1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/slab.h> 18 #include <linux/workqueue.h> 19 #include <linux/export.h> 20 #include <linux/debugfs.h> 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 #include <sound/soc-dpcm.h> 26 #include <sound/soc-link.h> 27 #include <sound/initval.h> 28 29 #define soc_pcm_ret(rtd, ret) _soc_pcm_ret(rtd, __func__, ret) 30 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd, 31 const char *func, int ret) 32 { 33 return snd_soc_ret(rtd->dev, ret, 34 "at %s() on %s\n", func, rtd->dai_link->name); 35 } 36 37 /* is the current PCM operation for this FE ? */ 38 #if 0 39 static int snd_soc_dpcm_can_fe_update(struct snd_soc_pcm_runtime *fe, int stream) 40 { 41 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 42 return 1; 43 return 0; 44 } 45 #endif 46 47 /* is the current PCM operation for this BE ? */ 48 static int snd_soc_dpcm_can_be_update(struct snd_soc_pcm_runtime *fe, 49 struct snd_soc_pcm_runtime *be, int stream) 50 { 51 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 52 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 53 be->dpcm[stream].runtime_update)) 54 return 1; 55 return 0; 56 } 57 58 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 59 struct snd_soc_pcm_runtime *be, 60 int stream, 61 const enum snd_soc_dpcm_state *states, 62 int num_states) 63 { 64 struct snd_soc_dpcm *dpcm; 65 int state; 66 int ret = 1; 67 int i; 68 69 for_each_dpcm_fe(be, stream, dpcm) { 70 71 if (dpcm->fe == fe) 72 continue; 73 74 state = dpcm->fe->dpcm[stream].state; 75 for (i = 0; i < num_states; i++) { 76 if (state == states[i]) { 77 ret = 0; 78 break; 79 } 80 } 81 } 82 83 /* it's safe to do this BE DAI */ 84 return ret; 85 } 86 87 /* 88 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 89 * are not running, paused or suspended for the specified stream direction. 90 */ 91 static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 92 struct snd_soc_pcm_runtime *be, int stream) 93 { 94 const enum snd_soc_dpcm_state state[] = { 95 SND_SOC_DPCM_STATE_START, 96 SND_SOC_DPCM_STATE_PAUSED, 97 SND_SOC_DPCM_STATE_SUSPEND, 98 }; 99 100 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 101 } 102 103 /* 104 * We can only change hw params a BE DAI if any of it's FE are not prepared, 105 * running, paused or suspended for the specified stream direction. 106 */ 107 static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 108 struct snd_soc_pcm_runtime *be, int stream) 109 { 110 const enum snd_soc_dpcm_state state[] = { 111 SND_SOC_DPCM_STATE_START, 112 SND_SOC_DPCM_STATE_PAUSED, 113 SND_SOC_DPCM_STATE_SUSPEND, 114 SND_SOC_DPCM_STATE_PREPARE, 115 }; 116 117 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 118 } 119 120 /* 121 * We can only prepare a BE DAI if any of it's FE are not prepared, 122 * running or paused for the specified stream direction. 123 */ 124 static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe, 125 struct snd_soc_pcm_runtime *be, int stream) 126 { 127 const enum snd_soc_dpcm_state state[] = { 128 SND_SOC_DPCM_STATE_START, 129 SND_SOC_DPCM_STATE_PAUSED, 130 SND_SOC_DPCM_STATE_PREPARE, 131 }; 132 133 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 134 } 135 136 #define DPCM_MAX_BE_USERS 8 137 138 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 139 { 140 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 141 } 142 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 143 { 144 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec"; 145 } 146 147 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 148 { 149 switch (state) { 150 case SND_SOC_DPCM_STATE_NEW: 151 return "new"; 152 case SND_SOC_DPCM_STATE_OPEN: 153 return "open"; 154 case SND_SOC_DPCM_STATE_HW_PARAMS: 155 return "hw_params"; 156 case SND_SOC_DPCM_STATE_PREPARE: 157 return "prepare"; 158 case SND_SOC_DPCM_STATE_START: 159 return "start"; 160 case SND_SOC_DPCM_STATE_STOP: 161 return "stop"; 162 case SND_SOC_DPCM_STATE_SUSPEND: 163 return "suspend"; 164 case SND_SOC_DPCM_STATE_PAUSED: 165 return "paused"; 166 case SND_SOC_DPCM_STATE_HW_FREE: 167 return "hw_free"; 168 case SND_SOC_DPCM_STATE_CLOSE: 169 return "close"; 170 } 171 172 return "unknown"; 173 } 174 175 #ifdef CONFIG_DEBUG_FS 176 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 177 int stream, char *buf, size_t size) 178 { 179 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 180 struct snd_soc_dpcm *dpcm; 181 ssize_t offset = 0; 182 183 /* FE state */ 184 offset += scnprintf(buf + offset, size - offset, 185 "[%s - %s]\n", fe->dai_link->name, 186 stream ? "Capture" : "Playback"); 187 188 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 189 dpcm_state_string(fe->dpcm[stream].state)); 190 191 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 192 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 193 offset += scnprintf(buf + offset, size - offset, 194 "Hardware Params: " 195 "Format = %s, Channels = %d, Rate = %d\n", 196 snd_pcm_format_name(params_format(params)), 197 params_channels(params), 198 params_rate(params)); 199 200 /* BEs state */ 201 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 202 203 if (list_empty(&fe->dpcm[stream].be_clients)) { 204 offset += scnprintf(buf + offset, size - offset, 205 " No active DSP links\n"); 206 goto out; 207 } 208 209 for_each_dpcm_be(fe, stream, dpcm) { 210 struct snd_soc_pcm_runtime *be = dpcm->be; 211 params = &be->dpcm[stream].hw_params; 212 213 offset += scnprintf(buf + offset, size - offset, 214 "- %s\n", be->dai_link->name); 215 216 offset += scnprintf(buf + offset, size - offset, 217 " State: %s\n", 218 dpcm_state_string(be->dpcm[stream].state)); 219 220 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 221 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 222 offset += scnprintf(buf + offset, size - offset, 223 " Hardware Params: " 224 "Format = %s, Channels = %d, Rate = %d\n", 225 snd_pcm_format_name(params_format(params)), 226 params_channels(params), 227 params_rate(params)); 228 } 229 out: 230 return offset; 231 } 232 233 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 234 size_t count, loff_t *ppos) 235 { 236 struct snd_soc_pcm_runtime *fe = file->private_data; 237 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 238 int stream; 239 char *buf; 240 241 if (fe->dai_link->num_cpus > 1) 242 return snd_soc_ret(fe->dev, -EINVAL, 243 "%s doesn't support Multi CPU yet\n", __func__); 244 245 buf = kmalloc(out_count, GFP_KERNEL); 246 if (!buf) 247 return -ENOMEM; 248 249 snd_soc_dpcm_mutex_lock(fe); 250 for_each_pcm_streams(stream) 251 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream)) 252 offset += dpcm_show_state(fe, stream, 253 buf + offset, 254 out_count - offset); 255 snd_soc_dpcm_mutex_unlock(fe); 256 257 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 258 259 kfree(buf); 260 return ret; 261 } 262 263 static const struct file_operations dpcm_state_fops = { 264 .open = simple_open, 265 .read = dpcm_state_read_file, 266 .llseek = default_llseek, 267 }; 268 269 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 270 { 271 if (!rtd->dai_link->dynamic) 272 return; 273 274 if (!rtd->card->debugfs_card_root) 275 return; 276 277 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 278 rtd->card->debugfs_card_root); 279 280 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 281 rtd, &dpcm_state_fops); 282 } 283 284 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 285 { 286 char *name; 287 288 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 289 snd_pcm_direction_name(stream)); 290 if (name) { 291 dpcm->debugfs_state = debugfs_create_dir( 292 name, dpcm->fe->debugfs_dpcm_root); 293 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 294 &dpcm->state); 295 kfree(name); 296 } 297 } 298 299 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 300 { 301 debugfs_remove_recursive(dpcm->debugfs_state); 302 } 303 304 #else 305 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 306 int stream) 307 { 308 } 309 310 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 311 { 312 } 313 #endif 314 315 /* Set FE's runtime_update state; the state is protected via PCM stream lock 316 * for avoiding the race with trigger callback. 317 * If the state is unset and a trigger is pending while the previous operation, 318 * process the pending trigger action here. 319 */ 320 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 321 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 322 int stream, enum snd_soc_dpcm_update state) 323 { 324 struct snd_pcm_substream *substream = 325 snd_soc_dpcm_get_substream(fe, stream); 326 327 snd_pcm_stream_lock_irq(substream); 328 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 329 dpcm_fe_dai_do_trigger(substream, 330 fe->dpcm[stream].trigger_pending - 1); 331 fe->dpcm[stream].trigger_pending = 0; 332 } 333 fe->dpcm[stream].runtime_update = state; 334 snd_pcm_stream_unlock_irq(substream); 335 } 336 337 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 338 int stream, enum snd_soc_dpcm_update state) 339 { 340 be->dpcm[stream].runtime_update = state; 341 } 342 343 /** 344 * snd_soc_runtime_action() - Increment/Decrement active count for 345 * PCM runtime components 346 * @rtd: ASoC PCM runtime that is activated 347 * @stream: Direction of the PCM stream 348 * @action: Activate stream if 1. Deactivate if -1. 349 * 350 * Increments/Decrements the active count for all the DAIs and components 351 * attached to a PCM runtime. 352 * Should typically be called when a stream is opened. 353 * 354 * Must be called with the rtd->card->pcm_mutex being held 355 */ 356 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 357 int stream, int action) 358 { 359 struct snd_soc_component *component; 360 struct snd_soc_dai *dai; 361 int i; 362 363 snd_soc_dpcm_mutex_assert_held(rtd); 364 365 for_each_rtd_dais(rtd, i, dai) 366 snd_soc_dai_action(dai, stream, action); 367 368 /* Increments/Decrements the active count for components without DAIs */ 369 for_each_rtd_components(rtd, i, component) { 370 if (component->num_dai) 371 continue; 372 component->active += action; 373 } 374 } 375 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 376 377 /** 378 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 379 * @rtd: The ASoC PCM runtime that should be checked. 380 * 381 * This function checks whether the power down delay should be ignored for a 382 * specific PCM runtime. Returns true if the delay is 0, if the DAI link has 383 * been configured to ignore the delay, or if none of the components benefits 384 * from having the delay. 