xref: /openbmc/linux/sound/soc/soc-compress.c (revision 8b036556) 
1 /*
2  * soc-compress.c  --  ALSA SoC Compress
3  *
4  * Copyright (C) 2012 Intel Corp.
5  *
6  * Authors: Namarta Kohli <namartax.kohli@intel.com>
7  *          Ramesh Babu K V <ramesh.babu@linux.intel.com>
8  *          Vinod Koul <vinod.koul@linux.intel.com>
9  *
10  *  This program is free software; you can redistribute  it and/or modify it
11  *  under  the terms of  the GNU General  Public License as published by the
12  *  Free Software Foundation;  either version 2 of the  License, or (at your
13  *  option) any later version.
14  *
15  */
16 
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/slab.h>
21 #include <linux/workqueue.h>
22 #include <sound/core.h>
23 #include <sound/compress_params.h>
24 #include <sound/compress_driver.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/soc-dpcm.h>
28 
29 static int soc_compr_open(struct snd_compr_stream *cstream)
30 {
31 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
32 	struct snd_soc_platform *platform = rtd->platform;
33 	int ret = 0;
34 
35 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
36 
37 	if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
38 		ret = platform->driver->compr_ops->open(cstream);
39 		if (ret < 0) {
40 			pr_err("compress asoc: can't open platform %s\n",
41 				platform->component.name);
42 			goto out;
43 		}
44 	}
45 
46 	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
47 		ret = rtd->dai_link->compr_ops->startup(cstream);
48 		if (ret < 0) {
49 			pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
50 			goto machine_err;
51 		}
52 	}
53 
54 	snd_soc_runtime_activate(rtd, cstream->direction);
55 
56 	mutex_unlock(&rtd->pcm_mutex);
57 
58 	return 0;
59 
60 machine_err:
61 	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
62 		platform->driver->compr_ops->free(cstream);
63 out:
64 	mutex_unlock(&rtd->pcm_mutex);
65 	return ret;
66 }
67 
68 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
69 {
70 	struct snd_soc_pcm_runtime *fe = cstream->private_data;
71 	struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
72 	struct snd_soc_platform *platform = fe->platform;
73 	struct snd_soc_dpcm *dpcm;
74 	struct snd_soc_dapm_widget_list *list;
75 	int stream;
76 	int ret = 0;
77 
78 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
79 		stream = SNDRV_PCM_STREAM_PLAYBACK;
80 	else
81 		stream = SNDRV_PCM_STREAM_CAPTURE;
82 
83 	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
84 
85 	if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
86 		ret = platform->driver->compr_ops->open(cstream);
87 		if (ret < 0) {
88 			pr_err("compress asoc: can't open platform %s\n",
89 				platform->component.name);
90 			goto out;
91 		}
92 	}
93 
94 	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
95 		ret = fe->dai_link->compr_ops->startup(cstream);
96 		if (ret < 0) {
97 			pr_err("compress asoc: %s startup failed\n", fe->dai_link->name);
98 			goto machine_err;
99 		}
100 	}
101 
102 	fe->dpcm[stream].runtime = fe_substream->runtime;
103 
104 	ret = dpcm_path_get(fe, stream, &list);
105 	if (ret < 0)
106 		goto fe_err;
107 	else if (ret == 0)
108 		dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
109 			fe->dai_link->name, stream ? "capture" : "playback");
110 
111 	/* calculate valid and active FE <-> BE dpcms */
112 	dpcm_process_paths(fe, stream, &list, 1);
113 
114 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
115 
116 	ret = dpcm_be_dai_startup(fe, stream);
117 	if (ret < 0) {
118 		/* clean up all links */
119 		list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
120 			dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
121 
122 		dpcm_be_disconnect(fe, stream);
123 		fe->dpcm[stream].runtime = NULL;
124 		goto fe_err;
125 	}
126 
127 	dpcm_clear_pending_state(fe, stream);
128 	dpcm_path_put(&list);
129 
130 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
131 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
132 
133 	snd_soc_runtime_activate(fe, stream);
134 
135 	mutex_unlock(&fe->card->mutex);
136 
137 	return 0;
138 
139 fe_err:
140 	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
141 		fe->dai_link->compr_ops->shutdown(cstream);
142 machine_err:
143 	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
144 		platform->driver->compr_ops->free(cstream);
145 out:
146 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
147 	mutex_unlock(&fe->card->mutex);
148 	return ret;
149 }
150 
151 /*
152  * Power down the audio subsystem pmdown_time msecs after close is called.
