linux/sound/soc/codecs/hdmi-codec.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * ALSA SoC codec for HDMI encoder drivers
   4 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
   5 * Author: Jyri Sarha <jsarha@ti.com>
   6 */
   7#include <linux/module.h>
   8#include <linux/string.h>
   9#include <sound/core.h>
  10#include <sound/jack.h>
  11#include <sound/pcm.h>
  12#include <sound/pcm_params.h>
  13#include <sound/soc.h>
  14#include <sound/tlv.h>
  15#include <sound/pcm_drm_eld.h>
  16#include <sound/hdmi-codec.h>
  17#include <sound/pcm_iec958.h>
  18
  19#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
  20
  21#define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1
  22
  23struct hdmi_codec_channel_map_table {
  24        unsigned char map;      /* ALSA API channel map position */
  25};
  26
  27/*
  28 * CEA speaker placement for HDMI 1.4:
  29 *
  30 *  FL  FLC   FC   FRC   FR   FRW
  31 *
  32 *                                  LFE
  33 *
  34 *  RL  RLC   RC   RRC   RR
  35 *
  36 *  Speaker placement has to be extended to support HDMI 2.0
  37 */
  38enum hdmi_codec_cea_spk_placement {
  39        FL  = BIT(0),   /* Front Left           */
  40        FC  = BIT(1),   /* Front Center         */
  41        FR  = BIT(2),   /* Front Right          */
  42        FLC = BIT(3),   /* Front Left Center    */
  43        FRC = BIT(4),   /* Front Right Center   */
  44        RL  = BIT(5),   /* Rear Left            */
  45        RC  = BIT(6),   /* Rear Center          */
  46        RR  = BIT(7),   /* Rear Right           */
  47        RLC = BIT(8),   /* Rear Left Center     */
  48        RRC = BIT(9),   /* Rear Right Center    */
  49        LFE = BIT(10),  /* Low Frequency Effect */
  50};
  51
  52/*
  53 * cea Speaker allocation structure
  54 */
  55struct hdmi_codec_cea_spk_alloc {
  56        const int ca_id;
  57        unsigned int n_ch;
  58        unsigned long mask;
  59};
  60
  61/* Channel maps  stereo HDMI */
  62static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
  63        { .channels = 2,
  64          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
  65        { }
  66};
  67
  68/* Channel maps for multi-channel playbacks, up to 8 n_ch */
  69static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
  70        { .channels = 2, /* CA_ID 0x00 */
  71          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
  72        { .channels = 4, /* CA_ID 0x01 */
  73          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  74                   SNDRV_CHMAP_NA } },
  75        { .channels = 4, /* CA_ID 0x02 */
  76          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  77                   SNDRV_CHMAP_FC } },
  78        { .channels = 4, /* CA_ID 0x03 */
  79          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  80                   SNDRV_CHMAP_FC } },
  81        { .channels = 6, /* CA_ID 0x04 */
  82          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  83                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  84        { .channels = 6, /* CA_ID 0x05 */
  85          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  86                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  87        { .channels = 6, /* CA_ID 0x06 */
  88          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  89                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  90        { .channels = 6, /* CA_ID 0x07 */
  91          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  92                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  93        { .channels = 6, /* CA_ID 0x08 */
  94          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  95                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
  96        { .channels = 6, /* CA_ID 0x09 */
  97          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  98                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
  99        { .channels = 6, /* CA_ID 0x0A */
 100          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 101                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 102        { .channels = 6, /* CA_ID 0x0B */
 103          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 104                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 105        { .channels = 8, /* CA_ID 0x0C */
 106          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 107                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 108                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 109        { .channels = 8, /* CA_ID 0x0D */
 110          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 111                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 112                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 113        { .channels = 8, /* CA_ID 0x0E */
 114          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 115                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 116                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 117        { .channels = 8, /* CA_ID 0x0F */
 118          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 119                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 120                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 121        { .channels = 8, /* CA_ID 0x10 */
 122          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 123                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 124                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 125        { .channels = 8, /* CA_ID 0x11 */
