sound/soc/intel/boards/bxt_da7219_max98357a.c

   1 /*
   2  * Intel Broxton-P I2S Machine Driver
   3  *
   4  * Copyright (C) 2016, Intel Corporation. All rights reserved.
   5  *
   6  * Modified from:
   7  *   Intel Skylake I2S Machine driver
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License version
  11  * 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <sound/core.h>
  22 #include <sound/jack.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include "../../codecs/hdac_hdmi.h"
  27 #include "../../codecs/da7219.h"
  28 #include "../../codecs/da7219-aad.h"
  29
  30 #define BXT_DIALOG_CODEC_DAI    "da7219-hifi"
  31 #define BXT_MAXIM_CODEC_DAI     "HiFi"
  32 #define DUAL_CHANNEL            2
  33 #define QUAD_CHANNEL            4
  34
  35 static struct snd_soc_jack broxton_headset;
  36 static struct snd_soc_jack broxton_hdmi[3];
  37
  38 struct bxt_hdmi_pcm {
  39         struct list_head head;
  40         struct snd_soc_dai *codec_dai;
  41         int device;
  42 };
  43
  44 struct bxt_card_private {
  45         struct list_head hdmi_pcm_list;
  46 };
  47
  48 enum {
  49         BXT_DPCM_AUDIO_PB = 0,
  50         BXT_DPCM_AUDIO_CP,
  51         BXT_DPCM_AUDIO_REF_CP,
  52         BXT_DPCM_AUDIO_DMIC_CP,
  53         BXT_DPCM_AUDIO_HDMI1_PB,
  54         BXT_DPCM_AUDIO_HDMI2_PB,
  55         BXT_DPCM_AUDIO_HDMI3_PB,
  56 };
  57
  58 static inline struct snd_soc_dai *bxt_get_codec_dai(struct snd_soc_card *card)
  59 {
  60         struct snd_soc_pcm_runtime *rtd;
  61
  62         list_for_each_entry(rtd, &card->rtd_list, list) {
  63
  64                 if (!strncmp(rtd->codec_dai->name, BXT_DIALOG_CODEC_DAI,
  65                              strlen(BXT_DIALOG_CODEC_DAI)))
  66                         return rtd->codec_dai;
  67         }
  68
  69         return NULL;
  70 }
  71
  72 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  73         struct snd_kcontrol *k, int  event)
  74 {
  75         int ret = 0;
  76         struct snd_soc_dapm_context *dapm = w->dapm;
  77         struct snd_soc_card *card = dapm->card;
  78         struct snd_soc_dai *codec_dai;
  79
  80         codec_dai = bxt_get_codec_dai(card);
  81         if (!codec_dai) {
  82                 dev_err(card->dev, "Codec dai not found; Unable to set/unset codec pll\n");
  83                 return -EIO;
  84         }
  85
  86         if (SND_SOC_DAPM_EVENT_OFF(event)) {
  87                 ret = snd_soc_dai_set_pll(codec_dai, 0,
  88                         DA7219_SYSCLK_MCLK, 0, 0);
  89                 if (ret)
  90                         dev_err(card->dev, "failed to stop PLL: %d\n", ret);
  91         } else if(SND_SOC_DAPM_EVENT_ON(event)) {
  92                 ret = snd_soc_dai_set_sysclk(codec_dai,
  93                         DA7219_CLKSRC_MCLK, 19200000, SND_SOC_CLOCK_IN);
  94                 if (ret)
  95                         dev_err(card->dev, "can't set codec sysclk configuration\n");
  96
  97                 ret = snd_soc_dai_set_pll(codec_dai, 0,
  98                         DA7219_SYSCLK_PLL_SRM, 0, DA7219_PLL_FREQ_OUT_98304);
  99                 if (ret)
 100                         dev_err(card->dev, "failed to start PLL: %d\n", ret);
 101         }
 102
 103         return ret;
 104 }
 105
 106 static const struct snd_kcontrol_new broxton_controls[] = {
