->name);
1344 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1345 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1346 prune++;
1347 }
1348
1349 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1350 return prune;
1351 }
1352
dpcm_add_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1353 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1354 struct snd_soc_dapm_widget_list **list_)
1355 {
1356 struct snd_soc_card *card = fe->card;
1357 struct snd_soc_dapm_widget_list *list = *list_;
1358 struct snd_soc_pcm_runtime *be;
1359 struct snd_soc_dapm_widget *widget;
1360 int i, new = 0, err;
1361
1362 /* Create any new FE <--> BE connections */
1363 for_each_dapm_widgets(list, i, widget) {
1364
1365 switch (widget->id) {
1366 case snd_soc_dapm_dai_in:
1367 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1368 continue;
1369 break;
1370 case snd_soc_dapm_dai_out:
1371 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1372 continue;
1373 break;
1374 default:
1375 continue;
1376 }
1377
1378 /* is there a valid BE rtd for this widget */
1379 be = dpcm_get_be(card, widget, stream);
1380 if (!be) {
1381 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1382 widget->name);
1383 continue;
1384 }
1385
1386 /* don't connect if FE is not running */
1387 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1388 continue;
1389
1390 /* newly connected FE and BE */
1391 err = dpcm_be_connect(fe, be, stream);
1392 if (err < 0) {
1393 dev_err(fe->dev, "ASoC: can't connect %s\n",
1394 widget->name);
1395 break;
1396 } else if (err == 0) /* already connected */
1397 continue;
1398
1399 /* new */
1400 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1401 new++;
1402 }
1403
1404 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1405 return new;
1406 }
1407
1408 /*
1409 * Find the corresponding BE DAIs that source or sink audio to this
1410 * FE substream.
1411 */
dpcm_process_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list,int new)1412 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1413 int stream, struct snd_soc_dapm_widget_list **list, int new)
1414 {
1415 if (new)
1416 return dpcm_add_paths(fe, stream, list);
1417 else
1418 return dpcm_prune_paths(fe, stream, list);
1419 }
1420
dpcm_clear_pending_state(struct snd_soc_pcm_runtime * fe,int stream)1421 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1422 {
1423 struct snd_soc_dpcm *dpcm;
1424 unsigned long flags;
1425
1426 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1427 for_each_dpcm_be(fe, stream, dpcm)
1428 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1429 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1430 }
1431
dpcm_be_dai_stop(struct snd_soc_pcm_runtime * fe,int stream,int do_hw_free,struct snd_soc_dpcm * last)1432 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1433 int do_hw_free, struct snd_soc_dpcm *last)
1434 {
1435 struct snd_soc_dpcm *dpcm;
1436
1437 /* disable any enabled and non active backends */
1438 for_each_dpcm_be(fe, stream, dpcm) {
1439 struct snd_soc_pcm_runtime *be = dpcm->be;
1440 struct snd_pcm_substream *be_substream =
1441 snd_soc_dpcm_get_substream(be, stream);
1442
1443 if (dpcm == last)
1444 return;
1445
1446 /* is this op for this BE ? */
1447 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1448 continue;
1449
1450 if (be->dpcm[stream].users == 0) {
1451 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1452 stream ? "capture" : "playback",
1453 be->dpcm[stream].state);
1454 continue;
1455 }
1456
1457 if (--be->dpcm[stream].users != 0)
1458 continue;
1459
1460 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1461 if (!do_hw_free)
1462 continue;
1463
1464 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1465 soc_pcm_hw_free(be_substream);
1466 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1467 }
1468 }
1469
1470 soc_pcm_close(be_substream);
1471 be_substream->runtime = NULL;
1472 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1473 }
1474 }
1475
dpcm_be_dai_startup(struct snd_soc_pcm_runtime * fe,int stream)1476 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1477 {
1478 struct snd_soc_pcm_runtime *be;
1479 struct snd_soc_dpcm *dpcm;
1480 int err, count = 0;
1481
1482 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1483 for_each_dpcm_be(fe, stream, dpcm) {
1484 struct snd_pcm_substream *be_substream;
1485
1486 be = dpcm->be;
1487 be_substream = snd_soc_dpcm_get_substream(be, stream);
1488
1489 if (!be_substream) {
1490 dev_err(be->dev, "ASoC: no backend %s stream\n",
1491 stream ? "capture" : "playback");
1492 continue;
1493 }
1494
1495 /* is this op for this BE ? */
1496 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1497 continue;
1498
1499 /* first time the dpcm is open ? */
1500 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1501 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1502 stream ? "capture" : "playback",
1503 be->dpcm[stream].state);
1504 continue;
1505 }
1506
1507 if (be->dpcm[stream].users++ != 0)
1508 continue;
1509
1510 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1511 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1512 continue;
1513
1514 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1515 stream ? "capture" : "playback", be->dai_link->name);
1516
1517 be_substream->runtime = be->dpcm[stream].runtime;
1518 err = soc_pcm_open(be_substream);
1519 if (err < 0) {
1520 be->dpcm[stream].users--;
1521 if (be->dpcm[stream].users < 0)
1522 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1523 stream ? "capture" : "playback",
1524 be->dpcm[stream].state);
1525
1526 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1527 goto unwind;
1528 }
1529
1530 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1531 count++;
1532 }
1533
1534 return count;
1535
1536 unwind:
1537 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1538
