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/clk.h> 16 #include <linux/delay.h> 17 #include <linux/pinctrl/consumer.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 31 DEFINE_GUARD(snd_soc_card_mutex, struct snd_soc_card *, 32 snd_soc_card_mutex_lock(_T), snd_soc_card_mutex_unlock(_T)) 33 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 34 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 35 const char *func, int ret) 36 { 37 return snd_soc_ret(rtd->dev, ret, 38 "at %s() on %s\n", func, rtd->dai_link->name); 39 } 40 41 /* is the current PCM operation for this FE ? */ 42 #if 0 43 static int snd_soc_dpcm_can_fe_update(struct snd_soc_pcm_runtime *fe, int stream) 44 { 45 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 46 return 1; 47 return 0; 48 } 49 #endif 50 51 /* is the current PCM operation for this BE ? */ 52 static int snd_soc_dpcm_can_be_update(struct snd_soc_pcm_runtime *fe, 53 struct snd_soc_pcm_runtime *be, int stream) 54 { 55 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 56 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 57 be->dpcm[stream].runtime_update)) 58 return 1; 59 return 0; 60 } 61 62 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 63 struct snd_soc_pcm_runtime *be, 64 int stream, 65 const enum snd_soc_dpcm_state *states, 66 int num_states) 67 { 68 struct snd_soc_dpcm *dpcm; 69 int state; 70 int ret = 1; 71 int i; 72 73 for_each_dpcm_fe(be, stream, dpcm) { 74 75 if (dpcm->fe == fe) 76 continue; 77 78 state = dpcm->fe->dpcm[stream].state; 79 for (i = 0; i < num_states; i++) { 80 if (state == states[i]) { 81 ret = 0; 82 break; 83 } 84 } 85 } 86 87 /* it's safe to do this BE DAI */ 88 return ret; 89 } 90 91 /* 92 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 93 * are not running, paused or suspended for the specified stream direction. 94 */ 95 static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 96 struct snd_soc_pcm_runtime *be, int stream) 97 { 98 const enum snd_soc_dpcm_state state[] = { 99 SND_SOC_DPCM_STATE_START, 100 SND_SOC_DPCM_STATE_PAUSED, 101 SND_SOC_DPCM_STATE_SUSPEND, 102 }; 103 104 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 105 } 106 107 /* 108 * We can only change hw params a BE DAI if any of it's FE are not prepared, 109 * running, paused or suspended for the specified stream direction. 110 */ 111 static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 112 struct snd_soc_pcm_runtime *be, int stream) 113 { 114 const enum snd_soc_dpcm_state state[] = { 115 SND_SOC_DPCM_STATE_START, 116 SND_SOC_DPCM_STATE_PAUSED, 117 SND_SOC_DPCM_STATE_SUSPEND, 118 SND_SOC_DPCM_STATE_PREPARE, 119 }; 120 121 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 122 } 123 124 /* 125 * We can only prepare a BE DAI if any of it's FE are not prepared, 126 * running or paused for the specified stream direction. 127 */ 128 static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 129 struct snd_soc_pcm_runtime *be, int stream) 130 { 131 const enum snd_soc_dpcm_state state[] = { 132 SND_SOC_DPCM_STATE_START, 133 SND_SOC_DPCM_STATE_PAUSED, 134 SND_SOC_DPCM_STATE_PREPARE, 135 }; 136 137 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 138 } 139 140 #define DPCM_MAX_BE_USERS 8 141 142 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 143 { 144 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 145 } 146 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 147 { 148 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec"; 149 } 150 151 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 152 { 153 switch (state) { 154 case SND_SOC_DPCM_STATE_NEW: 155 return "new"; 156 case SND_SOC_DPCM_STATE_OPEN: 157 return "open"; 158 case SND_SOC_DPCM_STATE_HW_PARAMS: 159 return "hw_params"; 160 case SND_SOC_DPCM_STATE_PREPARE: 161 return "prepare"; 162 case SND_SOC_DPCM_STATE_START: 163 return "start"; 164 case SND_SOC_DPCM_STATE_STOP: 165 return "stop"; 166 case SND_SOC_DPCM_STATE_SUSPEND: 167 return "suspend"; 168 case SND_SOC_DPCM_STATE_PAUSED: 169 return "paused"; 170 case SND_SOC_DPCM_STATE_HW_FREE: 171 return "hw_free"; 172 case SND_SOC_DPCM_STATE_CLOSE: 173 return "close"; 174 } 175 176 return "unknown"; 177 } 178 179 #ifdef CONFIG_DEBUG_FS 180 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 181 int stream, char *buf, size_t size) 182 { 183 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 184 struct snd_soc_dpcm *dpcm; 185 ssize_t offset = 0; 186 187 /* FE state */ 188 offset += scnprintf(buf + offset, size - offset, 189 "[%s - %s]\n", fe->dai_link->name, 190 stream ? "Capture" : "Playback"); 191 192 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 193 dpcm_state_string(fe->dpcm[stream].state)); 194 195 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 196 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 197 offset += scnprintf(buf + offset, size - offset, 198 "Hardware Params: " 199 "Format = %s, Channels = %d, Rate = %d\n", 200 snd_pcm_format_name(params_format(params)), 201 params_channels(params), 202 params_rate(params)); 203 204 /* BEs state */ 205 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 206 207 if (list_empty(&fe->dpcm[stream].be_clients)) { 208 offset += scnprintf(buf + offset, size - offset, 209 " No active DSP links\n"); 210 goto out; 211 } 212 213 for_each_dpcm_be(fe, stream, dpcm) { 214 struct snd_soc_pcm_runtime *be = dpcm->be; 215 params = &be->dpcm[stream].hw_params; 216 217 offset += scnprintf(buf + offset, size - offset, 218 "- %s\n", be->dai_link->name); 219 220 offset += scnprintf(buf + offset, size - offset, 221 " State: %s\n", 222 dpcm_state_string(be->dpcm[stream].state)); 223 224 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 225 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 226 offset += scnprintf(buf + offset, size - offset, 227 " Hardware Params: " 228 "Format = %s, Channels = %d, Rate = %d\n", 229 snd_pcm_format_name(params_format(params)), 230 params_channels(params), 231 params_rate(params)); 232 } 233 out: 234 return offset; 235 } 236 237 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 238 size_t count, loff_t *ppos) 239 { 240 struct snd_soc_pcm_runtime *fe = file->private_data; 241 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 242 int stream; 243 char *buf; 244 245 if (fe->dai_link->num_cpus > 1) 246 return snd_soc_ret(fe->dev, -EINVAL, 247 "%s doesn't support Multi CPU yet\n", __func__); 248 249 buf = kmalloc(out_count, GFP_KERNEL); 250 if (!buf) 251 return -ENOMEM; 252 253 snd_soc_dpcm_mutex_lock(fe); 254 for_each_pcm_streams(stream) 255 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream)) 256 offset += dpcm_show_state(fe, stream, 257 buf + offset, 258 out_count - offset); 259 snd_soc_dpcm_mutex_unlock(fe); 260 261 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 262 263 kfree(buf); 264 return ret; 265 } 266 267 static const struct file_operations dpcm_state_fops = { 268 .open = simple_open, 269 .read = dpcm_state_read_file, 270 .llseek = default_llseek, 271 }; 272 273 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 274 { 275 if (!rtd->dai_link->dynamic) 276 return; 277 278 if (!rtd->card->debugfs_card_root) 279 return; 280 281 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 282 rtd->card->debugfs_card_root); 283 284 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 285 rtd, &dpcm_state_fops); 286 } 287 288 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 289 { 290 char *name; 291 292 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 293 snd_pcm_direction_name(stream)); 294 if (name) { 295 dpcm->debugfs_state = debugfs_create_dir( 296 name, dpcm->fe->debugfs_dpcm_root); 297 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 298 &dpcm->state); 299 kfree(name); 300 } 301 } 302 303 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 304 { 305 debugfs_remove_recursive(dpcm->debugfs_state); 306 } 307 308 #else 309 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 310 int stream) 311 { 312 } 313 314 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 315 { 316 } 317 #endif 318 319 /* Set FE's runtime_update state; the state is protected via PCM stream lock 320 * for avoiding the race with trigger callback. 321 * If the state is unset and a trigger is pending while the previous operation, 322 * process the pending trigger action here. 323 */ 324 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 325 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 326 int stream, enum snd_soc_dpcm_update state) 327 { 328 struct snd_pcm_substream *substream = 329 snd_soc_dpcm_get_substream(fe, stream); 330 331 snd_pcm_stream_lock_irq(substream); 332 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 333 dpcm_fe_dai_do_trigger(substream, 334 fe->dpcm[stream].trigger_pending - 1); 335 fe->dpcm[stream].trigger_pending = 0; 336 } 337 fe->dpcm[stream].runtime_update = state; 338 snd_pcm_stream_unlock_irq(substream); 339 } 340 341 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 342 int stream, enum snd_soc_dpcm_update state) 343 { 344 be->dpcm[stream].runtime_update = state; 345 } 346 347 /** 348 * snd_soc_runtime_action() - Increment/Decrement active count for 349 * PCM runtime components 350 * @rtd: ASoC PCM runtime that is activated 351 * @stream: Direction of the PCM stream 352 * @action: Activate stream if 1. Deactivate if -1. 353 * 354 * Increments/Decrements the active count for all the DAIs and components 355 * attached to a PCM runtime. 356 * Should typically be called when a stream is opened. 357 * 358 * Must be called with the rtd->card->pcm_mutex being held 359 */ 360 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 361 int stream, int action) 362 { 363 struct snd_soc_component *component; 364 struct snd_soc_dai *dai; 365 int i; 366 367 snd_soc_dpcm_mutex_assert_held(rtd); 368 369 for_each_rtd_dais(rtd, i, dai) 370 snd_soc_dai_action(dai, stream, action); 371 372 /* Increments/Decrements the active count for components without DAIs */ 373 for_each_rtd_components(rtd, i, component) { 374 if (component->num_dai) 375 continue; 376 component->active += action; 377 } 378 } 379 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 380 381 /** 382 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 383 * @rtd: The ASoC PCM runtime that should be checked. 384 * 385 * This function checks whether the power down delay should be ignored for a 386 * specific PCM runtime. Returns true if the delay is 0, if the DAI link has 387 * been configured to ignore the delay, or if none of the components benefits 388 * from having the delay. 