sound/soc/codecs/hdmi-codec.c

   1 /*
   2  * ALSA SoC codec for HDMI encoder drivers
   3  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Jyri Sarha <jsarha@ti.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  */
  15 #include <linux/module.h>
  16 #include <linux/string.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/tlv.h>
  22 #include <sound/pcm_drm_eld.h>
  23 #include <sound/hdmi-codec.h>
  24 #include <sound/pcm_iec958.h>
  25
  26 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
  27
  28 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1
  29
  30 struct hdmi_codec_channel_map_table {
  31         unsigned char map;      /* ALSA API channel map position */
  32         unsigned long spk_mask;         /* speaker position bit mask */
  33 };
  34
  35 /*
  36  * CEA speaker placement for HDMI 1.4:
  37  *
  38  *  FL  FLC   FC   FRC   FR   FRW
  39  *
  40  *                                  LFE
  41  *
  42  *  RL  RLC   RC   RRC   RR
  43  *
  44  *  Speaker placement has to be extended to support HDMI 2.0
  45  */
  46 enum hdmi_codec_cea_spk_placement {
  47         FL  = BIT(0),   /* Front Left           */
  48         FC  = BIT(1),   /* Front Center         */
  49         FR  = BIT(2),   /* Front Right          */
  50         FLC = BIT(3),   /* Front Left Center    */
  51         FRC = BIT(4),   /* Front Right Center   */
  52         RL  = BIT(5),   /* Rear Left            */
  53         RC  = BIT(6),   /* Rear Center          */
  54         RR  = BIT(7),   /* Rear Right           */
  55         RLC = BIT(8),   /* Rear Left Center     */
  56         RRC = BIT(9),   /* Rear Right Center    */
  57         LFE = BIT(10),  /* Low Frequency Effect */
  58 };
  59
  60 /*
  61  * cea Speaker allocation structure
  62  */
  63 struct hdmi_codec_cea_spk_alloc {
  64         const int ca_id;
  65         unsigned int n_ch;
  66         unsigned long mask;
  67 };
  68
  69 /* Channel maps  stereo HDMI */
  70 static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
  71         { .channels = 2,
  72           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
  73         { }
  74 };
  75
  76 /* Channel maps for multi-channel playbacks, up to 8 n_ch */
  77 static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
  78         { .channels = 2, /* CA_ID 0x00 */
  79           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
  80         { .channels = 4, /* CA_ID 0x01 */
  81           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  82                    SNDRV_CHMAP_NA } },
  83         { .channels = 4, /* CA_ID 0x02 */
  84           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  85                    SNDRV_CHMAP_FC } },
  86         { .channels = 4, /* CA_ID 0x03 */
  87           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  88                    SNDRV_CHMAP_FC } },
  89         { .channels = 6, /* CA_ID 0x04 */
  90           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  91                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  92         { .channels = 6, /* CA_ID 0x05 */
  93           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
  94                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  95         { .channels = 6, /* CA_ID 0x06 */
  96           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
  97                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
  98         { .channels = 6, /* CA_ID 0x07 */
  99           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 100                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 101         { .channels = 6, /* CA_ID 0x08 */
 102           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 103                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 104         { .channels = 6, /* CA_ID 0x09 */
 105           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 106                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 107         { .channels = 6, /* CA_ID 0x0A */
 108           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 109                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 110         { .channels = 6, /* CA_ID 0x0B */
 111           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 112                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
 113         { .channels = 8, /* CA_ID 0x0C */
 114           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 115                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 116                    SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 117         { .channels = 8, /* CA_ID 0x0D */
 118           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 119                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 120                    SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 121         { .channels = 8, /* CA_ID 0x0E */
 122           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 123                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 124                    SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 125         { .channels = 8, /* CA_ID 0x0F */
 126           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 127                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 128                    SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
 129         { .channels = 8, /* CA_ID 0x10 */
 130           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 131                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 132                    SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 133         { .channels = 8, /* CA_ID 0x11 */
 134           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 135                    SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 136                    SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 137         { .channels = 8, /* CA_ID 0x12 */
 138           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 139                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 140                    SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 141         { .channels = 8, /* CA_ID 0x13 */
 142           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 143                    SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
 144                    SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
 145         { .channels = 8, /* CA_ID 0x14 */
 146           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 147                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 148                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 149         { .channels = 8, /* CA_ID 0x15 */
 150           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 151                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 152                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 153         { .channels = 8, /* CA_ID 0x16 */
 154           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 155                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 156                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 157         { .channels = 8, /* CA_ID 0x17 */
 158           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 159                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 160                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 161         { .channels = 8, /* CA_ID 0x18 */
 162           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 163                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 164                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 165         { .channels = 8, /* CA_ID 0x19 */
 166           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 167                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 168                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 169         { .channels = 8, /* CA_ID 0x1A */
 170           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 171                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 172                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 173         { .channels = 8, /* CA_ID 0x1B */
 174           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 175                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 176                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 177         { .channels = 8, /* CA_ID 0x1C */
 178           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 179                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 180                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 181         { .channels = 8, /* CA_ID 0x1D */
 182           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 183                    SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 184                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 185         { .channels = 8, /* CA_ID 0x1E */
 186           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
 187                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 188                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 189         { .channels = 8, /* CA_ID 0x1F */
 190           .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
 191                    SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
 192                    SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
 193         { }
 194 };
 195
 196 /*
 197  * hdmi_codec_channel_alloc: speaker configuration available for CEA
 198  *
 199  * This is an ordered list that must match with hdmi_codec_8ch_chmaps struct
 200  * The preceding ones have better chances to be selected by
 201  * hdmi_codec_get_ch_alloc_table_idx().
