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-r8a77470" (RZ/G1C)
270				    - "renesas,rcar_sound-r8a774a1" (RZ/G2M)
271				    - "renesas,rcar_sound-r8a774b1" (RZ/G2N)
272				    - "renesas,rcar_sound-r8a774c0" (RZ/G2E)
273				    - "renesas,rcar_sound-r8a7778" (R-Car M1A)
274				    - "renesas,rcar_sound-r8a7779" (R-Car H1)
275				    - "renesas,rcar_sound-r8a7790" (R-Car H2)
276				    - "renesas,rcar_sound-r8a7791" (R-Car M2-W)
277				    - "renesas,rcar_sound-r8a7793" (R-Car M2-N)
278				    - "renesas,rcar_sound-r8a7794" (R-Car E2)
279				    - "renesas,rcar_sound-r8a7795" (R-Car H3)
280				    - "renesas,rcar_sound-r8a7796" (R-Car M3-W)
281				    - "renesas,rcar_sound-r8a77965" (R-Car M3-N)
282				    - "renesas,rcar_sound-r8a77990" (R-Car E3)
283				    - "renesas,rcar_sound-r8a77995" (R-Car D3)
284- reg				: Should contain the register physical address.
285				  required register is
286				   SRU/ADG/SSI      if generation1
287				   SRU/ADG/SSIU/SSI/AUDIO-DMAC-periperi if generation2/generation3
288				   Select extended AUDIO-DMAC-periperi address if SoC has it,
289				   otherwise select normal AUDIO-DMAC-periperi address.
290- reg-names			: Should contain the register names.
291				   scu/adg/ssi	if generation1
292				   scu/adg/ssiu/ssi/audmapp if generation2/generation3
293- rcar_sound,ssi		: Should contain SSI feature.
294				  The number of SSI subnode should be same as HW.
295				  see below for detail.
296- rcar_sound,ssiu		: Should contain SSIU feature.
297				  The number of SSIU subnode should be same as HW.
298				  see below for detail.
299- rcar_sound,src		: Should contain SRC feature.
300				  The number of SRC subnode should be same as HW.
301				  see below for detail.
302- rcar_sound,ctu		: Should contain CTU feature.
303				  The number of CTU subnode should be same as HW.
304				  see below for detail.
305- rcar_sound,mix		: Should contain MIX feature.
306				  The number of MIX subnode should be same as HW.
307				  see below for detail.
308- rcar_sound,dvc		: Should contain DVC feature.
309				  The number of DVC subnode should be same as HW.
310				  see below for detail.
311- rcar_sound,dai		: DAI contents.
312				  The number of DAI subnode should be same as HW.
313				  see below for detail.
314- #sound-dai-cells		: it must be 0 if your system is using single DAI
315				  it must be 1 if your system is using multi  DAI
316- clocks			: References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
317- clock-names			: List of necessary clock names.
318				  "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
319				  "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
320
321Optional properties:
322- #clock-cells			: it must be 0 if your system has audio_clkout
323				  it must be 1 if your system has audio_clkout0/1/2/3
324- clock-frequency		: for all audio_clkout0/1/2/3
325- clkout-lr-asynchronous	: boolean property. it indicates that audio_clkoutn
326				  is asynchronizes with lr-clock.
327- resets			: References to SSI resets.
328- reset-names			: List of valid reset names.
