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Linux/sound/soc/soc-compress.c

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  1 // SPDX-License-Identifier: GPL-2.0+
  2 //
  3 // soc-compress.c  --  ALSA SoC Compress
  4 //
  5 // Copyright (C) 2012 Intel Corp.
  6 //
  7 // Authors: Namarta Kohli <namartax.kohli@intel.com>
  8 //          Ramesh Babu K V <ramesh.babu@linux.intel.com>
  9 //          Vinod Koul <vinod.koul@linux.intel.com>
 10 
 11 #include <linux/kernel.h>
 12 #include <linux/init.h>
 13 #include <linux/delay.h>
 14 #include <linux/slab.h>
 15 #include <linux/workqueue.h>
 16 #include <sound/core.h>
 17 #include <sound/compress_params.h>
 18 #include <sound/compress_driver.h>
 19 #include <sound/soc.h>
 20 #include <sound/initval.h>
 21 #include <sound/soc-dpcm.h>
 22 
 23 static int soc_compr_components_open(struct snd_compr_stream *cstream,
 24                                      struct snd_soc_component **last)
 25 {
 26         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 27         struct snd_soc_component *component;
 28         struct snd_soc_rtdcom_list *rtdcom;
 29         int ret;
 30 
 31         for_each_rtdcom(rtd, rtdcom) {
 32                 component = rtdcom->component;
 33 
 34                 if (!component->driver->compr_ops ||
 35                     !component->driver->compr_ops->open)
 36                         continue;
 37 
 38                 ret = component->driver->compr_ops->open(cstream);
 39                 if (ret < 0) {
 40                         dev_err(component->dev,
 41                                 "Compress ASoC: can't open platform %s: %d\n",
 42                                 component->name, ret);
 43 
 44                         *last = component;
 45                         return ret;
 46                 }
 47         }
 48 
 49         *last = NULL;
 50         return 0;
 51 }
 52 
 53 static int soc_compr_components_free(struct snd_compr_stream *cstream,
 54                                      struct snd_soc_component *last)
 55 {
 56         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 57         struct snd_soc_component *component;
 58         struct snd_soc_rtdcom_list *rtdcom;
 59 
 60         for_each_rtdcom(rtd, rtdcom) {
 61                 component = rtdcom->component;
 62 
 63                 if (component == last)
 64                         break;
 65 
 66                 if (!component->driver->compr_ops ||
 67                     !component->driver->compr_ops->free)
 68                         continue;
 69 
 70                 component->driver->compr_ops->free(cstream);
 71         }
 72 
 73         return 0;
 74 }
 75 
 76 static int soc_compr_open(struct snd_compr_stream *cstream)
 77 {
 78         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 79         struct snd_soc_component *component;
 80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 81         int ret;
 82 
 83         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 84 
 85         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
 86                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
 87                 if (ret < 0) {
 88                         dev_err(cpu_dai->dev,
 89                                 "Compress ASoC: can't open interface %s: %d\n",
 90                                 cpu_dai->name, ret);
 91                         goto out;
 92                 }
 93         }
 94 
 95         ret = soc_compr_components_open(cstream, &component);
 96         if (ret < 0)
 97                 goto machine_err;
 98 
 99         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
100                 ret = rtd->dai_link->compr_ops->startup(cstream);
101                 if (ret < 0) {
102                         dev_err(rtd->dev,
103                                 "Compress ASoC: %s startup failed: %d\n",
104                                 rtd->dai_link->name, ret);
105                         goto machine_err;
106                 }
107         }
108 
109         snd_soc_runtime_activate(rtd, cstream->direction);
110 
111         mutex_unlock(&rtd->pcm_mutex);
112 
113         return 0;
114 
115 machine_err:
116         soc_compr_components_free(cstream, component);
117 
118         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
119                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
120 out:
121         mutex_unlock(&rtd->pcm_mutex);
122         return ret;
123 }
124 
125 static int soc_compr_open_fe(struct snd_compr_stream *cstream)
126 {
127         struct snd_soc_pcm_runtime *fe = cstream->private_data;
128         struct snd_pcm_substream *fe_substream =
129                  fe->pcm->streams[cstream->direction].substream;
130         struct snd_soc_component *component;
131         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
132         struct snd_soc_dpcm *dpcm;
133         struct snd_soc_dapm_widget_list *list;
134         int stream;
135         int ret;
136 
137         if (cstream->direction == SND_COMPRESS_PLAYBACK)
138                 stream = SNDRV_PCM_STREAM_PLAYBACK;
139         else
140                 stream = SNDRV_PCM_STREAM_CAPTURE;
141 
142         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
143         fe->dpcm[stream].runtime = fe_substream->runtime;
144 