385 */ 386 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 387 { 388 struct snd_soc_component *component; 389 int i; 390 391 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 392 return true; 393 394 for_each_rtd_components(rtd, i, component) 395 if (component->driver->use_pmdown_time) 396 /* No need to go through all components */ 397 return false; 398 399 return true; 400 } 401 402 /* DPCM stream event, send event to FE and all active BEs. */ 403 void dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, int event) 404 { 405 struct snd_soc_dpcm *dpcm; 406 407 snd_soc_dpcm_mutex_assert_held(fe); 408 409 for_each_dpcm_be(fe, dir, dpcm) { 410 411 struct snd_soc_pcm_runtime *be = dpcm->be; 412 413 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 414 be->dai_link->name, event, dir); 415 416 if ((event == SND_SOC_DAPM_STREAM_STOP) && 417 (be->dpcm[dir].users >= 1)) 418 continue; 419 420 snd_soc_dapm_stream_event(be, dir, event); 421 } 422 423 snd_soc_dapm_stream_event(fe, dir, event); 424 } 425 426 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 427 struct snd_pcm_hw_params *params) 428 { 429 if (params) { 430 dai->symmetric_rate = params_rate(params); 431 dai->symmetric_channels = params_channels(params); 432 dai->symmetric_sample_bits = snd_pcm_format_physical_width(params_format(params)); 433 } else { 434 dai->symmetric_rate = 0; 435 dai->symmetric_channels = 0; 436 dai->symmetric_sample_bits = 0; 437 } 438 } 439 440 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 441 struct snd_soc_dai *soc_dai) 442 { 443 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 444 int ret; 445 446 if (!snd_soc_dai_active(soc_dai)) 447 return 0; 448 449 #define __soc_pcm_apply_symmetry(name, NAME) \ 450 if (soc_dai->symmetric_##name && \ 451 (soc_dai->driver->symmetric_##name || rtd->dai_link->symmetric_##name)) { \ 452 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 453 #name, soc_dai->symmetric_##name); \ 454 \ 455 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 456 SNDRV_PCM_HW_PARAM_##NAME,\ 457 soc_dai->symmetric_##name); \ 458 if (ret < 0) \ 459 return snd_soc_ret(soc_dai->dev, ret, \ 460 "Unable to apply %s constraint\n", #name); \ 461 } 462 463 __soc_pcm_apply_symmetry(rate, RATE); 464 __soc_pcm_apply_symmetry(channels, CHANNELS); 465 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 466 467 return 0; 468 } 469 470 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 471 struct snd_pcm_hw_params *params) 472 { 473 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 474 struct snd_soc_dai d; 475 struct snd_soc_dai *dai; 476 struct snd_soc_dai *cpu_dai; 477 unsigned int symmetry, i; 478 479 d.name = __func__; 480 soc_pcm_set_dai_params(&d, params); 481 482 #define __soc_pcm_params_symmetry(xxx) \ 483 symmetry = rtd->dai_link->symmetric_##xxx; \ 484 for_each_rtd_dais(rtd, i, dai) \ 485 symmetry |= dai->driver->symmetric_##xxx; \ 486 \ 487 if (symmetry) \ 488 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 489 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 490 cpu_dai->symmetric_##xxx && \ 491 cpu_dai->symmetric_##xxx != d.symmetric_##xxx) \ 492 return snd_soc_ret(rtd->dev, -EINVAL, \ 493 "unmatched %s symmetry: %s:%d - %s:%d\n", \ 494 #xxx, cpu_dai->name, cpu_dai->symmetric_##xxx, \ 495 d.name, d.symmetric_##xxx); 496 497 /* reject unmatched parameters when applying symmetry */ 498 __soc_pcm_params_symmetry(rate); 499 __soc_pcm_params_symmetry(channels); 500 __soc_pcm_params_symmetry(sample_bits); 501 502 return 0; 503 } 504 505 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 506 { 507 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 508 struct snd_soc_dai_link *link = rtd->dai_link; 509 struct snd_soc_dai *dai; 510 unsigned int symmetry, i; 511 512 symmetry = link->symmetric_rate || 513 link->symmetric_channels || 514 link->symmetric_sample_bits; 515 516 for_each_rtd_dais(rtd, i, dai) 517 symmetry = symmetry || 518 dai->driver->symmetric_rate || 519 dai->driver->symmetric_channels || 520 dai->driver->symmetric_sample_bits; 521 522 if (symmetry) 523 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 524 } 525 526 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 527 { 528 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 529 int ret; 530 531 if (!bits) 532 return; 533 534 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 535 if (ret != 0) 536 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 537 bits, ret); 538 } 539 540 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 541 { 542 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 543 struct snd_soc_dai *cpu_dai; 544 struct snd_soc_dai *codec_dai; 545 int stream = substream->stream; 546 int i; 547 unsigned int bits = 0, cpu_bits = 0; 548 549 for_each_rtd_codec_dais(rtd, i, codec_dai) { 550 const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 551 552 if (pcm_codec->sig_bits == 0) { 553 bits = 0; 554 break; 555 } 556 bits = max(pcm_codec->sig_bits, bits); 557 } 558 559 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 560 const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 561 562 if (pcm_cpu->sig_bits == 0) { 563 cpu_bits = 0; 564 break; 565 } 566 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 567 } 568 569 soc_pcm_set_msb(substream, bits); 570 soc_pcm_set_msb(substream, cpu_bits); 571 } 572 573 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 574 { 575 hw->rates = UINT_MAX; 576 hw->rate_min = 0; 577 hw->rate_max = UINT_MAX; 578 hw->channels_min = 0; 579 hw->channels_max = UINT_MAX; 580 hw->formats = ULLONG_MAX; 581 } 582 583 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 584 const struct snd_soc_pcm_stream *p) 585 { 586 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 587 588 /* setup hw->rate_min/max via hw->rates first */ 589 snd_pcm_hw_limit_rates(hw); 590 591 /* update hw->rate_min/max by snd_soc_pcm_stream */ 592 hw->rate_min = max(hw->rate_min, p->rate_min); 593 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 594 } 595 596 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 597 const struct snd_soc_pcm_stream *p) 598 { 599 hw->channels_min = max(hw->channels_min, p->channels_min); 600 hw->channels_max = min(hw->channels_max, p->channels_max); 601 } 602 603 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 604 const struct snd_soc_pcm_stream *p) 605 { 606 hw->formats &= p->formats; 607 hw->subformats &= p->subformats; 608 } 609 610 /** 611 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 612 * @rtd: ASoC PCM runtime 613 * @hw: PCM hardware parameters (output) 614 * @stream: Direction of the PCM stream 615 * 616 * Calculates the subset of stream parameters supported by all DAIs 617 * associated with the PCM stream. 618 */ 619 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 620 struct snd_pcm_hardware *hw, int stream) 621 { 622 struct snd_soc_dai *codec_dai; 623 struct snd_soc_dai *cpu_dai; 624 const struct snd_soc_pcm_stream *codec_stream; 625 const struct snd_soc_pcm_stream *cpu_stream; 626 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 627 int i; 628 629 soc_pcm_hw_init(hw); 630 631 /* first calculate min/max only for CPUs in the DAI link */ 632 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 633 634 /* 635 * Skip CPUs which don't support the current stream type. 636 * Otherwise, since the rate, channel, and format values will 637 * zero in that case, we would have no usable settings left, 638 * causing the resulting setup to fail. 639 */ 640 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 641 continue; 642 643 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 644 645 soc_pcm_hw_update_chan(hw, cpu_stream); 646 soc_pcm_hw_update_rate(hw, cpu_stream); 647 soc_pcm_hw_update_format(hw, cpu_stream); 648 } 649 cpu_chan_min = hw->channels_min; 650 cpu_chan_max = hw->channels_max; 651 652 /* second calculate min/max only for CODECs in the DAI link */ 653 for_each_rtd_codec_dais(rtd, i, codec_dai) { 654 655 /* 656 * Skip CODECs which don't support the current stream type. 657 * Otherwise, since the rate, channel, and format values will 658 * zero in that case, we would have no usable settings left, 659 * causing the resulting setup to fail. 660 */ 661 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 662 continue; 663 664 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 665 666 soc_pcm_hw_update_chan(hw, codec_stream); 667 soc_pcm_hw_update_rate(hw, codec_stream); 668 soc_pcm_hw_update_format(hw, codec_stream); 669 } 670 671 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 672 if (!hw->channels_min) 673 return -EINVAL; 674 675 /* 676 * chan min/max cannot be enforced if there are multiple CODEC DAIs 677 * connected to CPU DAI(s), use CPU DAI's directly and let 678 * channel allocation be fixed up later 679 */ 680 if (rtd->dai_link->num_codecs > 1) { 681 hw->channels_min = cpu_chan_min; 682 hw->channels_max = cpu_chan_max; 683 } 684 685 return 0; 686 } 687 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 688 689 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 690 { 691 struct snd_pcm_hardware *hw = &substream->runtime->hw; 692 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 693 u64 formats = hw->formats; 694 695 /* 696 * At least one CPU and one CODEC should match. Otherwise, we should 697 * have bailed out on a higher level, since there would be no CPU or 698 * CODEC to support the transfer direction in that case. 699 */ 700 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 701 702 if (formats) 703 hw->formats &= formats; 704 } 705 706 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 707 { 708 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 709 struct snd_soc_component *component; 710 int i, ret = 0; 711 712 for_each_rtd_components(rtd, i, component) { 713 ret = snd_soc_component_module_get_when_open(component, substream); 714 if (ret < 0) 715 break; 716 717 ret = snd_soc_component_open(component, substream); 718 if (ret < 0) 719 break; 720 } 721 722 return ret; 723 } 724 725 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 726 int rollback) 727 { 728 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 729 struct snd_soc_component *component; 730 int i, ret = 0; 731 732 for_each_rtd_components(rtd, i, component) { 733 int r = snd_soc_component_close(component, substream, rollback); 734 if (r < 0) 735 ret = r; /* use last ret */ 736 737 snd_soc_component_module_put_when_close(component, substream, rollback); 738 } 739 740 return ret; 741 } 742 743 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 744 struct snd_pcm_substream *substream, int rollback) 745 { 746 struct snd_soc_component *component; 747 struct snd_soc_dai *dai; 748 int i; 749 750 snd_soc_dpcm_mutex_assert_held(rtd); 751 752 if (!rollback) { 753 snd_soc_runtime_deactivate(rtd, substream->stream); 754 755 /* Make sure DAI parameters cleared if the DAI becomes inactive */ 756 for_each_rtd_dais(rtd, i, dai) { 757 if (snd_soc_dai_active(dai) == 0) 758 soc_pcm_set_dai_params(dai, NULL); 759 } 760 } 761 762 for_each_rtd_dais_reverse(rtd, i, dai) 763 snd_soc_dai_shutdown(dai, substream, rollback); 764 765 snd_soc_link_shutdown(substream, rollback); 766 767 soc_pcm_components_close(substream, rollback); 768 769 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 770 771 for_each_rtd_components(rtd, i, component) 772 if (!snd_soc_component_active(component)) 773 pinctrl_pm_select_sleep_state(component->dev); 774 775 return 0; 776 } 777 778 /* 779 * Called by ALSA when a PCM substream is closed. Private data can be 780 * freed here. The cpu DAI, codec DAI, machine and components are also 781 * shutdown. 