1539 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n",
1540 __func__, be->dai_link->name, err);
1541
1542 return err;
1543 }
1544
dpcm_runtime_setup_fe(struct snd_pcm_substream * substream)1545 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1546 {
1547 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1548 struct snd_pcm_runtime *runtime = substream->runtime;
1549 struct snd_pcm_hardware *hw = &runtime->hw;
1550 struct snd_soc_dai *dai;
1551 int stream = substream->stream;
1552 int i;
1553
1554 soc_pcm_hw_init(hw);
1555
1556 for_each_rtd_cpu_dais(fe, i, dai) {
1557 struct snd_soc_pcm_stream *cpu_stream;
1558
1559 /*
1560 * Skip CPUs which don't support the current stream
1561 * type. See soc_pcm_init_runtime_hw() for more details
1562 */
1563 if (!snd_soc_dai_stream_valid(dai, stream))
1564 continue;
1565
1566 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1567
1568 soc_pcm_hw_update_rate(hw, cpu_stream);
1569 soc_pcm_hw_update_chan(hw, cpu_stream);
1570 soc_pcm_hw_update_format(hw, cpu_stream);
1571 }
1572
1573 }
1574
dpcm_runtime_setup_be_format(struct snd_pcm_substream * substream)1575 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1576 {
1577 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1578 struct snd_pcm_runtime *runtime = substream->runtime;
1579 struct snd_pcm_hardware *hw = &runtime->hw;
1580 struct snd_soc_dpcm *dpcm;
1581 struct snd_soc_dai *dai;
1582 int stream = substream->stream;
1583
1584 if (!fe->dai_link->dpcm_merged_format)
1585 return;
1586
1587 /*
1588 * It returns merged BE codec format
1589 * if FE want to use it (= dpcm_merged_format)
1590 */
1591
1592 for_each_dpcm_be(fe, stream, dpcm) {
1593 struct snd_soc_pcm_runtime *be = dpcm->be;
1594 struct snd_soc_pcm_stream *codec_stream;
1595 int i;
1596
1597 for_each_rtd_codec_dais(be, i, dai) {
1598 /*
1599 * Skip CODECs which don't support the current stream
1600 * type. See soc_pcm_init_runtime_hw() for more details
1601 */
1602 if (!snd_soc_dai_stream_valid(dai, stream))
1603 continue;
1604
1605 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1606
1607 soc_pcm_hw_update_format(hw, codec_stream);
1608 }
1609 }
1610 }
1611
dpcm_runtime_setup_be_chan(struct snd_pcm_substream * substream)1612 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1613 {
1614 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1615 struct snd_pcm_runtime *runtime = substream->runtime;
1616 struct snd_pcm_hardware *hw = &runtime->hw;
1617 struct snd_soc_dpcm *dpcm;
1618 int stream = substream->stream;
1619
1620 if (!fe->dai_link->dpcm_merged_chan)
1621 return;
1622
1623 /*
1624 * It returns merged BE codec channel;
1625 * if FE want to use it (= dpcm_merged_chan)
1626 */
1627
1628 for_each_dpcm_be(fe, stream, dpcm) {
1629 struct snd_soc_pcm_runtime *be = dpcm->be;
1630 struct snd_soc_pcm_stream *codec_stream;
1631 struct snd_soc_pcm_stream *cpu_stream;
1632 struct snd_soc_dai *dai;
1633 int i;
1634
1635 for_each_rtd_cpu_dais(be, i, dai) {
1636 /*
1637 * Skip CPUs which don't support the current stream
1638 * type. See soc_pcm_init_runtime_hw() for more details
1639 */
1640 if (!snd_soc_dai_stream_valid(dai, stream))
1641 continue;
1642
1643 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1644
1645 soc_pcm_hw_update_chan(hw, cpu_stream);
1646 }
1647
1648 /*
1649 * chan min/max cannot be enforced if there are multiple CODEC
1650 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1651 */
1652 if (be->num_codecs == 1) {
1653 codec_stream = snd_soc_dai_get_pcm_stream(asoc_rtd_to_codec(be, 0), stream);
1654
1655 soc_pcm_hw_update_chan(hw, codec_stream);
1656 }
1657 }
1658 }
1659
dpcm_runtime_setup_be_rate(struct snd_pcm_substream * substream)1660 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1661 {
1662 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1663 struct snd_pcm_runtime *runtime = substream->runtime;
1664 struct snd_pcm_hardware *hw = &runtime->hw;
1665 struct snd_soc_dpcm *dpcm;
1666 int stream = substream->stream;
1667
1668 if (!fe->dai_link->dpcm_merged_rate)
1669 return;
1670
1671 /*
1672 * It returns merged BE codec channel;
1673 * if FE want to use it (= dpcm_merged_chan)
1674 */
1675
1676 for_each_dpcm_be(fe, stream, dpcm) {
1677 struct snd_soc_pcm_runtime *be = dpcm->be;
1678 struct snd_soc_pcm_stream *pcm;
1679 struct snd_soc_dai *dai;
1680 int i;
1681
1682 for_each_rtd_dais(be, i, dai) {
1683 /*
1684 * Skip DAIs which don't support the current stream
1685 * type. See soc_pcm_init_runtime_hw() for more details
1686 */
1687 if (!snd_soc_dai_stream_valid(dai, stream))
1688 continue;
1689
1690 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1691
1692 soc_pcm_hw_update_rate(hw, pcm);
1693 }
1694 }
1695 }
1696
dpcm_apply_symmetry(struct snd_pcm_substream * fe_substream,int stream)1697 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1698 int stream)
1699 {
1700 struct snd_soc_dpcm *dpcm;
1701 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1702 struct snd_soc_dai *fe_cpu_dai;
1703 int err;
1704 int i;
1705
1706 /* apply symmetry for FE */
1707 soc_pcm_update_symmetry(fe_substream);
1708
1709 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1710 /* Symmetry only applies if we've got an active stream. */
1711 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1712 if (err < 0)
1713 goto error;
1714 }
1715
1716 /* apply symmetry for BE */
1717 for_each_dpcm_be(fe, stream, dpcm) {
1718 struct snd_soc_pcm_runtime *be = dpcm->be;
1719 struct snd_pcm_substream *be_substream =
1720 snd_soc_dpcm_get_substream(be, stream);
1721 struct snd_soc_pcm_runtime *rtd;
1722 struct snd_soc_dai *dai;
1723
1724 /* A backend may not have the requested substream */
1725 if (!be_substream)
1726 continue;
1727
1728 rtd = asoc_substream_to_rtd(be_substream);
1729 if (rtd->dai_link->be_hw_params_fixup)
