Documentation/devicetree/bindings/sound/renesas,rsnd.txt

   1 Renesas R-Car sound
   2
   3 =============================================
   4 * Modules
   5 =============================================
   6
   7 Renesas R-Car and RZ/G sound is constructed from below modules
   8 (for Gen2 or later)
   9
  10  SCU            : Sampling Rate Converter Unit
  11   - SRC         : Sampling Rate Converter
  12   - CMD
  13    - CTU        : Channel Transfer Unit
  14    - MIX        : Mixer
  15    - DVC        : Digital Volume and Mute Function
  16  SSIU           : Serial Sound Interface Unit
  17  SSI            : Serial Sound Interface
  18
  19 See detail of each module's channels, connection, limitation on datasheet
  20
  21 =============================================
  22 * Multi channel
  23 =============================================
  24
  25 Multi channel is supported by Multi-SSI, or TDM-SSI.
  26
  27  Multi-SSI      : 6ch case, you can use stereo x 3 SSI
  28  TDM-SSI        : 6ch case, you can use TDM
  29
  30 =============================================
  31 * Enable/Disable each modules
  32 =============================================
  33
  34 See datasheet to check SRC/CTU/MIX/DVC connect-limitation.
  35 DT controls enabling/disabling module.
  36 ${LINUX}/arch/arm/boot/dts/r8a7790-lager.dts can be good example.
  37 This is example of
  38
  39 Playback: [MEM] -> [SRC2] -> [DVC0] -> [SSIU0/SSI0] -> [codec]
  40 Capture:  [MEM] <- [DVC1] <- [SRC3] <- [SSIU1/SSI1] <- [codec]
  41
  42 see "Example: simple sound card"
  43
  44 You can use below.
  45 ${LINUX}/arch/arm/boot/dts/r8a7790.dts can be good example.
  46
  47         &src0   &ctu00  &mix0   &dvc0   &ssi0
  48         &src1   &ctu01  &mix1   &dvc1   &ssi1
  49         &src2   &ctu02                  &ssi2
  50         &src3   &ctu03                  &ssi3
  51         &src4                           &ssi4
  52         &src5   &ctu10                  &ssi5
  53         &src6   &ctu11                  &ssi6
  54         &src7   &ctu12                  &ssi7
  55         &src8   &ctu13                  &ssi8
  56         &src9                           &ssi9
  57
  58 =============================================
  59 * SRC (Sampling Rate Converter)
  60 =============================================
  61
  62  [xx]Hz        [yy]Hz
  63  ------> [SRC] ------>
  64
  65 SRC can convert [xx]Hz to [yy]Hz. Then, it has below 2 modes
  66
  67  Asynchronous mode:     input data / output data are based on different clocks.
  68                         you can use this mode on Playback / Capture
  69  Synchronous mode:      input data / output data are based on same clocks.
  70                         This mode will be used if system doesn't have its input clock,
  71                         for example digital TV case.
  72                         you can use this mode on Playback
  73
  74 ------------------
  75 **     Asynchronous mode
  76 ------------------
  77
  78 You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
  79 see "Example: simple sound card for Asynchronous mode"
  80
  81 ------------------
  82 **     Synchronous mode
  83 ------------------
  84
  85         > amixer set "SRC Out Rate" on
  86         > aplay xxxx.wav
  87         > amixer set "SRC Out Rate" 48000
  88         > amixer set "SRC Out Rate" 44100
  89
  90 =============================================
  91 * CTU (Channel Transfer Unit)