782 */ 783 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 784 struct snd_pcm_substream *substream) 785 { 786 return soc_pcm_clean(rtd, substream, 0); 787 } 788 789 /* PCM close ops for non-DPCM streams */ 790 static int soc_pcm_close(struct snd_pcm_substream *substream) 791 { 792 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 793 794 snd_soc_dpcm_mutex_lock(rtd); 795 __soc_pcm_close(rtd, substream); 796 snd_soc_dpcm_mutex_unlock(rtd); 797 return 0; 798 } 799 800 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 801 { 802 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 803 struct snd_pcm_hardware *hw = &substream->runtime->hw; 804 const char *name_cpu = soc_cpu_dai_name(rtd); 805 const char *name_codec = soc_codec_dai_name(rtd); 806 const char *err_msg; 807 struct device *dev = rtd->dev; 808 809 err_msg = "rates"; 810 if (!hw->rates) 811 goto config_err; 812 813 err_msg = "formats"; 814 if (!hw->formats) 815 goto config_err; 816 817 err_msg = "channels"; 818 if (!hw->channels_min || !hw->channels_max || 819 hw->channels_min > hw->channels_max) 820 goto config_err; 821 822 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 823 name_cpu); 824 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 825 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 826 hw->channels_max); 827 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 828 hw->rate_max); 829 830 return 0; 831 832 config_err: 833 return snd_soc_ret(dev, -EINVAL, 834 "%s <-> %s No matching %s\n", name_codec, name_cpu, err_msg); 835 } 836 837 /* 838 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 839 * then initialized and any private data can be allocated. This also calls 840 * startup for the cpu DAI, component, machine and codec DAI. 841 */ 842 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 843 struct snd_pcm_substream *substream) 844 { 845 struct snd_soc_component *component; 846 struct snd_soc_dai *dai; 847 int i, ret = 0; 848 849 snd_soc_dpcm_mutex_assert_held(rtd); 850 851 for_each_rtd_components(rtd, i, component) 852 pinctrl_pm_select_default_state(component->dev); 853 854 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 855 if (ret < 0) 856 goto err; 857 858 ret = soc_pcm_components_open(substream); 859 if (ret < 0) 860 goto err; 861 862 ret = snd_soc_link_startup(substream); 863 if (ret < 0) 864 goto err; 865 866 /* startup the audio subsystem */ 867 for_each_rtd_dais(rtd, i, dai) { 868 ret = snd_soc_dai_startup(dai, substream); 869 if (ret < 0) 870 goto err; 871 } 872 873 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 874 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 875 goto dynamic; 876 877 /* Check that the codec and cpu DAIs are compatible */ 878 soc_pcm_init_runtime_hw(substream); 879 880 soc_pcm_update_symmetry(substream); 881 882 ret = soc_hw_sanity_check(substream); 883 if (ret < 0) 884 goto err; 885 886 soc_pcm_apply_msb(substream); 887 888 /* Symmetry only applies if we've already got an active stream. */ 889 for_each_rtd_dais(rtd, i, dai) { 890 ret = soc_pcm_apply_symmetry(substream, dai); 891 if (ret != 0) 892 goto err; 893 } 894 dynamic: 895 snd_soc_runtime_activate(rtd, substream->stream); 896 ret = 0; 897 err: 898 if (ret < 0) 899 soc_pcm_clean(rtd, substream, 1); 900 901 return soc_pcm_ret(rtd, ret); 902 } 903 904 /* PCM open ops for non-DPCM streams */ 905 static int soc_pcm_open(struct snd_pcm_substream *substream) 906 { 907 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 908 int ret; 909 910 snd_soc_dpcm_mutex_lock(rtd); 911 ret = __soc_pcm_open(rtd, substream); 912 snd_soc_dpcm_mutex_unlock(rtd); 913 return ret; 914 } 915 916 /* 917 * Called by ALSA when the PCM substream is prepared, can set format, sample 918 * rate, etc. This function is non atomic and can be called multiple times, 919 * it can refer to the runtime info. 920 */ 921 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 922 struct snd_pcm_substream *substream) 923 { 924 struct snd_soc_dai *dai; 925 int i, ret = 0; 926 927 snd_soc_dpcm_mutex_assert_held(rtd); 928 929 ret = snd_soc_link_prepare(substream); 930 if (ret < 0) 931 goto out; 932 933 ret = snd_soc_pcm_component_prepare(substream); 934 if (ret < 0) 935 goto out; 936 937 ret = snd_soc_pcm_dai_prepare(substream); 938 if (ret < 0) 939 goto out; 940 941 /* cancel any delayed stream shutdown that is pending */ 942 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 943 rtd->pop_wait) { 944 rtd->pop_wait = 0; 945 cancel_delayed_work(&rtd->delayed_work); 946 } 947 948 snd_soc_dapm_stream_event(rtd, substream->stream, 949 SND_SOC_DAPM_STREAM_START); 950 951 for_each_rtd_dais(rtd, i, dai) { 952 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 953 snd_soc_dai_digital_mute(dai, 0, substream->stream); 954 } 955 956 out: 957 /* 958 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 959 * 960 * We don't want to log an error since we do not want to give userspace a way to do a 961 * denial-of-service attack on the syslog / diskspace. 962 */ 963 return ret; 964 } 965 966 /* PCM prepare ops for non-DPCM streams */ 967 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 968 { 969 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 970 int ret; 971 972 snd_soc_dpcm_mutex_lock(rtd); 973 ret = __soc_pcm_prepare(rtd, substream); 974 snd_soc_dpcm_mutex_unlock(rtd); 975 976 /* 977 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 978 * 979 * We don't want to log an error since we do not want to give userspace a way to do a 980 * denial-of-service attack on the syslog / diskspace. 981 */ 982 return ret; 983 } 984 985 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 986 unsigned int mask) 987 { 988 struct snd_interval *interval; 989 int channels = hweight_long(mask); 990 991 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 992 interval->min = channels; 993 interval->max = channels; 994 } 995 996 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 997 struct snd_pcm_substream *substream, int rollback) 998 { 999 struct snd_soc_dai *dai; 1000 int i; 1001 1002 snd_soc_dpcm_mutex_assert_held(rtd); 1003 1004 /* clear the corresponding DAIs parameters when going to be inactive */ 1005 for_each_rtd_dais(rtd, i, dai) { 1006 if (snd_soc_dai_active(dai) == 1) 1007 soc_pcm_set_dai_params(dai, NULL); 1008 1009 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) { 1010 if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai)) 1011 snd_soc_dai_digital_mute(dai, 1, substream->stream); 1012 } 1013 } 1014 1015 /* run the stream event */ 1016 snd_soc_dapm_stream_stop(rtd, substream->stream); 1017 1018 /* free any machine hw params */ 1019 snd_soc_link_hw_free(substream, rollback); 1020 1021 /* free any component resources */ 1022 snd_soc_pcm_component_hw_free(substream, rollback); 1023 1024 /* now free hw params for the DAIs */ 1025 for_each_rtd_dais(rtd, i, dai) 1026 if (snd_soc_dai_stream_valid(dai, substream->stream)) 1027 snd_soc_dai_hw_free(dai, substream, rollback); 1028 1029 return 0; 1030 } 1031 1032 /* 1033 * Frees resources allocated by hw_params, can be called multiple times 1034 */ 1035 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 1036 struct snd_pcm_substream *substream) 1037 { 1038 return soc_pcm_hw_clean(rtd, substream, 0); 1039 } 1040 1041 /* hw_free PCM ops for non-DPCM streams */ 1042 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 1043 { 1044 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1045 int ret; 1046 1047 snd_soc_dpcm_mutex_lock(rtd); 1048 ret = __soc_pcm_hw_free(rtd, substream); 1049 snd_soc_dpcm_mutex_unlock(rtd); 1050 return ret; 1051 } 1052 1053 /* 1054 * Called by ALSA when the hardware params are set by application. This 1055 * function can also be called multiple times and can allocate buffers 1056 * (using snd_pcm_lib_* ). It's non-atomic. 1057 */ 1058 static int __soc_pcm_hw_params(struct snd_pcm_substream *substream, 1059 struct snd_pcm_hw_params *params) 1060 { 1061 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1062 struct snd_soc_dai *cpu_dai; 1063 struct snd_soc_dai *codec_dai; 1064 struct snd_pcm_hw_params tmp_params; 1065 int i, ret = 0; 1066 1067 snd_soc_dpcm_mutex_assert_held(rtd); 1068 1069 ret = soc_pcm_params_symmetry(substream, params); 1070 if (ret) 1071 goto out; 1072 1073 ret = snd_soc_link_hw_params(substream, params); 1074 if (ret < 0) 1075 goto out; 1076 1077 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1078 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream); 1079 1080 /* 1081 * Skip CODECs which don't support the current stream type, 1082 * the idea being that if a CODEC is not used for the currently 1083 * set up transfer direction, it should not need to be 1084 * configured, especially since the configuration used might 1085 * not even be supported by that CODEC. There may be cases 1086 * however where a CODEC needs to be set up although it is 1087 * actually not being used for the transfer, e.g. if a 1088 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1089 * for the DAI link including a playback-only CODEC. 