1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // ASoC audio graph sound card support 4 // 5 // Copyright (C) 2016 Renesas Solutions Corp. 6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 // 8 // based on ${LINUX}/sound/soc/generic/simple-card.c 9 10 #include <linux/cleanup.h> 11 #include <linux/clk.h> 12 #include <linux/device.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_graph.h> 17 #include <linux/platform_device.h> 18 #include <linux/string.h> 19 #include <sound/graph_card.h> 20 21 #define DPCM_SELECTABLE 1 22 23 #define ep_to_port(ep) of_get_parent(ep) 24 static struct device_node *port_to_ports(struct device_node *port) 25 { 26 struct device_node *ports = of_get_parent(port); 27 28 if (!of_node_name_eq(ports, "ports")) { 29 of_node_put(ports); 30 return NULL; 31 } 32 return ports; 33 } 34 35 static int graph_outdrv_event(struct snd_soc_dapm_widget *w, 36 struct snd_kcontrol *kcontrol, 37 int event) 38 { 39 struct snd_soc_dapm_context *dapm = w->dapm; 40 struct simple_util_priv *priv = snd_soc_card_get_drvdata(dapm->card); 41 42 switch (event) { 43 case SND_SOC_DAPM_POST_PMU: 44 gpiod_set_value_cansleep(priv->pa_gpio, 1); 45 break; 46 case SND_SOC_DAPM_PRE_PMD: 47 gpiod_set_value_cansleep(priv->pa_gpio, 0); 48 break; 49 default: 50 return -EINVAL; 51 } 52 53 return 0; 54 } 55 56 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = { 57 SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, 58 0, 0, NULL, 0, graph_outdrv_event, 59 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 60 }; 61 62 static const struct snd_soc_ops graph_ops = { 63 .startup = simple_util_startup, 64 .shutdown = simple_util_shutdown, 65 .hw_params = simple_util_hw_params, 66 }; 67 68 static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc) 69 { 70 struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc); 71 72 if (dai && (dai->component->driver->pcm_construct || 73 (dai->driver->ops && dai->driver->ops->pcm_new))) 74 return true; 75 76 return false; 77 } 78 79 static void graph_parse_convert(struct device *dev, 80 struct device_node *ep, 81 struct simple_util_data *adata) 82 { 83 struct device_node *top = dev->of_node; 84 struct device_node *port = ep_to_port(ep); 85 struct device_node *ports = port_to_ports(port); 86 struct device_node *node = of_graph_get_port_parent(ep); 87 88 simple_util_parse_convert(top, NULL, adata); 89 simple_util_parse_convert(ports, NULL, adata); 90 simple_util_parse_convert(port, NULL, adata); 91 simple_util_parse_convert(ep, NULL, adata); 92 93 of_node_put(port); 94 of_node_put(ports); 95 of_node_put(node); 96 } 97 98 static int graph_parse_node(struct simple_util_priv *priv, 99 struct device_node *ep, 100 struct link_info *li, 101 int *cpu) 102 { 103 struct device *dev = simple_priv_to_dev(priv); 104 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 105 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 106 struct snd_soc_dai_link_component *dlc; 107 struct simple_util_dai *dai; 108 int ret; 109 110 if (cpu) { 111 dlc = snd_soc_link_to_cpu(dai_link, 0); 112 dai = simple_props_to_dai_cpu(dai_props, 0); 113 } else { 114 dlc = snd_soc_link_to_codec(dai_link, 0); 115 dai = simple_props_to_dai_codec(dai_props, 0); 116 } 117 118 ret = graph_util_parse_dai(dev, ep, dlc, cpu); 119 if (ret < 0) 120 return ret; 121 122 ret = simple_util_parse_tdm(ep, dai); 123 if (ret < 0) 124 return ret; 125 126 ret = simple_util_parse_clk(dev, ep, dai, dlc); 127 if (ret < 0) 128 return ret; 129 130 return 0; 131 } 132 133 static int graph_link_init(struct simple_util_priv *priv, 134 struct device_node *ep_cpu, 135 struct device_node *ep_codec, 136 struct link_info *li, 137 char *name) 138 { 139 struct device *dev = simple_priv_to_dev(priv); 140 struct device_node *top = dev->of_node; 141 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 142 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 