1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/soc-link.h> 28 #include <sound/initval.h> 29 30 #define DPCM_MAX_BE_USERS 8 31 32 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 33 { 34 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 35 } 36 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 37 { 38 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 39 } 40 41 #ifdef CONFIG_DEBUG_FS 42 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 43 { 44 switch (state) { 45 case SND_SOC_DPCM_STATE_NEW: 46 return "new"; 47 case SND_SOC_DPCM_STATE_OPEN: 48 return "open"; 49 case SND_SOC_DPCM_STATE_HW_PARAMS: 50 return "hw_params"; 51 case SND_SOC_DPCM_STATE_PREPARE: 52 return "prepare"; 53 case SND_SOC_DPCM_STATE_START: 54 return "start"; 55 case SND_SOC_DPCM_STATE_STOP: 56 return "stop"; 57 case SND_SOC_DPCM_STATE_SUSPEND: 58 return "suspend"; 59 case SND_SOC_DPCM_STATE_PAUSED: 60 return "paused"; 61 case SND_SOC_DPCM_STATE_HW_FREE: 62 return "hw_free"; 63 case SND_SOC_DPCM_STATE_CLOSE: 64 return "close"; 65 } 66 67 return "unknown"; 68 } 69 70 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 71 int stream, char *buf, size_t size) 72 { 73 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 74 struct snd_soc_dpcm *dpcm; 75 ssize_t offset = 0; 76 unsigned long flags; 77 78 /* FE state */ 79 offset += scnprintf(buf + offset, size - offset, 80 "[%s - %s]\n", fe->dai_link->name, 81 stream ? "Capture" : "Playback"); 82 83 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 84 dpcm_state_string(fe->dpcm[stream].state)); 85 86 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 87 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 88 offset += scnprintf(buf + offset, size - offset, 89 "Hardware Params: " 90 "Format = %s, Channels = %d, Rate = %d\n", 91 snd_pcm_format_name(params_format(params)), 92 params_channels(params), 93 params_rate(params)); 94 95 /* BEs state */ 96 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 97 98 if (list_empty(&fe->dpcm[stream].be_clients)) { 99 offset += scnprintf(buf + offset, size - offset, 100 " No active DSP links\n"); 101 goto out; 102 } 103 104 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 105 for_each_dpcm_be(fe, stream, dpcm) { 106 struct snd_soc_pcm_runtime *be = dpcm->be; 107 params = &dpcm->hw_params; 108 109 offset += scnprintf(buf + offset, size - offset, 110 "- %s\n", be->dai_link->name); 111 112 offset += scnprintf(buf + offset, size - offset, 113 " State: %s\n", 114 dpcm_state_string(be->dpcm[stream].state)); 115 116 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 117 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 118 offset += scnprintf(buf + offset, size - offset, 119 " Hardware Params: " 120 "Format = %s, Channels = %d, Rate = %d\n", 121 snd_pcm_format_name(params_format(params)), 122 params_channels(params), 123 params_rate(params)); 124 } 125 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 126 out: 127 return offset; 128 } 129 130 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 131 size_t count, loff_t *ppos) 132 { 133 struct snd_soc_pcm_runtime *fe = file->private_data; 134 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 135 int stream; 136 char *buf; 137 138 if (fe->num_cpus > 1) { 139 dev_err(fe->dev, 140 "%s doesn't support Multi CPU yet\n", __func__); 141 return -EINVAL; 142 } 143 144 buf = kmalloc(out_count, GFP_KERNEL); 145 if (!buf) 146 return -ENOMEM; 147 148 for_each_pcm_streams(stream) 149 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 150 offset += dpcm_show_state(fe, stream, 151 buf + offset, 152 out_count - offset); 153 154 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 155 156 kfree(buf); 157 return ret; 158 } 159 160 static const struct file_operations dpcm_state_fops = { 161 .open = simple_open, 162 .read = dpcm_state_read_file, 163 .llseek = default_llseek, 164 }; 165 166 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 167 { 168 if (!rtd->dai_link->dynamic) 169 return; 170 171 if (!rtd->card->debugfs_card_root) 172 return; 173 174 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 175 rtd->card->debugfs_card_root); 176 177 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 178 rtd, &dpcm_state_fops); 179 } 180 181 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 182 { 183 char *name; 184 185 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 186 stream ? "capture" : "playback"); 187 if (name) { 188 dpcm->debugfs_state = debugfs_create_dir( 189 name, dpcm->fe->debugfs_dpcm_root); 190 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 191 &dpcm->state); 192 kfree(name); 193 } 194 } 195 196 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 197 { 198 debugfs_remove_recursive(dpcm->debugfs_state); 199 } 200 201 #else 202 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 203 int stream) 204 { 205 } 206 207 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 208 { 209 } 210 #endif 211 212 /* Set FE's runtime_update state; the state is protected via PCM stream lock 213 * for avoiding the race with trigger callback. 214 * If the state is unset and a trigger is pending while the previous operation, 215 * process the pending trigger action here. 216 */ 217 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 218 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 219 int stream, enum snd_soc_dpcm_update state) 220 { 221 struct snd_pcm_substream *substream = 222 snd_soc_dpcm_get_substream(fe, stream); 223 224 snd_pcm_stream_lock_irq(substream); 225 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 226 dpcm_fe_dai_do_trigger(substream, 227 fe->dpcm[stream].trigger_pending - 1); 228 fe->dpcm[stream].trigger_pending = 0; 229 } 230 fe->dpcm[stream].runtime_update = state; 231 snd_pcm_stream_unlock_irq(substream); 232 } 233 234 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 235 int stream, enum snd_soc_dpcm_update state) 236 { 237 be->dpcm[stream].runtime_update = state; 238 } 239 240 /** 241 * snd_soc_runtime_action() - Increment/Decrement active count for 242 * PCM runtime components 243 * @rtd: ASoC PCM runtime that is activated 244 * @stream: Direction of the PCM stream 245 * @action: Activate stream if 1. Deactivate if -1. 246 * 247 * Increments/Decrements the active count for all the DAIs and components 248 * attached to a PCM runtime. 249 * Should typically be called when a stream is opened. 250 * 251 * Must be called with the rtd->card->pcm_mutex being held 252 */ 253 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 254 int stream, int action) 255 { 256 struct snd_soc_dai *dai; 257 int i; 258 259 lockdep_assert_held(&rtd->card->pcm_mutex); 260 261 for_each_rtd_dais(rtd, i, dai) 262 snd_soc_dai_action(dai, stream, action); 263 } 264 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 265 266 /** 267 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 268 * @rtd: The ASoC PCM runtime that should be checked. 269 * 270 * This function checks whether the power down delay should be ignored for a 271 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 272 * been configured to ignore the delay, or if none of the components benefits 273 * from having the delay. 274 */ 275 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 276 { 277 struct snd_soc_component *component; 278 bool ignore = true; 279 int i; 280 281 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 282 return true; 283 284 for_each_rtd_components(rtd, i, component) 285 ignore &= !component->driver->use_pmdown_time; 286 287 return ignore; 288 } 289 290 /** 291 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 292 * @substream: the pcm substream 293 * @hw: the hardware parameters 294 * 295 * Sets the substream runtime hardware parameters. 296 */ 297 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 298 const struct snd_pcm_hardware *hw) 299 { 300 substream->runtime->hw = *hw; 301 302 return 0; 303 } 304 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 305 306 /* DPCM stream event, send event to FE and all active BEs. */ 307 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 308 int event) 309 { 310 struct snd_soc_dpcm *dpcm; 311 312 for_each_dpcm_be(fe, dir, dpcm) { 313 314 struct snd_soc_pcm_runtime *be = dpcm->be; 315 316 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 317 be->dai_link->name, event, dir); 318 319 if ((event == SND_SOC_DAPM_STREAM_STOP) && 320 (be->dpcm[dir].users >= 1)) 321 continue; 322 323 snd_soc_dapm_stream_event(be, dir, event); 324 } 325 326 snd_soc_dapm_stream_event(fe, dir, event); 327 328 return 0; 329 } 330 331 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 332 struct snd_pcm_hw_params *params) 333 { 334 if (params) { 335 dai->rate = params_rate(params); 336 dai->channels = params_channels(params); 337 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 338 } else { 339 dai->rate = 0; 340 dai->channels = 0; 341 dai->sample_bits = 0; 342 } 343 } 344 345 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 346 struct snd_soc_dai *soc_dai) 347 { 348 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 349 int ret; 350 351 if (!snd_soc_dai_active(soc_dai)) 352 return 0; 353 354 #define __soc_pcm_apply_symmetry(name, NAME) \ 355 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 356 rtd->dai_link->symmetric_##name)) { \ 357 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 358 #name, soc_dai->name); \ 359 \ 360 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 361 SNDRV_PCM_HW_PARAM_##NAME,\ 362 soc_dai->name); \ 363 if (ret < 0) { \ 364 dev_err(soc_dai->dev, \ 365 "ASoC: Unable to apply %s constraint: %d\n",\ 366 #name, ret); \ 367 return ret; \ 368 } \ 369 } 370 371 __soc_pcm_apply_symmetry(rate, RATE); 372 __soc_pcm_apply_symmetry(channels, CHANNELS); 373 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 374 375 return 0; 376 } 377 378 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 379 struct snd_pcm_hw_params *params) 380 { 381 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 382 struct snd_soc_dai d; 383 struct snd_soc_dai *dai; 384 struct snd_soc_dai *cpu_dai; 385 unsigned int symmetry, i; 386 387 d.name = __func__; 388 soc_pcm_set_dai_params(&d, params); 389 390 #define __soc_pcm_params_symmetry(xxx) \ 391 symmetry = rtd->dai_link->symmetric_##xxx; \ 392 for_each_rtd_dais(rtd, i, dai) \ 393 symmetry |= dai->driver->symmetric_##xxx; \ 