1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ALSA SoC codec for HDMI encoder drivers 4 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/ 5 * Author: Jyri Sarha <jsarha@ti.com> 6 */ 7 #include <linux/module.h> 8 #include <linux/string.h> 9 #include <sound/core.h> 10 #include <sound/jack.h> 11 #include <sound/pcm.h> 12 #include <sound/pcm_params.h> 13 #include <sound/soc.h> 14 #include <sound/tlv.h> 15 #include <sound/pcm_drm_eld.h> 16 #include <sound/hdmi-codec.h> 17 #include <sound/pcm_iec958.h> 18 19 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */ 20 21 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1 22 23 struct hdmi_codec_channel_map_table { 24 unsigned char map; /* ALSA API channel map position */ 25 }; 26 27 /* 28 * CEA speaker placement for HDMI 1.4: 29 * 30 * FL FLC FC FRC FR FRW 31 * 32 * LFE 33 * 34 * RL RLC RC RRC RR 35 * 36 * Speaker placement has to be extended to support HDMI 2.0 37 */ 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 bool busy; 278 struct snd_soc_jack *jack; 279 unsigned int jack_status; 280 u8 iec_status[AES_IEC958_STATUS_SIZE]; 281 }; 282 283 static const struct snd_soc_dapm_widget hdmi_widgets[] = { 284 SND_SOC_DAPM_OUTPUT("TX"), 285 SND_SOC_DAPM_OUTPUT("RX"), 286 }; 287 288 enum { 289 DAI_ID_I2S = 0, 290 DAI_ID_SPDIF, 291 }; 292 293 static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol, 294 struct snd_ctl_elem_info *uinfo) 295 { 296 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; 297 uinfo->count = sizeof_field(struct hdmi_codec_priv, eld); 298 299 return 0; 300 } 301 302 static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol, 303 struct snd_ctl_elem_value *ucontrol) 304 { 305 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 306 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 307 308 memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld)); 309 310 return 0; 311 } 312 313 static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc) 314 { 315 int i; 316 static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = { 317 [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR, 318 [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC, 319 }; 320 unsigned long spk_mask = 0; 321 322 for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) { 323 if (spk_alloc & (1 << i)) 324 spk_mask |= hdmi_codec_eld_spk_alloc_bits[i]; 325 } 326 327 return spk_mask; 328 } 329 330 static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp) 331 { 332 u8 spk_alloc; 333 unsigned long spk_mask; 334 335 spk_alloc = drm_eld_get_spk_alloc(hcp->eld); 336 spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc); 337 338 /* Detect if only stereo supported, else return 8 channels mappings */ 339 if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2) 340 hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps; 341 else 342 hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps; 343 } 344 345 static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp, 346 unsigned char channels) 347 { 348 int i; 349 u8 spk_alloc; 350 unsigned long spk_mask; 351 const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc; 352 353 spk_alloc = drm_eld_get_spk_alloc(hcp->eld); 354 spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc); 355 356 for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) { 357 /* If spk_alloc == 0, HDMI is unplugged return stereo config*/ 358 if (!spk_alloc && cap->ca_id == 0) 359 return i; 360 if (cap->n_ch != channels) 361 continue; 362 if (!