 126          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 127                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 128                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 129        { .channels = 8, /* CA_ID 0x12 */
 130          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 131                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 132                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 133        { .channels = 8, /* CA_ID 0x13 */
 134          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 135                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 136                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 137        { .channels = 8, /* CA_ID 0x14 */
 138          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 139                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 140                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 141        { .channels = 8, /* CA_ID 0x15 */
 142          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 143                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 144                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 145        { .channels = 8, /* CA_ID 0x16 */
 146          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 147                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 148                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 149        { .channels = 8, /* CA_ID 0x17 */
 150          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 151                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 152                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 153        { .channels = 8, /* CA_ID 0x18 */
 154          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 155                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 156                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 157        { .channels = 8, /* CA_ID 0x19 */
 158          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 159                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 160                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 161        { .channels = 8, /* CA_ID 0x1A */
 162          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 163                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 164                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 165        { .channels = 8, /* CA_ID 0x1B */
 166          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 167                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 168                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 169        { .channels = 8, /* CA_ID 0x1C */
 170          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 171                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 172                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 173        { .channels = 8, /* CA_ID 0x1D */
 174          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 175                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 176                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 177        { .channels = 8, /* CA_ID 0x1E */
 178          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 179                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 180                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 181        { .channels = 8, /* CA_ID 0x1F */
 182          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 183                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 184                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 185        { }
 186};
 187
 188/*
 189 * hdmi_codec_channel_alloc: speaker configuration available for CEA
 190 *
 191 * This is an ordered list that must match with hdmi_codec_8ch_chmaps struct
 192 * The preceding ones have better chances to be selected by
 193 * hdmi_codec_get_ch_alloc_table_idx().
 194 */
 195static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
 196        { .ca_id = 0x00, .n_ch = 2,
 197          .mask = FL | FR},
 198        /* 2.1 */
 199        { .ca_id = 0x01, .n_ch = 4,
 200          .mask = FL | FR | LFE},
 201        /* Dolby Surround */
 202        { .ca_id = 0x02, .n_ch = 4,
 203          .mask = FL | FR | FC },
 204        /* surround51 */
 205        { .ca_id = 0x0b, .n_ch = 6,
 206          .mask = FL | FR | LFE | FC | RL | RR},
 207        /* surround40 */
 208        { .ca_id = 0x08, .n_ch = 6,
 209          .mask = FL | FR | RL | RR },
 210        /* surround41 */
 211        { .ca_id = 0x09, .n_ch = 6,
 212          .mask = FL | FR | LFE | RL | RR },
 213        /* surround50 */
 214        { .ca_id = 0x0a, .n_ch = 6,
 215          .mask = FL | FR | FC | RL | RR },
 216        /* 6.1 */
 217        { .ca_id = 0x0f, .n_ch = 8,
 218          .mask = FL | FR | LFE | FC | RL | RR | RC },
 219        /* surround71 */
 220        { .ca_id = 0x13, .n_ch = 8,
 221          .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
 222        /* others */
 223        { .ca_id = 0x03, .n_ch = 8,
 224          .mask = FL | FR | LFE | FC },
 225        { .ca_id = 0x04, .n_ch = 8,
 226          .mask = FL | FR | RC},
 227        { .ca_id = 0x05, .n_ch = 8,
 228          .mask = FL | FR | LFE | RC },
 229        { .ca_id = 0x06, .n_ch = 8,
 230          .mask = FL | FR | FC | RC },
 231        { .ca_id = 0x07, .n_ch = 8,
 232          .mask = FL | FR | LFE | FC | RC },
 233        { .ca_id = 0x0c, .n_ch = 8,
 234          .mask = FL | FR | RC | RL | RR },
