sound/soc/codecs/hdmi-codec.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ALSA SoC codec for HDMI encoder drivers
   4  * Copyright (C) 2015 Texas Instruments Incorporated - http://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/pcm.h>
  11 #include <sound/pcm_params.h>
  12 #include <sound/soc.h>
  13 #include <sound/tlv.h>
  14 #include <sound/pcm_drm_eld.h>
  15 #include <sound/hdmi-codec.h>
  16 #include <sound/pcm_iec958.h>
  17
  18 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
  19
  20 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1
  21
  22 struct hdmi_codec_channel_map_table {
  23         unsigned char map;      /* ALSA API channel map position */
  24         unsigned long spk_mask;         /* speaker position bit mask */
  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  */
  38 enum 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  */
  55 struct 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 */
  62 static 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 */
  69 static 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  */
 195 static 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
 271 struct hdmi_codec_priv {
 272         struct hdmi_codec_pdata hcd;
 273         struct snd_soc_dai_driver *daidrv;
 274         struct hdmi_codec_daifmt daifmt[2];
 275         struct mutex current_stream_lock;
 276         struct snd_pcm_substream *current_stream;
 277         uint8_t eld[MAX_ELD_BYTES];
 278         struct snd_pcm_chmap *chmap_info;
 279         unsigned int chmap_idx;
 280 };
 281
 282 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 283         SND_SOC_DAPM_OUTPUT("TX"),
 284 };
 285
 286 enum {
 287         DAI_ID_I2S = 0,
 288         DAI_ID_SPDIF,
 289 };
 290
 291 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
 292                              struct snd_ctl_elem_info *uinfo)
 293 {
 294         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 295         uinfo->count = FIELD_SIZEOF(struct hdmi_codec_priv, eld);
 296
 297         return 0;
 298 }
 299
 300 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
 301                             struct snd_ctl_elem_value *ucontrol)
 302 {
 303         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 304         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 305
 306         memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
 307
 308         return 0;
 309 }
 310
 311 static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
 312 {
 313         int i;
 314         static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
 315                 [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
 316                 [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
 317         };
 318         unsigned long spk_mask = 0;
 319
 320         for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
 321                 if (spk_alloc & (1 << i))
 322                         spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
 323         }
 324
 325         return spk_mask;
 326 }
 327
 328 static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
 329 {
 330         u8 spk_alloc;
 331         unsigned long spk_mask;
 332
 333         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 334         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 335
 336         /* Detect if only stereo supported, else return 8 channels mappings */
 337         if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
 338                 hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
 339         else
 340                 hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 341 }
 342
 343 static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
 344                                              unsigned char channels)
 345 {
 346         int i;
 347         u8 spk_alloc;
 348         unsigned long spk_mask;
 349         const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
 350
 351         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 352         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 353
 354         for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
 355                 /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
 356                 if (!spk_alloc && cap->ca_id == 0)
 357                         return i;
 358                 if (cap->n_ch != channels)
 359                         continue;
 360                 if (!(cap->mask == (spk_mask & cap->mask)))
 361                         continue;
 362                 return i;
 363         }
 364
 365         return -EINVAL;
 366 }
 367 static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 368                               struct snd_ctl_elem_value *ucontrol)
 369 {
 370         unsigned const char *map;
 371         unsigned int i;
 372         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 373         struct hdmi_codec_priv *hcp = info->private_data;
 374
 375         map = info->chmap[hcp->chmap_idx].map;
 376
 377         for (i = 0; i < info->max_channels; i++) {
 378                 if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
 379                         ucontrol->value.integer.value[i] = 0;
 380                 else
 381                         ucontrol->value.integer.value[i] = map[i];
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
 388                                  struct snd_soc_dai *dai)
