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 static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd) 31 { 32 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 33 } 34 35 static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd) 36 { 37 mutex_unlock(&rtd->card->pcm_mutex); 38 } 39 40 #define snd_soc_dpcm_mutex_assert_held(rtd) \ 41 lockdep_assert_held(&(rtd)->card->pcm_mutex) 42 43 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 44 int stream) 45 { 46 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 47 } 48 49 #define snd_soc_dpcm_stream_lock_irqsave(rtd, stream, flags) \ 50 snd_pcm_stream_lock_irqsave(snd_soc_dpcm_get_substream(rtd, stream), flags) 51 52 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 53 int stream) 54 { 55 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 56 } 57 58 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 59 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 60 61 #define DPCM_MAX_BE_USERS 8 62 63 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 64 { 65 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 66 } 67 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 68 { 69 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 70 } 71 72 #ifdef CONFIG_DEBUG_FS 73 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 74 { 75 switch (state) { 76 case SND_SOC_DPCM_STATE_NEW: 77 return "new"; 78 case SND_SOC_DPCM_STATE_OPEN: 79 return "open"; 80 case SND_SOC_DPCM_STATE_HW_PARAMS: 81 return "hw_params"; 82 case SND_SOC_DPCM_STATE_PREPARE: 83 return "prepare"; 84 case SND_SOC_DPCM_STATE_START: 85 return "start"; 86 case SND_SOC_DPCM_STATE_STOP: 87 return "stop"; 88 case SND_SOC_DPCM_STATE_SUSPEND: 89 return "suspend"; 90 case SND_SOC_DPCM_STATE_PAUSED: 91 return "paused"; 92 case SND_SOC_DPCM_STATE_HW_FREE: 93 return "hw_free"; 94 case SND_SOC_DPCM_STATE_CLOSE: 95 return "close"; 96 } 97 98 return "unknown"; 99 } 100 101 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 102 int stream, char *buf, size_t size) 103 { 104 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 105 struct snd_soc_dpcm *dpcm; 106 ssize_t offset = 0; 107 108 /* FE state */ 109 offset += scnprintf(buf + offset, size - offset, 110 "[%s - %s]\n", fe->dai_link->name, 111 stream ? "Capture" : "Playback"); 112 113 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 114 dpcm_state_string(fe->dpcm[stream].state)); 115 116 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 117 (fe->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 /* BEs state */ 126 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 127 128 if (list_empty(&fe->dpcm[stream].be_clients)) { 129 offset += scnprintf(buf + offset, size - offset, 130 " No active DSP links\n"); 131 goto out; 132 } 133 134 for_each_dpcm_be(fe, stream, dpcm) { 135 struct snd_soc_pcm_runtime *be = dpcm->be; 136 params = &dpcm->hw_params; 137 138 offset += scnprintf(buf + offset, size - offset, 139 "- %s\n", be->dai_link->name); 140 141 offset += scnprintf(buf + offset, size - offset, 142 " State: %s\n", 143 dpcm_state_string(be->dpcm[stream].state)); 144 145 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 146 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 147 offset += scnprintf(buf + offset, size - offset, 148 " Hardware Params: " 149 "Format = %s, Channels = %d, Rate = %d\n", 150 snd_pcm_format_name(params_format(params)), 151 params_channels(params), 152 params_rate(params)); 153 } 154 out: 155 return offset; 156 } 157 158 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 159 size_t count, loff_t *ppos) 160 { 161 struct snd_soc_pcm_runtime *fe = file->private_data; 162 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 163 int stream; 164 char *buf; 165 166 if (fe->num_cpus > 1) { 167 dev_err(fe->dev, 168 "%s doesn't support Multi CPU yet\n", __func__); 169 return -EINVAL; 170 } 171 172 buf = kmalloc(out_count, GFP_KERNEL); 173 if (!buf) 174 return -ENOMEM; 175 176 snd_soc_dpcm_mutex_lock(fe); 177 for_each_pcm_streams(stream) 178 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 179 offset += dpcm_show_state(fe, stream, 180 buf + offset, 181 out_count - offset); 182 snd_soc_dpcm_mutex_unlock(fe); 183 184 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 185 186 kfree(buf); 187 return ret; 188 } 189 190 static const struct file_operations dpcm_state_fops = { 191 .open = simple_open, 192 .read = dpcm_state_read_file, 193 .llseek = default_llseek, 194 }; 195 196 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 197 { 198 if (!rtd->dai_link->dynamic) 199 return; 200 201 if (!rtd->card->debugfs_card_root) 202 return; 203 204 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 205 rtd->card->debugfs_card_root); 206 207 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 208 rtd, &dpcm_state_fops); 209 } 210 211 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 212 { 213 char *name; 214 215 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 216 stream ? "capture" : "playback"); 217 if (name) { 218 dpcm->debugfs_state = debugfs_create_dir( 219 name, dpcm->fe->debugfs_dpcm_root); 220 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 221 &dpcm->state); 222 kfree(name); 223 } 224 } 225 226 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 227 { 228 debugfs_remove_recursive(dpcm->debugfs_state); 229 } 230 231 #else 232 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 233 int stream) 234 { 235 } 236 237 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 238 { 239 } 240 #endif 241 242 /* Set FE's runtime_update state; the state is protected via PCM stream lock 243 * for avoiding the race with trigger callback. 244 * If the state is unset and a trigger is pending while the previous operation, 245 * process the pending trigger action here. 246 */ 247 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 248 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 249 int stream, enum snd_soc_dpcm_update state) 250 { 251 struct snd_pcm_substream *substream = 252 snd_soc_dpcm_get_substream(fe, stream); 253 254 snd_soc_dpcm_stream_lock_irq(fe, stream); 255 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 256 dpcm_fe_dai_do_trigger(substream, 257 fe->dpcm[stream].trigger_pending - 1); 258 fe->dpcm[stream].trigger_pending = 0; 259 } 260 fe->dpcm[stream].runtime_update = state; 261 snd_soc_dpcm_stream_unlock_irq(fe, stream); 262 } 263 264 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 265 int stream, enum snd_soc_dpcm_update state) 266 { 267 be->dpcm[stream].runtime_update = state; 268 } 269 270 /** 271 * snd_soc_runtime_action() - Increment/Decrement active count for 272 * PCM runtime components 273 * @rtd: ASoC PCM runtime that is activated 274 * @stream: Direction of the PCM stream 275 * @action: Activate stream if 1. Deactivate if -1. 276 * 277 * Increments/Decrements the active count for all the DAIs and components 278 * attached to a PCM runtime. 279 * Should typically be called when a stream is opened. 280 * 281 * Must be called with the rtd->card->pcm_mutex being held 282 */ 283 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 284 int stream, int action) 285 { 286 struct snd_soc_dai *dai; 287 int i; 288 289 snd_soc_dpcm_mutex_assert_held(rtd); 290 291 for_each_rtd_dais(rtd, i, dai) 292 snd_soc_dai_action(dai, stream, action); 293 } 294 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 295 296 /** 297 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 298 * @rtd: The ASoC PCM runtime that should be checked. 299 * 300 * This function checks whether the power down delay should be ignored for a 301 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 302 * been configured to ignore the delay, or if none of the components benefits 303 * from having the delay. 304 */ 305 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 306 { 307 struct snd_soc_component *component; 308 bool ignore = true; 309 int i; 310 311 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 312 return true; 313 314 for_each_rtd_components(rtd, i, component) 315 ignore &= !component->driver->use_pmdown_time; 316 317 return ignore; 318 } 319 320 /** 321 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 322 * @substream: the pcm substream 323 * @hw: the hardware parameters 324 * 325 * Sets the substream runtime hardware parameters. 326 */ 327 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 328 const struct snd_pcm_hardware *hw) 329 { 330 substream->runtime->hw = *hw; 331 332 return 0; 333 } 334 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 335 336 /* DPCM stream event, send event to FE and all active BEs. */ 337 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 338 int event) 339 { 340 struct snd_soc_dpcm *dpcm; 341 342 snd_soc_dpcm_mutex_assert_held(fe); 343 344 for_each_dpcm_be(fe, dir, dpcm) { 345 346 struct snd_soc_pcm_runtime *be = dpcm->be; 347 348 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 349 be->dai_link->name, event, dir); 350 351 if ((event == SND_SOC_DAPM_STREAM_STOP) && 352 (be->dpcm[dir].users >= 1)) 353 continue; 354 355 snd_soc_dapm_stream_event(be, dir, event); 356 } 357 358 snd_soc_dapm_stream_event(fe, dir, event); 359 360 return 0; 361 } 362 363 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 364 struct snd_pcm_hw_params *params) 365 { 366 if (params) { 367 dai->rate = params_rate(params); 368 dai->channels = params_channels(params); 369 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 370 } else { 371 dai->rate = 0; 372 dai->channels = 0; 373 dai->sample_bits = 0; 374 } 375 } 376 377 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 378 struct snd_soc_dai *soc_dai) 379 { 380 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 381 int ret; 382 383 if (!snd_soc_dai_active(soc_dai)) 384 return 0; 385 386 #define __soc_pcm_apply_symmetry(name, NAME) \ 387 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 388 rtd->dai_link->symmetric_##name)) { \ 389 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 390 #name, soc_dai->name); \ 391 \ 392 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 393 SNDRV_PCM_HW_PARAM_##NAME,\ 394 soc_dai->name); \ 395 if (ret < 0) { \ 396 dev_err(soc_dai->dev, \ 397 "ASoC: Unable to apply %s constraint: %d\n",\ 398 #name, ret); \ 399 return ret; \ 400 } \ 401 } 402 403 __soc_pcm_apply_symmetry(rate, RATE); 404 __soc_pcm_apply_symmetry(channels, CHANNELS); 405 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 406 407 return 0; 408 } 409 410 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 411 struct snd_pcm_hw_params *params) 412 { 413 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 414 struct snd_soc_dai d; 