 235        { .ca_id = 0x0d, .n_ch = 8,
 236          .mask = FL | FR | LFE | RL | RR | RC },
 237        { .ca_id = 0x0e, .n_ch = 8,
 238          .mask = FL | FR | FC | RL | RR | RC },
 239        { .ca_id = 0x10, .n_ch = 8,
 240          .mask = FL | FR | RL | RR | RLC | RRC },
 241        { .ca_id = 0x11, .n_ch = 8,
 242          .mask = FL | FR | LFE | RL | RR | RLC | RRC },
 243        { .ca_id = 0x12, .n_ch = 8,
 244          .mask = FL | FR | FC | RL | RR | RLC | RRC },
 245        { .ca_id = 0x14, .n_ch = 8,
 246          .mask = FL | FR | FLC | FRC },
 247        { .ca_id = 0x15, .n_ch = 8,
 248          .mask = FL | FR | LFE | FLC | FRC },
 249        { .ca_id = 0x16, .n_ch = 8,
 250          .mask = FL | FR | FC | FLC | FRC },
 251        { .ca_id = 0x17, .n_ch = 8,
 252          .mask = FL | FR | LFE | FC | FLC | FRC },
 253        { .ca_id = 0x18, .n_ch = 8,
 254          .mask = FL | FR | RC | FLC | FRC },
 255        { .ca_id = 0x19, .n_ch = 8,
 256          .mask = FL | FR | LFE | RC | FLC | FRC },
 257        { .ca_id = 0x1a, .n_ch = 8,
 258          .mask = FL | FR | RC | FC | FLC | FRC },
 259        { .ca_id = 0x1b, .n_ch = 8,
 260          .mask = FL | FR | LFE | RC | FC | FLC | FRC },
 261        { .ca_id = 0x1c, .n_ch = 8,
 262          .mask = FL | FR | RL | RR | FLC | FRC },
 263        { .ca_id = 0x1d, .n_ch = 8,
 264          .mask = FL | FR | LFE | RL | RR | FLC | FRC },
 265        { .ca_id = 0x1e, .n_ch = 8,
 266          .mask = FL | FR | FC | RL | RR | FLC | FRC },
 267        { .ca_id = 0x1f, .n_ch = 8,
 268          .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
 269};
 270
 271struct hdmi_codec_priv {
 272        struct hdmi_codec_pdata hcd;
 273        uint8_t eld[MAX_ELD_BYTES];
 274        struct snd_pcm_chmap *chmap_info;
 275        unsigned int chmap_idx;
 276        struct mutex lock;
 277        bool busy;
 278        struct snd_soc_jack *jack;
 279        unsigned int jack_status;
 280        u8 iec_status[5];
 281};
 282
 283static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 284        SND_SOC_DAPM_OUTPUT("TX"),
 285        SND_SOC_DAPM_OUTPUT("RX"),
 286};
 287
 288enum {
 289        DAI_ID_I2S = 0,
 290        DAI_ID_SPDIF,
 291};
 292
 293static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
 294                             struct snd_ctl_elem_info *uinfo)
 295{
 296        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 297        uinfo->count = sizeof_field(struct hdmi_codec_priv, eld);
 298
 299        return 0;
 300}
 301
 302static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
 303                            struct snd_ctl_elem_value *ucontrol)
 304{
 305        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 306        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 307
 308        memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
 309
 310        return 0;
 311}
 312
 313static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
 314{
 315        int i;
 316        static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
 317                [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
 318                [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
 319        };
 320        unsigned long spk_mask = 0;
 321
 322        for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
 323                if (spk_alloc & (1 << i))
 324                        spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
 325        }
 326
 327        return spk_mask;
 328}
 329
 330static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
 331{
 332        u8 spk_alloc;
 333        unsigned long spk_mask;
 334
 335        spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 336        spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 337
 338        /* Detect if only stereo supported, else return 8 channels mappings */
 339        if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
 340                hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
 341        else
 342                hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 343}
 344
 345static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
 346                                             unsigned char channels)
 347{
 348        int i;
 349        u8 spk_alloc;
 350        unsigned long spk_mask;
 351        const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
 352
 353        spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 354        spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 355
 356        for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
 357                /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
 358                if (!spk_alloc && cap->ca_id == 0)
 359                        return i;
 360                if (cap->n_ch != channels)
 361                        continue;
 362                if (!(cap->mask == (spk_mask & cap->mask)))
 363                        continue;
 364                return i;
 365        }
 366
 367        return -EINVAL;
 368}
 369static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 370                              struct snd_ctl_elem_value *ucontrol)
 371{
 372        unsigned const char *map;
 373        unsigned int i;
 374        struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 375        struct hdmi_codec_priv *hcp = info->private_data;
 376
 377        map = info->chmap[hcp->chmap_idx].map;
 378
 379        for (i = 0; i < info->max_channels; i++) {
 380                if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
 381                        ucontrol->value.integer.value[i] = 0;
 382                else
