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         uint8_t eld[MAX_ELD_BYTES];
 274         struct snd_pcm_chmap *chmap_info;
 275         unsigned int chmap_idx;
 276         struct mutex lock;
 277 };
 278
 279 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 280         SND_SOC_DAPM_OUTPUT("TX"),
 281 };
 282
 283 enum {
 284         DAI_ID_I2S = 0,
 285         DAI_ID_SPDIF,
 286 };
 287
 288 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
 289                              struct snd_ctl_elem_info *uinfo)
 290 {
 291         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
 292         uinfo->count = FIELD_SIZEOF(struct hdmi_codec_priv, eld);
 293
 294         return 0;
 295 }
 296
 297 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
 298                             struct snd_ctl_elem_value *ucontrol)
 299 {
 300         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 301         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 302
 303         memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
 304
 305         return 0;
 306 }
 307
 308 static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
 309 {
 310         int i;
 311         static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
 312                 [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
 313                 [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
 314         };
 315         unsigned long spk_mask = 0;
 316
 317         for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
 318                 if (spk_alloc & (1 << i))
 319                         spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
 320         }
 321
 322         return spk_mask;
 323 }
 324
 325 static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
 326 {
 327         u8 spk_alloc;
 328         unsigned long spk_mask;
 329
 330         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 331         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 332
 333         /* Detect if only stereo supported, else return 8 channels mappings */
 334         if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
 335                 hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
 336         else
 337                 hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 338 }
 339
 340 static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
 341                                              unsigned char channels)
 342 {
 343         int i;
 344         u8 spk_alloc;
 345         unsigned long spk_mask;
 346         const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
 347
 348         spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
 349         spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
 350
 351         for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
 352                 /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
 353                 if (!spk_alloc && cap->ca_id == 0)
 354                         return i;
 355                 if (cap->n_ch != channels)
 356                         continue;
 357                 if (!(cap->mask == (spk_mask & cap->mask)))
 358                         continue;
 359                 return i;
 360         }
 361
 362         return -EINVAL;
 363 }
 364 static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
 365                               struct snd_ctl_elem_value *ucontrol)
 366 {
 367         unsigned const char *map;
 368         unsigned int i;
 369         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
 370         struct hdmi_codec_priv *hcp = info->private_data;
 371
 372         map = info->chmap[hcp->chmap_idx].map;
 373
 374         for (i = 0; i < info->max_channels; i++) {
 375                 if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
 376                         ucontrol->value.integer.value[i] = 0;
 377                 else
 378                         ucontrol->value.integer.value[i] = map[i];
 379         }
 380
 381         return 0;
 382 }
 383
 384 static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 385                               struct snd_soc_dai *dai)
 386 {
 387         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 388         int ret = 0;
 389
 390         ret = mutex_trylock(&hcp->lock);
 391         if (!ret) {
 392                 dev_err(dai->dev, "Only one simultaneous stream supported!\n");
 393                 return -EINVAL;
 394         }
 395
 396         if (hcp->hcd.ops->audio_startup) {
 397                 ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 398                 if (ret)
 399                         goto err;
 400         }
 401
 402         if (hcp->hcd.ops->get_eld) {
 403                 ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 404                                             hcp->eld, sizeof(hcp->eld));
 405
 406                 if (!ret) {
 407                         ret = snd_pcm_hw_constraint_eld(substream->runtime,
 408                                                         hcp->eld);
 409                         if (ret)
 410                                 goto err;
 411                 }
 412                 /* Select chmap supported */
 413                 hdmi_codec_eld_chmap(hcp);
 414         }
 415         return 0;
 416
 417 err:
 418         /* Release the exclusive lock on error */
 419         mutex_unlock(&hcp->lock);
 420         return ret;
 421 }
 422
 423 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 424                                 struct snd_soc_dai *dai)
 425 {
 426         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 427
 428         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 429         hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 430
 431         mutex_unlock(&hcp->lock);
 432 }
 433
 434 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
 435                                 struct snd_pcm_hw_params *params,
 436                                 struct snd_soc_dai *dai)
 437 {
 438         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 439         struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 440         struct hdmi_codec_params hp = {
 441                 .iec = {
