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 28 static int soc_compr_open(struct snd_compr_stream *cstream) 29 { 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; 34 int ret = 0; 35 36 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 37 38 if (platform->driver->compr_ops && platform->driver->compr_ops->open) { 39 ret = platform->driver->compr_ops->open(cstream); 40 if (ret < 0) { 41 pr_err("compress asoc: can't open platform %s\n", platform->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 if (cstream->direction == SND_COMPRESS_PLAYBACK) { 55 cpu_dai->playback_active++; 56 codec_dai->playback_active++; 57 } else { 58 cpu_dai->capture_active++; 59 codec_dai->capture_active++; 60 } 61 62 cpu_dai->active++; 63 codec_dai->active++; 64 rtd->codec->active++; 65 66 mutex_unlock(&rtd->pcm_mutex); 67 68 return 0; 69 70 machine_err: 71 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 72 platform->driver->compr_ops->free(cstream); 73 out: 74 mutex_unlock(&rtd->pcm_mutex); 75 return ret; 76 } 77 78 /* 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. 82 */ 83 static void close_delayed_work(struct work_struct *work) 84 { 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; 88 89 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 90 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"); 95 96 /* are we waiting on this codec DAI stream */ 97 if (rtd->pop_wait == 1) { 98 rtd->pop_wait = 0; 99 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 100 SND_SOC_DAPM_STREAM_STOP); 101 } 102 103 mutex_unlock(&rtd->pcm_mutex); 104 } 105 106 static int soc_compr_free(struct snd_compr_stream *cstream) 107 { 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; 113 114 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 115 116 if (cstream->direction == SND_COMPRESS_PLAYBACK) { 117 cpu_dai->playback_active--; 118 codec_dai->playback_active--; 119 } else { 120 cpu_dai->capture_active--; 121 codec_dai->capture_active--; 122 } 123 124 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); 125 126 cpu_dai->active--; 127 codec_dai->active--; 128 codec->active--; 129 130 if (!cpu_dai->active) 131 cpu_dai->rate = 0; 132 133 if (!codec_dai->active) 134 codec_dai->rate = 0; 135 136 137 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown) 138 rtd->dai_link->compr_ops->shutdown(cstream); 139 140 if (platform->driver->compr_ops && platform->driver->compr_ops->free) 141 platform->driver->compr_ops->free(cstream); 142 cpu_dai->runtime = NULL; 143 144 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); 150 } else { 151 rtd->pop_wait = 1; 152 queue_delayed_work(system_power_efficient_wq, 153 &rtd->delayed_work, 154 msecs_to_jiffies(rtd->pmdown_time)); 155 } 156 } else { 157 /* capture streams can be powered down now */ 158 snd_soc_dapm_stream_event(rtd, 159 SNDRV_PCM_STREAM_CAPTURE, 160 SND_SOC_DAPM_STREAM_STOP); 161 } 162 163 mutex_unlock(&rtd->pcm_mutex); 164 return 0; 165 } 166 167 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd) 168 { 169 170 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 171 struct snd_soc_platform *platform = rtd->platform; 172 struct snd_soc_dai *codec_dai = rtd->codec_dai; 173 int ret = 0; 174 175 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 176 177 if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { 178 ret = platform->driver->compr_ops->trigger(cstream, cmd); 179 if (ret < 0) 180 goto out; 181 } 182 183 switch (cmd) { 184 case SNDRV_PCM_TRIGGER_START: 185 snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction); 186 break; 187 case SNDRV_PCM_TRIGGER_STOP: 188 snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); 189 break; 190 } 191 192 out: 193 mutex_unlock(&rtd->pcm_mutex); 194 return ret; 195 } 196 197 static int soc_compr_set_params(struct snd_compr_stream *cstream, 198 struct snd_compr_params *params) 199 { 200 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 201 struct snd_soc_platform *platform = rtd->platform; 202 int ret = 0; 203 204 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 205 206 /* first we call set_params for the platform driver 207 * this should configure the soc side 208 * if the machine has compressed ops then we call that as well 209 * expectation is that platform and machine will configure everything 210 * for this compress path, like configuring pcm port for codec 211 */ 212 if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { 213 ret = platform->driver->compr_ops->set_params(cstream, params); 214 if (ret < 0) 215 goto err; 216 } 217 218 if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) { 219 ret = rtd->dai_link->compr_ops->set_params(cstream); 220 if (ret < 0) 221 goto err; 222 } 223 224 if (cstream->direction == SND_COMPRESS_PLAYBACK) 225 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, 226 SND_SOC_DAPM_STREAM_START); 227 else 228 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, 229 SND_SOC_DAPM_STREAM_START); 230 231 /* cancel any delayed stream shutdown that is pending */ 232 rtd->pop_wait = 0; 233 mutex_unlock(&rtd->pcm_mutex); 234 235 cancel_delayed_work_sync(&rtd->delayed_work); 236 237 return ret; 238 239 err: 240 mutex_unlock(&rtd->pcm_mutex); 241 return ret; 242 } 243 244 static int soc_compr_get_params(struct snd_compr_stream *cstream, 245 struct snd_codec *params) 246 { 247 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 248 struct snd_soc_platform *platform = rtd->platform; 249 int ret = 0; 250 251 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 252 253 if (platform->driver->compr_ops && platform->driver->compr_ops->get_params) 254 ret = platform->driver->compr_ops->get_params(cstream, params); 255 256 mutex_unlock(&rtd->pcm_mutex); 257 return ret; 258 } 259 260 static int