2 * soc-compress.c -- ALSA SoC Compress
4 * Copyright (C) 2012 Intel Corp.
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>
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.
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>
28 static int soc_compr_open(struct snd_compr_stream *cstream)
30 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
31 struct snd_soc_platform *platform = rtd->platform;
32 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
33 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
38 if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
39 ret = platform->driver->compr_ops->open(cstream);
41 pr_err("compress asoc: can't open platform %s\n", platform->name);
46 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
47 ret = rtd->dai_link->compr_ops->startup(cstream);
49 pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
54 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
55 cpu_dai->playback_active++;
56 codec_dai->playback_active++;
58 cpu_dai->capture_active++;
59 codec_dai->capture_active++;
66 mutex_unlock(&rtd->pcm_mutex);
71 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
72 platform->driver->compr_ops->free(cstream);
74 mutex_unlock(&rtd->pcm_mutex);
79 * Power down the audio subsystem pmdown_time msecs after close is called.
80 * This is to ensure there are no pops or clicks in between any music tracks
81 * due to DAPM power cycling.
83 static void close_delayed_work(struct work_struct *work)
85 struct snd_soc_pcm_runtime *rtd =
86 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
87 struct snd_soc_dai *codec_dai = rtd->codec_dai;
89 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
91 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
92 codec_dai->driver->playback.stream_name,
93 codec_dai->playback_active ? "active" : "inactive",
94 rtd->pop_wait ? "yes" : "no");
96 /* are we waiting on this codec DAI stream */
97 if (rtd->pop_wait == 1) {
99 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
100 SND_SOC_DAPM_STREAM_STOP);
103 mutex_unlock(&rtd->pcm_mutex);
106 static int soc_compr_free(struct snd_compr_stream *cstream)
108 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
109 struct snd_soc_platform *platform = rtd->platform;
110 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
111 struct snd_soc_dai *codec_dai = rtd->codec_dai;
112 struct snd_soc_codec *codec = rtd->codec;
114 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
116 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
117 cpu_dai->playback_active--;
118 codec_dai->playback_active--;
120 cpu_dai->capture_active--;
121 codec_dai->capture_active--;
124 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
130 if (!cpu_dai->active)
133 if (!codec_dai->active)
137 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
138 rtd->dai_link->compr_ops->shutdown(cstream);
140 if (platform->driver->compr_ops && platform->driver->compr_ops->free)
141 platform->driver->compr_ops->free(cstream);
142 cpu_dai->runtime = NULL;
144 if (cstream->direction == SND_COMPRESS_PLAYBACK) {
145 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
146 rtd->dai_link->ignore_pmdown_time) {
147 snd_soc_dapm_stream_event(rtd,
148 SNDRV_PCM_STREAM_PLAYBACK,
149 SND_SOC_DAPM_STREAM_STOP);
152 schedule_delayed_work(&rtd->delayed_work,
153 msecs_to_jiffies(rtd->pmdown_time));
156 /* capture streams can be powered down now */
157 snd_soc_dapm_stream_event(rtd,
158 SNDRV_PCM_STREAM_CAPTURE,
159 SND_SOC_DAPM_STREAM_STOP);
162 mutex_unlock(&rtd->pcm_mutex);
166 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
169 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
170 struct snd_soc_platform *platform = rtd->platform;
171 struct snd_soc_dai *codec_dai = rtd->codec_dai;
174 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
176 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
177 ret = platform->driver->compr_ops->trigger(cstream, cmd);
183 case SNDRV_PCM_TRIGGER_START:
184 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
186 case SNDRV_PCM_TRIGGER_STOP:
187 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
192 mutex_unlock(&rtd->pcm_mutex);
196 static int soc_compr_set_params(struct snd_compr_stream *cstream,
197 struct snd_compr_params *params)
199 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
200 struct snd_soc_platform *platform = rtd->platform;
203 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
205 /* first we call set_params for the platform driver
206 * this should configure the soc side
207 * if the machine has compressed ops then we call that as well
208 * expectation is that platform and machine will configure everything
209 * for this compress path, like configuring pcm port for codec
211 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
212 ret = platform->driver->compr_ops->set_params(cstream, params);
217 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
218 ret = rtd->dai_link->compr_ops->set_params(cstream);
223 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
224 SND_SOC_DAPM_STREAM_START);
226 /* cancel any delayed stream shutdown that is pending */
228 mutex_unlock(&rtd->pcm_mutex);
230 cancel_delayed_work_sync(&rtd->delayed_work);
235 mutex_unlock(&rtd->pcm_mutex);
