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-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
314Optional 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
324SSI 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
334SSIU subnode properties:
335- dma				: Should contain Audio DMAC entry
336- dma-names			: "rx" (=playback), "tx" (=capture)
337
338SRC subnode properties:
339- dma				: Should contain Audio DMAC entry
340- dma-names			: "rx" (=playback), "tx" (=capture)
341
342DVC subnode properties:
343- dma				: Should contain Audio DMAC entry
344- dma-names			: "tx" (=playback/capture)
345
346DAI subnode properties:
347- playback			: list of playback modules
348- capture			: list of capture  modules
349
350
351=============================================
352Example:
353=============================================
354
355rcar_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=============================================
539Example: 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=============================================
580Example: simple sound card for Asynchronous mode
581=============================================
582
583sound {
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=============================================
605Example: simple sound card for channel convert
606=============================================
607
608sound {
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=============================================
627Example: simple sound card for MIXer
628=============================================
629
630sound {
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=============================================
657Example: simple sound card for TDM
658=============================================
659
660rsnd_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=============================================
678Example: simple sound card for TDM Split
679=============================================
680
681sound_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
697audio-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=============================================
750Example: 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};
767