 383                        ucontrol->value.integer.value[i] = map[i];
 384        }
 385
 386        return 0;
 387}
 388
 389static int hdmi_codec_iec958_info(struct snd_kcontrol *kcontrol,
 390                                  struct snd_ctl_elem_info *uinfo)
 391{
 392        uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 393        uinfo->count = 1;
 394        return 0;
 395}
 396
 397static int hdmi_codec_iec958_default_get(struct snd_kcontrol *kcontrol,
 398                                         struct snd_ctl_elem_value *ucontrol)
 399{
 400        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 401        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 402
 403        memcpy(ucontrol->value.iec958.status, hcp->iec_status,
 404               sizeof(hcp->iec_status));
 405
 406        return 0;
 407}
 408
 409static int hdmi_codec_iec958_default_put(struct snd_kcontrol *kcontrol,
 410                                         struct snd_ctl_elem_value *ucontrol)
 411{
 412        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 413        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 414
 415        memcpy(hcp->iec_status, ucontrol->value.iec958.status,
 416               sizeof(hcp->iec_status));
 417
 418        return 0;
 419}
 420
 421static int hdmi_codec_iec958_mask_get(struct snd_kcontrol *kcontrol,
 422                                      struct snd_ctl_elem_value *ucontrol)
 423{
 424        memset(ucontrol->value.iec958.status, 0xff,
 425               sizeof_field(struct hdmi_codec_priv, iec_status));
 426
 427        return 0;
 428}
 429
 430static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 431                              struct snd_soc_dai *dai)
 432{
 433        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 434        bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 435        int ret = 0;
 436
 437        mutex_lock(&hcp->lock);
 438        if (hcp->busy) {
 439                dev_err(dai->dev, "Only one simultaneous stream supported!\n");
 440                mutex_unlock(&hcp->lock);
 441                return -EINVAL;
 442        }
 443
 444        if (hcp->hcd.ops->audio_startup) {
 445                ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 446                if (ret)
 447                        goto err;
 448        }
 449
 450        if (tx && hcp->hcd.ops->get_eld) {
 451                ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 452                                            hcp->eld, sizeof(hcp->eld));
 453                if (ret)
 454                        goto err;
 455
 456                ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld);
 457                if (ret)
 458                        goto err;
 459
 460                /* Select chmap supported */
 461                hdmi_codec_eld_chmap(hcp);
 462        }
 463
 464        hcp->busy = true;
 465
 466err:
 467        mutex_unlock(&hcp->lock);
 468        return ret;
 469}
 470
 471static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 472                                struct snd_soc_dai *dai)
 473{
 474        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 475
 476        hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 477        hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 478
 479        mutex_lock(&hcp->lock);
 480        hcp->busy = false;
 481        mutex_unlock(&hcp->lock);
 482}
 483
 484static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai,
 485                                        unsigned int sample_width,
 486                                        unsigned int sample_rate,
 487                                        unsigned int channels,
 488                                        struct hdmi_codec_params *hp)
 489{
 490        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 491        int idx;
 492
 493        /* Select a channel allocation that matches with ELD and pcm channels */
 494        idx = hdmi_codec_get_ch_alloc_table_idx(hcp, channels);
 495        if (idx < 0) {
 496                dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
 497                        idx);
 498                hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 499                return idx;
 500        }
 501
 502        memset(hp, 0, sizeof(*hp));
 503
 504        hdmi_audio_infoframe_init(&hp->cea);
 505        hp->cea.channels = channels;
 506        hp->cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 507        hp->cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 508        hp->cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
 509        hp->cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
 510
 511        hp->sample_width = sample_width;
 512        hp->sample_rate = sample_rate;
 513        hp->channels = channels;
 514
 515        hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
 516
 517        return 0;
 518}
 519
 520static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 521                                struct snd_pcm_hw_params *params,
 522                                struct snd_soc_dai *dai)
 523{
 524        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 525        struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 526        struct hdmi_codec_params hp = {
 527                .iec = {
 528                        .status = { 0 },
 529                        .subcode = { 0 },
 530                        .pad = 0,
 531                        .dig_subframe = { 0 },
 532                }
 533        };
 534        int ret;
 535
 536        if (!hcp->hcd.ops->hw_params)
 537                return 0;
 538
 539        dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 540                params_width(params), params_rate(params),