 202  */
 203 static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
 204         { .ca_id = 0x00, .n_ch = 2,
 205           .mask = FL | FR},
 206         /* 2.1 */
 207         { .ca_id = 0x01, .n_ch = 4,
 208           .mask = FL | FR | LFE},
 209         /* Dolby Surround */
 210         { .ca_id = 0x02, .n_ch = 4,
 211           .mask = FL | FR | FC },
 212         /* surround51 */
 213         { .ca_id = 0x0b, .n_ch = 6,
 214           .mask = FL | FR | LFE | FC | RL | RR},
 215         /* surround40 */
 216         { .ca_id = 0x08, .n_ch = 6,
 217           .mask = FL | FR | RL | RR },
 218         /* surround41 */
 219         { .ca_id = 0x09, .n_ch = 6,
 220           .mask = FL | FR | LFE | RL | RR },
 221         /* surround50 */
 222         { .ca_id = 0x0a, .n_ch = 6,
 223           .mask = FL | FR | FC | RL | RR },
 224         /* 6.1 */
 225         { .ca_id = 0x0f, .n_ch = 8,
 226           .mask = FL | FR | LFE | FC | RL | RR | RC },
 227         /* surround71 */
 228         { .ca_id = 0x13, .n_ch = 8,
 229           .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
 230         /* others */
 231         { .ca_id = 0x03, .n_ch = 8,
 232           .mask = FL | FR | LFE | FC },
 233         { .ca_id = 0x04, .n_ch = 8,
 234           .mask = FL | FR | RC},
 235         { .ca_id = 0x05, .n_ch = 8,
 236           .mask = FL | FR | LFE | RC },
 237         { .ca_id = 0x06, .n_ch = 8,
 238           .mask = FL | FR | FC | RC },
 239         { .ca_id = 0x07, .n_ch = 8,
 240           .mask = FL | FR | LFE | FC | RC },
 241         { .ca_id = 0x0c, .n_ch = 8,
 242           .mask = FL | FR | RC | RL | RR },
 243         { .ca_id = 0x0d, .n_ch = 8,
 244           .mask = FL | FR | LFE | RL | RR | RC },
 245         { .ca_id = 0x0e, .n_ch = 8,
 246           .mask = FL | FR | FC | RL | RR | RC },
 247         { .ca_id = 0x10, .n_ch = 8,
 248           .mask = FL | FR | RL | RR | RLC | RRC },
 249         { .ca_id = 0x11, .n_ch = 8,
 250           .mask = FL | FR | LFE | RL | RR | RLC | RRC },
 251         { .ca_id = 0x12, .n_ch = 8,
 252           .mask = FL | FR | FC | RL | RR | RLC | RRC },
 253         { .ca_id = 0x14, .n_ch = 8,
 254           .mask = FL | FR | FLC | FRC },
 255         { .ca_id = 0x15, .n_ch = 8,
 256           .mask = FL | FR | LFE | FLC | FRC },
 257         { .ca_id = 0x16, .n_ch = 8,
 258           .mask = FL | FR | FC | FLC | FRC },
 259         { .ca_id = 0x17, .n_ch = 8,
 260           .mask = FL | FR | LFE | FC | FLC | FRC },
 261         { .ca_id = 0x18, .n_ch = 8,
 262           .mask = FL | FR | RC | FLC | FRC },
 263         { .ca_id = 0x19, .n_ch = 8,
 264           .mask = FL | FR | LFE | RC | FLC | FRC },
 265         { .ca_id = 0x1a, .n_ch = 8,
 266           .mask = FL | FR | RC | FC | FLC | FRC },
 267         { .ca_id = 0x1b, .n_ch = 8,
 268           .mask = FL | FR | LFE | RC | FC | FLC | FRC },
 269         { .ca_id = 0x1c, .n_ch = 8,
 270           .mask = FL | FR | RL | RR | FLC | FRC },
 271         { .ca_id = 0x1d, .n_ch = 8,
 272           .mask = FL | FR | LFE | RL | RR | FLC | FRC },
 273         { .ca_id = 0x1e, .n_ch = 8,
 274           .mask = FL | FR | FC | RL | RR | FLC | FRC },
 275         { .ca_id = 0x1f, .n_ch = 8,
 276           .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
 277 };
 278
 279 struct hdmi_codec_priv {
 280         struct hdmi_codec_pdata hcd;
 281         struct snd_soc_dai_driver *daidrv;
 282         struct hdmi_codec_daifmt daifmt[2];
 283         struct mutex current_stream_lock;
 284         struct snd_pcm_substream *current_stream;
 285         uint8_t eld[MAX_ELD_BYTES];
 286         struct snd_pcm_chmap *chmap_info;
 287         unsigned int chmap_idx;
 288 };
 289
 290 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 291         SND_SOC_DAPM_OUTPUT("TX"),
 292 };
 293
 294 enum {
 295         DAI_ID_I2S = 0,
 296         DAI_ID_SPDIF,
 297 };
 298
 299 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
 300                              struct snd_ctl_elem_info *uinfo)
 301 {
 302         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 303         uinfo->count = FIELD_SIZEOF(struct hdmi_codec_priv, eld);
 304
 305         return 0;
 306 }
 307
 308 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
 309                             struct snd_ctl_elem_value *ucontrol)
 310 {
 311         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 312         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 313
 314         memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
 315
 316         return 0;
 317 }
 318
 319 static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
 320 {
 321         int i;
 322         static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
 323                 [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
