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 if (snd_soc_dai_active(dai) == 1) 883 soc_pcm_set_dai_params(dai, NULL); 884 885 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) 886 snd_soc_dai_digital_mute(dai, 1, substream->stream); 887 } 888 889 /* run the stream event */ 890 snd_soc_dapm_stream_stop(rtd, substream->stream); 891 892 /* free any machine hw params */ 893 snd_soc_link_hw_free(substream, rollback); 894 895 /* free any component resources */ 896 snd_soc_pcm_component_hw_free(substream, rollback); 897 898 /* now free hw params for the DAIs */ 899 for_each_rtd_dais(rtd, i, dai) 900 if (snd_soc_dai_stream_valid(dai, substream->stream)) 901 snd_soc_dai_hw_free(dai, substream, rollback); 902 903 mutex_unlock(&rtd->card->pcm_mutex); 904 return 0; 905 } 906 907 /* 908 * Frees resources allocated by hw_params, can be called multiple times 909 */ 910 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 911 { 912 return soc_pcm_hw_clean(substream, 0); 913 } 914 915 /* 916 * Called by ALSA when the hardware params are set by application. This 917 * function can also be called multiple times and can allocate buffers 918 * (using snd_pcm_lib_* ). It's non-atomic. 919 */ 920 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 921 struct snd_pcm_hw_params *params) 922 { 923 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 924 struct snd_soc_dai *cpu_dai; 925 struct snd_soc_dai *codec_dai; 926 int i, ret = 0; 927 928 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 929 930 ret = soc_pcm_params_symmetry(substream, params); 931 if (ret) 932 goto out; 933 934 ret = snd_soc_link_hw_params(substream, params); 935 if (ret < 0) 936 goto out; 937 938 for_each_rtd_codec_dais(rtd, i, codec_dai) { 939 struct snd_pcm_hw_params codec_params; 940 941 /* 942 * Skip CODECs which don't support the current stream type, 943 * the idea being that if a CODEC is not used for the currently 944 * set up transfer direction, it should not need to be 945 * configured, especially since the configuration used might 946 * not even be supported by that CODEC. There may be cases 947 * however where a CODEC needs to be set up although it is 948 * actually not being used for the transfer, e.g. if a 949 * capture-only CODEC is acting as an LRCLK and/or BCLK master 950 * for the DAI link including a playback-only CODEC. 951 * If this becomes necessary, we will have to augment the 952 * machine driver setup with information on how to act, so 953 * we can do the right thing here. 954 */ 955 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 956 continue; 957 958 /* copy params for each codec */ 959 codec_params = *params; 960 961 /* fixup params based on TDM slot masks */ 962 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 963 codec_dai->tx_mask) 964 soc_pcm_codec_params_fixup(&codec_params, 965 codec_dai->tx_mask); 966 967 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 968 codec_dai->rx_mask) 969 soc_pcm_codec_params_fixup(&codec_params, 970 codec_dai->rx_mask); 971 972 ret = snd_soc_dai_hw_params(codec_dai, substream, 973 &codec_params); 974 if(ret < 0) 975 goto out; 976 977 soc_pcm_set_dai_params(codec_dai, &codec_params); 978 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 979 } 980 981 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 982 /* 983 * Skip CPUs which don't support the current stream 984 * type. See soc_pcm_init_runtime_hw() for more details 985 */ 986 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 987 continue; 988 989 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 990 if (ret < 0) 991 goto out; 992 993 /* store the parameters for each DAI */ 994 soc_pcm_set_dai_params(cpu_dai, params); 995 snd_soc_dapm_update_dai(substream, params, cpu_dai); 996 } 997 998 ret = snd_soc_pcm_component_hw_params(substream, params); 999 out: 1000 mutex_unlock(&rtd->card->pcm_mutex); 1001 1002 if (ret < 0) { 1003 soc_pcm_hw_clean(substream, 1); 1004 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 1005 } 1006 1007 return ret; 1008 } 1009 1010 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1011 { 1012 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1013 int ret = -EINVAL, _ret = 0; 1014 int rollback = 0; 1015 1016 switch (cmd) { 1017 case SNDRV_PCM_TRIGGER_START: 1018 case SNDRV_PCM_TRIGGER_RESUME: 1019 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1020 ret = snd_soc_link_trigger(substream, cmd, 0); 1021 if (ret < 0) 1022 goto start_err; 1023 1024 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1025 if (ret < 0) 1026 goto start_err; 1027 1028 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1029 start_err: 1030 if (ret < 0) 1031 rollback = 1; 1032 } 1033 1034 if (rollback) { 1035 _ret = ret; 1036 switch (cmd) { 1037 case SNDRV_PCM_TRIGGER_START: 1038 cmd = SNDRV_PCM_TRIGGER_STOP; 1039 break; 1040 case SNDRV_PCM_TRIGGER_RESUME: 1041 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1042 break; 1043 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1044 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1045 break; 1046 } 1047 } 1048 1049 switch (cmd) { 1050 case SNDRV_PCM_TRIGGER_STOP: 1051 case SNDRV_PCM_TRIGGER_SUSPEND: 1052 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1053 if (rtd->dai_link->stop_dma_first) { 1054 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1055 if (ret < 0) 1056 break; 1057 1058 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1059 if (ret < 0) 1060 break; 1061 } else { 1062 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1063 if (ret < 0) 1064 break; 1065 1066 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1067 if (ret < 0) 1068 break; 1069 } 1070 ret = snd_soc_link_trigger(substream, cmd, rollback); 1071 break; 1072 } 1073 1074 if (_ret) 1075 ret = _ret; 1076 1077 return ret; 1078 } 1079 1080 /* 1081 * soc level wrapper for pointer callback 1082 * If cpu_dai, codec_dai, component driver has the delay callback, then 1083 * the runtime->delay will be updated accordingly. 1084 */ 1085 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1086 { 1087 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1088 struct snd_soc_dai *cpu_dai; 1089 struct snd_soc_dai *codec_dai; 1090 struct snd_pcm_runtime *runtime = substream->runtime; 1091 snd_pcm_uframes_t offset = 0; 1092 snd_pcm_sframes_t delay = 0; 1093 snd_pcm_sframes_t codec_delay = 0; 1094 snd_pcm_sframes_t cpu_delay = 0; 1095 int i; 1096 1097 /* clearing the previous total delay */ 1098 runtime->delay = 0; 1099 1100 offset = snd_soc_pcm_component_pointer(substream); 1101 1102 /* base delay if assigned in pointer callback */ 1103 delay = runtime->delay; 1104 1105 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1106 cpu_delay = max(cpu_delay, 1107 snd_soc_dai_delay(cpu_dai, substream)); 1108 } 1109 delay += cpu_delay; 1110 1111 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1112 codec_delay = max(codec_delay, 1113 snd_soc_dai_delay(codec_dai, substream)); 1114 } 1115 delay += codec_delay; 1116 1117 runtime->delay = delay; 1118 1119 return offset; 1120 } 1121 1122 /* connect a FE and BE */ 1123 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1124 struct snd_soc_pcm_runtime *be, int stream) 1125 { 1126 struct snd_soc_dpcm *dpcm; 1127 unsigned long flags; 1128 1129 /* only add new dpcms */ 1130 for_each_dpcm_be(fe, stream, dpcm) { 