329				  "ssi-all", "ssi.X"
330
331SSI subnode properties:
332- interrupts			: Should contain SSI interrupt for PIO transfer
333- shared-pin			: if shared clock pin
334- pio-transfer			: use PIO transfer mode
335- no-busif			: BUSIF is not ussed when [mem -> SSI] via DMA case
336- dma				: Should contain Audio DMAC entry
337- dma-names			: SSI  case "rx"  (=playback), "tx"  (=capture)
338				  Deprecated: see SSIU subnode properties
339				  SSIU case "rxu" (=playback), "txu" (=capture)
340
341SSIU subnode properties:
342- dma				: Should contain Audio DMAC entry
343- dma-names			: "rx" (=playback), "tx" (=capture)
344
345SRC subnode properties:
346- dma				: Should contain Audio DMAC entry
347- dma-names			: "rx" (=playback), "tx" (=capture)
348
349DVC subnode properties:
350- dma				: Should contain Audio DMAC entry
351- dma-names			: "tx" (=playback/capture)
352
353DAI subnode properties:
354- playback			: list of playback modules
355- capture			: list of capture  modules
356
357
358=============================================
359Example:
360=============================================
361
362rcar_sound: sound@ec500000 {
363	#sound-dai-cells = <1>;
364	compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
365	reg =	<0 0xec500000 0 0x1000>, /* SCU */
366		<0 0xec5a0000 0 0x100>,  /* ADG */
367		<0 0xec540000 0 0x1000>, /* SSIU */
368		<0 0xec541000 0 0x1280>, /* SSI */
369		<0 0xec740000 0 0x200>;  /* Audio DMAC peri peri*/
370	reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
371
372	clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
373		<&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
374		<&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
375		<&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
376		<&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
377		<&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
378		<&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
379		<&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
380		<&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
381		<&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
382		<&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
383		<&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
384		<&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
385	clock-names = "ssi-all",
386			"ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
387			"ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
388			"src.9", "src.8", "src.7", "src.6", "src.5",
389			"src.4", "src.3", "src.2", "src.1", "src.0",
390			"dvc.0", "dvc.1",
391			"clk_a", "clk_b", "clk_c", "clk_i";
392
393	rcar_sound,dvc {
394		dvc0: dvc-0 {
395			dmas = <&audma0 0xbc>;
396			dma-names = "tx";
397		};
398		dvc1: dvc-1 {
399			dmas = <&audma0 0xbe>;
400			dma-names = "tx";
401		};
402	};
403
404	rcar_sound,mix {
405		mix0: mix-0 { };
406		mix1: mix-1 { };
407	};
408
409	rcar_sound,ctu {
410		ctu00: ctu-0 { };
411		ctu01: ctu-1 { };
412		ctu02: ctu-2 { };
413		ctu03: ctu-3 { };
414		ctu10: ctu-4 { };
415		ctu11: ctu-5 { };
416		ctu12: ctu-6 { };
417		ctu13: ctu-7 { };
418	};
419
420	rcar_sound,src {
421		src0: src-0 {
422			interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
423			dmas = <&audma0 0x85>, <&audma1 0x9a>;
424			dma-names = "rx", "tx";
425		};
426		src1: src-1 {
427			interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
428			dmas = <&audma0 0x87>, <&audma1 0x9c>;
429			dma-names = "rx", "tx";
430		};
431		src2: src-2 {
432			interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
433			dmas = <&audma0 0x89>, <&audma1 0x9e>;
434			dma-names = "rx", "tx";
435		};
436		src3: src-3 {
437			interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
438			dmas = <&audma0 0x8b>, <&audma1 0xa0>;
439			dma-names = "rx", "tx";
440		};
441		src4: src-4 {
442			interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>;
443			dmas = <&audma0 0x8d>, <&audma1 0xb0>;
444			dma-names = "rx", "tx";
445		};
446		src5: src-5 {
447			interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>;
448			dmas = <&audma0 0x8f>, <&audma1 0xb2>;
449			dma-names = "rx", "tx";
450		};
451		src6: src-6 {
452			interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>;
453			dmas = <&audma0 0x91>, <&audma1 0xb4>;
454			dma-names = "rx", "tx";
455		};
456		src7: src-7 {
457			interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>;
458			dmas = <&audma0 0x93>, <&audma1 0xb6>;
459			dma-names = "rx", "tx";
460		};
461		src8: src-8 {
462			interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>;
463			dmas = <&audma0 0x95>, <&audma1 0xb8>;
464			dma-names = "rx", "tx";
465		};
466		src9: src-9 {
467			interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>;
468			dmas = <&audma0 0x97>, <&audma1 0xba>;
469			dma-names = "rx", "tx";
470		};
471	};
472
473	rcar_sound,ssiu {
474		ssiu00: ssiu-0 {
475			dmas = <&audma0 0x15>, <&audma1 0x16>;
476			dma-names = "rx", "tx";
477		};
478		ssiu01: ssiu-1 {
479			dmas = <&audma0 0x35>, <&audma1 0x36>;
480			dma-names = "rx", "tx";
481		};
482
483		...