143 struct device_node *port_cpu = ep_to_port(ep_cpu); 144 struct device_node *port_codec = ep_to_port(ep_codec); 145 struct device_node *ports_cpu = port_to_ports(port_cpu); 146 struct device_node *ports_codec = port_to_ports(port_codec); 147 enum snd_soc_trigger_order trigger_start = SND_SOC_TRIGGER_ORDER_DEFAULT; 148 enum snd_soc_trigger_order trigger_stop = SND_SOC_TRIGGER_ORDER_DEFAULT; 149 bool playback_only = 0, capture_only = 0; 150 int ret; 151 152 ret = simple_util_parse_daifmt(dev, ep_cpu, ep_codec, 153 NULL, &dai_link->dai_fmt); 154 if (ret < 0) 155 goto init_end; 156 157 graph_util_parse_link_direction(top, &playback_only, &capture_only); 158 graph_util_parse_link_direction(port_cpu, &playback_only, &capture_only); 159 graph_util_parse_link_direction(port_codec, &playback_only, &capture_only); 160 graph_util_parse_link_direction(ep_cpu, &playback_only, &capture_only); 161 graph_util_parse_link_direction(ep_codec, &playback_only, &capture_only); 162 163 of_property_read_u32(top, "mclk-fs", &dai_props->mclk_fs); 164 of_property_read_u32(ports_cpu, "mclk-fs", &dai_props->mclk_fs); 165 of_property_read_u32(ports_codec, "mclk-fs", &dai_props->mclk_fs); 166 of_property_read_u32(port_cpu, "mclk-fs", &dai_props->mclk_fs); 167 of_property_read_u32(port_codec, "mclk-fs", &dai_props->mclk_fs); 168 of_property_read_u32(ep_cpu, "mclk-fs", &dai_props->mclk_fs); 169 of_property_read_u32(ep_codec, "mclk-fs", &dai_props->mclk_fs); 170 171 graph_util_parse_trigger_order(priv, top, &trigger_start, &trigger_stop); 172 graph_util_parse_trigger_order(priv, ports_cpu, &trigger_start, &trigger_stop); 173 graph_util_parse_trigger_order(priv, ports_codec, &trigger_start, &trigger_stop); 174 graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); 175 graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); 176 graph_util_parse_trigger_order(priv, ep_cpu, &trigger_start, &trigger_stop); 177 graph_util_parse_trigger_order(priv, ep_codec, &trigger_start, &trigger_stop); 178 179 dai_link->playback_only = playback_only; 180 dai_link->capture_only = capture_only; 181 182 dai_link->trigger_start = trigger_start; 183 dai_link->trigger_stop = trigger_stop; 184 185 dai_link->init = simple_util_dai_init; 186 dai_link->ops = &graph_ops; 187 if (priv->ops) 188 dai_link->ops = priv->ops; 189 190 ret = simple_util_set_dailink_name(dev, dai_link, name); 191 init_end: 192 of_node_put(ports_cpu); 193 of_node_put(ports_codec); 194 of_node_put(port_cpu); 195 of_node_put(port_codec); 196 197 return ret; 198 } 199 200 static int graph_dai_link_of_dpcm(struct simple_util_priv *priv, 201 struct device_node *cpu_ep, 202 struct device_node *codec_ep, 203 struct link_info *li) 204 { 205 struct device *dev = simple_priv_to_dev(priv); 206 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 207 struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); 208 struct device_node *top = dev->of_node; 209 struct device_node *ep = li->cpu ? cpu_ep : codec_ep; 210 char dai_name[64]; 211 int ret; 212 213 dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); 214 215 if (li->cpu) { 216 struct snd_soc_card *card = simple_priv_to_card(priv); 217 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); 218 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); 219 int is_single_links = 0; 220 221 /* Codec is dummy */ 222 223 /* FE settings */ 224 dai_link->dynamic = 1; 225 dai_link->dpcm_merged_format = 1; 226 227 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 228 if (ret) 229 return ret; 230 231 snprintf(dai_name, sizeof(dai_name), 232 "fe.%pOFP.