145         ret = dpcm_path_get(fe, stream, &list);
146         if (ret < 0)
147                 goto be_err;
148         else if (ret == 0)
149                 dev_dbg(fe->dev, "Compress ASoC: %s no valid %s route\n",
150                         fe->dai_link->name, stream ? "capture" : "playback");
151         /* calculate valid and active FE <-> BE dpcms */
152         dpcm_process_paths(fe, stream, &list, 1);
153         fe->dpcm[stream].runtime = fe_substream->runtime;
154 
155         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
156 
157         ret = dpcm_be_dai_startup(fe, stream);
158         if (ret < 0) {
159                 /* clean up all links */
160                 for_each_dpcm_be(fe, stream, dpcm)
161                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
162 
163                 dpcm_be_disconnect(fe, stream);
164                 fe->dpcm[stream].runtime = NULL;
165                 goto out;
166         }
167 
168         if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
169                 ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
170                 if (ret < 0) {
171                         dev_err(cpu_dai->dev,
172                                 "Compress ASoC: can't open interface %s: %d\n",
173                                 cpu_dai->name, ret);
174                         goto out;
175                 }
176         }
177 
178         ret = soc_compr_components_open(cstream, &component);
179         if (ret < 0)
180                 goto open_err;
181 
182         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
183                 ret = fe->dai_link->compr_ops->startup(cstream);
184                 if (ret < 0) {
185                         pr_err("Compress ASoC: %s startup failed: %d\n",
186                                fe->dai_link->name, ret);
187                         goto machine_err;
188                 }
189         }
190 
191         dpcm_clear_pending_state(fe, stream);
192         dpcm_path_put(&list);
193 
194         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
195         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
196 
197         snd_soc_runtime_activate(fe, stream);
198 
199         mutex_unlock(&fe->card->mutex);
200 
201         return 0;
202 
203 machine_err:
204         soc_compr_components_free(cstream, component);
205 open_err:
206         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
207                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
208 out:
209         dpcm_path_put(&list);
210 be_err:
211         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
212         mutex_unlock(&fe->card->mutex);
213         return ret;
214 }
215 
216 /*
217  * Power down the audio subsystem pmdown_time msecs after close is called.
218  * This is to ensure there are no pops or clicks in between any music tracks
219  * due to DAPM power cycling.
220  */
221 static void close_delayed_work(struct work_struct *work)
222 {
223         struct snd_soc_pcm_runtime *rtd =
224                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
225         struct snd_soc_dai *codec_dai = rtd->codec_dai;
226 
227         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
228 
229         dev_dbg(rtd->dev,
230                 "Compress ASoC: pop wq checking: %s status: %s waiting: %s\n",
231                 codec_dai->driver->playback.stream_name,
232                 codec_dai->playback_active ? "active" : "inactive",
233                 rtd->pop_wait ? "yes" : "no");
234 
235         /* are we waiting on this codec DAI stream */
236         if (rtd->pop_wait == 1) {
237                 rtd->pop_wait = 0;
238                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
239                                           SND_SOC_DAPM_STREAM_STOP);
240         }
241 
242         mutex_unlock(&rtd->pcm_mutex);
243 }
244 
245 static int soc_compr_free(struct snd_compr_stream *cstream)
246 {
247         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
248         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
249         struct snd_soc_dai *codec_dai = rtd->codec_dai;
250         int stream;
251 
252         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
253 
254         if (cstream->direction == SND_COMPRESS_PLAYBACK)
255                 stream = SNDRV_PCM_STREAM_PLAYBACK;
256         else
257                 stream = SNDRV_PCM_STREAM_CAPTURE;
258 
259         snd_soc_runtime_deactivate(rtd, stream);
260 
261         snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
262 
263         if (!cpu_dai->active)
264                 cpu_dai->rate = 0;
265 
266         if (!codec_dai->active)
267                 codec_dai->rate = 0;
268 
269         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
270                 rtd->dai_link->compr_ops->shutdown(cstream);
271 
272         soc_compr_components_free(cstream, NULL);
273 
274         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
275                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
276 
277         if (cstream->direction == SND_COMPRESS_PLAYBACK) {
278                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
279                         snd_soc_dapm_stream_event(rtd,
280                                                   SNDRV_PCM_STREAM_PLAYBACK,