1131 if (dpcm->be == be && dpcm->fe == fe) 1132 return 0; 1133 } 1134 1135 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1136 if (!dpcm) 1137 return -ENOMEM; 1138 1139 dpcm->be = be; 1140 dpcm->fe = fe; 1141 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1142 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1143 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1144 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1145 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1146 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1147 1148 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1149 stream ? "capture" : "playback", fe->dai_link->name, 1150 stream ? "<-" : "->", be->dai_link->name); 1151 1152 dpcm_create_debugfs_state(dpcm, stream); 1153 1154 return 1; 1155 } 1156 1157 /* reparent a BE onto another FE */ 1158 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1159 struct snd_soc_pcm_runtime *be, int stream) 1160 { 1161 struct snd_soc_dpcm *dpcm; 1162 struct snd_pcm_substream *fe_substream, *be_substream; 1163 1164 /* reparent if BE is connected to other FEs */ 1165 if (!be->dpcm[stream].users) 1166 return; 1167 1168 be_substream = snd_soc_dpcm_get_substream(be, stream); 1169 1170 for_each_dpcm_fe(be, stream, dpcm) { 1171 if (dpcm->fe == fe) 1172 continue; 1173 1174 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1175 stream ? "capture" : "playback", 1176 dpcm->fe->dai_link->name, 1177 stream ? "<-" : "->", dpcm->be->dai_link->name); 1178 1179 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1180 be_substream->runtime = fe_substream->runtime; 1181 break; 1182 } 1183 } 1184 1185 /* disconnect a BE and FE */ 1186 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1187 { 1188 struct snd_soc_dpcm *dpcm, *d; 1189 unsigned long flags; 1190 1191 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1192 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1193 stream ? "capture" : "playback", 1194 dpcm->be->dai_link->name); 1195 1196 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1197 continue; 1198 1199 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1200 stream ? "capture" : "playback", fe->dai_link->name, 1201 stream ? "<-" : "->", dpcm->be->dai_link->name); 1202 1203 /* BEs still alive need new FE */ 1204 dpcm_be_reparent(fe, dpcm->be, stream); 1205 1206 dpcm_remove_debugfs_state(dpcm); 1207 1208 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1209 list_del(&dpcm->list_be); 1210 list_del(&dpcm->list_fe); 1211 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1212 kfree(dpcm); 1213 } 1214 } 1215 1216 /* get BE for DAI widget and stream */ 1217 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1218 struct snd_soc_dapm_widget *widget, int stream) 1219 { 1220 struct snd_soc_pcm_runtime *be; 1221 struct snd_soc_dapm_widget *w; 1222 struct snd_soc_dai *dai; 1223 int i; 1224 1225 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1226 1227 for_each_card_rtds(card, be) { 1228 1229 if (!be->dai_link->no_pcm) 1230 continue; 1231 1232 for_each_rtd_dais(be, i, dai) { 1233 w = snd_soc_dai_get_widget(dai, stream); 1234 1235 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1236 w ? w->name : "(not set)"); 1237 1238 if (w == widget) 1239 return be; 1240 } 1241 } 1242 1243 /* Widget provided is not a BE */ 1244 return NULL; 1245 } 1246 1247 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1248 struct snd_soc_dapm_widget *widget) 1249 { 1250 struct snd_soc_dapm_widget *w; 1251 int i; 1252 1253 for_each_dapm_widgets(list, i, w) 1254 if (widget == w) 1255 return 1; 1256 1257 return 0; 1258 } 1259 1260 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1261 { 1262 struct snd_soc_card *card = widget->dapm->card; 1263 struct snd_soc_pcm_runtime *rtd; 1264 int stream; 1265 1266 /* adjust dir to stream */ 1267 if (dir == SND_SOC_DAPM_DIR_OUT) 1268 stream = SNDRV_PCM_STREAM_PLAYBACK; 1269 else 1270 stream = SNDRV_PCM_STREAM_CAPTURE; 1271 1272 rtd = dpcm_get_be(card, widget, stream); 1273 if (rtd) 1274 return true; 1275 1276 return false; 1277 } 1278 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1279 1280 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1281 int stream, struct snd_soc_dapm_widget_list **list) 1282 { 1283 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1284 int paths; 1285 1286 if (fe->num_cpus > 1) { 1287 dev_err(fe->dev, 1288 "%s doesn't support Multi CPU yet\n", __func__); 1289 return -EINVAL; 1290 } 1291 1292 /* get number of valid DAI paths and their widgets */ 1293 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1294 fe->card->component_chaining ? 1295 NULL : dpcm_end_walk_at_be); 1296 1297 if (paths > 0) 1298 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1299 stream ? "capture" : "playback"); 1300 else if (paths == 0) 1301 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1302 stream ? "capture" : "playback"); 1303 1304 return paths; 1305 } 1306 1307 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1308 { 1309 snd_soc_dapm_dai_free_widgets(list); 1310 } 1311 1312 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1313 struct snd_soc_dapm_widget_list *list) 1314 { 1315 struct snd_soc_dai *dai; 1316 unsigned int i; 1317 1318 /* is there a valid DAI widget for this BE */ 1319 for_each_rtd_dais(dpcm->be, i, dai) { 1320 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1321 1322 /* 1323 * The BE is pruned only if none of the dai 1324 * widgets are in the active list. 1325 */ 1326 if (widget && widget_in_list(list, widget)) 1327 return true; 1328 } 1329 1330 return false; 1331 } 1332 1333 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1334 struct snd_soc_dapm_widget_list **list_) 1335 { 1336 struct snd_soc_dpcm *dpcm; 1337 int prune = 0; 1338 1339 /* Destroy any old FE <--> BE connections */ 1340 for_each_dpcm_be(fe, stream, dpcm) { 1341 if (dpcm_be_is_active(dpcm, stream, *list_)) 1342 continue; 1343 1344 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1345 stream ? "capture" : "playback", 1346 dpcm->be->dai_link->name, fe->dai_link->name); 1347 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1348 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1349 prune++; 1350 } 1351 1352 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1353 return prune; 1354 } 1355 1356 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1357 struct snd_soc_dapm_widget_list **list_) 1358 { 1359 struct snd_soc_card *card = fe->card; 1360 struct snd_soc_dapm_widget_list *list = *list_; 1361 struct snd_soc_pcm_runtime *be; 1362 struct snd_soc_dapm_widget *widget; 1363 int i, new = 0, err; 1364 1365 /* Create any new FE <--> BE connections */ 1366 for_each_dapm_widgets(list, i, widget) { 1367 1368 switch (widget->id) { 1369 case snd_soc_dapm_dai_in: 1370 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1371 continue; 1372 break; 1373 case snd_soc_dapm_dai_out: 1374 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1375 continue; 1376 break; 1377 default: 1378 continue; 1379 } 1380 1381 /* is there a valid BE rtd for this widget */ 1382 be = dpcm_get_be(card, widget, stream); 1383 if (!be) { 1384 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1385 widget->name); 1386 continue; 1387 } 1388 1389 /* don't connect if FE is not running */ 1390 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1391 continue; 1392 1393 /* 1394 * Filter for systems with 'component_chaining' enabled. 