1Renesas R-Car sound 2 3============================================= 4* Modules 5============================================= 6 7Renesas 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 19See detail of each module's channels, connection, limitation on datasheet 20 21============================================= 22* Multi channel 23============================================= 24 25Multi 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 34See datasheet to check SRC/CTU/MIX/DVC connect-limitation. 35DT controls enabling/disabling module. 36${LINUX}/arch/arm/boot/dts/r8a7790-lager.dts can be good example. 37This is example of 38 39Playback: [MEM] -> [SRC2] -> [DVC0] -> [SSIU0/SSI0] -> [codec] 40Capture: [MEM] <- [DVC1] <- [SRC3] <- [SSIU1/SSI1] <- [codec] 41 42see "Example: simple sound card" 43 44You can use below. 45${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 65SRC 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 78You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it. 79see "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 97CTU can convert [xx]ch to [yy]ch, or exchange outputed channel. 98CTU conversion needs matrix settings. 99For 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 115You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it. 116see "Example: simple sound card for channel convert" 117 118Ex) 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 140MIX merges 2 sounds path. You can see 2 sound interface on system, 141and 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 146You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it. 147Ex) 148 [MEM] -> [SRC1] -> [CTU02] -+-> [MIX0] -> [DVC0] -> [SSI0] 149 | 150 [MEM] -> [SRC2] -> [CTU03] -+ 151 152see "Example: simple sound card for MIXer" 153 154============================================= 155* DVC (Digital Volume and Mute Function) 156============================================= 157 158DVC controls Playback/Capture volume. 159 160Playback Volume 161 amixer set "DVC Out" 100% 162 163Capture Volume 164 amixer set "DVC In" 100% 165 166Playback Mute 167 amixer set "DVC Out Mute" on 168 169Capture Mute 170 amixer set "DVC In Mute" on 171 172Volume 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 184SSIU can avoid some under/over run error, because it has some buffer. 185But you can't use it if SSI was PIO mode. 186In DMA mode, you can select not to use SSIU by using "no-busif" via SSI. 187 188SSIU handles BUSIF which will be used for TDM Split mode. 189This driver is assuming that audio-graph card will be used. 190 191TDM Split mode merges 4 sounds. You can see 4 sound interface on system, 192and 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 208see "Example: simple sound card for TDM Split" 209 210============================================= 211* SSI (Serial Sound Interface) 212============================================= 213 214** PIO mode 215 216You can use PIO mode which is for connection check by using. 217Note: The system will drop non-SSI modules in PIO mode 218even though if DT is selecting other modules. 219 220 &ssi0 { 221 pio-transfer 222 }; 223 224** DMA mode without SSIU 225 226You can use DMA without SSIU. 227Note: under/over run, or noise are likely to occur 228 229 &ssi0 { 230 no-busif; 231 }; 232 233** PIN sharing 234 235Each SSI can share WS pin. It is based on platform. 