 324                 [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
 325         };
 326         unsigned long spk_mask = 0;
 327
 328         for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
 329                 if (spk_alloc & (1 << i))
 330                         spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
 331         }
 332
 333         return spk_mask;
 334 }
 335
 336 static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
 337 {
 338         u8 spk_alloc;
 339         unsigned long spk_mask;
 340
 341         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 342         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 343
 344         /* Detect if only stereo supported, else return 8 channels mappings */
 345         if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
 346                 hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
 347         else
 348                 hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 349 }
 350
 351 static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
 352                                              unsigned char channels)
 353 {
 354         int i;
 355         u8 spk_alloc;
 356         unsigned long spk_mask;
 357         const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
 358
 359         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 360         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 361
 362         for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
 363                 /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
 364                 if (!spk_alloc && cap->ca_id == 0)
 365                         return i;
 366                 if (cap->n_ch != channels)
 367                         continue;
 368                 if (!(cap->mask == (spk_mask & cap->mask)))
 369                         continue;
 370                 return i;
 371         }
 372
 373         return -EINVAL;
 374 }
 375 static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 376                               struct snd_ctl_elem_value *ucontrol)
 377 {
 378         unsigned const char *map;
 379         unsigned int i;
 380         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 381         struct hdmi_codec_priv *hcp = info->private_data;
 382
 383         map = info->chmap[hcp->chmap_idx].map;
 384
 385         for (i = 0; i < info->max_channels; i++) {
 386                 if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
 387                         ucontrol->value.integer.value[i] = 0;
 388                 else
 389                         ucontrol->value.integer.value[i] = map[i];
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
 396                                  struct snd_soc_dai *dai)
 397 {
 398         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 399         int ret = 0;
 400
 401         mutex_lock(&hcp->current_stream_lock);
 402         if (!hcp->current_stream) {
 403                 hcp->current_stream = substream;
 404         } else if (hcp->current_stream != substream) {
 405                 dev_err(dai->dev, "Only one simultaneous stream supported!\n");
 406                 ret = -EINVAL;
 407         }
 408         mutex_unlock(&hcp->current_stream_lock);
 409
 410         return ret;
 411 }
 412
 413 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 414                               struct snd_soc_dai *dai)
 415 {
 416         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 417         int ret = 0;
 418
 419         dev_dbg(dai->dev, "%s()\n", __func__);
 420
 421         ret = hdmi_codec_new_stream(substream, dai);
 422         if (ret)
 423                 return ret;
 424
 425         if (hcp->hcd.ops->audio_startup) {
 426                 ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 427                 if (ret) {
 428                         mutex_lock(&hcp->current_stream_lock);
 429                         hcp->current_stream = NULL;
 430                         mutex_unlock(&hcp->current_stream_lock);
 431                         return ret;
 432                 }
 433         }
 434
 435         if (hcp->hcd.ops->get_eld) {
 436                 ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 437                                             hcp->eld, sizeof(hcp->eld));
 438
 439                 if (!ret) {
 440                         ret = snd_pcm_hw_constraint_eld(substream->runtime,
 441                                                         hcp->eld);
 442                         if (ret) {
 443                                 mutex_lock(&hcp->current_stream_lock);
 444                                 hcp->current_stream = NULL;
 445                                 mutex_unlock(&hcp->current_stream_lock);
 446                                 return ret;