484
485		ssiu95: ssiu-49 {
486			dmas = <&audma0 0xA5>, <&audma1 0xA6>;
487			dma-names = "rx", "tx";
488		};
489		ssiu96: ssiu-50 {
490			dmas = <&audma0 0xA7>, <&audma1 0xA8>;
491			dma-names = "rx", "tx";
492		};
493		ssiu97: ssiu-51 {
494			dmas = <&audma0 0xA9>, <&audma1 0xAA>;
495			dma-names = "rx", "tx";
496		};
497	};
498
499	rcar_sound,ssi {
500		ssi0: ssi-0 {
501			interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
502			dmas = <&audma0 0x01>, <&audma1 0x02>;
503			dma-names = "rx", "tx";
504		};
505		ssi1: ssi-1 {
506			interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
507			dmas = <&audma0 0x03>, <&audma1 0x04>;
508			dma-names = "rx", "tx";
509		};
510
511		...
512
513		ssi8: ssi-8 {
514			interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
515			dmas = <&audma0 0x11>, <&audma1 0x12>;
516			dma-names = "rx", "tx";
517		};
518		ssi9: ssi-9 {
519			interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
520			dmas = <&audma0 0x13>, <&audma1 0x14>;
521			dma-names = "rx", "tx";
522		};
523	};
524
525	rcar_sound,dai {
526		dai0 {
527			playback = <&ssi5 &src5>;
528			capture  = <&ssi6>;
529		};
530		dai1 {
531			playback = <&ssi3>;
532		};
533		dai2 {
534			capture  = <&ssi4>;
535		};
536		dai3 {
537			playback = <&ssi7>;
538		};
539		dai4 {
540			capture  = <&ssi8>;
541		};
542	};
543};
544
545=============================================
546Example: simple sound card
547=============================================
548
549	rsnd_ak4643: sound {
550		compatible = "simple-audio-card";
551
552		simple-audio-card,format = "left_j";
553		simple-audio-card,bitclock-master = <&sndcodec>;
554		simple-audio-card,frame-master = <&sndcodec>;
555
556		sndcpu: simple-audio-card,cpu {
557			sound-dai = <&rcar_sound>;
558		};
559
560		sndcodec: simple-audio-card,codec {
561			sound-dai = <&ak4643>;
562			clocks = <&audio_clock>;
563		};
564	};
565
566&rcar_sound {
567	pinctrl-0 = <&sound_pins &sound_clk_pins>;
568	pinctrl-names = "default";
569
570	/* Single DAI */
571	#sound-dai-cells = <0>;
572
573
574	rcar_sound,dai {
575		dai0 {
576			playback = <&ssi0 &src2 &dvc0>;
577			capture  = <&ssi1 &src3 &dvc1>;
578		};
579	};
580};
581
582&ssi1 {
583	shared-pin;
584};
585
586=============================================
587Example: simple sound card for Asynchronous mode
588=============================================
589
590sound {
591	compatible = "simple-scu-audio-card";
592	...
593	/*
594	 * SRC Asynchronous mode setting
595	 * Playback:
596	 * All input data will be converted to 48kHz
597	 * Capture:
598	 * Inputed 48kHz data will be converted to
599	 * system specified Hz
600	 */
601	simple-audio-card,convert-rate = <48000>;
602	...
603	simple-audio-card,cpu {
604		sound-dai = <&rcar_sound>;
605	};
606	simple-audio-card,codec {
607		...
608	};
609};
610
611=============================================
612Example: simple sound card for channel convert
613=============================================
614
615sound {
616	compatible = "simple-scu-audio-card";
617	...