 107         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 108         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 109         SOC_DAPM_PIN_SWITCH("Spk"),
 110 };
 111
 112 static const struct snd_soc_dapm_widget broxton_widgets[] = {
 113         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 114         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 115         SND_SOC_DAPM_SPK("Spk", NULL),
 116         SND_SOC_DAPM_MIC("SoC DMIC", NULL),
 117         SND_SOC_DAPM_SPK("HDMI1", NULL),
 118         SND_SOC_DAPM_SPK("HDMI2", NULL),
 119         SND_SOC_DAPM_SPK("HDMI3", NULL),
 120         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
 121                         platform_clock_control, SND_SOC_DAPM_POST_PMD|SND_SOC_DAPM_PRE_PMU),
 122 };
 123
 124 static const struct snd_soc_dapm_route broxton_map[] = {
 125         /* HP jack connectors - unknown if we have jack detection */
 126         {"Headphone Jack", NULL, "HPL"},
 127         {"Headphone Jack", NULL, "HPR"},
 128
 129         /* speaker */
 130         {"Spk", NULL, "Speaker"},
 131
 132         /* other jacks */
 133         {"MIC", NULL, "Headset Mic"},
 134
 135         /* digital mics */
 136         {"DMic", NULL, "SoC DMIC"},
 137
 138         /* CODEC BE connections */
 139         {"HiFi Playback", NULL, "ssp5 Tx"},
 140         {"ssp5 Tx", NULL, "codec0_out"},
 141
 142         {"Playback", NULL, "ssp1 Tx"},
 143         {"ssp1 Tx", NULL, "codec1_out"},
 144
 145         {"codec0_in", NULL, "ssp1 Rx"},
 146         {"ssp1 Rx", NULL, "Capture"},
 147
 148         {"HDMI1", NULL, "hif5-0 Output"},
 149         {"HDMI2", NULL, "hif6-0 Output"},
 150         {"HDMI2", NULL, "hif7-0 Output"},
 151
 152         {"hifi3", NULL, "iDisp3 Tx"},
 153         {"iDisp3 Tx", NULL, "iDisp3_out"},
 154         {"hifi2", NULL, "iDisp2 Tx"},
 155         {"iDisp2 Tx", NULL, "iDisp2_out"},
 156         {"hifi1", NULL, "iDisp1 Tx"},
 157         {"iDisp1 Tx", NULL, "iDisp1_out"},
 158
 159         /* DMIC */
 160         {"dmic01_hifi", NULL, "DMIC01 Rx"},
 161         {"DMIC01 Rx", NULL, "DMIC AIF"},
 162
 163         { "Headphone Jack", NULL, "Platform Clock" },
 164         { "Headset Mic", NULL, "Platform Clock" },
 165 };
 166
 167 static int broxton_ssp_fixup(struct snd_soc_pcm_runtime *rtd,
 168                         struct snd_pcm_hw_params *params)
 169 {
 170         struct snd_interval *rate = hw_param_interval(params,
 171                         SNDRV_PCM_HW_PARAM_RATE);
 172         struct snd_interval *channels = hw_param_interval(params,
 173                         SNDRV_PCM_HW_PARAM_CHANNELS);
 174         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 175
 176         /* The ADSP will convert the FE rate to 48k, stereo */
 177         rate->min = rate->max = 48000;
 178         channels->min = channels->max = DUAL_CHANNEL;
 179
 180         /* set SSP to 24 bit */
 181         snd_mask_none(fmt);
 182         snd_mask_set(fmt, SNDRV_PCM_FORMAT_S24_LE);
 183
 184         return 0;
 185 }
 186
 187 static int broxton_da7219_codec_init(struct snd_soc_pcm_runtime *rtd)
 188 {
 189         int ret;
 190         struct snd_soc_codec *codec = rtd->codec;
 191
 192         /*
 193          * Headset buttons map to the google Reference headset.
 194          * These can be configured by userspace.