  92 =============================================
  93
  94  [xx]ch        [yy]ch
  95  ------> [CTU] -------->
  96
  97 CTU can convert [xx]ch to [yy]ch, or exchange outputed channel.
  98 CTU conversion needs matrix settings.
  99 For more detail information, see below
 100
 101         Renesas R-Car datasheet
 102          - Sampling Rate Converter Unit (SCU)
 103           - SCU Operation
 104            - CMD Block
 105             - Functional Blocks in CMD
 106
 107         Renesas R-Car datasheet
 108          - Sampling Rate Converter Unit (SCU)
 109           - Register Description
 110            - CTUn Scale Value exx Register (CTUn_SVxxR)
 111
 112         ${LINUX}/sound/soc/sh/rcar/ctu.c
 113          - comment of header
 114
 115 You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
 116 see "Example: simple sound card for channel convert"
 117
 118 Ex) Exchange output channel
 119  Input -> Output
 120   1ch  ->  0ch
 121   0ch  ->  1ch
 122
 123   example of using matrix
 124         output 0ch = (input 0ch x 0) + (input 1ch x 1)
 125         output 1ch = (input 0ch x 1) + (input 1ch x 0)
 126
 127         amixer set "CTU Reset" on
 128         amixer set "CTU Pass" 9,10
 129         amixer set "CTU SV0" 0,4194304
 130         amixer set "CTU SV1" 4194304,0
 131
 132  example of changing connection
 133         amixer set "CTU Reset" on
 134         amixer set "CTU Pass" 2,1
 135
 136 =============================================
 137 * MIX (Mixer)
 138 =============================================
 139
 140 MIX merges 2 sounds path. You can see 2 sound interface on system,
 141 and these sounds will be merged by MIX.
 142
 143         aplay -D plughw:0,0 xxxx.wav &
 144         aplay -D plughw:0,1 yyyy.wav
 145
 146 You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
 147 Ex)
 148         [MEM] -> [SRC1] -> [CTU02] -+-> [MIX0] -> [DVC0] -> [SSI0]
 149                                     |
 150         [MEM] -> [SRC2] -> [CTU03] -+
 151
 152 see "Example: simple sound card for MIXer"
 153
 154 =============================================
 155 * DVC (Digital Volume and Mute Function)
 156 =============================================
 157
 158 DVC controls Playback/Capture volume.
 159
 160 Playback Volume
 161         amixer set "DVC Out" 100%
 162
 163 Capture Volume
 164         amixer set "DVC In" 100%
 165
 166 Playback Mute
 167         amixer set "DVC Out Mute" on
 168
 169 Capture Mute
 170         amixer set "DVC In Mute" on
 171
 172 Volume Ramp
 173         amixer set "DVC Out Ramp Up Rate"   "0.125 dB/64 steps"
 174         amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
 175         amixer set "DVC Out Ramp" on
 176         aplay xxx.wav &
 177         amixer set "DVC Out"  80%  // Volume Down
 178         amixer set "DVC Out" 100%  // Volume Up
 179
 180 =============================================
 181 * SSIU (Serial Sound Interface Unit)
 182 =============================================
 183
 184 SSIU can avoid some under/over run error, because it has some buffer.
 185 But you can't use it if SSI was PIO mode.
 186 In DMA mode, you can select not to use SSIU by using "no-busif" via SSI.
 187
 188 SSIU handles BUSIF which will be used for TDM Split mode.
 189 This driver is assuming that audio-graph card will be used.
 190
 191 TDM Split mode merges 4 sounds. You can see 4 sound interface on system,
 192 and these sounds will be merged SSIU/SSI.
 193
 194         aplay -D plughw:0,0 xxxx.wav &
 195         aplay -D plughw:0,1 xxxx.wav &
 196         aplay -D plughw:0,2 xxxx.wav &
 197         aplay -D plughw:0,3 xxxx.wav
 198
 199                   2ch                     8ch
 200         [MEM] -> [SSIU 30] -+-> [SSIU 3] --> [Codec]
 201                   2ch       |
 202         [MEM] -> [SSIU 31] -+
 203                   2ch       |
 204         [MEM] -> [SSIU 32] -+
 205                   2ch       |
 206         [MEM] -> [SSIU 33] -+
 207
 208 see "Example: simple sound card for TDM Split"
 209
 210 =============================================
 211 * SSI (Serial Sound Interface)
 212 =============================================
 213
 214 **  PIO mode
 215
 216 You can use PIO mode which is for connection check by using.
 217 Note: The system will drop non-SSI modules in PIO mode
 218 even though if DT is selecting other modules.