415 struct snd_soc_dai *dai; 416 struct snd_soc_dai *cpu_dai; 417 unsigned int symmetry, i; 418 419 d.name = __func__; 420 soc_pcm_set_dai_params(&d, params); 421 422 #define __soc_pcm_params_symmetry(xxx) \ 423 symmetry = rtd->dai_link->symmetric_##xxx; \ 424 for_each_rtd_dais(rtd, i, dai) \ 425 symmetry |= dai->driver->symmetric_##xxx; \ 426 \ 427 if (symmetry) \ 428 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 429 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 430 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 431 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 432 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 433 return -EINVAL; \ 434 } 435 436 /* reject unmatched parameters when applying symmetry */ 437 __soc_pcm_params_symmetry(rate); 438 __soc_pcm_params_symmetry(channels); 439 __soc_pcm_params_symmetry(sample_bits); 440 441 return 0; 442 } 443 444 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 445 { 446 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 447 struct snd_soc_dai_link *link = rtd->dai_link; 448 struct snd_soc_dai *dai; 449 unsigned int symmetry, i; 450 451 symmetry = link->symmetric_rate || 452 link->symmetric_channels || 453 link->symmetric_sample_bits; 454 455 for_each_rtd_dais(rtd, i, dai) 456 symmetry = symmetry || 457 dai->driver->symmetric_rate || 458 dai->driver->symmetric_channels || 459 dai->driver->symmetric_sample_bits; 460 461 if (symmetry) 462 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 463 } 464 465 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 466 { 467 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 468 int ret; 469 470 if (!bits) 471 return; 472 473 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 474 if (ret != 0) 475 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 476 bits, ret); 477 } 478 479 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 480 { 481 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 482 struct snd_soc_dai *cpu_dai; 483 struct snd_soc_dai *codec_dai; 484 int stream = substream->stream; 485 int i; 486 unsigned int bits = 0, cpu_bits = 0; 487 488 for_each_rtd_codec_dais(rtd, i, codec_dai) { 489 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 490 491 if (pcm_codec->sig_bits == 0) { 492 bits = 0; 493 break; 494 } 495 bits = max(pcm_codec->sig_bits, bits); 496 } 497 498 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 499 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 500 501 if (pcm_cpu->sig_bits == 0) { 502 cpu_bits = 0; 503 break; 504 } 505 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 506 } 507 508 soc_pcm_set_msb(substream, bits); 509 soc_pcm_set_msb(substream, cpu_bits); 510 } 511 512 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 513 { 514 hw->rates = UINT_MAX; 515 hw->rate_min = 0; 516 hw->rate_max = UINT_MAX; 517 hw->channels_min = 0; 518 hw->channels_max = UINT_MAX; 519 hw->formats = ULLONG_MAX; 520 } 521 522 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 523 struct snd_soc_pcm_stream *p) 524 { 525 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 526 527 /* setup hw->rate_min/max via hw->rates first */ 528 snd_pcm_hw_limit_rates(hw); 529 530 /* update hw->rate_min/max by snd_soc_pcm_stream */ 531 hw->rate_min = max(hw->rate_min, p->rate_min); 532 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 533 } 534 535 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 536 struct snd_soc_pcm_stream *p) 537 { 538 hw->channels_min = max(hw->channels_min, p->channels_min); 539 hw->channels_max = min(hw->channels_max, p->channels_max); 540 } 541 542 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 543 struct snd_soc_pcm_stream *p) 544 { 545 hw->formats &= p->formats; 546 } 547 548 /** 549 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 550 * @rtd: ASoC PCM runtime 551 * @hw: PCM hardware parameters (output) 552 * @stream: Direction of the PCM stream 553 * 554 * Calculates the subset of stream parameters supported by all DAIs 555 * associated with the PCM stream. 556 */ 557 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 558 struct snd_pcm_hardware *hw, int stream) 559 { 560 struct snd_soc_dai *codec_dai; 561 struct snd_soc_dai *cpu_dai; 562 struct snd_soc_pcm_stream *codec_stream; 563 struct snd_soc_pcm_stream *cpu_stream; 564 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 565 int i; 566 567 soc_pcm_hw_init(hw); 568 569 /* first calculate min/max only for CPUs in the DAI link */ 570 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 571 572 /* 573 * Skip CPUs which don't support the current stream type. 574 * Otherwise, since the rate, channel, and format values will 575 * zero in that case, we would have no usable settings left, 576 * causing the resulting setup to fail. 577 */ 578 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 579 continue; 580 581 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 582 583 soc_pcm_hw_update_chan(hw, cpu_stream); 584 soc_pcm_hw_update_rate(hw, cpu_stream); 585 soc_pcm_hw_update_format(hw, cpu_stream); 586 } 587 cpu_chan_min = hw->channels_min; 588 cpu_chan_max = hw->channels_max; 589 590 /* second calculate min/max only for CODECs in the DAI link */ 591 for_each_rtd_codec_dais(rtd, i, codec_dai) { 592 593 /* 594 * Skip CODECs which don't support the current stream type. 595 * Otherwise, since the rate, channel, and format values will 596 * zero in that case, we would have no usable settings left, 597 * causing the resulting setup to fail. 598 */ 599 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 600 continue; 601 602 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 603 604 soc_pcm_hw_update_chan(hw, codec_stream); 605 soc_pcm_hw_update_rate(hw, codec_stream); 606 soc_pcm_hw_update_format(hw, codec_stream); 607 } 608 609 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 610 if (!hw->channels_min) 611 return -EINVAL; 612 613 /* 614 * chan min/max cannot be enforced if there are multiple CODEC DAIs 615 * connected to CPU DAI(s), use CPU DAI's directly and let 616 * channel allocation be fixed up later 617 */ 618 if (rtd->num_codecs > 1) { 619 hw->channels_min = cpu_chan_min; 620 hw->channels_max = cpu_chan_max; 621 } 622 623 return 0; 624 } 625 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 626 627 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 628 { 629 struct snd_pcm_hardware *hw = &substream->runtime->hw; 630 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 631 u64 formats = hw->formats; 632 633 /* 634 * At least one CPU and one CODEC should match. Otherwise, we should 635 * have bailed out on a higher level, since there would be no CPU or 636 * CODEC to support the transfer direction in that case. 637 */ 638 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 639 640 if (formats) 641 hw->formats &= formats; 642 } 643 644 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 645 { 646 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 647 struct snd_soc_component *component; 648 int i, ret = 0; 649 650 for_each_rtd_components(rtd, i, component) { 651 ret = snd_soc_component_module_get_when_open(component, substream); 652 if (ret < 0) 653 break; 654 655 ret = snd_soc_component_open(component, substream); 656 if (ret < 0) 657 break; 658 } 659 660 return ret; 661 } 662 663 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 664 int rollback) 665 { 666 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 667 struct snd_soc_component *component; 668 int i, ret = 0; 669 670 for_each_rtd_components(rtd, i, component) { 671 int r = snd_soc_component_close(component, substream, rollback); 672 if (r < 0) 673 ret = r; /* use last ret */ 674 675 snd_soc_component_module_put_when_close(component, substream, rollback); 676 } 677 678 return ret; 679 } 680 681 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 682 struct snd_pcm_substream *substream, int rollback) 683 { 684 struct snd_soc_component *component; 685 struct snd_soc_dai *dai; 686 int i; 687 688 snd_soc_dpcm_mutex_assert_held(rtd); 689 690 if (!rollback) 691 snd_soc_runtime_deactivate(rtd, substream->stream); 692 693 for_each_rtd_dais(rtd, i, dai) 694 snd_soc_dai_shutdown(dai, substream, rollback); 695 696 snd_soc_link_shutdown(substream, rollback); 697 698 soc_pcm_components_close(substream, rollback); 699 700 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 701 702 for_each_rtd_components(rtd, i, component) 703 if (!snd_soc_component_active(component)) 704 pinctrl_pm_select_sleep_state(component->dev); 705 706 return 0; 707 } 708 709 /* 710 * Called by ALSA when a PCM substream is closed. Private data can be 711 * freed here. The cpu DAI, codec DAI, machine and components are also 712 * shutdown. 713 */ 714 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 715 struct snd_pcm_substream *substream) 716 { 717 return soc_pcm_clean(rtd, substream, 0); 718 } 719 720 /* PCM close ops for non-DPCM streams */ 721 static int soc_pcm_close(struct snd_pcm_substream *substream) 722 { 723 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 724 725 snd_soc_dpcm_mutex_lock(rtd); 726 soc_pcm_clean(rtd, substream, 0); 727 snd_soc_dpcm_mutex_unlock(rtd); 728 return 0; 729 } 730 731 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 732 { 733 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 734 struct snd_pcm_hardware *hw = &substream->runtime->hw; 735 const char *name_cpu = soc_cpu_dai_name(rtd); 736 const char *name_codec = soc_codec_dai_name(rtd); 737 const char *err_msg; 738 struct device *dev = rtd->dev; 739 740 err_msg = "rates"; 741 if (!hw->rates) 742 goto config_err; 743 744 err_msg = "formats"; 745 if (!hw->formats) 746 goto config_err; 747 748 err_msg = "channels"; 749 if (!hw->channels_min || !hw->channels_max || 750 hw->channels_min > hw->channels_max) 751 goto config_err; 752 753 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 754 name_cpu); 755 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 756 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 757 hw->channels_max); 758 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 759 hw->rate_max); 760 761 return 0; 762 763 config_err: 764 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 765 name_codec, name_cpu, err_msg); 766 return -EINVAL; 767 } 768 769 /* 770 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 771 * then initialized and any private data can be allocated. This also calls 772 * startup for the cpu DAI, component, machine and codec DAI. 773 */ 774 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 775 struct snd_pcm_substream *substream) 776 { 777 struct snd_soc_component *component; 778 struct snd_soc_dai *dai; 779 int i, ret = 0; 780 781 snd_soc_dpcm_mutex_assert_held(rtd); 782 783 for_each_rtd_components(rtd, i, component) 784 pinctrl_pm_select_default_state(component->dev); 785 786 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 787 if (ret < 0) 788 goto err; 789 790 ret = soc_pcm_components_open(substream); 791 if (ret < 0) 792 goto err; 793 794 ret = snd_soc_link_startup(substream); 795 if (ret < 0) 796 goto err; 797 798 /* startup the audio subsystem */ 799 for_each_rtd_dais(rtd, i, dai) { 800 ret = snd_soc_dai_startup(dai, substream); 801 if (ret < 0) 802 goto err; 803 804 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 805 dai->tx_mask = 0; 806 else 807 dai->rx_mask = 0; 808 } 809 810 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 811 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 812 goto dynamic; 813 814 /* Check that the codec and cpu DAIs are compatible */ 815 soc_pcm_init_runtime_hw(substream); 816 817 soc_pcm_update_symmetry(substream); 818 819 ret = soc_hw_sanity_check(substream); 820 if (ret < 0) 821 goto err; 822 823 soc_pcm_apply_msb(substream); 824 825 /* Symmetry only applies if we've already got an active stream. */ 826 for_each_rtd_dais(rtd, i, dai) { 827 ret = soc_pcm_apply_symmetry(substream, dai); 828 if (ret != 0) 829 goto err; 830 } 831 dynamic: 832 snd_soc_runtime_activate(rtd, substream->stream); 833 ret = 0; 834 err: 835 if (ret < 0) { 836 soc_pcm_clean(rtd, substream, 1); 837 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret); 838 } 839 840 return ret; 841 } 842 843 /* PCM open ops for non-DPCM streams */ 844 static int soc_pcm_open(struct snd_pcm_substream *substream) 845 { 846 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 847 int ret; 848 849 snd_soc_dpcm_mutex_lock(rtd); 850 ret = __soc_pcm_open(rtd, substream); 851 snd_soc_dpcm_mutex_unlock(rtd); 852 return ret; 853 } 854 855 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 856 { 857 /* 858 * Currently nothing to do for c2c links 859 * Since c2c links are internal nodes in the DAPM graph and 860 * don't interface with the outside world or application layer 861 * we don't have to do any special handling on close. 862 */ 863 } 864 865 /* 866 * Called by ALSA when the PCM substream is prepared, can set format, sample 867 * rate, etc. This function is non atomic and can be called multiple times, 868 * it can refer to the runtime info. 869 */ 870 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 871 struct snd_pcm_substream *substream) 872 { 873 struct snd_soc_dai *dai; 874 int i, ret = 0; 875 876 snd_soc_dpcm_mutex_assert_held(rtd); 877 878 ret = snd_soc_link_prepare(substream); 879 if (ret < 0) 880 goto out; 881 882 ret = snd_soc_pcm_component_prepare(substream); 883 if (ret < 0) 884 goto out; 885 886 ret = snd_soc_pcm_dai_prepare(substream); 887 if (ret < 0) 888 goto out; 889 890 /* cancel any delayed stream shutdown that is pending */ 891 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 892 rtd->pop_wait) { 893 rtd->pop_wait = 0; 894 cancel_delayed_work(&rtd->delayed_work); 895 } 896 897 snd_soc_dapm_stream_event(rtd, substream->stream, 898 SND_SOC_DAPM_STREAM_START); 899 900 for_each_rtd_dais(rtd, i, dai) 901 snd_soc_dai_digital_mute(dai, 0, substream->stream); 902 903 out: 904 if (ret < 0) 905 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 906 907 return ret; 908 } 909 910 /* PCM prepare ops for non-DPCM streams */ 911 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 912 { 913 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 914 int ret; 915 916 snd_soc_dpcm_mutex_lock(rtd); 917 ret = __soc_pcm_prepare(rtd, substream); 918 snd_soc_dpcm_mutex_unlock(rtd); 919 return ret; 920 } 921 922 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 923 unsigned int mask) 924 { 925 struct snd_interval *interval; 926 int channels = hweight_long(mask); 927 928 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 929 interval->min = channels; 930 interval->max = channels; 931 } 932 933 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 934 struct snd_pcm_substream *substream, int rollback) 935 { 936 struct snd_soc_dai *dai; 937 int i; 938 939 snd_soc_dpcm_mutex_assert_held(rtd); 940 941 /* clear the corresponding DAIs parameters when going to be inactive */ 942 for_each_rtd_dais(rtd, i, dai) { 943 if (snd_soc_dai_active(dai) == 1) 944 soc_pcm_set_dai_params(dai, NULL); 945 946 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) 947 snd_soc_dai_digital_mute(dai, 1, substream->stream); 948 } 949 950 /* run the stream event */ 951 snd_soc_dapm_stream_stop(rtd, substream->stream); 952 953 /* free any machine hw params */ 954 snd_soc_link_hw_free(substream, rollback); 955 956 /* free any component resources */ 957 snd_soc_pcm_component_hw_free(substream, rollback); 958 959 /* now free hw params for the DAIs */ 960 for_each_rtd_dais(rtd, i, dai) 961 if (snd_soc_dai_stream_valid(dai, substream->stream)) 962 snd_soc_dai_hw_free(dai, substream, rollback); 963 964 return 0; 965 } 966 967 /* 968 * Frees resources allocated by hw_params, can be called multiple times 969 */ 970 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 971 struct snd_pcm_substream *substream) 972 { 973 return soc_pcm_hw_clean(rtd, substream, 0); 974 } 975 976 /* hw_free PCM ops for non-DPCM streams */ 977 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 978 { 979 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 980 int ret; 981 982 snd_soc_dpcm_mutex_lock(rtd); 983 ret = __soc_pcm_hw_free(rtd, substream); 984 snd_soc_dpcm_mutex_unlock(rtd); 985 return ret; 986 } 987 988 /* 989 * Called by ALSA when the hardware params are set by application. This 990 * function can also be called multiple times and can allocate buffers 991 * (using snd_pcm_lib_* ). It's non-atomic. 992 */ 993 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 994 struct snd_pcm_substream *substream, 995 struct snd_pcm_hw_params *params) 996 { 997 struct snd_soc_dai *cpu_dai; 998 struct snd_soc_dai *codec_dai; 999 int i, ret = 0; 1000 1001 snd_soc_dpcm_mutex_assert_held(rtd); 1002 1003 ret = soc_pcm_params_symmetry(substream, params); 1004 if (ret) 1005 goto out; 1006 1007 ret = snd_soc_link_hw_params(substream, params); 1008 if (ret < 0) 1009 goto out; 1010 1011 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1012 struct snd_pcm_hw_params codec_params; 1013 1014 /* 1015 * Skip CODECs which don't support the current stream type, 1016 * the idea being that if a CODEC is not used for the currently 1017 * set up transfer direction, it should not need to be 1018 * configured, especially since the configuration used might 1019 * not even be supported by that CODEC. There may be cases 1020 * however where a CODEC needs to be set up although it is 1021 * actually not being used for the transfer, e.g. if a 1022 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1023 * for the DAI link including a playback-only CODEC. 1024 * If this becomes necessary, we will have to augment the 1025 * machine driver setup with information on how to act, so 1026 * we can do the right thing here. 1027 */ 1028 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1029 continue; 1030 1031 /* copy params for each codec */ 1032 codec_params = *params; 1033 1034 /* fixup params based on TDM slot masks */ 1035 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1036 codec_dai->tx_mask) 1037 soc_pcm_codec_params_fixup(&codec_params, 1038 codec_dai->tx_mask); 1039 1040 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 1041 codec_dai->rx_mask) 1042 soc_pcm_codec_params_fixup(&codec_params, 1043 codec_dai->rx_mask); 1044 1045 ret = snd_soc_dai_hw_params(codec_dai, substream, 1046 &codec_params); 1047 if(ret < 0) 1048 goto out; 1049 1050 soc_pcm_set_dai_params(codec_dai, &codec_params); 1051 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1052 } 1053 1054 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1055 /* 1056 * Skip CPUs which don't support the current stream 1057 * type. See soc_pcm_init_runtime_hw() for more details 1058 */ 1059 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1060 continue; 1061 1062 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1063 if (ret < 0) 1064 goto out; 1065 1066 /* store the parameters for each DAI */ 1067 soc_pcm_set_dai_params(cpu_dai, params); 1068 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1069 } 1070 1071 ret = snd_soc_pcm_component_hw_params(substream, params); 1072 out: 1073 if (ret < 0) { 1074 soc_pcm_hw_clean(rtd, substream, 1); 1075 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 1076 } 1077 1078 return ret; 1079 } 1080 1081 /* hw_params PCM ops for non-DPCM streams */ 1082 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1083 struct snd_pcm_hw_params *params) 1084 { 1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1086 int ret; 1087 1088 snd_soc_dpcm_mutex_lock(rtd); 1089 ret = __soc_pcm_hw_params(rtd, substream, params); 1090 snd_soc_dpcm_mutex_unlock(rtd); 1091 return ret; 1092 } 1093 1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1095 { 1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1097 int ret = -EINVAL, _ret = 0; 1098 int rollback = 0; 1099 1100 switch (cmd) { 1101 case SNDRV_PCM_TRIGGER_START: 1102 case SNDRV_PCM_TRIGGER_RESUME: 1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1104 ret = snd_soc_link_trigger(substream, cmd, 0); 1105 if (ret < 0) 1106 goto start_err; 1107 1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1109 if (ret < 0) 1110 goto start_err; 1111 1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1113 start_err: 1114 if (ret < 0) 1115 rollback = 1; 1116 } 1117 1118 if (rollback) { 1119 _ret = ret; 1120 switch (cmd) { 1121 case SNDRV_PCM_TRIGGER_START: 1122 cmd = SNDRV_PCM_TRIGGER_STOP; 1123 break; 1124 case SNDRV_PCM_TRIGGER_RESUME: 1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1126 break; 1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1129 break; 1130 } 1131 } 1132 1133 switch (cmd) { 1134 case SNDRV_PCM_TRIGGER_STOP: 1135 case SNDRV_PCM_TRIGGER_SUSPEND: 1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1137 if (rtd->dai_link->stop_dma_first) { 1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1139 if (ret < 0) 1140 break; 1141 1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1143 if (ret < 0) 1144 break; 1145 } else { 1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1147 if (ret < 0) 1148 break; 1149 1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1151 if (ret < 0) 1152 break; 1153 } 1154 ret = snd_soc_link_trigger(substream, cmd, rollback); 1155 break; 1156 } 1157 1158 if (_ret) 1159 ret = _ret; 1160 1161 return