 442                         .status = { 0 },
 443                         .subcode = { 0 },
 444                         .pad = 0,
 445                         .dig_subframe = { 0 },
 446                 }
 447         };
 448         int ret, idx;
 449
 450         dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
 451                 params_width(params), params_rate(params),
 452                 params_channels(params));
 453
 454         ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
 455                                                        sizeof(hp.iec.status));
 456         if (ret < 0) {
 457                 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
 458                         ret);
 459                 return ret;
 460         }
 461
 462         hdmi_audio_infoframe_init(&hp.cea);
 463         hp.cea.channels = params_channels(params);
 464         hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 465         hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 466         hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
 467
 468         /* Select a channel allocation that matches with ELD and pcm channels */
 469         idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels);
 470         if (idx < 0) {
 471                 dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
 472                         idx);
 473                 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 474                 return idx;
 475         }
 476         hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
 477         hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
 478
 479         hp.sample_width = params_width(params);
 480         hp.sample_rate = params_rate(params);
 481         hp.channels = params_channels(params);
 482
 483         return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
 484                                        cf, &hp);
 485 }
 486
 487 static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
 488                                   unsigned int fmt)
 489 {
 490         struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 491
 492         /* Reset daifmt */
 493         memset(cf, 0, sizeof(*cf));
 494
 495         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 496         case SND_SOC_DAIFMT_CBM_CFM:
 497                 cf->bit_clk_master = 1;
 498                 cf->frame_clk_master = 1;
 499                 break;
 500         case SND_SOC_DAIFMT_CBS_CFM:
 501                 cf->frame_clk_master = 1;
 502                 break;
 503         case SND_SOC_DAIFMT_CBM_CFS:
 504                 cf->bit_clk_master = 1;
 505                 break;
 506         case SND_SOC_DAIFMT_CBS_CFS:
 507                 break;
 508         default:
 509                 return -EINVAL;
 510         }
 511
 512         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 513         case SND_SOC_DAIFMT_NB_NF:
 514                 break;
 515         case SND_SOC_DAIFMT_NB_IF:
 516                 cf->frame_clk_inv = 1;
 517                 break;
 518         case SND_SOC_DAIFMT_IB_NF:
 519                 cf->bit_clk_inv = 1;
 520                 break;
 521         case SND_SOC_DAIFMT_IB_IF:
 522                 cf->frame_clk_inv = 1;
 523                 cf->bit_clk_inv = 1;
 524                 break;
 525         }
 526
 527         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 528         case SND_SOC_DAIFMT_I2S:
 529                 cf->fmt = HDMI_I2S;
 530                 break;
 531         case SND_SOC_DAIFMT_DSP_A:
 532                 cf->fmt = HDMI_DSP_A;
 533                 break;
 534         case SND_SOC_DAIFMT_DSP_B:
 535                 cf->fmt = HDMI_DSP_B;
 536                 break;
 537         case SND_SOC_DAIFMT_RIGHT_J:
 538                 cf->fmt = HDMI_RIGHT_J;
 539                 break;
 540         case SND_SOC_DAIFMT_LEFT_J:
 541                 cf->fmt = HDMI_LEFT_J;
 542                 break;
 543         case SND_SOC_DAIFMT_AC97:
 544                 cf->fmt = HDMI_AC97;
 545                 break;
 546         default:
 547                 dev_err(dai->dev, "Invalid DAI interface format\n");
 548                 return -EINVAL;
 549         }
 550
 551         return 0;
 552 }
 553
 554 static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 555 {
 556         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 557
 558         if (hcp->hcd.ops->digital_mute)
 559                 return hcp->hcd.ops->digital_mute(dai->dev->parent,
 560                                                   hcp->hcd.data, mute);
 561
 562         return 0;
 563 }
 564
 565 static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
 566         .startup        = hdmi_codec_startup,
 567         .shutdown       = hdmi_codec_shutdown,
 568         .hw_params      = hdmi_codec_hw_params,
 569         .set_fmt        = hdmi_codec_i2s_set_fmt,
 570         .digital_mute   = hdmi_codec_digital_mute,
 571 };
 572
 573 static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
 574         .startup        = hdmi_codec_startup,
 575         .shutdown       = hdmi_codec_shutdown,
 576         .hw_params      = hdmi_codec_hw_params,
 577         .digital_mute   = hdmi_codec_digital_mute,
 578 };
 579
 580 #define HDMI_RATES      (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 581                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 582                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
 583                          SNDRV_PCM_RATE_192000)
 584
 585 #define SPDIF_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 586                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 587                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 588                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
 589
 590 /*
 591  * This list is only for formats allowed on the I2S bus. So there is
 592  * some formats listed that are not supported by HDMI interface. For
 593  * instance allowing the 32-bit formats enables 24-precision with CPU
 594  * DAIs that do not support 24-bit formats. If the extra formats cause
 595  * problems, we should add the video side driver an option to disable
 596  * them.