1090 * If this becomes necessary, we will have to augment the 1091 * machine driver setup with information on how to act, so 1092 * we can do the right thing here. 1093 */ 1094 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1095 continue; 1096 1097 /* copy params for each codec */ 1098 tmp_params = *params; 1099 1100 /* fixup params based on TDM slot masks */ 1101 if (tdm_mask) 1102 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask); 1103 1104 ret = snd_soc_dai_hw_params(codec_dai, substream, 1105 &tmp_params); 1106 if(ret < 0) 1107 goto out; 1108 1109 soc_pcm_set_dai_params(codec_dai, &tmp_params); 1110 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai); 1111 } 1112 1113 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1114 struct snd_soc_dai_link_ch_map *ch_maps; 1115 unsigned int ch_mask = 0; 1116 int j; 1117 1118 /* 1119 * Skip CPUs which don't support the current stream 1120 * type. See soc_pcm_init_runtime_hw() for more details 1121 */ 1122 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1123 continue; 1124 1125 /* copy params for each cpu */ 1126 tmp_params = *params; 1127 1128 /* 1129 * construct cpu channel mask by combining ch_mask of each 1130 * codec which maps to the cpu. 1131 * see 1132 * soc.h :: [dai_link->ch_maps Image sample] 1133 */ 1134 for_each_rtd_ch_maps(rtd, j, ch_maps) 1135 if (ch_maps->cpu == i) 1136 ch_mask |= ch_maps->ch_mask; 1137 1138 /* fixup cpu channel number */ 1139 if (ch_mask) 1140 soc_pcm_codec_params_fixup(&tmp_params, ch_mask); 1141 1142 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params); 1143 if (ret < 0) 1144 goto out; 1145 1146 /* store the parameters for each DAI */ 1147 soc_pcm_set_dai_params(cpu_dai, &tmp_params); 1148 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai); 1149 } 1150 1151 ret = snd_soc_pcm_component_hw_params(substream, params); 1152 out: 1153 if (ret < 0) 1154 soc_pcm_hw_clean(rtd, substream, 1); 1155 1156 return soc_pcm_ret(rtd, ret); 1157 } 1158 1159 /* hw_params PCM ops for non-DPCM streams */ 1160 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1161 struct snd_pcm_hw_params *params) 1162 { 1163 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1164 int ret; 1165 1166 snd_soc_dpcm_mutex_lock(rtd); 1167 ret = __soc_pcm_hw_params(substream, params); 1168 snd_soc_dpcm_mutex_unlock(rtd); 1169 return ret; 1170 } 1171 1172 #define TRIGGER_MAX 3 1173 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = { 1174 [SND_SOC_TRIGGER_ORDER_DEFAULT] = { 1175 snd_soc_link_trigger, 1176 snd_soc_pcm_component_trigger, 1177 snd_soc_pcm_dai_trigger, 1178 }, 1179 [SND_SOC_TRIGGER_ORDER_LDC] = { 1180 snd_soc_link_trigger, 1181 snd_soc_pcm_dai_trigger, 1182 snd_soc_pcm_component_trigger, 1183 }, 1184 }; 1185 1186 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1187 { 1188 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 1189 struct snd_soc_component *component; 1190 int ret = 0, r = 0, i; 1191 int rollback = 0; 1192 int start = 0, stop = 0; 1193 1194 /* 1195 * select START/STOP sequence 1196 */ 1197 for_each_rtd_components(rtd, i, component) { 1198 if (component->driver->trigger_start) 1199 start = component->driver->trigger_start; 1200 if (component->driver->trigger_stop) 1201 stop = component->driver->trigger_stop; 1202 } 1203 if (rtd->dai_link->trigger_start) 1204 start = rtd->dai_link->trigger_start; 1205 if (rtd->dai_link->trigger_stop) 1206 stop = rtd->dai_link->trigger_stop; 1207 1208 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX || 1209 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX) 1210 return -EINVAL; 1211 1212 /* 1213 * START 1214 */ 1215 switch (cmd) { 1216 case SNDRV_PCM_TRIGGER_START: 1217 case SNDRV_PCM_TRIGGER_RESUME: 1218 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1219 for (i = 0; i < TRIGGER_MAX; i++) { 1220 r = trigger[start][i](substream, cmd, 0); 1221 if (r < 0) 1222 break; 1223 } 1224 } 1225 1226 /* 1227 * Rollback if START failed 1228 * find correspond STOP command 1229 */ 1230 if (r < 0) { 1231 rollback = 1; 1232 ret = r; 1233 switch (cmd) { 1234 case SNDRV_PCM_TRIGGER_START: 1235 cmd = SNDRV_PCM_TRIGGER_STOP; 1236 break; 1237 case SNDRV_PCM_TRIGGER_RESUME: 1238 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1239 break; 1240 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1241 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1242 break; 1243 } 1244 } 1245 1246 /* 1247 * STOP 1248 */ 1249 switch (cmd) { 1250 case SNDRV_PCM_TRIGGER_STOP: 1251 case SNDRV_PCM_TRIGGER_SUSPEND: 1252 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1253 for (i = TRIGGER_MAX; i > 0; i--) { 1254 r = trigger[stop][i - 1](substream, cmd, rollback); 1255 if (r < 0) 1256 ret = r; 1257 } 1258 } 1259 1260 return ret; 1261 } 1262 1263 /* 1264 * soc level wrapper for pointer callback 1265 * If cpu_dai, codec_dai, component driver has the delay callback, then 1266 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1267 */ 1268 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1269 { 1270 struct snd_pcm_runtime *runtime = substream->runtime; 1271 snd_pcm_uframes_t offset = 0; 1272 snd_pcm_sframes_t codec_delay = 0; 1273 snd_pcm_sframes_t cpu_delay = 0; 1274 1275 offset = snd_soc_pcm_component_pointer(substream); 1276 1277 /* should be called *after* snd_soc_pcm_component_pointer() */ 1278 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1279 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1280 1281 runtime->delay = cpu_delay + codec_delay; 1282 1283 return offset; 1284 } 1285 1286 /* connect a FE and BE */ 1287 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1288 struct snd_soc_pcm_runtime *be, int stream) 1289 { 1290 struct snd_pcm_substream *fe_substream; 1291 struct snd_pcm_substream *be_substream; 1292 struct snd_soc_dpcm *dpcm; 1293 1294 snd_soc_dpcm_mutex_assert_held(fe); 1295 1296 /* only add new dpcms */ 1297 for_each_dpcm_be(fe, stream, dpcm) 1298 if (dpcm->be == be) 1299 return 0; 1300 1301 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1302 be_substream = snd_soc_dpcm_get_substream(be, stream); 1303 1304 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) 1305 return snd_soc_ret(be->dev, -EINVAL, 1306 "%s: %s is atomic but %s is nonatomic, invalid configuration\n", 1307 __func__, fe->dai_link->name, be->dai_link->name); 1308 1309 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1310 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n"); 1311 be_substream->pcm->nonatomic = 1; 1312 } 1313 1314 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1315 if (!dpcm) 1316 return -ENOMEM; 1317 1318 dpcm->be = be; 1319 dpcm->fe = fe; 1320 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1321 snd_pcm_stream_lock_irq(fe_substream); 1322 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1323 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1324 snd_pcm_stream_unlock_irq(fe_substream); 1325 1326 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1327 snd_pcm_direction_name(stream), fe->dai_link->name, 1328 stream ? "<-" : "->", be->dai_link->name); 1329 1330 dpcm_create_debugfs_state(dpcm, stream); 1331 1332 return 1; 1333 } 1334 1335 /* reparent a BE onto another FE */ 1336 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1337 struct snd_soc_pcm_runtime *be, int stream) 1338 { 1339 struct snd_soc_dpcm *dpcm; 1340 struct snd_pcm_substream *fe_substream, *be_substream; 1341 1342 /* reparent if BE is connected to other FEs */ 1343 if (!be->dpcm[stream].users) 1344 return; 1345 1346 be_substream = snd_soc_dpcm_get_substream(be, stream); 1347 if (!be_substream) 1348 return; 1349 1350 for_each_dpcm_fe(be, stream, dpcm) { 1351 if (dpcm->fe == fe) 1352 continue; 1353 1354 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1355 snd_pcm_direction_name(stream), 1356 dpcm->fe->dai_link->name, 1357 stream ? "<-" : "->", dpcm->be->dai_link->name); 1358 1359 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1360 be_substream->runtime = fe_substream->runtime; 1361 break; 1362 } 1363 } 1364 1365 /* disconnect a BE and FE */ 1366 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1367 { 1368 struct snd_soc_dpcm *dpcm, *d; 1369 struct snd_pcm_substream *substream = snd_soc_dpcm_get_substream(fe, stream); 1370 LIST_HEAD(deleted_dpcms); 1371 1372 snd_soc_dpcm_mutex_assert_held(fe); 1373 1374 snd_pcm_stream_lock_irq(substream); 1375 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1376 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1377 snd_pcm_direction_name(stream), 1378 dpcm->be->dai_link->name); 1379 1380 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1381 continue; 1382 1383 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1384 snd_pcm_direction_name(stream), fe->dai_link->name, 1385 stream ? "<-" : "->", dpcm->be->dai_link->name); 1386 1387 /* BEs still alive need new FE */ 1388 dpcm_be_reparent(fe, dpcm->be, stream); 1389 1390 list_del(&dpcm->list_be); 1391 list_move(&dpcm->list_fe, &deleted_dpcms); 1392 } 1393 snd_pcm_stream_unlock_irq(substream); 1394 1395 while (!list_empty(&deleted_dpcms)) { 1396 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1397 list_fe); 1398 list_del(&dpcm->list_fe); 1399 dpcm_remove_debugfs_state(dpcm); 1400 kfree(dpcm); 1401 } 1402 } 1403 1404 /* get BE for DAI widget and stream */ 1405 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1406 struct snd_soc_dapm_widget *widget, int stream) 1407 { 1408 struct snd_soc_pcm_runtime *be; 1409 struct snd_soc_dapm_widget *w; 1410 struct snd_soc_dai *dai; 1411 int i; 1412 1413 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1414 1415 for_each_card_rtds(card, be) { 1416 1417 if (!be->dai_link->no_pcm) 1418 continue; 1419 1420 if (!snd_soc_dpcm_get_substream(be, stream)) 1421 continue; 1422 1423 for_each_rtd_dais(be, i, dai) { 1424 w = snd_soc_dai_get_widget(dai, stream); 1425 1426 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1427 w ? w->name : "(not set)"); 1428 1429 if (w == widget) 1430 return be; 1431 } 1432 } 1433 1434 /* Widget provided is not a BE */ 1435 return NULL; 1436 } 1437 1438 int widget_in_list(struct snd_soc_dapm_widget_list *list, 1439 struct snd_soc_dapm_widget *widget) 1440 { 1441 struct snd_soc_dapm_widget *w; 1442 int i; 1443 1444 for_each_dapm_widgets(list, i, w) 1445 if (widget == w) 1446 return 1; 1447 1448 return 0; 1449 } 1450 EXPORT_SYMBOL_GPL(widget_in_list); 1451 1452 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1453 { 1454 struct snd_soc_card *card = widget->dapm->card; 1455 struct snd_soc_pcm_runtime *rtd; 1456 int stream; 1457 1458 /* adjust dir to stream */ 1459 if (dir == SND_SOC_DAPM_DIR_OUT) 1460 stream = SNDRV_PCM_STREAM_PLAYBACK; 1461 else 1462 stream = SNDRV_PCM_STREAM_CAPTURE; 1463 1464 rtd = dpcm_get_be(card, widget, stream); 1465 if (rtd) 1466 return true; 1467 1468 return false; 1469 } 1470 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1471 1472 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1473 int stream, struct snd_soc_dapm_widget_list **list) 1474 { 1475 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0); 1476 int paths; 1477 1478 if (fe->dai_link->num_cpus > 1) 1479 return snd_soc_ret(fe->dev, -EINVAL, 1480 "%s doesn't support Multi CPU yet\n", __func__); 1481 1482 /* get number of valid DAI paths and their widgets */ 1483 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1484 fe->card->component_chaining ? 