1730 continue;
1731
1732 soc_pcm_update_symmetry(be_substream);
1733
1734 /* Symmetry only applies if we've got an active stream. */
1735 for_each_rtd_dais(rtd, i, dai) {
1736 err = soc_pcm_apply_symmetry(fe_substream, dai);
1737 if (err < 0)
1738 goto error;
1739 }
1740 }
1741 error:
1742 if (err < 0)
1743 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err);
1744
1745 return err;
1746 }
1747
dpcm_fe_dai_startup(struct snd_pcm_substream * fe_substream)1748 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1749 {
1750 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
1751 int stream = fe_substream->stream, ret = 0;
1752
1753 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1754
1755 ret = dpcm_be_dai_startup(fe, stream);
1756 if (ret < 0)
1757 goto be_err;
1758
1759 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1760
1761 /* start the DAI frontend */
1762 ret = soc_pcm_open(fe_substream);
1763 if (ret < 0)
1764 goto unwind;
1765
1766 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1767
1768 dpcm_runtime_setup_fe(fe_substream);
1769
1770 dpcm_runtime_setup_be_format(fe_substream);
1771 dpcm_runtime_setup_be_chan(fe_substream);
1772 dpcm_runtime_setup_be_rate(fe_substream);
1773
1774 ret = dpcm_apply_symmetry(fe_substream, stream);
1775
1776 unwind:
1777 if (ret < 0)
1778 dpcm_be_dai_startup_unwind(fe, stream);
1779 be_err:
1780 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1781
1782 if (ret < 0)
1783 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret);
1784
1785 return ret;
1786 }
1787
dpcm_fe_dai_shutdown(struct snd_pcm_substream * substream)1788 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1789 {
1790 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1791 int stream = substream->stream;
1792
1793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1794
1795 /* shutdown the BEs */
1796 dpcm_be_dai_shutdown(fe, stream);
1797
1798 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1799
1800 /* now shutdown the frontend */
1801 soc_pcm_close(substream);
1802
1803 /* run the stream stop event */
1804 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1805
1806 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1807 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1808 return 0;
1809 }
1810
dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime * fe,int stream)1811 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1812 {
1813 struct snd_soc_dpcm *dpcm;
1814
1815 /* only hw_params backends that are either sinks or sources
1816 * to this frontend DAI */
1817 for_each_dpcm_be(fe, stream, dpcm) {
1818
1819 struct snd_soc_pcm_runtime *be = dpcm->be;
1820 struct snd_pcm_substream *be_substream =
1821 snd_soc_dpcm_get_substream(be, stream);
1822
1823 /* is this op for this BE ? */
1824 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1825 continue;
1826
1827 /* only free hw when no longer used - check all FEs */
1828 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1829 continue;
1830
1831 /* do not free hw if this BE is used by other FE */
1832 if (be->dpcm[stream].users > 1)
1833 continue;
1834
1835 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1836 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1837 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1838 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1839 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1840 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1841 continue;
1842
1843 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1844 be->dai_link->name);
1845
1846 soc_pcm_hw_free(be_substream);
1847
1848 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1849 }
1850 }
1851
dpcm_fe_dai_hw_free(struct snd_pcm_substream * substream)1852 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1853 {
1854 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1855 int stream = substream->stream;
1856
1857 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1858 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1859
1860 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1861
1862 /* call hw_free on the frontend */
1863 soc_pcm_hw_free(substream);
1864
1865 /* only hw_params backends that are either sinks or sources
1866 * to this frontend DAI */
1867 dpcm_be_dai_hw_free(fe, stream);
1868
1869 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1870 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1871
1872 mutex_unlock(&fe->card->mutex);
1873 return 0;
1874 }
1875
dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime * fe,int stream)1876 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1877 {
1878 struct snd_soc_pcm_runtime *be;
1879 struct snd_pcm_substream *be_substream;
1880 struct snd_soc_dpcm *dpcm;
1881 int ret;
1882
1883 for_each_dpcm_be(fe, stream, dpcm) {
1884 be = dpcm->be;
1885 be_substream = snd_soc_dpcm_get_substream(be, stream);
1886
1887 /* is this op for this BE ? */
1888 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1889 continue;
1890
1891 /* copy params for each dpcm */
1892 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1893 sizeof(struct snd_pcm_hw_params));
1894
1895 /* perform any hw_params fixups */
1896 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params);
1897 if (ret < 0)
1898 goto unwind;
1899
1900 /* copy the fixed-up hw params for BE dai */
1901 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
1902 sizeof(struct snd_pcm_hw_params));
1903
1904 /* only allow hw_params() if no connected FEs are running */
1905 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1906 continue;
1907
1908 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1909 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1910 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1911 continue;
1912
1913 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1914 be->dai_link->name);
