1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // soc-pcm.c -- ALSA SoC PCM 4 // 5 // Copyright 2005 Wolfson Microelectronics PLC. 6 // Copyright 2005 Openedhand Ltd. 7 // Copyright (C) 2010 Slimlogic Ltd. 8 // Copyright (C) 2010 Texas Instruments Inc. 9 // 10 // Authors: Liam Girdwood <lrg@ti.com> 11 // Mark Brown <broonie@opensource.wolfsonmicro.com> 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pinctrl/consumer.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/export.h> 21 #include <linux/debugfs.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/soc-dpcm.h> 27 #include <sound/soc-link.h> 28 #include <sound/initval.h> 29 30 static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd) 31 { 32 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); 33 } 34 35 static inline void snd_soc_dpcm_mutex_unlock(struct snd_soc_pcm_runtime *rtd) 36 { 37 mutex_unlock(&rtd->card->pcm_mutex); 38 } 39 40 #define snd_soc_dpcm_mutex_assert_held(rtd) \ 41 lockdep_assert_held(&(rtd)->card->pcm_mutex) 42 43 static inline void snd_soc_dpcm_stream_lock_irq(struct snd_soc_pcm_runtime *rtd, 44 int stream) 45 { 46 snd_pcm_stream_lock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 47 } 48 49 #define snd_soc_dpcm_stream_lock_irqsave_nested(rtd, stream, flags) \ 50 snd_pcm_stream_lock_irqsave_nested(snd_soc_dpcm_get_substream(rtd, stream), flags) 51 52 static inline void snd_soc_dpcm_stream_unlock_irq(struct snd_soc_pcm_runtime *rtd, 53 int stream) 54 { 55 snd_pcm_stream_unlock_irq(snd_soc_dpcm_get_substream(rtd, stream)); 56 } 57 58 #define snd_soc_dpcm_stream_unlock_irqrestore(rtd, stream, flags) \ 59 snd_pcm_stream_unlock_irqrestore(snd_soc_dpcm_get_substream(rtd, stream), flags) 60 61 #define DPCM_MAX_BE_USERS 8 62 63 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd) 64 { 65 return (rtd)->num_cpus == 1 ? asoc_rtd_to_cpu(rtd, 0)->name : "multicpu"; 66 } 67 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd) 68 { 69 return (rtd)->num_codecs == 1 ? asoc_rtd_to_codec(rtd, 0)->name : "multicodec"; 70 } 71 72 #ifdef CONFIG_DEBUG_FS 73 static const char *dpcm_state_string(enum snd_soc_dpcm_state state) 74 { 75 switch (state) { 76 case SND_SOC_DPCM_STATE_NEW: 77 return "new"; 78 case SND_SOC_DPCM_STATE_OPEN: 79 return "open"; 80 case SND_SOC_DPCM_STATE_HW_PARAMS: 81 return "hw_params"; 82 case SND_SOC_DPCM_STATE_PREPARE: 83 return "prepare"; 84 case SND_SOC_DPCM_STATE_START: 85 return "start"; 86 case SND_SOC_DPCM_STATE_STOP: 87 return "stop"; 88 case SND_SOC_DPCM_STATE_SUSPEND: 89 return "suspend"; 90 case SND_SOC_DPCM_STATE_PAUSED: 91 return "paused"; 92 case SND_SOC_DPCM_STATE_HW_FREE: 93 return "hw_free"; 94 case SND_SOC_DPCM_STATE_CLOSE: 95 return "close"; 96 } 97 98 return "unknown"; 99 } 100 101 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, 102 int stream, char *buf, size_t size) 103 { 104 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; 105 struct snd_soc_dpcm *dpcm; 106 ssize_t offset = 0; 107 108 /* FE state */ 109 offset += scnprintf(buf + offset, size - offset, 110 "[%s - %s]\n", fe->dai_link->name, 111 stream ? "Capture" : "Playback"); 112 113 offset += scnprintf(buf + offset, size - offset, "State: %s\n", 114 dpcm_state_string(fe->dpcm[stream].state)); 115 116 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 117 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 118 offset += scnprintf(buf + offset, size - offset, 119 "Hardware Params: " 120 "Format = %s, Channels = %d, Rate = %d\n", 121 snd_pcm_format_name(params_format(params)), 122 params_channels(params), 123 params_rate(params)); 124 125 /* BEs state */ 126 offset += scnprintf(buf + offset, size - offset, "Backends:\n"); 127 128 if (list_empty(&fe->dpcm[stream].be_clients)) { 129 offset += scnprintf(buf + offset, size - offset, 130 " No active DSP links\n"); 131 goto out; 132 } 133 134 for_each_dpcm_be(fe, stream, dpcm) { 135 struct snd_soc_pcm_runtime *be = dpcm->be; 136 params = &dpcm->hw_params; 137 138 offset += scnprintf(buf + offset, size - offset, 139 "- %s\n", be->dai_link->name); 140 141 offset += scnprintf(buf + offset, size - offset, 142 " State: %s\n", 143 dpcm_state_string(be->dpcm[stream].state)); 144 145 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && 146 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) 147 offset += scnprintf(buf + offset, size - offset, 148 " Hardware Params: " 149 "Format = %s, Channels = %d, Rate = %d\n", 150 snd_pcm_format_name(params_format(params)), 151 params_channels(params), 152 params_rate(params)); 153 } 154 out: 155 return offset; 156 } 157 158 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, 159 size_t count, loff_t *ppos) 160 { 161 struct snd_soc_pcm_runtime *fe = file->private_data; 162 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; 163 int stream; 164 char *buf; 165 166 if (fe->num_cpus > 1) { 167 dev_err(fe->dev, 168 "%s doesn't support Multi CPU yet\n", __func__); 169 return -EINVAL; 170 } 171 172 buf = kmalloc(out_count, GFP_KERNEL); 173 if (!buf) 174 return -ENOMEM; 175 176 snd_soc_dpcm_mutex_lock(fe); 177 for_each_pcm_streams(stream) 178 if (snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream)) 179 offset += dpcm_show_state(fe, stream, 180 buf + offset, 181 out_count - offset); 182 snd_soc_dpcm_mutex_unlock(fe); 183 184 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); 185 186 kfree(buf); 187 return ret; 188 } 189 190 static const struct file_operations dpcm_state_fops = { 191 .open = simple_open, 192 .read = dpcm_state_read_file, 193 .llseek = default_llseek, 194 }; 195 196 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) 197 { 198 if (!rtd->dai_link->dynamic) 199 return; 200 201 if (!rtd->card->debugfs_card_root) 202 return; 203 204 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, 205 rtd->card->debugfs_card_root); 206 207 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, 208 rtd, &dpcm_state_fops); 209 } 210 211 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream) 212 { 213 char *name; 214 215 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name, 216 stream ? "capture" : "playback"); 217 if (name) { 218 dpcm->debugfs_state = debugfs_create_dir( 219 name, dpcm->fe->debugfs_dpcm_root); 220 debugfs_create_u32("state", 0644, dpcm->debugfs_state, 221 &dpcm->state); 222 kfree(name); 223 } 224 } 225 226 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 227 { 228 debugfs_remove_recursive(dpcm->debugfs_state); 229 } 230 231 #else 232 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, 233 int stream) 234 { 235 } 236 237 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm) 238 { 239 } 240 #endif 241 242 /* Set FE's runtime_update state; the state is protected via PCM stream lock 243 * for avoiding the race with trigger callback. 244 * If the state is unset and a trigger is pending while the previous operation, 245 * process the pending trigger action here. 246 */ 247 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd); 248 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe, 249 int stream, enum snd_soc_dpcm_update state) 250 { 251 struct snd_pcm_substream *substream = 252 snd_soc_dpcm_get_substream(fe, stream); 253 254 snd_soc_dpcm_stream_lock_irq(fe, stream); 255 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) { 256 dpcm_fe_dai_do_trigger(substream, 257 fe->dpcm[stream].trigger_pending - 1); 258 fe->dpcm[stream].trigger_pending = 0; 259 } 260 fe->dpcm[stream].runtime_update = state; 261 snd_soc_dpcm_stream_unlock_irq(fe, stream); 262 } 263 264 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be, 265 int stream, enum snd_soc_dpcm_update state) 266 { 267 be->dpcm[stream].runtime_update = state; 268 } 269 270 /** 271 * snd_soc_runtime_action() - Increment/Decrement active count for 272 * PCM runtime components 273 * @rtd: ASoC PCM runtime that is activated 274 * @stream: Direction of the PCM stream 275 * @action: Activate stream if 1. Deactivate if -1. 276 * 277 * Increments/Decrements the active count for all the DAIs and components 278 * attached to a PCM runtime. 279 * Should typically be called when a stream is opened. 280 * 281 * Must be called with the rtd->card->pcm_mutex being held 282 */ 283 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd, 284 int stream, int action) 285 { 286 struct snd_soc_dai *dai; 287 int i; 288 289 snd_soc_dpcm_mutex_assert_held(rtd); 290 291 for_each_rtd_dais(rtd, i, dai) 292 snd_soc_dai_action(dai, stream, action); 293 } 294 EXPORT_SYMBOL_GPL(snd_soc_runtime_action); 295 296 /** 297 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay 298 * @rtd: The ASoC PCM runtime that should be checked. 299 * 300 * This function checks whether the power down delay should be ignored for a 301 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has 302 * been configured to ignore the delay, or if none of the components benefits 303 * from having the delay. 304 */ 305 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) 306 { 307 struct snd_soc_component *component; 308 bool ignore = true; 309 int i; 310 311 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) 312 return true; 313 314 for_each_rtd_components(rtd, i, component) 315 ignore &= !component->driver->use_pmdown_time; 316 317 return ignore; 318 } 319 320 /** 321 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters 322 * @substream: the pcm substream 323 * @hw: the hardware parameters 324 * 325 * Sets the substream runtime hardware parameters. 