 219
 220         &ssi0 {
 221                 pio-transfer
 222         };
 223
 224 ** DMA mode without SSIU
 225
 226 You can use DMA without SSIU.
 227 Note: under/over run, or noise are likely to occur
 228
 229         &ssi0 {
 230                 no-busif;
 231         };
 232
 233 ** PIN sharing
 234
 235 Each SSI can share WS pin. It is based on platform.
 236 This is example if SSI1 want to share WS pin with SSI0
 237
 238         &ssi1 {
 239                 shared-pin;
 240         };
 241
 242 ** Multi-SSI
 243
 244 You can use Multi-SSI.
 245 This is example of SSI0/SSI1/SSI2 (= for 6ch)
 246
 247 see "Example: simple sound card for Multi channel"
 248
 249 ** TDM-SSI
 250
 251 You can use TDM with SSI.
 252 This is example of TDM 6ch.
 253 Driver can automatically switches TDM <-> stereo mode in this case.
 254
 255 see "Example: simple sound card for TDM"
 256
 257 =============================================
 258 Required properties:
 259 =============================================
 260
 261 - compatible                    : "renesas,rcar_sound-<soctype>", fallbacks
 262                                   "renesas,rcar_sound-gen1" if generation1, and
 263                                   "renesas,rcar_sound-gen2" if generation2 (or RZ/G1)
 264                                   "renesas,rcar_sound-gen3" if generation3 (or RZ/G2)
 265                                   Examples with soctypes are:
 266                                     - "renesas,rcar_sound-r8a7743" (RZ/G1M)
 267                                     - "renesas,rcar_sound-r8a7744" (RZ/G1N)
 268                                     - "renesas,rcar_sound-r8a7745" (RZ/G1E)
 269                                     - "renesas,rcar_sound-r8a774a1" (RZ/G2M)
 270                                     - "renesas,rcar_sound-r8a774c0" (RZ/G2E)
 271                                     - "renesas,rcar_sound-r8a7778" (R-Car M1A)
 272                                     - "renesas,rcar_sound-r8a7779" (R-Car H1)
 273                                     - "renesas,rcar_sound-r8a7790" (R-Car H2)
 274                                     - "renesas,rcar_sound-r8a7791" (R-Car M2-W)
 275                                     - "renesas,rcar_sound-r8a7793" (R-Car M2-N)
 276                                     - "renesas,rcar_sound-r8a7794" (R-Car E2)
 277                                     - "renesas,rcar_sound-r8a7795" (R-Car H3)
 278                                     - "renesas,rcar_sound-r8a7796" (R-Car M3-W)
 279                                     - "renesas,rcar_sound-r8a77965" (R-Car M3-N)
 280                                     - "renesas,rcar_sound-r8a77990" (R-Car E3)
 281                                     - "renesas,rcar_sound-r8a77995" (R-Car D3)
 282 - reg                           : Should contain the register physical address.
 283                                   required register is
 284                                    SRU/ADG/SSI      if generation1
 285                                    SRU/ADG/SSIU/SSI if generation2
 286 - rcar_sound,ssi                : Should contain SSI feature.
 287                                   The number of SSI subnode should be same as HW.
 288                                   see below for detail.
 289 - rcar_sound,ssiu               : Should contain SSIU feature.
 290                                   The number of SSIU subnode should be same as HW.
 291                                   see below for detail.
 292 - rcar_sound,src                : Should contain SRC feature.
 293                                   The number of SRC subnode should be same as HW.
 294                                   see below for detail.
 295 - rcar_sound,ctu                : Should contain CTU feature.
 296                                   The number of CTU subnode should be same as HW.
 297                                   see below for detail.
 298 - rcar_sound,mix                : Should contain MIX feature.
 299                                   The number of MIX subnode should be same as HW.
 300                                   see below for detail.