394 \ 395 if (symmetry) \ 396 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 397 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 398 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 399 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 400 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 401 return -EINVAL; \ 402 } 403 404 /* reject unmatched parameters when applying symmetry */ 405 __soc_pcm_params_symmetry(rate); 406 __soc_pcm_params_symmetry(channels); 407 __soc_pcm_params_symmetry(sample_bits); 408 409 return 0; 410 } 411 412 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 413 { 414 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 415 struct snd_soc_dai_link *link = rtd->dai_link; 416 struct snd_soc_dai *dai; 417 unsigned int symmetry, i; 418 419 symmetry = link->symmetric_rate || 420 link->symmetric_channels || 421 link->symmetric_sample_bits; 422 423 for_each_rtd_dais(rtd, i, dai) 424 symmetry = symmetry || 425 dai->driver->symmetric_rate || 426 dai->driver->symmetric_channels || 427 dai->driver->symmetric_sample_bits; 428 429 if (symmetry) 430 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 431 } 432 433 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 434 { 435 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 436 int ret; 437 438 if (!bits) 439 return; 440 441 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 442 if (ret != 0) 443 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 444 bits, ret); 445 } 446 447 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 448 { 449 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 450 struct snd_soc_dai *cpu_dai; 451 struct snd_soc_dai *codec_dai; 452 int stream = substream->stream; 453 int i; 454 unsigned int bits = 0, cpu_bits = 0; 455 456 for_each_rtd_codec_dais(rtd, i, codec_dai) { 457 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 458 459 if (pcm_codec->sig_bits == 0) { 460 bits = 0; 461 break; 462 } 463 bits = max(pcm_codec->sig_bits, bits); 464 } 465 466 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 467 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 468 469 if (pcm_cpu->sig_bits == 0) { 470 cpu_bits = 0; 471 break; 472 } 473 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 474 } 475 476 soc_pcm_set_msb(substream, bits); 477 soc_pcm_set_msb(substream, cpu_bits); 478 } 479 480 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 481 { 482 hw->rates = UINT_MAX; 483 hw->rate_min = 0; 484 hw->rate_max = UINT_MAX; 485 hw->channels_min = 0; 486 hw->channels_max = UINT_MAX; 487 hw->formats = ULLONG_MAX; 488 } 489 490 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 491 struct snd_soc_pcm_stream *p) 492 { 493 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 494 495 /* setup hw->rate_min/max via hw->rates first */ 496 snd_pcm_hw_limit_rates(hw); 497 498 /* update hw->rate_min/max by snd_soc_pcm_stream */ 499 hw->rate_min = max(hw->rate_min, p->rate_min); 500 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 501 } 502 503 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 504 struct snd_soc_pcm_stream *p) 505 { 506 hw->channels_min = max(hw->channels_min, p->channels_min); 507 hw->channels_max = min(hw->channels_max, p->channels_max); 508 } 509 510 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 511 struct snd_soc_pcm_stream *p) 512 { 513 hw->formats &= p->formats; 514 } 515 516 /** 517 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 518 * @rtd: ASoC PCM runtime 519 * @hw: PCM hardware parameters (output) 520 * @stream: Direction of the PCM stream 521 * 522 * Calculates the subset of stream parameters supported by all DAIs 523 * associated with the PCM stream. 524 */ 525 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 526 struct snd_pcm_hardware *hw, int stream) 527 { 528 struct snd_soc_dai *codec_dai; 529 struct snd_soc_dai *cpu_dai; 530 struct snd_soc_pcm_stream *codec_stream; 531 struct snd_soc_pcm_stream *cpu_stream; 532 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 533 int i; 534 535 soc_pcm_hw_init(hw); 536 537 /* first calculate min/max only for CPUs in the DAI link */ 538 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 539 540 /* 541 * Skip CPUs which don't support the current stream type. 542 * Otherwise, since the rate, channel, and format values will 543 * zero in that case, we would have no usable settings left, 544 * causing the resulting setup to fail. 545 */ 546 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 547 continue; 548 549 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 550 551 soc_pcm_hw_update_chan(hw, cpu_stream); 552 soc_pcm_hw_update_rate(hw, cpu_stream); 553 soc_pcm_hw_update_format(hw, cpu_stream); 554 } 555 cpu_chan_min = hw->channels_min; 556 cpu_chan_max = hw->channels_max; 557 558 /* second calculate min/max only for CODECs in the DAI link */ 559 for_each_rtd_codec_dais(rtd, i, codec_dai) { 560 561 /* 562 * Skip CODECs which don't support the current stream type. 563 * Otherwise, since the rate, channel, and format values will 564 * zero in that case, we would have no usable settings left, 565 * causing the resulting setup to fail. 566 */ 567 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 568 continue; 569 570 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 571 572 soc_pcm_hw_update_chan(hw, codec_stream); 573 soc_pcm_hw_update_rate(hw, codec_stream); 574 soc_pcm_hw_update_format(hw, codec_stream); 575 } 576 577 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 578 if (!hw->channels_min) 579 return -EINVAL; 580 581 /* 582 * chan min/max cannot be enforced if there are multiple CODEC DAIs 583 * connected to CPU DAI(s), use CPU DAI's directly and let 584 * channel allocation be fixed up later 585 */ 586 if (rtd->num_codecs > 1) { 587 hw->channels_min = cpu_chan_min; 588 hw->channels_max = cpu_chan_max; 589 } 590 591 return 0; 592 } 593 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 594 595 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 596 { 597 struct snd_pcm_hardware *hw = &substream->runtime->hw; 598 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 599 u64 formats = hw->formats; 600 601 /* 602 * At least one CPU and one CODEC should match. Otherwise, we should 603 * have bailed out on a higher level, since there would be no CPU or 604 * CODEC to support the transfer direction in that case. 605 */ 606 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 607 608 if (formats) 609 hw->formats &= formats; 610 } 611 612 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 613 { 614 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 615 struct snd_soc_component *component; 616 int i, ret = 0; 617 618 for_each_rtd_components(rtd, i, component) { 619 ret = snd_soc_component_module_get_when_open(component, substream); 620 if (ret < 0) 621 break; 622 623 ret = snd_soc_component_open(component, substream); 624 if (ret < 0) 625 break; 626 } 627 628 return ret; 629 } 630 631 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 632 int rollback) 633 { 634 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 635 struct snd_soc_component *component; 636 int i, ret = 0; 637 638 for_each_rtd_components(rtd, i, component) { 639 int r = snd_soc_component_close(component, substream, rollback); 640 if (r < 0) 641 ret = r; /* use last ret */ 642 643 snd_soc_component_module_put_when_close(component, substream, rollback); 644 } 645 646 return ret; 647 } 648 649 static int soc_pcm_clean(struct snd_pcm_substream *substream, int rollback) 650 { 651 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 652 struct snd_soc_component *component; 653 struct snd_soc_dai *dai; 654 int i; 655 656 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 657 658 if (!rollback) 659 snd_soc_runtime_deactivate(rtd, substream->stream); 660 661 for_each_rtd_dais(rtd, i, dai) 662 snd_soc_dai_shutdown(dai, substream, rollback); 663 664 snd_soc_link_shutdown(substream, rollback); 665 666 soc_pcm_components_close(substream, rollback); 667 668 669 mutex_unlock(&rtd->card->pcm_mutex); 670 671 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 672 673 for_each_rtd_components(rtd, i, component) 674 if (!snd_soc_component_active(component)) 675 pinctrl_pm_select_sleep_state(component->dev); 676 677 return 0; 678 } 679 680 /* 681 * Called by ALSA when a PCM substream is closed. Private data can be 682 * freed here. The cpu DAI, codec DAI, machine and components are also 683 * shutdown. 684 */ 685 static int soc_pcm_close(struct snd_pcm_substream *substream) 686 { 687 return soc_pcm_clean(substream, 0); 688 } 689 690 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 691 { 692 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 693 struct snd_pcm_hardware *hw = &substream->runtime->hw; 694 const char *name_cpu = soc_cpu_dai_name(rtd); 695 const char *name_codec = soc_codec_dai_name(rtd); 696 const char *err_msg; 697 struct device *dev = rtd->dev; 698 699 err_msg = "rates"; 700 if (!hw->rates) 701 goto config_err; 702 703 err_msg = "formats"; 704 if (!hw->formats) 705 goto config_err; 706 707 err_msg = "channels"; 708 if (!hw->channels_min || !hw->channels_max || 709 hw->channels_min > hw->channels_max) 710 goto config_err; 711 712 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 713 name_cpu); 714 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 715 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 716 hw->channels_max); 717 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 718 hw->rate_max); 719 720 return 0; 721 722 config_err: 723 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 724 name_codec, name_cpu, err_msg); 725 return -EINVAL; 726 } 727 728 /* 729 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 730 * then initialized and any private data can be allocated. This also calls 731 * startup for the cpu DAI, component, machine and codec DAI. 732 */ 733 static int soc_pcm_open(struct snd_pcm_substream *substream) 734 { 735 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 736 struct snd_soc_component *component; 737 struct snd_soc_dai *dai; 738 int i, ret = 0; 739 740 for_each_rtd_components(rtd, i, component) 741 pinctrl_pm_select_default_state(component->dev); 742 743 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 744 if (ret < 0) 745 goto pm_err; 746 747 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 