soc_compr_get_caps(struct snd_compr_stream *cstream, 261 struct snd_compr_caps *caps) 262 { 263 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 264 struct snd_soc_platform *platform = rtd->platform; 265 int ret = 0; 266 267 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 268 269 if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps) 270 ret = platform->driver->compr_ops->get_caps(cstream, caps); 271 272 mutex_unlock(&rtd->pcm_mutex); 273 return ret; 274 } 275 276 static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream, 277 struct snd_compr_codec_caps *codec) 278 { 279 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 280 struct snd_soc_platform *platform = rtd->platform; 281 int ret = 0; 282 283 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 284 285 if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps) 286 ret = platform->driver->compr_ops->get_codec_caps(cstream, codec); 287 288 mutex_unlock(&rtd->pcm_mutex); 289 return ret; 290 } 291 292 static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes) 293 { 294 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 295 struct snd_soc_platform *platform = rtd->platform; 296 int ret = 0; 297 298 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 299 300 if (platform->driver->compr_ops && platform->driver->compr_ops->ack) 301 ret = platform->driver->compr_ops->ack(cstream, bytes); 302 303 mutex_unlock(&rtd->pcm_mutex); 304 return ret; 305 } 306 307 static int soc_compr_pointer(struct snd_compr_stream *cstream, 308 struct snd_compr_tstamp *tstamp) 309 { 310 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 311 struct snd_soc_platform *platform = rtd->platform; 312 313 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 314 315 if (platform->driver->compr_ops && platform->driver->compr_ops->pointer) 316 platform->driver->compr_ops->pointer(cstream, tstamp); 317 318 mutex_unlock(&rtd->pcm_mutex); 319 return 0; 320 } 321 322 static int soc_compr_copy(struct snd_compr_stream *cstream, 323 char __user *buf, size_t count) 324 { 325 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 326 struct snd_soc_platform *platform = rtd->platform; 327 int ret = 0; 328 329 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); 330 331 if (platform->driver->compr_ops && platform->driver->compr_ops->copy) 332 ret = platform->driver->compr_ops->copy(cstream, buf, count); 333 334 mutex_unlock(&rtd->pcm_mutex); 335 return ret; 336 } 337 338 static int soc_compr_set_metadata(struct snd_compr_stream *cstream, 339 struct snd_compr_metadata *metadata) 340 { 341 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 342 struct snd_soc_platform *platform = rtd->platform; 343 int ret = 0; 344 345 if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata) 346 ret = platform->driver->compr_ops->set_metadata(cstream, metadata); 347 348 return ret; 349 } 350 351 static int soc_compr_get_metadata(struct snd_compr_stream *cstream, 352 struct snd_compr_metadata *metadata) 353 { 354 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 355 struct snd_soc_platform *platform = rtd->platform; 356 int ret = 0; 357 358 if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata) 359 ret = platform->driver->compr_ops->get_metadata(cstream, metadata); 360 361 return ret; 362 } 363 /* ASoC Compress operations */ 364 static struct snd_compr_ops soc_compr_ops = { 365 .open = soc_compr_open, 366 .free = soc_compr_free, 367 .set_params = soc_compr_set_params, 368 .set_metadata = soc_compr_set_metadata, 369 .get_metadata = soc_compr_get_metadata, 370 .get_params = soc_compr_get_params, 371 .trigger = soc_compr_trigger, 372 .pointer = soc_compr_pointer, 373 .ack = soc_compr_ack, 374 .get_caps = soc_compr_get_caps, 375 .get_codec_caps = soc_compr_get_codec_caps 376 }; 377 378 /* create a new compress */ 379 int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) 380 { 381 struct snd_soc_codec *codec = rtd->codec; 382 struct snd_soc_platform *platform = rtd->platform; 383 struct snd_soc_dai *codec_dai = rtd->codec_dai; 384 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 385 struct snd_compr *compr; 386 char new_name[64]; 387 int ret = 0, direction = 0; 388 389 /* check client and interface hw capabilities */ 390 snprintf(new_name, sizeof(new_name), "%s %s-%d", 391 rtd->dai_link->stream_name, codec_dai->name, num); 392 393 if (codec_dai->driver->playback.channels_min) 394 direction = SND_COMPRESS_PLAYBACK; 395 else if (codec_dai->driver->capture.channels_min) 396 direction = SND_COMPRESS_CAPTURE; 397 else 398 return -EINVAL; 399 400 compr = kzalloc(sizeof(*compr), GFP_KERNEL); 401 if (compr == NULL) { 402 snd_printk(KERN_ERR "Cannot allocate compr\n"); 403 return -ENOMEM; 404 } 405 406 compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops), 407 GFP_KERNEL); 408 if (compr->ops == NULL) { 409 dev_err(rtd->card->dev, "Cannot allocate compressed ops\n"); 410 ret = -ENOMEM; 411 goto compr_err; 412 } 413 memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops)); 414 415 /* Add copy callback for not memory mapped DSPs */ 416 if (platform->driver->compr_ops && platform->driver->compr_ops->copy) 417 compr->ops->copy = soc_compr_copy; 418 419 mutex_init(&compr->lock); 420 ret = snd_compress_new(rtd->card->snd_card, num, direction, compr); 421 if (ret < 0) { 422 pr_err("compress asoc: can't create compress for codec %s\n", 423 codec->name); 424 goto compr_err; 425 } 426 427 /* DAPM dai link stream work */ 428 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); 429 430 rtd->compr = compr; 431 compr->private_data = rtd; 432 433 printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name, 434 cpu_dai->name); 435 return ret; 436 437 compr_err: 438 kfree(compr); 439 return ret; 440 } 441