1915
1916 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1917 if (ret < 0)
1918 goto unwind;
1919
1920 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1921 }
1922 return 0;
1923
1924 unwind:
1925 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
1926 __func__, be->dai_link->name, ret);
1927
1928 /* disable any enabled and non active backends */
1929 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1930 be = dpcm->be;
1931 be_substream = snd_soc_dpcm_get_substream(be, stream);
1932
1933 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1934 continue;
1935
1936 /* only allow hw_free() if no connected FEs are running */
1937 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1938 continue;
1939
1940 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1941 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1942 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1943 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1944 continue;
1945
1946 soc_pcm_hw_free(be_substream);
1947 }
1948
1949 return ret;
1950 }
1951
dpcm_fe_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)1952 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1953 struct snd_pcm_hw_params *params)
1954 {
1955 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
1956 int ret, stream = substream->stream;
1957
1958 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1959 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1960
1961 memcpy(&fe->dpcm[stream].hw_params, params,
1962 sizeof(struct snd_pcm_hw_params));
1963 ret = dpcm_be_dai_hw_params(fe, stream);
1964 if (ret < 0)
1965 goto out;
1966
1967 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1968 fe->dai_link->name, params_rate(params),
1969 params_channels(params), params_format(params));
1970
1971 /* call hw_params on the frontend */
1972 ret = soc_pcm_hw_params(substream, params);
1973 if (ret < 0)
1974 dpcm_be_dai_hw_free(fe, stream);
1975 else
1976 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1977
1978 out:
1979 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1980 mutex_unlock(&fe->card->mutex);
1981
1982 if (ret < 0)
1983 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret);
1984
1985 return ret;
1986 }
1987
dpcm_be_dai_trigger(struct snd_soc_pcm_runtime * fe,int stream,int cmd)1988 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1989 int cmd)
1990 {
1991 struct snd_soc_pcm_runtime *be;
1992 struct snd_soc_dpcm *dpcm;
1993 int ret = 0;
1994
1995 for_each_dpcm_be(fe, stream, dpcm) {
1996 struct snd_pcm_substream *be_substream;
1997
1998 be = dpcm->be;
1999 be_substream = snd_soc_dpcm_get_substream(be, stream);
2000
2001 /* is this op for this BE ? */
2002 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2003 continue;
2004
2005 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2006 be->dai_link->name, cmd);
2007
2008 switch (cmd) {
2009 case SNDRV_PCM_TRIGGER_START:
2010 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2012 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2013 continue;
2014
2015 ret = soc_pcm_trigger(be_substream, cmd);
2016 if (ret)
2017 goto end;
2018
2019 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2020 break;
2021 case SNDRV_PCM_TRIGGER_RESUME:
2022 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2023 continue;
2024
2025 ret = soc_pcm_trigger(be_substream, cmd);
2026 if (ret)
2027 goto end;
2028
2029 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2030 break;
2031 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2032 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2033 continue;
2034
2035 ret = soc_pcm_trigger(be_substream, cmd);
2036 if (ret)
2037 goto end;
2038
2039 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2040 break;
2041 case SNDRV_PCM_TRIGGER_STOP:
2042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2044 continue;
2045
2046 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2047 continue;
2048
2049 ret = soc_pcm_trigger(be_substream, cmd);
2050 if (ret)
2051 goto end;
2052
2053 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2054 break;
2055 case SNDRV_PCM_TRIGGER_SUSPEND:
2056 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2057 continue;
2058
2059 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2060 continue;
2061
2062 ret = soc_pcm_trigger(be_substream, cmd);
2063 if (ret)
2064 goto end;
2065
2066 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2067 break;
2068 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2069 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2070 continue;
2071
2072 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2073 continue;
2074
2075 ret = soc_pcm_trigger(be_substream, cmd);
2076 if (ret)
2077 goto end;
2078
2079 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2080 break;
2081 }
2082 }
2083 end:
2084 if (ret < 0)
2085 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2086 __func__, be->dai_link->name, ret);
2087 return ret;
2088 }
2089 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2090
dpcm_dai_trigger_fe_be(struct snd_pcm_substream * substream,int cmd,bool fe_first)2091 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2092 int cmd, bool fe_first)
2093 {
2094 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2095 int ret;
2096
2097 /* call trigger on the frontend before the backend. */
2098 if (fe_first) {
2099 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2100 fe->dai_link->name, cmd);
2101
2102 ret = soc_pcm_trigger(substream, cmd);
2103 if (ret < 0)
2104 return ret;
2105
2106 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2107 return ret;
2108 }
2109
2110 /* call trigger on the frontend after the backend. */
2111 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2112 if (ret < 0)
2113 return ret;
2114