748 749 ret = soc_pcm_components_open(substream); 750 if (ret < 0) 751 goto err; 752 753 ret = snd_soc_link_startup(substream); 754 if (ret < 0) 755 goto err; 756 757 /* startup the audio subsystem */ 758 for_each_rtd_dais(rtd, i, dai) { 759 ret = snd_soc_dai_startup(dai, substream); 760 if (ret < 0) 761 goto err; 762 763 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 764 dai->tx_mask = 0; 765 else 766 dai->rx_mask = 0; 767 } 768 769 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 770 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 771 goto dynamic; 772 773 /* Check that the codec and cpu DAIs are compatible */ 774 soc_pcm_init_runtime_hw(substream); 775 776 soc_pcm_update_symmetry(substream); 777 778 ret = soc_hw_sanity_check(substream); 779 if (ret < 0) 780 goto err; 781 782 soc_pcm_apply_msb(substream); 783 784 /* Symmetry only applies if we've already got an active stream. */ 785 for_each_rtd_dais(rtd, i, dai) { 786 ret = soc_pcm_apply_symmetry(substream, dai); 787 if (ret != 0) 788 goto err; 789 } 790 dynamic: 791 snd_soc_runtime_activate(rtd, substream->stream); 792 ret = 0; 793 err: 794 mutex_unlock(&rtd->card->pcm_mutex); 795 pm_err: 796 if (ret < 0) { 797 soc_pcm_clean(substream, 1); 798 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret); 799 } 800 801 return ret; 802 } 803 804 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 805 { 806 /* 807 * Currently nothing to do for c2c links 808 * Since c2c links are internal nodes in the DAPM graph and 809 * don't interface with the outside world or application layer 810 * we don't have to do any special handling on close. 811 */ 812 } 813 814 /* 815 * Called by ALSA when the PCM substream is prepared, can set format, sample 816 * rate, etc. This function is non atomic and can be called multiple times, 817 * it can refer to the runtime info. 818 */ 819 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 820 { 821 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 822 struct snd_soc_dai *dai; 823 int i, ret = 0; 824 825 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 826 827 ret = snd_soc_link_prepare(substream); 828 if (ret < 0) 829 goto out; 830 831 ret = snd_soc_pcm_component_prepare(substream); 832 if (ret < 0) 833 goto out; 834 835 ret = snd_soc_pcm_dai_prepare(substream); 836 if (ret < 0) 837 goto out; 838 839 /* cancel any delayed stream shutdown that is pending */ 840 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 841 rtd->pop_wait) { 842 rtd->pop_wait = 0; 843 cancel_delayed_work(&rtd->delayed_work); 844 } 845 846 snd_soc_dapm_stream_event(rtd, substream->stream, 847 SND_SOC_DAPM_STREAM_START); 848 849 for_each_rtd_dais(rtd, i, dai) 850 snd_soc_dai_digital_mute(dai, 0, substream->stream); 851 852 out: 853 mutex_unlock(&rtd->card->pcm_mutex); 854 855 if (ret < 0) 856 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 857 858 return ret; 859 } 860 861 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 862 unsigned int mask) 863 { 864 struct snd_interval *interval; 865 int channels = hweight_long(mask); 866 867 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 868 interval->min = channels; 869 interval->max = channels; 870 } 871 872 static int soc_pcm_hw_clean(struct snd_pcm_substream *substream, int rollback) 873 { 874 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 875 struct snd_soc_dai *dai; 876 int i; 877 878 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 879 880 /* clear the corresponding DAIs parameters when going to be inactive */ 881 for_each_rtd_dais(rtd, i, dai) { 882 int active = snd_soc_dai_stream_active(dai, substream->stream); 883 884 if (snd_soc_dai_active(dai) == 1) 885 soc_pcm_set_dai_params(dai, NULL); 886 887 if (active == 1) 888 snd_soc_dai_digital_mute(dai, 1, substream->stream); 889 } 890 891 /* run the stream event */ 892 snd_soc_dapm_stream_stop(rtd, substream->stream); 893 894 /* free any machine hw params */ 895 snd_soc_link_hw_free(substream, rollback); 896 897 /* free any component resources */ 898 snd_soc_pcm_component_hw_free(substream, rollback); 899 900 /* now free hw params for the DAIs */ 901 for_each_rtd_dais(rtd, i, dai) { 902 if (!snd_soc_dai_stream_valid(dai, substream->stream)) 903 continue; 904 905 snd_soc_dai_hw_free(dai, substream, rollback); 906 } 907 908 mutex_unlock(&rtd->card->pcm_mutex); 909 return 0; 910 } 911 912 /* 913 * Frees resources allocated by hw_params, can be called multiple times 914 */ 915 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 916 { 917 return soc_pcm_hw_clean(substream, 0); 918 } 919 920 /* 921 * Called by ALSA when the hardware params are set by application. This 922 * function can also be called multiple times and can allocate buffers 923 * (using snd_pcm_lib_* ). It's non-atomic. 924 */ 925 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 926 struct snd_pcm_hw_params *params) 927 { 928 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 929 struct snd_soc_dai *cpu_dai; 930 struct snd_soc_dai *codec_dai; 931 int i, ret = 0; 932 933 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 934 935 ret = soc_pcm_params_symmetry(substream, params); 936 if (ret) 937 goto out; 938 939 ret = snd_soc_link_hw_params(substream, params); 940 if (ret < 0) 941 goto out; 942 943 for_each_rtd_codec_dais(rtd, i, codec_dai) { 944 struct snd_pcm_hw_params codec_params; 945 946 /* 947 * Skip CODECs which don't support the current stream type, 948 * the idea being that if a CODEC is not used for the currently 949 * set up transfer direction, it should not need to be 950 * configured, especially since the configuration used might 951 * not even be supported by that CODEC. There may be cases 952 * however where a CODEC needs to be set up although it is 953 * actually not being used for the transfer, e.g. if a 954 * capture-only CODEC is acting as an LRCLK and/or BCLK master 955 * for the DAI link including a playback-only CODEC. 956 * If this becomes necessary, we will have to augment the 957 * machine driver setup with information on how to act, so 958 * we can do the right thing here. 959 */ 960 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 961 continue; 962 963 /* copy params for each codec */ 964 codec_params = *params; 965 966 /* fixup params based on TDM slot masks */ 967 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 968 codec_dai->tx_mask) 969 soc_pcm_codec_params_fixup(&codec_params, 970 codec_dai->tx_mask); 971 972 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 973 codec_dai->rx_mask) 974 soc_pcm_codec_params_fixup(&codec_params, 975 codec_dai->rx_mask); 976 977 ret = snd_soc_dai_hw_params(codec_dai, substream, 978 &codec_params); 979 if(ret < 0) 980 goto out; 981 982 soc_pcm_set_dai_params(codec_dai, &codec_params); 983 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 984 } 985 986 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 987 /* 988 * Skip CPUs which don't support the current stream 989 * type. See soc_pcm_init_runtime_hw() for more details 990 */ 991 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 992 continue; 993 994 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 995 if (ret < 0) 996 goto out; 997 998 /* store the parameters for each DAI */ 999 soc_pcm_set_dai_params(cpu_dai, params); 1000 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1001 } 1002 1003 ret = snd_soc_pcm_component_hw_params(substream, params); 1004 out: 1005 mutex_unlock(&rtd->card->pcm_mutex); 1006 1007 if (ret < 0) { 1008 soc_pcm_hw_clean(substream, 1); 1009 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 1010 } 1011 1012 return ret; 1013 } 1014 1015 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1016 { 1017 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1018 int ret = -EINVAL, _ret = 0; 1019 int rollback = 0; 1020 1021 switch (cmd) { 1022 case SNDRV_PCM_TRIGGER_START: 1023 case SNDRV_PCM_TRIGGER_RESUME: 1024 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1025 ret = snd_soc_link_trigger(substream, cmd, 0); 1026 if (ret < 0) 1027 goto start_err; 1028 1029 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1030 if (ret < 0) 1031 goto start_err; 1032 1033 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1034 start_err: 1035 if (ret < 0) 1036 rollback = 1; 1037 } 1038 1039 if (rollback) { 1040 _ret = ret; 1041 switch (cmd) { 1042 case SNDRV_PCM_TRIGGER_START: 1043 cmd = SNDRV_PCM_TRIGGER_STOP; 1044 break; 1045 case SNDRV_PCM_TRIGGER_RESUME: 1046 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1047 break; 1048 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1049 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1050 break; 1051 } 1052 } 1053 1054 switch (cmd) { 1055 case SNDRV_PCM_TRIGGER_STOP: 1056 case SNDRV_PCM_TRIGGER_SUSPEND: 1057 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1058 if (rtd->dai_link->stop_dma_first) { 1059 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1060 if (ret < 0) 1061 break; 1062 1063 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1064 if (ret < 0) 1065 break; 1066 } else { 1067 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1068 if (ret < 0) 1069 break; 1070 1071 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1072 if (ret < 0) 1073 break; 1074 } 1075 ret = snd_soc_link_trigger(substream, cmd, rollback); 1076 break; 1077 } 1078 1079 if (_ret) 1080 ret = _ret; 1081 1082 return ret; 1083 } 1084 1085 /* 1086 * soc level wrapper for pointer callback 1087 * If cpu_dai, codec_dai, component driver has the delay callback, then 1088 * the runtime->delay will be updated accordingly. 