%s", cpus->of_node, cpus->dai_name); 233 /* 234 * In BE<->BE connections it is not required to create 235 * PCM devices at CPU end of the dai link and thus 'no_pcm' 236 * flag needs to be set. It is useful when there are many 237 * BE components and some of these have to be connected to 238 * form a valid audio path. 239 * 240 * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where 241 * there are 'n' BE components in the path. 242 */ 243 if (card->component_chaining && !soc_component_is_pcm(cpus)) { 244 dai_link->no_pcm = 1; 245 dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; 246 } 247 248 simple_util_canonicalize_cpu(cpus, is_single_links); 249 simple_util_canonicalize_platform(platforms, cpus); 250 } else { 251 struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0); 252 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); 253 struct device_node *port; 254 struct device_node *ports; 255 256 /* CPU is dummy */ 257 258 /* BE settings */ 259 dai_link->no_pcm = 1; 260 dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; 261 262 ret = graph_parse_node(priv, codec_ep, li, NULL); 263 if (ret < 0) 264 return ret; 265 266 snprintf(dai_name, sizeof(dai_name), 267 "be.%pOFP.%s", codecs->of_node, codecs->dai_name); 268 269 /* check "prefix" from top node */ 270 port = ep_to_port(ep); 271 ports = port_to_ports(port); 272 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, "prefix"); 273 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix"); 274 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node, "prefix"); 275 276 of_node_put(ports); 277 of_node_put(port); 278 } 279 280 graph_parse_convert(dev, ep, &dai_props->adata); 281 282 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 283 284 li->link++; 285 286 return ret; 287 } 288 289 static int graph_dai_link_of(struct simple_util_priv *priv, 290 struct device_node *cpu_ep, 291 struct device_node *codec_ep, 292 struct link_info *li) 293 { 294 struct device *dev = simple_priv_to_dev(priv); 295 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); 296 struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); 297 struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); 298 struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); 299 char dai_name[64]; 300 int ret, is_single_links = 0; 301 302 dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); 303 304 ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); 305 if (ret < 0) 306 return ret; 307 308 ret = graph_parse_node(priv, codec_ep, li, NULL); 309 if (ret < 0) 310 return ret; 311 312 snprintf(dai_name, sizeof(dai_name), 313 "%s-%s", cpus->dai_name, codecs->dai_name); 314 315 simple_util_canonicalize_cpu(cpus, is_single_links); 316 simple_util_canonicalize_platform(platforms, cpus); 317 318 ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); 319 if (ret < 0) 320 return ret; 321 322 li->link++; 323 324 return 0; 325 } 326 327 static inline bool parse_as_dpcm_link(struct simple_util_priv *priv, 328 struct device_node *codec_port, 329 struct simple_util_data *adata) 330 { 331 if (priv->force_dpcm) 332 return true; 333 334 if (!priv->dpcm_selectable) 335 return false; 336 337 /* 338 * It is DPCM 339 * if Codec port has many endpoints, 340 * or has convert-xxx property 341 */ 342 if ((of_get_child_count(codec_port) > 1) || 343 simple_util_is_convert_required(adata)) 344 return true; 345 346 return false; 347 } 348 349 static int __graph_for_each_link(struct simple_util_priv *priv, 350 struct link_info *li, 351 int (*func_noml)(struct simple_util_priv *priv, 352 struct device_node *cpu_ep, 353 struct device_node *codec_ep, 354 struct link_info *li), 355 int (*func_dpcm)(struct simple_util_priv *priv, 356 struct device_node *cpu_ep, 357 struct device_node *codec_ep, 358 struct link_info *li)) 359 { 360 struct of_phandle_iterator it; 361 struct device *dev = simple_priv_to_dev(priv); 362 struct device_node *node = dev->of_node; 363 struct device_node *cpu_port; 364 struct device_node *codec_ep; 365 struct device_node *codec_port; 366 struct device_node *codec_port_old = NULL; 367 struct simple_util_data adata; 368 int rc, ret = 0; 369 370 /* loop for all listed