236This is example if SSI1 want to share WS pin with SSI0 237 238 &ssi1 { 239 shared-pin; 240 }; 241 242** Multi-SSI 243 244You can use Multi-SSI. 245This is example of SSI0/SSI1/SSI2 (= for 6ch) 246 247see "Example: simple sound card for Multi channel" 248 249** TDM-SSI 250 251You can use TDM with SSI. 252This is example of TDM 6ch. 253Driver can automatically switches TDM <-> stereo mode in this case. 254 255see "Example: simple sound card for TDM" 256 257============================================= 258Required 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-r8a7742" (RZ/G1H) 267 - "renesas,rcar_sound-r8a7743" (RZ/G1M) 268 - "renesas,rcar_sound-r8a7744" (RZ/G1N) 269 - "renesas,rcar_sound-r8a7745" (RZ/G1E) 270 - "renesas,rcar_sound-r8a77470" (RZ/G1C) 271 - "renesas,rcar_sound-r8a774a1" (RZ/G2M) 272 - "renesas,rcar_sound-r8a774b1" (RZ/G2N) 273 - "renesas,rcar_sound-r8a774c0" (RZ/G2E) 274 - "renesas,rcar_sound-r8a7778" (R-Car M1A) 275 - "renesas,rcar_sound-r8a7779" (R-Car H1) 276 - "renesas,rcar_sound-r8a7790" (R-Car H2) 277 - "renesas,rcar_sound-r8a7791" (R-Car M2-W) 278 - "renesas,rcar_sound-r8a7793" (R-Car M2-N) 279 - "renesas,rcar_sound-r8a7794" (R-Car E2) 280 - "renesas,rcar_sound-r8a7795" (R-Car H3) 281 - "renesas,rcar_sound-r8a7796" (R-Car M3-W) 282 - "renesas,rcar_sound-r8a77965" (R-Car M3-N) 283 - "renesas,rcar_sound-r8a77990" (R-Car E3) 284 - "renesas,rcar_sound-r8a77995" (R-Car D3) 285- reg : Should contain the register physical address. 286 required register is 287 SRU/ADG/SSI if generation1 288 SRU/ADG/SSIU/SSI/AUDIO-DMAC-periperi if generation2/generation3 289 Select extended AUDIO-DMAC-periperi address if SoC has it, 290 otherwise select normal AUDIO-DMAC-periperi address. 291- reg-names : Should contain the register names. 292 scu/adg/ssi if generation1 293 scu/adg/ssiu/ssi/audmapp if generation2/generation3 294- rcar_sound,ssi : Should contain SSI feature. 295 The number of SSI subnode should be same as HW. 296 see below for detail. 297- rcar_sound,ssiu : Should contain SSIU feature. 298 The number of SSIU subnode should be same as HW. 299 see below for detail. 300- rcar_sound,src : Should contain SRC feature. 301 The number of SRC subnode should be same as HW. 302 see below for detail. 303- rcar_sound,ctu : Should contain CTU feature. 304 The number of CTU subnode should be same as HW. 305 see below for detail. 306- rcar_sound,mix : Should contain MIX feature. 307 The number of MIX subnode should be same as HW. 308 see below for detail. 309- rcar_sound,dvc : Should contain DVC feature. 310 The number of DVC subnode should be same as HW. 311 see below for detail. 312- rcar_sound,dai : DAI contents. 313 The number of DAI subnode should be same as HW. 314 see below for detail. 315- #sound-dai-cells : it must be 0 if your system is using single DAI 316 it must be 1 if your system is using multi DAI 317- clocks : References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks. 318- clock-names : List of necessary clock names. 319 "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X", 320 "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i" 321 322Optional properties: 323- #clock-cells : it must be 0 if your system has audio_clkout 324 it must be 1 if your system has audio_clkout0/1/2/3 325- clock-frequency : for all audio_clkout0/1/2/3 326- clkout-lr-asynchronous : boolean property. it indicates that audio_clkoutn 327 is asynchronizes with lr-clock. 328- resets : References to SSI resets. 329- reset-names : List of valid reset names. 