 447                         }
 448                 }
 449                 /* Select chmap supported */
 450                 hdmi_codec_eld_chmap(hcp);
 451         }
 452         return 0;
 453 }
 454
 455 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 456                                 struct snd_soc_dai *dai)
 457 {
 458         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 459
 460         dev_dbg(dai->dev, "%s()\n", __func__);
 461
 462         WARN_ON(hcp->current_stream != substream);
 463
 464         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 465         hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 466
 467         mutex_lock(&hcp->current_stream_lock);
 468         hcp->current_stream = NULL;
 469         mutex_unlock(&hcp->current_stream_lock);
 470 }
 471
 472 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 473                                 struct snd_pcm_hw_params *params,
 474                                 struct snd_soc_dai *dai)
 475 {
 476         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 477         struct hdmi_codec_params hp = {
 478                 .iec = {
 479                         .status = { 0 },
 480                         .subcode = { 0 },
 481                         .pad = 0,
 482                         .dig_subframe = { 0 },
 483                 }
 484         };
 485         int ret, idx;
 486
 487         dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 488                 params_width(params), params_rate(params),
 489                 params_channels(params));
 490
 491         if (params_width(params) > 24)
 492                 params->msbits = 24;
 493
 494         ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
 495                                                        sizeof(hp.iec.status));
 496         if (ret < 0) {
 497                 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 498                         ret);
 499                 return ret;
 500         }
 501
 502         ret = hdmi_codec_new_stream(substream, dai);
 503         if (ret)
 504                 return ret;
 505
 506         hdmi_audio_infoframe_init(&hp.cea);
 507         hp.cea.channels = params_channels(params);
 508         hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 509         hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 510         hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
 511
 512         /* Select a channel allocation that matches with ELD and pcm channels */
 513         idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels);
 514         if (idx < 0) {
 515                 dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
 516                         idx);
 517                 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 518                 return idx;
 519         }
 520         hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
 521         hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
 522
 523         hp.sample_width = params_width(params);
 524         hp.sample_rate = params_rate(params);
 525         hp.channels = params_channels(params);
 526
 527         return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
 528                                        &hcp->daifmt[dai->id], &hp);
 529 }
 530
 531 static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
 532                               unsigned int fmt)
 533 {
 534         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 535         struct hdmi_codec_daifmt cf = { 0 };
 536
 537         dev_dbg(dai->dev, "%s()\n", __func__);
 538
 539         if (dai->id == DAI_ID_SPDIF)
 540                 return 0;
 541
 542         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 543         case SND_SOC_DAIFMT_CBM_CFM:
 544                 cf.bit_clk_master = 1;
 545                 cf.frame_clk_master = 1;
 546                 break;
 547         case SND_SOC_DAIFMT_CBS_CFM:
 548                 cf.frame_clk_master = 1;
 549                 break;
 550         case SND_SOC_DAIFMT_CBM_CFS:
 551                 cf.bit_clk_master = 1;
 552                 break;
 553         case SND_SOC_DAIFMT_CBS_CFS:
 554                 break;
 555         default:
 556                 return -EINVAL;
 557         }
 558
 559         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 560         case SND_SOC_DAIFMT_NB_NF:
 561                 break;
 562         case SND_SOC_DAIFMT_NB_IF:
 563                 cf.frame_clk_inv = 1;
 564                 break;
 565         case SND_SOC_DAIFMT_IB_NF:
 566                 cf.bit_clk_inv = 1;
 567                 break;
 568         case SND_SOC_DAIFMT_IB_IF:
 569                 cf.frame_clk_inv = 1;
 570                 cf.bit_clk_inv = 1;
 571                 break;
 572         }