CPU port */ 371 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { 372 cpu_port = it.node; 373 374 /* loop for all CPU endpoint */ 375 for_each_child_of_node_scoped(cpu_port, cpu_ep) { 376 /* get codec */ 377 codec_ep = of_graph_get_remote_endpoint(cpu_ep); 378 codec_port = ep_to_port(codec_ep); 379 380 /* get convert-xxx property */ 381 memset(&adata, 0, sizeof(adata)); 382 graph_parse_convert(dev, codec_ep, &adata); 383 graph_parse_convert(dev, cpu_ep, &adata); 384 385 /* check if link requires DPCM parsing */ 386 if (parse_as_dpcm_link(priv, codec_port, &adata)) { 387 /* 388 * Codec endpoint can be NULL for pluggable audio HW. 389 * Platform DT can populate the Codec endpoint depending on the 390 * plugged HW. 391 */ 392 /* Do it all CPU endpoint, and 1st Codec endpoint */ 393 if (li->cpu || 394 ((codec_port_old != codec_port) && codec_ep)) 395 ret = func_dpcm(priv, cpu_ep, codec_ep, li); 396 /* else normal sound */ 397 } else { 398 if (li->cpu) 399 ret = func_noml(priv, cpu_ep, codec_ep, li); 400 } 401 402 of_node_put(codec_ep); 403 of_node_put(codec_port); 404 405 if (ret < 0) 406 return ret; 407 408 codec_port_old = codec_port; 409 } 410 } 411 412 return 0; 413 } 414 415 static int graph_for_each_link(struct simple_util_priv *priv, 416 struct link_info *li, 417 int (*func_noml)(struct simple_util_priv *priv, 418 struct device_node *cpu_ep, 419 struct device_node *codec_ep, 420 struct link_info *li), 421 int (*func_dpcm)(struct simple_util_priv *priv, 422 struct device_node *cpu_ep, 423 struct device_node *codec_ep, 424 struct link_info *li)) 425 { 426 int ret; 427 /* 428 * Detect all CPU first, and Detect all Codec 2nd. 429 * 430 * In Normal sound case, all DAIs are detected 431 * as "CPU-Codec". 432 * 433 * In DPCM sound case, 434 * all CPUs are detected as "CPU-dummy", and 435 * all Codecs are detected as "dummy-Codec". 436 * To avoid random sub-device numbering, 437 * detect "dummy-Codec" in last; 438 */ 439 for (li->cpu = 1; li->cpu >= 0; li->cpu--) { 440 ret = __graph_for_each_link(priv, li, func_noml, func_dpcm); 441 if (ret < 0) 442 break; 443 } 444 445 return ret; 446 } 447 448 static int graph_count_noml(struct simple_util_priv *priv, 449 struct device_node *cpu_ep, 450 struct device_node *codec_ep, 451 struct link_info *li) 452 { 453 struct device *dev = simple_priv_to_dev(priv); 454 455 if (li->link >= SNDRV_MAX_LINKS) { 456 dev_err(dev, "too many links\n"); 457 return -EINVAL; 458 } 459 460 /* 461 * DON'T REMOVE platforms 462 * see 463 * simple-card.c :: simple_count_noml() 464 */ 465 li->num[li->link].cpus = 1; 466 li->num[li->link].platforms = 1; 467 468 li->num[li->link].codecs = 1; 469 470 li->link += 1; /* 1xCPU-Codec */ 471 472 dev_dbg(dev, "Count As Normal\n"); 473 474 return 0; 475 } 476 477 static int graph_count_dpcm(struct simple_util_priv *priv, 478 struct device_node *cpu_ep, 479 struct device_node *codec_ep, 480 struct link_info *li) 481 { 482 struct device *dev = simple_priv_to_dev(priv); 483 484 if (li->link >= SNDRV_MAX_LINKS) { 485 dev_err(dev, "too many links\n"); 486 return -EINVAL; 487 } 488 489 if (li->cpu) { 490 /* 491 * DON'T REMOVE platforms 492 * see 493 * simple-card.c :: simple_count_noml() 494 */ 495 li->num[li->link].cpus = 1; 496 li->num[li->link].platforms = 1; 497 498 li->link++; /* 1xCPU-dummy */ 499 } else { 500 li->num[li->link].codecs = 1; 501 502 li->link++; /* 1xdummy-Codec */ 503 } 504 505 dev_dbg(dev, "Count As DPCM\n"); 506 507 return 0; 508 } 509 510 static int graph_get_dais_count(struct simple_util_priv *priv, 511 struct link_info *li) 512 { 513 /* 514 * link_num : number of links. 