ret; 1162 } 1163 1164 /* 1165 * soc level wrapper for pointer callback 1166 * If cpu_dai, codec_dai, component driver has the delay callback, then 1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1168 */ 1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_uframes_t offset = 0; 1173 snd_pcm_sframes_t codec_delay = 0; 1174 snd_pcm_sframes_t cpu_delay = 0; 1175 1176 offset = snd_soc_pcm_component_pointer(substream); 1177 1178 /* should be called *after* snd_soc_pcm_component_pointer() */ 1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1181 1182 runtime->delay = cpu_delay + codec_delay; 1183 1184 return offset; 1185 } 1186 1187 /* connect a FE and BE */ 1188 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1189 struct snd_soc_pcm_runtime *be, int stream) 1190 { 1191 struct snd_pcm_substream *fe_substream; 1192 struct snd_pcm_substream *be_substream; 1193 struct snd_soc_dpcm *dpcm; 1194 1195 snd_soc_dpcm_mutex_assert_held(fe); 1196 1197 /* only add new dpcms */ 1198 for_each_dpcm_be(fe, stream, dpcm) { 1199 if (dpcm->be == be && dpcm->fe == fe) 1200 return 0; 1201 } 1202 1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1204 be_substream = snd_soc_dpcm_get_substream(be, stream); 1205 1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1208 __func__); 1209 return -EINVAL; 1210 } 1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1212 dev_warn(be->dev, "%s: FE is nonatomic but BE is not, forcing BE as nonatomic\n", 1213 __func__); 1214 be_substream->pcm->nonatomic = 1; 1215 } 1216 1217 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_ATOMIC); 1218 if (!dpcm) 1219 return -ENOMEM; 1220 1221 dpcm->be = be; 1222 dpcm->fe = fe; 1223 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1224 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1225 snd_soc_dpcm_stream_lock_irq(fe, stream); 1226 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1227 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1228 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1229 1230 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1231 stream ? "capture" : "playback", fe->dai_link->name, 1232 stream ? "<-" : "->", be->dai_link->name); 1233 1234 dpcm_create_debugfs_state(dpcm, stream); 1235 1236 return 1; 1237 } 1238 1239 /* reparent a BE onto another FE */ 1240 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1241 struct snd_soc_pcm_runtime *be, int stream) 1242 { 1243 struct snd_soc_dpcm *dpcm; 1244 struct snd_pcm_substream *fe_substream, *be_substream; 1245 1246 /* reparent if BE is connected to other FEs */ 1247 if (!be->dpcm[stream].users) 1248 return; 1249 1250 be_substream = snd_soc_dpcm_get_substream(be, stream); 1251 1252 for_each_dpcm_fe(be, stream, dpcm) { 1253 if (dpcm->fe == fe) 1254 continue; 1255 1256 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1257 stream ? "capture" : "playback", 1258 dpcm->fe->dai_link->name, 1259 stream ? "<-" : "->", dpcm->be->dai_link->name); 1260 1261 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1262 be_substream->runtime = fe_substream->runtime; 1263 break; 1264 } 1265 } 1266 1267 /* disconnect a BE and FE */ 1268 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1269 { 1270 struct snd_soc_dpcm *dpcm, *d; 1271 1272 snd_soc_dpcm_mutex_assert_held(fe); 1273 1274 snd_soc_dpcm_stream_lock_irq(fe, stream); 1275 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1276 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1277 stream ? "capture" : "playback", 1278 dpcm->be->dai_link->name); 1279 1280 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1281 continue; 1282 1283 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1284 stream ? "capture" : "playback", fe->dai_link->name, 1285 stream ? "<-" : "->", dpcm->be->dai_link->name); 1286 1287 /* BEs still alive need new FE */ 1288 dpcm_be_reparent(fe, dpcm->be, stream); 1289 1290 dpcm_remove_debugfs_state(dpcm); 1291 1292 list_del(&dpcm->list_be); 1293 list_del(&dpcm->list_fe); 1294 kfree(dpcm); 1295 } 1296 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1297 } 1298 1299 /* get BE for DAI widget and stream */ 1300 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1301 struct snd_soc_dapm_widget *widget, int stream) 1302 { 1303 struct snd_soc_pcm_runtime *be; 1304 struct snd_soc_dapm_widget *w; 1305 struct snd_soc_dai *dai; 1306 int i; 1307 1308 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1309 1310 for_each_card_rtds(card, be) { 1311 1312 if (!be->dai_link->no_pcm) 1313 continue; 1314 1315 for_each_rtd_dais(be, i, dai) { 1316 w = snd_soc_dai_get_widget(dai, stream); 1317 1318 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1319 w ? w->name : "(not set)"); 1320 1321 if (w == widget) 1322 return be; 1323 } 1324 } 1325 1326 /* Widget provided is not a BE */ 1327 return NULL; 1328 } 1329 1330 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1331 struct snd_soc_dapm_widget *widget) 1332 { 1333 struct snd_soc_dapm_widget *w; 1334 int i; 1335 1336 for_each_dapm_widgets(list, i, w) 1337 if (widget == w) 1338 return 1; 1339 1340 return 0; 1341 } 1342 1343 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1344 { 1345 struct snd_soc_card *card = widget->dapm->card; 1346 struct snd_soc_pcm_runtime *rtd; 1347 int stream; 1348 1349 /* adjust dir to stream */ 1350 if (dir == SND_SOC_DAPM_DIR_OUT) 1351 stream = SNDRV_PCM_STREAM_PLAYBACK; 1352 else 1353 stream = SNDRV_PCM_STREAM_CAPTURE; 1354 1355 rtd = dpcm_get_be(card, widget, stream); 1356 if (rtd) 1357 return true; 1358 1359 return false; 1360 } 1361 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1362 1363 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1364 int stream, struct snd_soc_dapm_widget_list **list) 1365 { 1366 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1367 int paths; 1368 1369 if (fe->num_cpus > 1) { 1370 dev_err(fe->dev, 1371 "%s doesn't support Multi CPU yet\n", __func__); 1372 return -EINVAL; 1373 } 1374 1375 /* get number of valid DAI paths and their widgets */ 1376 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1377 fe->card->component_chaining ? 1378 NULL : dpcm_end_walk_at_be); 1379 1380 if (paths > 0) 1381 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1382 stream ? "capture" : "playback"); 1383 else if (paths == 0) 1384 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1385 stream ? "capture" : "playback"); 1386 1387 return paths; 1388 } 1389 1390 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1391 { 1392 snd_soc_dapm_dai_free_widgets(list); 1393 } 1394 1395 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1396 struct snd_soc_dapm_widget_list *list) 1397 { 1398 struct snd_soc_dai *dai; 1399 unsigned int i; 1400 1401 /* is there a valid DAI widget for this BE */ 1402 for_each_rtd_dais(dpcm->be, i, dai) { 1403 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1404 1405 /* 1406 * The BE is pruned only if none of the dai 1407 * widgets are in the active list. 1408 */ 1409 if (widget && widget_in_list(list, widget)) 1410 return true; 1411 } 1412 1413 return false; 1414 } 1415 1416 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1417 struct snd_soc_dapm_widget_list **list_) 1418 { 1419 struct snd_soc_dpcm *dpcm; 1420 int prune = 0; 1421 1422 /* Destroy any old FE <--> BE connections */ 1423 for_each_dpcm_be(fe, stream, dpcm) { 1424 if (dpcm_be_is_active(dpcm, stream, *list_)) 1425 continue; 1426 1427 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1428 stream ? "capture" : "playback", 1429 dpcm->be->dai_link->name, fe->dai_link->name); 1430 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1431 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1432 prune++; 1433 } 1434 1435 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1436 return prune; 1437 } 1438 1439 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1440 struct snd_soc_dapm_widget_list **list_) 1441 { 1442 struct snd_soc_card *card = fe->card; 1443 struct snd_soc_dapm_widget_list *list = *list_; 1444 struct snd_soc_pcm_runtime *be; 1445 struct snd_soc_dapm_widget *widget; 1446 int i, new = 0, err; 1447 1448 /* Create any new FE <--> BE connections */ 1449 for_each_dapm_widgets(list, i, widget) { 1450 1451 switch (widget->id) { 1452 case snd_soc_dapm_dai_in: 1453 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1454 continue; 1455 break; 1456 case snd_soc_dapm_dai_out: 1457 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1458 continue; 1459 break; 1460 default: 1461 continue; 1462 } 1463 1464 /* is there a valid BE rtd for this widget */ 1465 be = dpcm_get_be(card, widget, stream); 1466 if (!be) { 1467 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1468 widget->name); 1469 continue; 1470 } 1471 1472 /* don't connect if FE is not running */ 1473 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1474 continue; 1475 1476 /* 1477 * Filter for systems with 'component_chaining' enabled. 1478 * This helps to avoid unnecessary re-configuration of an 1479 * already active BE on such systems. 1480 */ 1481 if (fe->card->component_chaining && 1482 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1483 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1484 continue; 1485 1486 /* newly connected FE and BE */ 1487 err = dpcm_be_connect(fe, be, stream); 1488 if (err < 0) { 1489 dev_err(fe->dev, "ASoC: can't connect %s\n", 1490 widget->name); 1491 break; 1492 } else if (err == 0) /* already connected */ 1493 continue; 1494 1495 /* new */ 1496 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1497 new++; 1498 } 1499 1500 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1501 return new; 1502 } 1503 1504 /* 1505 * Find the corresponding BE DAIs that source or sink audio to this 1506 * FE substream. 