281                                                   SND_SOC_DAPM_STREAM_STOP);
282                 } else {
283                         rtd->pop_wait = 1;
284                         queue_delayed_work(system_power_efficient_wq,
285                                            &rtd->delayed_work,
286                                            msecs_to_jiffies(rtd->pmdown_time));
287                 }
288         } else {
289                 /* capture streams can be powered down now */
290                 snd_soc_dapm_stream_event(rtd,
291                                           SNDRV_PCM_STREAM_CAPTURE,
292                                           SND_SOC_DAPM_STREAM_STOP);
293         }
294 
295         mutex_unlock(&rtd->pcm_mutex);
296         return 0;
297 }
298 
299 static int soc_compr_free_fe(struct snd_compr_stream *cstream)
300 {
301         struct snd_soc_pcm_runtime *fe = cstream->private_data;
302         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
303         struct snd_soc_dpcm *dpcm;
304         int stream, ret;
305 
306         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
307 
308         if (cstream->direction == SND_COMPRESS_PLAYBACK)
309                 stream = SNDRV_PCM_STREAM_PLAYBACK;
310         else
311                 stream = SNDRV_PCM_STREAM_CAPTURE;
312 
313         snd_soc_runtime_deactivate(fe, stream);
314 
315         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
316 
317         ret = dpcm_be_dai_hw_free(fe, stream);
318         if (ret < 0)
319                 dev_err(fe->dev, "Compressed ASoC: hw_free failed: %d\n", ret);
320 
321         ret = dpcm_be_dai_shutdown(fe, stream);
322 
323         /* mark FE's links ready to prune */
324         for_each_dpcm_be(fe, stream, dpcm)
325                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
326 
327         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
328 
329         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
330         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
331 
332         dpcm_be_disconnect(fe, stream);
333 
334         fe->dpcm[stream].runtime = NULL;
335 
336         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
337                 fe->dai_link->compr_ops->shutdown(cstream);
338 
339         soc_compr_components_free(cstream, NULL);
340 
341         if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
342                 cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
343 
344         mutex_unlock(&fe->card->mutex);
345         return 0;
346 }
347 
348 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
349 {
350 
351         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
352         struct snd_soc_component *component;
353         struct snd_soc_rtdcom_list *rtdcom;
354         struct snd_soc_dai *codec_dai = rtd->codec_dai;
355         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
356         int ret = 0, __ret;
357 
358         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
359 
360         for_each_rtdcom(rtd, rtdcom) {
361                 component = rtdcom->component;
362 
363                 if (!component->driver->compr_ops ||
364                     !component->driver->compr_ops->trigger)
365                         continue;
366 
367                 __ret = component->driver->compr_ops->trigger(cstream, cmd);
368                 if (__ret < 0)
369                         ret = __ret;
370         }
371         if (ret < 0)
372                 goto out;
373 
374         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
375                 cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
376 
377         switch (cmd) {
378         case SNDRV_PCM_TRIGGER_START:
379                 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
380                 break;
381         case SNDRV_PCM_TRIGGER_STOP:
382                 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
383                 break;
384         }
385 
386 out:
387         mutex_unlock(&rtd->pcm_mutex);
388         return ret;
389 }
390 
391 static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
392 {
393         struct snd_soc_pcm_runtime *fe = cstream->private_data;
394         struct snd_soc_component *component;
395         struct snd_soc_rtdcom_list *rtdcom;
396         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
397         int ret = 0, __ret, stream;
398 
399         if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
400                 cmd == SND_COMPR_TRIGGER_DRAIN) {
401 
402                 for_each_rtdcom(fe, rtdcom) {
403                         component = rtdcom->component;
404 
405                         if (!component->driver->compr_ops ||
406                             !component->driver->compr_ops->trigger)
407                                 continue;
408 
409                         __ret = component->driver->compr_ops->trigger(cstream, cmd);
410                         if (__ret < 0)
411                                 ret = __ret;
412                 }
413                 return ret;
414         }
415 
416         if (cstream->direction == SND_COMPRESS_PLAYBACK)
417                 stream = SNDRV_PCM_STREAM_PLAYBACK;
418         else
419                 stream = SNDRV_PCM_STREAM_CAPTURE;