326 */ 327 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, 328 const struct snd_pcm_hardware *hw) 329 { 330 substream->runtime->hw = *hw; 331 332 return 0; 333 } 334 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); 335 336 /* DPCM stream event, send event to FE and all active BEs. */ 337 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, 338 int event) 339 { 340 struct snd_soc_dpcm *dpcm; 341 342 snd_soc_dpcm_mutex_assert_held(fe); 343 344 for_each_dpcm_be(fe, dir, dpcm) { 345 346 struct snd_soc_pcm_runtime *be = dpcm->be; 347 348 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", 349 be->dai_link->name, event, dir); 350 351 if ((event == SND_SOC_DAPM_STREAM_STOP) && 352 (be->dpcm[dir].users >= 1)) 353 continue; 354 355 snd_soc_dapm_stream_event(be, dir, event); 356 } 357 358 snd_soc_dapm_stream_event(fe, dir, event); 359 360 return 0; 361 } 362 363 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai, 364 struct snd_pcm_hw_params *params) 365 { 366 if (params) { 367 dai->rate = params_rate(params); 368 dai->channels = params_channels(params); 369 dai->sample_bits = snd_pcm_format_physical_width(params_format(params)); 370 } else { 371 dai->rate = 0; 372 dai->channels = 0; 373 dai->sample_bits = 0; 374 } 375 } 376 377 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, 378 struct snd_soc_dai *soc_dai) 379 { 380 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 381 int ret; 382 383 if (!snd_soc_dai_active(soc_dai)) 384 return 0; 385 386 #define __soc_pcm_apply_symmetry(name, NAME) \ 387 if (soc_dai->name && (soc_dai->driver->symmetric_##name || \ 388 rtd->dai_link->symmetric_##name)) { \ 389 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\ 390 #name, soc_dai->name); \ 391 \ 392 ret = snd_pcm_hw_constraint_single(substream->runtime, \ 393 SNDRV_PCM_HW_PARAM_##NAME,\ 394 soc_dai->name); \ 395 if (ret < 0) { \ 396 dev_err(soc_dai->dev, \ 397 "ASoC: Unable to apply %s constraint: %d\n",\ 398 #name, ret); \ 399 return ret; \ 400 } \ 401 } 402 403 __soc_pcm_apply_symmetry(rate, RATE); 404 __soc_pcm_apply_symmetry(channels, CHANNELS); 405 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS); 406 407 return 0; 408 } 409 410 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, 411 struct snd_pcm_hw_params *params) 412 { 413 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 414 struct snd_soc_dai d; 415 struct snd_soc_dai *dai; 416 struct snd_soc_dai *cpu_dai; 417 unsigned int symmetry, i; 418 419 d.name = __func__; 420 soc_pcm_set_dai_params(&d, params); 421 422 #define __soc_pcm_params_symmetry(xxx) \ 423 symmetry = rtd->dai_link->symmetric_##xxx; \ 424 for_each_rtd_dais(rtd, i, dai) \ 425 symmetry |= dai->driver->symmetric_##xxx; \ 426 \ 427 if (symmetry) \ 428 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \ 429 if (!snd_soc_dai_is_dummy(cpu_dai) && \ 430 cpu_dai->xxx && cpu_dai->xxx != d.xxx) { \ 431 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \ 432 #xxx, cpu_dai->name, cpu_dai->xxx, d.name, d.xxx); \ 433 return -EINVAL; \ 434 } 435 436 /* reject unmatched parameters when applying symmetry */ 437 __soc_pcm_params_symmetry(rate); 438 __soc_pcm_params_symmetry(channels); 439 __soc_pcm_params_symmetry(sample_bits); 440 441 return 0; 442 } 443 444 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream) 445 { 446 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 447 struct snd_soc_dai_link *link = rtd->dai_link; 448 struct snd_soc_dai *dai; 449 unsigned int symmetry, i; 450 451 symmetry = link->symmetric_rate || 452 link->symmetric_channels || 453 link->symmetric_sample_bits; 454 455 for_each_rtd_dais(rtd, i, dai) 456 symmetry = symmetry || 457 dai->driver->symmetric_rate || 458 dai->driver->symmetric_channels || 459 dai->driver->symmetric_sample_bits; 460 461 if (symmetry) 462 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; 463 } 464 465 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits) 466 { 467 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 468 int ret; 469 470 if (!bits) 471 return; 472 473 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits); 474 if (ret != 0) 475 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n", 476 bits, ret); 477 } 478 479 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) 480 { 481 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 482 struct snd_soc_dai *cpu_dai; 483 struct snd_soc_dai *codec_dai; 484 int stream = substream->stream; 485 int i; 486 unsigned int bits = 0, cpu_bits = 0; 487 488 for_each_rtd_codec_dais(rtd, i, codec_dai) { 489 struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream); 490 491 if (pcm_codec->sig_bits == 0) { 492 bits = 0; 493 break; 494 } 495 bits = max(pcm_codec->sig_bits, bits); 496 } 497 498 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 499 struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 500 501 if (pcm_cpu->sig_bits == 0) { 502 cpu_bits = 0; 503 break; 504 } 505 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits); 506 } 507 508 soc_pcm_set_msb(substream, bits); 509 soc_pcm_set_msb(substream, cpu_bits); 510 } 511 512 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw) 513 { 514 hw->rates = UINT_MAX; 515 hw->rate_min = 0; 516 hw->rate_max = UINT_MAX; 517 hw->channels_min = 0; 518 hw->channels_max = UINT_MAX; 519 hw->formats = ULLONG_MAX; 520 } 521 522 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw, 523 struct snd_soc_pcm_stream *p) 524 { 525 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates); 526 527 /* setup hw->rate_min/max via hw->rates first */ 528 snd_pcm_hw_limit_rates(hw); 529 530 /* update hw->rate_min/max by snd_soc_pcm_stream */ 531 hw->rate_min = max(hw->rate_min, p->rate_min); 532 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max); 533 } 534 535 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw, 536 struct snd_soc_pcm_stream *p) 537 { 538 hw->channels_min = max(hw->channels_min, p->channels_min); 539 hw->channels_max = min(hw->channels_max, p->channels_max); 540 } 541 542 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw, 543 struct snd_soc_pcm_stream *p) 544 { 545 hw->formats &= p->formats; 546 } 547 548 /** 549 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream 550 * @rtd: ASoC PCM runtime 551 * @hw: PCM hardware parameters (output) 552 * @stream: Direction of the PCM stream 553 * 554 * Calculates the subset of stream parameters supported by all DAIs 555 * associated with the PCM stream. 556 */ 557 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, 558 struct snd_pcm_hardware *hw, int stream) 559 { 560 struct snd_soc_dai *codec_dai; 561 struct snd_soc_dai *cpu_dai; 562 struct snd_soc_pcm_stream *codec_stream; 563 struct snd_soc_pcm_stream *cpu_stream; 564 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX; 565 int i; 566 567 soc_pcm_hw_init(hw); 568 569 /* first calculate min/max only for CPUs in the DAI link */ 570 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 571 572 /* 573 * Skip CPUs which don't support the current stream type. 574 * Otherwise, since the rate, channel, and format values will 575 * zero in that case, we would have no usable settings left, 576 * causing the resulting setup to fail. 577 */ 578 if (!snd_soc_dai_stream_valid(cpu_dai, stream)) 579 continue; 580 581 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream); 582 583 soc_pcm_hw_update_chan(hw, cpu_stream); 584 soc_pcm_hw_update_rate(hw, cpu_stream); 585 soc_pcm_hw_update_format(hw, cpu_stream); 586 } 587 cpu_chan_min = hw->channels_min; 588 cpu_chan_max = hw->channels_max; 589 590 /* second calculate min/max only for CODECs in the DAI link */ 591 for_each_rtd_codec_dais(rtd, i, codec_dai) { 592 593 /* 594 * Skip CODECs which don't support the current stream type. 595 * Otherwise, since the rate, channel, and format values will 596 * zero in that case, we would have no usable settings left, 597 * causing the resulting setup to fail. 598 */ 599 if (!snd_soc_dai_stream_valid(codec_dai, stream)) 600 continue; 601 602 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream); 603 604 soc_pcm_hw_update_chan(hw, codec_stream); 605 soc_pcm_hw_update_rate(hw, codec_stream); 606 soc_pcm_hw_update_format(hw, codec_stream); 607 } 608 609 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */ 610 if (!hw->channels_min) 611 return -EINVAL; 612 613 /* 614 * chan min/max cannot be enforced if there are multiple CODEC DAIs 615 * connected to CPU DAI(s), use CPU DAI's directly and let 616 * channel allocation be fixed up later 617 */ 618 if (rtd->num_codecs > 1) { 619 hw->channels_min = cpu_chan_min; 620 hw->channels_max = cpu_chan_max; 621 } 622 623 return 0; 624 } 625 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); 626 627 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) 628 { 629 struct snd_pcm_hardware *hw = &substream->runtime->hw; 630 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 631 u64 formats = hw->formats; 632 633 /* 634 * At least one CPU and one CODEC should match. Otherwise, we should 635 * have bailed out on a higher level, since there would be no CPU or 636 * CODEC to support the transfer direction in that case. 637 */ 638 snd_soc_runtime_calc_hw(rtd, hw, substream->stream); 639 640 if (formats) 641 hw->formats &= formats; 642 } 643 644 static int soc_pcm_components_open(struct snd_pcm_substream *substream) 645 { 646 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 647 struct snd_soc_component *component; 648 int i, ret = 0; 649 650 for_each_rtd_components(rtd, i, component) { 651 ret = snd_soc_component_module_get_when_open(component, substream); 652 if (ret < 0) 653 break; 654 655 ret = snd_soc_component_open(component, substream); 656 if (ret < 0) 657 break; 658 } 659 660 return ret; 661 } 662 663 static int soc_pcm_components_close(struct snd_pcm_substream *substream, 664 int rollback) 665 { 666 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 667 struct snd_soc_component *component; 668 int i, ret = 0; 669 670 for_each_rtd_components(rtd, i, component) { 671 int r = snd_soc_component_close(component, substream, rollback); 672 if (r < 0) 673 ret = r; /* use last ret */ 674 675 snd_soc_component_module_put_when_close(component, substream, rollback); 676 } 677 678 return ret; 679 } 680 681 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd, 682 struct snd_pcm_substream *substream, int rollback) 683 { 684 struct snd_soc_component *component; 685 struct snd_soc_dai *dai; 686 int i; 687 688 snd_soc_dpcm_mutex_assert_held(rtd); 689 690 if (!rollback) 691 snd_soc_runtime_deactivate(rtd, substream->stream); 692 693 for_each_rtd_dais(rtd, i, dai) 694 snd_soc_dai_shutdown(dai, substream, rollback); 695 696 snd_soc_link_shutdown(substream, rollback); 697 698 soc_pcm_components_close(substream, rollback); 699 700 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback); 701 702 for_each_rtd_components(rtd, i, component) 703 if (!snd_soc_component_active(component)) 704 pinctrl_pm_select_sleep_state(component->dev); 705 706 return 0; 707 } 708 709 /* 710 * Called by ALSA when a PCM substream is closed. Private data can be 711 * freed here. The cpu DAI, codec DAI, machine and components are also 712 * shutdown. 