1507 */ 1508 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1509 int stream, struct snd_soc_dapm_widget_list **list, int new) 1510 { 1511 if (new) 1512 return dpcm_add_paths(fe, stream, list); 1513 else 1514 return dpcm_prune_paths(fe, stream, list); 1515 } 1516 1517 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1518 { 1519 struct snd_soc_dpcm *dpcm; 1520 1521 for_each_dpcm_be(fe, stream, dpcm) 1522 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1523 } 1524 1525 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1526 int do_hw_free, struct snd_soc_dpcm *last) 1527 { 1528 struct snd_soc_dpcm *dpcm; 1529 1530 /* disable any enabled and non active backends */ 1531 for_each_dpcm_be(fe, stream, dpcm) { 1532 struct snd_soc_pcm_runtime *be = dpcm->be; 1533 struct snd_pcm_substream *be_substream = 1534 snd_soc_dpcm_get_substream(be, stream); 1535 1536 if (dpcm == last) 1537 return; 1538 1539 /* is this op for this BE ? */ 1540 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1541 continue; 1542 1543 if (be->dpcm[stream].users == 0) { 1544 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1545 stream ? "capture" : "playback", 1546 be->dpcm[stream].state); 1547 continue; 1548 } 1549 1550 if (--be->dpcm[stream].users != 0) 1551 continue; 1552 1553 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1554 if (!do_hw_free) 1555 continue; 1556 1557 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1558 __soc_pcm_hw_free(be, be_substream); 1559 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1560 } 1561 } 1562 1563 __soc_pcm_close(be, be_substream); 1564 be_substream->runtime = NULL; 1565 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1566 } 1567 } 1568 1569 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1570 { 1571 struct snd_soc_pcm_runtime *be; 1572 struct snd_soc_dpcm *dpcm; 1573 int err, count = 0; 1574 1575 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1576 for_each_dpcm_be(fe, stream, dpcm) { 1577 struct snd_pcm_substream *be_substream; 1578 1579 be = dpcm->be; 1580 be_substream = snd_soc_dpcm_get_substream(be, stream); 1581 1582 if (!be_substream) { 1583 dev_err(be->dev, "ASoC: no backend %s stream\n", 1584 stream ? "capture" : "playback"); 1585 continue; 1586 } 1587 1588 /* is this op for this BE ? */ 1589 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1590 continue; 1591 1592 /* first time the dpcm is open ? */ 1593 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1594 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1595 stream ? "capture" : "playback", 1596 be->dpcm[stream].state); 1597 continue; 1598 } 1599 1600 if (be->dpcm[stream].users++ != 0) 1601 continue; 1602 1603 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1604 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1605 continue; 1606 1607 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1608 stream ? "capture" : "playback", be->dai_link->name); 1609 1610 be_substream->runtime = be->dpcm[stream].runtime; 1611 err = __soc_pcm_open(be, be_substream); 1612 if (err < 0) { 1613 be->dpcm[stream].users--; 1614 if (be->dpcm[stream].users < 0) 1615 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1616 stream ? "capture" : "playback", 1617 be->dpcm[stream].state); 1618 1619 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1620 goto unwind; 1621 } 1622 be->dpcm[stream].be_start = 0; 1623 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1624 count++; 1625 } 1626 1627 return count; 1628 1629 unwind: 1630 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1631 1632 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1633 __func__, be->dai_link->name, err); 1634 1635 return err; 1636 } 1637 1638 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1639 { 1640 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1641 struct snd_pcm_runtime *runtime = substream->runtime; 1642 struct snd_pcm_hardware *hw = &runtime->hw; 1643 struct snd_soc_dai *dai; 1644 int stream = substream->stream; 1645 int i; 1646 1647 soc_pcm_hw_init(hw); 1648 1649 for_each_rtd_cpu_dais(fe, i, dai) { 1650 struct snd_soc_pcm_stream *cpu_stream; 1651 1652 /* 1653 * Skip CPUs which don't support the current stream 1654 * type. See soc_pcm_init_runtime_hw() for more details 1655 */ 1656 if (!snd_soc_dai_stream_valid(dai, stream)) 1657 continue; 1658 1659 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1660 1661 soc_pcm_hw_update_rate(hw, cpu_stream); 1662 soc_pcm_hw_update_chan(hw, cpu_stream); 1663 soc_pcm_hw_update_format(hw, cpu_stream); 1664 } 1665 1666 } 1667 1668 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1669 { 1670 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1671 struct snd_pcm_runtime *runtime = substream->runtime; 1672 struct snd_pcm_hardware *hw = &runtime->hw; 1673 struct snd_soc_dpcm *dpcm; 1674 struct snd_soc_dai *dai; 1675 int stream = substream->stream; 1676 1677 if (!fe->dai_link->dpcm_merged_format) 1678 return; 1679 1680 /* 1681 * It returns merged BE codec format 1682 * if FE want to use it (= dpcm_merged_format) 1683 */ 1684 1685 for_each_dpcm_be(fe, stream, dpcm) { 1686 struct snd_soc_pcm_runtime *be = dpcm->be; 1687 struct snd_soc_pcm_stream *codec_stream; 1688 int i; 1689 1690 for_each_rtd_codec_dais(be, i, dai) { 1691 /* 1692 * Skip CODECs which don't support the current stream 1693 * type. See soc_pcm_init_runtime_hw() for more details 1694 */ 1695 if (!snd_soc_dai_stream_valid(dai, stream)) 1696 continue; 1697 1698 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1699 1700 soc_pcm_hw_update_format(hw, codec_stream); 1701 } 1702 } 1703 } 1704 1705 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1706 { 1707 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1708 struct snd_pcm_runtime *runtime = substream->runtime; 1709 struct snd_pcm_hardware *hw = &runtime->hw; 1710 struct snd_soc_dpcm *dpcm; 1711 int stream = substream->stream; 1712 1713 if (!fe->dai_link->dpcm_merged_chan) 1714 return; 1715 1716 /* 1717 * It returns merged BE codec channel; 1718 * if FE want to use it (= dpcm_merged_chan) 1719 */ 1720 1721 for_each_dpcm_be(fe, stream, dpcm) { 1722 struct snd_soc_pcm_runtime *be = dpcm->be; 1723 struct snd_soc_pcm_stream *cpu_stream; 1724 struct snd_soc_dai *dai; 1725 int i; 1726 1727 for_each_rtd_cpu_dais(be, i, dai) { 1728 /* 1729 * Skip CPUs which don't support the current stream 1730 * type. See soc_pcm_init_runtime_hw() for more details 1731 */ 1732 if (!snd_soc_dai_stream_valid(dai, stream)) 1733 continue; 1734 1735 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1736 1737 soc_pcm_hw_update_chan(hw, cpu_stream); 1738 } 1739 1740 /* 1741 * chan min/max cannot be enforced if there are multiple CODEC 1742 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1743 */ 1744 if (be->num_codecs == 1) { 1745 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1746 asoc_rtd_to_codec(be, 0), stream); 1747 1748 soc_pcm_hw_update_chan(hw, codec_stream); 1749 } 1750 } 1751 } 1752 1753 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1754 { 1755 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1756 struct snd_pcm_runtime *runtime = substream->runtime; 1757 struct snd_pcm_hardware *hw = &runtime->hw; 1758 struct snd_soc_dpcm *dpcm; 1759 int stream = substream->stream; 1760 1761 if (!fe->dai_link->dpcm_merged_rate) 1762 return; 1763 1764 /* 1765 * It returns merged BE codec channel; 1766 * if FE want to use it (= dpcm_merged_chan) 1767 */ 1768 1769 for_each_dpcm_be(fe, stream, dpcm) { 1770 struct snd_soc_pcm_runtime *be = dpcm->be; 1771 struct snd_soc_pcm_stream *pcm; 1772 struct snd_soc_dai *dai; 1773 int i; 1774 1775 for_each_rtd_dais(be, i, dai) { 1776 /* 1777 * Skip DAIs which don't support the current stream 1778 * type. See soc_pcm_init_runtime_hw() for more details 1779 */ 1780 if (!snd_soc_dai_stream_valid(dai, stream)) 1781 continue; 1782 1783 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1784 1785 soc_pcm_hw_update_rate(hw, pcm); 1786 } 1787 } 1788 } 1789 1790 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1791 int stream) 1792 { 1793 struct snd_soc_dpcm *dpcm; 1794 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1795 struct snd_soc_dai *fe_cpu_dai; 1796 int err = 0; 1797 int i; 1798 1799 /* apply symmetry for FE */ 1800 soc_pcm_update_symmetry(fe_substream); 1801 1802 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1803 /* Symmetry only applies if we've got an active stream. */ 1804 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1805 if (err < 0) 1806 goto error; 1807 } 1808 1809 /* apply symmetry for BE */ 1810 for_each_dpcm_be(fe, stream, dpcm) { 1811 struct snd_soc_pcm_runtime *be = dpcm->be; 1812 struct snd_pcm_substream *be_substream = 1813 snd_soc_dpcm_get_substream(be, stream); 1814 struct snd_soc_pcm_runtime *rtd; 1815 struct snd_soc_dai *dai; 1816 1817 /* A backend may not have the requested substream */ 1818 if (!be_substream) 1819 continue; 1820 1821 rtd = asoc_substream_to_rtd(be_substream); 1822 if (rtd->dai_link->be_hw_params_fixup) 1823 continue; 1824 1825 soc_pcm_update_symmetry(be_substream); 1826 1827 /* Symmetry only applies if we've got an active stream. */ 1828 for_each_rtd_dais(rtd, i, dai) { 1829 err = soc_pcm_apply_symmetry(fe_substream, dai); 1830 if (err < 0) 1831 goto error; 1832 } 1833 } 1834 error: 1835 if (err < 0) 1836 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err); 1837 1838 return err; 1839 } 1840 1841 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1842 { 1843 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1844 int stream = fe_substream->stream, ret = 0; 1845 1846 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1847 1848 ret = dpcm_be_dai_startup(fe, stream); 1849 if (ret < 0) 1850 goto be_err; 1851 1852 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1853 1854 /* start the DAI frontend */ 1855 ret = __soc_pcm_open(fe, fe_substream); 1856 if (ret < 0) 1857 goto unwind; 1858 1859 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1860 1861 dpcm_runtime_setup_fe(fe_substream); 1862 1863 dpcm_runtime_setup_be_format(fe_substream); 1864 dpcm_runtime_setup_be_chan(fe_substream); 1865 dpcm_runtime_setup_be_rate(fe_substream); 1866 1867 ret = dpcm_apply_symmetry(fe_substream, stream); 1868 1869 unwind: 1870 if (ret < 0) 1871 dpcm_be_dai_startup_unwind(fe, stream); 1872 be_err: 1873 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1874 1875 if (ret < 0) 1876 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret); 1877 1878 return ret; 1879 } 1880 1881 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1882 { 1883 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1884 int stream = substream->stream; 1885 1886 snd_soc_dpcm_mutex_assert_held(fe); 1887 1888 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1889 1890 /* shutdown the BEs */ 1891 dpcm_be_dai_shutdown(fe, stream); 1892 1893 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1894 1895 /* now shutdown the frontend */ 1896 __soc_pcm_close(fe, substream); 1897 1898 /* run the stream stop event */ 1899 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1900 1901 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1902 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1903 return 0; 1904 } 1905 1906 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1907 { 1908 struct snd_soc_dpcm *dpcm; 1909 1910 /* only hw_params backends that are either sinks or sources 1911 * to this frontend DAI */ 1912 for_each_dpcm_be(fe, stream, dpcm) { 1913 1914 struct snd_soc_pcm_runtime *be = dpcm->be; 1915 struct snd_pcm_substream *be_substream = 1916 