389 */ 390 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 391 { 392 struct snd_soc_component *component; 393 int i; 394 395 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 396 return true; 397 398 for_each_rtd_components(rtd, i, component) 399 if (component->driver->use_pmdown_time) 400 /* No need to go through all components */ 401 return false; 402 403 return true; 404 } 405 406 /* DPCM stream event, send event to FE and all active BEs. */ 407 void dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, int event) 408 { 409 struct snd_soc_dpcm *dpcm; 410 411 snd_soc_dpcm_mutex_assert_held(fe); 412 413 for_each_dpcm_be(fe, dir, dpcm) { 414 415 struct snd_soc_pcm_runtime *be = dpcm->be; 416 417 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 418 be->dai_link->name, event, dir); 419 420 if ((event == SND_SOC_DAPM_STREAM_STOP) && 421 (be->dpcm[dir].users >= 1)) 422 continue; 423 424 snd_soc_dapm_stream_event(be, dir, event); 425 } 426 427 snd_soc_dapm_stream_event(fe, dir, event); 428 } 429 430 void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 431 struct snd_pcm_hw_params *params) 432 { 433 if (params) { 434 dai->symmetric_rate = params_rate(params); 435 dai->symmetric_channels = params_channels(params); 436 dai->symmetric_sample_bits = snd_pcm_format_physical_width(params_format(params)); 437 } else { 438 dai->symmetric_rate = 0; 439 dai->symmetric_channels = 0; 440 dai->symmetric_sample_bits = 0; 441 } 442 } 443 444 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 445 struct snd_soc_dai *soc_dai) 446 { 447 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 448 int ret; 449 450 if (!snd_soc_dai_active(soc_dai)) 451 return 0; 452 453 #define __soc_pcm_apply_symmetry(name, NAME) \ 454 if (soc_dai->symmetric_##name && \ 455 (soc_dai->driver->symmetric_##name || rtd->dai_link->symmetric_##name)) { \ 456 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 457 #name, soc_dai->symmetric_##name); \ 458 \ 459 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 460 SNDRV_PCM_HW_PARAM_##NAME,\ 461 soc_dai->symmetric_##name); \ 462 if (ret < 0) \ 463 return snd_soc_ret(soc_dai->dev, ret, \ 464 "Unable to apply %s constraint\n", #name); \ 465 } 466 467 __soc_pcm_apply_symmetry(rate, RATE); 468 __soc_pcm_apply_symmetry(channels, CHANNELS); 469 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 470 471 return 0; 472 } 473 474 /* 475 * Shared BCLK constraint: when multiple DAIs share the same physical BCLK, 476 * constrain hw_params so that the BCLK rate (rate * channels * sample_bits, 477 * or rate * slots * slot_width for TDM) remains consistent. 478 */ 479 480 static int soc_pcm_shared_bclk_rule_rate(struct snd_pcm_hw_params *params, 481 struct snd_pcm_hw_rule *rule) 482 { 483 struct snd_soc_dai *dai = rule->private; 484 struct snd_soc_card *card = dai->component->card; 485 struct snd_soc_pcm_runtime *rtd; 486 struct snd_soc_dai *other_dai; 487 unsigned long active_bclk_rate = 0; 488 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 489 struct snd_interval constraint = { .empty = 1 }; 490 unsigned int target_rate; 491 int i; 492 493 /* Protect the rtd list traversal with the ASoC card mutex helper. */ 494 guard(snd_soc_card_mutex)(card); 495 496 /* Scan all DAIs on the card for an active peer sharing the same BCLK */ 497 for_each_card_rtds(card, rtd) { 498 for_each_rtd_cpu_dais(rtd, i, other_dai) { 499 if (other_dai == dai) 500 continue; 501 if (!other_dai->bclk) 502 continue; 503 if (!snd_soc_dai_active(other_dai)) 504 continue; 505 /* 506 * Skip peers whose hw_params hasn't run yet. 507 * symmetric_rate is set by soc_pcm_set_dai_params() 508 * after snd_soc_dai_hw_params(), so non-zero means 509 * the DAI's clk_set_rate() has already executed. 510 */ 511 if (!other_dai->symmetric_rate) 512 continue; 513 if (!clk_is_match(dai->bclk, other_dai->bclk)) 514 continue; 515 516 active_bclk_rate = clk_get_rate(other_dai->bclk); 517 if (active_bclk_rate) 518 goto found; 519 } 520 } 521 522 return 0; 523 524 found: 525 if (dai->bclk_ratio) { 526 /* 527 * Driver has set an explicit BCLK ratio (e.g. for TDM where 528 * BCLK = rate * slots * slot_width). The only valid rate is 529 * active_bclk_rate / bclk_ratio. 530 */ 531 target_rate = active_bclk_rate / dai->bclk_ratio; 532 533 constraint.min = target_rate; 534 constraint.max = target_rate; 535 } else { 536 struct snd_interval *channels = hw_param_interval(params, 537 SNDRV_PCM_HW_PARAM_CHANNELS); 538 struct snd_interval *sample_bits = hw_param_interval(params, 539 SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 540 541 /* 542 * Default: BCLK = rate * channels * sample_bits. 543 * Calculate the range of valid rates given the current 544 * channel and sample_bits intervals. 545 */ 546 if (!channels->min || !sample_bits->min) 547 return 0; 548 549 constraint.max = active_bclk_rate / 550 ((unsigned long)channels->min * sample_bits->min); 551 552 if (channels->max && sample_bits->max) 553 constraint.min = active_bclk_rate / 554 ((unsigned long)channels->max * sample_bits->max); 555 else 556 constraint.min = constraint.max; 557 } 558 559 constraint.integer = 1; 560 constraint.empty = 0; 561 562 return snd_interval_refine(rate, &constraint); 563 } 564 565 static int soc_pcm_apply_shared_bclk(struct snd_pcm_substream *substream, 566 struct snd_soc_dai *dai) 567 { 568 if (!dai->bclk) 569 return 0; 570 571 dev_dbg(dai->dev, 572 "ASoC: registering shared BCLK rate constraint\n"); 573 574 return snd_pcm_hw_rule_add(substream->runtime, 0, 575 SNDRV_PCM_HW_PARAM_RATE, 576 soc_pcm_shared_bclk_rule_rate, dai, 577 SNDRV_PCM_HW_PARAM_CHANNELS, 578 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 579 -1); 580 } 581 582 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 583 struct snd_pcm_hw_params *params) 584 { 585 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 586 struct snd_soc_dai d; 587 struct snd_soc_dai *dai; 588 struct snd_soc_dai *cpu_dai; 589 unsigned int symmetry, i; 590 591 d.name = __func__; 592 soc_pcm_set_dai_params(&d, params); 593 594 #define __soc_pcm_params_symmetry(xxx) \ 595 symmetry = rtd->dai_link->symmetric_##xxx; \ 596 for_each_rtd_dais(rtd, i, dai) \ 597 symmetry |= dai->driver->symmetric_##xxx; \ 598 \ 599 if (symmetry) \ 600 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 601 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 602 cpu_dai->symmetric_##xxx && \ 603 cpu_dai->symmetric_##xxx != d.symmetric_##xxx) \ 604 return snd_soc_ret(rtd->dev, -EINVAL, \ 605 "unmatched %s symmetry: %s:%d - %s:%d\n", \ 606 #xxx, cpu_dai->name, cpu_dai->symmetric_##xxx, \ 607 d.name, d.symmetric_##xxx); 608 609 /* reject unmatched parameters when applying symmetry */ 610 __soc_pcm_params_symmetry(rate); 611 __soc_pcm_params_symmetry(channels); 612 __soc_pcm_params_symmetry(sample_bits); 613 614 return 0; 615 } 616 617 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 618 { 619 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 620 struct snd_soc_dai_link *link = rtd->dai_link; 621 struct snd_soc_dai *dai; 622 unsigned int symmetry, i; 623 624 symmetry = link->symmetric_rate || 625 link->symmetric_channels || 626 link->symmetric_sample_bits; 627 628 for_each_rtd_dais(rtd, i, dai) 629 symmetry = symmetry || 630 dai->driver->symmetric_rate || 631 dai->driver->symmetric_channels || 632 dai->driver->symmetric_sample_bits; 633 634 if (symmetry) 635 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 636 } 637 638 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 639 { 640 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 641 int ret; 642 643 if (!bits) 644 return; 645 646 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 647 if (ret != 0) 648 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 649 bits, ret); 650 } 651 652 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 653 { 654 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 655 struct snd_soc_dai *cpu_dai; 656 struct snd_soc_dai *codec_dai; 657 int stream = substream->stream; 658 int i; 659 unsigned int bits = 0, cpu_bits = 0; 660 661 for_each_rtd_codec_dais(rtd, i, codec_dai) { 662 const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 663 664 if (pcm_codec->sig_bits == 0) { 665 bits = 0; 666 break; 667 } 668 bits = max(pcm_codec->sig_bits, bits); 669 } 670 671 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 672 const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 673 674 if (pcm_cpu->sig_bits == 0) { 675 cpu_bits = 0; 676 break; 677 } 678 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 679 } 680 681 soc_pcm_set_msb(substream, bits); 682 soc_pcm_set_msb(substream, cpu_bits); 683 } 684 685 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw, bool force) 686 { 687 if (force) { 688 hw->rates = UINT_MAX; 689 hw->rate_min = 0; 690 hw->rate_max = UINT_MAX; 691 hw->channels_min = 0; 692 hw->channels_max = UINT_MAX; 693 hw->formats = ULLONG_MAX; 694 } else { 695 /* Preserve initialized parameters */ 696 if (!hw->rates) 697 hw->rates = UINT_MAX; 698 if (!hw->rate_max) 699 hw->rate_max = UINT_MAX; 700 if (!hw->channels_max) 701 hw->channels_max = UINT_MAX; 702 if (!hw->formats) 703 hw->formats = ULLONG_MAX; 704 } 705 } 706 707 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 708 const struct snd_soc_pcm_stream *p) 709 { 710 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 711 712 /* setup hw->rate_min/max via hw->rates first */ 713 snd_pcm_hw_limit_rates(hw); 714 715 /* update hw->rate_min/max by snd_soc_pcm_stream */ 716 hw->rate_min = max(hw->rate_min, p->rate_min); 717 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 718 } 719 720 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 721 const struct snd_soc_pcm_stream *p) 722 { 723 hw->channels_min = max(hw->channels_min, p->channels_min); 724 hw->channels_max = min(hw->channels_max, p->channels_max); 725 } 726 727 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 728 const struct snd_soc_pcm_stream *p) 729 { 730 hw->formats &= p->formats; 731 hw->subformats &= p->subformats; 732 } 733 734 /** 735 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 736 * @rtd: ASoC PCM runtime 737 * @hw: PCM hardware parameters (output) 738 * @stream: Direction of the PCM stream 739 * 740 * Calculates the subset of stream parameters supported by all DAIs 741 * associated with the PCM stream. 742 */ 743 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 744 struct snd_pcm_hardware *hw, int stream) 745 { 746 struct snd_soc_dai *codec_dai; 747 struct snd_soc_dai *cpu_dai; 748 const struct snd_soc_pcm_stream *codec_stream; 749 const struct snd_soc_pcm_stream *cpu_stream; 750 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 751 int i; 752 753 soc_pcm_hw_init(hw, true); 754 755 /* first calculate min/max only for CPUs in the DAI link */ 756 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 757 758 /* 759 * Skip CPUs which don't support the current stream type. 760 * Otherwise, since the rate, channel, and format values will 761 * zero in that case, we would have no usable settings left, 762 * causing the resulting setup to fail. 763 */ 764 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 765 continue; 766 767 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 768 769 soc_pcm_hw_update_chan(hw, cpu_stream); 770 soc_pcm_hw_update_rate(hw, cpu_stream); 771 soc_pcm_hw_update_format(hw, cpu_stream); 772 } 773 cpu_chan_min = hw->channels_min; 774 cpu_chan_max = hw->channels_max; 775 776 /* second calculate min/max only for CODECs in the DAI link */ 777 for_each_rtd_codec_dais(rtd, i, codec_dai) { 778 779 /* 780 * Skip CODECs which don't support the current stream type. 781 * Otherwise, since the rate, channel, and format values will 782 * zero in that case, we would have no usable settings left, 783 * causing the resulting setup to fail. 784 */ 785 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 786 continue; 787 788 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 789 790 soc_pcm_hw_update_chan(hw, codec_stream); 791 soc_pcm_hw_update_rate(hw, codec_stream); 792 soc_pcm_hw_update_format(hw, codec_stream); 793 } 794 795 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 796 