 301 - rcar_sound,dvc                : Should contain DVC feature.
 302                                   The number of DVC subnode should be same as HW.
 303                                   see below for detail.
 304 - rcar_sound,dai                : DAI contents.
 305                                   The number of DAI subnode should be same as HW.
 306                                   see below for detail.
 307 - #sound-dai-cells              : it must be 0 if your system is using single DAI
 308                                   it must be 1 if your system is using multi  DAI
 309 - clocks                        : References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
 310 - clock-names                   : List of necessary clock names.
 311                                   "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
 312                                   "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
 313
 314 Optional properties:
 315 - #clock-cells                  : it must be 0 if your system has audio_clkout
 316                                   it must be 1 if your system has audio_clkout0/1/2/3
 317 - clock-frequency               : for all audio_clkout0/1/2/3
 318 - clkout-lr-asynchronous        : boolean property. it indicates that audio_clkoutn
 319                                   is asynchronizes with lr-clock.
 320 - resets                        : References to SSI resets.
 321 - reset-names                   : List of valid reset names.
 322                                   "ssi-all", "ssi.X"
 323
 324 SSI subnode properties:
 325 - interrupts                    : Should contain SSI interrupt for PIO transfer
 326 - shared-pin                    : if shared clock pin
 327 - pio-transfer                  : use PIO transfer mode
 328 - no-busif                      : BUSIF is not ussed when [mem -> SSI] via DMA case
 329 - dma                           : Should contain Audio DMAC entry
 330 - dma-names                     : SSI  case "rx"  (=playback), "tx"  (=capture)
 331                                   Deprecated: see SSIU subnode properties
 332                                   SSIU case "rxu" (=playback), "txu" (=capture)
 333
 334 SSIU subnode properties:
 335 - dma                           : Should contain Audio DMAC entry
 336 - dma-names                     : "rx" (=playback), "tx" (=capture)
 337
 338 SRC subnode properties:
 339 - dma                           : Should contain Audio DMAC entry
 340 - dma-names                     : "rx" (=playback), "tx" (=capture)
 341
 342 DVC subnode properties:
 343 - dma                           : Should contain Audio DMAC entry
 344 - dma-names                     : "tx" (=playback/capture)
 345
 346 DAI subnode properties:
 347 - playback                      : list of playback modules
 348 - capture                       : list of capture  modules
 349
 350
 351 =============================================
 352 Example:
 353 =============================================
 354
 355 rcar_sound: sound@ec500000 {
 356         #sound-dai-cells = <1>;
 357         compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
 358         reg =   <0 0xec500000 0 0x1000>, /* SCU */
 359                 <0 0xec5a0000 0 0x100>,  /* ADG */
 360                 <0 0xec540000 0 0x1000>, /* SSIU */
 361                 <0 0xec541000 0 0x1280>, /* SSI */
 362                 <0 0xec740000 0 0x200>;  /* Audio DMAC peri peri*/
 363         reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
 364
 365         clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
 366                 <&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
 367                 <&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
 368                 <&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
 369                 <&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
 370                 <&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
 371                 <&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
 372                 <&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
 373                 <&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
 374                 <&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
 375                 <&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
 376                 <&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
 377                 <&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
 378         clock-names = "ssi-all",
 379                         "ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
 380                         "ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
 381                         "src.9", "src.8", "src.7", "src.6", "src.5",
 382                         "src.4", "src.3", "src.2", "src.1", "src.0",
 383                         "dvc.0", "dvc.1",
 384                         "clk_a", "clk_b", "clk_c", "clk_i";
 385
 386         rcar_sound,dvc {
 387                 dvc0: dvc-0 {
 388                         dmas = <&audma0 0xbc>;