snd_soc_dpcm_get_substream(be, stream); 1917 1918 /* is this op for this BE ? */ 1919 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1920 continue; 1921 1922 /* only free hw when no longer used - check all FEs */ 1923 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1924 continue; 1925 1926 /* do not free hw if this BE is used by other FE */ 1927 if (be->dpcm[stream].users > 1) 1928 continue; 1929 1930 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1931 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1932 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1933 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1936 continue; 1937 1938 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1939 be->dai_link->name); 1940 1941 __soc_pcm_hw_free(be, be_substream); 1942 1943 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1944 } 1945 } 1946 1947 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1948 { 1949 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1950 int stream = substream->stream; 1951 1952 snd_soc_dpcm_mutex_lock(fe); 1953 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1954 1955 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1956 1957 /* call hw_free on the frontend */ 1958 soc_pcm_hw_clean(fe, substream, 0); 1959 1960 /* only hw_params backends that are either sinks or sources 1961 * to this frontend DAI */ 1962 dpcm_be_dai_hw_free(fe, stream); 1963 1964 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1965 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1966 1967 snd_soc_dpcm_mutex_unlock(fe); 1968 return 0; 1969 } 1970 1971 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1972 { 1973 struct snd_soc_pcm_runtime *be; 1974 struct snd_pcm_substream *be_substream; 1975 struct snd_soc_dpcm *dpcm; 1976 int ret; 1977 1978 for_each_dpcm_be(fe, stream, dpcm) { 1979 be = dpcm->be; 1980 be_substream = snd_soc_dpcm_get_substream(be, stream); 1981 1982 /* is this op for this BE ? */ 1983 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1984 continue; 1985 1986 /* copy params for each dpcm */ 1987 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1988 sizeof(struct snd_pcm_hw_params)); 1989 1990 /* perform any hw_params fixups */ 1991 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params); 1992 if (ret < 0) 1993 goto unwind; 1994 1995 /* copy the fixed-up hw params for BE dai */ 1996 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 1997 sizeof(struct snd_pcm_hw_params)); 1998 1999 /* only allow hw_params() if no connected FEs are running */ 2000 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2001 continue; 2002 2003 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2004 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2005 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2006 continue; 2007 2008 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2009 be->dai_link->name); 2010 2011 ret = __soc_pcm_hw_params(be, be_substream, &dpcm->hw_params); 2012 if (ret < 0) 2013 goto unwind; 2014 2015 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2016 } 2017 return 0; 2018 2019 unwind: 2020 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2021 __func__, be->dai_link->name, ret); 2022 2023 /* disable any enabled and non active backends */ 2024 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2025 be = dpcm->be; 2026 be_substream = snd_soc_dpcm_get_substream(be, stream); 2027 2028 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2029 continue; 2030 2031 /* only allow hw_free() if no connected FEs are running */ 2032 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2033 continue; 2034 2035 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2036 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2037 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2038 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2039 continue; 2040 2041 __soc_pcm_hw_free(be, be_substream); 2042 } 2043 2044 return ret; 2045 } 2046 2047 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2048 struct snd_pcm_hw_params *params) 2049 { 2050 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2051 int ret, stream = substream->stream; 2052 2053 snd_soc_dpcm_mutex_lock(fe); 2054 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2055 2056 memcpy(&fe->dpcm[stream].hw_params, params, 2057 sizeof(struct snd_pcm_hw_params)); 2058 ret = dpcm_be_dai_hw_params(fe, stream); 2059 if (ret < 0) 2060 goto out; 2061 2062 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2063 fe->dai_link->name, params_rate(params), 2064 params_channels(params), params_format(params)); 2065 2066 /* call hw_params on the frontend */ 2067 ret = __soc_pcm_hw_params(fe, substream, params); 2068 if (ret < 0) 2069 dpcm_be_dai_hw_free(fe, stream); 2070 else 2071 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2072 2073 out: 2074 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2075 snd_soc_dpcm_mutex_unlock(fe); 2076 2077 if (ret < 0) 2078 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret); 2079 2080 return ret; 2081 } 2082 2083 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2084 int cmd) 2085 { 2086 struct snd_soc_pcm_runtime *be; 2087 struct snd_soc_dpcm *dpcm; 2088 unsigned long flags; 2089 int ret = 0; 2090 2091 for_each_dpcm_be(fe, stream, dpcm) { 2092 struct snd_pcm_substream *be_substream; 2093 2094 be = dpcm->be; 2095 be_substream = snd_soc_dpcm_get_substream(be, stream); 2096 2097 snd_soc_dpcm_stream_lock_irqsave(be, stream, flags); 2098 2099 /* is this op for this BE ? */ 2100 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2101 goto next; 2102 2103 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2104 be->dai_link->name, cmd); 2105 2106 switch (cmd) { 2107 case SNDRV_PCM_TRIGGER_START: 2108 if (!be->dpcm[stream].be_start && 2109 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2110 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2111 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2112 goto next; 2113 2114 be->dpcm[stream].be_start++; 2115 if (be->dpcm[stream].be_start != 1) 2116 goto next; 2117 2118 ret = soc_pcm_trigger(be_substream, cmd); 2119 if (ret) { 2120 be->dpcm[stream].be_start--; 2121 goto next; 2122 } 2123 2124 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2125 break; 2126 case SNDRV_PCM_TRIGGER_RESUME: 2127 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2128 goto next; 2129 2130 be->dpcm[stream].be_start++; 2131 if (be->dpcm[stream].be_start != 1) 2132 goto next; 2133 2134 ret = soc_pcm_trigger(be_substream, cmd); 2135 if (ret) { 2136 be->dpcm[stream].be_start--; 2137 goto next; 2138 } 2139 2140 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2141 break; 2142 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2143 if (!be->dpcm[stream].be_start && 2144 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2145 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2147 goto next; 2148 2149 be->dpcm[stream].be_start++; 2150 if (be->dpcm[stream].be_start != 1) 2151 goto next; 2152 2153 ret = soc_pcm_trigger(be_substream, cmd); 2154 if (ret) { 2155 be->dpcm[stream].be_start--; 2156 goto next; 2157 } 2158 2159 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2160 break; 2161 case SNDRV_PCM_TRIGGER_STOP: 2162 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2163 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2164 goto next; 2165 2166 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2167 be->dpcm[stream].be_start--; 2168 2169 if (be->dpcm[stream].be_start != 0) 2170 goto next; 2171 2172 ret = soc_pcm_trigger(be_substream, cmd); 2173 if (ret) { 2174 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2175 be->dpcm[stream].be_start++; 2176 goto next; 2177 } 2178 2179 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2180 break; 2181 case SNDRV_PCM_TRIGGER_SUSPEND: 2182 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2183 goto next; 2184 2185 be->dpcm[stream].be_start--; 2186 if (be->dpcm[stream].be_start != 0) 2187 goto next; 2188 2189 ret = soc_pcm_trigger(be_substream, cmd); 2190 if (ret) { 2191 be->dpcm[stream].be_start++; 2192 goto next; 2193 } 2194 2195 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2196 break; 2197 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2198 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2199 goto next; 2200 2201 be->dpcm[stream].be_start--; 2202 if (be->dpcm[stream].be_start != 0) 2203 goto next; 2204 2205 ret = soc_pcm_trigger(be_substream, cmd); 2206 if (ret) { 2207 be->dpcm[stream].be_start++; 2208 goto next; 2209 } 2210 2211 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2212 break; 2213 } 2214 next: 2215 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2216 if (ret) 2217 break; 2218 } 2219 if (ret < 0) 2220 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2221 __func__, be->dai_link->name, ret); 2222 return ret; 2223 } 2224 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2225 2226 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2227 int cmd, bool fe_first) 2228 { 2229 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2230 int ret; 2231 2232 /* call trigger on the frontend before the backend. */ 2233 if (fe_first) { 2234 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2235 fe->dai_link->name, cmd); 2236 2237 ret = soc_pcm_trigger(substream, cmd); 2238 if (ret < 0) 2239 return ret; 2240 2241 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2242 return ret; 2243 } 2244 2245 /* call trigger on the frontend after the backend. */ 2246 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2247 if (ret < 0) 2248 return ret; 2249 2250 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2251 fe->dai_link->name, cmd); 2252 2253 ret = soc_pcm_trigger(substream, cmd); 2254 2255 return ret; 2256 } 2257 2258 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2259 { 2260 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2261 int stream = substream->stream; 2262 int ret = 0; 2263 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2264 2265 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2266 2267 switch (trigger) { 2268 case SND_SOC_DPCM_TRIGGER_PRE: 2269 switch (cmd) { 2270 case SNDRV_PCM_TRIGGER_START: 2271 case SNDRV_PCM_TRIGGER_RESUME: 2272 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2273 case SNDRV_PCM_TRIGGER_DRAIN: 2274 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2275 break; 2276 case SNDRV_PCM_TRIGGER_STOP: 2277 case SNDRV_PCM_TRIGGER_SUSPEND: 2278 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2279 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2280 break; 2281 default: 2282 ret = -EINVAL; 2283 break; 