1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright(c) 2017-18 Intel Corporation. 3 4 /* 5 * Intel Kabylake I2S Machine Driver with MAX98357A & DA7219 Codecs 6 * 7 * Modified from: 8 * Intel Kabylake I2S Machine driver supporting MAXIM98927 and 9 * RT5663 codecs 10 */ 11 12 #include <linux/input.h> 13 #include <linux/module.h> 14 #include <linux/platform_device.h> 15 #include <sound/core.h> 16 #include <sound/jack.h> 17 #include <sound/pcm.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include "../../codecs/da7219.h" 21 #include "../../codecs/hdac_hdmi.h" 22 #include "../skylake/skl.h" 23 #include "../../codecs/da7219-aad.h" 24 25 #define KBL_DIALOG_CODEC_DAI "da7219-hifi" 26 #define KBL_MAXIM_CODEC_DAI "HiFi" 27 #define MAXIM_DEV0_NAME "MX98357A:00" 28 #define DUAL_CHANNEL 2 29 #define QUAD_CHANNEL 4 30 31 static struct snd_soc_card *kabylake_audio_card; 32 static struct snd_soc_jack skylake_hdmi[3]; 33 34 struct kbl_hdmi_pcm { 35 struct list_head head; 36 struct snd_soc_dai *codec_dai; 37 int device; 38 }; 39 40 struct kbl_codec_private { 41 struct snd_soc_jack kabylake_headset; 42 struct list_head hdmi_pcm_list; 43 }; 44 45 enum { 46 KBL_DPCM_AUDIO_PB = 0, 47 KBL_DPCM_AUDIO_CP, 48 KBL_DPCM_AUDIO_DMIC_CP, 49 KBL_DPCM_AUDIO_HDMI1_PB, 50 KBL_DPCM_AUDIO_HDMI2_PB, 51 KBL_DPCM_AUDIO_HDMI3_PB, 52 }; 53 54 static int platform_clock_control(struct snd_soc_dapm_widget *w, 55 struct snd_kcontrol *k, int event) 56 { 57 struct snd_soc_dapm_context *dapm = w->dapm; 58 struct snd_soc_card *card = dapm->card; 59 struct snd_soc_dai *codec_dai; 60 int ret = 0; 61 62 codec_dai = snd_soc_card_get_codec_dai(card, KBL_DIALOG_CODEC_DAI); 63 if (!codec_dai) { 64 dev_err(card->dev, "Codec dai not found; Unable to set/unset codec pll\n"); 65 return -EIO; 66 } 67 68 if (SND_SOC_DAPM_EVENT_OFF(event)) { 69 ret = snd_soc_dai_set_pll(codec_dai, 0, 70 DA7219_SYSCLK_MCLK, 0, 0); 71 if (ret) 72 dev_err(card->dev, "failed to stop PLL: %d\n", ret); 73 } else if (SND_SOC_DAPM_EVENT_ON(event)) { 74 ret = snd_soc_dai_set_pll(codec_dai, 0, DA7219_SYSCLK_PLL_SRM, 75 0, DA7219_PLL_FREQ_OUT_98304); 76 if (ret) 77 dev_err(card->dev, "failed to start PLL: %d\n", ret); 78 } 79 80 return ret; 81 } 82 83 static const struct snd_kcontrol_new kabylake_controls[] = { 84 SOC_DAPM_PIN_SWITCH("Headphone Jack"), 85 SOC_DAPM_PIN_SWITCH("Headset Mic"), 86 SOC_DAPM_PIN_SWITCH("Spk"), 87 }; 88 89 static const struct snd_soc_dapm_widget kabylake_widgets[] = { 90 SND_SOC_DAPM_HP("Headphone Jack", NULL), 91 SND_SOC_DAPM_MIC("Headset Mic", NULL), 92 SND_SOC_DAPM_SPK("Spk", NULL), 93 SND_SOC_DAPM_MIC("SoC DMIC", NULL), 94 SND_SOC_DAPM_SPK("DP", NULL), 95 SND_SOC_DAPM_SPK("HDMI", NULL), 96 SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, 97 platform_clock_control, SND_SOC_DAPM_PRE_PMU | 98 SND_SOC_DAPM_POST_PMD), 99 }; 100 101 static const struct snd_soc_dapm_route kabylake_map[] = { 102 { "Headphone