153  * This is to ensure there are no pops or clicks in between any music tracks
154  * due to DAPM power cycling.
155  */
156 static void close_delayed_work(struct work_struct *work)
157 {
158 	struct snd_soc_pcm_runtime *rtd =
159 			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
160 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
161 
162 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
163 
164 	dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
165 		 codec_dai->driver->playback.stream_name,
166 		 codec_dai->playback_active ? "active" : "inactive",
167 		 rtd->pop_wait ? "yes" : "no");
168 
169 	/* are we waiting on this codec DAI stream */
170 	if (rtd->pop_wait == 1) {
171 		rtd->pop_wait = 0;
172 		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
173 					  SND_SOC_DAPM_STREAM_STOP);
174 	}
175 
176 	mutex_unlock(&rtd->pcm_mutex);
177 }
178 
179 static int soc_compr_free(struct snd_compr_stream *cstream)
180 {
181 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
182 	struct snd_soc_platform *platform = rtd->platform;
183 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
184 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
185 	int stream;
186 
187 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
188 
189 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
190 		stream = SNDRV_PCM_STREAM_PLAYBACK;
191 	else
192 		stream = SNDRV_PCM_STREAM_CAPTURE;
193 
194 	snd_soc_runtime_deactivate(rtd, stream);
195 
196 	snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
197 
198 	if (!cpu_dai->active)
199 		cpu_dai->rate = 0;
200 
201 	if (!codec_dai->active)
202 		codec_dai->rate = 0;
203 
204 
205 	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
206 		rtd->dai_link->compr_ops->shutdown(cstream);
207 
208 	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
209 		platform->driver->compr_ops->free(cstream);
210 
211 	if (cstream->direction == SND_COMPRESS_PLAYBACK) {
212 		if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
213 			snd_soc_dapm_stream_event(rtd,
214 					SNDRV_PCM_STREAM_PLAYBACK,
215 					SND_SOC_DAPM_STREAM_STOP);
216 		} else {
217 			rtd->pop_wait = 1;
218 			queue_delayed_work(system_power_efficient_wq,
219 					   &rtd->delayed_work,
220 					   msecs_to_jiffies(rtd->pmdown_time));
221 		}
222 	} else {
223 		/* capture streams can be powered down now */
224 		snd_soc_dapm_stream_event(rtd,
225 			SNDRV_PCM_STREAM_CAPTURE,
226 			SND_SOC_DAPM_STREAM_STOP);
227 	}
228 
229 	mutex_unlock(&rtd->pcm_mutex);
230 	return 0;
231 }
232 
233 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
234 {
235 	struct snd_soc_pcm_runtime *fe = cstream->private_data;
236 	struct snd_soc_platform *platform = fe->platform;
237 	struct snd_soc_dpcm *dpcm;
238 	int stream, ret;
239 
240 	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
241 
242 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
243 		stream = SNDRV_PCM_STREAM_PLAYBACK;
244 	else
245 		stream = SNDRV_PCM_STREAM_CAPTURE;
246 
247 	snd_soc_runtime_deactivate(fe, stream);
248 
249 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
250 
251 	ret = dpcm_be_dai_hw_free(fe, stream);
252 	if (ret < 0)
253 		dev_err(fe->dev, "compressed hw_free failed %d\n", ret);
254 
255 	ret = dpcm_be_dai_shutdown(fe, stream);
256 
257 	/* mark FE's links ready to prune */
258 	list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
259 		dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
260 
261 	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
262 
263 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
264 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
265 
266 	dpcm_be_disconnect(fe, stream);
267 
268 	fe->dpcm[stream].runtime = NULL;
269 
270 	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
271 		fe->dai_link->compr_ops->shutdown(cstream);
272 
273 	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
274 		platform->driver->compr_ops->free(cstream);
275 
276 	mutex_unlock(&fe->card->mutex);
277 	return 0;
278 }
279 
280 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
281 {
282 
283 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
284 	struct snd_soc_platform *platform = rtd->platform;
285 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
286 	int ret = 0;
287 
288 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
289 
290 	if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
291 		ret = platform->driver->compr_ops->trigger(cstream, cmd);
292 		if (ret < 0)
293 			goto out;
294 	}