2284 } 2285 break; 2286 case SND_SOC_DPCM_TRIGGER_POST: 2287 switch (cmd) { 2288 case SNDRV_PCM_TRIGGER_START: 2289 case SNDRV_PCM_TRIGGER_RESUME: 2290 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2291 case SNDRV_PCM_TRIGGER_DRAIN: 2292 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2293 break; 2294 case SNDRV_PCM_TRIGGER_STOP: 2295 case SNDRV_PCM_TRIGGER_SUSPEND: 2296 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2297 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2298 break; 2299 default: 2300 ret = -EINVAL; 2301 break; 2302 } 2303 break; 2304 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2305 /* bespoke trigger() - handles both FE and BEs */ 2306 2307 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2308 fe->dai_link->name, cmd); 2309 2310 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2311 break; 2312 default: 2313 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2314 fe->dai_link->name); 2315 ret = -EINVAL; 2316 goto out; 2317 } 2318 2319 if (ret < 0) { 2320 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2321 cmd, ret); 2322 goto out; 2323 } 2324 2325 switch (cmd) { 2326 case SNDRV_PCM_TRIGGER_START: 2327 case SNDRV_PCM_TRIGGER_RESUME: 2328 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2329 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2330 break; 2331 case SNDRV_PCM_TRIGGER_STOP: 2332 case SNDRV_PCM_TRIGGER_SUSPEND: 2333 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2334 break; 2335 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2336 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2337 break; 2338 } 2339 2340 out: 2341 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2342 return ret; 2343 } 2344 2345 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2346 { 2347 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2348 int stream = substream->stream; 2349 2350 /* if FE's runtime_update is already set, we're in race; 2351 * process this trigger later at exit 2352 */ 2353 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2354 fe->dpcm[stream].trigger_pending = cmd + 1; 2355 return 0; /* delayed, assuming it's successful */ 2356 } 2357 2358 /* we're alone, let's trigger */ 2359 return dpcm_fe_dai_do_trigger(substream, cmd); 2360 } 2361 2362 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2363 { 2364 struct snd_soc_dpcm *dpcm; 2365 int ret = 0; 2366 2367 for_each_dpcm_be(fe, stream, dpcm) { 2368 2369 struct snd_soc_pcm_runtime *be = dpcm->be; 2370 struct snd_pcm_substream *be_substream = 2371 snd_soc_dpcm_get_substream(be, stream); 2372 2373 /* is this op for this BE ? */ 2374 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2375 continue; 2376 2377 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2378 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2379 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2380 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2381 continue; 2382 2383 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2384 be->dai_link->name); 2385 2386 ret = __soc_pcm_prepare(be, be_substream); 2387 if (ret < 0) 2388 break; 2389 2390 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2391 } 2392 2393 if (ret < 0) 2394 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2395 2396 return ret; 2397 } 2398 2399 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2400 { 2401 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2402 int stream = substream->stream, ret = 0; 2403 2404 snd_soc_dpcm_mutex_lock(fe); 2405 2406 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2407 2408 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2409 2410 /* there is no point preparing this FE if there are no BEs */ 2411 if (list_empty(&fe->dpcm[stream].be_clients)) { 2412 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2413 fe->dai_link->name); 2414 ret = -EINVAL; 2415 goto out; 2416 } 2417 2418 ret = dpcm_be_dai_prepare(fe, stream); 2419 if (ret < 0) 2420 goto out; 2421 2422 /* call prepare on the frontend */ 2423 ret = __soc_pcm_prepare(fe, substream); 2424 if (ret < 0) 2425 goto out; 2426 2427 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2428 2429 out: 2430 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2431 snd_soc_dpcm_mutex_unlock(fe); 2432 2433 if (ret < 0) 2434 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2435 2436 return ret; 2437 } 2438 2439 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2440 { 2441 struct snd_pcm_substream *substream = 2442 snd_soc_dpcm_get_substream(fe, stream); 2443 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2444 int err; 2445 2446 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2447 stream ? "capture" : "playback", fe->dai_link->name); 2448 2449 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2450 /* call bespoke trigger - FE takes care of all BE triggers */ 2451 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2452 fe->dai_link->name); 2453 2454 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2455 } else { 2456 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2457 fe->dai_link->name); 2458 2459 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2460 } 2461 2462 dpcm_be_dai_hw_free(fe, stream); 2463 2464 dpcm_be_dai_shutdown(fe, stream); 2465 2466 /* run the stream event for each BE */ 2467 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2468 2469 if (err < 0) 2470 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err); 2471 2472 return err; 2473 } 2474 2475 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2476 { 2477 struct snd_pcm_substream *substream = 2478 snd_soc_dpcm_get_substream(fe, stream); 2479 struct snd_soc_dpcm *dpcm; 2480 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2481 int ret = 0; 2482 2483 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2484 stream ? "capture" : "playback", fe->dai_link->name); 2485 2486 /* Only start the BE if the FE is ready */ 2487 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2488 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2489 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2490 fe->dai_link->name, fe->dpcm[stream].state); 2491 ret = -EINVAL; 2492 goto disconnect; 2493 } 2494 2495 /* startup must always be called for new BEs */ 2496 ret = dpcm_be_dai_startup(fe, stream); 2497 if (ret < 0) 2498 goto disconnect; 2499 2500 /* keep going if FE state is > open */ 2501 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2502 return 0; 2503 2504 ret = dpcm_be_dai_hw_params(fe, stream); 2505 if (ret < 0) 2506 goto close; 2507 2508 /* keep going if FE state is > hw_params */ 2509 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2510 return 0; 2511 2512 ret = dpcm_be_dai_prepare(fe, stream); 2513 if (ret < 0) 2514 goto hw_free; 2515 2516 /* run the stream event for each BE */ 2517 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2518 2519 /* keep going if FE state is > prepare */ 2520 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2521 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2522 return 0; 2523 2524 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2525 /* call trigger on the frontend - FE takes care of all BE triggers */ 2526 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2527 fe->dai_link->name); 2528 2529 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2530 if (ret < 0) 2531 goto hw_free; 2532 } else { 2533 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2534 fe->dai_link->name); 2535 2536 ret = dpcm_be_dai_trigger(fe, stream, 2537 SNDRV_PCM_TRIGGER_START); 2538 if (ret < 0) 2539 goto hw_free; 2540 } 2541 2542 return 0; 2543 2544 hw_free: 2545 dpcm_be_dai_hw_free(fe, stream); 2546 close: 2547 dpcm_be_dai_shutdown(fe, stream); 2548 disconnect: 2549 /* disconnect any pending BEs */ 2550 for_each_dpcm_be(fe, stream, dpcm) { 2551 struct snd_soc_pcm_runtime *be = dpcm->be; 2552 2553 /* is this op for this BE ? */ 2554 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2555 continue; 2556 2557 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2558 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2559 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2560 } 2561 2562 if (ret < 0) 2563 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2564 2565 return ret; 2566 } 2567 2568 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2569 { 2570 struct snd_soc_dapm_widget_list *list; 2571 int stream; 2572 int count, paths; 2573 2574 if (!fe->dai_link->dynamic) 2575 return 0; 2576 2577 if (fe->num_cpus > 1) { 2578 dev_err(fe->dev, 2579 "%s doesn't support Multi CPU yet\n", __func__); 2580 return -EINVAL; 2581 } 2582 2583 /* only check active links */ 2584 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2585 return 0; 2586 2587 /* DAPM sync will call this to update DSP paths */ 2588 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2589 new ? "new" : "old", fe->dai_link->name); 2590 2591 for_each_pcm_streams(stream) { 2592 2593 /* skip if FE doesn't have playback/capture capability */ 2594 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2595 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2596 continue; 2597 2598 /* skip if FE isn't currently playing/capturing */ 2599 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2600 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2601 continue; 2602 2603 paths = dpcm_path_get(fe, stream, &list); 2604 if (paths < 0) 2605 return paths; 2606 2607 /* update any playback/capture paths */ 2608 count = dpcm_process_paths(fe, stream, &list, new); 2609 if (count) { 2610 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2611 if (new) 2612 dpcm_run_update_startup(fe, stream); 2613 else 2614 dpcm_run_update_shutdown(fe, stream); 2615 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2616 2617 dpcm_clear_pending_state(fe, stream); 2618 dpcm_be_disconnect(fe, stream); 2619 } 2620 2621 dpcm_path_put(&list); 2622 } 2623 2624 return 0; 2625 } 2626 2627 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2628 * any DAI links. 