1089 */ 1090 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1091 { 1092 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1093 struct snd_soc_dai *cpu_dai; 1094 struct snd_soc_dai *codec_dai; 1095 struct snd_pcm_runtime *runtime = substream->runtime; 1096 snd_pcm_uframes_t offset = 0; 1097 snd_pcm_sframes_t delay = 0; 1098 snd_pcm_sframes_t codec_delay = 0; 1099 snd_pcm_sframes_t cpu_delay = 0; 1100 int i; 1101 1102 /* clearing the previous total delay */ 1103 runtime->delay = 0; 1104 1105 offset = snd_soc_pcm_component_pointer(substream); 1106 1107 /* base delay if assigned in pointer callback */ 1108 delay = runtime->delay; 1109 1110 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1111 cpu_delay = max(cpu_delay, 1112 snd_soc_dai_delay(cpu_dai, substream)); 1113 } 1114 delay += cpu_delay; 1115 1116 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1117 codec_delay = max(codec_delay, 1118 snd_soc_dai_delay(codec_dai, substream)); 1119 } 1120 delay += codec_delay; 1121 1122 runtime->delay = delay; 1123 1124 return offset; 1125 } 1126 1127 /* connect a FE and BE */ 1128 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1129 struct snd_soc_pcm_runtime *be, int stream) 1130 { 1131 struct snd_soc_dpcm *dpcm; 1132 unsigned long flags; 1133 1134 /* only add new dpcms */ 1135 for_each_dpcm_be(fe, stream, dpcm) { 1136 if (dpcm->be == be && dpcm->fe == fe) 1137 return 0; 1138 } 1139 1140 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1141 if (!dpcm) 1142 return -ENOMEM; 1143 1144 dpcm->be = be; 1145 dpcm->fe = fe; 1146 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1147 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1148 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1149 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1150 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1151 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1152 1153 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1154 stream ? "capture" : "playback", fe->dai_link->name, 1155 stream ? "<-" : "->", be->dai_link->name); 1156 1157 dpcm_create_debugfs_state(dpcm, stream); 1158 1159 return 1; 1160 } 1161 1162 /* reparent a BE onto another FE */ 1163 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1164 struct snd_soc_pcm_runtime *be, int stream) 1165 { 1166 struct snd_soc_dpcm *dpcm; 1167 struct snd_pcm_substream *fe_substream, *be_substream; 1168 1169 /* reparent if BE is connected to other FEs */ 1170 if (!be->dpcm[stream].users) 1171 return; 1172 1173 be_substream = snd_soc_dpcm_get_substream(be, stream); 1174 1175 for_each_dpcm_fe(be, stream, dpcm) { 1176 if (dpcm->fe == fe) 1177 continue; 1178 1179 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1180 stream ? "capture" : "playback", 1181 dpcm->fe->dai_link->name, 1182 stream ? "<-" : "->", dpcm->be->dai_link->name); 1183 1184 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1185 be_substream->runtime = fe_substream->runtime; 1186 break; 1187 } 1188 } 1189 1190 /* disconnect a BE and FE */ 1191 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1192 { 1193 struct snd_soc_dpcm *dpcm, *d; 1194 unsigned long flags; 1195 1196 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1197 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1198 stream ? "capture" : "playback", 1199 dpcm->be->dai_link->name); 1200 1201 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1202 continue; 1203 1204 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1205 stream ? "capture" : "playback", fe->dai_link->name, 1206 stream ? "<-" : "->", dpcm->be->dai_link->name); 1207 1208 /* BEs still alive need new FE */ 1209 dpcm_be_reparent(fe, dpcm->be, stream); 1210 1211 dpcm_remove_debugfs_state(dpcm); 1212 1213 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1214 list_del(&dpcm->list_be); 1215 list_del(&dpcm->list_fe); 1216 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1217 kfree(dpcm); 1218 } 1219 } 1220 1221 /* get BE for DAI widget and stream */ 1222 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1223 struct snd_soc_dapm_widget *widget, int stream) 1224 { 1225 struct snd_soc_pcm_runtime *be; 1226 struct snd_soc_dapm_widget *w; 1227 struct snd_soc_dai *dai; 1228 int i; 1229 1230 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1231 1232 for_each_card_rtds(card, be) { 1233 1234 if (!be->dai_link->no_pcm) 1235 continue; 1236 1237 for_each_rtd_dais(be, i, dai) { 1238 w = snd_soc_dai_get_widget(dai, stream); 1239 1240 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1241 w ? w->name : "(not set)"); 1242 1243 if (w == widget) 1244 return be; 1245 } 1246 } 1247 1248 /* Widget provided is not a BE */ 1249 return NULL; 1250 } 1251 1252 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1253 struct snd_soc_dapm_widget *widget) 1254 { 1255 struct snd_soc_dapm_widget *w; 1256 int i; 1257 1258 for_each_dapm_widgets(list, i, w) 1259 if (widget == w) 1260 return 1; 1261 1262 return 0; 1263 } 1264 1265 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1266 { 1267 struct snd_soc_card *card = widget->dapm->card; 1268 struct snd_soc_pcm_runtime *rtd; 1269 int stream; 1270 1271 /* adjust dir to stream */ 1272 if (dir == SND_SOC_DAPM_DIR_OUT) 1273 stream = SNDRV_PCM_STREAM_PLAYBACK; 1274 else 1275 stream = SNDRV_PCM_STREAM_CAPTURE; 1276 1277 rtd = dpcm_get_be(card, widget, stream); 1278 if (rtd) 1279 return true; 1280 1281 return false; 1282 } 1283 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1284 1285 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1286 int stream, struct snd_soc_dapm_widget_list **list) 1287 { 1288 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1289 int paths; 1290 1291 if (fe->num_cpus > 1) { 1292 dev_err(fe->dev, 1293 "%s doesn't support Multi CPU yet\n", __func__); 1294 return -EINVAL; 1295 } 1296 1297 /* get number of valid DAI paths and their widgets */ 1298 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1299 fe->card->component_chaining ? 1300 NULL : dpcm_end_walk_at_be); 1301 1302 if (paths > 0) 1303 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1304 stream ? "capture" : "playback"); 1305 else if (paths == 0) 1306 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1307 stream ? "capture" : "playback"); 1308 1309 return paths; 1310 } 1311 1312 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1313 { 1314 snd_soc_dapm_dai_free_widgets(list); 1315 } 1316 1317 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1318 struct snd_soc_dapm_widget_list *list) 1319 { 1320 struct snd_soc_dai *dai; 1321 unsigned int i; 1322 1323 /* is there a valid DAI widget for this BE */ 1324 for_each_rtd_dais(dpcm->be, i, dai) { 1325 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1326 1327 /* 1328 * The BE is pruned only if none of the dai 1329 * widgets are in the active list. 1330 */ 1331 if (widget && widget_in_list(list, widget)) 1332 return true; 1333 } 1334 1335 return false; 1336 } 1337 1338 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1339 struct snd_soc_dapm_widget_list **list_) 1340 { 1341 struct snd_soc_dpcm *dpcm; 1342 int prune = 0; 1343 1344 /* Destroy any old FE <--> BE connections */ 1345 for_each_dpcm_be(fe, stream, dpcm) { 1346 if (dpcm_be_is_active(dpcm, stream, *list_)) 1347 continue; 1348 1349 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1350 stream ? "capture" : "playback", 1351 dpcm->be->dai_link->name, fe->dai_link->name); 1352 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1353 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1354 prune++; 1355 } 1356 1357 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1358 return prune; 1359 } 1360 1361 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1362 struct snd_soc_dapm_widget_list **list_) 1363 { 1364 struct snd_soc_card *card = fe->card; 1365 struct snd_soc_dapm_widget_list *list = *list_; 1366 struct snd_soc_pcm_runtime *be; 1367 struct snd_soc_dapm_widget *widget; 1368 int i, new = 0, err; 1369 1370 /* Create any new FE <--> BE connections */ 1371 for_each_dapm_widgets(list, i, widget) { 1372 1373 switch (widget->id) { 1374 case snd_soc_dapm_dai_in: 1375 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1376 continue; 1377 break; 1378 case snd_soc_dapm_dai_out: 1379 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1380 continue; 1381 break; 1382 default: 1383 continue; 1384 } 1385 1386 /* is there a valid BE rtd for this widget */ 1387 be = dpcm_get_be(card, widget, stream); 1388 if (!be) { 1389 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1390 widget->name); 1391 continue; 1392 } 1393 1394 /* don't connect if FE is not running */ 1395 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1396 continue; 1397 1398 /* 1399 * Filter for systems with 'component_chaining' enabled. 1400 * This helps to avoid unnecessary re-configuration of an 1401 * already active BE on such systems. 1402 */ 1403 if (fe->card->component_chaining && 1404 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1405 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1406 continue; 1407 1408 /* newly connected FE and BE */ 1409 err = dpcm_be_connect(fe, be, stream); 1410 if (err < 0) { 1411 dev_err(fe->dev, "ASoC: can't connect %s\n", 1412 widget->name); 1413 break; 1414 } else if (err == 0) /* already connected */ 1415 continue; 1416 1417 /* new */ 1418 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1419 new++; 1420 } 1421 1422 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1423 return new; 1424 } 1425 1426 /* 1427 * Find the corresponding BE DAIs that source or sink audio to this 1428 * FE substream. 