1485 NULL : dpcm_end_walk_at_be); 1486 1487 if (paths > 0) 1488 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1489 snd_pcm_direction_name(stream)); 1490 else if (paths == 0) 1491 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1492 snd_pcm_direction_name(stream)); 1493 1494 return paths; 1495 } 1496 1497 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1498 { 1499 snd_soc_dapm_dai_free_widgets(list); 1500 } 1501 1502 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1503 struct snd_soc_dapm_widget_list *list) 1504 { 1505 struct snd_soc_dai *dai; 1506 unsigned int i; 1507 1508 /* is there a valid DAI widget for this BE */ 1509 for_each_rtd_dais(dpcm->be, i, dai) { 1510 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1511 1512 /* 1513 * The BE is pruned only if none of the dai 1514 * widgets are in the active list. 1515 */ 1516 if (widget && widget_in_list(list, widget)) 1517 return true; 1518 } 1519 1520 return false; 1521 } 1522 1523 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1524 struct snd_soc_dapm_widget_list **list_) 1525 { 1526 struct snd_soc_dpcm *dpcm; 1527 int prune = 0; 1528 1529 /* Destroy any old FE <--> BE connections */ 1530 for_each_dpcm_be(fe, stream, dpcm) { 1531 if (dpcm_be_is_active(dpcm, stream, *list_)) 1532 continue; 1533 1534 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1535 snd_pcm_direction_name(stream), 1536 dpcm->be->dai_link->name, fe->dai_link->name); 1537 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1538 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1539 prune++; 1540 } 1541 1542 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1543 return prune; 1544 } 1545 1546 int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1547 struct snd_soc_dapm_widget_list **list_) 1548 { 1549 struct snd_soc_card *card = fe->card; 1550 struct snd_soc_dapm_widget_list *list = *list_; 1551 struct snd_soc_pcm_runtime *be; 1552 struct snd_soc_dapm_widget *widget; 1553 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1554 int i, new = 0, err; 1555 1556 /* don't connect if FE is not running */ 1557 if (!fe_substream->runtime && !fe->fe_compr) 1558 return new; 1559 1560 /* Create any new FE <--> BE connections */ 1561 for_each_dapm_widgets(list, i, widget) { 1562 1563 switch (widget->id) { 1564 case snd_soc_dapm_dai_in: 1565 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1566 continue; 1567 break; 1568 case snd_soc_dapm_dai_out: 1569 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1570 continue; 1571 break; 1572 default: 1573 continue; 1574 } 1575 1576 /* is there a valid BE rtd for this widget */ 1577 be = dpcm_get_be(card, widget, stream); 1578 if (!be) { 1579 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1580 widget->name); 1581 continue; 1582 } 1583 1584 /* 1585 * Filter for systems with 'component_chaining' enabled. 1586 * This helps to avoid unnecessary re-configuration of an 1587 * already active BE on such systems and ensures the BE DAI 1588 * widget is powered ON after hw_params() BE DAI callback. 1589 */ 1590 if (fe->card->component_chaining && 1591 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1592 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1593 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1594 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1595 continue; 1596 1597 /* newly connected FE and BE */ 1598 err = dpcm_be_connect(fe, be, stream); 1599 if (err < 0) { 1600 dev_err(fe->dev, "ASoC: can't connect %s\n", 1601 widget->name); 1602 break; 1603 } else if (err == 0) /* already connected */ 1604 continue; 1605 1606 /* new */ 1607 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1608 new++; 1609 } 1610 1611 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1612 return new; 1613 } 1614 1615 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1616 { 1617 struct snd_soc_dpcm *dpcm; 1618 1619 for_each_dpcm_be(fe, stream, dpcm) 1620 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1621 } 1622 1623 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1624 int do_hw_free, struct snd_soc_dpcm *last) 1625 { 1626 struct snd_soc_dpcm *dpcm; 1627 1628 /* disable any enabled and non active backends */ 1629 for_each_dpcm_be(fe, stream, dpcm) { 1630 struct snd_soc_pcm_runtime *be = dpcm->be; 1631 struct snd_pcm_substream *be_substream = 1632 snd_soc_dpcm_get_substream(be, stream); 1633 1634 if (dpcm == last) 1635 return; 1636 1637 /* is this op for this BE ? */ 1638 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1639 continue; 1640 1641 if (be->dpcm[stream].users == 0) { 1642 dev_err(be->dev, "ASoC: no users %s at close - state %s\n", 1643 snd_pcm_direction_name(stream), 1644 dpcm_state_string(be->dpcm[stream].state)); 1645 continue; 1646 } 1647 1648 if (--be->dpcm[stream].users != 0) 1649 continue; 1650 1651 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1652 if (!do_hw_free) 1653 continue; 1654 1655 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1656 __soc_pcm_hw_free(be, be_substream); 1657 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1658 } 1659 } 1660 1661 __soc_pcm_close(be, be_substream); 1662 be_substream->runtime = NULL; 1663 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1664 } 1665 } 1666 1667 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1668 { 1669 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1670 struct snd_soc_pcm_runtime *be; 1671 struct snd_soc_dpcm *dpcm; 1672 int err, count = 0; 1673 1674 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1675 for_each_dpcm_be(fe, stream, dpcm) { 1676 struct snd_pcm_substream *be_substream; 1677 1678 be = dpcm->be; 1679 be_substream = snd_soc_dpcm_get_substream(be, stream); 1680 1681 if (!be_substream) { 1682 dev_err(be->dev, "ASoC: no backend %s stream\n", 1683 snd_pcm_direction_name(stream)); 1684 continue; 1685 } 1686 1687 /* is this op for this BE ? */ 1688 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 1689 continue; 1690 1691 /* first time the dpcm is open ? */ 1692 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1693 dev_err(be->dev, "ASoC: too many users %s at open %s\n", 1694 snd_pcm_direction_name(stream), 1695 dpcm_state_string(be->dpcm[stream].state)); 1696 continue; 1697 } 1698 1699 if (be->dpcm[stream].users++ != 0) 1700 continue; 1701 1702 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1703 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1704 continue; 1705 1706 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1707 snd_pcm_direction_name(stream), be->dai_link->name); 1708 1709 be_substream->runtime = fe_substream->runtime; 1710 err = __soc_pcm_open(be, be_substream); 1711 if (err < 0) { 1712 be->dpcm[stream].users--; 1713 if (be->dpcm[stream].users < 0) 1714 dev_err(be->dev, "ASoC: no users %s at unwind %s\n", 1715 snd_pcm_direction_name(stream), 1716 dpcm_state_string(be->dpcm[stream].state)); 1717 1718 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1719 goto unwind; 1720 } 1721 be->dpcm[stream].be_start = 0; 1722 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1723 count++; 1724 } 1725 1726 return count; 1727 1728 unwind: 1729 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1730 1731 return soc_pcm_ret(fe, err); 1732 } 1733 1734 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1735 { 1736 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1737 struct snd_pcm_runtime *runtime = substream->runtime; 1738 struct snd_pcm_hardware *hw = &runtime->hw; 1739 struct snd_soc_dai *dai; 1740 int stream = substream->stream; 1741 u64 formats = hw->formats; 1742 int i; 1743 1744 soc_pcm_hw_init(hw); 1745 1746 if (formats) 1747 hw->formats &= formats; 1748 1749 for_each_rtd_cpu_dais(fe, i, dai) { 1750 const struct snd_soc_pcm_stream *cpu_stream; 1751 1752 /* 1753 * Skip CPUs which don't support the current stream 1754 * type. See soc_pcm_init_runtime_hw() for more details 1755 */ 1756 if (!snd_soc_dai_stream_valid(dai, stream)) 1757 continue; 1758 1759 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1760 1761 soc_pcm_hw_update_rate(hw, cpu_stream); 1762 soc_pcm_hw_update_chan(hw, cpu_stream); 1763 soc_pcm_hw_update_format(hw, cpu_stream); 1764 } 1765 1766 } 1767 1768 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1769 { 1770 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1771 struct snd_pcm_runtime *runtime = substream->runtime; 1772 struct snd_pcm_hardware *hw = &runtime->hw; 1773 struct snd_soc_dpcm *dpcm; 1774 struct snd_soc_dai *dai; 1775 int stream = substream->stream; 1776 1777 if (!fe->dai_link->dpcm_merged_format) 1778 return; 1779 1780 /* 1781 * It returns merged BE codec format 1782 * if FE want to use it (= dpcm_merged_format) 1783 */ 1784 1785 for_each_dpcm_be(fe, stream, dpcm) { 1786 struct snd_soc_pcm_runtime *be = dpcm->be; 1787 const struct snd_soc_pcm_stream *codec_stream; 1788 int i; 1789 1790 for_each_rtd_codec_dais(be, i, dai) { 1791 /* 1792 * Skip CODECs which don't support the current stream 1793 * type. See soc_pcm_init_runtime_hw() for more details 1794 */ 1795 if (!snd_soc_dai_stream_valid(dai, stream)) 1796 continue; 1797 1798 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1799 1800 soc_pcm_hw_update_format(hw, codec_stream); 1801 } 1802 } 1803 } 1804 1805 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1806 { 1807 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1808 struct snd_pcm_runtime *runtime = substream->runtime; 1809 struct snd_pcm_hardware *hw = &runtime->hw; 1810 struct snd_soc_dpcm *dpcm; 1811 int stream = substream->stream; 1812 1813 if (!fe->dai_link->dpcm_merged_chan) 1814 return; 1815 1816 /* 1817 * It returns merged BE codec channel; 1818 * if FE want to use it (= dpcm_merged_chan) 1819 */ 1820 1821 for_each_dpcm_be(fe, stream, dpcm) { 1822 struct snd_soc_pcm_runtime *be = dpcm->be; 1823 const struct snd_soc_pcm_stream *cpu_stream; 1824 struct snd_soc_dai *dai; 1825 int i; 1826 1827 for_each_rtd_cpu_dais(be, i, dai) { 1828 /* 1829 * Skip CPUs which don't support the current stream 1830 * type. See soc_pcm_init_runtime_hw() for more details 1831 */ 1832 if (!snd_soc_dai_stream_valid(dai, stream)) 1833 continue; 1834 1835 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1836 1837 soc_pcm_hw_update_chan(hw, cpu_stream); 1838 } 1839 1840 /* 1841 * chan min/max cannot be enforced if there are multiple CODEC 1842 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1843 */ 1844 if (be->dai_link->num_codecs == 1) { 1845 const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1846 snd_soc_rtd_to_codec(be, 0), stream); 1847 1848 soc_pcm_hw_update_chan(hw, codec_stream); 1849 } 1850 } 1851 } 1852 1853 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1854 { 1855 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1856 struct snd_pcm_runtime *runtime = substream->runtime; 1857 struct snd_pcm_hardware *hw = &runtime->hw; 1858 struct snd_soc_dpcm *dpcm; 1859 int stream = substream->stream; 1860 1861 if (!fe->dai_link->dpcm_merged_rate) 1862 return; 1863 1864 /* 1865 * It returns merged BE codec channel; 1866 * if FE want to use it (= dpcm_merged_chan) 1867 */ 1868 1869 for_each_dpcm_be(fe, stream, dpcm) { 1870 struct snd_soc_pcm_runtime *be = dpcm->be; 1871 const struct snd_soc_pcm_stream *pcm; 1872 struct snd_soc_dai *dai; 1873 int i; 1874 1875 for_each_rtd_dais(be, i, dai) { 1876 /* 1877 * Skip DAIs which don't support the current stream 1878 * type. See soc_pcm_init_runtime_hw() for more details 1879 */ 1880 if (!snd_soc_dai_stream_valid(dai, stream)) 1881 continue; 1882 1883 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1884 1885 soc_pcm_hw_update_rate(hw, pcm); 1886 } 1887 } 1888 } 1889 1890 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1891 int stream) 