 195          */
 196         ret = snd_soc_card_jack_new(rtd->card, "Headset Jack",
 197                         SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 198                         SND_JACK_BTN_2 | SND_JACK_BTN_3 | SND_JACK_LINEOUT,
 199                         &broxton_headset, NULL, 0);
 200         if (ret) {
 201                 dev_err(rtd->dev, "Headset Jack creation failed: %d\n", ret);
 202                 return ret;
 203         }
 204
 205         da7219_aad_jack_det(codec, &broxton_headset);
 206
 207         snd_soc_dapm_ignore_suspend(&rtd->card->dapm, "SoC DMIC");
 208
 209         return ret;
 210 }
 211
 212 static int broxton_hdmi_init(struct snd_soc_pcm_runtime *rtd)
 213 {
 214         struct bxt_card_private *ctx = snd_soc_card_get_drvdata(rtd->card);
 215         struct snd_soc_dai *dai = rtd->codec_dai;
 216         struct bxt_hdmi_pcm *pcm;
 217
 218         pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL);
 219         if (!pcm)
 220                 return -ENOMEM;
 221
 222         pcm->device = BXT_DPCM_AUDIO_HDMI1_PB + dai->id;
 223         pcm->codec_dai = dai;
 224
 225         list_add_tail(&pcm->head, &ctx->hdmi_pcm_list);
 226
 227         return 0;
 228 }
 229
 230 static int broxton_da7219_fe_init(struct snd_soc_pcm_runtime *rtd)
 231 {
 232         struct snd_soc_dapm_context *dapm;
 233         struct snd_soc_component *component = rtd->cpu_dai->component;
 234
 235         dapm = snd_soc_component_get_dapm(component);
 236         snd_soc_dapm_ignore_suspend(dapm, "Reference Capture");
 237
 238         return 0;
 239 }
 240
 241 static unsigned int rates[] = {
 242         48000,
 243 };
 244
 245 static struct snd_pcm_hw_constraint_list constraints_rates = {
 246         .count = ARRAY_SIZE(rates),
 247         .list  = rates,
 248         .mask = 0,
 249 };
 250
 251 static unsigned int channels[] = {
 252         DUAL_CHANNEL,
 253 };
 254
 255 static struct snd_pcm_hw_constraint_list constraints_channels = {
 256         .count = ARRAY_SIZE(channels),
 257         .list = channels,
 258         .mask = 0,
 259 };
 260
 261 static unsigned int channels_quad[] = {
 262         QUAD_CHANNEL,
 263 };
 264
 265 static struct snd_pcm_hw_constraint_list constraints_channels_quad = {
 266         .count = ARRAY_SIZE(channels_quad),
 267         .list = channels_quad,
 268         .mask = 0,
 269 };
 270
 271 static int bxt_fe_startup(struct snd_pcm_substream *substream)
 272 {
 273         struct snd_pcm_runtime *runtime = substream->runtime;
 274
 275         /*
 276          * On this platform for PCM device we support,
 277          * 48Khz
 278          * stereo
 279          * 16 bit audio
 280          */
 281
 282         runtime->hw.channels_max = DUAL_CHANNEL;
 283         snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 284                                            &constraints_channels);
 285
 286         runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
 287         snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
 288
 289         snd_pcm_hw_constraint_list(runtime, 0,
 290                                 SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 291
 292         return 0;
 293 }
 294
 295 static const struct snd_soc_ops broxton_da7219_fe_ops = {
 296         .startup = bxt_fe_startup,
 297 };
 298
 299 static int broxton_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
 300                         struct snd_pcm_hw_params *params)
 301 {
 302         struct snd_interval *channels = hw_param_interval(params,
 303                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 304         if (params_channels(params) == 2)
 305                 channels->min = channels->max = 2;
 306         else
 307                 channels->min = channels->max = 4;
 308
 309         return 0;
 310 }
 311
 312 static int broxton_dmic_startup(struct snd_pcm_substream *substream)
 313 {
 314         struct snd_pcm_runtime *runtime = substream->runtime;