618	/*
619	 * CTU setting
620	 * All input data will be converted to 2ch
621	 * as output data
622	 */
623	simple-audio-card,convert-channels = <2>;
624	...
625	simple-audio-card,cpu {
626		sound-dai = <&rcar_sound>;
627	};
628	simple-audio-card,codec {
629		...
630	};
631};
632
633=============================================
634Example: simple sound card for MIXer
635=============================================
636
637sound {
638	compatible = "simple-scu-audio-card";
639	...
640	simple-audio-card,cpu@0 {
641		sound-dai = <&rcar_sound 0>;
642	};
643	simple-audio-card,cpu@1 {
644		sound-dai = <&rcar_sound 1>;
645	};
646	simple-audio-card,codec {
647		...
648	};
649};
650
651&rcar_sound {
652	...
653	rcar_sound,dai {
654		dai0 {
655			playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
656		};
657		dai1 {
658			playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
659		};
660	};
661};
662
663=============================================
664Example: simple sound card for TDM
665=============================================
666
667rsnd_tdm: sound {
668	compatible = "simple-audio-card";
669
670	simple-audio-card,format = "left_j";
671	simple-audio-card,bitclock-master = <&sndcodec>;
672	simple-audio-card,frame-master = <&sndcodec>;
673
674	sndcpu: simple-audio-card,cpu {
675		sound-dai = <&rcar_sound>;
676		dai-tdm-slot-num = <6>;
677	};
678
679	sndcodec: simple-audio-card,codec {
680		sound-dai = <&xxx>;
681	};
682};
683
684=============================================
685Example: simple sound card for TDM Split
686=============================================
687
688sound_card: sound {
689	compatible = "audio-graph-scu-card";
690	prefix = "xxxx";
691	routing = "xxxx Playback", "DAI0 Playback",
692		  "xxxx Playback", "DAI1 Playback",
693		  "xxxx Playback", "DAI2 Playback",
694		  "xxxx Playback", "DAI3 Playback";
695	convert-channels = <8>; /* TDM Split */
696
697	dais = <&rsnd_port0     /* playback ch1/ch2 */
698		&rsnd_port1     /* playback ch3/ch4 */
699		&rsnd_port2     /* playback ch5/ch6 */
700		&rsnd_port3     /* playback ch7/ch8 */
701		>;
702};
703
704audio-codec {
705	...
706	port {
707		codec_0: endpoint@1 {
708			remote-endpoint = <&rsnd_ep0>;
709		};
710		codec_1: endpoint@2 {
711			remote-endpoint = <&rsnd_ep1>;
712		};
713		codec_2: endpoint@3 {
714			remote-endpoint = <&rsnd_ep2>;
715		};
716		codec_3: endpoint@4 {
717			remote-endpoint = <&rsnd_ep3>;
718		};
719	};
720};
721
722&rcar_sound {
723	...
724	ports {
725		rsnd_port0: port@0 {
726			rsnd_ep0: endpoint {
727				remote-endpoint = <&codec_0>;
728				...
729				playback = <&ssiu30 &ssi3>;
730			};
731		};
732		rsnd_port1: port@1 {
733			rsnd_ep1: endpoint {
734				remote-endpoint = <&codec_1>;
735				...
736				playback = <&ssiu31 &ssi3>;
737			};
738		};
739		rsnd_port2: port@2 {
740			rsnd_ep2: endpoint {
741				remote-endpoint = <&codec_2>;
742				...
743				playback = <&ssiu32 &ssi3>;
744			};
745		};
746		rsnd_port3: port@3 {
747			rsnd_ep3: endpoint {
748				remote-endpoint = <&codec_3>;
749				...
750				playback = <&ssiu33 &ssi3>;
751			};
752		};
753	};
754};
755
756=============================================
757Example: simple sound card for Multi channel
758=============================================
759
760&rcar_sound {
761	pinctrl-0 = <&sound_pins &sound_clk_pins>;
762	pinctrl-names = "default";
763
764	/* Single DAI */
765	#sound-dai-cells = <0>;
766
767
768	rcar_sound,dai {
769		dai0 {
770			playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
771		};
772	};
773};
774