if (!hw->channels_min) 797 return -EINVAL; 798 799 /* 800 * chan min/max cannot be enforced if there are multiple CODEC DAIs 801 * connected to CPU DAI(s), use CPU DAI's directly and let 802 * channel allocation be fixed up later 803 */ 804 if (rtd->dai_link->num_codecs > 1) { 805 hw->channels_min = cpu_chan_min; 806 hw->channels_max = cpu_chan_max; 807 } 808 809 return 0; 810 } 811 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 812 813 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 814 { 815 struct snd_pcm_hardware *hw = &substream->runtime->hw; 816 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 817 u64 formats = hw->formats; 818 819 /* 820 * At least one CPU and one CODEC should match. Otherwise, we should 821 * have bailed out on a higher level, since there would be no CPU or 822 * CODEC to support the transfer direction in that case. 823 */ 824 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 825 826 if (formats) 827 hw->formats &= formats; 828 } 829 830 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 831 { 832 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 833 struct snd_soc_component *component; 834 int i, ret = 0; 835 836 for_each_rtd_components(rtd, i, component) { 837 ret = snd_soc_component_module_get_when_open(component, substream); 838 if (ret < 0) 839 break; 840 841 ret = snd_soc_component_open(component, substream); 842 if (ret < 0) 843 break; 844 } 845 846 return ret; 847 } 848 849 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 850 int rollback) 851 { 852 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 853 struct snd_soc_component *component; 854 int i, ret = 0; 855 856 for_each_rtd_components(rtd, i, component) { 857 int r = snd_soc_component_close(component, substream, rollback); 858 if (r < 0) 859 ret = r; /* use last ret */ 860 861 snd_soc_component_module_put_when_close(component, substream, rollback); 862 } 863 864 return ret; 865 } 866 867 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 868 struct snd_pcm_substream *substream, int rollback) 869 { 870 struct snd_soc_component *component; 871 struct snd_soc_dai *dai; 872 int i; 873 874 snd_soc_dpcm_mutex_assert_held(rtd); 875 876 if (!rollback) { 877 snd_soc_runtime_deactivate(rtd, substream->stream); 878 879 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 880 for_each_rtd_dais(rtd, i, dai) { 881 if (snd_soc_dai_active(dai) == 0) 882 soc_pcm_set_dai_params(dai, NULL); 883 } 884 } 885 886 for_each_rtd_dais_reverse(rtd, i, dai) 887 snd_soc_dai_shutdown(dai, substream, rollback); 888 889 snd_soc_link_shutdown(substream, rollback); 890 891 soc_pcm_components_close(substream, rollback); 892 893 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 894 895 for_each_rtd_components(rtd, i, component) 896 if (!snd_soc_component_active(component)) 897 pinctrl_pm_select_sleep_state(component->dev); 898 899 return 0; 900 } 901 902 /* 903 * Called by ALSA when a PCM substream is closed. Private data can be 904 * freed here. The cpu DAI, codec DAI, machine and components are also 905 * shutdown. 906 */ 907 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 908 struct snd_pcm_substream *substream) 909 { 910 return soc_pcm_clean(rtd, substream, 0); 911 } 912 913 /* PCM close ops for non-DPCM streams */ 914 static int soc_pcm_close(struct snd_pcm_substream *substream) 915 { 916 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 917 918 snd_soc_dpcm_mutex_lock(rtd); 919 __soc_pcm_close(rtd, substream); 920 snd_soc_dpcm_mutex_unlock(rtd); 921 return 0; 922 } 923 924 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 925 { 926 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 927 struct snd_pcm_hardware *hw = &substream->runtime->hw; 928 const char *name_cpu = soc_cpu_dai_name(rtd); 929 const char *name_codec = soc_codec_dai_name(rtd); 930 const char *err_msg; 931 struct device *dev = rtd->dev; 932 933 err_msg = "rates"; 934 if (!hw->rates) 935 goto config_err; 936 937 err_msg = "formats"; 938 if (!hw->formats) 939 goto config_err; 940 941 err_msg = "channels"; 942 if (!hw->channels_min || !hw->channels_max || 943 hw->channels_min > hw->channels_max) 944 goto config_err; 945 946 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 947 name_cpu); 948 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 949 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 950 hw->channels_max); 951 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 952 hw->rate_max); 953 954 return 0; 955 956 config_err: 957 return snd_soc_ret(dev, -EINVAL, 958 "%s <-> %s No matching %s\n", name_codec, name_cpu, err_msg); 959 } 960 961 /* 962 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 963 * then initialized and any private data can be allocated. This also calls 964 * startup for the cpu DAI, component, machine and codec DAI. 965 */ 966 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 967 struct snd_pcm_substream *substream) 968 { 969 struct snd_soc_component *component; 970 struct snd_soc_dai *dai; 971 int i, ret = 0; 972 973 snd_soc_dpcm_mutex_assert_held(rtd); 974 975 for_each_rtd_components(rtd, i, component) 976 pinctrl_pm_select_default_state(component->dev); 977 978 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 979 if (ret < 0) 980 goto err; 981 982 ret = soc_pcm_components_open(substream); 983 if (ret < 0) 984 goto err; 985 986 ret = snd_soc_link_startup(substream); 987 if (ret < 0) 988 goto err; 989 990 /* startup the audio subsystem */ 991 for_each_rtd_dais(rtd, i, dai) { 992 ret = snd_soc_dai_startup(dai, substream); 993 if (ret < 0) 994 goto err; 995 } 996 997 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 998 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 999 goto dynamic; 1000 1001 /* Check that the codec and cpu DAIs are compatible */ 1002 soc_pcm_init_runtime_hw(substream); 1003 1004 soc_pcm_update_symmetry(substream); 1005 1006 ret = soc_hw_sanity_check(substream); 1007 if (ret < 0) 1008 goto err; 1009 1010 soc_pcm_apply_msb(substream); 1011 1012 /* Symmetry only applies if we've already got an active stream. */ 1013 for_each_rtd_dais(rtd, i, dai) { 1014 ret = soc_pcm_apply_symmetry(substream, dai); 1015 if (ret != 0) 1016 goto err; 1017 } 1018 1019 /* Shared BCLK constraint across DAIs on the same card */ 1020 for_each_rtd_cpu_dais(rtd, i, dai) { 1021 ret = soc_pcm_apply_shared_bclk(substream, dai); 1022 if (ret != 0) 1023 goto err; 1024 } 1025 dynamic: 1026 snd_soc_runtime_activate(rtd, substream->stream); 1027 ret = 0; 1028 err: 1029 if (ret < 0) 1030 soc_pcm_clean(rtd, substream, 1); 1031 1032 return soc_pcm_ret(rtd, ret); 1033 } 1034 1035 /* PCM open ops for non-DPCM streams */ 1036 static int soc_pcm_open(struct snd_pcm_substream *substream) 1037 { 1038 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1039 int ret; 1040 1041 snd_soc_dpcm_mutex_lock(rtd); 1042 ret = __soc_pcm_open(rtd, substream); 1043 snd_soc_dpcm_mutex_unlock(rtd); 1044 return ret; 1045 } 1046 1047 /* 1048 * Called by ALSA when the PCM substream is prepared, can set format, sample 1049 * rate, etc. This function is non atomic and can be called multiple times, 1050 * it can refer to the runtime info. 1051 */ 1052 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 1053 struct snd_pcm_substream *substream) 1054 { 1055 struct snd_soc_dai *dai; 1056 int i, ret = 0; 1057 1058 snd_soc_dpcm_mutex_assert_held(rtd); 1059 1060 ret = snd_soc_link_prepare(substream); 1061 if (ret < 0) 1062 goto out; 1063 1064 ret = snd_soc_pcm_component_prepare(substream); 1065 if (ret < 0) 1066 goto out; 1067 1068 ret = snd_soc_pcm_dai_prepare(substream); 1069 if (ret < 0) 1070 goto out; 1071 1072 /* cancel any delayed stream shutdown that is pending */ 1073 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1074 rtd->pop_wait) { 1075 rtd->pop_wait = 0; 1076 cancel_delayed_work(&rtd->delayed_work); 1077 } 1078 1079 snd_soc_dapm_stream_event(rtd, substream->stream, 1080 SND_SOC_DAPM_STREAM_START); 1081 1082 for_each_rtd_dais(rtd, i, dai) { 1083 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1084 snd_soc_dai_digital_mute(dai, 0, substream->stream); 1085 } 1086 1087 out: 1088 /* 1089 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 1090 * 1091 * We don't want to log an error since we do not want to give userspace a way to do a 1092 * denial-of-service attack on the syslog / diskspace. 1093 */ 1094 return ret; 1095 } 1096 1097 /* PCM prepare ops for non-DPCM streams */ 1098 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 1099 { 1100 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1101 int ret; 1102 1103 snd_soc_dpcm_mutex_lock(rtd); 1104 ret = __soc_pcm_prepare(rtd, substream); 1105 snd_soc_dpcm_mutex_unlock(rtd); 1106 1107 /* 1108 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 1109 * 1110 * We don't want to log an error since we do not want to give userspace a way to do a 1111 * denial-of-service attack on the syslog / diskspace. 1112 */ 1113 return ret; 1114 } 1115 1116 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 1117 unsigned int mask) 1118 { 1119 struct snd_interval *interval; 1120 int channels = hweight_long(mask); 1121 1122 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 1123 interval->min = channels; 1124 interval->max = channels; 1125 } 1126 1127 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 1128 struct snd_pcm_substream *substream, int rollback) 1129 { 1130 struct snd_soc_dai *dai; 1131 int i; 1132 1133 snd_soc_dpcm_mutex_assert_held(rtd); 1134 1135 /* clear the corresponding DAIs parameters when going to be inactive */ 1136 for_each_rtd_dais(rtd, i, dai) { 1137 if (snd_soc_dai_active(dai) == 1) 1138 soc_pcm_set_dai_params(dai, NULL); 1139 1140 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { 1141 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1142 snd_soc_dai_digital_mute(dai, 1, substream->stream); 1143 } 1144 } 1145 1146 /* run the stream event */ 1147 snd_soc_dapm_stream_stop(rtd, substream->stream); 1148 1149 /* free any machine hw params */ 1150 snd_soc_link_hw_free(substream, rollback); 1151 1152 /* free any component resources */ 1153 snd_soc_pcm_component_hw_free(substream, rollback); 1154 1155 /* now free hw params for the DAIs */ 1156 for_each_rtd_dais(rtd, i, dai) 1157 if (snd_soc_dai_stream_valid(dai, substream->stream)) 1158 snd_soc_dai_hw_free(dai, substream, rollback); 1159 1160 return 0; 1161 } 1162 1163 /* 1164 * Frees resources allocated by hw_params, can be called multiple times 1165 */ 1166 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 1167 struct snd_pcm_substream *substream) 1168 { 1169 return soc_pcm_hw_clean(rtd, substream, 0); 1170 } 1171 1172 /* hw_free PCM ops for non-DPCM streams */ 1173 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 1174 { 1175 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1176 int ret; 1177 1178 snd_soc_dpcm_mutex_lock(rtd); 1179 ret = __soc_pcm_hw_free(rtd, substream); 1180 snd_soc_dpcm_mutex_unlock(rtd); 1181 return ret; 1182 } 1183 1184 /* 1185 * Called by ALSA when the hardware params are set by application. This 1186 * function can also be called multiple times and can allocate buffers 1187 * (using snd_pcm_lib_* ). It's non-atomic. 