515 * CPU-Codec / CPU-dummy / dummy-Codec 516 * dais_num : number of DAIs 517 * ccnf_num : number of codec_conf 518 * same number for "dummy-Codec" 519 * 520 * ex1) 521 * CPU0 --- Codec0 link : 5 522 * CPU1 --- Codec1 dais : 7 523 * CPU2 -/ ccnf : 1 524 * CPU3 --- Codec2 525 * 526 * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec 527 * => 7 DAIs = 4xCPU + 3xCodec 528 * => 1 ccnf = 1xdummy-Codec 529 * 530 * ex2) 531 * CPU0 --- Codec0 link : 5 532 * CPU1 --- Codec1 dais : 6 533 * CPU2 -/ ccnf : 1 534 * CPU3 -/ 535 * 536 * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec 537 * => 6 DAIs = 4xCPU + 2xCodec 538 * => 1 ccnf = 1xdummy-Codec 539 * 540 * ex3) 541 * CPU0 --- Codec0 link : 6 542 * CPU1 -/ dais : 6 543 * CPU2 --- Codec1 ccnf : 2 544 * CPU3 -/ 545 * 546 * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec 547 * => 6 DAIs = 4xCPU + 2xCodec 548 * => 2 ccnf = 2xdummy-Codec 549 * 550 * ex4) 551 * CPU0 --- Codec0 (convert-rate) link : 3 552 * CPU1 --- Codec1 dais : 4 553 * ccnf : 1 554 * 555 * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec 556 * => 4 DAIs = 2xCPU + 2xCodec 557 * => 1 ccnf = 1xdummy-Codec 558 */ 559 return graph_for_each_link(priv, li, 560 graph_count_noml, 561 graph_count_dpcm); 562 } 563 564 int audio_graph_parse_of(struct simple_util_priv *priv, struct device *dev) 565 { 566 struct snd_soc_card *card = simple_priv_to_card(priv); 567 int ret; 568 569 struct link_info *li __free(kfree) = kzalloc(sizeof(*li), GFP_KERNEL); 570 if (!li) 571 return -ENOMEM; 572 573 card->owner = THIS_MODULE; 574 card->dev = dev; 575 576 ret = graph_get_dais_count(priv, li); 577 if (ret < 0) 578 return ret; 579 580 if (!li->link) 581 return -EINVAL; 582 583 ret = simple_util_init_priv(priv, li); 584 if (ret < 0) 585 return ret; 586 587 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); 588 if (IS_ERR(priv->pa_gpio)) { 589 ret = PTR_ERR(priv->pa_gpio); 590 dev_err(dev, "failed to get amplifier gpio: %d\n", ret); 591 return ret; 592 } 593 594 ret = simple_util_parse_widgets(card, NULL); 595 if (ret < 0) 596 return ret; 597 598 ret = simple_util_parse_routing(card, NULL); 599 if (ret < 0) 600 return ret; 601 602 memset(li, 0, sizeof(*li)); 603 ret = graph_for_each_link(priv, li, 604 graph_dai_link_of, 605 graph_dai_link_of_dpcm); 606 if (ret < 0) 607 goto err; 608 609 ret = simple_util_parse_card_name(card, NULL); 610 if (ret < 0) 611 goto err; 612 613 snd_soc_card_set_drvdata(card, priv); 614 615 simple_util_debug_info(priv); 616 617 ret = devm_snd_soc_register_card(dev, card); 618 if (ret < 0) 619 goto err; 620 621 return 0; 622 623 err: 624 simple_util_clean_reference(card); 625 626 return dev_err_probe(dev, ret, "parse error\n"); 627 } 628 EXPORT_SYMBOL_GPL(audio_graph_parse_of); 629 630 static int graph_probe(struct platform_device *pdev) 631 { 632 struct simple_util_priv *priv; 633 struct device *dev = &pdev->dev; 634 struct snd_soc_card *card; 635 636 /* Allocate the private data and the DAI link array */ 637 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 638 if (!priv) 639 return -ENOMEM; 640 641 card = simple_priv_to_card(priv); 642 card->dapm_widgets = graph_dapm_widgets; 643 card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets); 644 card->probe = graph_util_card_probe; 645 646 if (of_device_get_match_data(dev)) 647 priv->dpcm_selectable = 1; 648 649 return audio_graph_parse_of(priv, dev); 650 } 651 652 static const struct of_device_id graph_of_match[] = { 653 { .compatible = "audio-graph-card", }, 654 { .compatible = "audio-graph-scu-card", 655 .data = (void *)DPCM_SELECTABLE }, 656 {}, 657 }; 658 MODULE_DEVICE_TABLE(of, graph_of_match); 659 660 static struct platform_driver graph_card = { 661 .driver = { 662 .name = "asoc-audio-graph-card", 663 .pm = &snd_soc_pm_ops, 664 .of_match_table = graph_of_match, 665 }, 666 .probe = graph_probe, 667 .remove = simple_util_remove, 668 }; 669 module_platform_driver(graph_card); 670 671 MODULE_ALIAS("platform:asoc-audio-graph-card"); 672 MODULE_LICENSE("GPL v2"); 673 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 674 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 675