 573
 574         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 575         case SND_SOC_DAIFMT_I2S:
 576                 cf.fmt = HDMI_I2S;
 577                 break;
 578         case SND_SOC_DAIFMT_DSP_A:
 579                 cf.fmt = HDMI_DSP_A;
 580                 break;
 581         case SND_SOC_DAIFMT_DSP_B:
 582                 cf.fmt = HDMI_DSP_B;
 583                 break;
 584         case SND_SOC_DAIFMT_RIGHT_J:
 585                 cf.fmt = HDMI_RIGHT_J;
 586                 break;
 587         case SND_SOC_DAIFMT_LEFT_J:
 588                 cf.fmt = HDMI_LEFT_J;
 589                 break;
 590         case SND_SOC_DAIFMT_AC97:
 591                 cf.fmt = HDMI_AC97;
 592                 break;
 593         default:
 594                 dev_err(dai->dev, "Invalid DAI interface format\n");
 595                 return -EINVAL;
 596         }
 597
 598         hcp->daifmt[dai->id] = cf;
 599
 600         return 0;
 601 }
 602
 603 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 604 {
 605         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 606
 607         dev_dbg(dai->dev, "%s()\n", __func__);
 608
 609         if (hcp->hcd.ops->digital_mute)
 610                 return hcp->hcd.ops->digital_mute(dai->dev->parent,
 611                                                   hcp->hcd.data, mute);
 612
 613         return 0;
 614 }
 615
 616 static const struct snd_soc_dai_ops hdmi_dai_ops = {
 617         .startup        = hdmi_codec_startup,
 618         .shutdown       = hdmi_codec_shutdown,
 619         .hw_params      = hdmi_codec_hw_params,
 620         .set_fmt        = hdmi_codec_set_fmt,
 621         .digital_mute   = hdmi_codec_digital_mute,
 622 };
 623
 624
 625 #define HDMI_RATES      (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 626                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 627                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
 628                          SNDRV_PCM_RATE_192000)
 629
 630 #define SPDIF_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 631                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 632                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 633                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
 634
 635 /*
 636  * This list is only for formats allowed on the I2S bus. So there is
 637  * some formats listed that are not supported by HDMI interface. For
 638  * instance allowing the 32-bit formats enables 24-precision with CPU
 639  * DAIs that do not support 24-bit formats. If the extra formats cause
 640  * problems, we should add the video side driver an option to disable
 641  * them.
 642  */
 643 #define I2S_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 644                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 645                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 646                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
 647                          SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
 648
 649 static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 650                               struct snd_soc_dai *dai)
 651 {
 652         struct snd_soc_dai_driver *drv = dai->driver;
 653         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 654         struct snd_kcontrol *kctl;
 655         struct snd_kcontrol_new hdmi_eld_ctl = {
 656                 .access = SNDRV_CTL_ELEM_ACCESS_READ |
 657                           SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 658                 .iface  = SNDRV_CTL_ELEM_IFACE_PCM,
 659                 .name   = "ELD",
 660                 .info   = hdmi_eld_ctl_info,
 661                 .get    = hdmi_eld_ctl_get,
 662                 .device = rtd->pcm->device,
 663         };
 664         int ret;
 665
 666         dev_dbg(dai->dev, "%s()\n", __func__);
 667
 668         ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 669                                       NULL, drv->playback.channels_max, 0,
 670                                       &hcp->chmap_info);
 671         if (ret < 0)
 672                 return ret;
 673
 674         /* override handlers */
 675         hcp->chmap_info->private_data = hcp;
 676         hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
 677
 678         /* default chmap supported is stereo */
 679         hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 680         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 681
 682         /* add ELD ctl with the device number corresponding to the PCM stream */
 683         kctl = snd_ctl_new1(&hdmi_eld_ctl, dai->component);
 684         if (!kctl)
 685                 return -ENOMEM;
 686
 687         return snd_ctl_add(rtd->card->snd_card, kctl);
 688 }
 689