 389                         dma-names = "tx";
 390                 };
 391                 dvc1: dvc-1 {
 392                         dmas = <&audma0 0xbe>;
 393                         dma-names = "tx";
 394                 };
 395         };
 396
 397         rcar_sound,mix {
 398                 mix0: mix-0 { };
 399                 mix1: mix-1 { };
 400         };
 401
 402         rcar_sound,ctu {
 403                 ctu00: ctu-0 { };
 404                 ctu01: ctu-1 { };
 405                 ctu02: ctu-2 { };
 406                 ctu03: ctu-3 { };
 407                 ctu10: ctu-4 { };
 408                 ctu11: ctu-5 { };
 409                 ctu12: ctu-6 { };
 410                 ctu13: ctu-7 { };
 411         };
 412
 413         rcar_sound,src {
 414                 src0: src-0 {
 415                         interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
 416                         dmas = <&audma0 0x85>, <&audma1 0x9a>;
 417                         dma-names = "rx", "tx";
 418                 };
 419                 src1: src-1 {
 420                         interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
 421                         dmas = <&audma0 0x87>, <&audma1 0x9c>;
 422                         dma-names = "rx", "tx";
 423                 };
 424                 src2: src-2 {
 425                         interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
 426                         dmas = <&audma0 0x89>, <&audma1 0x9e>;
 427                         dma-names = "rx", "tx";
 428                 };
 429                 src3: src-3 {
 430                         interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
 431                         dmas = <&audma0 0x8b>, <&audma1 0xa0>;
 432                         dma-names = "rx", "tx";
 433                 };
 434                 src4: src-4 {
 435                         interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>;
 436                         dmas = <&audma0 0x8d>, <&audma1 0xb0>;
 437                         dma-names = "rx", "tx";
 438                 };
 439                 src5: src-5 {
 440                         interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>;
 441                         dmas = <&audma0 0x8f>, <&audma1 0xb2>;
 442                         dma-names = "rx", "tx";
 443                 };
 444                 src6: src-6 {
 445                         interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>;
 446                         dmas = <&audma0 0x91>, <&audma1 0xb4>;
 447                         dma-names = "rx", "tx";
 448                 };
 449                 src7: src-7 {
 450                         interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>;
 451                         dmas = <&audma0 0x93>, <&audma1 0xb6>;
 452                         dma-names = "rx", "tx";
 453                 };
 454                 src8: src-8 {
 455                         interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>;
 456                         dmas = <&audma0 0x95>, <&audma1 0xb8>;
 457                         dma-names = "rx", "tx";
 458                 };
 459                 src9: src-9 {
 460                         interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>;
 461                         dmas = <&audma0 0x97>, <&audma1 0xba>;
 462                         dma-names = "rx", "tx";
 463                 };
 464         };
 465
 466         rcar_sound,ssiu {
 467                 ssiu00: ssiu-0 {
 468                         dmas = <&audma0 0x15>, <&audma1 0x16>;
 469                         dma-names = "rx", "tx";
 470                 };
 471                 ssiu01: ssiu-1 {
 472                         dmas = <&audma0 0x35>, <&audma1 0x36>;
 473                         dma-names = "rx", "tx";
 474                 };
 475
 476                 ...
 477
 478                 ssiu95: ssiu-49 {
 479                         dmas = <&audma0 0xA5>, <&audma1 0xA6>;
 480                         dma-names = "rx", "tx";
 481                 };
 482                 ssiu96: ssiu-50 {
 483                         dmas = <&audma0 0xA7>, <&audma1 0xA8>;
 484                         dma-names = "rx", "tx";
 485                 };
 486                 ssiu97: ssiu-51 {
 487                         dmas = <&audma0 0xA9>, <&audma1 0xAA>;
 488                         dma-names = "rx", "tx";
 489                 };
 490         };
 491
 492         rcar_sound,ssi {
 493                 ssi0: ssi-0 {
 494                         interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
 495                         dmas = <&audma0 0x01>, <&audma1 0x02>;
 496                         dma-names = "rx", "tx";
 497                 };
 498                 ssi1: ssi-1 {
 499                         interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
 500                         dmas = <&audma0 0x03>, <&audma1 0x04>;
 501                         dma-names = "rx", "tx";
 502                 };
 503
 504                 ...