 315
 316         runtime->hw.channels_min = runtime->hw.channels_max = QUAD_CHANNEL;
 317         snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 318                         &constraints_channels_quad);
 319
 320         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 321                         SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 322 }
 323
 324 static const struct snd_soc_ops broxton_dmic_ops = {
 325         .startup = broxton_dmic_startup,
 326 };
 327
 328 static const unsigned int rates_16000[] = {
 329         16000,
 330 };
 331
 332 static const struct snd_pcm_hw_constraint_list constraints_16000 = {
 333         .count = ARRAY_SIZE(rates_16000),
 334         .list  = rates_16000,
 335 };
 336
 337 static int broxton_refcap_startup(struct snd_pcm_substream *substream)
 338 {
 339         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 340                         SNDRV_PCM_HW_PARAM_RATE,
 341                         &constraints_16000);
 342 };
 343
 344 static const struct snd_soc_ops broxton_refcap_ops = {
 345         .startup = broxton_refcap_startup,
 346 };
 347
 348 /* broxton digital audio interface glue - connects codec <--> CPU */
 349 static struct snd_soc_dai_link broxton_dais[] = {
 350         /* Front End DAI links */
 351         [BXT_DPCM_AUDIO_PB] =
 352         {
 353                 .name = "Bxt Audio Port",
 354                 .stream_name = "Audio",
 355                 .cpu_dai_name = "System Pin",
 356                 .platform_name = "0000:00:0e.0",
 357                 .dynamic = 1,
 358                 .codec_name = "snd-soc-dummy",
 359                 .codec_dai_name = "snd-soc-dummy-dai",
 360                 .nonatomic = 1,
 361                 .init = broxton_da7219_fe_init,
 362                 .trigger = {
 363                         SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
 364                 .dpcm_playback = 1,
 365                 .ops = &broxton_da7219_fe_ops,
 366         },
 367         [BXT_DPCM_AUDIO_CP] =
 368         {
 369                 .name = "Bxt Audio Capture Port",
 370                 .stream_name = "Audio Record",
 371                 .cpu_dai_name = "System Pin",
 372                 .platform_name = "0000:00:0e.0",
 373                 .dynamic = 1,
 374                 .codec_name = "snd-soc-dummy",
 375                 .codec_dai_name = "snd-soc-dummy-dai",
 376                 .nonatomic = 1,
 377                 .trigger = {
 378                         SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
 379                 .dpcm_capture = 1,
 380                 .ops = &broxton_da7219_fe_ops,
 381         },
 382         [BXT_DPCM_AUDIO_REF_CP] =
 383         {
 384                 .name = "Bxt Audio Reference cap",
 385                 .stream_name = "Refcap",
 386                 .cpu_dai_name = "Reference Pin",
 387                 .codec_name = "snd-soc-dummy",
 388                 .codec_dai_name = "snd-soc-dummy-dai",
 389                 .platform_name = "0000:00:0e.0",
 390                 .init = NULL,
 391                 .dpcm_capture = 1,
 392                 .nonatomic = 1,
 393                 .dynamic = 1,
 394                 .ops = &broxton_refcap_ops,
 395         },
 396         [BXT_DPCM_AUDIO_DMIC_CP] =
 397         {
 398                 .name = "Bxt Audio DMIC cap",
 399                 .stream_name = "dmiccap",
 400                 .cpu_dai_name = "DMIC Pin",
 401                 .codec_name = "snd-soc-dummy",
 402                 .codec_dai_name = "snd-soc-dummy-dai",
 403                 .platform_name = "0000:00:0e.0",
 404                 .init = NULL,
 405                 .dpcm_capture = 1,
 406                 .nonatomic = 1,
 407                 .dynamic = 1,
 408                 .ops = &broxton_dmic_ops,
 409         },
 410         [BXT_DPCM_AUDIO_HDMI1_PB] =
 411         {
 412                 .name = "Bxt HDMI Port1",
 413                 .stream_name = "Hdmi1",