 389 {
 390         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 391         int ret = 0;
 392
 393         mutex_lock(&hcp->current_stream_lock);
 394         if (!hcp->current_stream) {
 395                 hcp->current_stream = substream;
 396         } else if (hcp->current_stream != substream) {
 397                 dev_err(dai->dev, "Only one simultaneous stream supported!\n");
 398                 ret = -EINVAL;
 399         }
 400         mutex_unlock(&hcp->current_stream_lock);
 401
 402         return ret;
 403 }
 404
 405 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 406                               struct snd_soc_dai *dai)
 407 {
 408         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 409         int ret = 0;
 410
 411         dev_dbg(dai->dev, "%s()\n", __func__);
 412
 413         ret = hdmi_codec_new_stream(substream, dai);
 414         if (ret)
 415                 return ret;
 416
 417         if (hcp->hcd.ops->audio_startup) {
 418                 ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 419                 if (ret) {
 420                         mutex_lock(&hcp->current_stream_lock);
 421                         hcp->current_stream = NULL;
 422                         mutex_unlock(&hcp->current_stream_lock);
 423                         return ret;
 424                 }
 425         }
 426
 427         if (hcp->hcd.ops->get_eld) {
 428                 ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 429                                             hcp->eld, sizeof(hcp->eld));
 430
 431                 if (!ret) {
 432                         ret = snd_pcm_hw_constraint_eld(substream->runtime,
 433                                                         hcp->eld);
 434                         if (ret) {
 435                                 mutex_lock(&hcp->current_stream_lock);
 436                                 hcp->current_stream = NULL;
 437                                 mutex_unlock(&hcp->current_stream_lock);
 438                                 return ret;
 439                         }
 440                 }
 441                 /* Select chmap supported */
 442                 hdmi_codec_eld_chmap(hcp);
 443         }
 444         return 0;
 445 }
 446
 447 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 448                                 struct snd_soc_dai *dai)
 449 {
 450         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 451
 452         dev_dbg(dai->dev, "%s()\n", __func__);
 453
 454         WARN_ON(hcp->current_stream != substream);
 455
 456         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 457         hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 458
 459         mutex_lock(&hcp->current_stream_lock);
 460         hcp->current_stream = NULL;
 461         mutex_unlock(&hcp->current_stream_lock);
 462 }
 463
 464 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 465                                 struct snd_pcm_hw_params *params,
 466                                 struct snd_soc_dai *dai)
 467 {
 468         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 469         struct hdmi_codec_params hp = {
 470                 .iec = {
 471                         .status = { 0 },
 472                         .subcode = { 0 },
 473                         .pad = 0,
 474                         .dig_subframe = { 0 },
 475                 }
 476         };
 477         int ret, idx;
 478
 479         dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 480                 params_width(params), params_rate(params),
 481                 params_channels(params));
 482
 483         ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
 484                                                        sizeof(hp.iec.status));
 485         if (ret < 0) {
 486                 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 487                         ret);
 488                 return ret;
 489         }
 490
 491         hdmi_audio_infoframe_init(&hp.cea);
 492         hp.cea.channels = params_channels(params);
 493         hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 494         hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 495         hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
 496
 497         /* Select a channel allocation that matches with ELD and pcm channels */
 498         idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels);
 499         if (idx < 0) {
 500                 dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
 501                         idx);
 502                 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 503                 return idx;
 504         }
 505         hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
 506         hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
 507
 508         hp.sample_width = params_width(params);
 509         hp.sample_rate = params_rate(params);
 510         hp.channels = params_channels(params);
 511
 512         return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
 513                                        &hcp->daifmt[dai->id], &hp);
 514 }
 515
 516 static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
 517                               unsigned int fmt)
 518 {
 519         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 520         struct hdmi_codec_daifmt cf = { 0 };
 521