1188 */ 1189 static int __soc_pcm_hw_params(struct snd_pcm_substream *substream, 1190 struct snd_pcm_hw_params *params) 1191 { 1192 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1193 struct snd_soc_dai *cpu_dai; 1194 struct snd_soc_dai *codec_dai; 1195 struct snd_pcm_hw_params tmp_params; 1196 int i, ret = 0; 1197 1198 snd_soc_dpcm_mutex_assert_held(rtd); 1199 1200 ret = soc_pcm_params_symmetry(substream, params); 1201 if (ret) 1202 goto out; 1203 1204 ret = snd_soc_link_hw_params(substream, params); 1205 if (ret < 0) 1206 goto out; 1207 1208 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1209 unsigned int ch_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1210 struct snd_soc_dai_link_ch_map *ch_maps; 1211 int j; 1212 1213 /* 1214 * Skip CODECs which don't support the current stream type, 1215 * the idea being that if a CODEC is not used for the currently 1216 * set up transfer direction, it should not need to be 1217 * configured, especially since the configuration used might 1218 * not even be supported by that CODEC. There may be cases 1219 * however where a CODEC needs to be set up although it is 1220 * actually not being used for the transfer, e.g. if a 1221 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1222 * for the DAI link including a playback-only CODEC. 1223 * If this becomes necessary, we will have to augment the 1224 * machine driver setup with information on how to act, so 1225 * we can do the right thing here. 1226 */ 1227 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1228 continue; 1229 1230 /* copy params for each codec */ 1231 tmp_params = *params; 1232 1233 /* fixup params based on TDM or ch_map masks */ 1234 if (!ch_mask) { 1235 for_each_rtd_ch_maps(rtd, j, ch_maps) 1236 if (ch_maps->codec == i) 1237 ch_mask |= ch_maps->codec_ch_mask; 1238 } 1239 1240 if (ch_mask) 1241 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1242 1243 ret = snd_soc_dai_hw_params(codec_dai, substream, 1244 &tmp_params); 1245 if(ret < 0) 1246 goto out; 1247 1248 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1249 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1250 } 1251 1252 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1253 struct snd_soc_dai_link_ch_map *ch_maps; 1254 unsigned int ch_mask = 0; 1255 int j; 1256 1257 /* 1258 * Skip CPUs which don't support the current stream 1259 * type. See soc_pcm_init_runtime_hw() for more details 1260 */ 1261 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1262 continue; 1263 1264 /* copy params for each cpu */ 1265 tmp_params = *params; 1266 1267 /* 1268 * construct cpu channel mask by combining ch_mask of each 1269 * codec which maps to the cpu. 1270 * see 1271 * soc.h :: [dai_link->ch_maps Image sample] 1272 */ 1273 for_each_rtd_ch_maps(rtd, j, ch_maps) 1274 if (ch_maps->cpu == i) 1275 ch_mask |= ch_maps->cpu_ch_mask; 1276 1277 /* fixup cpu channel number */ 1278 if (ch_mask) 1279 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1280 1281 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1282 if (ret < 0) 1283 goto out; 1284 1285 /* store the parameters for each DAI */ 1286 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1287 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1288 } 1289 1290 ret = snd_soc_pcm_component_hw_params(substream, params); 1291 out: 1292 if (ret < 0) 1293 soc_pcm_hw_clean(rtd, substream, 1); 1294 1295 return soc_pcm_ret(rtd, ret); 1296 } 1297 1298 /* hw_params PCM ops for non-DPCM streams */ 1299 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1300 struct snd_pcm_hw_params *params) 1301 { 1302 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1303 int ret; 1304 1305 snd_soc_dpcm_mutex_lock(rtd); 1306 ret = __soc_pcm_hw_params(substream, params); 1307 snd_soc_dpcm_mutex_unlock(rtd); 1308 return ret; 1309 } 1310 1311 #define TRIGGER_MAX 3 1312 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1313 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1314 snd_soc_link_trigger, 1315 snd_soc_pcm_component_trigger, 1316 snd_soc_pcm_dai_trigger, 1317 }, 1318 [SND_SOC_TRIGGER_ORDER_LDC] = { 1319 snd_soc_link_trigger, 1320 snd_soc_pcm_dai_trigger, 1321 snd_soc_pcm_component_trigger, 1322 }, 1323 }; 1324 1325 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1326 { 1327 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1328 struct snd_soc_component *component; 1329 int ret = 0, r = 0, i; 1330 int rollback = 0; 1331 int start = 0, stop = 0; 1332 1333 /* 1334 * select START/STOP sequence 1335 */ 1336 for_each_rtd_components(rtd, i, component) { 1337 if (component->driver->trigger_start) 1338 start = component->driver->trigger_start; 1339 if (component->driver->trigger_stop) 1340 stop = component->driver->trigger_stop; 1341 } 1342 if (rtd->dai_link->trigger_start) 1343 start = rtd->dai_link->trigger_start; 1344 if (rtd->dai_link->trigger_stop) 1345 stop = rtd->dai_link->trigger_stop; 1346 1347 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1348 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1349 return -EINVAL; 1350 1351 /* 1352 * START 1353 */ 1354 switch (cmd) { 1355 case SNDRV_PCM_TRIGGER_START: 1356 case SNDRV_PCM_TRIGGER_RESUME: 1357 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1358 for (i = 0; i < TRIGGER_MAX; i++) { 1359 r = trigger[start][i](substream, cmd, 0); 1360 if (r < 0) 1361 break; 1362 } 1363 } 1364 1365 /* 1366 * Rollback if START failed 1367 * find correspond STOP command 1368 */ 1369 if (r < 0) { 1370 rollback = 1; 1371 ret = r; 1372 switch (cmd) { 1373 case SNDRV_PCM_TRIGGER_START: 1374 cmd = SNDRV_PCM_TRIGGER_STOP; 1375 break; 1376 case SNDRV_PCM_TRIGGER_RESUME: 1377 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1378 break; 1379 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1380 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1381 break; 1382 } 1383 } 1384 1385 /* 1386 * STOP 1387 */ 1388 switch (cmd) { 1389 case SNDRV_PCM_TRIGGER_STOP: 1390 case SNDRV_PCM_TRIGGER_SUSPEND: 1391 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1392 for (i = TRIGGER_MAX; i > 0; i--) { 1393 r = trigger[stop][i - 1](substream, cmd, rollback); 1394 if (r < 0) 1395 ret = r; 1396 } 1397 } 1398 1399 return ret; 1400 } 1401 1402 /* 1403 * soc level wrapper for pointer callback 1404 * If cpu_dai, codec_dai, component driver has the delay callback, then 1405 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1406 */ 1407 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1408 { 1409 struct snd_pcm_runtime *runtime = substream->runtime; 1410 snd_pcm_uframes_t offset = 0; 1411 snd_pcm_sframes_t codec_delay = 0; 1412 snd_pcm_sframes_t cpu_delay = 0; 1413 1414 offset = snd_soc_pcm_component_pointer(substream); 1415 1416 /* should be called *after* snd_soc_pcm_component_pointer() */ 1417 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1418 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1419 1420 runtime->delay = cpu_delay + codec_delay; 1421 1422 return offset; 1423 } 1424 1425 /* connect a FE and BE */ 1426 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1427 struct snd_soc_pcm_runtime *be, int stream) 1428 { 1429 struct snd_pcm_substream *fe_substream; 1430 struct snd_pcm_substream *be_substream; 1431 struct snd_soc_dpcm *dpcm; 1432 1433 snd_soc_dpcm_mutex_assert_held(fe); 1434 1435 /* only add new dpcms */ 1436 for_each_dpcm_be(fe, stream, dpcm) 1437 if (dpcm->be == be) 1438 return 0; 1439 1440 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1441 be_substream = snd_soc_dpcm_get_substream(be, stream); 1442 1443 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) 1444 return snd_soc_ret(be->dev, -EINVAL, 1445 "%s: %s is atomic but %s is nonatomic, invalid configuration\n", 1446 __func__, fe->dai_link->name, be->dai_link->name); 1447 1448 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1449 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1450 be_substream->pcm->nonatomic = 1; 1451 } 1452 1453 dpcm = kzalloc_obj(struct snd_soc_dpcm); 1454 if (!dpcm) 1455 return -ENOMEM; 1456 1457 dpcm->be = be; 1458 dpcm->fe = fe; 1459 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1460 snd_pcm_stream_lock_irq(fe_substream); 1461 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1462 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1463 snd_pcm_stream_unlock_irq(fe_substream); 1464 1465 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1466 snd_pcm_direction_name(stream), fe->dai_link->name, 1467 stream ? "<-" : "->", be->dai_link->name); 1468 1469 dpcm_create_debugfs_state(dpcm, stream); 1470 1471 return 1; 1472 } 1473 1474 /* reparent a BE onto another FE */ 1475 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1476 struct snd_soc_pcm_runtime *be, int stream) 1477 { 1478 struct snd_soc_dpcm *dpcm; 1479 struct snd_pcm_substream *fe_substream, *be_substream; 1480 1481 /* reparent if BE is connected to other FEs */ 1482 if (!be->dpcm[stream].users) 1483 return; 1484 1485 be_substream = snd_soc_dpcm_get_substream(be, stream); 1486 if (!be_substream) 1487 return; 1488 1489 for_each_dpcm_fe(be, stream, dpcm) { 1490 if (dpcm->fe == fe) 1491 continue; 1492 1493 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1494 snd_pcm_direction_name(stream), 1495 dpcm->fe->dai_link->name, 1496 stream ? "<-" : "->", dpcm->be->dai_link->name); 1497 1498 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1499 be_substream->runtime = fe_substream->runtime; 1500 break; 1501 } 1502 } 1503 1504 /* disconnect a BE and FE */ 1505 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1506 { 1507 struct snd_soc_dpcm *dpcm, *d; 1508 struct snd_pcm_substream *substream = snd_soc_dpcm_get_substream(fe, stream); 1509 LIST_HEAD(deleted_dpcms); 1510 1511 snd_soc_dpcm_mutex_assert_held(fe); 1512 1513 snd_pcm_stream_lock_irq(substream); 1514 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1515 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1516 snd_pcm_direction_name(stream), 1517 dpcm->be->dai_link->name); 1518 1519 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1520 continue; 1521 1522 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1523 snd_pcm_direction_name(stream), fe->dai_link->name, 1524 stream ? "<-" : "->", dpcm->be->dai_link->name); 1525 1526 /* BEs still alive need new FE */ 1527 dpcm_be_reparent(fe, dpcm->be, stream); 1528 1529 list_del(&dpcm->list_be); 1530 list_move(&dpcm->list_fe, &deleted_dpcms); 1531 } 1532 snd_pcm_stream_unlock_irq(substream); 1533 1534 while (!list_empty(&deleted_dpcms)) { 1535 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1536 list_fe); 1537 list_del(&dpcm->list_fe); 1538 dpcm_remove_debugfs_state(dpcm); 1539 kfree(dpcm); 1540 } 1541 } 1542 1543 /* get BE for DAI widget and stream */ 1544 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1545 struct snd_soc_dapm_widget *widget, int stream) 1546 { 1547 struct snd_soc_pcm_runtime *be; 1548 struct snd_soc_dapm_widget *w; 1549 struct snd_soc_dai *dai; 1550 int i; 1551 1552 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1553 1554 for_each_card_rtds(card, be) { 1555 1556 if (!be->dai_link->no_pcm) 1557 continue; 1558 1559 if (!snd_soc_dpcm_get_substream(be, stream)) 1560 continue; 1561 1562 for_each_rtd_dais(be, i, dai) { 1563 w = snd_soc_dai_get_widget(dai, stream); 1564 1565 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1566 w ? w->name : "(not set)"); 1567 1568 if (w == widget) 1569 return be; 1570 } 1571 } 1572 1573 /* Widget provided is not a BE */ 1574 return NULL; 1575 } 1576 1577 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1578 struct snd_soc_dapm_widget *widget) 1579 { 1580 struct snd_soc_dapm_widget *w; 1581 int i; 1582 1583 for_each_dapm_widgets(list, i, w) 1584 if (widget == w) 1585 return 1; 1586 1587 return 0; 1588 } 1589 EXPORT_SYMBOL_GPL(widget_in_list); 1590 1591 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1592 { 1593 struct snd_soc_card *card = snd_soc_dapm_to_card(widget->dapm); 1594 struct snd_soc_pcm_runtime *rtd; 1595 int stream; 1596 1597 /* adjust dir to stream */ 1598 if (dir == SND_SOC_DAPM_DIR_OUT) 1599 stream = SNDRV_PCM_STREAM_PLAYBACK; 1600 else 1601 stream = SNDRV_PCM_STREAM_CAPTURE; 1602 1603 rtd = dpcm_get_be(card, widget, stream); 1604 if (rtd) 1605 return true; 1606 1607 return false; 1608 } 1609 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1610 1611 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1612 int stream, struct snd_soc_dapm_widget_list **list) 1613 { 1614 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); 1615 int paths; 1616 1617 if (fe->dai_link->num_cpus > 1) 1618 return snd_soc_ret(fe->dev, -EINVAL, 1619 "%s doesn't support Multi CPU yet\n", __func__); 1620 1621 /* get number of valid DAI paths and their widgets */ 1622 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1623 fe->card->component_chaining ? 