713 */ 714 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd, 715 struct snd_pcm_substream *substream) 716 { 717 return soc_pcm_clean(rtd, substream, 0); 718 } 719 720 /* PCM close ops for non-DPCM streams */ 721 static int soc_pcm_close(struct snd_pcm_substream *substream) 722 { 723 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 724 725 snd_soc_dpcm_mutex_lock(rtd); 726 soc_pcm_clean(rtd, substream, 0); 727 snd_soc_dpcm_mutex_unlock(rtd); 728 return 0; 729 } 730 731 static int soc_hw_sanity_check(struct snd_pcm_substream *substream) 732 { 733 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 734 struct snd_pcm_hardware *hw = &substream->runtime->hw; 735 const char *name_cpu = soc_cpu_dai_name(rtd); 736 const char *name_codec = soc_codec_dai_name(rtd); 737 const char *err_msg; 738 struct device *dev = rtd->dev; 739 740 err_msg = "rates"; 741 if (!hw->rates) 742 goto config_err; 743 744 err_msg = "formats"; 745 if (!hw->formats) 746 goto config_err; 747 748 err_msg = "channels"; 749 if (!hw->channels_min || !hw->channels_max || 750 hw->channels_min > hw->channels_max) 751 goto config_err; 752 753 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec, 754 name_cpu); 755 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates); 756 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min, 757 hw->channels_max); 758 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min, 759 hw->rate_max); 760 761 return 0; 762 763 config_err: 764 dev_err(dev, "ASoC: %s <-> %s No matching %s\n", 765 name_codec, name_cpu, err_msg); 766 return -EINVAL; 767 } 768 769 /* 770 * Called by ALSA when a PCM substream is opened, the runtime->hw record is 771 * then initialized and any private data can be allocated. This also calls 772 * startup for the cpu DAI, component, machine and codec DAI. 773 */ 774 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd, 775 struct snd_pcm_substream *substream) 776 { 777 struct snd_soc_component *component; 778 struct snd_soc_dai *dai; 779 int i, ret = 0; 780 781 snd_soc_dpcm_mutex_assert_held(rtd); 782 783 for_each_rtd_components(rtd, i, component) 784 pinctrl_pm_select_default_state(component->dev); 785 786 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream); 787 if (ret < 0) 788 goto err; 789 790 ret = soc_pcm_components_open(substream); 791 if (ret < 0) 792 goto err; 793 794 ret = snd_soc_link_startup(substream); 795 if (ret < 0) 796 goto err; 797 798 /* startup the audio subsystem */ 799 for_each_rtd_dais(rtd, i, dai) { 800 ret = snd_soc_dai_startup(dai, substream); 801 if (ret < 0) 802 goto err; 803 804 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 805 dai->tx_mask = 0; 806 else 807 dai->rx_mask = 0; 808 } 809 810 /* Dynamic PCM DAI links compat checks use dynamic capabilities */ 811 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) 812 goto dynamic; 813 814 /* Check that the codec and cpu DAIs are compatible */ 815 soc_pcm_init_runtime_hw(substream); 816 817 soc_pcm_update_symmetry(substream); 818 819 ret = soc_hw_sanity_check(substream); 820 if (ret < 0) 821 goto err; 822 823 soc_pcm_apply_msb(substream); 824 825 /* Symmetry only applies if we've already got an active stream. */ 826 for_each_rtd_dais(rtd, i, dai) { 827 ret = soc_pcm_apply_symmetry(substream, dai); 828 if (ret != 0) 829 goto err; 830 } 831 dynamic: 832 snd_soc_runtime_activate(rtd, substream->stream); 833 ret = 0; 834 err: 835 if (ret < 0) { 836 soc_pcm_clean(rtd, substream, 1); 837 dev_err(rtd->dev, "%s() failed (%d)", __func__, ret); 838 } 839 840 return ret; 841 } 842 843 /* PCM open ops for non-DPCM streams */ 844 static int soc_pcm_open(struct snd_pcm_substream *substream) 845 { 846 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 847 int ret; 848 849 snd_soc_dpcm_mutex_lock(rtd); 850 ret = __soc_pcm_open(rtd, substream); 851 snd_soc_dpcm_mutex_unlock(rtd); 852 return ret; 853 } 854 855 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd) 856 { 857 /* 858 * Currently nothing to do for c2c links 859 * Since c2c links are internal nodes in the DAPM graph and 860 * don't interface with the outside world or application layer 861 * we don't have to do any special handling on close. 862 */ 863 } 864 865 /* 866 * Called by ALSA when the PCM substream is prepared, can set format, sample 867 * rate, etc. This function is non atomic and can be called multiple times, 868 * it can refer to the runtime info. 869 */ 870 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd, 871 struct snd_pcm_substream *substream) 872 { 873 struct snd_soc_dai *dai; 874 int i, ret = 0; 875 876 snd_soc_dpcm_mutex_assert_held(rtd); 877 878 ret = snd_soc_link_prepare(substream); 879 if (ret < 0) 880 goto out; 881 882 ret = snd_soc_pcm_component_prepare(substream); 883 if (ret < 0) 884 goto out; 885 886 ret = snd_soc_pcm_dai_prepare(substream); 887 if (ret < 0) 888 goto out; 889 890 /* cancel any delayed stream shutdown that is pending */ 891 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 892 rtd->pop_wait) { 893 rtd->pop_wait = 0; 894 cancel_delayed_work(&rtd->delayed_work); 895 } 896 897 snd_soc_dapm_stream_event(rtd, substream->stream, 898 SND_SOC_DAPM_STREAM_START); 899 900 for_each_rtd_dais(rtd, i, dai) 901 snd_soc_dai_digital_mute(dai, 0, substream->stream); 902 903 out: 904 if (ret < 0) 905 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 906 907 return ret; 908 } 909 910 /* PCM prepare ops for non-DPCM streams */ 911 static int soc_pcm_prepare(struct snd_pcm_substream *substream) 912 { 913 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 914 int ret; 915 916 snd_soc_dpcm_mutex_lock(rtd); 917 ret = __soc_pcm_prepare(rtd, substream); 918 snd_soc_dpcm_mutex_unlock(rtd); 919 return ret; 920 } 921 922 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params, 923 unsigned int mask) 924 { 925 struct snd_interval *interval; 926 int channels = hweight_long(mask); 927 928 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 929 interval->min = channels; 930 interval->max = channels; 931 } 932 933 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd, 934 struct snd_pcm_substream *substream, int rollback) 935 { 936 struct snd_soc_dai *dai; 937 int i; 938 939 snd_soc_dpcm_mutex_assert_held(rtd); 940 941 /* clear the corresponding DAIs parameters when going to be inactive */ 942 for_each_rtd_dais(rtd, i, dai) { 943 if (snd_soc_dai_active(dai) == 1) 944 soc_pcm_set_dai_params(dai, NULL); 945 946 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) 947 snd_soc_dai_digital_mute(dai, 1, substream->stream); 948 } 949 950 /* run the stream event */ 951 snd_soc_dapm_stream_stop(rtd, substream->stream); 952 953 /* free any machine hw params */ 954 snd_soc_link_hw_free(substream, rollback); 955 956 /* free any component resources */ 957 snd_soc_pcm_component_hw_free(substream, rollback); 958 959 /* now free hw params for the DAIs */ 960 for_each_rtd_dais(rtd, i, dai) 961 if (snd_soc_dai_stream_valid(dai, substream->stream)) 962 snd_soc_dai_hw_free(dai, substream, rollback); 963 964 return 0; 965 } 966 967 /* 968 * Frees resources allocated by hw_params, can be called multiple times 969 */ 970 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd, 971 struct snd_pcm_substream *substream) 972 { 973 return soc_pcm_hw_clean(rtd, substream, 0); 974 } 975 976 /* hw_free PCM ops for non-DPCM streams */ 977 static int soc_pcm_hw_free(struct snd_pcm_substream *substream) 978 { 979 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 980 int ret; 981 982 snd_soc_dpcm_mutex_lock(rtd); 983 ret = __soc_pcm_hw_free(rtd, substream); 984 snd_soc_dpcm_mutex_unlock(rtd); 985 return ret; 986 } 987 988 /* 989 * Called by ALSA when the hardware params are set by application. This 990 * function can also be called multiple times and can allocate buffers 991 * (using snd_pcm_lib_* ). It's non-atomic. 992 */ 993 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd, 994 struct snd_pcm_substream *substream, 995 struct snd_pcm_hw_params *params) 996 { 997 struct snd_soc_dai *cpu_dai; 998 struct snd_soc_dai *codec_dai; 999 int i, ret = 0; 1000 1001 snd_soc_dpcm_mutex_assert_held(rtd); 1002 1003 ret = soc_pcm_params_symmetry(substream, params); 1004 if (ret) 1005 goto out; 1006 1007 ret = snd_soc_link_hw_params(substream, params); 1008 if (ret < 0) 1009 goto out; 1010 1011 for_each_rtd_codec_dais(rtd, i, codec_dai) { 1012 struct snd_pcm_hw_params codec_params; 1013 1014 /* 1015 * Skip CODECs which don't support the current stream type, 1016 * the idea being that if a CODEC is not used for the currently 1017 * set up transfer direction, it should not need to be 1018 * configured, especially since the configuration used might 1019 * not even be supported by that CODEC. There may be cases 1020 * however where a CODEC needs to be set up although it is 1021 * actually not being used for the transfer, e.g. if a 1022 * capture-only CODEC is acting as an LRCLK and/or BCLK master 1023 * for the DAI link including a playback-only CODEC. 1024 * If this becomes necessary, we will have to augment the 1025 * machine driver setup with information on how to act, so 1026 * we can do the right thing here. 1027 */ 1028 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream)) 1029 continue; 1030 1031 /* copy params for each codec */ 1032 codec_params = *params; 1033 1034 /* fixup params based on TDM slot masks */ 1035 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1036 codec_dai->tx_mask) 1037 soc_pcm_codec_params_fixup(&codec_params, 1038 codec_dai->tx_mask); 1039 1040 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 1041 codec_dai->rx_mask) 1042 soc_pcm_codec_params_fixup(&codec_params, 1043 codec_dai->rx_mask); 1044 1045 ret = snd_soc_dai_hw_params(codec_dai, substream, 1046 &codec_params); 1047 if(ret < 0) 1048 goto out; 1049 1050 soc_pcm_set_dai_params(codec_dai, &codec_params); 1051 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai); 1052 } 1053 1054 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 1055 /* 1056 * Skip CPUs which don't support the current stream 1057 * type. See soc_pcm_init_runtime_hw() for more details 1058 */ 1059 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream)) 1060 continue; 1061 1062 ret = snd_soc_dai_hw_params(cpu_dai, substream, params); 1063 if (ret < 0) 1064 goto out; 1065 1066 /* store the parameters for each DAI */ 1067 soc_pcm_set_dai_params(cpu_dai, params); 1068 snd_soc_dapm_update_dai(substream, params, cpu_dai); 1069 } 1070 1071 ret = snd_soc_pcm_component_hw_params(substream, params); 1072 out: 1073 if (ret < 0) { 1074 soc_pcm_hw_clean(rtd, substream, 1); 1075 dev_err(rtd->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 1076 } 1077 1078 return ret; 1079 } 1080 1081 /* hw_params PCM ops for non-DPCM streams */ 1082 static int soc_pcm_hw_params(struct snd_pcm_substream *substream, 1083 struct snd_pcm_hw_params *params) 1084 { 1085 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1086 int ret; 1087 1088 snd_soc_dpcm_mutex_lock(rtd); 1089 ret = __soc_pcm_hw_params(rtd, substream, params); 1090 snd_soc_dpcm_mutex_unlock(rtd); 1091 return ret; 1092 } 1093 1094 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 1095 { 1096 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 1097 int ret = -EINVAL, _ret = 0; 1098 int rollback = 0; 1099 1100 switch (cmd) { 1101 case SNDRV_PCM_TRIGGER_START: 1102 case SNDRV_PCM_TRIGGER_RESUME: 1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1104 ret = snd_soc_link_trigger(substream, cmd, 0); 1105 if (ret < 0) 1106 goto start_err; 1107 1108 ret = snd_soc_pcm_component_trigger(substream, cmd, 0); 1109 if (ret < 0) 1110 goto start_err; 1111 1112 ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); 1113 start_err: 1114 if (ret < 0) 1115 rollback = 1; 1116 } 1117 1118 if (rollback) { 1119 _ret = ret; 1120 switch (cmd) { 1121 case SNDRV_PCM_TRIGGER_START: 1122 cmd = SNDRV_PCM_TRIGGER_STOP; 1123 break; 1124 case SNDRV_PCM_TRIGGER_RESUME: 1125 cmd = SNDRV_PCM_TRIGGER_SUSPEND; 1126 break; 1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1128 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH; 1129 break; 1130 } 1131 } 1132 1133 switch (cmd) { 1134 case SNDRV_PCM_TRIGGER_STOP: 1135 case SNDRV_PCM_TRIGGER_SUSPEND: 1136 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1137 if (rtd->dai_link->stop_dma_first) { 1138 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1139 if (ret < 0) 1140 break; 1141 1142 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1143 if (ret < 0) 1144 break; 1145 } else { 1146 ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback); 1147 if (ret < 0) 1148 break; 1149 1150 ret = snd_soc_pcm_component_trigger(substream, cmd, rollback); 1151 if (ret < 0) 1152 break; 1153 } 1154 ret = snd_soc_link_trigger(substream, cmd, rollback); 1155 break; 1156 } 1157 1158 if (_ret) 1159 ret = _ret; 1160 1161 return ret; 1162 } 1163 1164 /* 1165 * soc level wrapper for pointer callback 1166 * If cpu_dai, codec_dai, component driver has the delay callback, then 1167 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay(). 