Jack", NULL, "HPL" }, 103 { "Headphone Jack", NULL, "HPR" }, 104 105 /* speaker */ 106 { "Spk", NULL, "Speaker" }, 107 108 /* other jacks */ 109 { "MIC", NULL, "Headset Mic" }, 110 { "DMic", NULL, "SoC DMIC" }, 111 112 { "HDMI", NULL, "hif5 Output" }, 113 { "DP", NULL, "hif6 Output" }, 114 115 /* CODEC BE connections */ 116 { "HiFi Playback", NULL, "ssp0 Tx" }, 117 { "ssp0 Tx", NULL, "codec0_out" }, 118 119 { "Playback", NULL, "ssp1 Tx" }, 120 { "ssp1 Tx", NULL, "codec1_out" }, 121 122 { "codec0_in", NULL, "ssp1 Rx" }, 123 { "ssp1 Rx", NULL, "Capture" }, 124 125 /* DMIC */ 126 { "dmic01_hifi", NULL, "DMIC01 Rx" }, 127 { "DMIC01 Rx", NULL, "DMIC AIF" }, 128 129 { "hifi1", NULL, "iDisp1 Tx" }, 130 { "iDisp1 Tx", NULL, "iDisp1_out" }, 131 { "hifi2", NULL, "iDisp2 Tx" }, 132 { "iDisp2 Tx", NULL, "iDisp2_out" }, 133 { "hifi3", NULL, "iDisp3 Tx"}, 134 { "iDisp3 Tx", NULL, "iDisp3_out"}, 135 136 { "Headphone Jack", NULL, "Platform Clock" }, 137 { "Headset Mic", NULL, "Platform Clock" }, 138 }; 139 140 static int kabylake_ssp_fixup(struct snd_soc_pcm_runtime *rtd, 141 struct snd_pcm_hw_params *params) 142 { 143 struct snd_interval *rate = hw_param_interval(params, 144 SNDRV_PCM_HW_PARAM_RATE); 145 struct snd_interval *channels = hw_param_interval(params, 146 SNDRV_PCM_HW_PARAM_CHANNELS); 147 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 148 149 /* The ADSP will convert the FE rate to 48k, stereo */ 150 rate->min = rate->max = 48000; 151 channels->min = channels->max = DUAL_CHANNEL; 152 153 /* set SSP to 24 bit */ 154 snd_mask_none(fmt); 155 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE); 156 157 return 0; 158 } 159 160 static int kabylake_da7219_codec_init(struct snd_soc_pcm_runtime *rtd) 161 { 162 struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(rtd->card); 163 struct snd_soc_component *component = rtd->codec_dai->component; 164 struct snd_soc_dai *codec_dai = rtd->codec_dai; 165 struct snd_soc_jack *jack; 166 int ret; 167 168 /* Configure sysclk for codec */ 169 ret = snd_soc_dai_set_sysclk(codec_dai, DA7219_CLKSRC_MCLK, 24576000, 170 SND_SOC_CLOCK_IN); 171 if (ret) { 172 dev_err(rtd->dev, "can't set codec sysclk configuration\n"); 173 return ret; 174 } 175 176 /* 177 * Headset buttons map to the google Reference headset. 178 * These can be configured by userspace. 179 */ 180 ret = snd_soc_card_jack_new(kabylake_audio_card, "Headset Jack", 181 SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 | 182 SND_JACK_BTN_2 | SND_JACK_BTN_3 | SND_JACK_LINEOUT, 183 &ctx->kabylake_headset, NULL, 0); 184 if (ret) { 185 dev_err(rtd->dev, "Headset Jack creation failed: %d\n", ret); 186 return ret; 187 } 188 189 jack = &ctx->kabylake_headset; 190 191 snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA); 192 snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOLUMEUP); 193 snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN); 194 snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOICECOMMAND); 195 da7219_aad_jack_det(component, &ctx->kabylake_headset); 196 197 ret = snd_soc_dapm_ignore_suspend(&rtd->card->dapm, "SoC DMIC"); 198 if (ret) 199 dev_err(rtd->dev, "SoC DMIC - Ignore suspend failed %d\n", ret); 200 201 return ret; 202 } 203 204 static int kabylake_hdmi_init(struct snd_soc_pcm_runtime *rtd, int device) 205 { 206 struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(rtd->card); 207 struct snd_soc_dai *dai = rtd->codec_dai; 208 struct kbl_hdmi_pcm *pcm; 209 210 pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL); 211 if (!pcm) 212 return -ENOMEM; 213 214 pcm->device = device; 215 pcm->codec_dai = dai; 216 217 list_add_tail(&pcm->head, &ctx->hdmi_pcm_list); 218 219 return 0; 220 } 221 222 static int kabylake_hdmi1_init(struct snd_soc_pcm_runtime *rtd) 223 { 224 return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI1_PB); 225 } 226 227 static int kabylake_hdmi2_init(struct snd_soc_pcm_runtime *rtd) 228 { 229 return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI2_PB); 230 } 231 232 static int kabylake_hdmi3_init(struct snd_soc_pcm_runtime *rtd) 233 { 234 return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI3_PB); 235 } 236 237 static int kabylake_da7219_fe_init(struct snd_soc_pcm_runtime *rtd) 238 { 239 struct snd_soc_dapm_context *dapm; 240 struct snd_soc_component *component = rtd->cpu_dai->component; 241 242 dapm = snd_soc_component_get_dapm(component); 243 snd_soc_dapm_ignore_suspend(dapm, "Reference Capture"); 244 245 return 0; 246 } 247 248 static const unsigned int rates[] = { 249 48000, 250 }; 251 252 static const struct snd_pcm_hw_constraint_list constraints_rates = { 253 .count = ARRAY_SIZE(rates), 254 .list = rates, 255 .mask = 0, 256 }; 257 258 static const unsigned int channels[] = { 259 DUAL_CHANNEL, 260 }; 261 262 static const struct snd_pcm_hw_constraint_list constraints_channels = { 263 .count = ARRAY_SIZE(channels), 264 .list = channels, 265 .mask = 0, 266 }; 267 268 static unsigned int channels_quad[] = { 269 QUAD_CHANNEL, 270 }; 271 272 static struct snd_pcm_hw_constraint_list constraints_channels_quad = { 273 .count = ARRAY_SIZE(channels_quad), 274 .list = channels_quad, 275 .mask = 0, 276 }; 277 278 static int kbl_fe_startup(struct snd_pcm_substream *substream) 279 { 280 struct snd_pcm_runtime *runtime = substream->runtime; 281 282 /* 283 * On this platform for PCM device we support, 284 * 48Khz 285 * stereo 286 * 16 bit audio 287 */ 288 289 runtime->hw.channels_max = DUAL_CHANNEL; 290 snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 291 &constraints_channels); 292 293 runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; 294 snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16); 295 296 snd_pcm_hw_constraint_list(runtime, 0, 297 SNDRV_PCM_HW_PARAM_RATE, &constraints_rates); 298 299 return 0; 300 } 301 302 static const