 522         dev_dbg(dai->dev, "%s()\n", __func__);
 523
 524         if (dai->id == DAI_ID_SPDIF)
 525                 return 0;
 526
 527         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 528         case SND_SOC_DAIFMT_CBM_CFM:
 529                 cf.bit_clk_master = 1;
 530                 cf.frame_clk_master = 1;
 531                 break;
 532         case SND_SOC_DAIFMT_CBS_CFM:
 533                 cf.frame_clk_master = 1;
 534                 break;
 535         case SND_SOC_DAIFMT_CBM_CFS:
 536                 cf.bit_clk_master = 1;
 537                 break;
 538         case SND_SOC_DAIFMT_CBS_CFS:
 539                 break;
 540         default:
 541                 return -EINVAL;
 542         }
 543
 544         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 545         case SND_SOC_DAIFMT_NB_NF:
 546                 break;
 547         case SND_SOC_DAIFMT_NB_IF:
 548                 cf.frame_clk_inv = 1;
 549                 break;
 550         case SND_SOC_DAIFMT_IB_NF:
 551                 cf.bit_clk_inv = 1;
 552                 break;
 553         case SND_SOC_DAIFMT_IB_IF:
 554                 cf.frame_clk_inv = 1;
 555                 cf.bit_clk_inv = 1;
 556                 break;
 557         }
 558
 559         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 560         case SND_SOC_DAIFMT_I2S:
 561                 cf.fmt = HDMI_I2S;
 562                 break;
 563         case SND_SOC_DAIFMT_DSP_A:
 564                 cf.fmt = HDMI_DSP_A;
 565                 break;
 566         case SND_SOC_DAIFMT_DSP_B:
 567                 cf.fmt = HDMI_DSP_B;
 568                 break;
 569         case SND_SOC_DAIFMT_RIGHT_J:
 570                 cf.fmt = HDMI_RIGHT_J;
 571                 break;
 572         case SND_SOC_DAIFMT_LEFT_J:
 573                 cf.fmt = HDMI_LEFT_J;
 574                 break;
 575         case SND_SOC_DAIFMT_AC97:
 576                 cf.fmt = HDMI_AC97;
 577                 break;
 578         default:
 579                 dev_err(dai->dev, "Invalid DAI interface format\n");
 580                 return -EINVAL;
 581         }
 582
 583         hcp->daifmt[dai->id] = cf;
 584
 585         return 0;
 586 }
 587
 588 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 589 {
 590         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 591
 592         dev_dbg(dai->dev, "%s()\n", __func__);
 593
 594         if (hcp->hcd.ops->digital_mute)
 595                 return hcp->hcd.ops->digital_mute(dai->dev->parent,
 596                                                   hcp->hcd.data, mute);
 597
 598         return 0;
 599 }
 600
 601 static const struct snd_soc_dai_ops hdmi_dai_ops = {
 602         .startup        = hdmi_codec_startup,
 603         .shutdown       = hdmi_codec_shutdown,
 604         .hw_params      = hdmi_codec_hw_params,
 605         .set_fmt        = hdmi_codec_set_fmt,
 606         .digital_mute   = hdmi_codec_digital_mute,
 607 };
 608
 609
 610 #define HDMI_RATES      (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 611                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 612                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
 613                          SNDRV_PCM_RATE_192000)
 614
 615 #define SPDIF_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 616                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 617                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 618                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
 619
 620 /*
 621  * This list is only for formats allowed on the I2S bus. So there is
 622  * some formats listed that are not supported by HDMI interface. For
 623  * instance allowing the 32-bit formats enables 24-precision with CPU
 624  * DAIs that do not support 24-bit formats. If the extra formats cause
 625  * problems, we should add the video side driver an option to disable
 626  * them.
 627  */
 628 #define I2S_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 629                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 630                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 631                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
 632                          SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
 633
 634 static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 635                               struct snd_soc_dai *dai)
 636 {
 637         struct snd_soc_dai_driver *drv = dai->driver;
 638         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 639         struct snd_kcontrol *kctl;
 640         struct snd_kcontrol_new hdmi_eld_ctl = {
 641                 .access = SNDRV_CTL_ELEM_ACCESS_READ |
 642                           SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 643                 .iface  = SNDRV_CTL_ELEM_IFACE_PCM,
 644                 .name   = "ELD",
 645                 .info   = hdmi_eld_ctl_info,
 646                 .get    = hdmi_eld_ctl_get,
 647                 .device = rtd->pcm->device,
 648         };
 649         int ret;
 650
 651         dev_dbg(dai->dev, "%s()\n", __func__);
 652
 653         ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 654                                       NULL, drv->playback.channels_max, 0,
 655                                       &hcp->chmap_info);
 656         if (ret < 0)
 657                 return ret;
 658
 659         /* override handlers */