330 "ssi-all", "ssi.X" 331 332SSI subnode properties: 333- interrupts : Should contain SSI interrupt for PIO transfer 334- shared-pin : if shared clock pin 335- pio-transfer : use PIO transfer mode 336- no-busif : BUSIF is not ussed when [mem -> SSI] via DMA case 337- dma : Should contain Audio DMAC entry 338- dma-names : SSI case "rx" (=playback), "tx" (=capture) 339 Deprecated: see SSIU subnode properties 340 SSIU case "rxu" (=playback), "txu" (=capture) 341 342SSIU subnode properties: 343- dma : Should contain Audio DMAC entry 344- dma-names : "rx" (=playback), "tx" (=capture) 345 346SRC subnode properties: 347- dma : Should contain Audio DMAC entry 348- dma-names : "rx" (=playback), "tx" (=capture) 349 350DVC subnode properties: 351- dma : Should contain Audio DMAC entry 352- dma-names : "tx" (=playback/capture) 353 354DAI subnode properties: 355- playback : list of playback modules 356- capture : list of capture modules 357 358 359============================================= 360Example: 361============================================= 362 363rcar_sound: sound@ec500000 { 364 #sound-dai-cells = <1>; 365 compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2"; 366 reg = <0 0xec500000 0 0x1000>, /* SCU */ 367 <0 0xec5a0000 0 0x100>, /* ADG */ 368 <0 0xec540000 0 0x1000>, /* SSIU */ 369 <0 0xec541000 0 0x1280>, /* SSI */ 370 <0 0xec740000 0 0x200>; /* Audio DMAC peri peri*/ 371 reg-names = "scu", "adg", "ssiu", "ssi", "audmapp"; 372 373 clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>, 374 <&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>, 375 <&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>, 376 <&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>, 377 <&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>, 378 <&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>, 379 <&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>, 380 <&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>, 381 <&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>, 382 <&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>, 383 <&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>, 384 <&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>, 385 <&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>; 386 clock-names = "ssi-all", 387 "ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5", 388 "ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0", 389 "src.9", "src.8", "src.7", "src.6", "src.5", 390 "src.4", "src.3", "src.2", "src.1", "src.0", 391 "dvc.0", "dvc.1", 392 "clk_a", "clk_b", "clk_c", "clk_i"; 393 394 rcar_sound,dvc { 395 dvc0: dvc-0 { 396 dmas = <&audma0 0xbc>; 397 dma-names = "tx"; 398 }; 399 dvc1: dvc-1 { 400 dmas = <&audma0 0xbe>; 401 dma-names = "tx"; 402 }; 403 }; 404 405 rcar_sound,mix { 406 mix0: mix-0 { }; 407 mix1: mix-1 { }; 408 }; 409 410 rcar_sound,ctu { 411 ctu00: ctu-0 { }; 412 ctu01: ctu-1 { }; 413 ctu02: ctu-2 { }; 414 ctu03: ctu-3 { }; 415 ctu10: ctu-4 { }; 416 ctu11: ctu-5 { }; 417 ctu12: ctu-6 { }; 418 ctu13: ctu-7 { }; 419 }; 420 421 rcar_sound,src { 422 src0: src-0 { 423 interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>; 424 dmas = <&audma0 0x85>, <&audma1 0x9a>; 425 dma-names = "rx", "tx"; 426 }; 427 src1: src-1 { 428 interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>; 429 dmas = <&audma0 0x87>, <&audma1 0x9c>; 430 dma-names = "rx", "tx"; 431 }; 432 src2: src-2 { 433 interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>; 434 dmas = <&audma0 0x89>, <&audma1 0x9e>; 435 dma-names = "rx", "tx"; 436 }; 437 src3: src-3 { 438 interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>; 439 dmas = <&audma0 0x8b>, <&audma1 0xa0>; 440 dma-names = "rx", "tx"; 441 }; 442 src4: src-4 { 443 interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>; 444 dmas = <&audma0 0x8d>, <&audma1 0xb0>; 445 dma-names = "rx", "tx"; 446 }; 447 src5: src-5 { 448 interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>; 449 dmas = <&audma0 0x8f>, <&audma1 0xb2>; 450 dma-names = "rx", "tx"; 451 }; 452 src6: src-6 { 453 interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>; 454 dmas = <&audma0 0x91>, <&audma1 0xb4>; 455 dma-names = "rx", "tx"; 456 }; 457 src7: src-7 { 458 interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>; 459 dmas = <&audma0 0x93>, <&audma1 0xb6>; 460 dma-names = "rx", "tx"; 461 }; 462 src8: src-8 { 463 interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>; 464 dmas = <&audma0 0x95>, <&audma1 0xb8>; 465 dma-names = "rx", "tx"; 466 }; 467 src9: src-9 { 468 interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>; 469 dmas = <&audma0 0x97>, <&audma1 0xba>; 470 dma-names = "rx", "tx"; 471 }; 472 }; 473 474 rcar_sound,ssiu { 475 ssiu00: ssiu-0 { 476 dmas = <&audma0 0x15>, <&audma1 0x16>; 477 dma-names = "rx", "tx"; 478 }; 479 ssiu01: ssiu-1 { 480 dmas = <&audma0 0x35>, <&audma1 0x36>; 481 dma-names = "rx", "tx"; 482 }; 483 484 ... 485 486 ssiu95: ssiu-49 { 487 dmas = <&audma0 0xA5>, <&audma1 0xA6>; 488 dma-names = "rx", "tx"; 489 }; 490 ssiu96: ssiu-50 { 491 dmas = <&audma0 0xA7>, <&audma1 0xA8>; 492 dma-names = "rx", "tx"; 493 }; 494 ssiu97: ssiu-51 { 495 dmas = <&audma0 0xA9>, <&audma1 0xAA>; 496 dma-names = "rx", "tx"; 497 }; 498 }; 499 500 rcar_sound,ssi { 501 ssi0: ssi-0 { 502 interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>; 503 dmas = <&audma0 0x01>, <&audma1 0x02>; 504 dma-names = "rx", "tx"; 505 }; 506 ssi1: ssi-1 { 507 interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>; 508 dmas = <&audma0 0x03>, <&audma1 0x04>; 509 dma-names = "rx", "tx"; 510 }; 511 512 ... 513 514 ssi8: ssi-8 { 515 interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>; 516 dmas = <&audma0 0x11>, <&audma1 0x12>; 517 dma-names = "rx", "tx"; 518 }; 519 ssi9: ssi-9 { 520 interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>; 521 dmas = <&audma0 0x13>, <&audma1 0x14>; 522 dma-names = "rx", "tx"; 523 }; 524 }; 525 526 rcar_sound,dai { 527 dai0 { 528 playback = <&ssi5 &src5>; 529 capture = <&ssi6>; 530 }; 531 dai1 { 532 playback = <&ssi3>; 533 }; 534 dai2 { 535 capture = <&ssi4>; 536 }; 537 dai3 { 538 playback = <&ssi7>; 539 }; 540 dai4 { 541 capture = <&ssi8>; 542 }; 543 }; 544}; 545 546============================================= 547Example: simple sound card 548============================================= 549 550 rsnd_ak4643: sound { 551 compatible = "simple-audio-card"; 552 553 simple-audio-card,format = "left_j"; 554 simple-audio-card,bitclock-master = <&sndcodec>; 555 simple-audio-card,frame-master = <&sndcodec>; 556 557 sndcpu: simple-audio-card,cpu { 558 sound-dai = <&rcar_sound>; 559 }; 560 561 sndcodec: simple-audio-card,codec { 562 sound-dai = <&ak4643>; 563 clocks = <&audio_clock>; 564 }; 565 }; 566 567&rcar_sound { 568 pinctrl-0 = <&sound_pins &sound_clk_pins>; 569 pinctrl-names = "default"; 570 571 /* Single DAI */ 572 #sound-dai-cells = <0>; 573 574 575 rcar_sound,dai { 576 dai0 { 577 playback = <&ssi0 &src2 &dvc0>; 578 capture = <&ssi1 &src3 &dvc1>; 579 }; 580 }; 581}; 582 583&ssi1 { 584 shared-pin; 585}; 586 587============================================= 588Example: simple sound card for Asynchronous mode 589============================================= 590 591sound { 592 compatible = "simple-scu-audio-card"; 593 ... 594 /* 595 * SRC Asynchronous mode setting 596 * Playback: 597 * All input data will be converted to 48kHz 598 * Capture: 599 * Inputed 48kHz data will be converted to 600 * system specified Hz 601 */ 602 simple-audio-card,convert-rate = <48000>; 603 ... 604 simple-audio-card,cpu { 605 sound-dai = <&rcar_sound>; 606 }; 607 simple-audio-card,codec { 608 ... 