1429 */ 1430 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1431 int stream, struct snd_soc_dapm_widget_list **list, int new) 1432 { 1433 if (new) 1434 return dpcm_add_paths(fe, stream, list); 1435 else 1436 return dpcm_prune_paths(fe, stream, list); 1437 } 1438 1439 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1440 { 1441 struct snd_soc_dpcm *dpcm; 1442 unsigned long flags; 1443 1444 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1445 for_each_dpcm_be(fe, stream, dpcm) 1446 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1447 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1448 } 1449 1450 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1451 int do_hw_free, struct snd_soc_dpcm *last) 1452 { 1453 struct snd_soc_dpcm *dpcm; 1454 1455 /* disable any enabled and non active backends */ 1456 for_each_dpcm_be(fe, stream, dpcm) { 1457 struct snd_soc_pcm_runtime *be = dpcm->be; 1458 struct snd_pcm_substream *be_substream = 1459 snd_soc_dpcm_get_substream(be, stream); 1460 1461 if (dpcm == last) 1462 return; 1463 1464 /* is this op for this BE ? */ 1465 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1466 continue; 1467 1468 if (be->dpcm[stream].users == 0) { 1469 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1470 stream ? "capture" : "playback", 1471 be->dpcm[stream].state); 1472 continue; 1473 } 1474 1475 if (--be->dpcm[stream].users != 0) 1476 continue; 1477 1478 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1479 if (!do_hw_free) 1480 continue; 1481 1482 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1483 soc_pcm_hw_free(be_substream); 1484 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1485 } 1486 } 1487 1488 soc_pcm_close(be_substream); 1489 be_substream->runtime = NULL; 1490 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1491 } 1492 } 1493 1494 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1495 { 1496 struct snd_soc_pcm_runtime *be; 1497 struct snd_soc_dpcm *dpcm; 1498 int err, count = 0; 1499 1500 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1501 for_each_dpcm_be(fe, stream, dpcm) { 1502 struct snd_pcm_substream *be_substream; 1503 1504 be = dpcm->be; 1505 be_substream = snd_soc_dpcm_get_substream(be, stream); 1506 1507 if (!be_substream) { 1508 dev_err(be->dev, "ASoC: no backend %s stream\n", 1509 stream ? "capture" : "playback"); 1510 continue; 1511 } 1512 1513 /* is this op for this BE ? */ 1514 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1515 continue; 1516 1517 /* first time the dpcm is open ? */ 1518 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1519 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1520 stream ? "capture" : "playback", 1521 be->dpcm[stream].state); 1522 continue; 1523 } 1524 1525 if (be->dpcm[stream].users++ != 0) 1526 continue; 1527 1528 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1529 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1530 continue; 1531 1532 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1533 stream ? "capture" : "playback", be->dai_link->name); 1534 1535 be_substream->runtime = be->dpcm[stream].runtime; 1536 err = soc_pcm_open(be_substream); 1537 if (err < 0) { 1538 be->dpcm[stream].users--; 1539 if (be->dpcm[stream].users < 0) 1540 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1541 stream ? "capture" : "playback", 1542 be->dpcm[stream].state); 1543 1544 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1545 goto unwind; 1546 } 1547 1548 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1549 count++; 1550 } 1551 1552 return count; 1553 1554 unwind: 1555 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1556 1557 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1558 __func__, be->dai_link->name, err); 1559 1560 return err; 1561 } 1562 1563 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1564 { 1565 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1566 struct snd_pcm_runtime *runtime = substream->runtime; 1567 struct snd_pcm_hardware *hw = &runtime->hw; 1568 struct snd_soc_dai *dai; 1569 int stream = substream->stream; 1570 int i; 1571 1572 soc_pcm_hw_init(hw); 1573 1574 for_each_rtd_cpu_dais(fe, i, dai) { 1575 struct snd_soc_pcm_stream *cpu_stream; 1576 1577 /* 1578 * Skip CPUs which don't support the current stream 1579 * type. See soc_pcm_init_runtime_hw() for more details 1580 */ 1581 if (!snd_soc_dai_stream_valid(dai, stream)) 1582 continue; 1583 1584 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1585 1586 soc_pcm_hw_update_rate(hw, cpu_stream); 1587 soc_pcm_hw_update_chan(hw, cpu_stream); 1588 soc_pcm_hw_update_format(hw, cpu_stream); 1589 } 1590 1591 } 1592 1593 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1594 { 1595 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1596 struct snd_pcm_runtime *runtime = substream->runtime; 1597 struct snd_pcm_hardware *hw = &runtime->hw; 1598 struct snd_soc_dpcm *dpcm; 1599 struct snd_soc_dai *dai; 1600 int stream = substream->stream; 1601 1602 if (!fe->dai_link->dpcm_merged_format) 1603 return; 1604 1605 /* 1606 * It returns merged BE codec format 1607 * if FE want to use it (= dpcm_merged_format) 1608 */ 1609 1610 for_each_dpcm_be(fe, stream, dpcm) { 1611 struct snd_soc_pcm_runtime *be = dpcm->be; 1612 struct snd_soc_pcm_stream *codec_stream; 1613 int i; 1614 1615 for_each_rtd_codec_dais(be, i, dai) { 1616 /* 1617 * Skip CODECs which don't support the current stream 1618 * type. See soc_pcm_init_runtime_hw() for more details 1619 */ 1620 if (!snd_soc_dai_stream_valid(dai, stream)) 1621 continue; 1622 1623 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1624 1625 soc_pcm_hw_update_format(hw, codec_stream); 1626 } 1627 } 1628 } 1629 1630 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1631 { 1632 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1633 struct snd_pcm_runtime *runtime = substream->runtime; 1634 struct snd_pcm_hardware *hw = &runtime->hw; 1635 struct snd_soc_dpcm *dpcm; 1636 int stream = substream->stream; 1637 1638 if (!fe->dai_link->dpcm_merged_chan) 1639 return; 1640 1641 /* 1642 * It returns merged BE codec channel; 1643 * if FE want to use it (= dpcm_merged_chan) 1644 */ 1645 1646 for_each_dpcm_be(fe, stream, dpcm) { 1647 struct snd_soc_pcm_runtime *be = dpcm->be; 1648 struct snd_soc_pcm_stream *cpu_stream; 1649 struct snd_soc_dai *dai; 1650 int i; 1651 1652 for_each_rtd_cpu_dais(be, i, dai) { 1653 /* 1654 * Skip CPUs which don't support the current stream 1655 * type. See soc_pcm_init_runtime_hw() for more details 1656 */ 1657 if (!snd_soc_dai_stream_valid(dai, stream)) 1658 continue; 1659 1660 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1661 1662 soc_pcm_hw_update_chan(hw, cpu_stream); 1663 } 1664 1665 /* 1666 * chan min/max cannot be enforced if there are multiple CODEC 1667 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1668 */ 1669 if (be->num_codecs == 1) { 1670 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1671 asoc_rtd_to_codec(be, 0), stream); 1672 1673 soc_pcm_hw_update_chan(hw, codec_stream); 1674 } 1675 } 1676 } 1677 1678 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1679 { 1680 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1681 struct snd_pcm_runtime *runtime = substream->runtime; 1682 struct snd_pcm_hardware *hw = &runtime->hw; 1683 struct snd_soc_dpcm *dpcm; 1684 int stream = substream->stream; 1685 1686 if (!fe->dai_link->dpcm_merged_rate) 1687 return; 1688 1689 /* 1690 * It returns merged BE codec channel; 1691 * if FE want to use it (= dpcm_merged_chan) 1692 */ 1693 1694 for_each_dpcm_be(fe, stream, dpcm) { 1695 struct snd_soc_pcm_runtime *be = dpcm->be; 1696 struct snd_soc_pcm_stream *pcm; 1697 struct snd_soc_dai *dai; 1698 int i; 1699 1700 for_each_rtd_dais(be, i, dai) { 1701 /* 1702 * Skip DAIs which don't support the current stream 1703 * type. See soc_pcm_init_runtime_hw() for more details 1704 */ 1705 if (!snd_soc_dai_stream_valid(dai, stream)) 1706 continue; 1707 1708 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1709 1710 soc_pcm_hw_update_rate(hw, pcm); 1711 } 1712 } 1713 } 1714 1715 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1716 int stream) 1717 { 1718 struct snd_soc_dpcm *dpcm; 1719 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1720 struct snd_soc_dai *fe_cpu_dai; 1721 int err = 0; 1722 int i; 1723 1724 /* apply symmetry for FE */ 1725 soc_pcm_update_symmetry(fe_substream); 1726 1727 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1728 /* Symmetry only applies if we've got an active stream. */ 1729 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1730 if (err < 0) 1731 goto error; 1732 } 1733 1734 /* apply symmetry for BE */ 1735 for_each_dpcm_be(fe, stream, dpcm) { 1736 struct snd_soc_pcm_runtime *be = dpcm->be; 1737 struct snd_pcm_substream *be_substream = 1738 snd_soc_dpcm_get_substream(be, stream); 1739 struct snd_soc_pcm_runtime *rtd; 1740 struct snd_soc_dai *dai; 1741 1742 /* A backend may not have the requested substream */ 1743 if (!be_substream) 1744 continue; 1745 1746 rtd = asoc_substream_to_rtd(be_substream); 1747 if (rtd->dai_link->be_hw_params_fixup) 1748 continue; 1749 1750 soc_pcm_update_symmetry(be_substream); 1751 1752 /* Symmetry only applies if we've got an active stream. */ 1753 for_each_rtd_dais(rtd, i, dai) { 1754 err = soc_pcm_apply_symmetry(fe_substream, dai); 1755 if (err < 0) 1756 goto error; 1757 } 1758 } 1759 error: 1760 if (err < 0) 1761 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err); 1762 1763 return err; 1764 } 1765 1766 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1767 { 1768 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1769 int stream = fe_substream->stream, ret = 0; 1770 1771 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1772 1773 ret = dpcm_be_dai_startup(fe, stream); 1774 if (ret < 0) 1775 goto be_err; 1776 1777 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1778 1779 /* start the DAI frontend */ 1780 ret = soc_pcm_open(fe_substream); 1781 if (ret < 0) 1782 goto unwind; 1783 1784 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1785 1786 dpcm_runtime_setup_fe(fe_substream); 1787 1788 dpcm_runtime_setup_be_format(fe_substream); 1789 dpcm_runtime_setup_be_chan(fe_substream); 1790 dpcm_runtime_setup_be_rate(fe_substream); 1791 1792 ret = dpcm_apply_symmetry(fe_substream, stream); 1793 1794 unwind: 1795 if (ret < 0) 1796 dpcm_be_dai_startup_unwind(fe, stream); 1797 be_err: 1798 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1799 1800 if (ret < 0) 1801 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret); 1802 1803 return ret; 1804 } 1805 1806 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1807 { 1808 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1809 int stream = substream->stream; 1810 1811 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1812 1813 /* shutdown the BEs */ 1814 dpcm_be_dai_shutdown(fe, stream); 1815 1816 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1817 1818 /* now shutdown the frontend */ 1819 soc_pcm_close(substream); 1820 1821 /* run the stream stop event */ 1822 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1823 1824 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1825 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1826 return 0; 1827 } 1828 1829 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1830 { 1831 struct snd_soc_dpcm *dpcm; 1832 1833 /* only hw_params backends that are either sinks or sources 1834 * to this frontend DAI */ 1835 for_each_dpcm_be(fe, stream, dpcm) { 1836 1837 struct snd_soc_pcm_runtime *be = dpcm->be; 1838 struct snd_pcm_substream *be_substream = 1839 snd_soc_dpcm_get_substream(be, stream); 1840 1841 /* is this op for this BE ? */ 1842 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1843 continue; 1844 1845 /* only free hw when no longer used - check all FEs */ 1846 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1847 