1168 */ 1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_uframes_t offset = 0; 1173 snd_pcm_sframes_t codec_delay = 0; 1174 snd_pcm_sframes_t cpu_delay = 0; 1175 1176 offset = snd_soc_pcm_component_pointer(substream); 1177 1178 /* should be called *after* snd_soc_pcm_component_pointer() */ 1179 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay); 1180 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay); 1181 1182 runtime->delay = cpu_delay + codec_delay; 1183 1184 return offset; 1185 } 1186 1187 /* connect a FE and BE */ 1188 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, 1189 struct snd_soc_pcm_runtime *be, int stream) 1190 { 1191 struct snd_pcm_substream *fe_substream; 1192 struct snd_pcm_substream *be_substream; 1193 struct snd_soc_dpcm *dpcm; 1194 1195 snd_soc_dpcm_mutex_assert_held(fe); 1196 1197 /* only add new dpcms */ 1198 for_each_dpcm_be(fe, stream, dpcm) { 1199 if (dpcm->be == be && dpcm->fe == fe) 1200 return 0; 1201 } 1202 1203 fe_substream = snd_soc_dpcm_get_substream(fe, stream); 1204 be_substream = snd_soc_dpcm_get_substream(be, stream); 1205 1206 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) { 1207 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n", 1208 __func__); 1209 return -EINVAL; 1210 } 1211 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) { 1212 dev_warn(be->dev, "%s: FE is nonatomic but BE is not, forcing BE as nonatomic\n", 1213 __func__); 1214 be_substream->pcm->nonatomic = 1; 1215 } 1216 1217 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); 1218 if (!dpcm) 1219 return -ENOMEM; 1220 1221 dpcm->be = be; 1222 dpcm->fe = fe; 1223 be->dpcm[stream].runtime = fe->dpcm[stream].runtime; 1224 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; 1225 snd_soc_dpcm_stream_lock_irq(fe, stream); 1226 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); 1227 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); 1228 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1229 1230 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", 1231 stream ? "capture" : "playback", fe->dai_link->name, 1232 stream ? "<-" : "->", be->dai_link->name); 1233 1234 dpcm_create_debugfs_state(dpcm, stream); 1235 1236 return 1; 1237 } 1238 1239 /* reparent a BE onto another FE */ 1240 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, 1241 struct snd_soc_pcm_runtime *be, int stream) 1242 { 1243 struct snd_soc_dpcm *dpcm; 1244 struct snd_pcm_substream *fe_substream, *be_substream; 1245 1246 /* reparent if BE is connected to other FEs */ 1247 if (!be->dpcm[stream].users) 1248 return; 1249 1250 be_substream = snd_soc_dpcm_get_substream(be, stream); 1251 1252 for_each_dpcm_fe(be, stream, dpcm) { 1253 if (dpcm->fe == fe) 1254 continue; 1255 1256 dev_dbg(fe->dev, "reparent %s path %s %s %s\n", 1257 stream ? "capture" : "playback", 1258 dpcm->fe->dai_link->name, 1259 stream ? "<-" : "->", dpcm->be->dai_link->name); 1260 1261 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); 1262 be_substream->runtime = fe_substream->runtime; 1263 break; 1264 } 1265 } 1266 1267 /* disconnect a BE and FE */ 1268 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) 1269 { 1270 struct snd_soc_dpcm *dpcm, *d; 1271 LIST_HEAD(deleted_dpcms); 1272 1273 snd_soc_dpcm_mutex_assert_held(fe); 1274 1275 snd_soc_dpcm_stream_lock_irq(fe, stream); 1276 for_each_dpcm_be_safe(fe, stream, dpcm, d) { 1277 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", 1278 stream ? "capture" : "playback", 1279 dpcm->be->dai_link->name); 1280 1281 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) 1282 continue; 1283 1284 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", 1285 stream ? "capture" : "playback", fe->dai_link->name, 1286 stream ? "<-" : "->", dpcm->be->dai_link->name); 1287 1288 /* BEs still alive need new FE */ 1289 dpcm_be_reparent(fe, dpcm->be, stream); 1290 1291 list_del(&dpcm->list_be); 1292 list_move(&dpcm->list_fe, &deleted_dpcms); 1293 } 1294 snd_soc_dpcm_stream_unlock_irq(fe, stream); 1295 1296 while (!list_empty(&deleted_dpcms)) { 1297 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm, 1298 list_fe); 1299 list_del(&dpcm->list_fe); 1300 dpcm_remove_debugfs_state(dpcm); 1301 kfree(dpcm); 1302 } 1303 } 1304 1305 /* get BE for DAI widget and stream */ 1306 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, 1307 struct snd_soc_dapm_widget *widget, int stream) 1308 { 1309 struct snd_soc_pcm_runtime *be; 1310 struct snd_soc_dapm_widget *w; 1311 struct snd_soc_dai *dai; 1312 int i; 1313 1314 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name); 1315 1316 for_each_card_rtds(card, be) { 1317 1318 if (!be->dai_link->no_pcm) 1319 continue; 1320 1321 for_each_rtd_dais(be, i, dai) { 1322 w = snd_soc_dai_get_widget(dai, stream); 1323 1324 dev_dbg(card->dev, "ASoC: try BE : %s\n", 1325 w ? w->name : "(not set)"); 1326 1327 if (w == widget) 1328 return be; 1329 } 1330 } 1331 1332 /* Widget provided is not a BE */ 1333 return NULL; 1334 } 1335 1336 static int widget_in_list(struct snd_soc_dapm_widget_list *list, 1337 struct snd_soc_dapm_widget *widget) 1338 { 1339 struct snd_soc_dapm_widget *w; 1340 int i; 1341 1342 for_each_dapm_widgets(list, i, w) 1343 if (widget == w) 1344 return 1; 1345 1346 return 0; 1347 } 1348 1349 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir) 1350 { 1351 struct snd_soc_card *card = widget->dapm->card; 1352 struct snd_soc_pcm_runtime *rtd; 1353 int stream; 1354 1355 /* adjust dir to stream */ 1356 if (dir == SND_SOC_DAPM_DIR_OUT) 1357 stream = SNDRV_PCM_STREAM_PLAYBACK; 1358 else 1359 stream = SNDRV_PCM_STREAM_CAPTURE; 1360 1361 rtd = dpcm_get_be(card, widget, stream); 1362 if (rtd) 1363 return true; 1364 1365 return false; 1366 } 1367 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be); 1368 1369 int dpcm_path_get(struct snd_soc_pcm_runtime *fe, 1370 int stream, struct snd_soc_dapm_widget_list **list) 1371 { 1372 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); 1373 int paths; 1374 1375 if (fe->num_cpus > 1) { 1376 dev_err(fe->dev, 1377 "%s doesn't support Multi CPU yet\n", __func__); 1378 return -EINVAL; 1379 } 1380 1381 /* get number of valid DAI paths and their widgets */ 1382 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, 1383 fe->card->component_chaining ? 1384 NULL : dpcm_end_walk_at_be); 1385 1386 if (paths > 0) 1387 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, 1388 stream ? "capture" : "playback"); 1389 else if (paths == 0) 1390 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name, 1391 stream ? "capture" : "playback"); 1392 1393 return paths; 1394 } 1395 1396 void dpcm_path_put(struct snd_soc_dapm_widget_list **list) 1397 { 1398 snd_soc_dapm_dai_free_widgets(list); 1399 } 1400 1401 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream, 1402 struct snd_soc_dapm_widget_list *list) 1403 { 1404 struct snd_soc_dai *dai; 1405 unsigned int i; 1406 1407 /* is there a valid DAI widget for this BE */ 1408 for_each_rtd_dais(dpcm->be, i, dai) { 1409 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream); 1410 1411 /* 1412 * The BE is pruned only if none of the dai 1413 * widgets are in the active list. 1414 */ 1415 if (widget && widget_in_list(list, widget)) 1416 return true; 1417 } 1418 1419 return false; 1420 } 1421 1422 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, 1423 struct snd_soc_dapm_widget_list **list_) 1424 { 1425 struct snd_soc_dpcm *dpcm; 1426 int prune = 0; 1427 1428 /* Destroy any old FE <--> BE connections */ 1429 for_each_dpcm_be(fe, stream, dpcm) { 1430 if (dpcm_be_is_active(dpcm, stream, *list_)) 1431 continue; 1432 1433 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", 1434 stream ? "capture" : "playback", 1435 dpcm->be->dai_link->name, fe->dai_link->name); 1436 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 1437 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE); 1438 prune++; 1439 } 1440 1441 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); 1442 return prune; 1443 } 1444 1445 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, 1446 struct snd_soc_dapm_widget_list **list_) 1447 { 1448 struct snd_soc_card *card = fe->card; 1449 struct snd_soc_dapm_widget_list *list = *list_; 1450 struct snd_soc_pcm_runtime *be; 1451 struct snd_soc_dapm_widget *widget; 1452 int i, new = 0, err; 1453 1454 /* Create any new FE <--> BE connections */ 1455 for_each_dapm_widgets(list, i, widget) { 1456 1457 switch (widget->id) { 1458 case snd_soc_dapm_dai_in: 1459 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 1460 continue; 1461 break; 1462 case snd_soc_dapm_dai_out: 1463 if (stream != SNDRV_PCM_STREAM_CAPTURE) 1464 continue; 1465 break; 1466 default: 1467 continue; 1468 } 1469 1470 /* is there a valid BE rtd for this widget */ 1471 be = dpcm_get_be(card, widget, stream); 1472 if (!be) { 1473 dev_dbg(fe->dev, "ASoC: no BE found for %s\n", 1474 widget->name); 1475 continue; 1476 } 1477 1478 /* don't connect if FE is not running */ 1479 if (!fe->dpcm[stream].runtime && !fe->fe_compr) 1480 continue; 1481 1482 /* 1483 * Filter for systems with 'component_chaining' enabled. 1484 * This helps to avoid unnecessary re-configuration of an 1485 * already active BE on such systems. 1486 */ 1487 if (fe->card->component_chaining && 1488 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1489 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1490 continue; 1491 1492 /* newly connected FE and BE */ 1493 err = dpcm_be_connect(fe, be, stream); 1494 if (err < 0) { 1495 dev_err(fe->dev, "ASoC: can't connect %s\n", 1496 widget->name); 1497 break; 1498 } else if (err == 0) /* already connected */ 1499 continue; 1500 1501 /* new */ 1502 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE); 1503 new++; 1504 } 1505 1506 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); 1507 return new; 1508 } 1509 1510 /* 1511 * Find the corresponding BE DAIs that source or sink audio to this 1512 * FE substream. 