2115 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2116 fe->dai_link->name, cmd);
2117
2118 ret = soc_pcm_trigger(substream, cmd);
2119
2120 return ret;
2121 }
2122
dpcm_fe_dai_do_trigger(struct snd_pcm_substream * substream,int cmd)2123 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2124 {
2125 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2126 int stream = substream->stream;
2127 int ret = 0;
2128 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2129
2130 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2131
2132 switch (trigger) {
2133 case SND_SOC_DPCM_TRIGGER_PRE:
2134 switch (cmd) {
2135 case SNDRV_PCM_TRIGGER_START:
2136 case SNDRV_PCM_TRIGGER_RESUME:
2137 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2138 case SNDRV_PCM_TRIGGER_DRAIN:
2139 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2140 break;
2141 case SNDRV_PCM_TRIGGER_STOP:
2142 case SNDRV_PCM_TRIGGER_SUSPEND:
2143 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2144 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2145 break;
2146 default:
2147 ret = -EINVAL;
2148 break;
2149 }
2150 break;
2151 case SND_SOC_DPCM_TRIGGER_POST:
2152 switch (cmd) {
2153 case SNDRV_PCM_TRIGGER_START:
2154 case SNDRV_PCM_TRIGGER_RESUME:
2155 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2156 case SNDRV_PCM_TRIGGER_DRAIN:
2157 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2158 break;
2159 case SNDRV_PCM_TRIGGER_STOP:
2160 case SNDRV_PCM_TRIGGER_SUSPEND:
2161 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2162 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2163 break;
2164 default:
2165 ret = -EINVAL;
2166 break;
2167 }
2168 break;
2169 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2170 /* bespoke trigger() - handles both FE and BEs */
2171
2172 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2173 fe->dai_link->name, cmd);
2174
2175 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd);
2176 break;
2177 default:
2178 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2179 fe->dai_link->name);
2180 ret = -EINVAL;
2181 goto out;
2182 }
2183
2184 if (ret < 0) {
2185 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2186 cmd, ret);
2187 goto out;
2188 }
2189
2190 switch (cmd) {
2191 case SNDRV_PCM_TRIGGER_START:
2192 case SNDRV_PCM_TRIGGER_RESUME:
2193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2194 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2195 break;
2196 case SNDRV_PCM_TRIGGER_STOP:
2197 case SNDRV_PCM_TRIGGER_SUSPEND:
2198 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2199 break;
2200 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2201 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2202 break;
2203 }
2204
2205 out:
2206 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2207 return ret;
2208 }
2209
dpcm_fe_dai_trigger(struct snd_pcm_substream * substream,int cmd)2210 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2211 {
2212 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2213 int stream = substream->stream;
2214
2215 /* if FE's runtime_update is already set, we're in race;
2216 * process this trigger later at exit
2217 */
2218 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2219 fe->dpcm[stream].trigger_pending = cmd + 1;
2220 return 0; /* delayed, assuming it's successful */
2221 }
2222
2223 /* we're alone, let's trigger */
2224 return dpcm_fe_dai_do_trigger(substream, cmd);
2225 }
2226
dpcm_be_dai_prepare(struct snd_soc_pcm_runtime * fe,int stream)2227 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2228 {
2229 struct snd_soc_dpcm *dpcm;
2230 int ret = 0;
2231
2232 for_each_dpcm_be(fe, stream, dpcm) {
2233
2234 struct snd_soc_pcm_runtime *be = dpcm->be;
2235 struct snd_pcm_substream *be_substream =
2236 snd_soc_dpcm_get_substream(be, stream);
2237
2238 /* is this op for this BE ? */
2239 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2240 continue;
2241
2242 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2243 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2244 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2245 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2246 continue;
2247
2248 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2249 be->dai_link->name);
2250
2251 ret = soc_pcm_prepare(be_substream);
2252 if (ret < 0)
2253 break;
2254
2255 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2256 }
2257
2258 if (ret < 0)
2259 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2260
2261 return ret;
2262 }
2263
dpcm_fe_dai_prepare(struct snd_pcm_substream * substream)2264 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2265 {
2266 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream);
2267 int stream = substream->stream, ret = 0;
2268
2269 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2270
2271 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2272
2273 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2274
2275 /* there is no point preparing this FE if there are no BEs */
2276 if (list_empty(&fe->dpcm[stream].be_clients)) {
2277 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2278 fe->dai_link->name);
2279 ret = -EINVAL;
2280 goto out;
2281 }
2282
2283 ret = dpcm_be_dai_prepare(fe, stream);
2284 if (ret < 0)
2285 goto out;
2286
2287 /* call prepare on the frontend */
2288 ret = soc_pcm_prepare(substream);
2289 if (ret < 0)
2290 goto out;
2291
2292 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2293
2294 out:
2295 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2296 mutex_unlock(&fe->card->mutex);
2297
2298 if (ret < 0)
2299 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2300
2301 return ret;
2302 }
2303
dpcm_run_update_shutdown(struct snd_soc_pcm_runtime * fe,int stream)2304 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2305 {
2306 struct snd_pcm_substream *substream =