struct snd_soc_ops kabylake_da7219_fe_ops = { 303 .startup = kbl_fe_startup, 304 }; 305 306 static int kabylake_dmic_fixup(struct snd_soc_pcm_runtime *rtd, 307 struct snd_pcm_hw_params *params) 308 { 309 struct snd_interval *channels = hw_param_interval(params, 310 SNDRV_PCM_HW_PARAM_CHANNELS); 311 312 /* 313 * set BE channel constraint as user FE channels 314 */ 315 316 if (params_channels(params) == 2) 317 channels->min = channels->max = 2; 318 else 319 channels->min = channels->max = 4; 320 321 return 0; 322 } 323 324 static int kabylake_dmic_startup(struct snd_pcm_substream *substream) 325 { 326 struct snd_pcm_runtime *runtime = substream->runtime; 327 328 runtime->hw.channels_min = runtime->hw.channels_max = QUAD_CHANNEL; 329 snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 330 &constraints_channels_quad); 331 332 return snd_pcm_hw_constraint_list(substream->runtime, 0, 333 SNDRV_PCM_HW_PARAM_RATE, &constraints_rates); 334 } 335 336 static struct snd_soc_ops kabylake_dmic_ops = { 337 .startup = kabylake_dmic_startup, 338 }; 339 340 static const unsigned int rates_16000[] = { 341 16000, 342 }; 343 344 static const struct snd_pcm_hw_constraint_list constraints_16000 = { 345 .count = ARRAY_SIZE(rates_16000), 346 .list = rates_16000, 347 }; 348 349 static const unsigned int ch_mono[] = { 350 1, 351 }; 352 353 /* kabylake digital audio interface glue - connects codec <--> CPU */ 354 static struct snd_soc_dai_link kabylake_dais[] = { 355 /* Front End DAI links */ 356 [KBL_DPCM_AUDIO_PB] = { 357 .name = "Kbl Audio Port", 358 .stream_name = "Audio", 359 .cpu_dai_name = "System Pin", 360 .platform_name = "0000:00:1f.3", 361 .dynamic = 1, 362 .codec_name = "snd-soc-dummy", 363 .codec_dai_name = "snd-soc-dummy-dai", 364 .nonatomic = 1, 365 .init = kabylake_da7219_fe_init, 366 .trigger = { 367 SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, 368 .dpcm_playback = 1, 369 .ops = &kabylake_da7219_fe_ops, 370 }, 371 [KBL_DPCM_AUDIO_CP] = { 372 .name = "Kbl Audio Capture Port", 373 .stream_name = "Audio Record", 374 .cpu_dai_name = "System Pin", 375 .platform_name = "0000:00:1f.3", 376 .dynamic = 1, 377 .codec_name = "snd-soc-dummy", 378 .codec_dai_name = "snd-soc-dummy-dai", 379 .nonatomic = 1, 380 .trigger = { 381 SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, 382 .dpcm_capture = 1, 383 .ops = &kabylake_da7219_fe_ops, 384 }, 385 [KBL_DPCM_AUDIO_DMIC_CP] = { 386 .name = "Kbl Audio DMIC cap", 387 .stream_name = "dmiccap", 388 .cpu_dai_name = "DMIC Pin", 389 .codec_name = "snd-soc-dummy", 390 .codec_dai_name = "snd-soc-dummy-dai", 391 .platform_name = "0000:00:1f.3", 392 .init = NULL, 393 .dpcm_capture = 1, 394 .nonatomic = 1, 395 .dynamic = 1, 396 .ops = &kabylake_dmic_ops, 397 }, 398 [KBL_DPCM_AUDIO_HDMI1_PB] = { 399 .name = "Kbl HDMI Port1", 400 .stream_name = "Hdmi1", 401 .cpu_dai_name = "HDMI1 Pin", 402 .codec_name = "snd-soc-dummy", 403 .codec_dai_name = "snd-soc-dummy-dai", 404 .platform_name = "0000:00:1f.3", 405 .dpcm_playback = 1, 406 .init = NULL, 407 .trigger = { 408 SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, 409 .nonatomic = 1, 410 .dynamic = 1, 411 }, 412 [KBL_DPCM_AUDIO_HDMI2_PB] = { 413 .name = "Kbl HDMI Port2", 414 .stream_name = "Hdmi2", 415 .cpu_dai_name = "HDMI2 Pin", 416 .codec_name = "snd-soc-dummy", 417 .codec_dai_name = "snd-soc-dummy-dai", 418 .platform_name = "0000:00:1f.3", 419 .dpcm_playback = 1, 420 .init = NULL, 421 .trigger = { 422 SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, 423 .nonatomic = 1, 424 .dynamic = 1, 425 }, 426 [KBL_DPCM_AUDIO_HDMI3_PB] = { 427 .name = "Kbl HDMI Port3", 428 .stream_name = "Hdmi3", 429 .cpu_dai_name = "HDMI3 Pin", 430 .codec_name = "snd-soc-dummy", 431 .codec_dai_name = "snd-soc-dummy-dai", 432 .platform_name = "0000:00:1f.3", 433 .trigger = { 434 SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, 435 .dpcm_playback = 1, 436 .init = NULL, 437 .nonatomic = 1, 438 .dynamic = 1, 439 }, 440 441 /* Back End DAI links */ 442 { 443 /* SSP0 - Codec */ 444 .name = "SSP0-Codec", 445 .id = 0, 446 .cpu_dai_name = "SSP0 Pin", 447 .platform_name = "0000:00:1f.3", 448 .no_pcm = 1, 449 .codec_name = MAXIM_DEV0_NAME, 450 .codec_dai_name = KBL_MAXIM_CODEC_DAI, 451 .dai_fmt = SND_SOC_DAIFMT_I2S | 452 SND_SOC_DAIFMT_NB_NF | 453 SND_SOC_DAIFMT_CBS_CFS, 454 .ignore_pmdown_time = 1, 455 .be_hw_params_fixup = kabylake_ssp_fixup, 456 .dpcm_playback = 1, 457 }, 458 { 459 /* SSP1 - Codec */ 460 .name = "SSP1-Codec", 461 .id = 1, 462 .cpu_dai_name = "SSP1 Pin", 463 .platform_name = "0000:00:1f.3", 464 .no_pcm = 1, 465 .codec_name = "i2c-DLGS7219:00", 466 .codec_dai_name = KBL_DIALOG_CODEC_DAI, 467 .init = kabylake_da7219_codec_init, 468 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 469 SND_SOC_DAIFMT_CBS_CFS, 470 .ignore_pmdown_time = 1, 471 .be_hw_params_fixup = kabylake_ssp_fixup, 472 .dpcm_playback = 1, 473 .dpcm_capture = 1, 474 }, 475 { 476 .name = "dmic01", 477 .id = 2, 478 .cpu_dai_name = "DMIC01 Pin", 479 .codec_name = "dmic-codec", 480 .codec_dai_name = "dmic-hifi", 481 .platform_name = "0000:00:1f.3", 482 .be_hw_params_fixup = kabylake_dmic_fixup, 483 .ignore_suspend = 1, 484 .dpcm_capture = 1, 485 .no_pcm = 1, 486 }, 487 { 488 .name = "iDisp1", 489 .id = 3, 490 .cpu_dai_name = "iDisp1 Pin", 491 .codec_name = "ehdaudio0D2", 492 .codec_dai_name = "intel-hdmi-hifi1", 493 .platform_name = "0000:00:1f.3", 494 .dpcm_playback = 1, 495 .init = kabylake_hdmi1_init, 496 .no_pcm = 1, 497 }, 498 { 499 .name = "iDisp2", 500 .id = 4, 501 .cpu_dai_name = "iDisp2 Pin", 502 .codec_name = "ehdaudio0D2", 503 .codec_dai_name = "intel-hdmi-hifi2", 504 .platform_name = "0000:00:1f.3", 505 .init = kabylake_hdmi2_init, 506 .dpcm_playback = 1, 507 .no_pcm = 1, 508 }, 509 { 510 .name = "iDisp3", 511 .id = 5, 512 .cpu_dai_name = "iDisp3 Pin", 513 .codec_name = "ehdaudio0D2", 514 .codec_dai_name = "intel-hdmi-hifi3", 515 .platform_name = "0000:00:1f.3", 516 .init = kabylake_hdmi3_init, 517 .dpcm_playback = 1, 518 .no_pcm = 1, 519 }, 520 }; 521 522 #define NAME_SIZE 32 523 static int kabylake_card_late_probe(struct snd_soc_card *card) 524 { 525 struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(card); 526 struct kbl_hdmi_pcm *pcm; 527 struct snd_soc_component *component = NULL; 528 int err, i = 0; 529 char jack_name[NAME_SIZE]; 530 531 list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) { 532 component = pcm->codec_dai->component; 533 snprintf(jack_name, sizeof(jack_name), 534 "HDMI/DP, pcm=%d Jack", pcm->device); 535 err = snd_soc_card_jack_new(card, jack_name, 536 SND_JACK_AVOUT, &skylake_hdmi[i], 537 NULL, 0); 538 539 if (err) 540 return err; 541 542 err = hdac_hdmi_jack_init(pcm->codec_dai, pcm->device, 543 &skylake_hdmi[i]); 544 if (err < 0) 545 return err; 546 547 i++; 548 549 } 550 551 if (!component) 552 return -EINVAL; 553 554 return hdac_hdmi_jack_port_init(component, &card->dapm); 555 } 556 557 /* kabylake audio machine driver for SPT + DA7219 */ 558 static struct snd_soc_card kabylake_audio_card_da7219_m98357a = { 559 .name = "kblda7219max", 560 .owner = THIS_MODULE, 561 .dai_link = kabylake_dais, 562 .num_links = ARRAY_SIZE(kabylake_dais), 563 .controls = kabylake_controls, 564 .num_controls = ARRAY_SIZE(kabylake_controls), 565 .dapm_widgets = kabylake_widgets, 566 .num_dapm_widgets = ARRAY_SIZE(kabylake_widgets), 567 .dapm_routes = kabylake_map, 568 .num_dapm_routes = ARRAY_SIZE(kabylake_map), 569 .fully_routed = true, 570 .late_probe = kabylake_card_late_probe, 571 }; 572 573 static int kabylake_audio_probe(struct platform_device *pdev) 574 { 575 struct kbl_codec_private *ctx; 576 577 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 578 if (!ctx) 579 return -ENOMEM; 580 581 INIT_LIST_HEAD(&ctx->hdmi_pcm_list); 582 583 kabylake_audio_card = 584 (struct snd_soc_card *)pdev->id_entry->driver_data; 585 586 kabylake_audio_card->dev = &pdev->dev; 587 snd_soc_card_set_drvdata(kabylake_audio_card, ctx); 588 return devm_snd_soc_register_card(&pdev->dev, kabylake_audio_card); 589 } 590 591 static const struct platform_device_id kbl_board_ids[] = { 592 { 593 .name = "kbl_da7219_max98357a", 594 .driver_data = 595 (kernel_ulong_t)&kabylake_audio_card_da7219_m98357a, 596 }, 597 { } 598 }; 599 600 static struct platform_driver kabylake_audio = { 601 .probe = kabylake_audio_probe, 602 .driver = { 603 .name = "kbl_da7219_max98357a", 604 .pm = &snd_soc_pm_ops, 605 }, 606 .id_table = kbl_board_ids, 607 }; 608 609 module_platform_driver(kabylake_audio) 610 611 /* Module information */ 612 MODULE_DESCRIPTION("Audio Machine driver-DA7219 & MAX98357A in I2S mode"); 613 MODULE_AUTHOR("Naveen Manohar <naveen.m@intel.com>"); 614 MODULE_LICENSE("GPL v2"); 615 MODULE_ALIAS("platform:kbl_da7219_max98357a"); 616