1513 */ 1514 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, 1515 int stream, struct snd_soc_dapm_widget_list **list, int new) 1516 { 1517 if (new) 1518 return dpcm_add_paths(fe, stream, list); 1519 else 1520 return dpcm_prune_paths(fe, stream, list); 1521 } 1522 1523 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) 1524 { 1525 struct snd_soc_dpcm *dpcm; 1526 1527 for_each_dpcm_be(fe, stream, dpcm) 1528 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO); 1529 } 1530 1531 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream, 1532 int do_hw_free, struct snd_soc_dpcm *last) 1533 { 1534 struct snd_soc_dpcm *dpcm; 1535 1536 /* disable any enabled and non active backends */ 1537 for_each_dpcm_be(fe, stream, dpcm) { 1538 struct snd_soc_pcm_runtime *be = dpcm->be; 1539 struct snd_pcm_substream *be_substream = 1540 snd_soc_dpcm_get_substream(be, stream); 1541 1542 if (dpcm == last) 1543 return; 1544 1545 /* is this op for this BE ? */ 1546 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1547 continue; 1548 1549 if (be->dpcm[stream].users == 0) { 1550 dev_err(be->dev, "ASoC: no users %s at close - state %d\n", 1551 stream ? "capture" : "playback", 1552 be->dpcm[stream].state); 1553 continue; 1554 } 1555 1556 if (--be->dpcm[stream].users != 0) 1557 continue; 1558 1559 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) { 1560 if (!do_hw_free) 1561 continue; 1562 1563 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) { 1564 __soc_pcm_hw_free(be, be_substream); 1565 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1566 } 1567 } 1568 1569 __soc_pcm_close(be, be_substream); 1570 be_substream->runtime = NULL; 1571 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1572 } 1573 } 1574 1575 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) 1576 { 1577 struct snd_soc_pcm_runtime *be; 1578 struct snd_soc_dpcm *dpcm; 1579 int err, count = 0; 1580 1581 /* only startup BE DAIs that are either sinks or sources to this FE DAI */ 1582 for_each_dpcm_be(fe, stream, dpcm) { 1583 struct snd_pcm_substream *be_substream; 1584 1585 be = dpcm->be; 1586 be_substream = snd_soc_dpcm_get_substream(be, stream); 1587 1588 if (!be_substream) { 1589 dev_err(be->dev, "ASoC: no backend %s stream\n", 1590 stream ? "capture" : "playback"); 1591 continue; 1592 } 1593 1594 /* is this op for this BE ? */ 1595 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1596 continue; 1597 1598 /* first time the dpcm is open ? */ 1599 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) { 1600 dev_err(be->dev, "ASoC: too many users %s at open %d\n", 1601 stream ? "capture" : "playback", 1602 be->dpcm[stream].state); 1603 continue; 1604 } 1605 1606 if (be->dpcm[stream].users++ != 0) 1607 continue; 1608 1609 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && 1610 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) 1611 continue; 1612 1613 dev_dbg(be->dev, "ASoC: open %s BE %s\n", 1614 stream ? "capture" : "playback", be->dai_link->name); 1615 1616 be_substream->runtime = be->dpcm[stream].runtime; 1617 err = __soc_pcm_open(be, be_substream); 1618 if (err < 0) { 1619 be->dpcm[stream].users--; 1620 if (be->dpcm[stream].users < 0) 1621 dev_err(be->dev, "ASoC: no users %s at unwind %d\n", 1622 stream ? "capture" : "playback", 1623 be->dpcm[stream].state); 1624 1625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1626 goto unwind; 1627 } 1628 be->dpcm[stream].be_start = 0; 1629 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1630 count++; 1631 } 1632 1633 return count; 1634 1635 unwind: 1636 dpcm_be_dai_startup_rollback(fe, stream, dpcm); 1637 1638 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 1639 __func__, be->dai_link->name, err); 1640 1641 return err; 1642 } 1643 1644 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream) 1645 { 1646 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1647 struct snd_pcm_runtime *runtime = substream->runtime; 1648 struct snd_pcm_hardware *hw = &runtime->hw; 1649 struct snd_soc_dai *dai; 1650 int stream = substream->stream; 1651 int i; 1652 1653 soc_pcm_hw_init(hw); 1654 1655 for_each_rtd_cpu_dais(fe, i, dai) { 1656 struct snd_soc_pcm_stream *cpu_stream; 1657 1658 /* 1659 * Skip CPUs which don't support the current stream 1660 * type. See soc_pcm_init_runtime_hw() for more details 1661 */ 1662 if (!snd_soc_dai_stream_valid(dai, stream)) 1663 continue; 1664 1665 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1666 1667 soc_pcm_hw_update_rate(hw, cpu_stream); 1668 soc_pcm_hw_update_chan(hw, cpu_stream); 1669 soc_pcm_hw_update_format(hw, cpu_stream); 1670 } 1671 1672 } 1673 1674 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream) 1675 { 1676 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1677 struct snd_pcm_runtime *runtime = substream->runtime; 1678 struct snd_pcm_hardware *hw = &runtime->hw; 1679 struct snd_soc_dpcm *dpcm; 1680 struct snd_soc_dai *dai; 1681 int stream = substream->stream; 1682 1683 if (!fe->dai_link->dpcm_merged_format) 1684 return; 1685 1686 /* 1687 * It returns merged BE codec format 1688 * if FE want to use it (= dpcm_merged_format) 1689 */ 1690 1691 for_each_dpcm_be(fe, stream, dpcm) { 1692 struct snd_soc_pcm_runtime *be = dpcm->be; 1693 struct snd_soc_pcm_stream *codec_stream; 1694 int i; 1695 1696 for_each_rtd_codec_dais(be, i, dai) { 1697 /* 1698 * Skip CODECs which don't support the current stream 1699 * type. See soc_pcm_init_runtime_hw() for more details 1700 */ 1701 if (!snd_soc_dai_stream_valid(dai, stream)) 1702 continue; 1703 1704 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1705 1706 soc_pcm_hw_update_format(hw, codec_stream); 1707 } 1708 } 1709 } 1710 1711 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream) 1712 { 1713 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1714 struct snd_pcm_runtime *runtime = substream->runtime; 1715 struct snd_pcm_hardware *hw = &runtime->hw; 1716 struct snd_soc_dpcm *dpcm; 1717 int stream = substream->stream; 1718 1719 if (!fe->dai_link->dpcm_merged_chan) 1720 return; 1721 1722 /* 1723 * It returns merged BE codec channel; 1724 * if FE want to use it (= dpcm_merged_chan) 1725 */ 1726 1727 for_each_dpcm_be(fe, stream, dpcm) { 1728 struct snd_soc_pcm_runtime *be = dpcm->be; 1729 struct snd_soc_pcm_stream *cpu_stream; 1730 struct snd_soc_dai *dai; 1731 int i; 1732 1733 for_each_rtd_cpu_dais(be, i, dai) { 1734 /* 1735 * Skip CPUs which don't support the current stream 1736 * type. See soc_pcm_init_runtime_hw() for more details 1737 */ 1738 if (!snd_soc_dai_stream_valid(dai, stream)) 1739 continue; 1740 1741 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream); 1742 1743 soc_pcm_hw_update_chan(hw, cpu_stream); 1744 } 1745 1746 /* 1747 * chan min/max cannot be enforced if there are multiple CODEC 1748 * DAIs connected to a single CPU DAI, use CPU DAI's directly 1749 */ 1750 if (be->num_codecs == 1) { 1751 struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream( 1752 asoc_rtd_to_codec(be, 0), stream); 1753 1754 soc_pcm_hw_update_chan(hw, codec_stream); 1755 } 1756 } 1757 } 1758 1759 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream) 1760 { 1761 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1762 struct snd_pcm_runtime *runtime = substream->runtime; 1763 struct snd_pcm_hardware *hw = &runtime->hw; 1764 struct snd_soc_dpcm *dpcm; 1765 int stream = substream->stream; 1766 1767 if (!fe->dai_link->dpcm_merged_rate) 1768 return; 1769 1770 /* 1771 * It returns merged BE codec channel; 1772 * if FE want to use it (= dpcm_merged_chan) 1773 */ 1774 1775 for_each_dpcm_be(fe, stream, dpcm) { 1776 struct snd_soc_pcm_runtime *be = dpcm->be; 1777 struct snd_soc_pcm_stream *pcm; 1778 struct snd_soc_dai *dai; 1779 int i; 1780 1781 for_each_rtd_dais(be, i, dai) { 1782 /* 1783 * Skip DAIs which don't support the current stream 1784 * type. See soc_pcm_init_runtime_hw() for more details 1785 */ 1786 if (!snd_soc_dai_stream_valid(dai, stream)) 1787 continue; 1788 1789 pcm = snd_soc_dai_get_pcm_stream(dai, stream); 1790 1791 soc_pcm_hw_update_rate(hw, pcm); 1792 } 1793 } 1794 } 1795 1796 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream, 1797 int stream) 1798 { 1799 struct snd_soc_dpcm *dpcm; 1800 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1801 struct snd_soc_dai *fe_cpu_dai; 1802 int err = 0; 1803 int i; 1804 1805 /* apply symmetry for FE */ 1806 soc_pcm_update_symmetry(fe_substream); 1807 1808 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) { 1809 /* Symmetry only applies if we've got an active stream. */ 1810 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai); 1811 if (err < 0) 1812 goto error; 1813 } 1814 1815 /* apply symmetry for BE */ 1816 for_each_dpcm_be(fe, stream, dpcm) { 1817 struct snd_soc_pcm_runtime *be = dpcm->be; 1818 struct snd_pcm_substream *be_substream = 1819 snd_soc_dpcm_get_substream(be, stream); 1820 struct snd_soc_pcm_runtime *rtd; 1821 struct snd_soc_dai *dai; 1822 1823 /* A backend may not have the requested substream */ 1824 if (!be_substream) 1825 continue; 1826 1827 rtd = asoc_substream_to_rtd(be_substream); 1828 if (rtd->dai_link->be_hw_params_fixup) 1829 continue; 1830 1831 soc_pcm_update_symmetry(be_substream); 1832 1833 /* Symmetry only applies if we've got an active stream. */ 1834 for_each_rtd_dais(rtd, i, dai) { 1835 err = soc_pcm_apply_symmetry(fe_substream, dai); 1836 if (err < 0) 1837 goto error; 1838 } 1839 } 1840 error: 1841 if (err < 0) 1842 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, err); 1843 1844 return err; 1845 } 1846 1847 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) 1848 { 1849 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 1850 int stream = fe_substream->stream, ret = 0; 1851 1852 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1853 1854 ret = dpcm_be_dai_startup(fe, stream); 1855 if (ret < 0) 1856 goto be_err; 1857 1858 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); 1859 1860 /* start the DAI frontend */ 1861 ret = __soc_pcm_open(fe, fe_substream); 1862 if (ret < 0) 1863 goto unwind; 1864 1865 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; 1866 1867 dpcm_runtime_setup_fe(fe_substream); 1868 1869 dpcm_runtime_setup_be_format(fe_substream); 1870 dpcm_runtime_setup_be_chan(fe_substream); 1871 dpcm_runtime_setup_be_rate(fe_substream); 1872 1873 ret = dpcm_apply_symmetry(fe_substream, stream); 1874 1875 unwind: 1876 if (ret < 0) 1877 dpcm_be_dai_startup_unwind(fe, stream); 1878 be_err: 1879 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1880 1881 if (ret < 0) 1882 dev_err(fe->dev, "%s() failed (%d)\n", __func__, ret); 1883 1884 return ret; 1885 } 1886 1887 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) 1888 { 1889 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1890 int stream = substream->stream; 1891 1892 snd_soc_dpcm_mutex_assert_held(fe); 1893 1894 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1895 1896 /* shutdown the BEs */ 1897 dpcm_be_dai_shutdown(fe, stream); 1898 1899 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); 1900 1901 /* now shutdown the frontend */ 1902 __soc_pcm_close(fe, substream); 1903 1904 /* run the stream stop event */ 1905 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); 