 541                params_channels(params));
 542
 543        ret = hdmi_codec_fill_codec_params(dai,
 544                                           params_width(params),
 545                                           params_rate(params),
 546                                           params_channels(params),
 547                                           &hp);
 548        if (ret < 0)
 549                return ret;
 550
 551        memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
 552        ret = snd_pcm_fill_iec958_consumer_hw_params(params, hp.iec.status,
 553                                                     sizeof(hp.iec.status));
 554        if (ret < 0) {
 555                dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 556                        ret);
 557                return ret;
 558        }
 559
 560        cf->bit_fmt = params_format(params);
 561        return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
 562                                       cf, &hp);
 563}
 564
 565static int hdmi_codec_prepare(struct snd_pcm_substream *substream,
 566                              struct snd_soc_dai *dai)
 567{
 568        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 569        struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 570        struct snd_pcm_runtime *runtime = substream->runtime;
 571        unsigned int channels = runtime->channels;
 572        unsigned int width = snd_pcm_format_width(runtime->format);
 573        unsigned int rate = runtime->rate;
 574        struct hdmi_codec_params hp;
 575        int ret;
 576
 577        if (!hcp->hcd.ops->prepare)
 578                return 0;
 579
 580        dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 581                width, rate, channels);
 582
 583        ret = hdmi_codec_fill_codec_params(dai, width, rate, channels, &hp);
 584        if (ret < 0)
 585                return ret;
 586
 587        memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
 588        ret = snd_pcm_fill_iec958_consumer(runtime, hp.iec.status,
 589                                           sizeof(hp.iec.status));
 590        if (ret < 0) {
 591                dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 592                        ret);
 593                return ret;
 594        }
 595
 596        cf->bit_fmt = runtime->format;
 597        return hcp->hcd.ops->prepare(dai->dev->parent, hcp->hcd.data,
 598                                     cf, &hp);
 599}
 600
 601static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
 602                                  unsigned int fmt)
 603{
 604        struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 605
 606        /* Reset daifmt */
 607        memset(cf, 0, sizeof(*cf));
 608
 609        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 610        case SND_SOC_DAIFMT_CBM_CFM:
 611                cf->bit_clk_master = 1;
 612                cf->frame_clk_master = 1;
 613                break;
 614        case SND_SOC_DAIFMT_CBS_CFM:
 615                cf->frame_clk_master = 1;
 616                break;
 617        case SND_SOC_DAIFMT_CBM_CFS:
 618                cf->bit_clk_master = 1;
 619                break;
 620        case SND_SOC_DAIFMT_CBS_CFS:
 621                break;
 622        default:
 623                return -EINVAL;
 624        }
 625
 626        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 627        case SND_SOC_DAIFMT_NB_NF:
 628                break;
 629        case SND_SOC_DAIFMT_NB_IF:
 630                cf->frame_clk_inv = 1;
 631                break;
 632        case SND_SOC_DAIFMT_IB_NF:
 633                cf->bit_clk_inv = 1;
 634                break;
 635        case SND_SOC_DAIFMT_IB_IF:
 636                cf->frame_clk_inv = 1;
 637                cf->bit_clk_inv = 1;
 638                break;
 639        }
 640
 641        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 642        case SND_SOC_DAIFMT_I2S:
 643                cf->fmt = HDMI_I2S;
 644                break;
 645        case SND_SOC_DAIFMT_DSP_A:
 646                cf->fmt = HDMI_DSP_A;
 647                break;
 648        case SND_SOC_DAIFMT_DSP_B:
 649                cf->fmt = HDMI_DSP_B;
 650                break;
 651        case SND_SOC_DAIFMT_RIGHT_J:
 652                cf->fmt = HDMI_RIGHT_J;
 653                break;
 654        case SND_SOC_DAIFMT_LEFT_J:
 655                cf->fmt = HDMI_LEFT_J;
 656                break;
 657        case SND_SOC_DAIFMT_AC97:
 658                cf->fmt = HDMI_AC97;
 659                break;
 660        default:
 661                dev_err(dai->dev, "Invalid DAI interface format\n");
 662                return -EINVAL;
 663        }
 664
 665        return 0;
 666}
 667
 668static int hdmi_codec_mute(struct snd_soc_dai *dai, int mute, int direction)
 669{
 670        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 671
 672        /*
 673         * ignore if direction was CAPTURE
 674         * and it had .no_capture_mute flag
 675         * see
 676         *      snd_soc_dai_digital_mute()
 677         */
 678        if (hcp->hcd.ops->mute_stream &&
 679            (direction == SNDRV_PCM_STREAM_PLAYBACK ||
 680             !hcp->hcd.ops->no_capture_mute))
 681                return hcp->hcd.ops->mute_stream(dai->dev->parent,
 682                                                 hcp->hcd.data,
 683                                                 mute, direction);
 684
 685        return -ENOTSUPP;
 686}
 687
 688/*
 689 * This driver can select all SND_SOC_DAIFMT_CBx_CFx,
 690 * but need to be selected from Sound Card, not be auto selected.