continue; 1848 1849 /* do not free hw if this BE is used by other FE */ 1850 if (be->dpcm[stream].users > 1) 1851 continue; 1852 1853 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1854 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1855 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1856 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1857 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1858 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1859 continue; 1860 1861 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1862 be->dai_link->name); 1863 1864 soc_pcm_hw_free(be_substream); 1865 1866 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1867 } 1868 } 1869 1870 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1871 { 1872 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1873 int stream = substream->stream; 1874 1875 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1876 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1877 1878 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1879 1880 /* call hw_free on the frontend */ 1881 soc_pcm_hw_free(substream); 1882 1883 /* only hw_params backends that are either sinks or sources 1884 * to this frontend DAI */ 1885 dpcm_be_dai_hw_free(fe, stream); 1886 1887 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1888 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1889 1890 mutex_unlock(&fe->card->mutex); 1891 return 0; 1892 } 1893 1894 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1895 { 1896 struct snd_soc_pcm_runtime *be; 1897 struct snd_pcm_substream *be_substream; 1898 struct snd_soc_dpcm *dpcm; 1899 int ret; 1900 1901 for_each_dpcm_be(fe, stream, dpcm) { 1902 be = dpcm->be; 1903 be_substream = snd_soc_dpcm_get_substream(be, stream); 1904 1905 /* is this op for this BE ? */ 1906 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1907 continue; 1908 1909 /* copy params for each dpcm */ 1910 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1911 sizeof(struct snd_pcm_hw_params)); 1912 1913 /* perform any hw_params fixups */ 1914 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params); 1915 if (ret < 0) 1916 goto unwind; 1917 1918 /* copy the fixed-up hw params for BE dai */ 1919 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 1920 sizeof(struct snd_pcm_hw_params)); 1921 1922 /* only allow hw_params() if no connected FEs are running */ 1923 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1924 continue; 1925 1926 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1927 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1928 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1929 continue; 1930 1931 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1932 be->dai_link->name); 1933 1934 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1935 if (ret < 0) 1936 goto unwind; 1937 1938 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1939 } 1940 return 0; 1941 1942 unwind: 1943 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1944 __func__, be->dai_link->name, ret); 1945 1946 /* disable any enabled and non active backends */ 1947 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1948 be = dpcm->be; 1949 be_substream = snd_soc_dpcm_get_substream(be, stream); 1950 1951 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1952 continue; 1953 1954 /* only allow hw_free() if no connected FEs are running */ 1955 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1956 continue; 1957 1958 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1959 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1960 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1961 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1962 continue; 1963 1964 soc_pcm_hw_free(be_substream); 1965 } 1966 1967 return ret; 1968 } 1969 1970 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1971 struct snd_pcm_hw_params *params) 1972 { 1973 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1974 int ret, stream = substream->stream; 1975 1976 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1977 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1978 1979 memcpy(&fe->dpcm[stream].hw_params, params, 1980 sizeof(struct snd_pcm_hw_params)); 1981 ret = dpcm_be_dai_hw_params(fe, stream); 1982 if (ret < 0) 1983 goto out; 1984 1985 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1986 fe->dai_link->name, params_rate(params), 1987 params_channels(params), params_format(params)); 1988 1989 /* call hw_params on the frontend */ 1990 ret = soc_pcm_hw_params(substream, params); 1991 if (ret < 0) 1992 dpcm_be_dai_hw_free(fe, stream); 1993 else 1994 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1995 1996 out: 1997 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1998 mutex_unlock(&fe->card->mutex); 1999 2000 if (ret < 0) 2001 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret); 2002 2003 return ret; 2004 } 2005 2006 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2007 int cmd) 2008 { 2009 struct snd_soc_pcm_runtime *be; 2010 struct snd_soc_dpcm *dpcm; 2011 int ret = 0; 2012 2013 for_each_dpcm_be(fe, stream, dpcm) { 2014 struct snd_pcm_substream *be_substream; 2015 2016 be = dpcm->be; 2017 be_substream = snd_soc_dpcm_get_substream(be, stream); 2018 2019 /* is this op for this BE ? */ 2020 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2021 continue; 2022 2023 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2024 be->dai_link->name, cmd); 2025 2026 switch (cmd) { 2027 case SNDRV_PCM_TRIGGER_START: 2028 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2029 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2030 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2031 continue; 2032 2033 ret = soc_pcm_trigger(be_substream, cmd); 2034 if (ret) 2035 goto end; 2036 2037 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2038 break; 2039 case SNDRV_PCM_TRIGGER_RESUME: 2040 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2041 continue; 2042 2043 ret = soc_pcm_trigger(be_substream, cmd); 2044 if (ret) 2045 goto end; 2046 2047 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2048 break; 2049 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2050 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2051 continue; 2052 2053 ret = soc_pcm_trigger(be_substream, cmd); 2054 if (ret) 2055 goto end; 2056 2057 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2058 break; 2059 case SNDRV_PCM_TRIGGER_STOP: 2060 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2061 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2062 continue; 2063 2064 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2065 continue; 2066 2067 ret = soc_pcm_trigger(be_substream, cmd); 2068 if (ret) 2069 goto end; 2070 2071 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2072 break; 2073 case SNDRV_PCM_TRIGGER_SUSPEND: 2074 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2075 continue; 2076 2077 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2078 continue; 2079 2080 ret = soc_pcm_trigger(be_substream, cmd); 2081 if (ret) 2082 goto end; 2083 2084 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2085 break; 2086 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2087 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2088 continue; 2089 2090 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2091 continue; 2092 2093 ret = soc_pcm_trigger(be_substream, cmd); 2094 if (ret) 2095 goto end; 2096 2097 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2098 break; 2099 } 2100 } 2101 end: 2102 if (ret < 0) 2103 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2104 __func__, be->dai_link->name, ret); 2105 return ret; 2106 } 2107 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2108 2109 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2110 int cmd, bool fe_first) 2111 { 2112 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2113 int ret; 2114 2115 /* call trigger on the frontend before the backend. */ 2116 if (fe_first) { 2117 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2118 fe->dai_link->name, cmd); 2119 2120 ret = soc_pcm_trigger(substream, cmd); 2121 if (ret < 0) 2122 return ret; 2123 2124 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2125 return ret; 2126 } 2127 2128 /* call trigger on the frontend after the backend. */ 2129 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2130 if (ret < 0) 2131 return ret; 2132 2133 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2134 fe->dai_link->name, cmd); 2135 2136 ret = soc_pcm_trigger(substream, cmd); 2137 2138 return ret; 2139 } 2140 2141 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2142 { 2143 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2144 int stream = substream->stream; 2145 int ret = 0; 2146 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2147 2148 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2149 2150 switch (trigger) { 2151 case SND_SOC_DPCM_TRIGGER_PRE: 2152 switch (cmd) { 2153 case SNDRV_PCM_TRIGGER_START: 2154 case SNDRV_PCM_TRIGGER_RESUME: 2155 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2156 case SNDRV_PCM_TRIGGER_DRAIN: 2157 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2158 break; 2159 case SNDRV_PCM_TRIGGER_STOP: 2160 case SNDRV_PCM_TRIGGER_SUSPEND: 2161 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2162 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2163 break; 2164 default: 2165 ret = -EINVAL; 2166 break; 2167 } 2168 break; 2169 case SND_SOC_DPCM_TRIGGER_POST: 2170 switch (cmd) { 2171 case SNDRV_PCM_TRIGGER_START: 2172 case SNDRV_PCM_TRIGGER_RESUME: 2173 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2174 case SNDRV_PCM_TRIGGER_DRAIN: 2175 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2176 break; 2177 case SNDRV_PCM_TRIGGER_STOP: 2178 case SNDRV_PCM_TRIGGER_SUSPEND: 2179 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2180 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2181 break; 2182 default: 2183 ret = -EINVAL; 2184 break; 2185 } 2186 break; 2187 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2188 /* bespoke trigger() - handles both FE and BEs */ 2189 2190 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2191 fe->dai_link->name, cmd); 2192 2193 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2194 break; 2195 default: 2196 