(cap->mask == (spk_mask & cap->mask))) 363 continue; 364 return i; 365 } 366 367 return -EINVAL; 368 } 369 static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol, 370 struct snd_ctl_elem_value *ucontrol) 371 { 372 unsigned const char *map; 373 unsigned int i; 374 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 375 struct hdmi_codec_priv *hcp = info->private_data; 376 377 map = info->chmap[hcp->chmap_idx].map; 378 379 for (i = 0; i < info->max_channels; i++) { 380 if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN) 381 ucontrol->value.integer.value[i] = 0; 382 else 383 ucontrol->value.integer.value[i] = map[i]; 384 } 385 386 return 0; 387 } 388 389 static int hdmi_codec_iec958_info(struct snd_kcontrol *kcontrol, 390 struct snd_ctl_elem_info *uinfo) 391 { 392 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; 393 uinfo->count = 1; 394 return 0; 395 } 396 397 static int hdmi_codec_iec958_default_get(struct snd_kcontrol *kcontrol, 398 struct snd_ctl_elem_value *ucontrol) 399 { 400 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 401 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 402 403 memcpy(ucontrol->value.iec958.status, hcp->iec_status, 404 sizeof(hcp->iec_status)); 405 406 return 0; 407 } 408 409 static int hdmi_codec_iec958_default_put(struct snd_kcontrol *kcontrol, 410 struct snd_ctl_elem_value *ucontrol) 411 { 412 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 413 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 414 415 memcpy(hcp->iec_status, ucontrol->value.iec958.status, 416 sizeof(hcp->iec_status)); 417 418 return 0; 419 } 420 421 static int hdmi_codec_iec958_mask_get(struct snd_kcontrol *kcontrol, 422 struct snd_ctl_elem_value *ucontrol) 423 { 424 memset(ucontrol->value.iec958.status, 0xff, 425 sizeof_field(struct hdmi_codec_priv, iec_status)); 426 427 return 0; 428 } 429 430 static int hdmi_codec_startup(struct snd_pcm_substream *substream, 431 struct snd_soc_dai *dai) 432 { 433 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 434 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 435 int ret = 0; 436 437 mutex_lock(&hcp->lock); 438 if (hcp->busy) { 439 dev_err(dai->dev, "Only one simultaneous stream supported!\n"); 440 mutex_unlock(&hcp->lock); 441 return -EINVAL; 442 } 443 444 if (hcp->hcd.ops->audio_startup) { 445 ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data); 446 if (ret) 447 goto err; 448 } 449 450 if (tx && hcp->hcd.ops->get_eld) { 451 ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data, 452 hcp->eld, sizeof(hcp->eld)); 453 if (ret) 454 goto err; 455 456 ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld); 457 if (ret) 458 goto err; 459 460 /* Select chmap supported */ 461 hdmi_codec_eld_chmap(hcp); 462 } 463 464 hcp->busy = true; 465 466 err: 467 mutex_unlock(&hcp->lock); 468 return ret; 469 } 470 471 static void hdmi_codec_shutdown(struct snd_pcm_substream *substream, 472 struct snd_soc_dai *dai) 473 { 474 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 475 476 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN; 477 hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data); 478 479 mutex_lock(&hcp->lock); 480 hcp->busy = false; 481 mutex_unlock(&hcp->lock); 482 } 483 484 static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai, 485 unsigned int sample_width, 486 unsigned int sample_rate, 487 unsigned int channels, 488 struct hdmi_codec_params *hp) 489 { 490 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 491 int idx; 492 493 /* Select a channel allocation that matches with ELD and pcm channels */ 494 idx = hdmi_codec_get_ch_alloc_table_idx(hcp, channels); 495 if (idx < 0) { 496 dev_err(dai->dev, "Not able to map channels to speakers (%d)\n", 497 idx); 498 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN; 499 return idx; 500 } 501 502 memset(hp, 0, sizeof(*hp)); 503 504 hdmi_audio_infoframe_init(&hp->cea); 505 hp->cea.channels = channels; 506 hp->cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM; 507 hp->cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM; 508 hp->cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM; 509 hp->cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id; 510 511 hp->sample_width = sample_width; 512 hp->sample_rate = sample_rate; 513 hp->channels = channels; 514 515 hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id; 516 517 return 0; 518 } 519 520 static int hdmi_codec_hw_params(struct snd_pcm_substream *substream, 521 struct snd_pcm_hw_params *params, 522 struct snd_soc_dai *dai) 523 { 524 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 525 struct hdmi_codec_daifmt *cf = dai->playback_dma_data; 526 struct hdmi_codec_params hp = { 527 .iec = { 528 .status = { 0 }, 529 .subcode = { 0 }, 530 .pad = 0, 531 .dig_subframe = { 0 }, 532 } 533 }; 534 int ret; 535 536 if (!hcp->hcd.ops->hw_params) 537 return 0; 538 539 dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__, 540 params_width(params), params_rate(params), 541 params_channels(params)); 542 543 ret = hdmi_codec_fill_codec_params(dai, 544 params_width(params), 545 params_rate(params), 546 params_channels(params), 547 &hp); 548 if (ret < 0) 549 return ret; 550 551 memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status)); 552 ret = snd_pcm_fill_iec958_consumer_hw_params(params, hp.iec.status, 553 sizeof(hp.iec.status)); 554 if (ret < 0) { 555 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n", 556 ret); 557 return ret; 558 } 559 560 cf->bit_fmt = params_format(params); 561 return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data, 562 cf, &hp); 563 } 564 565 static int hdmi_codec_prepare(struct snd_pcm_substream *substream, 566 struct snd_soc_dai *dai) 567 { 568 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 569 struct hdmi_codec_daifmt *cf = dai->playback_dma_data; 570 struct snd_pcm_runtime *runtime = substream->runtime; 571 unsigned int channels = runtime->channels; 572 unsigned int width = snd_pcm_format_width(runtime->format); 573 unsigned int rate = runtime->rate; 574 struct hdmi_codec_params hp; 575 int ret; 576 577 if (!hcp->hcd.ops->prepare) 578 return 0; 579 580 dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__, 581 width, rate, channels); 582 583 ret = hdmi_codec_fill_codec_params(dai, width, rate, channels, &hp); 584 if (ret < 0) 585 return ret; 586 587 memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status)); 588 ret = snd_pcm_fill_iec958_consumer(runtime, hp.iec.status, 589 sizeof(hp.iec.status)); 590 if (ret < 0) { 591 dev_err(dai->dev, "Creating IEC958 channel status failed %d\n", 592 ret); 593 return ret; 594 } 595 596 cf->bit_fmt = runtime->format; 597 return hcp->hcd.ops->prepare(dai->dev->parent, hcp->hcd.data, 598 cf, &hp); 599 } 600 601 static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai, 602 unsigned int fmt) 603 { 604 struct hdmi_codec_daifmt *cf = dai->playback_dma_data; 605 606 /* Reset daifmt */ 607 memset(cf, 0, sizeof(*cf)); 608 609 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 610 case SND_SOC_DAIFMT_CBM_CFM: 611 cf->bit_clk_master = 1; 612 cf->frame_clk_master = 1; 613 break; 614 case SND_SOC_DAIFMT_CBS_CFM: 615 cf->frame_clk_master = 1; 616 break; 617 case SND_SOC_DAIFMT_CBM_CFS: 618 cf->bit_clk_master = 1; 619 break; 620 case SND_SOC_DAIFMT_CBS_CFS: 621 break; 622 default: 623 return -EINVAL; 624 } 625 626 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 627 case SND_SOC_DAIFMT_NB_NF: 628 break; 629 case SND_SOC_DAIFMT_NB_IF: 630 cf->frame_clk_inv = 1; 631 break; 632 case SND_SOC_DAIFMT_IB_NF: 633 cf->bit_clk_inv = 1; 634 break; 635 case SND_SOC_DAIFMT_IB_IF: 636 cf->frame_clk_inv = 1; 637 cf->bit_clk_inv = 1; 638 break; 639 } 640 641 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 642 case SND_SOC_DAIFMT_I2S: 643 cf->fmt = HDMI_I2S; 644 break; 645 case SND_SOC_DAIFMT_DSP_A: 646 cf->fmt = HDMI_DSP_A; 647 break; 648 case SND_SOC_DAIFMT_DSP_B: 649 cf->fmt = HDMI_DSP_B; 650 break; 651 case SND_SOC_DAIFMT_RIGHT_J: 652 cf->fmt = HDMI_RIGHT_J; 653 break; 654 case SND_SOC_DAIFMT_LEFT_J: 655 cf->fmt = HDMI_LEFT_J; 