 691 * Because it might be used from other driver.
 692 * For example,
 693 *      ${LINUX}/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
 694 */
 695static u64 hdmi_codec_formats =
 696        SND_SOC_POSSIBLE_DAIFMT_NB_NF   |
 697        SND_SOC_POSSIBLE_DAIFMT_NB_IF   |
 698        SND_SOC_POSSIBLE_DAIFMT_IB_NF   |
 699        SND_SOC_POSSIBLE_DAIFMT_IB_IF   |
 700        SND_SOC_POSSIBLE_DAIFMT_I2S     |
 701        SND_SOC_POSSIBLE_DAIFMT_DSP_A   |
 702        SND_SOC_POSSIBLE_DAIFMT_DSP_B   |
 703        SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
 704        SND_SOC_POSSIBLE_DAIFMT_LEFT_J  |
 705        SND_SOC_POSSIBLE_DAIFMT_AC97;
 706
 707static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
 708        .startup        = hdmi_codec_startup,
 709        .shutdown       = hdmi_codec_shutdown,
 710        .hw_params      = hdmi_codec_hw_params,
 711        .prepare        = hdmi_codec_prepare,
 712        .set_fmt        = hdmi_codec_i2s_set_fmt,
 713        .mute_stream    = hdmi_codec_mute,
 714        .auto_selectable_formats        = &hdmi_codec_formats,
 715        .num_auto_selectable_formats    = 1,
 716};
 717
 718static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
 719        .startup        = hdmi_codec_startup,
 720        .shutdown       = hdmi_codec_shutdown,
 721        .hw_params      = hdmi_codec_hw_params,
 722        .mute_stream    = hdmi_codec_mute,
 723};
 724
 725#define HDMI_RATES      (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 726                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 727                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
 728                         SNDRV_PCM_RATE_192000)
 729
 730#define SPDIF_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 731                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 732                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 733                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
 734
 735/*
 736 * This list is only for formats allowed on the I2S bus. So there is
 737 * some formats listed that are not supported by HDMI interface. For
 738 * instance allowing the 32-bit formats enables 24-precision with CPU
 739 * DAIs that do not support 24-bit formats. If the extra formats cause
 740 * problems, we should add the video side driver an option to disable
 741 * them.
 742 */
 743#define I2S_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 744                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 745                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 746                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
 747                         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |\
 748                         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
 749
 750static struct snd_kcontrol_new hdmi_codec_controls[] = {
 751        {
 752                .access = SNDRV_CTL_ELEM_ACCESS_READ,
 753                .iface = SNDRV_CTL_ELEM_IFACE_PCM,
 754                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
 755                .info = hdmi_codec_iec958_info,
 756                .get = hdmi_codec_iec958_mask_get,
 757        },
 758        {
 759                .iface = SNDRV_CTL_ELEM_IFACE_PCM,
 760                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
 761                .info = hdmi_codec_iec958_info,
 762                .get = hdmi_codec_iec958_default_get,
 763                .put = hdmi_codec_iec958_default_put,
 764        },
 765        {
 766                .access = (SNDRV_CTL_ELEM_ACCESS_READ |
 767                           SNDRV_CTL_ELEM_ACCESS_VOLATILE),
 768                .iface  = SNDRV_CTL_ELEM_IFACE_PCM,
 769                .name   = "ELD",
 770                .info   = hdmi_eld_ctl_info,
 771                .get    = hdmi_eld_ctl_get,
 772        },
 773};
 774
 775static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 776                              struct snd_soc_dai *dai)
 777{
 778        struct snd_soc_dai_driver *drv = dai->driver;
 779        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 780        unsigned int i;
 781        int ret;
 782
 783        ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 784                                      NULL, drv->playback.channels_max, 0,
 785                                      &hcp->chmap_info);
 786        if (ret < 0)
 787                return ret;
 788
 789        /* override handlers */
 790        hcp->chmap_info->private_data = hcp;
 791        hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
 792
 793        /* default chmap supported is stereo */