1624 NULL : dpcm_end_walk_at_be); 1625 1626 if (paths > 0) 1627 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1628 snd_pcm_direction_name(stream)); 1629 else if (paths == 0) 1630 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1631 snd_pcm_direction_name(stream)); 1632 1633 return paths; 1634 } 1635 1636 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1637 { 1638 snd_soc_dapm_dai_free_widgets(list); 1639 } 1640 1641 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1642 struct snd_soc_dapm_widget_list *list) 1643 { 1644 struct snd_soc_dai *dai; 1645 unsigned int i; 1646 1647 /* is there a valid DAI widget for this BE */ 1648 for_each_rtd_dais(dpcm->be, i, dai) { 1649 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1650 1651 /* 1652 * The BE is pruned only if none of the dai 1653 * widgets are in the active list. 1654 */ 1655 if (widget && widget_in_list(list, widget)) 1656 return true; 1657 } 1658 1659 return false; 1660 } 1661 1662 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1663 struct snd_soc_dapm_widget_list **list_) 1664 { 1665 struct snd_soc_dpcm *dpcm; 1666 int prune = 0; 1667 1668 /* Destroy any old FE <--> BE connections */ 1669 for_each_dpcm_be(fe, stream, dpcm) { 1670 if (dpcm_be_is_active(dpcm, stream, *list_)) 1671 continue; 1672 1673 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1674 snd_pcm_direction_name(stream), 1675 dpcm->be->dai_link->name, fe->dai_link->name); 1676 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1677 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1678 prune++; 1679 } 1680 1681 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1682 return prune; 1683 } 1684 1685 int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1686 struct snd_soc_dapm_widget_list **list_) 1687 { 1688 struct snd_soc_card *card = fe->card; 1689 struct snd_soc_dapm_widget_list *list = *list_; 1690 struct snd_soc_pcm_runtime *be; 1691 struct snd_soc_dapm_widget *widget; 1692 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1693 int i, new = 0, err; 1694 1695 /* don't connect if FE is not running */ 1696 if (!fe_substream->runtime && !fe->fe_compr) 1697 return new; 1698 1699 /* Create any new FE <--> BE connections */ 1700 for_each_dapm_widgets(list, i, widget) { 1701 1702 switch (widget->id) { 1703 case snd_soc_dapm_dai_in: 1704 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1705 continue; 1706 break; 1707 case snd_soc_dapm_dai_out: 1708 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1709 continue; 1710 break; 1711 default: 1712 continue; 1713 } 1714 1715 /* is there a valid BE rtd for this widget */ 1716 be = dpcm_get_be(card, widget, stream); 1717 if (!be) { 1718 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1719 widget->name); 1720 continue; 1721 } 1722 1723 /* 1724 * Filter for systems with 'component_chaining' enabled. 1725 * This helps to avoid unnecessary re-configuration of an 1726 * already active BE on such systems and ensures the BE DAI 1727 * widget is powered ON after hw_params() BE DAI callback. 1728 */ 1729 if (fe->card->component_chaining && 1730 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1731 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1732 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1733 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1734 continue; 1735 1736 /* newly connected FE and BE */ 1737 err = dpcm_be_connect(fe, be, stream); 1738 if (err < 0) { 1739 dev_err(fe->dev, "ASoC: can't connect %s\n", 1740 widget->name); 1741 break; 1742 } else if (err == 0) /* already connected */ 1743 continue; 1744 1745 /* new */ 1746 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1747 new++; 1748 } 1749 1750 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1751 return new; 1752 } 1753 1754 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1755 { 1756 struct snd_soc_dpcm *dpcm; 1757 1758 for_each_dpcm_be(fe, stream, dpcm) 1759 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1760 } 1761 1762 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1763 int do_hw_free, struct snd_soc_dpcm *last) 1764 { 1765 struct snd_soc_dpcm *dpcm; 1766 1767 /* disable any enabled and non active backends */ 1768 for_each_dpcm_be(fe, stream, dpcm) { 1769 struct snd_soc_pcm_runtime *be = dpcm->be; 1770 struct snd_pcm_substream *be_substream = 1771 snd_soc_dpcm_get_substream(be, stream); 1772 1773 if (dpcm == last) 1774 return; 1775 1776 /* is this op for this BE ? */ 1777 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1778 continue; 1779 1780 if (be->dpcm[stream].users == 0) { 1781 dev_err(be->dev, "ASoC: no users %s at close - state %s\n", 1782 snd_pcm_direction_name(stream), 1783 dpcm_state_string(be->dpcm[stream].state)); 1784 continue; 1785 } 1786 1787 if (--be->dpcm[stream].users != 0) 1788 continue; 1789 1790 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1791 if (!do_hw_free) 1792 continue; 1793 1794 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1795 __soc_pcm_hw_free(be, be_substream); 1796 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1797 } 1798 } 1799 1800 __soc_pcm_close(be, be_substream); 1801 be_substream->runtime = NULL; 1802 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1803 } 1804 } 1805 1806 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1807 { 1808 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1809 struct snd_soc_pcm_runtime *be; 1810 struct snd_soc_dpcm *dpcm; 1811 int err, count = 0; 1812 1813 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1814 for_each_dpcm_be(fe, stream, dpcm) { 1815 struct snd_pcm_substream *be_substream; 1816 1817 be = dpcm->be; 1818 be_substream = snd_soc_dpcm_get_substream(be, stream); 1819 1820 if (!be_substream) { 1821 dev_err(be->dev, "ASoC: no backend %s stream\n", 1822 snd_pcm_direction_name(stream)); 1823 continue; 1824 } 1825 1826 /* is this op for this BE ? */ 1827 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1828 continue; 1829 1830 /* first time the dpcm is open ? */ 1831 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1832 dev_err(be->dev, "ASoC: too many users %s at open %s\n", 1833 snd_pcm_direction_name(stream), 1834 dpcm_state_string(be->dpcm[stream].state)); 1835 continue; 1836 } 1837 1838 if (be->dpcm[stream].users++ != 0) 1839 continue; 1840 1841 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1842 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1843 continue; 1844 1845 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1846 snd_pcm_direction_name(stream), be->dai_link->name); 1847 1848 be_substream->runtime = fe_substream->runtime; 1849 err = __soc_pcm_open(be, be_substream); 1850 if (err < 0) { 1851 be->dpcm[stream].users--; 1852 if (be->dpcm[stream].users < 0) 1853 dev_err(be->dev, "ASoC: no users %s at unwind %s\n", 1854 snd_pcm_direction_name(stream), 1855 dpcm_state_string(be->dpcm[stream].state)); 1856 1857 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1858 goto unwind; 1859 } 1860 be->dpcm[stream].be_start = 0; 1861 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1862 count++; 1863 } 1864 1865 return count; 1866 1867 unwind: 1868 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1869 1870 return soc_pcm_ret(fe, err); 1871 } 1872 1873 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1874 { 1875 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1876 struct snd_pcm_runtime *runtime = substream->runtime; 1877 struct snd_pcm_hardware *hw = &runtime->hw; 1878 struct snd_soc_dai *dai; 1879 int stream = substream->stream; 1880 int i; 1881 1882 soc_pcm_hw_init(hw, false); 1883 1884 for_each_rtd_cpu_dais(fe, i, dai) { 1885 const struct snd_soc_pcm_stream *cpu_stream; 1886 1887 /* 1888 * Skip CPUs which don't support the current stream 1889 * type. See soc_pcm_init_runtime_hw() for more details 1890 */ 1891 if (!snd_soc_dai_stream_valid(dai, stream)) 1892 continue; 1893 1894 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1895 1896 soc_pcm_hw_update_rate(hw, cpu_stream); 1897 soc_pcm_hw_update_chan(hw, cpu_stream); 1898 soc_pcm_hw_update_format(hw, cpu_stream); 1899 } 1900 1901 } 1902 1903 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1904 { 1905 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1906 struct snd_pcm_runtime *runtime = substream->runtime; 1907 struct snd_pcm_hardware *hw = &runtime->hw; 1908 struct snd_soc_dpcm *dpcm; 1909 struct snd_soc_dai *dai; 1910 int stream = substream->stream; 1911 1912 if (!fe->dai_link->dpcm_merged_format) 1913 return; 1914 1915 /* 1916 * It returns merged BE codec format 1917 * if FE want to use it (= dpcm_merged_format) 1918 */ 1919 1920 for_each_dpcm_be(fe, stream, dpcm) { 1921 struct snd_soc_pcm_runtime *be = dpcm->be; 1922 const struct snd_soc_pcm_stream *codec_stream; 1923 int i; 1924 1925 for_each_rtd_codec_dais(be, i, dai) { 1926 /* 1927 * Skip CODECs which don't support the current stream 1928 * type. See soc_pcm_init_runtime_hw() for more details 1929 */ 1930 if (!snd_soc_dai_stream_valid(dai, stream)) 1931 continue; 1932 1933 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1934 1935 soc_pcm_hw_update_format(hw, codec_stream); 1936 } 1937 } 1938 } 1939 1940 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1941 { 1942 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1943 struct snd_pcm_runtime *runtime = substream->runtime; 1944 struct snd_pcm_hardware *hw = &runtime->hw; 1945 struct snd_soc_dpcm *dpcm; 1946 int stream = substream->stream; 1947 1948 if (!fe->dai_link->dpcm_merged_chan) 1949 return; 1950 1951 /* 1952 * It returns merged BE codec channel; 1953 * if FE want to use it (= dpcm_merged_chan) 1954 */ 1955 1956 for_each_dpcm_be(fe, stream, dpcm) { 1957 struct snd_soc_pcm_runtime *be = dpcm->be; 1958 const struct snd_soc_pcm_stream *cpu_stream; 1959 struct snd_soc_dai *dai; 1960 int i; 1961 1962 for_each_rtd_cpu_dais(be, i, dai) { 1963 /* 1964 * Skip CPUs which don't support the current stream 1965 * type. See soc_pcm_init_runtime_hw() for more details 1966 */ 1967 if (!snd_soc_dai_stream_valid(dai, stream)) 1968 continue; 