 690 static int hdmi_dai_probe(struct snd_soc_dai *dai)
 691 {
 692         struct snd_soc_dapm_context *dapm;
 693         struct snd_soc_dapm_route route = {
 694                 .sink = "TX",
 695                 .source = dai->driver->playback.stream_name,
 696         };
 697
 698         dapm = snd_soc_component_get_dapm(dai->component);
 699
 700         return snd_soc_dapm_add_routes(dapm, &route, 1);
 701 }
 702
 703 static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 704         .name = "i2s-hifi",
 705         .id = DAI_ID_I2S,
 706         .probe = hdmi_dai_probe,
 707         .playback = {
 708                 .stream_name = "I2S Playback",
 709                 .channels_min = 2,
 710                 .channels_max = 8,
 711                 .rates = HDMI_RATES,
 712                 .formats = I2S_FORMATS,
 713                 .sig_bits = 24,
 714         },
 715         .ops = &hdmi_dai_ops,
 716         .pcm_new = hdmi_codec_pcm_new,
 717 };
 718
 719 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 720         .name = "spdif-hifi",
 721         .id = DAI_ID_SPDIF,
 722         .probe = hdmi_dai_probe,
 723         .playback = {
 724                 .stream_name = "SPDIF Playback",
 725                 .channels_min = 2,
 726                 .channels_max = 2,
 727                 .rates = HDMI_RATES,
 728                 .formats = SPDIF_FORMATS,
 729         },
 730         .ops = &hdmi_dai_ops,
 731         .pcm_new = hdmi_codec_pcm_new,
 732 };
 733
 734 static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
 735                                  struct device_node *endpoint)
 736 {
 737         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 738         int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
 739
 740         if (hcp->hcd.ops->get_dai_id)
 741                 ret = hcp->hcd.ops->get_dai_id(component, endpoint);
 742
 743         return ret;
 744 }
 745
 746 static const struct snd_soc_component_driver hdmi_driver = {
 747         .dapm_widgets           = hdmi_widgets,
 748         .num_dapm_widgets       = ARRAY_SIZE(hdmi_widgets),
 749         .of_xlate_dai_id        = hdmi_of_xlate_dai_id,
 750         .idle_bias_on           = 1,
 751         .use_pmdown_time        = 1,
 752         .endianness             = 1,
 753         .non_legacy_dai_naming  = 1,
 754 };
 755
 756 static int hdmi_codec_probe(struct platform_device *pdev)
 757 {
 758         struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 759         struct device *dev = &pdev->dev;
 760         struct hdmi_codec_priv *hcp;
 761         int dai_count, i = 0;
 762         int ret;
 763
 764         dev_dbg(dev, "%s()\n", __func__);
 765
 766         if (!hcd) {
 767                 dev_err(dev, "%s: No plalform data\n", __func__);
 768                 return -EINVAL;
 769         }
 770
 771         dai_count = hcd->i2s + hcd->spdif;
 772         if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
 773             !hcd->ops->audio_shutdown) {
 774                 dev_err(dev, "%s: Invalid parameters\n", __func__);
 775                 return -EINVAL;
 776         }
 777
 778         hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
 779         if (!hcp)
 780                 return -ENOMEM;
 781
 782         hcp->hcd = *hcd;
 783         mutex_init(&hcp->current_stream_lock);
 784
 785         hcp->daidrv = devm_kcalloc(dev, dai_count, sizeof(*hcp->daidrv),
 786                                    GFP_KERNEL);
 787         if (!hcp->daidrv)
 788                 return -ENOMEM;
 789
 790         if (hcd->i2s) {
 791                 hcp->daidrv[i] = hdmi_i2s_dai;
 792                 hcp->daidrv[i].playback.channels_max =
 793                         hcd->max_i2s_channels;
 794                 i++;
 795         }
 796
 797         if (hcd->spdif) {
 798                 hcp->daidrv[i] = hdmi_spdif_dai;
 799                 hcp->daifmt[DAI_ID_SPDIF].fmt = HDMI_SPDIF;
 800         }
 801
 802         dev_set_drvdata(dev, hcp);
 803
 804         ret = devm_snd_soc_register_component(dev, &hdmi_driver, hcp->daidrv,
 805                                      dai_count);
 806         if (ret) {
 807                 dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
 808                         __func__, ret);
 809                 return ret;
 810         }
 811         return 0;
 812 }
 813
 814 static struct platform_driver hdmi_codec_driver = {
 815         .driver = {
 816                 .name = HDMI_CODEC_DRV_NAME,
 817         },
 818         .probe = hdmi_codec_probe,
 819 };
 820
 821 module_platform_driver(hdmi_codec_driver);
 822
 823 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
 824 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
 825 MODULE_LICENSE("GPL");
 826 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);