 794        hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 795        hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 796
 797        for (i = 0; i < ARRAY_SIZE(hdmi_codec_controls); i++) {
 798                struct snd_kcontrol *kctl;
 799
 800                /* add ELD ctl with the device number corresponding to the PCM stream */
 801                kctl = snd_ctl_new1(&hdmi_codec_controls[i], dai->component);
 802                if (!kctl)
 803                        return -ENOMEM;
 804
 805                kctl->id.device = rtd->pcm->device;
 806                ret = snd_ctl_add(rtd->card->snd_card, kctl);
 807                if (ret < 0)
 808                        return ret;
 809        }
 810
 811        return 0;
 812}
 813
 814static int hdmi_dai_probe(struct snd_soc_dai *dai)
 815{
 816        struct snd_soc_dapm_context *dapm;
 817        struct hdmi_codec_daifmt *daifmt;
 818        struct snd_soc_dapm_route route[] = {
 819                {
 820                        .sink = "TX",
 821                        .source = dai->driver->playback.stream_name,
 822                },
 823                {
 824                        .sink = dai->driver->capture.stream_name,
 825                        .source = "RX",
 826                },
 827        };
 828        int ret;
 829
 830        dapm = snd_soc_component_get_dapm(dai->component);
 831        ret = snd_soc_dapm_add_routes(dapm, route, 2);
 832        if (ret)
 833                return ret;
 834
 835        daifmt = kzalloc(sizeof(*daifmt), GFP_KERNEL);
 836        if (!daifmt)
 837                return -ENOMEM;
 838
 839        dai->playback_dma_data = daifmt;
 840        return 0;
 841}
 842
 843static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
 844                                   unsigned int jack_status)
 845{
 846        if (hcp->jack && jack_status != hcp->jack_status) {
 847                snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT);
 848                hcp->jack_status = jack_status;
 849        }
 850}
 851
 852static void plugged_cb(struct device *dev, bool plugged)
 853{
 854        struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
 855
 856        if (plugged) {
 857                if (hcp->hcd.ops->get_eld) {
 858                        hcp->hcd.ops->get_eld(dev->parent, hcp->hcd.data,
 859                                            hcp->eld, sizeof(hcp->eld));
 860                }
 861                hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
 862        } else {
 863                hdmi_codec_jack_report(hcp, 0);
 864                memset(hcp->eld, 0, sizeof(hcp->eld));
 865        }
 866}
 867
 868static int hdmi_codec_set_jack(struct snd_soc_component *component,
 869                               struct snd_soc_jack *jack,
 870                               void *data)
 871{
 872        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 873        int ret = -ENOTSUPP;
 874
 875        if (hcp->hcd.ops->hook_plugged_cb) {
 876                hcp->jack = jack;
 877                ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
 878                                                    hcp->hcd.data,
 879                                                    plugged_cb,
 880                                                    component->dev);
 881                if (ret)
 882                        hcp->jack = NULL;
 883        }
 884        return ret;
 885}
 886
 887static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai)
 888{
 889        struct hdmi_codec_daifmt *cf;
 890        int ret;
 891
 892        ret = hdmi_dai_probe(dai);
 893        if (ret)
 894                return ret;
 895
 896        cf = dai->playback_dma_data;
 897        cf->fmt = HDMI_SPDIF;
 898
 899        return 0;
 900}
 901
 902static int hdmi_codec_dai_remove(struct snd_soc_dai *dai)
 903{
 904        kfree(dai->playback_dma_data);
 905        return 0;
 906}
 907
 908static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 909        .name = "i2s-hifi",
 910        .id = DAI_ID_I2S,
 911        .probe = hdmi_dai_probe,
 912        .remove = hdmi_codec_dai_remove,
 913        .playback = {
 914                .stream_name = "I2S Playback",
 915                .channels_min = 2,
 916                .channels_max = 8,
 917                .rates = HDMI_RATES,
 918                .formats = I2S_FORMATS,
 919                .sig_bits = 24,
 920        },
 921        .capture = {
 922                .stream_name = "Capture",
 923                .channels_min = 2,
 924                .channels_max = 8,
 925                .rates = HDMI_RATES,
 926                .formats = I2S_FORMATS,
 927                .sig_bits = 24,