1969 1970 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1971 1972 soc_pcm_hw_update_chan(hw, cpu_stream); 1973 } 1974 1975 /* 1976 * chan min/max cannot be enforced if there are multiple CODEC 1977 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1978 */ 1979 if (be->dai_link->num_codecs == 1) { 1980 const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1981 snd_soc_rtd_to_codec(be, 0), stream); 1982 1983 soc_pcm_hw_update_chan(hw, codec_stream); 1984 } 1985 } 1986 } 1987 1988 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1989 { 1990 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1991 struct snd_pcm_runtime *runtime = substream->runtime; 1992 struct snd_pcm_hardware *hw = &runtime->hw; 1993 struct snd_soc_dpcm *dpcm; 1994 int stream = substream->stream; 1995 1996 if (!fe->dai_link->dpcm_merged_rate) 1997 return; 1998 1999 /* 2000 * It returns merged BE codec channel; 2001 * if FE want to use it (= dpcm_merged_chan) 2002 */ 2003 2004 for_each_dpcm_be(fe, stream, dpcm) { 2005 struct snd_soc_pcm_runtime *be = dpcm->be; 2006 const struct snd_soc_pcm_stream *pcm; 2007 struct snd_soc_dai *dai; 2008 int i; 2009 2010 for_each_rtd_dais(be, i, dai) { 2011 /* 2012 * Skip DAIs which don't support the current stream 2013 * type. See soc_pcm_init_runtime_hw() for more details 2014 */ 2015 if (!snd_soc_dai_stream_valid(dai, stream)) 2016 continue; 2017 2018 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 2019 2020 soc_pcm_hw_update_rate(hw, pcm); 2021 } 2022 } 2023 } 2024 2025 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 2026 int stream) 2027 { 2028 struct snd_soc_dpcm *dpcm; 2029 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2030 struct snd_soc_dai *fe_cpu_dai; 2031 int err = 0; 2032 int i; 2033 2034 /* apply symmetry for FE */ 2035 soc_pcm_update_symmetry(fe_substream); 2036 2037 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 2038 /* Symmetry only applies if we've got an active stream. */ 2039 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 2040 if (err < 0) 2041 goto error; 2042 } 2043 2044 /* apply symmetry for BE */ 2045 for_each_dpcm_be(fe, stream, dpcm) { 2046 struct snd_soc_pcm_runtime *be = dpcm->be; 2047 struct snd_pcm_substream *be_substream = 2048 snd_soc_dpcm_get_substream(be, stream); 2049 struct snd_soc_pcm_runtime *rtd; 2050 struct snd_soc_dai *dai; 2051 2052 /* A backend may not have the requested substream */ 2053 if (!be_substream) 2054 continue; 2055 2056 rtd = snd_soc_substream_to_rtd(be_substream); 2057 if (rtd->dai_link->be_hw_params_fixup) 2058 continue; 2059 2060 soc_pcm_update_symmetry(be_substream); 2061 2062 /* Symmetry only applies if we've got an active stream. */ 2063 for_each_rtd_dais(rtd, i, dai) { 2064 err = soc_pcm_apply_symmetry(fe_substream, dai); 2065 if (err < 0) 2066 goto error; 2067 } 2068 } 2069 error: 2070 return soc_pcm_ret(fe, err); 2071 } 2072 2073 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 2074 { 2075 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2076 int stream = fe_substream->stream, ret = 0; 2077 2078 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2079 2080 ret = dpcm_be_dai_startup(fe, stream); 2081 if (ret < 0) 2082 goto be_err; 2083 2084 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 2085 2086 /* start the DAI frontend */ 2087 ret = __soc_pcm_open(fe, fe_substream); 2088 if (ret < 0) 2089 goto unwind; 2090 2091 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 2092 2093 dpcm_runtime_setup_fe(fe_substream); 2094 2095 dpcm_runtime_setup_be_format(fe_substream); 2096 dpcm_runtime_setup_be_chan(fe_substream); 2097 dpcm_runtime_setup_be_rate(fe_substream); 2098 2099 ret = dpcm_apply_symmetry(fe_substream, stream); 2100 2101 unwind: 2102 if (ret < 0) 2103 dpcm_be_dai_startup_unwind(fe, stream); 2104 be_err: 2105 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2106 2107 return soc_pcm_ret(fe, ret); 2108 } 2109 2110 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 2111 { 2112 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2113 int stream = substream->stream; 2114 2115 snd_soc_dpcm_mutex_assert_held(fe); 2116 2117 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2118 2119 /* shutdown the BEs */ 2120 dpcm_be_dai_shutdown(fe, stream); 2121 2122 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 2123 2124 /* now shutdown the frontend */ 2125 __soc_pcm_close(fe, substream); 2126 2127 /* run the stream stop event */ 2128 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 2129 2130 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 2131 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2132 return 0; 2133 } 2134 2135 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2136 { 2137 struct snd_soc_dpcm *dpcm; 2138 2139 /* only hw_params backends that are either sinks or sources 2140 * to this frontend DAI */ 2141 for_each_dpcm_be(fe, stream, dpcm) { 2142 2143 struct snd_soc_pcm_runtime *be = dpcm->be; 2144 struct snd_pcm_substream *be_substream = 2145 snd_soc_dpcm_get_substream(be, stream); 2146 2147 /* is this op for this BE ? */ 2148 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2149 continue; 2150 2151 /* only free hw when no longer used - check all FEs */ 2152 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2153 continue; 2154 2155 /* do not free hw if this BE is used by other FE */ 2156 if (be->dpcm[stream].users > 1) 2157 continue; 2158 2159 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2160 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2161 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2162 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2163 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2164 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2165 continue; 2166 2167 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2168 be->dai_link->name); 2169 2170 __soc_pcm_hw_free(be, be_substream); 2171 2172 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2173 } 2174 } 2175 2176 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2177 { 2178 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2179 int stream = substream->stream; 2180 2181 snd_soc_dpcm_mutex_lock(fe); 2182 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2183 2184 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2185 2186 /* call hw_free on the frontend */ 2187 soc_pcm_hw_clean(fe, substream, 0); 2188 2189 /* only hw_params backends that are either sinks or sources 2190 * to this frontend DAI */ 2191 dpcm_be_dai_hw_free(fe, stream); 2192 2193 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2194 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2195 2196 snd_soc_dpcm_mutex_unlock(fe); 2197 return 0; 2198 } 2199 2200 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2201 { 2202 struct snd_soc_pcm_runtime *be; 2203 struct snd_pcm_substream *be_substream; 2204 struct snd_soc_dpcm *dpcm; 2205 int ret; 2206 2207 for_each_dpcm_be(fe, stream, dpcm) { 2208 struct snd_pcm_hw_params hw_params; 2209 2210 be = dpcm->be; 2211 be_substream = snd_soc_dpcm_get_substream(be, stream); 2212 2213 /* is this op for this BE ? */ 2214 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2215 continue; 2216 2217 /* copy params for each dpcm */ 2218 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2219 sizeof(struct snd_pcm_hw_params)); 2220 2221 /* perform any hw_params fixups */ 2222 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2223 if (ret < 0) 2224 goto unwind; 2225 2226 /* copy the fixed-up hw params for BE dai */ 2227 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2228 sizeof(struct snd_pcm_hw_params)); 2229 2230 /* only allow hw_params() if no connected FEs are running */ 2231 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2232 continue; 2233 2234 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2235 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2236 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2237 continue; 2238 2239 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2240 be->dai_link->name); 2241 2242 ret = __soc_pcm_hw_params(be_substream, &hw_params); 2243 if (ret < 0) 2244 goto unwind; 2245 2246 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2247 } 2248 return 0; 2249 2250 unwind: 2251 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2252 __func__, be->dai_link->name, ret); 2253 2254 /* disable any enabled and non active backends */ 2255 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2256 be = dpcm->be; 2257 be_substream = snd_soc_dpcm_get_substream(be, stream); 2258 2259 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2260 continue; 2261 2262 /* only allow hw_free() if no connected FEs are running */ 2263 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2264 continue; 2265 2266 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2267 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2268 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2269 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2270 continue; 2271 2272 __soc_pcm_hw_free(be, be_substream); 2273 } 2274 2275 return ret; 2276 } 2277 2278 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2279 struct snd_pcm_hw_params *params) 2280 { 2281 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2282 int ret, stream = substream->stream; 2283 2284 snd_soc_dpcm_mutex_lock(fe); 2285 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2286 2287 memcpy(&fe->dpcm[stream].hw_params, params, 2288 sizeof(struct snd_pcm_hw_params)); 2289 ret = dpcm_be_dai_hw_params(fe, stream); 2290 if (ret < 0) 2291 goto out; 2292 2293 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2294 fe->dai_link->name, params_rate(params), 2295 params_channels(params), params_format(params)); 2296 2297 /* call hw_params on the frontend */ 2298 ret = __soc_pcm_hw_params(substream, params); 2299 if (ret < 0) 2300 dpcm_be_dai_hw_free(fe, stream); 2301 else 2302 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2303 2304 out: 2305 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2306 snd_soc_dpcm_mutex_unlock(fe); 2307 2308 return soc_pcm_ret(fe, ret); 2309 } 2310 2311 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2312 int cmd) 2313 { 2314 struct snd_soc_pcm_runtime *be; 2315 bool pause_stop_transition; 2316 struct snd_soc_dpcm *dpcm; 2317 unsigned long flags; 2318 int ret = 0; 2319 2320 for_each_dpcm_be(fe, stream, dpcm) { 2321 struct snd_pcm_substream *be_substream; 2322 2323 be = dpcm->be; 2324 be_substream = snd_soc_dpcm_get_substream(be, stream); 2325 2326 snd_pcm_stream_lock_irqsave_nested(be_substream, flags); 2327 2328 /* is this op for this BE ? */ 2329 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2330 goto next; 2331 2332 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2333 be->dai_link->name, cmd); 2334 2335 switch (cmd) { 2336 case SNDRV_PCM_TRIGGER_START: 2337 if (!be->dpcm[stream].be_start && 2338 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2339 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2340 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2341 goto next; 2342 2343 be->dpcm[stream].be_start++; 2344 if (be->dpcm[stream].be_start != 1) 2345 goto next; 2346 2347 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2348 ret = soc_pcm_trigger(be_substream, 2349 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2350 else 