 414                 .cpu_dai_name = "HDMI1 Pin",
 415                 .codec_name = "snd-soc-dummy",
 416                 .codec_dai_name = "snd-soc-dummy-dai",
 417                 .platform_name = "0000:00:0e.0",
 418                 .dpcm_playback = 1,
 419                 .init = NULL,
 420                 .nonatomic = 1,
 421                 .dynamic = 1,
 422         },
 423         [BXT_DPCM_AUDIO_HDMI2_PB] =
 424         {
 425                 .name = "Bxt HDMI Port2",
 426                 .stream_name = "Hdmi2",
 427                 .cpu_dai_name = "HDMI2 Pin",
 428                 .codec_name = "snd-soc-dummy",
 429                 .codec_dai_name = "snd-soc-dummy-dai",
 430                 .platform_name = "0000:00:0e.0",
 431                 .dpcm_playback = 1,
 432                 .init = NULL,
 433                 .nonatomic = 1,
 434                 .dynamic = 1,
 435         },
 436         [BXT_DPCM_AUDIO_HDMI3_PB] =
 437         {
 438                 .name = "Bxt HDMI Port3",
 439                 .stream_name = "Hdmi3",
 440                 .cpu_dai_name = "HDMI3 Pin",
 441                 .codec_name = "snd-soc-dummy",
 442                 .codec_dai_name = "snd-soc-dummy-dai",
 443                 .platform_name = "0000:00:0e.0",
 444                 .dpcm_playback = 1,
 445                 .init = NULL,
 446                 .nonatomic = 1,
 447                 .dynamic = 1,
 448         },
 449         /* Back End DAI links */
 450         {
 451                 /* SSP5 - Codec */
 452                 .name = "SSP5-Codec",
 453                 .id = 0,
 454                 .cpu_dai_name = "SSP5 Pin",
 455                 .platform_name = "0000:00:0e.0",
 456                 .no_pcm = 1,
 457                 .codec_name = "MX98357A:00",
 458                 .codec_dai_name = BXT_MAXIM_CODEC_DAI,
 459                 .dai_fmt = SND_SOC_DAIFMT_I2S |
 460                         SND_SOC_DAIFMT_NB_NF |
 461                         SND_SOC_DAIFMT_CBS_CFS,
 462                 .ignore_pmdown_time = 1,
 463                 .be_hw_params_fixup = broxton_ssp_fixup,
 464                 .dpcm_playback = 1,
 465         },
 466         {
 467                 /* SSP1 - Codec */
 468                 .name = "SSP1-Codec",
 469                 .id = 1,
 470                 .cpu_dai_name = "SSP1 Pin",
 471                 .platform_name = "0000:00:0e.0",
 472                 .no_pcm = 1,
 473                 .codec_name = "i2c-DLGS7219:00",
 474                 .codec_dai_name = BXT_DIALOG_CODEC_DAI,
 475                 .init = broxton_da7219_codec_init,
 476                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 477                         SND_SOC_DAIFMT_CBS_CFS,
 478                 .ignore_pmdown_time = 1,
 479                 .be_hw_params_fixup = broxton_ssp_fixup,
 480                 .dpcm_playback = 1,
 481                 .dpcm_capture = 1,
 482         },
 483         {
 484                 .name = "dmic01",
 485                 .id = 2,
 486                 .cpu_dai_name = "DMIC01 Pin",
 487                 .codec_name = "dmic-codec",
 488                 .codec_dai_name = "dmic-hifi",
 489                 .platform_name = "0000:00:0e.0",
 490                 .ignore_suspend = 1,
 491                 .be_hw_params_fixup = broxton_dmic_fixup,
 492                 .dpcm_capture = 1,
 493                 .no_pcm = 1,
 494         },
 495         {
 496                 .name = "iDisp1",
 497                 .id = 3,
 498                 .cpu_dai_name = "iDisp1 Pin",
 499                 .codec_name = "ehdaudio0D2",
 500                 .codec_dai_name = "intel-hdmi-hifi1",
 501                 .platform_name = "0000:00:0e.0",
 502                 .init = broxton_hdmi_init,
 503                 .dpcm_playback = 1,
 504                 .no_pcm = 1,
 505         },
 506         {
 507                 .name = "iDisp2",
 508                 .id = 4,
 509                 .cpu_dai_name = "iDisp2 Pin",