239 static int soc_compr_get_params(struct snd_compr_stream *cstream,
240 struct snd_codec *params)
242 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
243 struct snd_soc_platform *platform = rtd->platform;
246 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
248 if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
249 ret = platform->driver->compr_ops->get_params(cstream, params);
251 mutex_unlock(&rtd->pcm_mutex);
255 static int soc_compr_get_caps(struct snd_compr_stream *cstream,
256 struct snd_compr_caps *caps)
258 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
259 struct snd_soc_platform *platform = rtd->platform;
262 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
264 if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
265 ret = platform->driver->compr_ops->get_caps(cstream, caps);
267 mutex_unlock(&rtd->pcm_mutex);
271 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
272 struct snd_compr_codec_caps *codec)
274 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
275 struct snd_soc_platform *platform = rtd->platform;
278 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
280 if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
281 ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
283 mutex_unlock(&rtd->pcm_mutex);
287 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
289 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
290 struct snd_soc_platform *platform = rtd->platform;
293 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
295 if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
296 ret = platform->driver->compr_ops->ack(cstream, bytes);
298 mutex_unlock(&rtd->pcm_mutex);
302 static int soc_compr_pointer(struct snd_compr_stream *cstream,
303 struct snd_compr_tstamp *tstamp)
305 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
306 struct snd_soc_platform *platform = rtd->platform;
308 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
310 if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
311 platform->driver->compr_ops->pointer(cstream, tstamp);
313 mutex_unlock(&rtd->pcm_mutex);
317 static int soc_compr_copy(struct snd_compr_stream *cstream,
318 char __user *buf, size_t count)
320 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
321 struct snd_soc_platform *platform = rtd->platform;
324 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
326 if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
327 ret = platform->driver->compr_ops->copy(cstream, buf, count);
329 mutex_unlock(&rtd->pcm_mutex);
333 static int sst_compr_set_metadata(struct snd_compr_stream *cstream,
334 struct snd_compr_metadata *metadata)
336 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
337 struct snd_soc_platform *platform = rtd->platform;
340 if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata)
341 ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
346 static int sst_compr_get_metadata(struct snd_compr_stream *cstream,
347 struct snd_compr_metadata *metadata)
349 struct snd_soc_pcm_runtime *rtd = cstream->private_data;
350 struct snd_soc_platform *platform = rtd->platform;
353 if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata)
354 ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
358 /* ASoC Compress operations */
359 static struct snd_compr_ops soc_compr_ops = {
360 .open = soc_compr_open,
361 .free = soc_compr_free,
362 .set_params = soc_compr_set_params,
363 .set_metadata = sst_compr_set_metadata,
364 .get_metadata = sst_compr_get_metadata,
365 .get_params = soc_compr_get_params,
366 .trigger = soc_compr_trigger,
367 .pointer = soc_compr_pointer,
368 .ack = soc_compr_ack,
369 .get_caps = soc_compr_get_caps,
370 .get_codec_caps = soc_compr_get_codec_caps
373 /* create a new compress */
374 int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
376 struct snd_soc_codec *codec = rtd->codec;
377 struct snd_soc_platform *platform = rtd->platform;
378 struct snd_soc_dai *codec_dai = rtd->codec_dai;
379 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
380 struct snd_compr *compr;
382 int ret = 0, direction = 0;
384 /* check client and interface hw capabilities */
385 snprintf(new_name, sizeof(new_name), "%s %s-%d",
386 rtd->dai_link->stream_name, codec_dai->name, num);
388 if (codec_dai->driver->playback.channels_min)
389 direction = SND_COMPRESS_PLAYBACK;
390 else if (codec_dai->driver->capture.channels_min)
391 direction = SND_COMPRESS_CAPTURE;
395 compr = kzalloc(sizeof(*compr), GFP_KERNEL);
397 snd_printk(KERN_ERR "Cannot allocate compr\n");
401 compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
403 if (compr->ops == NULL) {
404 dev_err(rtd->card->dev, "Cannot allocate compressed ops\n");
408 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
410 /* Add copy callback for not memory mapped DSPs */
411 if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
412 compr->ops->copy = soc_compr_copy;
414 mutex_init(&compr->lock);
415 ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
417 pr_err("compress asoc: can't create compress for codec %s\n",
422 /* DAPM dai link stream work */
423 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
426 compr->private_data = rtd;
428 printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,