295 
296 	switch (cmd) {
297 	case SNDRV_PCM_TRIGGER_START:
298 		snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
299 		break;
300 	case SNDRV_PCM_TRIGGER_STOP:
301 		snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
302 		break;
303 	}
304 
305 out:
306 	mutex_unlock(&rtd->pcm_mutex);
307 	return ret;
308 }
309 
310 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
311 {
312 	struct snd_soc_pcm_runtime *fe = cstream->private_data;
313 	struct snd_soc_platform *platform = fe->platform;
314 	int ret = 0, stream;
315 
316 	if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
317 		cmd == SND_COMPR_TRIGGER_DRAIN) {
318 
319 		if (platform->driver->compr_ops &&
320 		    platform->driver->compr_ops->trigger)
321 			return platform->driver->compr_ops->trigger(cstream,
322 								    cmd);
323 	}
324 
325 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
326 		stream = SNDRV_PCM_STREAM_PLAYBACK;
327 	else
328 		stream = SNDRV_PCM_STREAM_CAPTURE;
329 
330 
331 	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
332 
333 	if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
334 		ret = platform->driver->compr_ops->trigger(cstream, cmd);
335 		if (ret < 0)
336 			goto out;
337 	}
338 
339 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
340 
341 	ret = dpcm_be_dai_trigger(fe, stream, cmd);
342 
343 	switch (cmd) {
344 	case SNDRV_PCM_TRIGGER_START:
345 	case SNDRV_PCM_TRIGGER_RESUME:
346 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
347 		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
348 		break;
349 	case SNDRV_PCM_TRIGGER_STOP:
350 	case SNDRV_PCM_TRIGGER_SUSPEND:
351 		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
352 		break;
353 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
354 		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
355 		break;
356 	}
357 
358 out:
359 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
360 	mutex_unlock(&fe->card->mutex);
361 	return ret;
362 }
363 
364 static int soc_compr_set_params(struct snd_compr_stream *cstream,
365 					struct snd_compr_params *params)
366 {
367 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
368 	struct snd_soc_platform *platform = rtd->platform;
369 	int ret = 0;
370 
371 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
372 
373 	/* first we call set_params for the platform driver
374 	 * this should configure the soc side
375 	 * if the machine has compressed ops then we call that as well
376 	 * expectation is that platform and machine will configure everything
377 	 * for this compress path, like configuring pcm port for codec
378 	 */
379 	if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
380 		ret = platform->driver->compr_ops->set_params(cstream, params);
381 		if (ret < 0)
382 			goto err;
383 	}
384 
385 	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
386 		ret = rtd->dai_link->compr_ops->set_params(cstream);
387 		if (ret < 0)
388 			goto err;
389 	}
390 
391 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
392 		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
393 					SND_SOC_DAPM_STREAM_START);
394 	else
395 		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
396 					SND_SOC_DAPM_STREAM_START);
397 
398 	/* cancel any delayed stream shutdown that is pending */
399 	rtd->pop_wait = 0;
400 	mutex_unlock(&rtd->pcm_mutex);
401 
402 	cancel_delayed_work_sync(&rtd->delayed_work);
403 
404 	return ret;
405 
406 err:
407 	mutex_unlock(&rtd->pcm_mutex);
408 	return ret;
409 }
410 
411 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
412 					struct snd_compr_params *params)
413 {
414 	struct snd_soc_pcm_runtime *fe = cstream->private_data;
415 	struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
416 	struct snd_soc_platform *platform = fe->platform;
417 	int ret = 0, stream;
418 
419 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
420 		stream = SNDRV_PCM_STREAM_PLAYBACK;
421 	else
422 		stream = SNDRV_PCM_STREAM_CAPTURE;
423 
424 	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
425 
426 	if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
427 		ret = platform->driver->compr_ops->set_params(cstream, params);
428 		if (ret < 0)
429 			goto out;
430 	}
431 
432 	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
433 		ret = fe->dai_link->compr_ops->set_params(cstream);
434 		if (ret < 0)
435 			goto out;
436 	}
437 
438 	/*
439 	 * Create an empty hw_params for the BE as the machine driver must
440 	 * fix this up to match DSP decoder and ASRC configuration.