1892 { 1893 struct snd_soc_dpcm *dpcm; 1894 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1895 struct snd_soc_dai *fe_cpu_dai; 1896 int err = 0; 1897 int i; 1898 1899 /* apply symmetry for FE */ 1900 soc_pcm_update_symmetry(fe_substream); 1901 1902 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1903 /* Symmetry only applies if we've got an active stream. */ 1904 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1905 if (err < 0) 1906 goto error; 1907 } 1908 1909 /* apply symmetry for BE */ 1910 for_each_dpcm_be(fe, stream, dpcm) { 1911 struct snd_soc_pcm_runtime *be = dpcm->be; 1912 struct snd_pcm_substream *be_substream = 1913 snd_soc_dpcm_get_substream(be, stream); 1914 struct snd_soc_pcm_runtime *rtd; 1915 struct snd_soc_dai *dai; 1916 1917 /* A backend may not have the requested substream */ 1918 if (!be_substream) 1919 continue; 1920 1921 rtd = snd_soc_substream_to_rtd(be_substream); 1922 if (rtd->dai_link->be_hw_params_fixup) 1923 continue; 1924 1925 soc_pcm_update_symmetry(be_substream); 1926 1927 /* Symmetry only applies if we've got an active stream. */ 1928 for_each_rtd_dais(rtd, i, dai) { 1929 err = soc_pcm_apply_symmetry(fe_substream, dai); 1930 if (err < 0) 1931 goto error; 1932 } 1933 } 1934 error: 1935 return soc_pcm_ret(fe, err); 1936 } 1937 1938 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1939 { 1940 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 1941 int stream = fe_substream->stream, ret = 0; 1942 1943 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1944 1945 ret = dpcm_be_dai_startup(fe, stream); 1946 if (ret < 0) 1947 goto be_err; 1948 1949 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1950 1951 /* start the DAI frontend */ 1952 ret = __soc_pcm_open(fe, fe_substream); 1953 if (ret < 0) 1954 goto unwind; 1955 1956 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1957 1958 dpcm_runtime_setup_fe(fe_substream); 1959 1960 dpcm_runtime_setup_be_format(fe_substream); 1961 dpcm_runtime_setup_be_chan(fe_substream); 1962 dpcm_runtime_setup_be_rate(fe_substream); 1963 1964 ret = dpcm_apply_symmetry(fe_substream, stream); 1965 1966 unwind: 1967 if (ret < 0) 1968 dpcm_be_dai_startup_unwind(fe, stream); 1969 be_err: 1970 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1971 1972 return soc_pcm_ret(fe, ret); 1973 } 1974 1975 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1976 { 1977 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 1978 int stream = substream->stream; 1979 1980 snd_soc_dpcm_mutex_assert_held(fe); 1981 1982 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1983 1984 /* shutdown the BEs */ 1985 dpcm_be_dai_shutdown(fe, stream); 1986 1987 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1988 1989 /* now shutdown the frontend */ 1990 __soc_pcm_close(fe, substream); 1991 1992 /* run the stream stop event */ 1993 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1994 1995 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1996 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1997 return 0; 1998 } 1999 2000 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 2001 { 2002 struct snd_soc_dpcm *dpcm; 2003 2004 /* only hw_params backends that are either sinks or sources 2005 * to this frontend DAI */ 2006 for_each_dpcm_be(fe, stream, dpcm) { 2007 2008 struct snd_soc_pcm_runtime *be = dpcm->be; 2009 struct snd_pcm_substream *be_substream = 2010 snd_soc_dpcm_get_substream(be, stream); 2011 2012 /* is this op for this BE ? */ 2013 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2014 continue; 2015 2016 /* only free hw when no longer used - check all FEs */ 2017 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2018 continue; 2019 2020 /* do not free hw if this BE is used by other FE */ 2021 if (be->dpcm[stream].users > 1) 2022 continue; 2023 2024 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2025 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2026 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2027 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 2028 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2029 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2030 continue; 2031 2032 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 2033 be->dai_link->name); 2034 2035 __soc_pcm_hw_free(be, be_substream); 2036 2037 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2038 } 2039 } 2040 2041 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 2042 { 2043 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2044 int stream = substream->stream; 2045 2046 snd_soc_dpcm_mutex_lock(fe); 2047 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2048 2049 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 2050 2051 /* call hw_free on the frontend */ 2052 soc_pcm_hw_clean(fe, substream, 0); 2053 2054 /* only hw_params backends that are either sinks or sources 2055 * to this frontend DAI */ 2056 dpcm_be_dai_hw_free(fe, stream); 2057 2058 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 2059 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2060 2061 snd_soc_dpcm_mutex_unlock(fe); 2062 return 0; 2063 } 2064 2065 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 2066 { 2067 struct snd_soc_pcm_runtime *be; 2068 struct snd_pcm_substream *be_substream; 2069 struct snd_soc_dpcm *dpcm; 2070 int ret; 2071 2072 for_each_dpcm_be(fe, stream, dpcm) { 2073 struct snd_pcm_hw_params hw_params; 2074 2075 be = dpcm->be; 2076 be_substream = snd_soc_dpcm_get_substream(be, stream); 2077 2078 /* is this op for this BE ? */ 2079 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2080 continue; 2081 2082 /* copy params for each dpcm */ 2083 memcpy(&hw_params, &fe->dpcm[stream].hw_params, 2084 sizeof(struct snd_pcm_hw_params)); 2085 2086 /* perform any hw_params fixups */ 2087 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params); 2088 if (ret < 0) 2089 goto unwind; 2090 2091 /* copy the fixed-up hw params for BE dai */ 2092 memcpy(&be->dpcm[stream].hw_params, &hw_params, 2093 sizeof(struct snd_pcm_hw_params)); 2094 2095 /* only allow hw_params() if no connected FEs are running */ 2096 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2097 continue; 2098 2099 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2100 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2101 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2102 continue; 2103 2104 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2105 be->dai_link->name); 2106 2107 ret = __soc_pcm_hw_params(be_substream, &hw_params); 2108 if (ret < 0) 2109 goto unwind; 2110 2111 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2112 } 2113 return 0; 2114 2115 unwind: 2116 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2117 __func__, be->dai_link->name, ret); 2118 2119 /* disable any enabled and non active backends */ 2120 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2121 be = dpcm->be; 2122 be_substream = snd_soc_dpcm_get_substream(be, stream); 2123 2124 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2125 continue; 2126 2127 /* only allow hw_free() if no connected FEs are running */ 2128 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2129 continue; 2130 2131 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2132 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2133 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2134 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2135 continue; 2136 2137 __soc_pcm_hw_free(be, be_substream); 2138 } 2139 2140 return ret; 2141 } 2142 2143 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2144 struct snd_pcm_hw_params *params) 2145 { 2146 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2147 int ret, stream = substream->stream; 2148 2149 snd_soc_dpcm_mutex_lock(fe); 2150 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2151 2152 memcpy(&fe->dpcm[stream].hw_params, params, 2153 sizeof(struct snd_pcm_hw_params)); 2154 ret = dpcm_be_dai_hw_params(fe, stream); 2155 if (ret < 0) 2156 goto out; 2157 2158 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2159 fe->dai_link->name, params_rate(params), 2160 params_channels(params), params_format(params)); 2161 2162 /* call hw_params on the frontend */ 2163 ret = __soc_pcm_hw_params(substream, params); 2164 if (ret < 0) 2165 dpcm_be_dai_hw_free(fe, stream); 2166 else 2167 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2168 2169 out: 2170 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2171 snd_soc_dpcm_mutex_unlock(fe); 2172 2173 return soc_pcm_ret(fe, ret); 2174 } 2175 2176 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2177 int cmd) 2178 { 2179 struct snd_soc_pcm_runtime *be; 2180 bool pause_stop_transition; 2181 struct snd_soc_dpcm *dpcm; 2182 unsigned long flags; 2183 int ret = 0; 2184 2185 for_each_dpcm_be(fe, stream, dpcm) { 2186 struct snd_pcm_substream *be_substream; 2187 2188 be = dpcm->be; 2189 be_substream = snd_soc_dpcm_get_substream(be, stream); 2190 2191 snd_pcm_stream_lock_irqsave_nested(be_substream, flags); 2192 2193 /* is this op for this BE ? */ 2194 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2195 goto next; 2196 2197 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2198 be->dai_link->name, cmd); 2199 2200 switch (cmd) { 2201 case SNDRV_PCM_TRIGGER_START: 2202 if (!be->dpcm[stream].be_start && 2203 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2204 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2205 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2206 goto next; 2207 2208 be->dpcm[stream].be_start++; 2209 if (be->dpcm[stream].be_start != 1) 2210 goto next; 2211 2212 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED) 2213 ret = soc_pcm_trigger(be_substream, 2214 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 2215 else 2216 ret = soc_pcm_trigger(be_substream, 2217 SNDRV_PCM_TRIGGER_START); 2218 if (ret) { 2219 be->dpcm[stream].be_start--; 2220 goto next; 2221 } 2222 2223 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2224 break; 2225 case SNDRV_PCM_TRIGGER_RESUME: 2226 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2227 goto next; 2228 2229 be->dpcm[stream].be_start++; 2230 if (be->dpcm[stream].be_start != 1) 2231 goto next; 2232 2233 ret = soc_pcm_trigger(be_substream, cmd); 2234 if (ret) { 2235 be->dpcm[stream].be_start--; 2236 goto next; 2237 } 2238 2239 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2240 break; 2241 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2242 if (!be->dpcm[stream].be_start && 2243 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2244 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2245 goto next; 2246 2247 fe->dpcm[stream].fe_pause = false; 2248 be->dpcm[stream].be_pause--; 2249 2250 be->dpcm[stream].be_start++; 2251 if (be->dpcm[stream].be_start != 1) 2252 goto next; 2253 2254 ret = soc_pcm_trigger(be_substream, cmd); 2255 if (ret) { 