 505
 506                 ssi8: ssi-8 {
 507                         interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
 508                         dmas = <&audma0 0x11>, <&audma1 0x12>;
 509                         dma-names = "rx", "tx";
 510                 };
 511                 ssi9: ssi-9 {
 512                         interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
 513                         dmas = <&audma0 0x13>, <&audma1 0x14>;
 514                         dma-names = "rx", "tx";
 515                 };
 516         };
 517
 518         rcar_sound,dai {
 519                 dai0 {
 520                         playback = <&ssi5 &src5>;
 521                         capture  = <&ssi6>;
 522                 };
 523                 dai1 {
 524                         playback = <&ssi3>;
 525                 };
 526                 dai2 {
 527                         capture  = <&ssi4>;
 528                 };
 529                 dai3 {
 530                         playback = <&ssi7>;
 531                 };
 532                 dai4 {
 533                         capture  = <&ssi8>;
 534                 };
 535         };
 536 };
 537
 538 =============================================
 539 Example: simple sound card
 540 =============================================
 541
 542         rsnd_ak4643: sound {
 543                 compatible = "simple-audio-card";
 544
 545                 simple-audio-card,format = "left_j";
 546                 simple-audio-card,bitclock-master = <&sndcodec>;
 547                 simple-audio-card,frame-master = <&sndcodec>;
 548
 549                 sndcpu: simple-audio-card,cpu {
 550                         sound-dai = <&rcar_sound>;
 551                 };
 552
 553                 sndcodec: simple-audio-card,codec {
 554                         sound-dai = <&ak4643>;
 555                         clocks = <&audio_clock>;
 556                 };
 557         };
 558
 559 &rcar_sound {
 560         pinctrl-0 = <&sound_pins &sound_clk_pins>;
 561         pinctrl-names = "default";
 562
 563         /* Single DAI */
 564         #sound-dai-cells = <0>;
 565
 566
 567         rcar_sound,dai {
 568                 dai0 {
 569                         playback = <&ssi0 &src2 &dvc0>;
 570                         capture  = <&ssi1 &src3 &dvc1>;
 571                 };
 572         };
 573 };
 574
 575 &ssi1 {
 576         shared-pin;
 577 };
 578
 579 =============================================
 580 Example: simple sound card for Asynchronous mode
 581 =============================================
 582
 583 sound {
 584         compatible = "simple-scu-audio-card";
 585         ...
 586         /*
 587          * SRC Asynchronous mode setting
 588          * Playback:
 589          * All input data will be converted to 48kHz
 590          * Capture:
 591          * Inputed 48kHz data will be converted to
 592          * system specified Hz
 593          */
 594         simple-audio-card,convert-rate = <48000>;
 595         ...
 596         simple-audio-card,cpu {
 597                 sound-dai = <&rcar_sound>;
 598         };
 599         simple-audio-card,codec {
 600                 ...
 601         };
 602 };
 603
 604 =============================================
 605 Example: simple sound card for channel convert
 606 =============================================
 607
 608 sound {
 609         compatible = "simple-scu-audio-card";
 610         ...
 611         /*
 612          * CTU setting
 613          * All input data will be converted to 2ch
 614          * as output data
 615          */
 616         simple-audio-card,convert-channels = <2>;
 617         ...
 618         simple-audio-card,cpu {
 619                 sound-dai = <&rcar_sound>;
 620         };
 621         simple-audio-card,codec {
 622                 ...
 623         };
 624 };
 625
 626 =============================================
 627 Example: simple sound card for MIXer
 628 =============================================
 629
 630 sound {
 631         compatible = "simple-scu-audio-card";
 632         ...
 633         simple-audio-card,cpu@0 {
 634                 sound-dai = <&rcar_sound 0>;
 635         };
 636         simple-audio-card,cpu@1 {
 637                 sound-dai = <&rcar_sound 1>;
 638         };
 639         simple-audio-card,codec {
 640                 ...