420 
421         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
422 
423         if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
424                 ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
425                 if (ret < 0)
426                         goto out;
427         }
428 
429         for_each_rtdcom(fe, rtdcom) {
430                 component = rtdcom->component;
431 
432                 if (!component->driver->compr_ops ||
433                     !component->driver->compr_ops->trigger)
434                         continue;
435 
436                 __ret = component->driver->compr_ops->trigger(cstream, cmd);
437                 if (__ret < 0)
438                         ret = __ret;
439         }
440         if (ret < 0)
441                 goto out;
442 
443         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
444 
445         ret = dpcm_be_dai_trigger(fe, stream, cmd);
446 
447         switch (cmd) {
448         case SNDRV_PCM_TRIGGER_START:
449         case SNDRV_PCM_TRIGGER_RESUME:
450         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
451                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
452                 break;
453         case SNDRV_PCM_TRIGGER_STOP:
454         case SNDRV_PCM_TRIGGER_SUSPEND:
455                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
456                 break;
457         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
458                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
459                 break;
460         }
461 
462 out:
463         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
464         mutex_unlock(&fe->card->mutex);
465         return ret;
466 }
467 
468 static int soc_compr_set_params(struct snd_compr_stream *cstream,
469                                         struct snd_compr_params *params)
470 {
471         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
472         struct snd_soc_component *component;
473         struct snd_soc_rtdcom_list *rtdcom;
474         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
475         int ret = 0, __ret;
476 
477         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
478 
479         /*
480          * First we call set_params for the CPU DAI, then the component
481          * driver this should configure the SoC side. If the machine has
482          * compressed ops then we call that as well. The expectation is
483          * that these callbacks will configure everything for this compress
484          * path, like configuring a PCM port for a CODEC.
485          */
486         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
487                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
488                 if (ret < 0)
489                         goto err;
490         }
491 
492         for_each_rtdcom(rtd, rtdcom) {
493                 component = rtdcom->component;
494 
495                 if (!component->driver->compr_ops ||
496                     !component->driver->compr_ops->set_params)
497                         continue;
498 
499                 __ret = component->driver->compr_ops->set_params(cstream, params);
500                 if (__ret < 0)
501                         ret = __ret;
502         }
503         if (ret < 0)
504                 goto err;
505 
506         if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
507                 ret = rtd->dai_link->compr_ops->set_params(cstream);
508                 if (ret < 0)
509                         goto err;
510         }
511 
512         if (cstream->direction == SND_COMPRESS_PLAYBACK)
513                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
514                                           SND_SOC_DAPM_STREAM_START);
515         else
516                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
517                                           SND_SOC_DAPM_STREAM_START);
518 
519         /* cancel any delayed stream shutdown that is pending */
520         rtd->pop_wait = 0;
521         mutex_unlock(&rtd->pcm_mutex);
522 
523         cancel_delayed_work_sync(&rtd->delayed_work);
524 
525         return ret;
526 
527 err:
528         mutex_unlock(&rtd->pcm_mutex);
529         return ret;
530 }
531 
532 static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
533                                    struct snd_compr_params *params)
534 {
535         struct snd_soc_pcm_runtime *fe = cstream->private_data;
536         struct snd_pcm_substream *fe_substream =
537                  fe->pcm->streams[cstream->direction].substream;
538         struct snd_soc_component *component;
539         struct snd_soc_rtdcom_list *rtdcom;
540         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
541         int ret = 0, __ret, stream;
542 
543         if (cstream->direction == SND_COMPRESS_PLAYBACK)
544                 stream = SNDRV_PCM_STREAM_PLAYBACK;
545         else
546                 stream = SNDRV_PCM_STREAM_CAPTURE;
547 
548         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
549 
550         /*
551          * Create an empty hw_params for the BE as the machine driver must
552          * fix this up to match DSP decoder and ASRC configuration.
553          * I.e. machine driver fixup for compressed BE is mandatory.