441 	 * I.e. machine driver fixup for compressed BE is mandatory.
442 	 */
443 	memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
444 		sizeof(struct snd_pcm_hw_params));
445 
446 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
447 
448 	ret = dpcm_be_dai_hw_params(fe, stream);
449 	if (ret < 0)
450 		goto out;
451 
452 	ret = dpcm_be_dai_prepare(fe, stream);
453 	if (ret < 0)
454 		goto out;
455 
456 	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
457 	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
458 
459 out:
460 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
461 	mutex_unlock(&fe->card->mutex);
462 	return ret;
463 }
464 
465 static int soc_compr_get_params(struct snd_compr_stream *cstream,
466 					struct snd_codec *params)
467 {
468 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
469 	struct snd_soc_platform *platform = rtd->platform;
470 	int ret = 0;
471 
472 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
473 
474 	if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
475 		ret = platform->driver->compr_ops->get_params(cstream, params);
476 
477 	mutex_unlock(&rtd->pcm_mutex);
478 	return ret;
479 }
480 
481 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
482 				struct snd_compr_caps *caps)
483 {
484 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
485 	struct snd_soc_platform *platform = rtd->platform;
486 	int ret = 0;
487 
488 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
489 
490 	if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
491 		ret = platform->driver->compr_ops->get_caps(cstream, caps);
492 
493 	mutex_unlock(&rtd->pcm_mutex);
494 	return ret;
495 }
496 
497 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
498 				struct snd_compr_codec_caps *codec)
499 {
500 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
501 	struct snd_soc_platform *platform = rtd->platform;
502 	int ret = 0;
503 
504 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
505 
506 	if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
507 		ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
508 
509 	mutex_unlock(&rtd->pcm_mutex);
510 	return ret;
511 }
512 
513 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
514 {
515 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
516 	struct snd_soc_platform *platform = rtd->platform;
517 	int ret = 0;
518 
519 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
520 
521 	if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
522 		ret = platform->driver->compr_ops->ack(cstream, bytes);
523 
524 	mutex_unlock(&rtd->pcm_mutex);
525 	return ret;
526 }
527 
528 static int soc_compr_pointer(struct snd_compr_stream *cstream,
529 			struct snd_compr_tstamp *tstamp)
530 {
531 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
532 	struct snd_soc_platform *platform = rtd->platform;
533 
534 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
535 
536 	if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
537 		 platform->driver->compr_ops->pointer(cstream, tstamp);
538 
539 	mutex_unlock(&rtd->pcm_mutex);
540 	return 0;
541 }
542 
543 static int soc_compr_copy(struct snd_compr_stream *cstream,
544 			  char __user *buf, size_t count)
545 {
546 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
547 	struct snd_soc_platform *platform = rtd->platform;
548 	int ret = 0;
549 
550 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
551 
552 	if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
553 		ret = platform->driver->compr_ops->copy(cstream, buf, count);
554 
555 	mutex_unlock(&rtd->pcm_mutex);
556 	return ret;
557 }
558 
559 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
560 				struct snd_compr_metadata *metadata)
561 {
562 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
563 	struct snd_soc_platform *platform = rtd->platform;
564 	int ret = 0;
565 
566 	if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata)
567 		ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
568 
569 	return ret;
570 }
571 
572 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
573 				struct snd_compr_metadata *metadata)
574 {
575 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