 928        },
 929        .ops = &hdmi_codec_i2s_dai_ops,
 930        .pcm_new = hdmi_codec_pcm_new,
 931};
 932
 933static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 934        .name = "spdif-hifi",
 935        .id = DAI_ID_SPDIF,
 936        .probe = hdmi_dai_spdif_probe,
 937        .remove = hdmi_codec_dai_remove,
 938        .playback = {
 939                .stream_name = "SPDIF Playback",
 940                .channels_min = 2,
 941                .channels_max = 2,
 942                .rates = HDMI_RATES,
 943                .formats = SPDIF_FORMATS,
 944        },
 945        .capture = {
 946                .stream_name = "Capture",
 947                .channels_min = 2,
 948                .channels_max = 2,
 949                .rates = HDMI_RATES,
 950                .formats = SPDIF_FORMATS,
 951        },
 952        .ops = &hdmi_codec_spdif_dai_ops,
 953        .pcm_new = hdmi_codec_pcm_new,
 954};
 955
 956static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
 957                                 struct device_node *endpoint)
 958{
 959        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 960        int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
 961
 962        if (hcp->hcd.ops->get_dai_id)
 963                ret = hcp->hcd.ops->get_dai_id(component, endpoint);
 964
 965        return ret;
 966}
 967
 968static void hdmi_remove(struct snd_soc_component *component)
 969{
 970        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 971
 972        if (hcp->hcd.ops->hook_plugged_cb)
 973                hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
 974                                              hcp->hcd.data, NULL, NULL);
 975}
 976
 977static const struct snd_soc_component_driver hdmi_driver = {
 978        .remove                 = hdmi_remove,
 979        .dapm_widgets           = hdmi_widgets,
 980        .num_dapm_widgets       = ARRAY_SIZE(hdmi_widgets),
 981        .of_xlate_dai_id        = hdmi_of_xlate_dai_id,
 982        .idle_bias_on           = 1,
 983        .use_pmdown_time        = 1,
 984        .endianness             = 1,
 985        .non_legacy_dai_naming  = 1,
 986        .set_jack               = hdmi_codec_set_jack,
 987};
 988
 989static int hdmi_codec_probe(struct platform_device *pdev)
 990{
 991        struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 992        struct snd_soc_dai_driver *daidrv;
 993        struct device *dev = &pdev->dev;
 994        struct hdmi_codec_priv *hcp;
 995        int dai_count, i = 0;
 996        int ret;
 997
 998        if (!hcd) {
 999                dev_err(dev, "%s: No platform data\n", __func__);
1000                return -EINVAL;
1001        }
1002
1003        dai_count = hcd->i2s + hcd->spdif;
1004        if (dai_count < 1 || !hcd->ops ||
1005            (!hcd->ops->hw_params && !hcd->ops->prepare) ||
1006            !hcd->ops->audio_shutdown) {
1007                dev_err(dev, "%s: Invalid parameters\n", __func__);
1008                return -EINVAL;
1009        }
1010
1011        hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
1012        if (!hcp)
1013                return -ENOMEM;
1014
1015        hcp->hcd = *hcd;
1016        mutex_init(&hcp->lock);
1017
1018        ret = snd_pcm_create_iec958_consumer_default(hcp->iec_status,
1019                                                     sizeof(hcp->iec_status));
1020        if (ret < 0)
1021                return ret;
1022
1023        daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
1024        if (!daidrv)
1025                return -ENOMEM;
1026
1027        if (hcd->i2s) {
1028                daidrv[i] = hdmi_i2s_dai;
1029                daidrv[i].playback.channels_max = hcd->max_i2s_channels;
1030                i++;
1031        }
1032
1033        if (hcd->spdif)
1034                daidrv[i] = hdmi_spdif_dai;
1035
1036        dev_set_drvdata(dev, hcp);
1037
1038        ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
1039                                              dai_count);
1040        if (ret) {
1041                dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
1042                        __func__, ret);
1043                return ret;
1044        }
1045        return 0;
1046}
1047
1048static struct platform_driver hdmi_codec_driver = {
1049        .driver = {
1050                .name = HDMI_CODEC_DRV_NAME,
1051        },
1052        .probe = hdmi_codec_probe,
1053};
1054
1055module_platform_driver(hdmi_codec_driver);
1056
1057MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
1058MODULE_DESCRIPTION("HDMI Audio Codec Driver");
1059MODULE_LICENSE("GPL");
1060MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);
1061