2351 ret = soc_pcm_trigger(be_substream, 2352 SNDRV_PCM_TRIGGER_START); 2353 if (ret) { 2354 be->dpcm[stream].be_start--; 2355 goto next; 2356 } 2357 2358 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2359 break; 2360 case SNDRV_PCM_TRIGGER_RESUME: 2361 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2362 goto next; 2363 2364 be->dpcm[stream].be_start++; 2365 if (be->dpcm[stream].be_start != 1) 2366 goto next; 2367 2368 ret = soc_pcm_trigger(be_substream, cmd); 2369 if (ret) { 2370 be->dpcm[stream].be_start--; 2371 goto next; 2372 } 2373 2374 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2375 break; 2376 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2377 if (!be->dpcm[stream].be_start && 2378 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2379 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2380 goto next; 2381 2382 fe->dpcm[stream].fe_pause = false; 2383 be->dpcm[stream].be_pause--; 2384 2385 be->dpcm[stream].be_start++; 2386 if (be->dpcm[stream].be_start != 1) 2387 goto next; 2388 2389 ret = soc_pcm_trigger(be_substream, cmd); 2390 if (ret) { 2391 be->dpcm[stream].be_start--; 2392 goto next; 2393 } 2394 2395 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2396 break; 2397 case SNDRV_PCM_TRIGGER_STOP: 2398 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2399 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2400 goto next; 2401 2402 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2403 be->dpcm[stream].be_start--; 2404 2405 if (be->dpcm[stream].be_start != 0) 2406 goto next; 2407 2408 pause_stop_transition = false; 2409 if (fe->dpcm[stream].fe_pause) { 2410 pause_stop_transition = true; 2411 fe->dpcm[stream].fe_pause = false; 2412 be->dpcm[stream].be_pause--; 2413 } 2414 2415 if (be->dpcm[stream].be_pause != 0) 2416 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2417 else 2418 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2419 2420 if (ret) { 2421 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2422 be->dpcm[stream].be_start++; 2423 if (pause_stop_transition) { 2424 fe->dpcm[stream].fe_pause = true; 2425 be->dpcm[stream].be_pause++; 2426 } 2427 goto next; 2428 } 2429 2430 if (be->dpcm[stream].be_pause != 0) 2431 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2432 else 2433 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2434 2435 break; 2436 case SNDRV_PCM_TRIGGER_SUSPEND: 2437 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2438 goto next; 2439 2440 be->dpcm[stream].be_start--; 2441 if (be->dpcm[stream].be_start != 0) 2442 goto next; 2443 2444 ret = soc_pcm_trigger(be_substream, cmd); 2445 if (ret) { 2446 be->dpcm[stream].be_start++; 2447 goto next; 2448 } 2449 2450 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2451 break; 2452 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2453 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2454 goto next; 2455 2456 fe->dpcm[stream].fe_pause = true; 2457 be->dpcm[stream].be_pause++; 2458 2459 be->dpcm[stream].be_start--; 2460 if (be->dpcm[stream].be_start != 0) 2461 goto next; 2462 2463 ret = soc_pcm_trigger(be_substream, cmd); 2464 if (ret) { 2465 be->dpcm[stream].be_start++; 2466 goto next; 2467 } 2468 2469 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2470 break; 2471 } 2472 next: 2473 snd_pcm_stream_unlock_irqrestore(be_substream, flags); 2474 if (ret) 2475 break; 2476 } 2477 return soc_pcm_ret(fe, ret); 2478 } 2479 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2480 2481 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2482 int cmd, bool fe_first) 2483 { 2484 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2485 int ret; 2486 2487 /* call trigger on the frontend before the backend. */ 2488 if (fe_first) { 2489 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2490 fe->dai_link->name, cmd); 2491 2492 ret = soc_pcm_trigger(substream, cmd); 2493 if (ret < 0) 2494 goto end; 2495 2496 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2497 } 2498 /* call trigger on the frontend after the backend. */ 2499 else { 2500 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2501 if (ret < 0) 2502 goto end; 2503 2504 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2505 fe->dai_link->name, cmd); 2506 2507 ret = soc_pcm_trigger(substream, cmd); 2508 } 2509 end: 2510 return snd_soc_ret(fe->dev, ret, "trigger FE cmd: %d failed\n", cmd); 2511 } 2512 2513 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2514 { 2515 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2516 int stream = substream->stream; 2517 int ret = 0; 2518 int fe_first; 2519 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2520 2521 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2522 2523 switch (trigger) { 2524 case SND_SOC_DPCM_TRIGGER_PRE: 2525 fe_first = true; 2526 break; 2527 case SND_SOC_DPCM_TRIGGER_POST: 2528 fe_first = false; 2529 break; 2530 default: 2531 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2532 fe->dai_link->name); 2533 ret = -EINVAL; 2534 goto out; 2535 } 2536 2537 switch (cmd) { 2538 case SNDRV_PCM_TRIGGER_START: 2539 case SNDRV_PCM_TRIGGER_RESUME: 2540 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2541 case SNDRV_PCM_TRIGGER_DRAIN: 2542 ret = dpcm_dai_trigger_fe_be(substream, cmd, fe_first); 2543 break; 2544 case SNDRV_PCM_TRIGGER_STOP: 2545 case SNDRV_PCM_TRIGGER_SUSPEND: 2546 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2547 ret = dpcm_dai_trigger_fe_be(substream, cmd, !fe_first); 2548 break; 2549 default: 2550 ret = -EINVAL; 2551 break; 2552 } 2553 2554 if (ret < 0) 2555 goto out; 2556 2557 switch (cmd) { 2558 case SNDRV_PCM_TRIGGER_START: 2559 case SNDRV_PCM_TRIGGER_RESUME: 2560 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2561 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2562 break; 2563 case SNDRV_PCM_TRIGGER_STOP: 2564 case SNDRV_PCM_TRIGGER_SUSPEND: 2565 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2566 break; 2567 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2568 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2569 break; 2570 } 2571 2572 out: 2573 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2574 return ret; 2575 } 2576 2577 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2578 { 2579 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2580 int stream = substream->stream; 2581 2582 /* if FE's runtime_update is already set, we're in race; 2583 * process this trigger later at exit 2584 */ 2585 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2586 fe->dpcm[stream].trigger_pending = cmd + 1; 2587 return 0; /* delayed, assuming it's successful */ 2588 } 2589 2590 /* we're alone, let's trigger */ 2591 return dpcm_fe_dai_do_trigger(substream, cmd); 2592 } 2593 2594 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2595 { 2596 struct snd_soc_dpcm *dpcm; 2597 int ret = 0; 2598 2599 for_each_dpcm_be(fe, stream, dpcm) { 2600 2601 struct snd_soc_pcm_runtime *be = dpcm->be; 2602 struct snd_pcm_substream *be_substream = 2603 snd_soc_dpcm_get_substream(be, stream); 2604 2605 /* is this op for this BE ? */ 2606 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2607 continue; 2608 2609 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2610 continue; 2611 2612 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2613 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2615 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2616 continue; 2617 2618 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2619 be->dai_link->name); 2620 2621 ret = __soc_pcm_prepare(be, be_substream); 2622 if (ret < 0) 2623 break; 2624 2625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2626 } 2627 2628 /* 2629 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2630 * 2631 * We don't want to log an error since we do not want to give userspace a way to do a 2632 * denial-of-service attack on the syslog / diskspace. 2633 */ 2634 return ret; 2635 } 2636 2637 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2638 { 2639 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2640 int stream = substream->stream, ret = 0; 2641 2642 snd_soc_dpcm_mutex_lock(fe); 2643 2644 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2645 2646 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2647 2648 ret = dpcm_be_dai_prepare(fe, stream); 2649 if (ret < 0) 2650 goto out; 2651 2652 /* call prepare on the frontend */ 2653 ret = __soc_pcm_prepare(fe, substream); 2654 if (ret < 0) 2655 goto out; 2656 2657 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2658 2659 out: 2660 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2661 snd_soc_dpcm_mutex_unlock(fe); 2662 2663 /* 2664 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2665 * 2666 * We don't want to log an error since we do not want to give userspace a way to do a 2667 * denial-of-service attack on the syslog / diskspace. 2668 */ 2669 return ret; 2670 } 2671 2672 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2673 { 2674 int err; 2675 2676 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2677 snd_pcm_direction_name(stream), fe->dai_link->name); 2678 2679 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2680 2681 dpcm_be_dai_hw_free(fe, stream); 2682 2683 dpcm_be_dai_shutdown(fe, stream); 2684 2685 /* run the stream event for each BE */ 2686 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2687 2688 return soc_pcm_ret(fe, err); 2689 } 2690 2691 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2692 { 2693 struct snd_soc_dpcm *dpcm; 2694 int ret = 0; 2695 2696 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2697 snd_pcm_direction_name(stream), fe->dai_link->name); 2698 2699 /* Only start the BE if the FE is ready */ 2700 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2701 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2702 dev_err(fe->dev, "ASoC: FE %s is not ready %s\n", 2703 fe->dai_link->name, dpcm_state_string(fe->dpcm[stream].state)); 2704 ret = -EINVAL; 2705 goto disconnect; 2706 } 2707 2708 /* startup must always be called for new BEs */ 2709 ret = dpcm_be_dai_startup(fe, stream); 2710 if (ret < 0) 2711 goto disconnect; 2712 2713 /* keep going if FE state is > open */ 2714 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2715 return 0; 2716 2717 ret = dpcm_be_dai_hw_params(fe, stream); 2718 if (ret < 0) 2719 goto close; 2720 2721 /* keep going if FE state is > hw_params */ 2722 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2723 return 0; 2724 2725 ret = dpcm_be_dai_prepare(fe, stream); 2726 if (ret < 0) 2727 goto hw_free; 2728 2729 /* run the stream event for each BE */ 2730 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2731 2732 /* keep going if FE state is > prepare */ 2733 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2734 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2735 return 0; 2736 2737 ret = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_START); 2738 if (ret < 0) 2739 goto hw_free; 2740 2741 return 0; 2742 2743 hw_free: 2744 dpcm_be_dai_hw_free(fe, stream); 2745 close: 2746 dpcm_be_dai_shutdown(fe, stream); 2747 disconnect: 2748 /* disconnect any pending BEs */ 2749 for_each_dpcm_be(fe, stream, dpcm) { 2750 struct snd_soc_pcm_runtime *be = dpcm->be; 2751 2752 /* is this op for this BE ? */ 2753 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2754 continue; 2755 2756 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2757 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2758 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2759 } 2760 2761 return soc_pcm_ret(fe, ret); 2762 } 2763 2764 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2765 { 2766 struct snd_soc_dapm_widget_list *list; 2767 int stream; 2768 int count, paths; 2769 2770 if (!fe->dai_link->dynamic) 2771 return 0; 2772 2773 if (fe->dai_link->num_cpus > 1) 2774 return snd_soc_ret(fe->dev, -EINVAL, 2775 "%s doesn't support Multi CPU yet\n", __func__); 2776 2777 /* only check active links */ 2778 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) 2779 return 0; 2780 2781 /* DAPM sync will call this to update DSP paths */ 2782 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2783 new ? "new" : "old", fe->dai_link->name); 2784 2785 for_each_pcm_streams(stream) { 2786 2787 /* skip if FE doesn't have playback/capture capability */ 2788 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || 2789 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) 2790 continue; 2791 2792 /* skip if FE isn't currently playing/capturing */ 2793 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || 2794 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) 2795 continue; 2796 2797 paths = dpcm_path_get(fe, stream, &list); 2798 if (paths < 0) 2799 return paths; 2800 2801 /* update any playback/capture paths */ 2802 /* 2803 * Find the corresponding BE DAIs that source or sink audio to this 2804 * FE substream. 