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2197 fe->dai_link->name); 2198 ret = -EINVAL; 2199 goto out; 2200 } 2201 2202 if (ret < 0) { 2203 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2204 cmd, ret); 2205 goto out; 2206 } 2207 2208 switch (cmd) { 2209 case SNDRV_PCM_TRIGGER_START: 2210 case SNDRV_PCM_TRIGGER_RESUME: 2211 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2212 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2213 break; 2214 case SNDRV_PCM_TRIGGER_STOP: 2215 case SNDRV_PCM_TRIGGER_SUSPEND: 2216 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2217 break; 2218 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2219 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2220 break; 2221 } 2222 2223 out: 2224 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2225 return ret; 2226 } 2227 2228 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2229 { 2230 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2231 int stream = substream->stream; 2232 2233 /* if FE's runtime_update is already set, we're in race; 2234 * process this trigger later at exit 2235 */ 2236 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2237 fe->dpcm[stream].trigger_pending = cmd + 1; 2238 return 0; /* delayed, assuming it's successful */ 2239 } 2240 2241 /* we're alone, let's trigger */ 2242 return dpcm_fe_dai_do_trigger(substream, cmd); 2243 } 2244 2245 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2246 { 2247 struct snd_soc_dpcm *dpcm; 2248 int ret = 0; 2249 2250 for_each_dpcm_be(fe, stream, dpcm) { 2251 2252 struct snd_soc_pcm_runtime *be = dpcm->be; 2253 struct snd_pcm_substream *be_substream = 2254 snd_soc_dpcm_get_substream(be, stream); 2255 2256 /* is this op for this BE ? */ 2257 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2258 continue; 2259 2260 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2261 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2262 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2263 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2264 continue; 2265 2266 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2267 be->dai_link->name); 2268 2269 ret = soc_pcm_prepare(be_substream); 2270 if (ret < 0) 2271 break; 2272 2273 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2274 } 2275 2276 if (ret < 0) 2277 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2278 2279 return ret; 2280 } 2281 2282 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2283 { 2284 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2285 int stream = substream->stream, ret = 0; 2286 2287 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2288 2289 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2290 2291 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2292 2293 /* there is no point preparing this FE if there are no BEs */ 2294 if (list_empty(&fe->dpcm[stream].be_clients)) { 2295 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2296 fe->dai_link->name); 2297 ret = -EINVAL; 2298 goto out; 2299 } 2300 2301 ret = dpcm_be_dai_prepare(fe, stream); 2302 if (ret < 0) 2303 goto out; 2304 2305 /* call prepare on the frontend */ 2306 ret = soc_pcm_prepare(substream); 2307 if (ret < 0) 2308 goto out; 2309 2310 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2311 2312 out: 2313 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2314 mutex_unlock(&fe->card->mutex); 2315 2316 if (ret < 0) 2317 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2318 2319 return ret; 2320 } 2321 2322 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2323 { 2324 struct snd_pcm_substream *substream = 2325 snd_soc_dpcm_get_substream(fe, stream); 2326 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2327 int err; 2328 2329 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2330 stream ? "capture" : "playback", fe->dai_link->name); 2331 2332 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2333 /* call bespoke trigger - FE takes care of all BE triggers */ 2334 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2335 fe->dai_link->name); 2336 2337 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2338 } else { 2339 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2340 fe->dai_link->name); 2341 2342 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2343 } 2344 2345 dpcm_be_dai_hw_free(fe, stream); 2346 2347 dpcm_be_dai_shutdown(fe, stream); 2348 2349 /* run the stream event for each BE */ 2350 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2351 2352 if (err < 0) 2353 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err); 2354 2355 return err; 2356 } 2357 2358 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2359 { 2360 struct snd_pcm_substream *substream = 2361 snd_soc_dpcm_get_substream(fe, stream); 2362 struct snd_soc_dpcm *dpcm; 2363 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2364 int ret = 0; 2365 unsigned long flags; 2366 2367 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2368 stream ? "capture" : "playback", fe->dai_link->name); 2369 2370 /* Only start the BE if the FE is ready */ 2371 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2372 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2373 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2374 fe->dai_link->name, fe->dpcm[stream].state); 2375 ret = -EINVAL; 2376 goto disconnect; 2377 } 2378 2379 /* startup must always be called for new BEs */ 2380 ret = dpcm_be_dai_startup(fe, stream); 2381 if (ret < 0) 2382 goto disconnect; 2383 2384 /* keep going if FE state is > open */ 2385 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2386 return 0; 2387 2388 ret = dpcm_be_dai_hw_params(fe, stream); 2389 if (ret < 0) 2390 goto close; 2391 2392 /* keep going if FE state is > hw_params */ 2393 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2394 return 0; 2395 2396 ret = dpcm_be_dai_prepare(fe, stream); 2397 if (ret < 0) 2398 goto hw_free; 2399 2400 /* run the stream event for each BE */ 2401 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2402 2403 /* keep going if FE state is > prepare */ 2404 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2405 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2406 return 0; 2407 2408 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2409 /* call trigger on the frontend - FE takes care of all BE triggers */ 2410 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2411 fe->dai_link->name); 2412 2413 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2414 if (ret < 0) 2415 goto hw_free; 2416 } else { 2417 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2418 fe->dai_link->name); 2419 2420 ret = dpcm_be_dai_trigger(fe, stream, 2421 SNDRV_PCM_TRIGGER_START); 2422 if (ret < 0) 2423 goto hw_free; 2424 } 2425 2426 return 0; 2427 2428 hw_free: 2429 dpcm_be_dai_hw_free(fe, stream); 2430 close: 2431 dpcm_be_dai_shutdown(fe, stream); 2432 disconnect: 2433 /* disconnect any pending BEs */ 2434 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2435 for_each_dpcm_be(fe, stream, dpcm) { 2436 struct snd_soc_pcm_runtime *be = dpcm->be; 2437 2438 /* is this op for this BE ? */ 2439 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2440 continue; 2441 2442 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2443 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2444 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2445 } 2446 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2447 2448 if (ret < 0) 2449 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2450 2451 return ret; 2452 } 2453 2454 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2455 { 2456 struct snd_soc_dapm_widget_list *list; 2457 int stream; 2458 int count, paths; 2459 2460 if (!fe->dai_link->dynamic) 2461 return 0; 2462 2463 if (fe->num_cpus > 1) { 2464 dev_err(fe->dev, 2465 "%s doesn't support Multi CPU yet\n", __func__); 2466 return -EINVAL; 2467 } 2468 2469 /* only check active links */ 2470 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2471 return 0; 2472 2473 /* DAPM sync will call this to update DSP paths */ 2474 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2475 new ? "new" : "old", fe->dai_link->name); 2476 2477 for_each_pcm_streams(stream) { 2478 2479 /* skip if FE doesn't have playback/capture capability */ 2480 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2481 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2482 continue; 2483 2484 /* skip if FE isn't currently playing/capturing */ 2485 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2486 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2487 continue; 2488 2489 paths = dpcm_path_get(fe, stream, &list); 2490 if (paths < 0) 2491 return paths; 2492 2493 /* update any playback/capture paths */ 2494 count = dpcm_process_paths(fe, stream, &list, new); 2495 if (count) { 2496 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2497 if (new) 2498 dpcm_run_update_startup(fe, stream); 2499 else 2500 dpcm_run_update_shutdown(fe, stream); 2501 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2502 2503 dpcm_clear_pending_state(fe, stream); 2504 dpcm_be_disconnect(fe, stream); 2505 } 2506 2507 dpcm_path_put(&list); 2508 } 2509 2510 return 0; 2511 } 2512 2513 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2514 * any DAI links. 