1906 1907 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; 1908 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1909 return 0; 1910 } 1911 1912 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) 1913 { 1914 struct snd_soc_dpcm *dpcm; 1915 1916 /* only hw_params backends that are either sinks or sources 1917 * to this frontend DAI */ 1918 for_each_dpcm_be(fe, stream, dpcm) { 1919 1920 struct snd_soc_pcm_runtime *be = dpcm->be; 1921 struct snd_pcm_substream *be_substream = 1922 snd_soc_dpcm_get_substream(be, stream); 1923 1924 /* is this op for this BE ? */ 1925 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1926 continue; 1927 1928 /* only free hw when no longer used - check all FEs */ 1929 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 1930 continue; 1931 1932 /* do not free hw if this BE is used by other FE */ 1933 if (be->dpcm[stream].users > 1) 1934 continue; 1935 1936 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 1938 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 1939 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && 1940 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 1941 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 1942 continue; 1943 1944 dev_dbg(be->dev, "ASoC: hw_free BE %s\n", 1945 be->dai_link->name); 1946 1947 __soc_pcm_hw_free(be, be_substream); 1948 1949 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1950 } 1951 } 1952 1953 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) 1954 { 1955 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 1956 int stream = substream->stream; 1957 1958 snd_soc_dpcm_mutex_lock(fe); 1959 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 1960 1961 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); 1962 1963 /* call hw_free on the frontend */ 1964 soc_pcm_hw_clean(fe, substream, 0); 1965 1966 /* only hw_params backends that are either sinks or sources 1967 * to this frontend DAI */ 1968 dpcm_be_dai_hw_free(fe, stream); 1969 1970 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; 1971 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 1972 1973 snd_soc_dpcm_mutex_unlock(fe); 1974 return 0; 1975 } 1976 1977 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) 1978 { 1979 struct snd_soc_pcm_runtime *be; 1980 struct snd_pcm_substream *be_substream; 1981 struct snd_soc_dpcm *dpcm; 1982 int ret; 1983 1984 for_each_dpcm_be(fe, stream, dpcm) { 1985 be = dpcm->be; 1986 be_substream = snd_soc_dpcm_get_substream(be, stream); 1987 1988 /* is this op for this BE ? */ 1989 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 1990 continue; 1991 1992 /* copy params for each dpcm */ 1993 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, 1994 sizeof(struct snd_pcm_hw_params)); 1995 1996 /* perform any hw_params fixups */ 1997 ret = snd_soc_link_be_hw_params_fixup(be, &dpcm->hw_params); 1998 if (ret < 0) 1999 goto unwind; 2000 2001 /* copy the fixed-up hw params for BE dai */ 2002 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params, 2003 sizeof(struct snd_pcm_hw_params)); 2004 2005 /* only allow hw_params() if no connected FEs are running */ 2006 if (!snd_soc_dpcm_can_be_params(fe, be, stream)) 2007 continue; 2008 2009 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2010 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2011 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) 2012 continue; 2013 2014 dev_dbg(be->dev, "ASoC: hw_params BE %s\n", 2015 be->dai_link->name); 2016 2017 ret = __soc_pcm_hw_params(be, be_substream, &dpcm->hw_params); 2018 if (ret < 0) 2019 goto unwind; 2020 2021 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2022 } 2023 return 0; 2024 2025 unwind: 2026 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2027 __func__, be->dai_link->name, ret); 2028 2029 /* disable any enabled and non active backends */ 2030 for_each_dpcm_be_rollback(fe, stream, dpcm) { 2031 be = dpcm->be; 2032 be_substream = snd_soc_dpcm_get_substream(be, stream); 2033 2034 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2035 continue; 2036 2037 /* only allow hw_free() if no connected FEs are running */ 2038 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) 2039 continue; 2040 2041 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && 2042 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && 2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) 2045 continue; 2046 2047 __soc_pcm_hw_free(be, be_substream); 2048 } 2049 2050 return ret; 2051 } 2052 2053 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, 2054 struct snd_pcm_hw_params *params) 2055 { 2056 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2057 int ret, stream = substream->stream; 2058 2059 snd_soc_dpcm_mutex_lock(fe); 2060 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2061 2062 memcpy(&fe->dpcm[stream].hw_params, params, 2063 sizeof(struct snd_pcm_hw_params)); 2064 ret = dpcm_be_dai_hw_params(fe, stream); 2065 if (ret < 0) 2066 goto out; 2067 2068 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", 2069 fe->dai_link->name, params_rate(params), 2070 params_channels(params), params_format(params)); 2071 2072 /* call hw_params on the frontend */ 2073 ret = __soc_pcm_hw_params(fe, substream, params); 2074 if (ret < 0) 2075 dpcm_be_dai_hw_free(fe, stream); 2076 else 2077 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; 2078 2079 out: 2080 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2081 snd_soc_dpcm_mutex_unlock(fe); 2082 2083 if (ret < 0) 2084 dev_err(fe->dev, "ASoC: %s failed (%d)\n", __func__, ret); 2085 2086 return ret; 2087 } 2088 2089 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, 2090 int cmd) 2091 { 2092 struct snd_soc_pcm_runtime *be; 2093 struct snd_soc_dpcm *dpcm; 2094 unsigned long flags; 2095 int ret = 0; 2096 2097 for_each_dpcm_be(fe, stream, dpcm) { 2098 struct snd_pcm_substream *be_substream; 2099 2100 be = dpcm->be; 2101 be_substream = snd_soc_dpcm_get_substream(be, stream); 2102 2103 snd_soc_dpcm_stream_lock_irqsave_nested(be, stream, flags); 2104 2105 /* is this op for this BE ? */ 2106 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2107 goto next; 2108 2109 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n", 2110 be->dai_link->name, cmd); 2111 2112 switch (cmd) { 2113 case SNDRV_PCM_TRIGGER_START: 2114 if (!be->dpcm[stream].be_start && 2115 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && 2116 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2117 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2118 goto next; 2119 2120 be->dpcm[stream].be_start++; 2121 if (be->dpcm[stream].be_start != 1) 2122 goto next; 2123 2124 ret = soc_pcm_trigger(be_substream, cmd); 2125 if (ret) { 2126 be->dpcm[stream].be_start--; 2127 goto next; 2128 } 2129 2130 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2131 break; 2132 case SNDRV_PCM_TRIGGER_RESUME: 2133 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) 2134 goto next; 2135 2136 be->dpcm[stream].be_start++; 2137 if (be->dpcm[stream].be_start != 1) 2138 goto next; 2139 2140 ret = soc_pcm_trigger(be_substream, cmd); 2141 if (ret) { 2142 be->dpcm[stream].be_start--; 2143 goto next; 2144 } 2145 2146 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2147 break; 2148 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2149 if (!be->dpcm[stream].be_start && 2150 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2151 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2152 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2153 goto next; 2154 2155 be->dpcm[stream].be_start++; 2156 if (be->dpcm[stream].be_start != 1) 2157 goto next; 2158 2159 ret = soc_pcm_trigger(be_substream, cmd); 2160 if (ret) { 2161 be->dpcm[stream].be_start--; 2162 goto next; 2163 } 2164 2165 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2166 break; 2167 case SNDRV_PCM_TRIGGER_STOP: 2168 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) && 2169 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2170 goto next; 2171 2172 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2173 be->dpcm[stream].be_start--; 2174 2175 if (be->dpcm[stream].be_start != 0) 2176 goto next; 2177 2178 ret = soc_pcm_trigger(be_substream, cmd); 2179 if (ret) { 2180 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START) 2181 be->dpcm[stream].be_start++; 2182 goto next; 2183 } 2184 2185 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2186 break; 2187 case SNDRV_PCM_TRIGGER_SUSPEND: 2188 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2189 goto next; 2190 2191 be->dpcm[stream].be_start--; 2192 if (be->dpcm[stream].be_start != 0) 2193 goto next; 2194 2195 ret = soc_pcm_trigger(be_substream, cmd); 2196 if (ret) { 2197 be->dpcm[stream].be_start++; 2198 goto next; 2199 } 2200 2201 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; 2202 break; 2203 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2204 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) 2205 goto next; 2206 2207 be->dpcm[stream].be_start--; 2208 if (be->dpcm[stream].be_start != 0) 2209 goto next; 2210 2211 ret = soc_pcm_trigger(be_substream, cmd); 2212 if (ret) { 2213 be->dpcm[stream].be_start++; 2214 goto next; 2215 } 2216 2217 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2218 break; 2219 } 2220 next: 2221 snd_soc_dpcm_stream_unlock_irqrestore(be, stream, flags); 2222 if (ret) 2223 break; 2224 } 2225 if (ret < 0) 2226 dev_err(fe->dev, "ASoC: %s() failed at %s (%d)\n", 2227 __func__, be->dai_link->name, ret); 2228 return ret; 2229 } 2230 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); 2231 2232 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream, 2233 int cmd, bool fe_first) 2234 { 2235 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2236 int ret; 2237 2238 /* call trigger on the frontend before the backend. */ 2239 if (fe_first) { 2240 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", 2241 fe->dai_link->name, cmd); 2242 2243 ret = soc_pcm_trigger(substream, cmd); 2244 if (ret < 0) 2245 return ret; 2246 2247 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2248 return ret; 2249 } 2250 2251 /* call trigger on the frontend after the backend. */ 2252 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); 2253 if (ret < 0) 2254 return ret; 2255 2256 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", 2257 fe->dai_link->name, cmd); 2258 2259 ret = soc_pcm_trigger(substream, cmd); 2260 2261 return ret; 2262 } 2263 2264 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd) 2265 { 2266 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2267 int stream = substream->stream; 2268 int ret = 0; 2269 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2270 2271 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; 2272 2273 switch (trigger) { 2274 case SND_SOC_DPCM_TRIGGER_PRE: 2275 switch (cmd) { 2276 case SNDRV_PCM_TRIGGER_START: 2277 case SNDRV_PCM_TRIGGER_RESUME: 2278 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2279 