2307 snd_soc_dpcm_get_substream(fe, stream);
2308 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2309 int err;
2310
2311 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2312 stream ? "capture" : "playback", fe->dai_link->name);
2313
2314 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2315 /* call bespoke trigger - FE takes care of all BE triggers */
2316 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2317 fe->dai_link->name);
2318
2319 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2320 } else {
2321 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2322 fe->dai_link->name);
2323
2324 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2325 }
2326
2327 dpcm_be_dai_hw_free(fe, stream);
2328
2329 dpcm_be_dai_shutdown(fe, stream);
2330
2331 /* run the stream event for each BE */
2332 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2333
2334 if (err < 0)
2335 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err);
2336
2337 return err;
2338 }
2339
dpcm_run_update_startup(struct snd_soc_pcm_runtime * fe,int stream)2340 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2341 {
2342 struct snd_pcm_substream *substream =
2343 snd_soc_dpcm_get_substream(fe, stream);
2344 struct snd_soc_dpcm *dpcm;
2345 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2346 int ret = 0;
2347 unsigned long flags;
2348
2349 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2350 stream ? "capture" : "playback", fe->dai_link->name);
2351
2352 /* Only start the BE if the FE is ready */
2353 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2354 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2355 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2356 fe->dai_link->name, fe->dpcm[stream].state);
2357 ret = -EINVAL;
2358 goto disconnect;
2359 }
2360
2361 /* startup must always be called for new BEs */
2362 ret = dpcm_be_dai_startup(fe, stream);
2363 if (ret < 0)
2364 goto disconnect;
2365
2366 /* keep going if FE state is > open */
2367 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2368 return 0;
2369
2370 ret = dpcm_be_dai_hw_params(fe, stream);
2371 if (ret < 0)
2372 goto close;
2373
2374 /* keep going if FE state is > hw_params */
2375 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2376 return 0;
2377
2378 ret = dpcm_be_dai_prepare(fe, stream);
2379 if (ret < 0)
2380 goto hw_free;
2381
2382 /* run the stream event for each BE */
2383 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2384
2385 /* keep going if FE state is > prepare */
2386 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2387 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2388 return 0;
2389
2390 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2391 /* call trigger on the frontend - FE takes care of all BE triggers */
2392 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2393 fe->dai_link->name);
2394
2395 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2396 if (ret < 0)
2397 goto hw_free;
2398 } else {
2399 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2400 fe->dai_link->name);
2401
2402 ret = dpcm_be_dai_trigger(fe, stream,
2403 SNDRV_PCM_TRIGGER_START);
2404 if (ret < 0)
2405 goto hw_free;
2406 }
2407
2408 return 0;
2409
2410 hw_free:
2411 dpcm_be_dai_hw_free(fe, stream);
2412 close:
2413 dpcm_be_dai_shutdown(fe, stream);
2414 disconnect:
2415 /* disconnect any pending BEs */
2416 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2417 for_each_dpcm_be(fe, stream, dpcm) {
2418 struct snd_soc_pcm_runtime *be = dpcm->be;
2419
2420 /* is this op for this BE ? */
2421 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2422 continue;
2423
2424 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2425 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2426 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2427 }
2428 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2429
2430 if (ret < 0)
2431 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret);
2432
2433 return ret;
2434 }
2435
soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime * fe,int new)2436 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2437 {
2438 struct snd_soc_dapm_widget_list *list;
2439 int stream;
2440 int count, paths;
2441
2442 if (!fe->dai_link->dynamic)
2443 return 0;
2444
2445 if (fe->num_cpus > 1) {
2446 dev_err(fe->dev,
2447 "%s doesn't support Multi CPU yet\n", __func__);
2448 return -EINVAL;
2449 }
2450
2451 /* only check active links */
2452 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0)))
2453 return 0;
2454
2455 /* DAPM sync will call this to update DSP paths */
2456 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2457 new ? "new" : "old", fe->dai_link->name);
2458
2459 for_each_pcm_streams(stream) {
2460
2461 /* skip if FE doesn't have playback/capture capability */
2462 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) ||
2463 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream))
2464 continue;
2465
2466 /* skip if FE isn't currently playing/capturing */
2467 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) ||
2468 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream))
2469 continue;
2470
2471 paths = dpcm_path_get(fe, stream, &list);
2472 if (paths < 0)
2473 return paths;
2474
2475 /* update any playback/capture paths */
2476 count = dpcm_process_paths(fe, stream, &list, new);
2477 if (count) {
2478 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2479 if (new)
2480 dpcm_run_update_startup(fe, stream);
2481 else
2482 dpcm_run_update_shutdown(fe, stream);
2483 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2484
2485 dpcm_clear_pending_state(fe, stream);
2486 dpcm_be_disconnect(fe, stream);
2487 }
2488
2489 dpcm_path_put(&list);
2490 }
2491
2492 return 0;
2493 }
2494
2495 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2496 * any DAI links.