1395 * This helps to avoid unnecessary re-configuration of an 1396 * already active BE on such systems. 1397 */ 1398 if (fe->card->component_chaining && 1399 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1400 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1401 continue; 1402 1403 /* newly connected FE and BE */ 1404 err = dpcm_be_connect(fe, be, stream); 1405 if (err < 0) { 1406 dev_err(fe->dev, "ASoC: can't connect %s\n", 1407 widget->name); 1408 break; 1409 } else if (err == 0) /* already connected */ 1410 continue; 1411 1412 /* new */ 1413 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1414 new++; 1415 } 1416 1417 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1418 return new; 1419 } 1420 1421 /* 1422 * Find the corresponding BE DAIs that source or sink audio to this 1423 * FE substream. 1424 */ 1425 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1426 int stream, struct snd_soc_dapm_widget_list **list, int new) 1427 { 1428 if (new) 1429 return dpcm_add_paths(fe, stream, list); 1430 else 1431 return dpcm_prune_paths(fe, stream, list); 1432 } 1433 1434 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1435 { 1436 struct snd_soc_dpcm *dpcm; 1437 unsigned long flags; 1438 1439 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 1440 for_each_dpcm_be(fe, stream, dpcm) 1441 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1442 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 1443 } 1444 1445 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1446 int do_hw_free, struct snd_soc_dpcm *last) 1447 { 1448 struct snd_soc_dpcm *dpcm; 1449 1450 /* disable any enabled and non active backends */ 1451 for_each_dpcm_be(fe, stream, dpcm) { 1452 struct snd_soc_pcm_runtime *be = dpcm->be; 1453 struct snd_pcm_substream *be_substream = 1454 snd_soc_dpcm_get_substream(be, stream); 1455 1456 if (dpcm == last) 1457 return; 1458 1459 /* is this op for this BE ? */ 1460 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1461 continue; 1462 1463 if (be->dpcm[stream].users == 0) { 1464 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1465 stream ? "capture" : "playback", 1466 be->dpcm[stream].state); 1467 continue; 1468 } 1469 1470 if (--be->dpcm[stream].users != 0) 1471 continue; 1472 1473 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1474 if (!do_hw_free) 1475 continue; 1476 1477 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1478 soc_pcm_hw_free(be_substream); 1479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1480 } 1481 } 1482 1483 soc_pcm_close(be_substream); 1484 be_substream->runtime = NULL; 1485 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1486 } 1487 } 1488 1489 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1490 { 1491 struct snd_soc_pcm_runtime *be; 1492 struct snd_soc_dpcm *dpcm; 1493 int err, count = 0; 1494 1495 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1496 for_each_dpcm_be(fe, stream, dpcm) { 1497 struct snd_pcm_substream *be_substream; 1498 1499 be = dpcm->be; 1500 be_substream = snd_soc_dpcm_get_substream(be, stream); 1501 1502 if (!be_substream) { 1503 dev_err(be->dev, "ASoC: no backend %s stream\n", 1504 stream ? "capture" : "playback"); 1505 continue; 1506 } 1507 1508 /* is this op for this BE ? */ 1509 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1510 continue; 1511 1512 /* first time the dpcm is open ? */ 1513 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1514 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1515 stream ? "capture" : "playback", 1516 be->dpcm[stream].state); 1517 continue; 1518 } 1519 1520 if (be->dpcm[stream].users++ != 0) 1521 continue; 1522 1523 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1524 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1525 continue; 1526 1527 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1528 stream ? "capture" : "playback", be->dai_link->name); 1529 1530 be_substream->runtime = be->dpcm[stream].runtime; 1531 err = soc_pcm_open(be_substream); 1532 if (err < 0) { 1533 be->dpcm[stream].users--; 1534 if (be->dpcm[stream].users < 0) 1535 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1536 stream ? "capture" : "playback", 1537 be->dpcm[stream].state); 1538 1539 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1540 goto unwind; 1541 } 1542 1543 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1544 count++; 1545 } 1546 1547 return count; 1548 1549 unwind: 1550 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1551 1552 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1553 __func__, be->dai_link->name, err); 1554 1555 return err; 1556 } 1557 1558 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1559 { 1560 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1561 struct snd_pcm_runtime *runtime = substream->runtime; 1562 struct snd_pcm_hardware *hw = &runtime->hw; 1563 struct snd_soc_dai *dai; 1564 int stream = substream->stream; 1565 int i; 1566 1567 soc_pcm_hw_init(hw); 1568 1569 for_each_rtd_cpu_dais(fe, i, dai) { 1570 struct snd_soc_pcm_stream *cpu_stream; 1571 1572 /* 1573 * Skip CPUs which don't support the current stream 1574 * type. See soc_pcm_init_runtime_hw() for more details 1575 */ 1576 if (!snd_soc_dai_stream_valid(dai, stream)) 1577 continue; 1578 1579 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1580 1581 soc_pcm_hw_update_rate(hw, cpu_stream); 1582 soc_pcm_hw_update_chan(hw, cpu_stream); 1583 soc_pcm_hw_update_format(hw, cpu_stream); 1584 } 1585 1586 } 1587 1588 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1589 { 1590 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1591 struct snd_pcm_runtime *runtime = substream->runtime; 1592 struct snd_pcm_hardware *hw = &runtime->hw; 1593 struct snd_soc_dpcm *dpcm; 1594 struct snd_soc_dai *dai; 1595 int stream = substream->stream; 1596 1597 if (!fe->dai_link->dpcm_merged_format) 1598 return; 1599 1600 /* 1601 * It returns merged BE codec format 1602 * if FE want to use it (= dpcm_merged_format) 1603 */ 1604 1605 for_each_dpcm_be(fe, stream, dpcm) { 1606 struct snd_soc_pcm_runtime *be = dpcm->be; 1607 struct snd_soc_pcm_stream *codec_stream; 1608 int i; 1609 1610 for_each_rtd_codec_dais(be, i, dai) { 1611 /* 1612 * Skip CODECs which don't support the current stream 1613 * type. See soc_pcm_init_runtime_hw() for more details 1614 */ 1615 if (!snd_soc_dai_stream_valid(dai, stream)) 1616 continue; 1617 1618 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1619 1620 soc_pcm_hw_update_format(hw, codec_stream); 1621 } 1622 } 1623 } 1624 1625 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1626 { 1627 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1628 struct snd_pcm_runtime *runtime = substream->runtime; 1629 struct snd_pcm_hardware *hw = &runtime->hw; 1630 struct snd_soc_dpcm *dpcm; 1631 int stream = substream->stream; 1632 1633 if (!fe->dai_link->dpcm_merged_chan) 1634 return; 1635 1636 /* 1637 * It returns merged BE codec channel; 1638 * if FE want to use it (= dpcm_merged_chan) 1639 */ 1640 1641 for_each_dpcm_be(fe, stream, dpcm) { 1642 struct snd_soc_pcm_runtime *be = dpcm->be; 1643 struct snd_soc_pcm_stream *cpu_stream; 1644 struct snd_soc_dai *dai; 1645 int i; 1646 1647 for_each_rtd_cpu_dais(be, i, dai) { 