656 break; 657 case SND_SOC_DAIFMT_AC97: 658 cf->fmt = HDMI_AC97; 659 break; 660 default: 661 dev_err(dai->dev, "Invalid DAI interface format\n"); 662 return -EINVAL; 663 } 664 665 return 0; 666 } 667 668 static int hdmi_codec_mute(struct snd_soc_dai *dai, int mute, int direction) 669 { 670 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 671 672 /* 673 * ignore if direction was CAPTURE 674 * and it had .no_capture_mute flag 675 * see 676 * snd_soc_dai_digital_mute() 677 */ 678 if (hcp->hcd.ops->mute_stream && 679 (direction == SNDRV_PCM_STREAM_PLAYBACK || 680 !hcp->hcd.ops->no_capture_mute)) 681 return hcp->hcd.ops->mute_stream(dai->dev->parent, 682 hcp->hcd.data, 683 mute, direction); 684 685 return -ENOTSUPP; 686 } 687 688 /* 689 * This driver can select all SND_SOC_DAIFMT_CBx_CFx, 690 * but need to be selected from Sound Card, not be auto selected. 691 * Because it might be used from other driver. 692 * For example, 693 * ${LINUX}/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c 694 */ 695 static u64 hdmi_codec_formats = 696 SND_SOC_POSSIBLE_DAIFMT_NB_NF | 697 SND_SOC_POSSIBLE_DAIFMT_NB_IF | 698 SND_SOC_POSSIBLE_DAIFMT_IB_NF | 699 SND_SOC_POSSIBLE_DAIFMT_IB_IF | 700 SND_SOC_POSSIBLE_DAIFMT_I2S | 701 SND_SOC_POSSIBLE_DAIFMT_DSP_A | 702 SND_SOC_POSSIBLE_DAIFMT_DSP_B | 703 SND_SOC_POSSIBLE_DAIFMT_RIGHT_J | 704 SND_SOC_POSSIBLE_DAIFMT_LEFT_J | 705 SND_SOC_POSSIBLE_DAIFMT_AC97; 706 707 static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = { 708 .startup = hdmi_codec_startup, 709 .shutdown = hdmi_codec_shutdown, 710 .hw_params = hdmi_codec_hw_params, 711 .prepare = hdmi_codec_prepare, 712 .set_fmt = hdmi_codec_i2s_set_fmt, 713 .mute_stream = hdmi_codec_mute, 714 .auto_selectable_formats = &hdmi_codec_formats, 715 .num_auto_selectable_formats = 1, 716 }; 717 718 static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = { 719 .startup = hdmi_codec_startup, 720 .shutdown = hdmi_codec_shutdown, 721 .hw_params = hdmi_codec_hw_params, 722 .mute_stream = hdmi_codec_mute, 723 }; 724 725 #define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 726 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ 727 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\ 728 SNDRV_PCM_RATE_192000) 729 730 #define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\ 731 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\ 732 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\ 733 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE) 734 735 /* 736 * This list is only for formats allowed on the I2S bus. So there is 737 * some formats listed that are not supported by HDMI interface. For 738 * instance allowing the 32-bit formats enables 24-precision with CPU 739 * DAIs that do not support 24-bit formats. If the extra formats cause 740 * problems, we should add the video side driver an option to disable 741 * them. 742 */ 743 #define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\ 744 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\ 745 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\ 746 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\ 747 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |\ 748 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) 749 750 static struct snd_kcontrol_new hdmi_codec_controls[] = { 751 { 752 .access = SNDRV_CTL_ELEM_ACCESS_READ, 753 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 754 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK), 755 .info = hdmi_codec_iec958_info, 756 .get = hdmi_codec_iec958_mask_get, 757 }, 758 { 759 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 760 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), 761 .info = hdmi_codec_iec958_info, 762 .get = hdmi_codec_iec958_default_get, 763 .put = hdmi_codec_iec958_default_put, 764 }, 765 { 766 .access = (SNDRV_CTL_ELEM_ACCESS_READ | 767 SNDRV_CTL_ELEM_ACCESS_VOLATILE), 768 .iface = SNDRV_CTL_ELEM_IFACE_PCM, 769 .name = "ELD", 770 .info = hdmi_eld_ctl_info, 771 .get = hdmi_eld_ctl_get, 772 }, 773 }; 774 775 static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd, 776 struct snd_soc_dai *dai) 777 { 778 struct snd_soc_dai_driver *drv = dai->driver; 779 struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai); 780 unsigned int i; 781 int ret; 782 783 ret = snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK, 784 NULL, drv->playback.channels_max, 0, 785 &hcp->chmap_info); 786 if (ret < 0) 787 return ret; 788 789 /* override handlers */ 790 hcp->chmap_info->private_data = hcp; 791 hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get; 792 793 /* default chmap supported is stereo */ 794 hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps; 795 hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN; 796 797 for (i = 0; i < ARRAY_SIZE(hdmi_codec_controls); i++) { 798 struct snd_kcontrol *kctl; 799 800 /* add ELD ctl with the device number corresponding to the PCM stream */ 801 kctl = snd_ctl_new1(&hdmi_codec_controls[i], dai->component); 802 if (!kctl) 803 return -ENOMEM; 804 805 kctl->id.device = rtd->pcm->device; 806 ret = snd_ctl_add(rtd->card->snd_card, kctl); 807 if (ret < 0) 808 return ret; 809 } 810 811 return 0; 812 } 813 814 static int hdmi_dai_probe(struct snd_soc_dai *dai) 815 { 816 struct snd_soc_dapm_context *dapm; 817 struct hdmi_codec_daifmt *daifmt; 818 struct snd_soc_dapm_route route[] = { 819 { 820 .sink = "TX", 821 .source = dai->driver->playback.stream_name, 822 }, 823 { 824 .sink = dai->driver->capture.stream_name, 825 .source = "RX", 826 }, 827 }; 828 int ret; 829 830 dapm = snd_soc_component_get_dapm(dai->component); 831 ret = snd_soc_dapm_add_routes(dapm, route, 2); 832 if (ret) 833 return ret; 834 835 daifmt = kzalloc(sizeof(*daifmt), GFP_KERNEL); 836 if (!daifmt) 837 return -ENOMEM; 838 839 dai->playback_dma_data = daifmt; 840 return 0; 841 } 842 843 static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp, 844 unsigned int jack_status) 845 { 846 if (hcp->jack && jack_status != hcp->jack_status) { 847 snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT); 848 hcp->jack_status = jack_status; 849 } 850 } 851 852 static void plugged_cb(struct device *dev, bool plugged) 853 { 854 struct hdmi_codec_priv *hcp = dev_get_drvdata(dev); 855 856 if (plugged) { 857 if (hcp->hcd.ops->get_eld) { 858 hcp->hcd.ops->get_eld(dev->parent, hcp->hcd.data, 859 hcp->eld, sizeof(hcp->eld)); 860 } 861 hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT); 862 } else { 863 hdmi_codec_jack_report(hcp, 0); 864 memset(hcp->eld, 0, sizeof(hcp->eld)); 865 } 866 } 867 868 static int hdmi_codec_set_jack(struct snd_soc_component *component, 869 struct snd_soc_jack *jack, 870 void *data) 871 { 872 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 873 int ret = -ENOTSUPP; 874 875 if (hcp->hcd.ops->hook_plugged_cb) { 876 hcp->jack = jack; 877 ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent, 878 hcp->hcd.data, 879 plugged_cb, 880 component->dev); 881 if (ret) 882 hcp->jack = NULL; 883 } 884 return ret; 885 } 886 887 static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai) 888 { 889 struct hdmi_codec_daifmt *cf; 890 int ret; 891 892 ret = hdmi_dai_probe(dai); 893 if (ret) 894 return ret; 895 896 cf = dai->playback_dma_data; 897 cf->fmt = HDMI_SPDIF; 898 899 return 0; 900 } 901 902 static int hdmi_codec_dai_remove(struct snd_soc_dai *dai) 903 { 904 kfree(dai->playback_dma_data); 905 return 0; 906 } 907 908 static const struct snd_soc_dai_driver hdmi_i2s_dai = { 909 .name = "i2s-hifi", 910 .id = DAI_ID_I2S, 911 .probe = hdmi_dai_probe, 912 .remove = hdmi_codec_dai_remove, 913 .playback = { 914 .stream_name = "I2S Playback", 915 .channels_min = 2, 916 .channels_max = 8, 917 .rates = HDMI_RATES, 