554          */
555         memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
556                 sizeof(struct snd_pcm_hw_params));
557 
558         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
559 
560         ret = dpcm_be_dai_hw_params(fe, stream);
561         if (ret < 0)
562                 goto out;
563 
564         ret = dpcm_be_dai_prepare(fe, stream);
565         if (ret < 0)
566                 goto out;
567 
568         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
569                 ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
570                 if (ret < 0)
571                         goto out;
572         }
573 
574         for_each_rtdcom(fe, rtdcom) {
575                 component = rtdcom->component;
576 
577                 if (!component->driver->compr_ops ||
578                     !component->driver->compr_ops->set_params)
579                         continue;
580 
581                 __ret = component->driver->compr_ops->set_params(cstream, params);
582                 if (__ret < 0)
583                         ret = __ret;
584         }
585         if (ret < 0)
586                 goto out;
587 
588         if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
589                 ret = fe->dai_link->compr_ops->set_params(cstream);
590                 if (ret < 0)
591                         goto out;
592         }
593 
594         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
595         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
596 
597 out:
598         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
599         mutex_unlock(&fe->card->mutex);
600         return ret;
601 }
602 
603 static int soc_compr_get_params(struct snd_compr_stream *cstream,
604                                 struct snd_codec *params)
605 {
606         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
607         struct snd_soc_component *component;
608         struct snd_soc_rtdcom_list *rtdcom;
609         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
610         int ret = 0, __ret;
611 
612         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
613 
614         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
615                 ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
616                 if (ret < 0)
617                         goto err;
618         }
619 
620         for_each_rtdcom(rtd, rtdcom) {
621                 component = rtdcom->component;
622 
623                 if (!component->driver->compr_ops ||
624                     !component->driver->compr_ops->get_params)
625                         continue;
626 
627                 __ret = component->driver->compr_ops->get_params(cstream, params);
628                 if (__ret < 0)
629                         ret = __ret;
630         }
631 
632 err:
633         mutex_unlock(&rtd->pcm_mutex);
634         return ret;
635 }
636 
637 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
638                               struct snd_compr_caps *caps)
639 {
640         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
641         struct snd_soc_component *component;
642         struct snd_soc_rtdcom_list *rtdcom;
643         int ret = 0, __ret;
644 
645         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
646 
647         for_each_rtdcom(rtd, rtdcom) {
648                 component = rtdcom->component;
649 
650                 if (!component->driver->compr_ops ||
651                     !component->driver->compr_ops->get_caps)
652                         continue;
653 
654                 __ret = component->driver->compr_ops->get_caps(cstream, caps);
655                 if (__ret < 0)
656                         ret = __ret;
657         }
658 
659         mutex_unlock(&rtd->pcm_mutex);
660         return ret;
661 }
662 
663 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
664                                     struct snd_compr_codec_caps *codec)
665 {
666         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
667         struct snd_soc_component *component;
668         struct snd_soc_rtdcom_list *rtdcom;
669         int ret = 0, __ret;
670 
671         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
672 
673         for_each_rtdcom(rtd, rtdcom) {
674                 component = rtdcom->component;
675 
676                 if (!component->driver->compr_ops ||
677                     !component->driver->compr_ops->get_codec_caps)
678                         continue;
679 
680                 __ret = component->driver->compr_ops->get_codec_caps(cstream, codec);
681                 if (__ret < 0)
682                         ret = __ret;
683         }
684 
685         mutex_unlock(&rtd->pcm_mutex);
686         return ret;
687 }
688 
689 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
690 {
691         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
692         struct snd_soc_component *component;
693         struct snd_soc_rtdcom_list *rtdcom;
694         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
695         int ret = 0, __ret;
696 
697         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
698 
699         if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
700                 ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
701                 if (ret < 0)
702                         goto err;
703         }
704 
705         for_each_rtdcom(rtd, rtdcom) {
706                 component = rtdcom->component;
707 
708                 if (!component->driver->compr_ops ||
709                     !component->driver->compr_ops->ack)
710                         continue;
711 
712                 __ret = component->driver->compr_ops->ack(cstream, bytes);
713                 if (__ret < 0)