1648 /* 1649 * Skip CPUs which don't support the current stream 1650 * type. See soc_pcm_init_runtime_hw() for more details 1651 */ 1652 if (!snd_soc_dai_stream_valid(dai, stream)) 1653 continue; 1654 1655 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1656 1657 soc_pcm_hw_update_chan(hw, cpu_stream); 1658 } 1659 1660 /* 1661 * chan min/max cannot be enforced if there are multiple CODEC 1662 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1663 */ 1664 if (be->num_codecs == 1) { 1665 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1666 asoc_rtd_to_codec(be, 0), stream); 1667 1668 soc_pcm_hw_update_chan(hw, codec_stream); 1669 } 1670 } 1671 } 1672 1673 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1674 { 1675 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1676 struct snd_pcm_runtime *runtime = substream->runtime; 1677 struct snd_pcm_hardware *hw = &runtime->hw; 1678 struct snd_soc_dpcm *dpcm; 1679 int stream = substream->stream; 1680 1681 if (!fe->dai_link->dpcm_merged_rate) 1682 return; 1683 1684 /* 1685 * It returns merged BE codec channel; 1686 * if FE want to use it (= dpcm_merged_chan) 1687 */ 1688 1689 for_each_dpcm_be(fe, stream, dpcm) { 1690 struct snd_soc_pcm_runtime *be = dpcm->be; 1691 struct snd_soc_pcm_stream *pcm; 1692 struct snd_soc_dai *dai; 1693 int i; 1694 1695 for_each_rtd_dais(be, i, dai) { 1696 /* 1697 * Skip DAIs which don't support the current stream 1698 * type. See soc_pcm_init_runtime_hw() for more details 1699 */ 1700 if (!snd_soc_dai_stream_valid(dai, stream)) 1701 continue; 1702 1703 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1704 1705 soc_pcm_hw_update_rate(hw, pcm); 1706 } 1707 } 1708 } 1709 1710 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1711 int stream) 1712 { 1713 struct snd_soc_dpcm *dpcm; 1714 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1715 struct snd_soc_dai *fe_cpu_dai; 1716 int err = 0; 1717 int i; 1718 1719 /* apply symmetry for FE */ 1720 soc_pcm_update_symmetry(fe_substream); 1721 1722 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1723 /* Symmetry only applies if we've got an active stream. */ 1724 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1725 if (err < 0) 1726 goto error; 1727 } 1728 1729 /* apply symmetry for BE */ 1730 for_each_dpcm_be(fe, stream, dpcm) { 1731 struct snd_soc_pcm_runtime *be = dpcm->be; 1732 struct snd_pcm_substream *be_substream = 1733 snd_soc_dpcm_get_substream(be, stream); 1734 struct snd_soc_pcm_runtime *rtd; 1735 struct snd_soc_dai *dai; 1736 1737 /* A backend may not have the requested substream */ 1738 if (!be_substream) 1739 continue; 1740 1741 rtd = asoc_substream_to_rtd(be_substream); 1742 if (rtd->dai_link->be_hw_params_fixup) 1743 continue; 1744 1745 soc_pcm_update_symmetry(be_substream); 1746 1747 /* Symmetry only applies if we've got an active stream. */ 1748 for_each_rtd_dais(rtd, i, dai) { 1749 err = soc_pcm_apply_symmetry(fe_substream, dai); 1750 if (err < 0) 1751 goto error; 1752 } 1753 } 1754 error: 1755 if (err < 0) 1756 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err); 1757 1758 return err; 1759 } 1760 1761 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1762 { 1763 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1764 int stream = fe_substream->stream, ret = 0; 1765 1766 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1767 1768 ret = dpcm_be_dai_startup(fe, stream); 1769 if (ret < 0) 1770 goto be_err; 1771 1772 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1773 1774 /* start the DAI frontend */ 1775 ret = soc_pcm_open(fe_substream); 1776 if (ret < 0) 1777 goto unwind; 1778 1779 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1780 1781 dpcm_runtime_setup_fe(fe_substream); 1782 1783 dpcm_runtime_setup_be_format(fe_substream); 1784 dpcm_runtime_setup_be_chan(fe_substream); 1785 dpcm_runtime_setup_be_rate(fe_substream); 1786 1787 ret = dpcm_apply_symmetry(fe_substream, stream); 1788 1789 unwind: 1790 if (ret < 0) 1791 dpcm_be_dai_startup_unwind(fe, stream); 1792 be_err: 1793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1794 1795 if (ret < 0) 1796 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret); 1797 1798 return ret; 1799 } 1800 1801 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1802 { 1803 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1804 int stream = substream->stream; 1805 1806 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1807 1808 /* shutdown the BEs */ 1809 dpcm_be_dai_shutdown(fe, stream); 1810 1811 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1812 1813 /* now shutdown the frontend */ 1814 soc_pcm_close(substream); 1815 1816 /* run the stream stop event */ 1817 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1818 1819 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1820 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1821 return 0; 1822 } 1823 1824 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1825 { 1826 struct snd_soc_dpcm *dpcm; 1827 1828 /* only hw_params backends that are either sinks or sources 1829 * to this frontend DAI */ 1830 for_each_dpcm_be(fe, stream, dpcm) { 1831 1832 struct snd_soc_pcm_runtime *be = dpcm->be; 1833 struct snd_pcm_substream *be_substream = 1834 snd_soc_dpcm_get_substream(be, stream); 1835 1836 /* is this op for this BE ? */ 1837 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1838 continue; 1839 1840 /* only free hw when no longer used - check all FEs */ 1841 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1842 continue; 1843 1844 /* do not free hw if this BE is used by other FE */ 1845 if (be->dpcm[stream].users > 1) 1846 continue; 1847 1848 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1849 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1850 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1851 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1852 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1853 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1854 continue; 1855 1856 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1857 be->dai_link->name); 1858 1859 soc_pcm_hw_free(be_substream); 1860 1861 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1862 } 1863 } 1864 1865 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1866 { 1867 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1868 int stream = substream->stream; 1869 1870 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1871 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1872 1873 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1874 1875 /* call hw_free on the frontend */ 1876 soc_pcm_hw_free(substream); 1877 1878 /* only hw_params backends that are either sinks or sources 1879 * to this frontend DAI */ 1880 dpcm_be_dai_hw_free(fe, stream); 1881 1882 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1883 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1884 1885 mutex_unlock(&fe->card->mutex); 1886 return 0; 1887 } 1888 1889 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1890 { 1891 struct snd_soc_pcm_runtime *be; 1892 struct snd_pcm_substream *be_substream; 1893 struct snd_soc_dpcm *dpcm; 1894 int ret; 1895 1896 for_each_dpcm_be(fe, stream, dpcm) { 1897 be = dpcm->be; 1898 be_substream = snd_soc_dpcm_get_substream(be, stream); 1899 1900 /* is this op for this BE ? */ 1901 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1902 continue; 1903 1904 /* copy params for each dpcm */ 1905 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1906 sizeof(struct snd_pcm_hw_params)); 1907 1908 /* perform any hw_params fixups */ 1909 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params); 1910 if (ret < 0) 1911 goto unwind; 1912 1913 /* copy the fixed-up hw params for BE dai */ 1914 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 1915 sizeof(struct snd_pcm_hw_params)); 1916 1917 /* only allow hw_params() if no connected FEs are running */ 1918 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 1919 continue; 1920 1921 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1922 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1923 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 1924 continue; 1925 1926 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 1927 be->dai_link->name); 1928 1929 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); 1930 if (ret < 0) 1931 goto unwind; 1932 1933 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1934 } 1935 return 0; 1936 1937 unwind: 1938 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1939 __func__, be->dai_link->name, ret); 1940 1941 /* disable any enabled and non active backends */ 1942 for_each_dpcm_be_rollback(fe, stream, dpcm) { 1943 be = dpcm->be; 1944 be_substream = snd_soc_dpcm_get_substream(be, stream); 1945 1946 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1947 continue; 1948 1949 /* only allow hw_free() if no connected FEs are running */ 1950 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1951 continue; 1952 1953 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 1954 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1955 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1956 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 1957 continue; 1958 1959 soc_pcm_hw_free(be_substream); 1960 } 1961 1962 return ret; 1963 } 1964 1965 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 1966 struct snd_pcm_hw_params *params) 1967 { 1968 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1969 int ret, stream = substream->stream; 1970 1971 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 1972 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1973 1974 memcpy(&fe->dpcm[stream].hw_params, params, 1975 sizeof(struct snd_pcm_hw_params)); 1976 ret = dpcm_be_dai_hw_params(fe, stream); 1977 if (ret < 0) 1978 goto out; 1979 1980 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 1981 fe->dai_link->name, params_rate(params), 1982 params_channels(params), params_format(params)); 1983 1984 /* call hw_params on the frontend */ 1985 ret = soc_pcm_hw_params(substream, params); 1986 if (ret < 0) 1987 dpcm_be_dai_hw_free(fe, stream); 1988 else 1989 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 1990 1991 out: 1992 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1993 mutex_unlock(&fe->card->mutex); 1994 1995 if (ret < 0) 1996 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret); 1997 1998 return ret; 1999 } 2000 2001 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2002 int cmd) 2003 { 2004 struct snd_soc_pcm_runtime *be; 2005 struct snd_soc_dpcm *dpcm; 2006 int ret = 0; 2007 2008 for_each_dpcm_be(fe, stream, dpcm) { 2009 struct snd_pcm_substream *be_substream; 2010 2011 be = dpcm->be; 2012 be_substream = snd_soc_dpcm_get_substream(be, stream); 2013 2014 /* is this op for this BE ? */ 2015 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2016 continue; 2017 2018 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2019 be->dai_link->name, cmd); 2020 2021 switch (cmd) { 2022 case SNDRV_PCM_TRIGGER_START: 2023 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2024 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2025 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2026 continue; 2027 2028 ret = soc_pcm_trigger(be_substream, cmd); 2029 if (ret) 2030 goto end; 2031 2032 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2033 break; 2034 case SNDRV_PCM_TRIGGER_RESUME: 2035 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2036 continue; 2037 2038 ret = soc_pcm_trigger(be_substream, cmd); 2039 if (ret) 2040 goto end; 2041 2042 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2043 break; 2044 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2045 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2046 continue; 2047 2048 ret = soc_pcm_trigger(be_substream, cmd); 2049 if (ret) 2050 goto end; 2051 2052 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2053 break; 2054 case SNDRV_PCM_TRIGGER_STOP: 2055 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2056 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2057 continue; 2058 2059 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2060 continue; 2061 2062 ret = soc_pcm_trigger(be_substream, cmd); 2063 if (ret) 2064 goto end; 2065 2066 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2067 break; 2068 case SNDRV_PCM_TRIGGER_SUSPEND: 2069 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2070 continue; 2071 2072 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2073 continue; 2074 2075 ret = soc_pcm_trigger(be_substream, cmd); 2076 if (ret) 2077 goto end; 2078 2079 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2080 break; 2081 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2082 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2083 continue; 2084 2085 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2086 continue; 2087 2088 ret = soc_pcm_trigger(be_substream, cmd); 2089 if (ret) 2090 goto end; 2091 2092 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2093 break; 2094 } 2095 } 2096 end: 2097 if (ret < 0) 2098 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2099 __func__, be->dai_link->name, ret); 2100 return ret; 2101 } 2102 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2103 2104 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2105 int cmd, bool fe_first) 2106 { 2107 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2108 int ret; 2109 2110 /* call trigger on the frontend before the backend. */ 2111 if (fe_first) { 2112 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2113 fe->dai_link->name, cmd); 2114 2115 ret = soc_pcm_trigger(substream, cmd); 2116 if (ret < 0) 2117 return ret; 2118 2119 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2120 return ret; 2121 } 2122 2123 /* call trigger on the frontend after the backend. */ 2124 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2125 if (ret < 0) 2126 return ret; 2127 2128 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2129 fe->dai_link->name, cmd); 2130 2131 ret = soc_pcm_trigger(substream, cmd); 2132 2133 return ret; 2134 } 2135 2136 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2137 { 2138 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2139 int stream = substream->stream; 2140 int ret = 0; 2141 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2142 2143 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2144 2145 switch (trigger) { 2146 case SND_SOC_DPCM_TRIGGER_PRE: 2147 switch (cmd) { 2148 case SNDRV_PCM_TRIGGER_START: 2149 case SNDRV_PCM_TRIGGER_RESUME: 2150 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2151 case