2497 */
snd_soc_dpcm_runtime_update(struct snd_soc_card * card)2498 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2499 {
2500 struct snd_soc_pcm_runtime *fe;
2501 int ret = 0;
2502
2503 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2504 /* shutdown all old paths first */
2505 for_each_card_rtds(card, fe) {
2506 ret = soc_dpcm_fe_runtime_update(fe, 0);
2507 if (ret)
2508 goto out;
2509 }
2510
2511 /* bring new paths up */
2512 for_each_card_rtds(card, fe) {
2513 ret = soc_dpcm_fe_runtime_update(fe, 1);
2514 if (ret)
2515 goto out;
2516 }
2517
2518 out:
2519 mutex_unlock(&card->mutex);
2520 return ret;
2521 }
2522 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2523
dpcm_fe_dai_cleanup(struct snd_pcm_substream * fe_substream)2524 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2525 {
2526 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2527 struct snd_soc_dpcm *dpcm;
2528 int stream = fe_substream->stream;
2529
2530 /* mark FE's links ready to prune */
2531 for_each_dpcm_be(fe, stream, dpcm)
2532 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2533
2534 dpcm_be_disconnect(fe, stream);
2535
2536 fe->dpcm[stream].runtime = NULL;
2537 }
2538
dpcm_fe_dai_close(struct snd_pcm_substream * fe_substream)2539 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2540 {
2541 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2542 int ret;
2543
2544 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2545 ret = dpcm_fe_dai_shutdown(fe_substream);
2546
2547 dpcm_fe_dai_cleanup(fe_substream);
2548
2549 mutex_unlock(&fe->card->mutex);
2550 return ret;
2551 }
2552
dpcm_fe_dai_open(struct snd_pcm_substream * fe_substream)2553 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2554 {
2555 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream);
2556 struct snd_soc_dapm_widget_list *list;
2557 int ret;
2558 int stream = fe_substream->stream;
2559
2560 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2561 fe->dpcm[stream].runtime = fe_substream->runtime;
2562
2563 ret = dpcm_path_get(fe, stream, &list);
2564 if (ret < 0)
2565 goto open_end;
2566
2567 /* calculate valid and active FE <-> BE dpcms */
2568 dpcm_process_paths(fe, stream, &list, 1);
2569
2570 ret = dpcm_fe_dai_startup(fe_substream);
2571 if (ret < 0)
2572 dpcm_fe_dai_cleanup(fe_substream);
2573
2574 dpcm_clear_pending_state(fe, stream);
2575 dpcm_path_put(&list);
2576 open_end:
2577 mutex_unlock(&fe->card->mutex);
2578 return ret;
2579 }
2580
soc_get_playback_capture(struct snd_soc_pcm_runtime * rtd,int * playback,int * capture)2581 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2582 int *playback, int *capture)
2583 {
2584 struct snd_soc_dai *codec_dai;
2585 struct snd_soc_dai *cpu_dai;
2586 int stream;
2587 int i;
2588
2589 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) {
2590 dev_err(rtd->dev,
2591 "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2592 return -EINVAL;
2593 }
2594
2595 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2596 if (rtd->dai_link->dpcm_playback) {
2597 stream = SNDRV_PCM_STREAM_PLAYBACK;
2598
2599 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2600 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2601 *playback = 1;
2602 break;
2603 }
2604 }
2605 if (!*playback) {
2606 dev_err(rtd->card->dev,
2607 "No CPU DAIs support playback for stream %s\n",
2608 rtd->dai_link->stream_name);
2609 return -EINVAL;
2610 }
2611 }
2612 if (rtd->dai_link->dpcm_capture) {
2613 stream = SNDRV_PCM_STREAM_CAPTURE;
2614
2615 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
2616 if (snd_soc_dai_stream_valid(cpu_dai, stream)) {
2617 *capture = 1;
2618 break;
2619 }
2620 }
2621
2622 if (!*capture) {
2623 dev_err(rtd->card->dev,
2624 "No CPU DAIs support capture for stream %s\n",
2625 rtd->dai_link->stream_name);
2626 return -EINVAL;
2627 }
2628 }
2629 } else {
2630 /* Adapt stream for codec2codec links */
2631 int cpu_capture = rtd->dai_link->params ?
2632 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2633 int cpu_playback = rtd->dai_link->params ?
2634 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2635
2636 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2637 if (rtd->num_cpus == 1) {
2638 cpu_dai = asoc_rtd_to_cpu(rtd, 0);
2639 } else if (rtd->num_cpus == rtd->num_codecs) {
2640 cpu_dai = asoc_rtd_to_cpu(rtd, i);
2641 } else {
2642 dev_err(rtd->card->dev,
2643 "N cpus to M codecs link is not supported yet\n");
2644 return -EINVAL;
2645 }
2646
2647 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2648 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2649 *playback = 1;
2650 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2651 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2652 *capture = 1;
2653 }
2654 }
2655
2656 if (rtd->dai_link->playback_only) {
2657 *playback = 1;
2658 *capture = 0;
2659 }
2660
2661 if (rtd->dai_link->capture_only) {
2662 *playback = 0;
2663 *capture = 1;
2664 }
2665
2666 return 0;
2667 }
2668
soc_create_pcm(struct snd_pcm ** pcm,struct snd_soc_pcm_runtime * rtd,int playback,int capture,int num)2669 static int soc_create_pcm(struct snd_pcm **pcm,
2670 struct snd_soc_pcm_runtime *rtd,
2671 int playback, int capture, int num)
2672 {
2673 char new_name[64];
2674 int ret;
2675
2676 /* create the PCM */
2677 if (rtd->dai_link->params) {
2678 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2679 rtd->dai_link->stream_name);
2680
2681 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2682 playback, capture, pcm);
2683 } else if (rtd->dai_link->no_pcm) {
2684 snprintf(new_name, sizeof(new_name), "(%s)",
2685 rtd->dai_link->stream_name);
2686
2687 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2688 playback, capture, pcm);
2689 } else {
2690 if (rtd->dai_link->dynamic)
2691 snprintf(new_name, sizeof(new_name), "%s (*)",
2692 rtd->dai_link->stream_name);
2693 else
2694 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2695 rtd->dai_link->stream_name,
2696 soc_codec_dai_name(rtd), num);
2697
2698 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2699 capture, pcm);
2700 }
2701 if (ret < 0) {
2702 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2703 new_name, rtd->dai_link->name, ret);