2629 */ 2630 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2631 { 2632 struct snd_soc_pcm_runtime *fe; 2633 int ret = 0; 2634 2635 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass); 2636 /* shutdown all old paths first */ 2637 for_each_card_rtds(card, fe) { 2638 ret = soc_dpcm_fe_runtime_update(fe, 0); 2639 if (ret) 2640 goto out; 2641 } 2642 2643 /* bring new paths up */ 2644 for_each_card_rtds(card, fe) { 2645 ret = soc_dpcm_fe_runtime_update(fe, 1); 2646 if (ret) 2647 goto out; 2648 } 2649 2650 out: 2651 mutex_unlock(&card->pcm_mutex); 2652 return ret; 2653 } 2654 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2655 2656 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2657 { 2658 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2659 struct snd_soc_dpcm *dpcm; 2660 int stream = fe_substream->stream; 2661 2662 snd_soc_dpcm_mutex_assert_held(fe); 2663 2664 /* mark FE's links ready to prune */ 2665 for_each_dpcm_be(fe, stream, dpcm) 2666 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2667 2668 dpcm_be_disconnect(fe, stream); 2669 2670 fe->dpcm[stream].runtime = NULL; 2671 } 2672 2673 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2674 { 2675 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2676 int ret; 2677 2678 snd_soc_dpcm_mutex_lock(fe); 2679 ret = dpcm_fe_dai_shutdown(fe_substream); 2680 2681 dpcm_fe_dai_cleanup(fe_substream); 2682 2683 snd_soc_dpcm_mutex_unlock(fe); 2684 return ret; 2685 } 2686 2687 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2688 { 2689 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2690 struct snd_soc_dapm_widget_list *list; 2691 int ret; 2692 int stream = fe_substream->stream; 2693 2694 snd_soc_dpcm_mutex_lock(fe); 2695 fe->dpcm[stream].runtime = fe_substream->runtime; 2696 2697 ret = dpcm_path_get(fe, stream, &list); 2698 if (ret < 0) 2699 goto open_end; 2700 2701 /* calculate valid and active FE <-> BE dpcms */ 2702 dpcm_process_paths(fe, stream, &list, 1); 2703 2704 ret = dpcm_fe_dai_startup(fe_substream); 2705 if (ret < 0) 2706 dpcm_fe_dai_cleanup(fe_substream); 2707 2708 dpcm_clear_pending_state(fe, stream); 2709 dpcm_path_put(&list); 2710 open_end: 2711 snd_soc_dpcm_mutex_unlock(fe); 2712 return ret; 2713 } 2714 2715 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2716 int *playback, int *capture) 2717 { 2718 struct snd_soc_dai *cpu_dai; 2719 int i; 2720 2721 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) { 2722 dev_err(rtd->dev, 2723 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2724 return -EINVAL; 2725 } 2726 2727 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2728 int stream; 2729 2730 if (rtd->dai_link->dpcm_playback) { 2731 stream = SNDRV_PCM_STREAM_PLAYBACK; 2732 2733 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2734 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2735 *playback = 1; 2736 break; 2737 } 2738 } 2739 if (!*playback) { 2740 dev_err(rtd->card->dev, 2741 "No CPU DAIs support playback for stream %s\n", 2742 rtd->dai_link->stream_name); 2743 return -EINVAL; 2744 } 2745 } 2746 if (rtd->dai_link->dpcm_capture) { 2747 stream = SNDRV_PCM_STREAM_CAPTURE; 2748 2749 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2750 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2751 *capture = 1; 2752 break; 2753 } 2754 } 2755 2756 if (!*capture) { 2757 dev_err(rtd->card->dev, 2758 "No CPU DAIs support capture for stream %s\n", 2759 rtd->dai_link->stream_name); 2760 return -EINVAL; 2761 } 2762 } 2763 } else { 2764 struct snd_soc_dai *codec_dai; 2765 2766 /* Adapt stream for codec2codec links */ 2767 int cpu_capture = rtd->dai_link->params ? 2768 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2769 int cpu_playback = rtd->dai_link->params ? 2770 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2771 2772 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2773 if (rtd->num_cpus == 1) { 2774 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2775 } else if (rtd->num_cpus == rtd->num_codecs) { 2776 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2777 } else { 2778 dev_err(rtd->card->dev, 2779 "N cpus to M codecs link is not supported yet\n"); 2780 return -EINVAL; 2781 } 2782 2783 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2784 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2785 *playback = 1; 2786 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2787 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2788 *capture = 1; 2789 } 2790 } 2791 2792 if (rtd->dai_link->playback_only) { 2793 *playback = 1; 2794 *capture = 0; 2795 } 2796 2797 if (rtd->dai_link->capture_only) { 2798 *playback = 0; 2799 *capture = 1; 2800 } 2801 2802 return 0; 2803 } 2804 2805 static int soc_create_pcm(struct snd_pcm **pcm, 2806 struct snd_soc_pcm_runtime *rtd, 2807 int playback, int capture, int num) 2808 { 2809 char new_name[64]; 2810 int ret; 2811 2812 /* create the PCM */ 2813 if (rtd->dai_link->params) { 2814 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2815 rtd->dai_link->stream_name); 2816 2817 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2818 playback, capture, pcm); 2819 } else if (rtd->dai_link->no_pcm) { 2820 snprintf(new_name, sizeof(new_name), "(%s)", 2821 rtd->dai_link->stream_name); 2822 2823 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2824 playback, capture, pcm); 2825 } else { 2826 if (rtd->dai_link->dynamic) 2827 snprintf(new_name, sizeof(new_name), "%s (*)", 2828 rtd->dai_link->stream_name); 2829 else 2830 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2831 rtd->dai_link->stream_name, 2832 soc_codec_dai_name(rtd), num); 2833 2834 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2835 capture, pcm); 2836 } 2837 if (ret < 0) { 2838 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2839 new_name, rtd->dai_link->name, ret); 2840 return ret; 2841 } 2842 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2843 2844 return 0; 2845 } 2846 2847 /* create a new pcm */ 2848 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2849 { 2850 struct snd_soc_component *component; 2851 struct snd_pcm *pcm; 2852 int ret = 0, playback = 0, capture = 0; 2853 int i; 2854 2855 ret = soc_get_playback_capture(rtd, &playback, &capture); 2856 if (ret < 0) 2857 return ret; 2858 2859 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2860 if (ret < 0) 2861 return ret; 2862 2863 /* DAPM dai link stream work */ 2864 if (rtd->dai_link->params) 2865 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2866 else 2867 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2868 2869 rtd->pcm = pcm; 2870 pcm->nonatomic = rtd->dai_link->nonatomic; 2871 pcm->private_data = rtd; 2872 2873 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2874 if (playback) 2875 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2876 if (capture) 2877 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2878 goto out; 2879 } 2880 2881 /* ASoC PCM operations */ 2882 if (rtd->dai_link->dynamic) { 2883 rtd->ops.open = dpcm_fe_dai_open; 2884 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2885 rtd->ops.prepare = dpcm_fe_dai_prepare; 2886 rtd->ops.trigger = dpcm_fe_dai_trigger; 2887 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2888 rtd->ops.close = dpcm_fe_dai_close; 2889 rtd->ops.pointer = soc_pcm_pointer; 2890 } else { 2891 rtd->ops.open = soc_pcm_open; 2892 rtd->ops.hw_params = soc_pcm_hw_params; 2893 rtd->ops.prepare = soc_pcm_prepare; 2894 rtd->ops.trigger = soc_pcm_trigger; 2895 rtd->ops.hw_free = soc_pcm_hw_free; 2896 rtd->ops.close = soc_pcm_close; 2897 rtd->ops.pointer = soc_pcm_pointer; 2898 } 2899 2900 for_each_rtd_components(rtd, i, component) { 2901 const struct snd_soc_component_driver *drv = component->driver; 2902 2903 if (drv->ioctl) 2904 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2905 if (drv->sync_stop) 2906 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2907 if (drv->copy_user) 2908 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2909 if (drv->page) 2910 rtd->ops.page = snd_soc_pcm_component_page; 2911 if (drv->mmap) 2912 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2913 if (drv->ack) 2914 rtd->ops.ack = snd_soc_pcm_component_ack; 2915 } 2916 2917 if (playback) 2918 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2919 2920 if (capture) 2921 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2922 2923 ret = snd_soc_pcm_component_new(rtd); 2924 if (ret < 0) 2925 return ret; 2926 2927 pcm->no_device_suspend = true; 2928 out: 2929 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2930 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2931 return ret; 2932 } 2933 2934 /* is the current PCM operation for this FE ? */ 2935 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2936 { 2937 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2938 return 1; 2939 return 0; 2940 } 2941 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2942 2943 /* is the current PCM operation for this BE ? */ 2944 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2945 struct snd_soc_pcm_runtime *be, int stream) 2946 { 2947 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2948 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2949 be->dpcm[stream].runtime_update)) 2950 return 1; 2951 return 0; 2952 } 2953 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2954 2955 /* get the substream for this BE */ 2956 struct snd_pcm_substream * 2957 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2958 { 2959 return be->pcm->streams[stream].substream; 2960 } 2961 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2962 2963 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2964 struct snd_soc_pcm_runtime *be, 2965 int stream, 2966 const enum snd_soc_dpcm_state *states, 2967 int num_states) 2968 { 2969 struct snd_soc_dpcm *dpcm; 2970 int state; 2971 int ret = 1; 2972 int i; 2973 2974 for_each_dpcm_fe(be, stream, dpcm) { 2975 2976 if (dpcm->fe == fe) 2977 continue; 2978 2979 state = dpcm->fe->dpcm[stream].state; 2980 for (i = 0; i < num_states; i++) { 2981 if (state == states[i]) { 2982 ret = 0; 2983 break; 2984 } 2985 } 2986 } 2987 2988 /* it's safe to do this BE DAI */ 2989 return ret; 2990 } 2991 2992 /* 2993 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2994 * are not running, paused or suspended for the specified stream direction. 2995 */ 2996 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2997 struct snd_soc_pcm_runtime *be, int stream) 2998 { 2999 const enum snd_soc_dpcm_state state[] = { 3000 SND_SOC_DPCM_STATE_START, 3001 SND_SOC_DPCM_STATE_PAUSED, 3002 SND_SOC_DPCM_STATE_SUSPEND, 3003 }; 3004 3005 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3006 } 3007 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3008 3009 /* 3010 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3011 * running, paused or suspended for the specified stream direction. 3012 */ 3013 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3014 struct snd_soc_pcm_runtime *be, int stream) 3015 { 3016 const enum snd_soc_dpcm_state state[] = { 3017 SND_SOC_DPCM_STATE_START, 3018 SND_SOC_DPCM_STATE_PAUSED, 3019 SND_SOC_DPCM_STATE_SUSPEND, 3020 SND_SOC_DPCM_STATE_PREPARE, 3021 }; 3022 3023 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3024 } 3025 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3026