SNDRV_PCM_TRIGGER_DRAIN: 2152 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2153 break; 2154 case SNDRV_PCM_TRIGGER_STOP: 2155 case SNDRV_PCM_TRIGGER_SUSPEND: 2156 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2157 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2158 break; 2159 default: 2160 ret = -EINVAL; 2161 break; 2162 } 2163 break; 2164 case SND_SOC_DPCM_TRIGGER_POST: 2165 switch (cmd) { 2166 case SNDRV_PCM_TRIGGER_START: 2167 case SNDRV_PCM_TRIGGER_RESUME: 2168 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2169 case SNDRV_PCM_TRIGGER_DRAIN: 2170 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2171 break; 2172 case SNDRV_PCM_TRIGGER_STOP: 2173 case SNDRV_PCM_TRIGGER_SUSPEND: 2174 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2175 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2176 break; 2177 default: 2178 ret = -EINVAL; 2179 break; 2180 } 2181 break; 2182 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2183 /* bespoke trigger() - handles both FE and BEs */ 2184 2185 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2186 fe->dai_link->name, cmd); 2187 2188 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2189 break; 2190 default: 2191 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2192 fe->dai_link->name); 2193 ret = -EINVAL; 2194 goto out; 2195 } 2196 2197 if (ret < 0) { 2198 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2199 cmd, ret); 2200 goto out; 2201 } 2202 2203 switch (cmd) { 2204 case SNDRV_PCM_TRIGGER_START: 2205 case SNDRV_PCM_TRIGGER_RESUME: 2206 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2207 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2208 break; 2209 case SNDRV_PCM_TRIGGER_STOP: 2210 case SNDRV_PCM_TRIGGER_SUSPEND: 2211 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2212 break; 2213 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2214 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2215 break; 2216 } 2217 2218 out: 2219 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2220 return ret; 2221 } 2222 2223 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2224 { 2225 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2226 int stream = substream->stream; 2227 2228 /* if FE's runtime_update is already set, we're in race; 2229 * process this trigger later at exit 2230 */ 2231 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2232 fe->dpcm[stream].trigger_pending = cmd + 1; 2233 return 0; /* delayed, assuming it's successful */ 2234 } 2235 2236 /* we're alone, let's trigger */ 2237 return dpcm_fe_dai_do_trigger(substream, cmd); 2238 } 2239 2240 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2241 { 2242 struct snd_soc_dpcm *dpcm; 2243 int ret = 0; 2244 2245 for_each_dpcm_be(fe, stream, dpcm) { 2246 2247 struct snd_soc_pcm_runtime *be = dpcm->be; 2248 struct snd_pcm_substream *be_substream = 2249 snd_soc_dpcm_get_substream(be, stream); 2250 2251 /* is this op for this BE ? */ 2252 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2253 continue; 2254 2255 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2256 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2257 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2258 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2259 continue; 2260 2261 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2262 be->dai_link->name); 2263 2264 ret = soc_pcm_prepare(be_substream); 2265 if (ret < 0) 2266 break; 2267 2268 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2269 } 2270 2271 if (ret < 0) 2272 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2273 2274 return ret; 2275 } 2276 2277 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2278 { 2279 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2280 int stream = substream->stream, ret = 0; 2281 2282 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2283 2284 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2285 2286 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2287 2288 /* there is no point preparing this FE if there are no BEs */ 2289 if (list_empty(&fe->dpcm[stream].be_clients)) { 2290 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2291 fe->dai_link->name); 2292 ret = -EINVAL; 2293 goto out; 2294 } 2295 2296 ret = dpcm_be_dai_prepare(fe, stream); 2297 if (ret < 0) 2298 goto out; 2299 2300 /* call prepare on the frontend */ 2301 ret = soc_pcm_prepare(substream); 2302 if (ret < 0) 2303 goto out; 2304 2305 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2306 2307 out: 2308 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2309 mutex_unlock(&fe->card->mutex); 2310 2311 if (ret < 0) 2312 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2313 2314 return ret; 2315 } 2316 2317 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2318 { 2319 struct snd_pcm_substream *substream = 2320 snd_soc_dpcm_get_substream(fe, stream); 2321 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2322 int err; 2323 2324 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2325 stream ? "capture" : "playback", fe->dai_link->name); 2326 2327 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2328 /* call bespoke trigger - FE takes care of all BE triggers */ 2329 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2330 fe->dai_link->name); 2331 2332 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2333 } else { 2334 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2335 fe->dai_link->name); 2336 2337 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2338 } 2339 2340 dpcm_be_dai_hw_free(fe, stream); 2341 2342 dpcm_be_dai_shutdown(fe, stream); 2343 2344 /* run the stream event for each BE */ 2345 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2346 2347 if (err < 0) 2348 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err); 2349 2350 return err; 2351 } 2352 2353 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2354 { 2355 struct snd_pcm_substream *substream = 2356 snd_soc_dpcm_get_substream(fe, stream); 2357 struct snd_soc_dpcm *dpcm; 2358 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2359 int ret = 0; 2360 unsigned long flags; 2361 2362 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2363 stream ? "capture" : "playback", fe->dai_link->name); 2364 2365 /* Only start the BE if the FE is ready */ 2366 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2367 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2368 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2369 fe->dai_link->name, fe->dpcm[stream].state); 2370 ret = -EINVAL; 2371 goto disconnect; 2372 } 2373 2374 /* startup must always be called for new BEs */ 2375 ret = dpcm_be_dai_startup(fe, stream); 2376 if (ret < 0) 2377 goto disconnect; 2378 2379 /* keep going if FE state is > open */ 2380 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2381 return 0; 2382 2383 ret = dpcm_be_dai_hw_params(fe, stream); 2384 if (ret < 0) 2385 goto close; 2386 2387 /* keep going if FE state is > hw_params */ 2388 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2389 return 0; 2390 2391 ret = dpcm_be_dai_prepare(fe, stream); 2392 if (ret < 0) 2393 goto hw_free; 2394 2395 /* run the stream event for each BE */ 2396 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2397 2398 /* keep going if FE state is > prepare */ 2399 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2400 