 597  */
 598 #define I2S_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
 599                          SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
 600                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
 601                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
 602                          SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
 603
 604 static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 605                               struct snd_soc_dai *dai)
 606 {
 607         struct snd_soc_dai_driver *drv = dai->driver;
 608         struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
 609         struct snd_kcontrol *kctl;
 610         struct snd_kcontrol_new hdmi_eld_ctl = {
 611                 .access = SNDRV_CTL_ELEM_ACCESS_READ |
 612                           SNDRV_CTL_ELEM_ACCESS_VOLATILE,
 613                 .iface  = SNDRV_CTL_ELEM_IFACE_PCM,
 614                 .name   = "ELD",
 615                 .info   = hdmi_eld_ctl_info,
 616                 .get    = hdmi_eld_ctl_get,
 617                 .device = rtd->pcm->device,
 618         };
 619         int ret;
 620
 621         ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 622                                       NULL, drv->playback.channels_max, 0,
 623                                       &hcp->chmap_info);
 624         if (ret < 0)
 625                 return ret;
 626
 627         /* override handlers */
 628         hcp->chmap_info->private_data = hcp;
 629         hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
 630
 631         /* default chmap supported is stereo */
 632         hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
 633         hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 634
 635         /* add ELD ctl with the device number corresponding to the PCM stream */
 636         kctl = snd_ctl_new1(&hdmi_eld_ctl, dai->component);
 637         if (!kctl)
 638                 return -ENOMEM;
 639
 640         return snd_ctl_add(rtd->card->snd_card, kctl);
 641 }
 642
 643 static int hdmi_dai_probe(struct snd_soc_dai *dai)
 644 {
 645         struct snd_soc_dapm_context *dapm;
 646         struct hdmi_codec_daifmt *daifmt;
 647         struct snd_soc_dapm_route route = {
 648                 .sink = "TX",
 649                 .source = dai->driver->playback.stream_name,
 650         };
 651         int ret;
 652
 653         dapm = snd_soc_component_get_dapm(dai->component);
 654         ret = snd_soc_dapm_add_routes(dapm, &route, 1);
 655         if (ret)
 656                 return ret;
 657
 658         daifmt = kzalloc(sizeof(*daifmt), GFP_KERNEL);
 659         if (!daifmt)
 660                 return -ENOMEM;
 661
 662         dai->playback_dma_data = daifmt;
 663         return 0;
 664 }
 665
 666 static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai)
 667 {
 668         struct hdmi_codec_daifmt *cf = dai->playback_dma_data;
 669         int ret;
 670
 671         ret = hdmi_dai_probe(dai);
 672         if (ret)
 673                 return ret;
 674
 675         cf = dai->playback_dma_data;
 676         cf->fmt = HDMI_SPDIF;
 677
 678         return 0;
 679 }
 680
 681 static int hdmi_codec_dai_remove(struct snd_soc_dai *dai)
 682 {
 683         kfree(dai->playback_dma_data);
 684         return 0;
 685 }
 686
 687 static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 688         .name = "i2s-hifi",
 689         .id = DAI_ID_I2S,
 690         .probe = hdmi_dai_probe,
 691         .remove = hdmi_codec_dai_remove,
 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_codec_i2s_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_spdif_probe,
 708         .remove = hdmi_codec_dai_remove,
 709         .playback = {
 710                 .stream_name = "SPDIF Playback",
 711                 .channels_min = 2,
 712                 .channels_max = 2,
 713                 .rates = HDMI_RATES,
 714                 .formats = SPDIF_FORMATS,
 715         },
 716         .ops = &hdmi_codec_spdif_dai_ops,
 717         .pcm_new = hdmi_codec_pcm_new,
 718 };
 719
 720 static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
 721                                  struct device_node *endpoint)
 722 {
 723         struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
 724         int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
 725
 726         if (hcp->hcd.ops->get_dai_id)
 727                 ret = hcp->hcd.ops->get_dai_id(component, endpoint);
 728
 729         return ret;
 730 }
 731
 732 static const struct snd_soc_component_driver hdmi_driver = {
 733         .dapm_widgets           = hdmi_widgets,
 734         .num_dapm_widgets       = ARRAY_SIZE(hdmi_widgets),
 735         .of_xlate_dai_id        = hdmi_of_xlate_dai_id,
 736         .idle_bias_on           = 1,
 737         .use_pmdown_time        = 1,
 738         .endianness             = 1,
 739         .non_legacy_dai_naming  = 1,
 740 };
 741
 742 static int hdmi_codec_probe(struct platform_device *pdev)
 743 {
 744         struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 745         struct snd_soc_dai_driver *daidrv;
 746         struct device *dev = &pdev->dev;
 747         struct hdmi_codec_priv *hcp;
 748         int dai_count, i = 0;
 749         int ret;
 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->lock);
 769
 770         daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
 771         if (!daidrv)
 772                 return -ENOMEM;
 773
 774         if (hcd->i2s) {
 775                 daidrv[i] = hdmi_i2s_dai;
 776                 daidrv[i].playback.channels_max = hcd->max_i2s_channels;
 777                 i++;
 778         }
 779
 780         if (hcd->spdif)
 781                 daidrv[i] = hdmi_spdif_dai;
 782
 783         dev_set_drvdata(dev, hcp);
 784
 785         ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
 786                                               dai_count);
 787         if (ret) {
 788                 dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
 789                         __func__, ret);
 790                 return ret;
 791         }
 792         return 0;
 793 }
 794
 795 static struct platform_driver hdmi_codec_driver = {
 796         .driver = {
 797                 .name = HDMI_CODEC_DRV_NAME,
 798         },
 799         .probe = hdmi_codec_probe,
 800 };
 801
 802 module_platform_driver(hdmi_codec_driver);
 803
 804 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
 805 MODULE_DESCRIPTION("HDMI Audio Codec Driver");
 806 MODULE_LICENSE("GPL");
 807 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);