918 .formats = I2S_FORMATS, 919 .sig_bits = 24, 920 }, 921 .capture = { 922 .stream_name = "Capture", 923 .channels_min = 2, 924 .channels_max = 8, 925 .rates = HDMI_RATES, 926 .formats = I2S_FORMATS, 927 .sig_bits = 24, 928 }, 929 .ops = &hdmi_codec_i2s_dai_ops, 930 .pcm_new = hdmi_codec_pcm_new, 931 }; 932 933 static const struct snd_soc_dai_driver hdmi_spdif_dai = { 934 .name = "spdif-hifi", 935 .id = DAI_ID_SPDIF, 936 .probe = hdmi_dai_spdif_probe, 937 .remove = hdmi_codec_dai_remove, 938 .playback = { 939 .stream_name = "SPDIF Playback", 940 .channels_min = 2, 941 .channels_max = 2, 942 .rates = HDMI_RATES, 943 .formats = SPDIF_FORMATS, 944 }, 945 .capture = { 946 .stream_name = "Capture", 947 .channels_min = 2, 948 .channels_max = 2, 949 .rates = HDMI_RATES, 950 .formats = SPDIF_FORMATS, 951 }, 952 .ops = &hdmi_codec_spdif_dai_ops, 953 .pcm_new = hdmi_codec_pcm_new, 954 }; 955 956 static int hdmi_of_xlate_dai_id(struct snd_soc_component *component, 957 struct device_node *endpoint) 958 { 959 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 960 int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */ 961 962 if (hcp->hcd.ops->get_dai_id) 963 ret = hcp->hcd.ops->get_dai_id(component, endpoint); 964 965 return ret; 966 } 967 968 static void hdmi_remove(struct snd_soc_component *component) 969 { 970 struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component); 971 972 if (hcp->hcd.ops->hook_plugged_cb) 973 hcp->hcd.ops->hook_plugged_cb(component->dev->parent, 974 hcp->hcd.data, NULL, NULL); 975 } 976 977 static const struct snd_soc_component_driver hdmi_driver = { 978 .remove = hdmi_remove, 979 .dapm_widgets = hdmi_widgets, 980 .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets), 981 .of_xlate_dai_id = hdmi_of_xlate_dai_id, 982 .idle_bias_on = 1, 983 .use_pmdown_time = 1, 984 .endianness = 1, 985 .non_legacy_dai_naming = 1, 986 .set_jack = hdmi_codec_set_jack, 987 }; 988 989 static int hdmi_codec_probe(struct platform_device *pdev) 990 { 991 struct hdmi_codec_pdata *hcd = pdev->dev.platform_data; 992 struct snd_soc_dai_driver *daidrv; 993 struct device *dev = &pdev->dev; 994 struct hdmi_codec_priv *hcp; 995 int dai_count, i = 0; 996 int ret; 997 998 if (!hcd) { 999 dev_err(dev, "%s: No platform data\n", __func__); 1000 return -EINVAL; 1001 } 1002 1003 dai_count = hcd->i2s + hcd->spdif; 1004 if (dai_count < 1 || !hcd->ops || 1005 (!hcd->ops->hw_params && !hcd->ops->prepare) || 1006 !hcd->ops->audio_shutdown) { 1007 dev_err(dev, "%s: Invalid parameters\n", __func__); 1008 return -EINVAL; 1009 } 1010 1011 hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL); 1012 if (!hcp) 1013 return -ENOMEM; 1014 1015 hcp->hcd = *hcd; 1016 mutex_init(&hcp->lock); 1017 1018 ret = snd_pcm_create_iec958_consumer_default(hcp->iec_status, 1019 sizeof(hcp->iec_status)); 1020 if (ret < 0) 1021 return ret; 1022 1023 daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL); 1024 if (!daidrv) 1025 return -ENOMEM; 1026 1027 if (hcd->i2s) { 1028 daidrv[i] = hdmi_i2s_dai; 1029 daidrv[i].playback.channels_max = hcd->max_i2s_channels; 1030 i++; 1031 } 1032 1033 if (hcd->spdif) 1034 daidrv[i] = hdmi_spdif_dai; 1035 1036 dev_set_drvdata(dev, hcp); 1037 1038 ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv, 1039 dai_count); 1040 if (ret) { 1041 dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n", 1042 __func__, ret); 1043 return ret; 1044 } 1045 return 0; 1046 } 1047 1048 static struct platform_driver hdmi_codec_driver = { 1049 .driver = { 1050 .name = HDMI_CODEC_DRV_NAME, 1051 }, 1052 .probe = hdmi_codec_probe, 1053 }; 1054 1055 module_platform_driver(hdmi_codec_driver); 1056 1057 MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); 1058 MODULE_DESCRIPTION("HDMI Audio Codec Driver"); 1059 MODULE_LICENSE("GPL"); 1060 MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME); 1061