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2401 return 0; 2402 2403 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2404 /* call trigger on the frontend - FE takes care of all BE triggers */ 2405 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2406 fe->dai_link->name); 2407 2408 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2409 if (ret < 0) 2410 goto hw_free; 2411 } else { 2412 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2413 fe->dai_link->name); 2414 2415 ret = dpcm_be_dai_trigger(fe, stream, 2416 SNDRV_PCM_TRIGGER_START); 2417 if (ret < 0) 2418 goto hw_free; 2419 } 2420 2421 return 0; 2422 2423 hw_free: 2424 dpcm_be_dai_hw_free(fe, stream); 2425 close: 2426 dpcm_be_dai_shutdown(fe, stream); 2427 disconnect: 2428 /* disconnect any pending BEs */ 2429 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2430 for_each_dpcm_be(fe, stream, dpcm) { 2431 struct snd_soc_pcm_runtime *be = dpcm->be; 2432 2433 /* is this op for this BE ? */ 2434 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2435 continue; 2436 2437 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2438 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2439 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2440 } 2441 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2442 2443 if (ret < 0) 2444 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2445 2446 return ret; 2447 } 2448 2449 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2450 { 2451 struct snd_soc_dapm_widget_list *list; 2452 int stream; 2453 int count, paths; 2454 2455 if (!fe->dai_link->dynamic) 2456 return 0; 2457 2458 if (fe->num_cpus > 1) { 2459 dev_err(fe->dev, 2460 "%s doesn't support Multi CPU yet\n", __func__); 2461 return -EINVAL; 2462 } 2463 2464 /* only check active links */ 2465 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2466 return 0; 2467 2468 /* DAPM sync will call this to update DSP paths */ 2469 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2470 new ? "new" : "old", fe->dai_link->name); 2471 2472 for_each_pcm_streams(stream) { 2473 2474 /* skip if FE doesn't have playback/capture capability */ 2475 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2476 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2477 continue; 2478 2479 /* skip if FE isn't currently playing/capturing */ 2480 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2481 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2482 continue; 2483 2484 paths = dpcm_path_get(fe, stream, &list); 2485 if (paths < 0) 2486 return paths; 2487 2488 /* update any playback/capture paths */ 2489 count = dpcm_process_paths(fe, stream, &list, new); 2490 if (count) { 2491 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2492 if (new) 2493 dpcm_run_update_startup(fe, stream); 2494 else 2495 dpcm_run_update_shutdown(fe, stream); 2496 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2497 2498 dpcm_clear_pending_state(fe, stream); 2499 dpcm_be_disconnect(fe, stream); 2500 } 2501 2502 dpcm_path_put(&list); 2503 } 2504 2505 return 0; 2506 } 2507 2508 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2509 * any DAI links. 2510 */ 2511 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2512 { 2513 struct snd_soc_pcm_runtime *fe; 2514 int ret = 0; 2515 2516 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2517 /* shutdown all old paths first */ 2518 for_each_card_rtds(card, fe) { 2519 ret = soc_dpcm_fe_runtime_update(fe, 0); 2520 if (ret) 2521 goto out; 2522 } 2523 2524 /* bring new paths up */ 2525 for_each_card_rtds(card, fe) { 2526 ret = soc_dpcm_fe_runtime_update(fe, 1); 2527 if (ret) 2528 goto out; 2529 } 2530 2531 out: 2532 mutex_unlock(&card->mutex); 2533 return ret; 2534 } 2535 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2536 2537 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2538 { 2539 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2540 struct snd_soc_dpcm *dpcm; 2541 int stream = fe_substream->stream; 2542 2543 /* mark FE's links ready to prune */ 2544 for_each_dpcm_be(fe, stream, dpcm) 2545 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2546 2547 dpcm_be_disconnect(fe, stream); 2548 2549 fe->dpcm[stream].runtime = NULL; 2550 } 2551 2552 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2553 { 2554 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2555 int ret; 2556 2557 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2558 ret = dpcm_fe_dai_shutdown(fe_substream); 2559 2560 dpcm_fe_dai_cleanup(fe_substream); 2561 2562 mutex_unlock(&fe->card->mutex); 2563 return ret; 2564 } 2565 2566 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2567 { 2568 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2569 struct snd_soc_dapm_widget_list *list; 2570 int ret; 2571 int stream = fe_substream->stream; 2572 2573 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); 2574 fe->dpcm[stream].runtime = fe_substream->runtime; 2575 2576 ret = dpcm_path_get(fe, stream, &list); 2577 if (ret < 0) 2578 goto open_end; 2579 2580 /* calculate valid and active FE <-> BE dpcms */ 2581 dpcm_process_paths(fe, stream, &list, 1); 2582 2583 ret = dpcm_fe_dai_startup(fe_substream); 2584 if (ret < 0) 2585 dpcm_fe_dai_cleanup(fe_substream); 2586 2587 dpcm_clear_pending_state(fe, stream); 2588 dpcm_path_put(&list); 2589 open_end: 2590 mutex_unlock(&fe->card->mutex); 2591 return ret; 2592 } 2593 2594 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2595 int *playback, int *capture) 2596 { 2597 struct snd_soc_dai *cpu_dai; 2598 int i; 2599 2600 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) { 2601 dev_err(rtd->dev, 2602 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2603 return -EINVAL; 2604 } 2605 2606 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2607 int stream; 2608 2609 if (rtd->dai_link->dpcm_playback) { 2610 stream = SNDRV_PCM_STREAM_PLAYBACK; 2611 2612 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2613 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2614 *playback = 1; 2615 break; 2616 } 2617 } 2618 if (!*playback) { 2619 dev_err(rtd->card->dev, 2620 "No CPU DAIs support playback for stream %s\n", 2621 rtd->dai_link->stream_name); 2622 return -EINVAL; 2623 } 2624 } 2625 if (rtd->dai_link->dpcm_capture) { 2626 stream = SNDRV_PCM_STREAM_CAPTURE; 2627 2628 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2629 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2630 *capture = 1; 2631 break; 2632 } 2633 } 2634 2635 if (!*capture) { 2636 dev_err(rtd->card->dev, 2637 "No CPU DAIs support capture for stream %s\n", 2638 rtd->dai_link->stream_name); 2639 return -EINVAL; 2640 } 2641 } 2642 } else { 2643 struct snd_soc_dai *codec_dai; 2644 2645 /* Adapt stream for codec2codec links */ 2646 int cpu_capture = rtd->dai_link->params ? 2647 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2648 int cpu_playback = rtd->dai_link->params ? 