 510                 .codec_name = "ehdaudio0D2",
 511                 .codec_dai_name = "intel-hdmi-hifi2",
 512                 .platform_name = "0000:00:0e.0",
 513                 .init = broxton_hdmi_init,
 514                 .dpcm_playback = 1,
 515                 .no_pcm = 1,
 516         },
 517         {
 518                 .name = "iDisp3",
 519                 .id = 5,
 520                 .cpu_dai_name = "iDisp3 Pin",
 521                 .codec_name = "ehdaudio0D2",
 522                 .codec_dai_name = "intel-hdmi-hifi3",
 523                 .platform_name = "0000:00:0e.0",
 524                 .init = broxton_hdmi_init,
 525                 .dpcm_playback = 1,
 526                 .no_pcm = 1,
 527         },
 528 };
 529
 530 #define NAME_SIZE       32
 531 static int bxt_card_late_probe(struct snd_soc_card *card)
 532 {
 533         struct bxt_card_private *ctx = snd_soc_card_get_drvdata(card);
 534         struct bxt_hdmi_pcm *pcm;
 535         struct snd_soc_codec *codec = NULL;
 536         int err, i = 0;
 537         char jack_name[NAME_SIZE];
 538
 539         list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) {
 540                 codec = pcm->codec_dai->codec;
 541                 snprintf(jack_name, sizeof(jack_name),
 542                         "HDMI/DP, pcm=%d Jack", pcm->device);
 543                 err = snd_soc_card_jack_new(card, jack_name,
 544                                         SND_JACK_AVOUT, &broxton_hdmi[i],
 545                                         NULL, 0);
 546
 547                 if (err)
 548                         return err;
 549
 550                 err = hdac_hdmi_jack_init(pcm->codec_dai, pcm->device,
 551                                                 &broxton_hdmi[i]);
 552                 if (err < 0)
 553                         return err;
 554
 555                 i++;
 556         }
 557
 558         if (!codec)
 559                 return -EINVAL;
 560
 561         return hdac_hdmi_jack_port_init(codec, &card->dapm);
 562 }
 563
 564 /* broxton audio machine driver for SPT + da7219 */
 565 static struct snd_soc_card broxton_audio_card = {
 566         .name = "bxtda7219max",
 567         .owner = THIS_MODULE,
 568         .dai_link = broxton_dais,
 569         .num_links = ARRAY_SIZE(broxton_dais),
 570         .controls = broxton_controls,
 571         .num_controls = ARRAY_SIZE(broxton_controls),
 572         .dapm_widgets = broxton_widgets,
 573         .num_dapm_widgets = ARRAY_SIZE(broxton_widgets),
 574         .dapm_routes = broxton_map,
 575         .num_dapm_routes = ARRAY_SIZE(broxton_map),
 576         .fully_routed = true,
 577         .late_probe = bxt_card_late_probe,
 578 };
 579
 580 static int broxton_audio_probe(struct platform_device *pdev)
 581 {
 582         struct bxt_card_private *ctx;
 583
 584         ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_ATOMIC);
 585         if (!ctx)
 586                 return -ENOMEM;
 587
 588         INIT_LIST_HEAD(&ctx->hdmi_pcm_list);
 589
 590         broxton_audio_card.dev = &pdev->dev;
 591         snd_soc_card_set_drvdata(&broxton_audio_card, ctx);
 592
 593         return devm_snd_soc_register_card(&pdev->dev, &broxton_audio_card);
 594 }
 595
 596 static struct platform_driver broxton_audio = {
 597         .probe = broxton_audio_probe,
 598         .driver = {
 599                 .name = "bxt_da7219_max98357a_i2s",
 600                 .pm = &snd_soc_pm_ops,
 601         },
 602 };
 603 module_platform_driver(broxton_audio)
 604
 605 /* Module information */
 606 MODULE_DESCRIPTION("Audio Machine driver-DA7219 & MAX98357A in I2S mode");
 607 MODULE_AUTHOR("Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>");
 608 MODULE_AUTHOR("Rohit Ainapure <rohit.m.ainapure@intel.com>");
 609 MODULE_AUTHOR("Harsha Priya <harshapriya.n@intel.com>");
 610 MODULE_AUTHOR("Conrad Cooke <conrad.cooke@intel.com>");
 611 MODULE_LICENSE("GPL v2");
 612 MODULE_ALIAS("platform:bxt_da7219_max98357a_i2s");