 660         hcp->chmap_info->private_data = hcp;
 661         hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
 662
 663         /* default chmap supported is stereo */
 664         hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 665         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 666
 667         /* add ELD ctl with the device number corresponding to the PCM stream */
 668         kctl = snd_ctl_new1(&hdmi_eld_ctl, dai->component);
 669         if (!kctl)
 670                 return -ENOMEM;
 671
 672         return snd_ctl_add(rtd->card->snd_card, kctl);
 673 }
 674
 675 static int hdmi_dai_probe(struct snd_soc_dai *dai)
 676 {
 677         struct snd_soc_dapm_context *dapm;
 678         struct snd_soc_dapm_route route = {
 679                 .sink = "TX",
 680                 .source = dai->driver->playback.stream_name,
 681         };
 682
 683         dapm = snd_soc_component_get_dapm(dai->component);
 684
 685         return snd_soc_dapm_add_routes(dapm, &route, 1);
 686 }
 687
 688 static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 689         .name = "i2s-hifi",
 690         .id = DAI_ID_I2S,
 691         .probe = hdmi_dai_probe,
 692         .playback = {
 693                 .stream_name = "I2S Playback",
 694                 .channels_min = 2,
 695                 .channels_max = 8,
 696                 .rates = HDMI_RATES,
 697                 .formats = I2S_FORMATS,
 698                 .sig_bits = 24,
 699         },
 700         .ops = &hdmi_dai_ops,
 701         .pcm_new = hdmi_codec_pcm_new,
 702 };
 703
 704 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 705         .name = "spdif-hifi",
 706         .id = DAI_ID_SPDIF,
 707         .probe = hdmi_dai_probe,
 708         .playback = {
 709                 .stream_name = "SPDIF Playback",
 710                 .channels_min = 2,
 711                 .channels_max = 2,
 712                 .rates = HDMI_RATES,
 713                 .formats = SPDIF_FORMATS,
 714         },
 715         .ops = &hdmi_dai_ops,
 716         .pcm_new = hdmi_codec_pcm_new,
 717 };
 718
 719 static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
 720                                  struct device_node *endpoint)
 721 {
 722         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 723         int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
 724
 725         if (hcp->hcd.ops->get_dai_id)
 726                 ret = hcp->hcd.ops->get_dai_id(component, endpoint);
 727
 728         return ret;
 729 }
 730
 731 static const struct snd_soc_component_driver hdmi_driver = {
 732         .dapm_widgets           = hdmi_widgets,
 733         .num_dapm_widgets       = ARRAY_SIZE(hdmi_widgets),
 734         .of_xlate_dai_id        = hdmi_of_xlate_dai_id,
 735         .idle_bias_on           = 1,
 736         .use_pmdown_time        = 1,
 737         .endianness             = 1,
 738         .non_legacy_dai_naming  = 1,
 739 };
 740
 741 static int hdmi_codec_probe(struct platform_device *pdev)
 742 {
 743         struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 744         struct device *dev = &pdev->dev;
 745         struct hdmi_codec_priv *hcp;
 746         int dai_count, i = 0;
 747         int ret;
 748
 749         dev_dbg(dev, "%s()\n", __func__);
 750
 751         if (!hcd) {
 752                 dev_err(dev, "%s: No platform data\n", __func__);
 753                 return -EINVAL;
 754         }
 755
 756         dai_count = hcd->i2s + hcd->spdif;
 757         if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
 758             !hcd->ops->audio_shutdown) {
 759                 dev_err(dev, "%s: Invalid parameters\n", __func__);
 760                 return -EINVAL;
 761         }
 762
 763         hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
 764         if (!hcp)
 765                 return -ENOMEM;
 766
 767         hcp->hcd = *hcd;
 768         mutex_init(&hcp->current_stream_lock);
 769
 770         hcp->daidrv = devm_kcalloc(dev, dai_count, sizeof(*hcp->daidrv),
 771                                    GFP_KERNEL);
 772         if (!hcp->daidrv)
 773                 return -ENOMEM;
 774
 775         if (hcd->i2s) {
 776                 hcp->daidrv[i] = hdmi_i2s_dai;
 777                 hcp->daidrv[i].playback.channels_max =
 778                         hcd->max_i2s_channels;
 779                 i++;
 780         }
 781
 782         if (hcd->spdif) {
 783                 hcp->daidrv[i] = hdmi_spdif_dai;
 784                 hcp->daifmt[DAI_ID_SPDIF].fmt = HDMI_SPDIF;
 785         }
 786
 787         dev_set_drvdata(dev, hcp);
 788
 789         ret = devm_snd_soc_register_component(dev, &hdmi_driver, hcp->daidrv,
 790                                      dai_count);
 791         if (ret) {
 792                 dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
 793                         __func__, ret);
 794                 return ret;
 795         }
 796         return 0;
 797 }
 798
 799 static struct platform_driver hdmi_codec_driver = {
 800         .driver = {
 801                 .name = HDMI_CODEC_DRV_NAME,
 802         },
 803         .probe = hdmi_codec_probe,
 804 };
 805
 806 module_platform_driver(hdmi_codec_driver);
 807
 808 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
 809 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
 810 MODULE_LICENSE("GPL");
 811 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);