2805 */ 2806 if (new) 2807 count = dpcm_add_paths(fe, stream, &list); 2808 else 2809 count = dpcm_prune_paths(fe, stream, &list); 2810 if (count) { 2811 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2812 if (new) 2813 dpcm_run_update_startup(fe, stream); 2814 else 2815 dpcm_run_update_shutdown(fe, stream); 2816 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2817 2818 dpcm_clear_pending_state(fe, stream); 2819 dpcm_be_disconnect(fe, stream); 2820 } 2821 2822 dpcm_path_put(&list); 2823 } 2824 2825 return 0; 2826 } 2827 2828 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2829 * any DAI links. 2830 */ 2831 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2832 { 2833 struct snd_soc_pcm_runtime *fe; 2834 int ret = 0; 2835 2836 snd_soc_dpcm_mutex_lock(card); 2837 /* shutdown all old paths first */ 2838 for_each_card_rtds(card, fe) { 2839 ret = soc_dpcm_fe_runtime_update(fe, 0); 2840 if (ret) 2841 goto out; 2842 } 2843 2844 /* bring new paths up */ 2845 for_each_card_rtds(card, fe) { 2846 ret = soc_dpcm_fe_runtime_update(fe, 1); 2847 if (ret) 2848 goto out; 2849 } 2850 2851 out: 2852 snd_soc_dpcm_mutex_unlock(card); 2853 2854 return snd_soc_ret(card->dev, ret, "%s() failed\n", __func__); 2855 } 2856 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2857 2858 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2859 { 2860 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2861 struct snd_soc_dpcm *dpcm; 2862 int stream = fe_substream->stream; 2863 2864 snd_soc_dpcm_mutex_assert_held(fe); 2865 2866 /* mark FE's links ready to prune */ 2867 for_each_dpcm_be(fe, stream, dpcm) 2868 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2869 2870 dpcm_be_disconnect(fe, stream); 2871 } 2872 2873 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2874 { 2875 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2876 int ret; 2877 2878 snd_soc_dpcm_mutex_lock(fe); 2879 ret = dpcm_fe_dai_shutdown(fe_substream); 2880 2881 dpcm_fe_dai_cleanup(fe_substream); 2882 2883 snd_soc_dpcm_mutex_unlock(fe); 2884 return ret; 2885 } 2886 2887 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2888 { 2889 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2890 struct snd_soc_dapm_widget_list *list; 2891 int ret; 2892 int stream = fe_substream->stream; 2893 2894 snd_soc_dpcm_mutex_lock(fe); 2895 2896 ret = dpcm_path_get(fe, stream, &list); 2897 if (ret < 0) 2898 goto open_end; 2899 2900 /* calculate valid and active FE <-> BE dpcms */ 2901 dpcm_add_paths(fe, stream, &list); 2902 2903 /* There is no point starting up this FE if there are no BEs. */ 2904 if (list_empty(&fe->dpcm[stream].be_clients)) { 2905 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles. */ 2906 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2907 fe->dai_link->name); 2908 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", fe->dai_link->name); 2909 2910 ret = -EINVAL; 2911 goto put_path; 2912 } 2913 2914 ret = dpcm_fe_dai_startup(fe_substream); 2915 if (ret < 0) 2916 dpcm_fe_dai_cleanup(fe_substream); 2917 2918 dpcm_clear_pending_state(fe, stream); 2919 put_path: 2920 dpcm_path_put(&list); 2921 open_end: 2922 snd_soc_dpcm_mutex_unlock(fe); 2923 return ret; 2924 } 2925 2926 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2927 int *playback, int *capture) 2928 { 2929 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2930 struct snd_soc_dai *cpu_dai; 2931 struct snd_soc_dai *codec_dai; 2932 struct snd_soc_dai_link_ch_map *ch_maps; 2933 struct snd_soc_dai *dummy_dai = snd_soc_find_dai(&snd_soc_dummy_dlc); 2934 int cpu_capture; 2935 int cpu_playback; 2936 int has_playback = 0; 2937 int has_capture = 0; 2938 int i; 2939 2940 if (dai_link->dynamic && dai_link->num_cpus > 1) 2941 return snd_soc_ret(rtd->dev, -EINVAL, 2942 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2943 2944 /* Adapt stream for codec2codec links */ 2945 cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2946 cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2947 2948 /* 2949 * see 2950 * soc.h :: [dai_link->ch_maps Image sample] 2951 */ 2952 for_each_rtd_ch_maps(rtd, i, ch_maps) { 2953 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); 2954 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec); 2955 2956 /* 2957 * FIXME 2958 * 2959 * DPCM Codec has been no checked before. 2960 * It should be checked, but it breaks compatibility. 2961 * 2962 * For example there is a case that CPU have loopback capabilities which is used 2963 * for tests on boards where the Codec has no capture capabilities. In this case, 2964 * Codec capture validation check will be fail, but system should allow capture 2965 * capabilities. We have no solution for it today. 2966 */ 2967 if (dai_link->dynamic || dai_link->no_pcm) 2968 codec_dai = dummy_dai; 2969 2970 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2971 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2972 has_playback = 1; 2973 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2974 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2975 has_capture = 1; 2976 } 2977 2978 if (dai_link->playback_only) 2979 has_capture = 0; 2980 2981 if (dai_link->capture_only) 2982 has_playback = 0; 2983 2984 if (!has_playback && !has_capture) 2985 return snd_soc_ret(rtd->dev, -EINVAL, 2986 "substream %s has no playback, no capture\n", dai_link->stream_name); 2987 2988 *playback = has_playback; 2989 *capture = has_capture; 2990 2991 return 0; 2992 } 2993 2994 static int soc_create_pcm(struct snd_pcm **pcm, 2995 struct snd_soc_pcm_runtime *rtd, 2996 int playback, int capture) 2997 { 2998 char new_name[64]; 2999 int ret; 3000 3001 /* create the PCM */ 3002 if (rtd->dai_link->c2c_params) { 3003 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 3004 rtd->dai_link->stream_name); 3005 3006 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 3007 playback, capture, pcm); 3008 } else if (rtd->dai_link->no_pcm) { 3009 snprintf(new_name, sizeof(new_name), "(%s)", 3010 rtd->dai_link->stream_name); 3011 3012 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 3013 playback, capture, pcm); 3014 } else { 3015 if (rtd->dai_link->dynamic) 3016 snprintf(new_name, sizeof(new_name), "%s (*)", 3017 rtd->dai_link->stream_name); 3018 else 3019 snprintf(new_name, sizeof(new_name), "%s %s-%d", 3020 rtd->dai_link->stream_name, 3021 soc_codec_dai_name(rtd), rtd->id); 3022 3023 ret = snd_pcm_new(rtd->card->snd_card, new_name, rtd->id, playback, 3024 capture, pcm); 3025 } 3026 if (ret < 0) 3027 return snd_soc_ret(rtd->dev, ret, 3028 "can't create pcm %s for dailink %s\n", new_name, rtd->dai_link->name); 3029 3030 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n", rtd->id, new_name); 3031 3032 return 0; 3033 } 3034 3035 /* create a new pcm */ 3036 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd) 3037 { 3038 struct snd_soc_component *component; 3039 struct snd_pcm *pcm; 3040 int ret = 0, playback = 0, capture = 0; 3041 int i; 3042 3043 ret = soc_get_playback_capture(rtd, &playback, &capture); 3044 if (ret < 0) 3045 return ret; 3046 3047 ret = soc_create_pcm(&pcm, rtd, playback, capture); 3048 if (ret < 0) 3049 return ret; 3050 3051 /* DAPM dai link stream work */ 3052 /* 3053 * Currently nothing to do for c2c links 3054 * Since c2c links are internal nodes in the DAPM graph and 3055 * don't interface with the outside world or application layer 3056 * we don't have to do any special handling on close. 3057 */ 3058 if (!rtd->dai_link->c2c_params) 3059 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 3060 3061 rtd->pcm = pcm; 3062 pcm->nonatomic = rtd->dai_link->nonatomic; 3063 pcm->private_data = rtd; 3064 pcm->no_device_suspend = true; 3065 3066 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 3067 if (playback) 3068 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 3069 if (capture) 3070 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 3071 goto out; 3072 } 3073 3074 /* ASoC PCM operations */ 3075 if (rtd->dai_link->dynamic) { 3076 rtd->ops.open = dpcm_fe_dai_open; 3077 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 3078 rtd->ops.prepare = dpcm_fe_dai_prepare; 3079 rtd->ops.trigger = dpcm_fe_dai_trigger; 3080 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 3081 rtd->ops.close = dpcm_fe_dai_close; 3082 rtd->ops.pointer = soc_pcm_pointer; 3083 } else { 3084 rtd->ops.open = soc_pcm_open; 3085 rtd->ops.hw_params = soc_pcm_hw_params; 3086 rtd->ops.prepare = soc_pcm_prepare; 3087 rtd->ops.trigger = soc_pcm_trigger; 3088 rtd->ops.hw_free = soc_pcm_hw_free; 3089 rtd->ops.close = soc_pcm_close; 3090 rtd->ops.pointer = soc_pcm_pointer; 3091 } 3092 3093 for_each_rtd_components(rtd, i, component) { 3094 const struct snd_soc_component_driver *drv = component->driver; 3095 3096 if (drv->ioctl) 3097 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 3098 if (drv->sync_stop) 3099 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 3100 if (drv->copy) 3101 rtd->ops.copy = snd_soc_pcm_component_copy; 3102 if (drv->page) 3103 rtd->ops.page = snd_soc_pcm_component_page; 3104 if (drv->mmap) 3105 rtd->ops.mmap = snd_soc_pcm_component_mmap; 3106 if (drv->ack) 3107 rtd->ops.ack = snd_soc_pcm_component_ack; 3108 } 3109 3110 if (playback) 3111 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 3112 3113 if (capture) 3114 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 3115 3116 ret = snd_soc_pcm_component_new(rtd); 3117 if (ret < 0) 3118 return ret; 3119 out: 3120 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 3121 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 3122 return ret; 3123 } 3124 3125 /* get the substream for this BE */ 3126 struct snd_pcm_substream * 3127 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 3128 { 3129 return be->pcm->streams[stream].substream; 3130 } 3131 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 3132