714                         ret = __ret;
715         }
716 
717 err:
718         mutex_unlock(&rtd->pcm_mutex);
719         return ret;
720 }
721 
722 static int soc_compr_pointer(struct snd_compr_stream *cstream,
723                              struct snd_compr_tstamp *tstamp)
724 {
725         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
726         struct snd_soc_component *component;
727         struct snd_soc_rtdcom_list *rtdcom;
728         int ret = 0, __ret;
729         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
730 
731         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
732 
733         if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
734                 cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
735 
736         for_each_rtdcom(rtd, rtdcom) {
737                 component = rtdcom->component;
738 
739                 if (!component->driver->compr_ops ||
740                     !component->driver->compr_ops->pointer)
741                         continue;
742 
743                 __ret = component->driver->compr_ops->pointer(cstream, tstamp);
744                 if (__ret < 0)
745                         ret = __ret;
746         }
747 
748         mutex_unlock(&rtd->pcm_mutex);
749         return ret;
750 }
751 
752 static int soc_compr_copy(struct snd_compr_stream *cstream,
753                           char __user *buf, size_t count)
754 {
755         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
756         struct snd_soc_component *component;
757         struct snd_soc_rtdcom_list *rtdcom;
758         int ret = 0;
759 
760         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
761 
762         for_each_rtdcom(rtd, rtdcom) {
763                 component = rtdcom->component;
764 
765                 if (!component->driver->compr_ops ||
766                     !component->driver->compr_ops->copy)
767                         continue;
768 
769                 ret = component->driver->compr_ops->copy(cstream, buf, count);
770                 break;
771         }
772 
773         mutex_unlock(&rtd->pcm_mutex);
774         return ret;
775 }
776 
777 static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
778                                   struct snd_compr_metadata *metadata)
779 {
780         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
781         struct snd_soc_component *component;
782         struct snd_soc_rtdcom_list *rtdcom;
783         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
784         int ret = 0, __ret;
785 
786         if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
787                 ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
788                 if (ret < 0)
789                         return ret;
790         }
791 
792         for_each_rtdcom(rtd, rtdcom) {
793                 component = rtdcom->component;
794 
795                 if (!component->driver->compr_ops ||
796                     !component->driver->compr_ops->set_metadata)
797                         continue;
798 
799                 __ret = component->driver->compr_ops->set_metadata(cstream, metadata);
800                 if (__ret < 0)
801                         ret = __ret;
802         }
803 
804         return ret;
805 }
806 
807 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
808                                   struct snd_compr_metadata *metadata)
809 {
810         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
811         struct snd_soc_component *component;
812         struct snd_soc_rtdcom_list *rtdcom;
813         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
814         int ret = 0, __ret;
815 
816         if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
817                 ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
818                 if (ret < 0)
819                         return ret;
820         }
821 
822         for_each_rtdcom(rtd, rtdcom) {
823                 component = rtdcom->component;
824 
825                 if (!component->driver->compr_ops ||
826                     !component->driver->compr_ops->get_metadata)
827                         continue;
828 
829                 __ret = component->driver->compr_ops->get_metadata(cstream, metadata);
830                 if (__ret < 0)
831                         ret = __ret;
832         }
833 
834         return ret;
835 }
836 
837 /* ASoC Compress operations */
838 static struct snd_compr_ops soc_compr_ops = {
839         .open           = soc_compr_open,
840         .free           = soc_compr_free,
841         .set_params     = soc_compr_set_params,
842         .set_metadata   = soc_compr_set_metadata,
843         .get_metadata   = soc_compr_get_metadata,
844         .get_params     = soc_compr_get_params,
845         .trigger        = soc_compr_trigger,
846         .pointer        = soc_compr_pointer,
847         .ack            = soc_compr_ack,
848         .get_caps       = soc_compr_get_caps,
849         .get_codec_caps = soc_compr_get_codec_caps
850 };
851 
852 /* ASoC Dynamic Compress operations */
853 static struct snd_compr_ops soc_compr_dyn_ops = {
854         .open           = soc_compr_open_fe,
855         .free           = soc_compr_free_fe,
856         .set_params     = soc_compr_set_params_fe,
857         .get_params     = soc_compr_get_params,
858         .set_metadata   = soc_compr_set_metadata,
859         .get_metadata   = soc_compr_get_metadata,
860         .trigger        = soc_compr_trigger_fe,
861         .pointer        = soc_compr_pointer,
862         .ack            = soc_compr_ack,
863         .get_caps       = soc_compr_get_caps,
864         .get_codec_caps = soc_compr_get_codec_caps
865 };
866 
867 /**
868  * snd_soc_new_compress - create a new compress.