case SNDRV_PCM_TRIGGER_DRAIN: 2280 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2281 break; 2282 case SNDRV_PCM_TRIGGER_STOP: 2283 case SNDRV_PCM_TRIGGER_SUSPEND: 2284 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2285 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2286 break; 2287 default: 2288 ret = -EINVAL; 2289 break; 2290 } 2291 break; 2292 case SND_SOC_DPCM_TRIGGER_POST: 2293 switch (cmd) { 2294 case SNDRV_PCM_TRIGGER_START: 2295 case SNDRV_PCM_TRIGGER_RESUME: 2296 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2297 case SNDRV_PCM_TRIGGER_DRAIN: 2298 ret = dpcm_dai_trigger_fe_be(substream, cmd, false); 2299 break; 2300 case SNDRV_PCM_TRIGGER_STOP: 2301 case SNDRV_PCM_TRIGGER_SUSPEND: 2302 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2303 ret = dpcm_dai_trigger_fe_be(substream, cmd, true); 2304 break; 2305 default: 2306 ret = -EINVAL; 2307 break; 2308 } 2309 break; 2310 case SND_SOC_DPCM_TRIGGER_BESPOKE: 2311 /* bespoke trigger() - handles both FE and BEs */ 2312 2313 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", 2314 fe->dai_link->name, cmd); 2315 2316 ret = snd_soc_pcm_dai_bespoke_trigger(substream, cmd); 2317 break; 2318 default: 2319 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, 2320 fe->dai_link->name); 2321 ret = -EINVAL; 2322 goto out; 2323 } 2324 2325 if (ret < 0) { 2326 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n", 2327 cmd, ret); 2328 goto out; 2329 } 2330 2331 switch (cmd) { 2332 case SNDRV_PCM_TRIGGER_START: 2333 case SNDRV_PCM_TRIGGER_RESUME: 2334 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 2335 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; 2336 break; 2337 case SNDRV_PCM_TRIGGER_STOP: 2338 case SNDRV_PCM_TRIGGER_SUSPEND: 2339 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; 2340 break; 2341 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 2342 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; 2343 break; 2344 } 2345 2346 out: 2347 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; 2348 return ret; 2349 } 2350 2351 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) 2352 { 2353 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2354 int stream = substream->stream; 2355 2356 /* if FE's runtime_update is already set, we're in race; 2357 * process this trigger later at exit 2358 */ 2359 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) { 2360 fe->dpcm[stream].trigger_pending = cmd + 1; 2361 return 0; /* delayed, assuming it's successful */ 2362 } 2363 2364 /* we're alone, let's trigger */ 2365 return dpcm_fe_dai_do_trigger(substream, cmd); 2366 } 2367 2368 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) 2369 { 2370 struct snd_soc_dpcm *dpcm; 2371 int ret = 0; 2372 2373 for_each_dpcm_be(fe, stream, dpcm) { 2374 2375 struct snd_soc_pcm_runtime *be = dpcm->be; 2376 struct snd_pcm_substream *be_substream = 2377 snd_soc_dpcm_get_substream(be, stream); 2378 2379 /* is this op for this BE ? */ 2380 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2381 continue; 2382 2383 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && 2384 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) && 2385 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) && 2386 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) 2387 continue; 2388 2389 dev_dbg(be->dev, "ASoC: prepare BE %s\n", 2390 be->dai_link->name); 2391 2392 ret = __soc_pcm_prepare(be, be_substream); 2393 if (ret < 0) 2394 break; 2395 2396 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2397 } 2398 2399 if (ret < 0) 2400 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2401 2402 return ret; 2403 } 2404 2405 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) 2406 { 2407 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(substream); 2408 int stream = substream->stream, ret = 0; 2409 2410 snd_soc_dpcm_mutex_lock(fe); 2411 2412 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); 2413 2414 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE); 2415 2416 /* there is no point preparing this FE if there are no BEs */ 2417 if (list_empty(&fe->dpcm[stream].be_clients)) { 2418 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", 2419 fe->dai_link->name); 2420 ret = -EINVAL; 2421 goto out; 2422 } 2423 2424 ret = dpcm_be_dai_prepare(fe, stream); 2425 if (ret < 0) 2426 goto out; 2427 2428 /* call prepare on the frontend */ 2429 ret = __soc_pcm_prepare(fe, substream); 2430 if (ret < 0) 2431 goto out; 2432 2433 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; 2434 2435 out: 2436 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2437 snd_soc_dpcm_mutex_unlock(fe); 2438 2439 if (ret < 0) 2440 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2441 2442 return ret; 2443 } 2444 2445 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) 2446 { 2447 struct snd_pcm_substream *substream = 2448 snd_soc_dpcm_get_substream(fe, stream); 2449 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2450 int err; 2451 2452 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", 2453 stream ? "capture" : "playback", fe->dai_link->name); 2454 2455 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2456 /* call bespoke trigger - FE takes care of all BE triggers */ 2457 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", 2458 fe->dai_link->name); 2459 2460 err = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); 2461 } else { 2462 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", 2463 fe->dai_link->name); 2464 2465 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); 2466 } 2467 2468 dpcm_be_dai_hw_free(fe, stream); 2469 2470 dpcm_be_dai_shutdown(fe, stream); 2471 2472 /* run the stream event for each BE */ 2473 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2474 2475 if (err < 0) 2476 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, err); 2477 2478 return err; 2479 } 2480 2481 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) 2482 { 2483 struct snd_pcm_substream *substream = 2484 snd_soc_dpcm_get_substream(fe, stream); 2485 struct snd_soc_dpcm *dpcm; 2486 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; 2487 int ret = 0; 2488 2489 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", 2490 stream ? "capture" : "playback", fe->dai_link->name); 2491 2492 /* Only start the BE if the FE is ready */ 2493 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || 2494 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { 2495 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", 2496 fe->dai_link->name, fe->dpcm[stream].state); 2497 ret = -EINVAL; 2498 goto disconnect; 2499 } 2500 2501 /* startup must always be called for new BEs */ 2502 ret = dpcm_be_dai_startup(fe, stream); 2503 if (ret < 0) 2504 goto disconnect; 2505 2506 /* keep going if FE state is > open */ 2507 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) 2508 return 0; 2509 2510 ret = dpcm_be_dai_hw_params(fe, stream); 2511 if (ret < 0) 2512 goto close; 2513 2514 /* keep going if FE state is > hw_params */ 2515 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) 2516 return 0; 2517 2518 ret = dpcm_be_dai_prepare(fe, stream); 2519 if (ret < 0) 2520 goto hw_free; 2521 2522 /* run the stream event for each BE */ 2523 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); 2524 2525 /* keep going if FE state is > prepare */ 2526 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || 2527 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) 2528 return 0; 2529 2530 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { 2531 /* call trigger on the frontend - FE takes care of all BE triggers */ 2532 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", 2533 fe->dai_link->name); 2534 2535 ret = snd_soc_pcm_dai_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); 2536 if (ret < 0) 2537 goto hw_free; 2538 } else { 2539 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", 2540 fe->dai_link->name); 2541 2542 ret = dpcm_be_dai_trigger(fe, stream, 2543 SNDRV_PCM_TRIGGER_START); 2544 if (ret < 0) 2545 goto hw_free; 2546 } 2547 2548 return 0; 2549 2550 hw_free: 2551 dpcm_be_dai_hw_free(fe, stream); 2552 close: 2553 dpcm_be_dai_shutdown(fe, stream); 2554 disconnect: 2555 /* disconnect any pending BEs */ 2556 for_each_dpcm_be(fe, stream, dpcm) { 2557 struct snd_soc_pcm_runtime *be = dpcm->be; 2558 2559 /* is this op for this BE ? */ 2560 if (!snd_soc_dpcm_be_can_update(fe, be, stream)) 2561 continue; 2562 2563 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || 2564 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) 2565 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2566 } 2567 2568 if (ret < 0) 2569 dev_err(fe->dev, "ASoC: %s() failed (%d)\n", __func__, ret); 2570 2571 return ret; 2572 } 2573 2574 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new) 2575 { 2576 struct snd_soc_dapm_widget_list *list; 2577 int stream; 2578 int count, paths; 2579 2580 if (!fe->dai_link->dynamic) 2581 return 0; 2582 2583 if (fe->num_cpus > 1) { 2584 dev_err(fe->dev, 2585 "%s doesn't support Multi CPU yet\n", __func__); 2586 return -EINVAL; 2587 } 2588 2589 /* only check active links */ 2590 if (!snd_soc_dai_active(asoc_rtd_to_cpu(fe, 0))) 2591 return 0; 2592 2593 /* DAPM sync will call this to update DSP paths */ 2594 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n", 2595 new ? "new" : "old", fe->dai_link->name); 2596 2597 for_each_pcm_streams(stream) { 2598 2599 /* skip if FE doesn't have playback/capture capability */ 2600 if (!snd_soc_dai_stream_valid(asoc_rtd_to_cpu(fe, 0), stream) || 2601 !snd_soc_dai_stream_valid(asoc_rtd_to_codec(fe, 0), stream)) 2602 continue; 2603 2604 /* skip if FE isn't currently playing/capturing */ 2605 if (!snd_soc_dai_stream_active(asoc_rtd_to_cpu(fe, 0), stream) || 2606 !snd_soc_dai_stream_active(asoc_rtd_to_codec(fe, 0), stream)) 2607 continue; 2608 2609 paths = dpcm_path_get(fe, stream, &list); 2610 if (paths < 0) 2611 return paths; 2612 2613 /* update any playback/capture paths */ 2614 count = dpcm_process_paths(fe, stream, &list, new); 2615 if (count) { 2616 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE); 2617 if (new) 2618 dpcm_run_update_startup(fe, stream); 2619 else 2620 dpcm_run_update_shutdown(fe, stream); 2621 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO); 2622 2623 dpcm_clear_pending_state(fe, stream); 2624 dpcm_be_disconnect(fe, stream); 2625 } 2626 2627 dpcm_path_put(&list); 2628 } 2629 2630 return 0; 2631 } 2632 2633 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and 2634 * any DAI links. 