609 }; 610}; 611 612============================================= 613Example: simple sound card for channel convert 614============================================= 615 616sound { 617 compatible = "simple-scu-audio-card"; 618 ... 619 /* 620 * CTU setting 621 * All input data will be converted to 2ch 622 * as output data 623 */ 624 simple-audio-card,convert-channels = <2>; 625 ... 626 simple-audio-card,cpu { 627 sound-dai = <&rcar_sound>; 628 }; 629 simple-audio-card,codec { 630 ... 631 }; 632}; 633 634============================================= 635Example: simple sound card for MIXer 636============================================= 637 638sound { 639 compatible = "simple-scu-audio-card"; 640 ... 641 simple-audio-card,cpu@0 { 642 sound-dai = <&rcar_sound 0>; 643 }; 644 simple-audio-card,cpu@1 { 645 sound-dai = <&rcar_sound 1>; 646 }; 647 simple-audio-card,codec { 648 ... 649 }; 650}; 651 652&rcar_sound { 653 ... 654 rcar_sound,dai { 655 dai0 { 656 playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>; 657 }; 658 dai1 { 659 playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>; 660 }; 661 }; 662}; 663 664============================================= 665Example: simple sound card for TDM 666============================================= 667 668rsnd_tdm: sound { 669 compatible = "simple-audio-card"; 670 671 simple-audio-card,format = "left_j"; 672 simple-audio-card,bitclock-master = <&sndcodec>; 673 simple-audio-card,frame-master = <&sndcodec>; 674 675 sndcpu: simple-audio-card,cpu { 676 sound-dai = <&rcar_sound>; 677 dai-tdm-slot-num = <6>; 678 }; 679 680 sndcodec: simple-audio-card,codec { 681 sound-dai = <&xxx>; 682 }; 683}; 684 685============================================= 686Example: simple sound card for TDM Split 687============================================= 688 689sound_card: sound { 690 compatible = "audio-graph-scu-card"; 691 prefix = "xxxx"; 692 routing = "xxxx Playback", "DAI0 Playback", 693 "xxxx Playback", "DAI1 Playback", 694 "xxxx Playback", "DAI2 Playback", 695 "xxxx Playback", "DAI3 Playback"; 696 convert-channels = <8>; /* TDM Split */ 697 698 dais = <&rsnd_port0 /* playback ch1/ch2 */ 699 &rsnd_port1 /* playback ch3/ch4 */ 700 &rsnd_port2 /* playback ch5/ch6 */ 701 &rsnd_port3 /* playback ch7/ch8 */ 702 >; 703}; 704 705audio-codec { 706 ... 707 port { 708 codec_0: endpoint@1 { 709 remote-endpoint = <&rsnd_ep0>; 710 }; 711 codec_1: endpoint@2 { 712 remote-endpoint = <&rsnd_ep1>; 713 }; 714 codec_2: endpoint@3 { 715 remote-endpoint = <&rsnd_ep2>; 716 }; 717 codec_3: endpoint@4 { 718 remote-endpoint = <&rsnd_ep3>; 719 }; 720 }; 721}; 722 723&rcar_sound { 724 ... 725 ports { 726 rsnd_port0: port@0 { 727 rsnd_ep0: endpoint { 728 remote-endpoint = <&codec_0>; 729 ... 730 playback = <&ssiu30 &ssi3>; 731 }; 732 }; 733 rsnd_port1: port@1 { 734 rsnd_ep1: endpoint { 735 remote-endpoint = <&codec_1>; 736 ... 737 playback = <&ssiu31 &ssi3>; 738 }; 739 }; 740 rsnd_port2: port@2 { 741 rsnd_ep2: endpoint { 742 remote-endpoint = <&codec_2>; 743 ... 744 playback = <&ssiu32 &ssi3>; 745 }; 746 }; 747 rsnd_port3: port@3 { 748 rsnd_ep3: endpoint { 749 remote-endpoint = <&codec_3>; 750 ... 751 playback = <&ssiu33 &ssi3>; 752 }; 753 }; 754 }; 755}; 756 757============================================= 758Example: simple sound card for Multi channel 759============================================= 760 761&rcar_sound { 762 pinctrl-0 = <&sound_pins &sound_clk_pins>; 763 pinctrl-names = "default"; 764 765 /* Single DAI */ 766 #sound-dai-cells = <0>; 767 768 769 rcar_sound,dai { 770 dai0 { 771 playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>; 772 }; 773 }; 774}; 775