869  *
870  * @rtd: The runtime for which we will create compress
871  * @num: the device index number (zero based - shared with normal PCMs)
872  *
873  * Return: 0 for success, else error.
874  */
875 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
876 {
877         struct snd_soc_component *component;
878         struct snd_soc_rtdcom_list *rtdcom;
879         struct snd_soc_dai *codec_dai = rtd->codec_dai;
880         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
881         struct snd_compr *compr;
882         struct snd_pcm *be_pcm;
883         char new_name[64];
884         int ret = 0, direction = 0;
885         int playback = 0, capture = 0;
886 
887         if (rtd->num_codecs > 1) {
888                 dev_err(rtd->card->dev,
889                         "Compress ASoC: Multicodec not supported\n");
890                 return -EINVAL;
891         }
892 
893         /* check client and interface hw capabilities */
894         if (codec_dai->driver->playback.channels_min)
895                 playback = 1;
896         if (codec_dai->driver->capture.channels_min)
897                 capture = 1;
898 
899         capture = capture && cpu_dai->driver->capture.channels_min;
900         playback = playback && cpu_dai->driver->playback.channels_min;
901 
902         /*
903          * Compress devices are unidirectional so only one of the directions
904          * should be set, check for that (xor)
905          */
906         if (playback + capture != 1) {
907                 dev_err(rtd->card->dev,
908                         "Compress ASoC: Invalid direction for P %d, C %d\n",
909                         playback, capture);
910                 return -EINVAL;
911         }
912 
913         if (playback)
914                 direction = SND_COMPRESS_PLAYBACK;
915         else
916                 direction = SND_COMPRESS_CAPTURE;
917 
918         compr = kzalloc(sizeof(*compr), GFP_KERNEL);
919         if (!compr)
920                 return -ENOMEM;
921 
922         compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
923                                   GFP_KERNEL);
924         if (!compr->ops) {
925                 ret = -ENOMEM;
926                 goto compr_err;
927         }
928 
929         if (rtd->dai_link->dynamic) {
930                 snprintf(new_name, sizeof(new_name), "(%s)",
931                         rtd->dai_link->stream_name);
932 
933                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
934                                 rtd->dai_link->dpcm_playback,
935                                 rtd->dai_link->dpcm_capture, &be_pcm);
936                 if (ret < 0) {
937                         dev_err(rtd->card->dev,
938                                 "Compress ASoC: can't create compressed for %s: %d\n",
939                                 rtd->dai_link->name, ret);
940                         goto compr_err;
941                 }
942 
943                 rtd->pcm = be_pcm;
944                 rtd->fe_compr = 1;
945                 if (rtd->dai_link->dpcm_playback)
946                         be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
947                 else if (rtd->dai_link->dpcm_capture)
948                         be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
949                 memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
950         } else {
951                 snprintf(new_name, sizeof(new_name), "%s %s-%d",
952                         rtd->dai_link->stream_name, codec_dai->name, num);
953 
954                 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
955         }
956 
957         for_each_rtdcom(rtd, rtdcom) {
958                 component = rtdcom->component;
959 
960                 if (!component->driver->compr_ops ||
961                     !component->driver->compr_ops->copy)
962                         continue;
963 
964                 compr->ops->copy = soc_compr_copy;
965                 break;
966         }
967 
968         mutex_init(&compr->lock);
969         ret = snd_compress_new(rtd->card->snd_card, num, direction,
970                                 new_name, compr);
971         if (ret < 0) {
972                 component = rtd->codec_dai->component;
973                 dev_err(component->dev,
974                         "Compress ASoC: can't create compress for codec %s: %d\n",
975                         component->name, ret);
976                 goto compr_err;
977         }
978 
979         /* DAPM dai link stream work */
980         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
981 
982         rtd->compr = compr;
983         compr->private_data = rtd;
984 
985         dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
986                  codec_dai->name, cpu_dai->name);
987         return ret;
988 
989 compr_err:
990         kfree(compr);
991         return ret;
992 }
993 EXPORT_SYMBOL_GPL(snd_soc_new_compress);
994 

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