2256 be->dpcm[stream].be_start--; 2257 goto next; 2258 } 2259 2260 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2261 break; 2262 case SNDRV_PCM_TRIGGER_STOP: 2263 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2264 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2265 goto next; 2266 2267 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2268 be->dpcm[stream].be_start--; 2269 2270 if (be->dpcm[stream].be_start != 0) 2271 goto next; 2272 2273 pause_stop_transition = false; 2274 if (fe->dpcm[stream].fe_pause) { 2275 pause_stop_transition = true; 2276 fe->dpcm[stream].fe_pause = false; 2277 be->dpcm[stream].be_pause--; 2278 } 2279 2280 if (be->dpcm[stream].be_pause != 0) 2281 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 2282 else 2283 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP); 2284 2285 if (ret) { 2286 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2287 be->dpcm[stream].be_start++; 2288 if (pause_stop_transition) { 2289 fe->dpcm[stream].fe_pause = true; 2290 be->dpcm[stream].be_pause++; 2291 } 2292 goto next; 2293 } 2294 2295 if (be->dpcm[stream].be_pause != 0) 2296 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2297 else 2298 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2299 2300 break; 2301 case SNDRV_PCM_TRIGGER_SUSPEND: 2302 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2303 goto next; 2304 2305 be->dpcm[stream].be_start--; 2306 if (be->dpcm[stream].be_start != 0) 2307 goto next; 2308 2309 ret = soc_pcm_trigger(be_substream, cmd); 2310 if (ret) { 2311 be->dpcm[stream].be_start++; 2312 goto next; 2313 } 2314 2315 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2316 break; 2317 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2318 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2319 goto next; 2320 2321 fe->dpcm[stream].fe_pause = true; 2322 be->dpcm[stream].be_pause++; 2323 2324 be->dpcm[stream].be_start--; 2325 if (be->dpcm[stream].be_start != 0) 2326 goto next; 2327 2328 ret = soc_pcm_trigger(be_substream, cmd); 2329 if (ret) { 2330 be->dpcm[stream].be_start++; 2331 goto next; 2332 } 2333 2334 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2335 break; 2336 } 2337 next: 2338 snd_pcm_stream_unlock_irqrestore(be_substream, flags); 2339 if (ret) 2340 break; 2341 } 2342 return soc_pcm_ret(fe, ret); 2343 } 2344 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2345 2346 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2347 int cmd, bool fe_first) 2348 { 2349 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2350 int ret; 2351 2352 /* call trigger on the frontend before the backend. */ 2353 if (fe_first) { 2354 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2355 fe->dai_link->name, cmd); 2356 2357 ret = soc_pcm_trigger(substream, cmd); 2358 if (ret < 0) 2359 goto end; 2360 2361 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2362 } 2363 /* call trigger on the frontend after the backend. */ 2364 else { 2365 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2366 if (ret < 0) 2367 goto end; 2368 2369 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2370 fe->dai_link->name, cmd); 2371 2372 ret = soc_pcm_trigger(substream, cmd); 2373 } 2374 end: 2375 return snd_soc_ret(fe->dev, ret, "trigger FE cmd: %d failed\n", cmd); 2376 } 2377 2378 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2379 { 2380 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2381 int stream = substream->stream; 2382 int ret = 0; 2383 int fe_first; 2384 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2385 2386 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2387 2388 switch (trigger) { 2389 case SND_SOC_DPCM_TRIGGER_PRE: 2390 fe_first = true; 2391 break; 2392 case SND_SOC_DPCM_TRIGGER_POST: 2393 fe_first = false; 2394 break; 2395 default: 2396 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2397 fe->dai_link->name); 2398 ret = -EINVAL; 2399 goto out; 2400 } 2401 2402 switch (cmd) { 2403 case SNDRV_PCM_TRIGGER_START: 2404 case SNDRV_PCM_TRIGGER_RESUME: 2405 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2406 case SNDRV_PCM_TRIGGER_DRAIN: 2407 ret = dpcm_dai_trigger_fe_be(substream, cmd, fe_first); 2408 break; 2409 case SNDRV_PCM_TRIGGER_STOP: 2410 case SNDRV_PCM_TRIGGER_SUSPEND: 2411 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2412 ret = dpcm_dai_trigger_fe_be(substream, cmd, !fe_first); 2413 break; 2414 default: 2415 ret = -EINVAL; 2416 break; 2417 } 2418 2419 if (ret < 0) 2420 goto out; 2421 2422 switch (cmd) { 2423 case SNDRV_PCM_TRIGGER_START: 2424 case SNDRV_PCM_TRIGGER_RESUME: 2425 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2426 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2427 break; 2428 case SNDRV_PCM_TRIGGER_STOP: 2429 case SNDRV_PCM_TRIGGER_SUSPEND: 2430 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2431 break; 2432 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2433 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2434 break; 2435 } 2436 2437 out: 2438 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2439 return ret; 2440 } 2441 2442 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2443 { 2444 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2445 int stream = substream->stream; 2446 2447 /* if FE's runtime_update is already set, we're in race; 2448 * process this trigger later at exit 2449 */ 2450 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2451 fe->dpcm[stream].trigger_pending = cmd + 1; 2452 return 0; /* delayed, assuming it's successful */ 2453 } 2454 2455 /* we're alone, let's trigger */ 2456 return dpcm_fe_dai_do_trigger(substream, cmd); 2457 } 2458 2459 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2460 { 2461 struct snd_soc_dpcm *dpcm; 2462 int ret = 0; 2463 2464 for_each_dpcm_be(fe, stream, dpcm) { 2465 2466 struct snd_soc_pcm_runtime *be = dpcm->be; 2467 struct snd_pcm_substream *be_substream = 2468 snd_soc_dpcm_get_substream(be, stream); 2469 2470 /* is this op for this BE ? */ 2471 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2472 continue; 2473 2474 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream)) 2475 continue; 2476 2477 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2478 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2479 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2480 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2481 continue; 2482 2483 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2484 be->dai_link->name); 2485 2486 ret = __soc_pcm_prepare(be, be_substream); 2487 if (ret < 0) 2488 break; 2489 2490 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2491 } 2492 2493 /* 2494 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2495 * 2496 * We don't want to log an error since we do not want to give userspace a way to do a 2497 * denial-of-service attack on the syslog / diskspace. 2498 */ 2499 return ret; 2500 } 2501 2502 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2503 { 2504 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream); 2505 int stream = substream->stream, ret = 0; 2506 2507 snd_soc_dpcm_mutex_lock(fe); 2508 2509 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2510 2511 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2512 2513 ret = dpcm_be_dai_prepare(fe, stream); 2514 if (ret < 0) 2515 goto out; 2516 2517 /* call prepare on the frontend */ 2518 ret = __soc_pcm_prepare(fe, substream); 2519 if (ret < 0) 2520 goto out; 2521 2522 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2523 2524 out: 2525 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2526 snd_soc_dpcm_mutex_unlock(fe); 2527 2528 /* 2529 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity 2530 * 2531 * We don't want to log an error since we do not want to give userspace a way to do a 2532 * denial-of-service attack on the syslog / diskspace. 2533 */ 2534 return ret; 2535 } 2536 2537 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2538 { 2539 int err; 2540 2541 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2542 snd_pcm_direction_name(stream), fe->dai_link->name); 2543 2544 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2545 2546 dpcm_be_dai_hw_free(fe, stream); 2547 2548 dpcm_be_dai_shutdown(fe, stream); 2549 2550 /* run the stream event for each BE */ 2551 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2552 2553 return soc_pcm_ret(fe, err); 2554 } 2555 2556 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2557 { 2558 struct snd_soc_dpcm *dpcm; 2559 int ret = 0; 2560 2561 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2562 snd_pcm_direction_name(stream), fe->dai_link->name); 2563 2564 /* Only start the BE if the FE is ready */ 2565 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2566 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2567 dev_err(fe->dev, "ASoC: FE %s is not ready %s\n", 2568 fe->dai_link->name, dpcm_state_string(fe->dpcm[stream].state)); 2569 ret = -EINVAL; 2570 goto disconnect; 2571 } 2572 2573 /* startup must always be called for new BEs */ 2574 ret = dpcm_be_dai_startup(fe, stream); 2575 if (ret < 0) 2576 goto disconnect; 2577 2578 /* keep going if FE state is > open */ 2579 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2580 return 0; 2581 2582 ret = dpcm_be_dai_hw_params(fe, stream); 2583 if (ret < 0) 2584 goto close; 2585 2586 /* keep going if FE state is > hw_params */ 2587 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2588 return 0; 2589 2590 ret = dpcm_be_dai_prepare(fe, stream); 2591 if (ret < 0) 2592 goto hw_free; 2593 2594 /* run the stream event for each BE */ 2595 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2596 2597 /* keep going if FE state is > prepare */ 2598 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2599 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2600 return 0; 2601 2602 ret = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_START); 2603 if (ret < 0) 2604 goto hw_free; 2605 2606 return 0; 2607 2608 hw_free: 2609 dpcm_be_dai_hw_free(fe, stream); 2610 close: 2611 dpcm_be_dai_shutdown(fe, stream); 2612 disconnect: 2613 /* disconnect any pending BEs */ 2614 for_each_dpcm_be(fe, stream, dpcm) { 2615 struct snd_soc_pcm_runtime *be = dpcm->be; 2616 2617 /* is this op for this BE ? */ 2618 if (!snd_soc_dpcm_can_be_update(fe, be, stream)) 2619 continue; 2620 2621 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2622 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2623 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2624 } 2625 2626 return soc_pcm_ret(fe, ret); 2627 } 2628 2629 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2630 { 2631 struct snd_soc_dapm_widget_list *list; 2632 int stream; 2633 int count, paths; 2634 2635 if (!fe->dai_link->dynamic) 2636 return 0; 2637 2638 if (fe->dai_link->num_cpus > 1) 2639 return snd_soc_ret(fe->dev, -EINVAL, 2640 "%s doesn't support Multi CPU yet\n", __func__); 2641 2642 /* only check active links */ 2643 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0))) 2644 return 0; 2645 2646 /* DAPM sync will call this to update DSP paths */ 2647 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2648 new ? "new" : "old", fe->dai_link->name); 2649 2650 for_each_pcm_streams(stream) { 2651 2652 /* skip if FE doesn't have playback/capture capability */ 2653 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) || 2654 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream)) 2655 continue; 2656 2657 /* skip if FE isn't currently playing/capturing */ 2658 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) || 2659 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream)) 2660 continue; 2661 2662 paths = dpcm_path_get(fe, stream, &list); 2663 if (paths < 0) 2664 return paths; 2665 2666 /* update any playback/capture paths */ 2667 /* 2668 * Find the corresponding BE DAIs that source or sink audio to this 2669 * FE substream. 