576 	struct snd_soc_platform *platform = rtd->platform;
577 	int ret = 0;
578 
579 	if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata)
580 		ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
581 
582 	return ret;
583 }
584 
585 /* ASoC Compress operations */
586 static struct snd_compr_ops soc_compr_ops = {
587 	.open		= soc_compr_open,
588 	.free		= soc_compr_free,
589 	.set_params	= soc_compr_set_params,
590 	.set_metadata   = soc_compr_set_metadata,
591 	.get_metadata	= soc_compr_get_metadata,
592 	.get_params	= soc_compr_get_params,
593 	.trigger	= soc_compr_trigger,
594 	.pointer	= soc_compr_pointer,
595 	.ack		= soc_compr_ack,
596 	.get_caps	= soc_compr_get_caps,
597 	.get_codec_caps = soc_compr_get_codec_caps
598 };
599 
600 /* ASoC Dynamic Compress operations */
601 static struct snd_compr_ops soc_compr_dyn_ops = {
602 	.open		= soc_compr_open_fe,
603 	.free		= soc_compr_free_fe,
604 	.set_params	= soc_compr_set_params_fe,
605 	.get_params	= soc_compr_get_params,
606 	.set_metadata   = soc_compr_set_metadata,
607 	.get_metadata	= soc_compr_get_metadata,
608 	.trigger	= soc_compr_trigger_fe,
609 	.pointer	= soc_compr_pointer,
610 	.ack		= soc_compr_ack,
611 	.get_caps	= soc_compr_get_caps,
612 	.get_codec_caps = soc_compr_get_codec_caps
613 };
614 
615 /* create a new compress */
616 int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
617 {
618 	struct snd_soc_codec *codec = rtd->codec;
619 	struct snd_soc_platform *platform = rtd->platform;
620 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
621 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
622 	struct snd_compr *compr;
623 	struct snd_pcm *be_pcm;
624 	char new_name[64];
625 	int ret = 0, direction = 0;
626 
627 	if (rtd->num_codecs > 1) {
628 		dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n");
629 		return -EINVAL;
630 	}
631 
632 	/* check client and interface hw capabilities */
633 	snprintf(new_name, sizeof(new_name), "%s %s-%d",
634 			rtd->dai_link->stream_name, codec_dai->name, num);
635 
636 	if (codec_dai->driver->playback.channels_min)
637 		direction = SND_COMPRESS_PLAYBACK;
638 	else if (codec_dai->driver->capture.channels_min)
639 		direction = SND_COMPRESS_CAPTURE;
640 	else
641 		return -EINVAL;
642 
643 	compr = kzalloc(sizeof(*compr), GFP_KERNEL);
644 	if (compr == NULL) {
645 		snd_printk(KERN_ERR "Cannot allocate compr\n");
646 		return -ENOMEM;
647 	}
648 
649 	compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
650 				  GFP_KERNEL);
651 	if (compr->ops == NULL) {
652 		dev_err(rtd->card->dev, "Cannot allocate compressed ops\n");
653 		ret = -ENOMEM;
654 		goto compr_err;
655 	}
656 
657 	if (rtd->dai_link->dynamic) {
658 		snprintf(new_name, sizeof(new_name), "(%s)",
659 			rtd->dai_link->stream_name);
660 
661 		ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
662 				rtd->dai_link->dpcm_playback,
663 				rtd->dai_link->dpcm_capture, &be_pcm);
664 		if (ret < 0) {
665 			dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n",
666 				rtd->dai_link->name);
667 			goto compr_err;
668 		}
669 
670 		rtd->pcm = be_pcm;
671 		rtd->fe_compr = 1;
672 		if (rtd->dai_link->dpcm_playback)
673 			be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
674 		else if (rtd->dai_link->dpcm_capture)
675 			be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
676 		memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
677 	} else
678 		memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
679 
680 	/* Add copy callback for not memory mapped DSPs */
681 	if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
682 		compr->ops->copy = soc_compr_copy;
683 
684 	mutex_init(&compr->lock);
685 	ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
686 	if (ret < 0) {
687 		pr_err("compress asoc: can't create compress for codec %s\n",
688 			codec->component.name);
689 		goto compr_err;
690 	}
691 
692 	/* DAPM dai link stream work */
693 	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
694 
695 	rtd->compr = compr;
696 	compr->private_data = rtd;
697 
698 	printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,
699 		cpu_dai->name);
700 	return ret;
701 
702 compr_err:
703 	kfree(compr);
704 	return ret;
705 }
706