2649 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2650 2651 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2652 if (rtd->num_cpus == 1) { 2653 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2654 } else if (rtd->num_cpus == rtd->num_codecs) { 2655 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2656 } else { 2657 dev_err(rtd->card->dev, 2658 "N cpus to M codecs link is not supported yet\n"); 2659 return -EINVAL; 2660 } 2661 2662 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2663 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2664 *playback = 1; 2665 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2666 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2667 *capture = 1; 2668 } 2669 } 2670 2671 if (rtd->dai_link->playback_only) { 2672 *playback = 1; 2673 *capture = 0; 2674 } 2675 2676 if (rtd->dai_link->capture_only) { 2677 *playback = 0; 2678 *capture = 1; 2679 } 2680 2681 return 0; 2682 } 2683 2684 static int soc_create_pcm(struct snd_pcm **pcm, 2685 struct snd_soc_pcm_runtime *rtd, 2686 int playback, int capture, int num) 2687 { 2688 char new_name[64]; 2689 int ret; 2690 2691 /* create the PCM */ 2692 if (rtd->dai_link->params) { 2693 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2694 rtd->dai_link->stream_name); 2695 2696 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2697 playback, capture, pcm); 2698 } else if (rtd->dai_link->no_pcm) { 2699 snprintf(new_name, sizeof(new_name), "(%s)", 2700 rtd->dai_link->stream_name); 2701 2702 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2703 playback, capture, pcm); 2704 } else { 2705 if (rtd->dai_link->dynamic) 2706 snprintf(new_name, sizeof(new_name), "%s (*)", 2707 rtd->dai_link->stream_name); 2708 else 2709 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2710 rtd->dai_link->stream_name, 2711 soc_codec_dai_name(rtd), num); 2712 2713 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2714 capture, pcm); 2715 } 2716 if (ret < 0) { 2717 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2718 new_name, rtd->dai_link->name, ret); 2719 return ret; 2720 } 2721 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2722 2723 return 0; 2724 } 2725 2726 /* create a new pcm */ 2727 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2728 { 2729 struct snd_soc_component *component; 2730 struct snd_pcm *pcm; 2731 int ret = 0, playback = 0, capture = 0; 2732 int i; 2733 2734 ret = soc_get_playback_capture(rtd, &playback, &capture); 2735 if (ret < 0) 2736 return ret; 2737 2738 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2739 if (ret < 0) 2740 return ret; 2741 2742 /* DAPM dai link stream work */ 2743 if (rtd->dai_link->params) 2744 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2745 else 2746 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2747 2748 rtd->pcm = pcm; 2749 pcm->nonatomic = rtd->dai_link->nonatomic; 2750 pcm->private_data = rtd; 2751 2752 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2753 if (playback) 2754 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2755 if (capture) 2756 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2757 goto out; 2758 } 2759 2760 /* ASoC PCM operations */ 2761 if (rtd->dai_link->dynamic) { 2762 rtd->ops.open = dpcm_fe_dai_open; 2763 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2764 rtd->ops.prepare = dpcm_fe_dai_prepare; 2765 rtd->ops.trigger = dpcm_fe_dai_trigger; 2766 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2767 rtd->ops.close = dpcm_fe_dai_close; 2768 rtd->ops.pointer = soc_pcm_pointer; 2769 } else { 2770 rtd->ops.open = soc_pcm_open; 2771 rtd->ops.hw_params = soc_pcm_hw_params; 2772 rtd->ops.prepare = soc_pcm_prepare; 2773 rtd->ops.trigger = soc_pcm_trigger; 2774 rtd->ops.hw_free = soc_pcm_hw_free; 2775 rtd->ops.close = soc_pcm_close; 2776 rtd->ops.pointer = soc_pcm_pointer; 2777 } 2778 2779 for_each_rtd_components(rtd, i, component) { 2780 const struct snd_soc_component_driver *drv = component->driver; 2781 2782 if (drv->ioctl) 2783 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2784 if (drv->sync_stop) 2785 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2786 if (drv->copy_user) 2787 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2788 if (drv->page) 2789 rtd->ops.page = snd_soc_pcm_component_page; 2790 if (drv->mmap) 2791 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2792 if (drv->ack) 2793 rtd->ops.ack = snd_soc_pcm_component_ack; 2794 } 2795 2796 if (playback) 2797 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2798 2799 if (capture) 2800 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2801 2802 ret = snd_soc_pcm_component_new(rtd); 2803 if (ret < 0) 2804 return ret; 2805 2806 pcm->no_device_suspend = true; 2807 out: 2808 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2809 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2810 return ret; 2811 } 2812 2813 /* is the current PCM operation for this FE ? */ 2814 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2815 { 2816 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2817 return 1; 2818 return 0; 2819 } 2820 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2821 2822 /* is the current PCM operation for this BE ? */ 2823 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2824 struct snd_soc_pcm_runtime *be, int stream) 2825 { 2826 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2827 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2828 be->dpcm[stream].runtime_update)) 2829 return 1; 2830 return 0; 2831 } 2832 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2833 2834 /* get the substream for this BE */ 2835 struct snd_pcm_substream * 2836 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2837 { 2838 return be->pcm->streams[stream].substream; 2839 } 2840 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2841 2842 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2843 struct snd_soc_pcm_runtime *be, 2844 int stream, 2845 const enum snd_soc_dpcm_state *states, 2846 int num_states) 2847 { 2848 struct snd_soc_dpcm *dpcm; 2849 int state; 2850 int ret = 1; 2851 unsigned long flags; 2852 int i; 2853 2854 spin_lock_irqsave(&fe->card->dpcm_lock, flags); 2855 for_each_dpcm_fe(be, stream, dpcm) { 2856 2857 if (dpcm->fe == fe) 2858 continue; 2859 2860 state = dpcm->fe->dpcm[stream].state; 2861 for (i = 0; i < num_states; i++) { 2862 if (state == states[i]) { 2863 ret = 0; 2864 break; 2865 } 2866 } 2867 } 2868 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags); 2869 2870 /* it's safe to do this BE DAI */ 2871 return ret; 2872 } 2873 2874 /* 2875 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 2876 * are not running, paused or suspended for the specified stream direction. 2877 */ 2878 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 2879 struct snd_soc_pcm_runtime *be, int stream) 2880 { 2881 const enum snd_soc_dpcm_state state[] = { 2882 SND_SOC_DPCM_STATE_START, 2883 SND_SOC_DPCM_STATE_PAUSED, 2884 SND_SOC_DPCM_STATE_SUSPEND, 2885 }; 2886 2887 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2888 } 2889 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 2890 2891 /* 2892 * We can only change hw params a BE DAI if any of it's FE are not prepared, 2893 * running, paused or suspended for the specified stream direction. 2894 */ 2895 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 2896 struct snd_soc_pcm_runtime *be, int stream) 2897 { 2898 const enum snd_soc_dpcm_state state[] = { 2899 SND_SOC_DPCM_STATE_START, 2900 SND_SOC_DPCM_STATE_PAUSED, 2901 SND_SOC_DPCM_STATE_SUSPEND, 2902 SND_SOC_DPCM_STATE_PREPARE, 2903 }; 2904 2905 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 2906 } 2907 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 2908