2670 */ 2671 if (new) 2672 count = dpcm_add_paths(fe, stream, &list); 2673 else 2674 count = dpcm_prune_paths(fe, stream, &list); 2675 if (count) { 2676 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2677 if (new) 2678 dpcm_run_update_startup(fe, stream); 2679 else 2680 dpcm_run_update_shutdown(fe, stream); 2681 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2682 2683 dpcm_clear_pending_state(fe, stream); 2684 dpcm_be_disconnect(fe, stream); 2685 } 2686 2687 dpcm_path_put(&list); 2688 } 2689 2690 return 0; 2691 } 2692 2693 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2694 * any DAI links. 2695 */ 2696 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2697 { 2698 struct snd_soc_pcm_runtime *fe; 2699 int ret = 0; 2700 2701 snd_soc_dpcm_mutex_lock(card); 2702 /* shutdown all old paths first */ 2703 for_each_card_rtds(card, fe) { 2704 ret = soc_dpcm_fe_runtime_update(fe, 0); 2705 if (ret) 2706 goto out; 2707 } 2708 2709 /* bring new paths up */ 2710 for_each_card_rtds(card, fe) { 2711 ret = soc_dpcm_fe_runtime_update(fe, 1); 2712 if (ret) 2713 goto out; 2714 } 2715 2716 out: 2717 snd_soc_dpcm_mutex_unlock(card); 2718 2719 return snd_soc_ret(card->dev, ret, "%s() failed\n", __func__); 2720 } 2721 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2722 2723 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2724 { 2725 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2726 struct snd_soc_dpcm *dpcm; 2727 int stream = fe_substream->stream; 2728 2729 snd_soc_dpcm_mutex_assert_held(fe); 2730 2731 /* mark FE's links ready to prune */ 2732 for_each_dpcm_be(fe, stream, dpcm) 2733 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2734 2735 dpcm_be_disconnect(fe, stream); 2736 } 2737 2738 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2739 { 2740 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2741 int ret; 2742 2743 snd_soc_dpcm_mutex_lock(fe); 2744 ret = dpcm_fe_dai_shutdown(fe_substream); 2745 2746 dpcm_fe_dai_cleanup(fe_substream); 2747 2748 snd_soc_dpcm_mutex_unlock(fe); 2749 return ret; 2750 } 2751 2752 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2753 { 2754 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream); 2755 struct snd_soc_dapm_widget_list *list; 2756 int ret; 2757 int stream = fe_substream->stream; 2758 2759 snd_soc_dpcm_mutex_lock(fe); 2760 2761 ret = dpcm_path_get(fe, stream, &list); 2762 if (ret < 0) 2763 goto open_end; 2764 2765 /* calculate valid and active FE <-> BE dpcms */ 2766 dpcm_add_paths(fe, stream, &list); 2767 2768 /* There is no point starting up this FE if there are no BEs. */ 2769 if (list_empty(&fe->dpcm[stream].be_clients)) { 2770 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles. */ 2771 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n", 2772 fe->dai_link->name); 2773 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n", fe->dai_link->name); 2774 2775 ret = -EINVAL; 2776 goto put_path; 2777 } 2778 2779 ret = dpcm_fe_dai_startup(fe_substream); 2780 if (ret < 0) 2781 dpcm_fe_dai_cleanup(fe_substream); 2782 2783 dpcm_clear_pending_state(fe, stream); 2784 put_path: 2785 dpcm_path_put(&list); 2786 open_end: 2787 snd_soc_dpcm_mutex_unlock(fe); 2788 return ret; 2789 } 2790 2791 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2792 int *playback, int *capture) 2793 { 2794 struct snd_soc_dai_link *dai_link = rtd->dai_link; 2795 struct snd_soc_dai *cpu_dai; 2796 struct snd_soc_dai *codec_dai; 2797 struct snd_soc_dai_link_ch_map *ch_maps; 2798 struct snd_soc_dai *dummy_dai = snd_soc_find_dai(&snd_soc_dummy_dlc); 2799 int cpu_capture; 2800 int cpu_playback; 2801 int has_playback = 0; 2802 int has_capture = 0; 2803 int i; 2804 2805 if (dai_link->dynamic && dai_link->num_cpus > 1) 2806 return snd_soc_ret(rtd->dev, -EINVAL, 2807 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2808 2809 /* Adapt stream for codec2codec links */ 2810 cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE); 2811 cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK); 2812 2813 /* 2814 * see 2815 * soc.h :: [dai_link->ch_maps Image sample] 2816 */ 2817 for_each_rtd_ch_maps(rtd, i, ch_maps) { 2818 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu); 2819 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec); 2820 2821 /* 2822 * FIXME 2823 * 2824 * DPCM Codec has been no checked before. 2825 * It should be checked, but it breaks compatibility. 2826 * 2827 * For example there is a case that CPU have loopback capabilities which is used 2828 * for tests on boards where the Codec has no capture capabilities. In this case, 2829 * Codec capture validation check will be fail, but system should allow capture 2830 * capabilities. We have no solution for it today. 2831 */ 2832 if (dai_link->dynamic || dai_link->no_pcm) 2833 codec_dai = dummy_dai; 2834 2835 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2836 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2837 has_playback = 1; 2838 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2839 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2840 has_capture = 1; 2841 } 2842 2843 if (dai_link->playback_only) 2844 has_capture = 0; 2845 2846 if (dai_link->capture_only) 2847 has_playback = 0; 2848 2849 if (!has_playback && !has_capture) 2850 return snd_soc_ret(rtd->dev, -EINVAL, 2851 "substream %s has no playback, no capture\n", dai_link->stream_name); 2852 2853 *playback = has_playback; 2854 *capture = has_capture; 2855 2856 return 0; 2857 } 2858 2859 static int soc_create_pcm(struct snd_pcm **pcm, 2860 struct snd_soc_pcm_runtime *rtd, 2861 int playback, int capture) 2862 { 2863 char new_name[64]; 2864 int ret; 2865 2866 /* create the PCM */ 2867 if (rtd->dai_link->c2c_params) { 2868 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2869 rtd->dai_link->stream_name); 2870 2871 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 2872 playback, capture, pcm); 2873 } else if (rtd->dai_link->no_pcm) { 2874 snprintf(new_name, sizeof(new_name), "(%s)", 2875 rtd->dai_link->stream_name); 2876 2877 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id, 2878 playback, capture, pcm); 2879 } else { 2880 if (rtd->dai_link->dynamic) 2881 snprintf(new_name, sizeof(new_name), "%s (*)", 2882 rtd->dai_link->stream_name); 2883 else 2884 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2885 rtd->dai_link->stream_name, 2886 soc_codec_dai_name(rtd), rtd->id); 2887 2888 ret = snd_pcm_new(rtd->card->snd_card, new_name, rtd->id, playback, 2889 capture, pcm); 2890 } 2891 if (ret < 0) 2892 return snd_soc_ret(rtd->dev, ret, 2893 "can't create pcm %s for dailink %s\n", new_name, rtd->dai_link->name); 2894 2895 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n", rtd->id, new_name); 2896 2897 return 0; 2898 } 2899 2900 /* create a new pcm */ 2901 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd) 2902 { 2903 struct snd_soc_component *component; 2904 struct snd_pcm *pcm; 2905 int ret = 0, playback = 0, capture = 0; 2906 int i; 2907 2908 ret = soc_get_playback_capture(rtd, &playback, &capture); 2909 if (ret < 0) 2910 return ret; 2911 2912 ret = soc_create_pcm(&pcm, rtd, playback, capture); 2913 if (ret < 0) 2914 return ret; 2915 2916 /* DAPM dai link stream work */ 2917 /* 2918 * Currently nothing to do for c2c links 2919 * Since c2c links are internal nodes in the DAPM graph and 2920 * don't interface with the outside world or application layer 2921 * we don't have to do any special handling on close. 2922 */ 2923 if (!rtd->dai_link->c2c_params) 2924 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2925 2926 rtd->pcm = pcm; 2927 pcm->nonatomic = rtd->dai_link->nonatomic; 2928 pcm->private_data = rtd; 2929 pcm->no_device_suspend = true; 2930 2931 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) { 2932 if (playback) 2933 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2934 if (capture) 2935 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2936 goto out; 2937 } 2938 2939 /* ASoC PCM operations */ 2940 if (rtd->dai_link->dynamic) { 2941 rtd->ops.open = dpcm_fe_dai_open; 2942 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2943 rtd->ops.prepare = dpcm_fe_dai_prepare; 2944 rtd->ops.trigger = dpcm_fe_dai_trigger; 2945 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2946 rtd->ops.close = dpcm_fe_dai_close; 2947 rtd->ops.pointer = soc_pcm_pointer; 2948 } else { 2949 rtd->ops.open = soc_pcm_open; 2950 rtd->ops.hw_params = soc_pcm_hw_params; 2951 rtd->ops.prepare = soc_pcm_prepare; 2952 rtd->ops.trigger = soc_pcm_trigger; 2953 rtd->ops.hw_free = soc_pcm_hw_free; 2954 rtd->ops.close = soc_pcm_close; 2955 rtd->ops.pointer = soc_pcm_pointer; 2956 } 2957 2958 for_each_rtd_components(rtd, i, component) { 2959 const struct snd_soc_component_driver *drv = component->driver; 2960 2961 if (drv->ioctl) 2962 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2963 if (drv->sync_stop) 2964 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2965 if (drv->copy) 2966 rtd->ops.copy = snd_soc_pcm_component_copy; 2967 if (drv->page) 2968 rtd->ops.page = snd_soc_pcm_component_page; 2969 if (drv->mmap) 2970 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2971 if (drv->ack) 2972 rtd->ops.ack = snd_soc_pcm_component_ack; 2973 } 2974 2975 if (playback) 2976 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2977 2978 if (capture) 2979 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2980 2981 ret = snd_soc_pcm_component_new(rtd); 2982 if (ret < 0) 2983 return ret; 2984 out: 2985 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2986 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2987 return ret; 2988 } 2989 2990 /* get the substream for this BE */ 2991 struct snd_pcm_substream * 2992 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2993 { 2994 return be->pcm->streams[stream].substream; 2995 } 2996 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2997