2635 */ 2636 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card) 2637 { 2638 struct snd_soc_pcm_runtime *fe; 2639 int ret = 0; 2640 2641 mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass); 2642 /* shutdown all old paths first */ 2643 for_each_card_rtds(card, fe) { 2644 ret = soc_dpcm_fe_runtime_update(fe, 0); 2645 if (ret) 2646 goto out; 2647 } 2648 2649 /* bring new paths up */ 2650 for_each_card_rtds(card, fe) { 2651 ret = soc_dpcm_fe_runtime_update(fe, 1); 2652 if (ret) 2653 goto out; 2654 } 2655 2656 out: 2657 mutex_unlock(&card->pcm_mutex); 2658 return ret; 2659 } 2660 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update); 2661 2662 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream) 2663 { 2664 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2665 struct snd_soc_dpcm *dpcm; 2666 int stream = fe_substream->stream; 2667 2668 snd_soc_dpcm_mutex_assert_held(fe); 2669 2670 /* mark FE's links ready to prune */ 2671 for_each_dpcm_be(fe, stream, dpcm) 2672 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; 2673 2674 dpcm_be_disconnect(fe, stream); 2675 2676 fe->dpcm[stream].runtime = NULL; 2677 } 2678 2679 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) 2680 { 2681 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2682 int ret; 2683 2684 snd_soc_dpcm_mutex_lock(fe); 2685 ret = dpcm_fe_dai_shutdown(fe_substream); 2686 2687 dpcm_fe_dai_cleanup(fe_substream); 2688 2689 snd_soc_dpcm_mutex_unlock(fe); 2690 return ret; 2691 } 2692 2693 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) 2694 { 2695 struct snd_soc_pcm_runtime *fe = asoc_substream_to_rtd(fe_substream); 2696 struct snd_soc_dapm_widget_list *list; 2697 int ret; 2698 int stream = fe_substream->stream; 2699 2700 snd_soc_dpcm_mutex_lock(fe); 2701 fe->dpcm[stream].runtime = fe_substream->runtime; 2702 2703 ret = dpcm_path_get(fe, stream, &list); 2704 if (ret < 0) 2705 goto open_end; 2706 2707 /* calculate valid and active FE <-> BE dpcms */ 2708 dpcm_process_paths(fe, stream, &list, 1); 2709 2710 ret = dpcm_fe_dai_startup(fe_substream); 2711 if (ret < 0) 2712 dpcm_fe_dai_cleanup(fe_substream); 2713 2714 dpcm_clear_pending_state(fe, stream); 2715 dpcm_path_put(&list); 2716 open_end: 2717 snd_soc_dpcm_mutex_unlock(fe); 2718 return ret; 2719 } 2720 2721 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd, 2722 int *playback, int *capture) 2723 { 2724 struct snd_soc_dai *cpu_dai; 2725 int i; 2726 2727 if (rtd->dai_link->dynamic && rtd->num_cpus > 1) { 2728 dev_err(rtd->dev, 2729 "DPCM doesn't support Multi CPU for Front-Ends yet\n"); 2730 return -EINVAL; 2731 } 2732 2733 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { 2734 int stream; 2735 2736 if (rtd->dai_link->dpcm_playback) { 2737 stream = SNDRV_PCM_STREAM_PLAYBACK; 2738 2739 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2740 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2741 *playback = 1; 2742 break; 2743 } 2744 } 2745 if (!*playback) { 2746 dev_err(rtd->card->dev, 2747 "No CPU DAIs support playback for stream %s\n", 2748 rtd->dai_link->stream_name); 2749 return -EINVAL; 2750 } 2751 } 2752 if (rtd->dai_link->dpcm_capture) { 2753 stream = SNDRV_PCM_STREAM_CAPTURE; 2754 2755 for_each_rtd_cpu_dais(rtd, i, cpu_dai) { 2756 if (snd_soc_dai_stream_valid(cpu_dai, stream)) { 2757 *capture = 1; 2758 break; 2759 } 2760 } 2761 2762 if (!*capture) { 2763 dev_err(rtd->card->dev, 2764 "No CPU DAIs support capture for stream %s\n", 2765 rtd->dai_link->stream_name); 2766 return -EINVAL; 2767 } 2768 } 2769 } else { 2770 struct snd_soc_dai *codec_dai; 2771 2772 /* Adapt stream for codec2codec links */ 2773 int cpu_capture = rtd->dai_link->params ? 2774 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 2775 int cpu_playback = rtd->dai_link->params ? 2776 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 2777 2778 for_each_rtd_codec_dais(rtd, i, codec_dai) { 2779 if (rtd->num_cpus == 1) { 2780 cpu_dai = asoc_rtd_to_cpu(rtd, 0); 2781 } else if (rtd->num_cpus == rtd->num_codecs) { 2782 cpu_dai = asoc_rtd_to_cpu(rtd, i); 2783 } else { 2784 dev_err(rtd->card->dev, 2785 "N cpus to M codecs link is not supported yet\n"); 2786 return -EINVAL; 2787 } 2788 2789 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && 2790 snd_soc_dai_stream_valid(cpu_dai, cpu_playback)) 2791 *playback = 1; 2792 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && 2793 snd_soc_dai_stream_valid(cpu_dai, cpu_capture)) 2794 *capture = 1; 2795 } 2796 } 2797 2798 if (rtd->dai_link->playback_only) { 2799 *playback = 1; 2800 *capture = 0; 2801 } 2802 2803 if (rtd->dai_link->capture_only) { 2804 *playback = 0; 2805 *capture = 1; 2806 } 2807 2808 return 0; 2809 } 2810 2811 static int soc_create_pcm(struct snd_pcm **pcm, 2812 struct snd_soc_pcm_runtime *rtd, 2813 int playback, int capture, int num) 2814 { 2815 char new_name[64]; 2816 int ret; 2817 2818 /* create the PCM */ 2819 if (rtd->dai_link->params) { 2820 snprintf(new_name, sizeof(new_name), "codec2codec(%s)", 2821 rtd->dai_link->stream_name); 2822 2823 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2824 playback, capture, pcm); 2825 } else if (rtd->dai_link->no_pcm) { 2826 snprintf(new_name, sizeof(new_name), "(%s)", 2827 rtd->dai_link->stream_name); 2828 2829 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, 2830 playback, capture, pcm); 2831 } else { 2832 if (rtd->dai_link->dynamic) 2833 snprintf(new_name, sizeof(new_name), "%s (*)", 2834 rtd->dai_link->stream_name); 2835 else 2836 snprintf(new_name, sizeof(new_name), "%s %s-%d", 2837 rtd->dai_link->stream_name, 2838 soc_codec_dai_name(rtd), num); 2839 2840 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, 2841 capture, pcm); 2842 } 2843 if (ret < 0) { 2844 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n", 2845 new_name, rtd->dai_link->name, ret); 2846 return ret; 2847 } 2848 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); 2849 2850 return 0; 2851 } 2852 2853 /* create a new pcm */ 2854 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) 2855 { 2856 struct snd_soc_component *component; 2857 struct snd_pcm *pcm; 2858 int ret = 0, playback = 0, capture = 0; 2859 int i; 2860 2861 ret = soc_get_playback_capture(rtd, &playback, &capture); 2862 if (ret < 0) 2863 return ret; 2864 2865 ret = soc_create_pcm(&pcm, rtd, playback, capture, num); 2866 if (ret < 0) 2867 return ret; 2868 2869 /* DAPM dai link stream work */ 2870 if (rtd->dai_link->params) 2871 rtd->close_delayed_work_func = codec2codec_close_delayed_work; 2872 else 2873 rtd->close_delayed_work_func = snd_soc_close_delayed_work; 2874 2875 rtd->pcm = pcm; 2876 pcm->nonatomic = rtd->dai_link->nonatomic; 2877 pcm->private_data = rtd; 2878 2879 if (rtd->dai_link->no_pcm || rtd->dai_link->params) { 2880 if (playback) 2881 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; 2882 if (capture) 2883 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; 2884 goto out; 2885 } 2886 2887 /* ASoC PCM operations */ 2888 if (rtd->dai_link->dynamic) { 2889 rtd->ops.open = dpcm_fe_dai_open; 2890 rtd->ops.hw_params = dpcm_fe_dai_hw_params; 2891 rtd->ops.prepare = dpcm_fe_dai_prepare; 2892 rtd->ops.trigger = dpcm_fe_dai_trigger; 2893 rtd->ops.hw_free = dpcm_fe_dai_hw_free; 2894 rtd->ops.close = dpcm_fe_dai_close; 2895 rtd->ops.pointer = soc_pcm_pointer; 2896 } else { 2897 rtd->ops.open = soc_pcm_open; 2898 rtd->ops.hw_params = soc_pcm_hw_params; 2899 rtd->ops.prepare = soc_pcm_prepare; 2900 rtd->ops.trigger = soc_pcm_trigger; 2901 rtd->ops.hw_free = soc_pcm_hw_free; 2902 rtd->ops.close = soc_pcm_close; 2903 rtd->ops.pointer = soc_pcm_pointer; 2904 } 2905 2906 for_each_rtd_components(rtd, i, component) { 2907 const struct snd_soc_component_driver *drv = component->driver; 2908 2909 if (drv->ioctl) 2910 rtd->ops.ioctl = snd_soc_pcm_component_ioctl; 2911 if (drv->sync_stop) 2912 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop; 2913 if (drv->copy_user) 2914 rtd->ops.copy_user = snd_soc_pcm_component_copy_user; 2915 if (drv->page) 2916 rtd->ops.page = snd_soc_pcm_component_page; 2917 if (drv->mmap) 2918 rtd->ops.mmap = snd_soc_pcm_component_mmap; 2919 if (drv->ack) 2920 rtd->ops.ack = snd_soc_pcm_component_ack; 2921 } 2922 2923 if (playback) 2924 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); 2925 2926 if (capture) 2927 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); 2928 2929 ret = snd_soc_pcm_component_new(rtd); 2930 if (ret < 0) 2931 return ret; 2932 2933 pcm->no_device_suspend = true; 2934 out: 2935 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n", 2936 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd)); 2937 return ret; 2938 } 2939 2940 /* is the current PCM operation for this FE ? */ 2941 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) 2942 { 2943 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) 2944 return 1; 2945 return 0; 2946 } 2947 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); 2948 2949 /* is the current PCM operation for this BE ? */ 2950 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, 2951 struct snd_soc_pcm_runtime *be, int stream) 2952 { 2953 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || 2954 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && 2955 be->dpcm[stream].runtime_update)) 2956 return 1; 2957 return 0; 2958 } 2959 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); 2960 2961 /* get the substream for this BE */ 2962 struct snd_pcm_substream * 2963 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) 2964 { 2965 return be->pcm->streams[stream].substream; 2966 } 2967 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); 2968 2969 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe, 2970 struct snd_soc_pcm_runtime *be, 2971 int stream, 2972 const enum snd_soc_dpcm_state *states, 2973 int num_states) 2974 { 2975 struct snd_soc_dpcm *dpcm; 2976 int state; 2977 int ret = 1; 2978 int i; 2979 2980 for_each_dpcm_fe(be, stream, dpcm) { 2981 2982 if (dpcm->fe == fe) 2983 continue; 2984 2985 state = dpcm->fe->dpcm[stream].state; 2986 for (i = 0; i < num_states; i++) { 2987 if (state == states[i]) { 2988 ret = 0; 2989 break; 2990 } 2991 } 2992 } 2993 2994 /* it's safe to do this BE DAI */ 2995 return ret; 2996 } 2997 2998 /* 2999 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE 3000 * are not running, paused or suspended for the specified stream direction. 3001 */ 3002 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, 3003 struct snd_soc_pcm_runtime *be, int stream) 3004 { 3005 const enum snd_soc_dpcm_state state[] = { 3006 SND_SOC_DPCM_STATE_START, 3007 SND_SOC_DPCM_STATE_PAUSED, 3008 SND_SOC_DPCM_STATE_SUSPEND, 3009 }; 3010 3011 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3012 } 3013 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); 3014 3015 /* 3016 * We can only change hw params a BE DAI if any of it's FE are not prepared, 3017 * running, paused or suspended for the specified stream direction. 3018 */ 3019 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, 3020 struct snd_soc_pcm_runtime *be, int stream) 3021 { 3022 const enum snd_soc_dpcm_state state[] = { 3023 SND_SOC_DPCM_STATE_START, 3024 SND_SOC_DPCM_STATE_PAUSED, 3025 SND_SOC_DPCM_STATE_SUSPEND, 3026 SND_SOC_DPCM_STATE_PREPARE, 3027 }; 3028 3029 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state)); 3030 } 3031 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); 3032