2704 return ret;
2705 }
2706 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2707
2708 return 0;
2709 }
2710
2711 /* create a new pcm */
soc_new_pcm(struct snd_soc_pcm_runtime * rtd,int num)2712 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2713 {
2714 struct snd_soc_component *component;
2715 struct snd_pcm *pcm;
2716 int ret = 0, playback = 0, capture = 0;
2717 int i;
2718
2719 ret = soc_get_playback_capture(rtd, &playback, &capture);
2720 if (ret < 0)
2721 return ret;
2722
2723 ret = soc_create_pcm(&pcm, rtd, playback, capture, num);
2724 if (ret < 0)
2725 return ret;
2726
2727 /* DAPM dai link stream work */
2728 if (rtd->dai_link->params)
2729 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2730 else
2731 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2732
2733 rtd->pcm = pcm;
2734 pcm->nonatomic = rtd->dai_link->nonatomic;
2735 pcm->private_data = rtd;
2736
2737 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2738 if (playback)
2739 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2740 if (capture)
2741 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2742 goto out;
2743 }
2744
2745 /* ASoC PCM operations */
2746 if (rtd->dai_link->dynamic) {
2747 rtd->ops.open = dpcm_fe_dai_open;
2748 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2749 rtd->ops.prepare = dpcm_fe_dai_prepare;
2750 rtd->ops.trigger = dpcm_fe_dai_trigger;
2751 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2752 rtd->ops.close = dpcm_fe_dai_close;
2753 rtd->ops.pointer = soc_pcm_pointer;
2754 } else {
2755 rtd->ops.open = soc_pcm_open;
2756 rtd->ops.hw_params = soc_pcm_hw_params;
2757 rtd->ops.prepare = soc_pcm_prepare;
2758 rtd->ops.trigger = soc_pcm_trigger;
2759 rtd->ops.hw_free = soc_pcm_hw_free;
2760 rtd->ops.close = soc_pcm_close;
2761 rtd->ops.pointer = soc_pcm_pointer;
2762 }
2763
2764 for_each_rtd_components(rtd, i, component) {
2765 const struct snd_soc_component_driver *drv = component->driver;
2766
2767 if (drv->ioctl)
2768 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2769 if (drv->sync_stop)
2770 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2771 if (drv->copy_user)
2772 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2773 if (drv->page)
2774 rtd->ops.page = snd_soc_pcm_component_page;
2775 if (drv->mmap)
2776 rtd->ops.mmap = snd_soc_pcm_component_mmap;
2777 if (drv->ack)
2778 rtd->ops.ack = snd_soc_pcm_component_ack;
2779 }
2780
2781 if (playback)
2782 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2783
2784 if (capture)
2785 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2786
2787 ret = snd_soc_pcm_component_new(rtd);
2788 if (ret < 0)
2789 return ret;
2790
2791 pcm->no_device_suspend = true;
2792 out:
2793 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
2794 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
2795 return ret;
2796 }
2797
2798 /* is the current PCM operation for this FE ? */
snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime * fe,int stream)2799 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2800 {
2801 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2802 return 1;
2803 return 0;
2804 }
2805 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2806
2807 /* is the current PCM operation for this BE ? */
snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2808 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2809 struct snd_soc_pcm_runtime *be, int stream)
2810 {
2811 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2812 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2813 be->dpcm[stream].runtime_update))
2814 return 1;
2815 return 0;
2816 }
2817 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2818
2819 /* get the substream for this BE */
2820 struct snd_pcm_substream *
snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime * be,int stream)2821 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2822 {
2823 return be->pcm->streams[stream].substream;
2824 }
2825 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2826
snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream,const enum snd_soc_dpcm_state * states,int num_states)2827 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
2828 struct snd_soc_pcm_runtime *be,
2829 int stream,
2830 const enum snd_soc_dpcm_state *states,
2831 int num_states)
2832 {
2833 struct snd_soc_dpcm *dpcm;
2834 int state;
2835 int ret = 1;
2836 unsigned long flags;
2837 int i;
2838
2839 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2840 for_each_dpcm_fe(be, stream, dpcm) {
2841
2842 if (dpcm->fe == fe)
2843 continue;
2844
2845 state = dpcm->fe->dpcm[stream].state;
2846 for (i = 0; i < num_states; i++) {
2847 if (state == states[i]) {
2848 ret = 0;
2849 break;
2850 }
2851 }
2852 }
2853 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2854
2855 /* it's safe to do this BE DAI */
2856 return ret;
2857 }
2858
2859 /*
2860 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2861 * are not running, paused or suspended for the specified stream direction.
2862 */
snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2863 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2864 struct snd_soc_pcm_runtime *be, int stream)
2865 {
2866 const enum snd_soc_dpcm_state state[] = {
2867 SND_SOC_DPCM_STATE_START,
2868 SND_SOC_DPCM_STATE_PAUSED,
2869 SND_SOC_DPCM_STATE_SUSPEND,
2870 };
2871
2872 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2873 }
2874 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2875
2876 /*
2877 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2878 * running, paused or suspended for the specified stream direction.
2879 */
snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2880 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2881 struct snd_soc_pcm_runtime *be, int stream)
2882 {
2883 const enum snd_soc_dpcm_state state[] = {
2884 SND_SOC_DPCM_STATE_START,
2885 SND_SOC_DPCM_STATE_PAUSED,
2886 SND_SOC_DPCM_STATE_SUSPEND,
2887 SND_SOC_DPCM_STATE_PREPARE,
2888 };
2889
2890 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
2891 }
2892 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2893