 641         };
 642 };
 643
 644 &rcar_sound {
 645         ...
 646         rcar_sound,dai {
 647                 dai0 {
 648                         playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
 649                 };
 650                 dai1 {
 651                         playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
 652                 };
 653         };
 654 };
 655
 656 =============================================
 657 Example: simple sound card for TDM
 658 =============================================
 659
 660 rsnd_tdm: sound {
 661         compatible = "simple-audio-card";
 662
 663         simple-audio-card,format = "left_j";
 664         simple-audio-card,bitclock-master = <&sndcodec>;
 665         simple-audio-card,frame-master = <&sndcodec>;
 666
 667         sndcpu: simple-audio-card,cpu {
 668                 sound-dai = <&rcar_sound>;
 669                 dai-tdm-slot-num = <6>;
 670         };
 671
 672         sndcodec: simple-audio-card,codec {
 673                 sound-dai = <&xxx>;
 674         };
 675 };
 676
 677 =============================================
 678 Example: simple sound card for TDM Split
 679 =============================================
 680
 681 sound_card: sound {
 682         compatible = "audio-graph-scu-card";
 683         prefix = "xxxx";
 684         routing = "xxxx Playback", "DAI0 Playback",
 685                   "xxxx Playback", "DAI1 Playback",
 686                   "xxxx Playback", "DAI2 Playback",
 687                   "xxxx Playback", "DAI3 Playback";
 688         convert-channels = <8>; /* TDM Split */
 689
 690         dais = <&rsnd_port0     /* playback ch1/ch2 */
 691                 &rsnd_port1     /* playback ch3/ch4 */
 692                 &rsnd_port2     /* playback ch5/ch6 */
 693                 &rsnd_port3     /* playback ch7/ch8 */
 694                 >;
 695 };
 696
 697 audio-codec {
 698         ...
 699         port {
 700                 codec_0: endpoint@1 {
 701                         remote-endpoint = <&rsnd_ep0>;
 702                 };
 703                 codec_1: endpoint@2 {
 704                         remote-endpoint = <&rsnd_ep1>;
 705                 };
 706                 codec_2: endpoint@3 {
 707                         remote-endpoint = <&rsnd_ep2>;
 708                 };
 709                 codec_3: endpoint@4 {
 710                         remote-endpoint = <&rsnd_ep3>;
 711                 };
 712         };
 713 };
 714
 715 &rcar_sound {
 716         ...
 717         ports {
 718                 rsnd_port0: port@0 {
 719                         rsnd_ep0: endpoint {
 720                                 remote-endpoint = <&codec_0>;
 721                                 ...
 722                                 playback = <&ssiu30 &ssi3>;
 723                         };
 724                 };
 725                 rsnd_port1: port@1 {
 726                         rsnd_ep1: endpoint {
 727                                 remote-endpoint = <&codec_1>;
 728                                 ...
 729                                 playback = <&ssiu31 &ssi3>;
 730                         };
 731                 };
 732                 rsnd_port2: port@2 {
 733                         rsnd_ep2: endpoint {
 734                                 remote-endpoint = <&codec_2>;
 735                                 ...
 736                                 playback = <&ssiu32 &ssi3>;
 737                         };
 738                 };
 739                 rsnd_port3: port@3 {
 740                         rsnd_ep3: endpoint {
 741                                 remote-endpoint = <&codec_3>;
 742                                 ...
 743                                 playback = <&ssiu33 &ssi3>;
 744                         };
 745                 };
 746         };
 747 };
 748
 749 =============================================
 750 Example: simple sound card for Multi channel
 751 =============================================
 752
 753 &rcar_sound {
 754         pinctrl-0 = <&sound_pins &sound_clk_pins>;
 755         pinctrl-names = "default";
 756
 757         /* Single DAI */
 758         #sound-dai-cells = <0>;
 759
 760
 761         rcar_sound,dai {
 762                 dai0 {
 763                         playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
 764                 };
 765         };
 766 };