2515 */ 2516 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2517 { 2518 struct snd_soc_pcm_runtime *fe; 2519 int ret = 0; 2520 2521 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2522 /* shutdown all old paths first */ 2523 for_each_card_rtds(card, fe) { 2524 ret = soc_dpcm_fe_runtime_update(fe, 0); 2525 if (ret) 2526 goto out; 2527 } 2528 2529 /* bring new paths up */ 2530 for_each_card_rtds(card, fe) { 2531 ret = soc_dpcm_fe_runtime_update(fe, 1); 2532 if (ret) 2533 goto out; 2534 } 2535 2536 out: 2537 mutex_unlock(&card->mutex); 2538 return ret; 2539 } 2540 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2541 2542 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2543 { 2544 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2545 struct snd_soc_dpcm *dpcm; 2546 int stream = fe_substream->stream; 2547 2548 /* mark FE's links ready to prune */ 2549 for_each_dpcm_be(fe, stream, dpcm) 2550 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2551 2552 dpcm_be_disconnect(fe, stream); 2553 2554 fe->dpcm[stream].runtime = NULL; 2555 } 2556 2557 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2558 { 2559 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2560 int ret; 2561 2562 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2563 ret = dpcm_fe_dai_shutdown(fe_substream); 2564 2565 dpcm_fe_dai_cleanup(fe_substream); 2566 2567 mutex_unlock(&fe->card->mutex); 2568 return ret; 2569 } 2570 2571 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2572 { 2573 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2574 struct snd_soc_dapm_widget_list *list; 2575 int ret; 2576 int stream = fe_substream->stream; 2577 2578 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2579 fe->dpcm[stream].runtime = fe_substream->runtime; 2580 2581 ret = dpcm_path_get(fe, stream, &list); 2582 if (ret < 0) 2583 goto open_end; 2584 2585 /* calculate valid and active FE <-> BE dpcms */ 2586 dpcm_process_paths(fe, stream, &list, 1); 2587 2588 ret = dpcm_fe_dai_startup(fe_substream); 2589 if (ret < 0) 2590 dpcm_fe_dai_cleanup(fe_substream); 2591 2592 dpcm_clear_pending_state(fe, stream); 2593 dpcm_path_put(&list); 2594 open_end: 2595 mutex_unlock(&fe->card->mutex); 2596 return ret; 2597 } 2598 2599 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2600 int *playback, int *capture) 2601 { 2602 struct snd_soc_dai *cpu_dai; 2603 int i; 2604 2605 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) { 2606 dev_err(rtd->dev, 2607 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2608 return -EINVAL; 2609 } 2610 2611 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2612 int stream; 2613 2614 if (rtd->dai_link->dpcm_playback) { 2615 stream = SNDRV_PCM_STREAM_PLAYBACK; 2616 2617 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2618 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2619 *playback = 1; 2620 break; 2621 } 2622 } 2623 if (!*playback) { 2624 dev_err(rtd->card->dev, 2625 "No CPU DAIs support playback for stream %s\n", 2626 rtd->dai_link->stream_name); 2627 return -EINVAL; 2628 } 2629 } 2630 if (rtd->dai_link->dpcm_capture) { 2631 stream = SNDRV_PCM_STREAM_CAPTURE; 2632 2633 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2634 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2635 *capture = 1; 2636 break; 2637 } 2638 } 2639 2640 if (!*capture) { 2641 dev_err(rtd->card->dev, 2642 "No CPU DAIs support capture for stream %s\n", 2643 rtd->dai_link->stream_name); 2644 return -EINVAL; 2645 } 2646 } 2647 } else { 2648 struct snd_soc_dai *codec_dai; 2649 2650 /* Adapt stream for codec2codec links */ 2651 int cpu_capture = rtd->dai_link->params ? 2652 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2653 int cpu_playback = rtd->dai_link->params ? 2654 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2655 2656 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2657 if (rtd->num_cpus == 1) { 2658 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2659 } else if (rtd->num_cpus == rtd->num_codecs) { 2660 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2661 } else { 2662 dev_err(rtd->card->dev, 2663 "N cpus to M codecs link is not supported yet\n"); 2664 return -EINVAL; 2665 } 2666 2667 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2668 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2669 *playback = 1; 2670 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2671 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2672 *capture = 1; 2673 } 2674 } 2675 2676 if (rtd->dai_link->playback_only) { 2677 *playback = 1; 2678 *capture = 0; 2679 } 2680 2681 if (rtd->dai_link->capture_only) { 2682 *playback = 0; 2683 *capture = 1; 2684 } 2685 2686 return 0; 2687 } 2688 2689 static int soc_create_pcm(struct snd_pcm **pcm, 2690 struct snd_soc_pcm_runtime *rtd, 2691 int playback, int capture, int num) 2692 { 2693 char new_name[64]; 2694 int ret; 2695 2696 /* create the PCM */ 2697 if (rtd->dai_link->params) { 2698 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2699 rtd->dai_link->stream_name); 2700 2701 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2702 playback, capture, pcm); 2703 } else if (rtd->dai_link->no_pcm) { 2704 snprintf(new_name, sizeof(new_name), "(%s)", 2705 rtd->dai_link->stream_name); 2706 2707 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2708 playback, capture, pcm); 2709 } else { 2710 if (rtd->dai_link->dynamic) 2711 snprintf(new_name, sizeof(new_name), "%s (*)", 2712 rtd->dai_link->stream_name); 2713 else 2714 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2715 rtd->dai_link->stream_name, 2716 soc_codec_dai_name(rtd), num); 2717 2718 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2719 capture, pcm); 2720 } 2721 if (ret < 0) { 2722 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2723 new_name, rtd->dai_link->name, ret); 2724 return ret; 2725 } 2726 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2727 2728 return 0; 2729 } 2730 2731 /* create a new pcm */ 2732 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2733 { 2734 struct snd_soc_component *component; 2735 struct snd_pcm *pcm; 2736 int ret = 0, playback = 0, capture = 0; 2737 int i; 2738 2739 ret = soc_get_playback_capture(rtd, &playback, &capture); 2740 if (ret < 0) 2741 return ret; 2742 2743 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2744 if (ret < 0) 2745 return ret; 2746 2747 /* DAPM dai link stream work */ 2748 if (rtd->dai_link->params) 2749 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2750 else 2751 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2752 2753 rtd->pcm = pcm; 2754 pcm->nonatomic = rtd->dai_link->nonatomic; 2755 pcm->private_data = rtd; 2756 2757 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2758 if (playback) 2759 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2760 if (capture) 2761 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2762 goto out; 2763 } 2764 2765 /* ASoC PCM operations */ 2766 if (rtd->dai_link->dynamic) { 2767 rtd->ops.open = dpcm_fe_dai_open; 2768 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2769 rtd->ops.prepare = dpcm_fe_dai_prepare; 2770 rtd->ops.trigger = dpcm_fe_dai_trigger; 2771 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2772 rtd->ops.close = dpcm_fe_dai_close; 2773 rtd->ops.pointer = soc_pcm_pointer; 2774 } else { 2775 rtd->ops.open = soc_pcm_open; 2776 rtd->ops.hw_params = soc_pcm_hw_params; 2777 rtd->ops.prepare = soc_pcm_prepare; 2778 rtd->ops.trigger = soc_pcm_trigger; 2779 rtd->ops.hw_free = soc_pcm_hw_free; 2780 rtd->ops.close = soc_pcm_close; 2781 rtd->ops.pointer = soc_pcm_pointer; 2782 } 2783 2784 for_each_rtd_components(rtd, i, component) { 2785 const struct snd_soc_component_driver *drv = component->driver; 2786 2787 if (drv->ioctl) 2788 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2789 if (drv->sync_stop) 2790 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2791 if (drv->copy_user) 2792 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2793 if (drv->page) 2794 rtd->ops.page = snd_soc_pcm_component_page; 2795 if (drv->mmap) 2796 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2797 if (drv->ack) 2798 rtd->ops.ack = snd_soc_pcm_component_ack; 2799 } 2800 2801 if (playback) 2802 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2803 2804 if (capture) 2805 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2806 2807 ret = snd_soc_pcm_component_new(rtd); 2808 if (ret < 0) 2809 return ret; 2810 2811 pcm->no_device_suspend = true; 2812 out: 2813 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2814 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2815 return ret; 2816 } 2817 2818 /* is the current PCM operation for this FE ? */ 2819 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2820 { 2821 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2822 return 1; 2823 return 0; 2824 } 2825 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2826 2827 /* is the current PCM operation for this BE ? */ 2828 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2829 struct snd_soc_pcm_runtime *be, int stream) 2830 { 2831 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2832 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2833 be->dpcm[stream].runtime_update)) 2834 return 1; 2835 return 0; 2836 } 2837 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2838 2839 /* get the substream for this BE */ 2840 struct snd_pcm_substream * 2841 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2842 { 2843 return be->pcm->streams[stream].substream; 2844 } 2845 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2846 2847 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2848 struct snd_soc_pcm_runtime *be, 2849 int stream, 2850 const enum snd_soc_dpcm_state *states, 2851 int num_states) 2852 { 2853 struct snd_soc_dpcm *dpcm; 2854 int state; 2855 int ret = 1; 2856 unsigned long flags; 2857 int i; 2858 2859 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2860 for_each_dpcm_fe(be, stream, dpcm) { 2861 2862 if (dpcm->fe == fe) 2863 continue; 2864 2865 state = dpcm->fe->dpcm[stream].state; 2866 for (i = 0; i < num_states; i++) { 2867 if (state == states[i]) { 2868 ret = 0; 2869 break; 2870 } 2871 } 2872 } 2873 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2874 2875 /* it's safe to do this BE DAI */ 2876 return ret; 2877 } 2878 2879 /* 2880 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2881 * are not running, paused or suspended for the specified stream direction. 2882 */ 2883 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2884 struct snd_soc_pcm_runtime *be, int stream) 2885 { 2886 const enum snd_soc_dpcm_state state[] = { 2887 SND_SOC_DPCM_STATE_START, 2888 SND_SOC_DPCM_STATE_PAUSED, 2889 SND_SOC_DPCM_STATE_SUSPEND, 2890 }; 2891 2892 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2893 } 2894 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2895 2896 /* 2897 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2898 * running, paused or suspended for the specified stream direction. 2899 */ 2900 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2901 struct snd_soc_pcm_runtime *be, int stream) 2902 { 2903 const enum snd_soc_dpcm_state state[] = { 2904 SND_SOC_DPCM_STATE_START, 2905 SND_SOC_DPCM_STATE_PAUSED, 2906 SND_SOC_DPCM_STATE_SUSPEND, 2907 SND_SOC_DPCM_STATE_PREPARE, 2908 }; 2909 2910 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2911 } 2912 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2913