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-r8a774e1" (RZ/G2H)
275				    - "renesas,rcar_sound-r8a7778" (R-Car M1A)
276				    - "renesas,rcar_sound-r8a7779" (R-Car H1)
277				    - "renesas,rcar_sound-r8a7790" (R-Car H2)
278				    - "renesas,rcar_sound-r8a7791" (R-Car M2-W)
279				    - "renesas,rcar_sound-r8a7793" (R-Car M2-N)
280				    - "renesas,rcar_sound-r8a7794" (R-Car E2)
281				    - "renesas,rcar_sound-r8a7795" (R-Car H3)
282				    - "renesas,rcar_sound-r8a7796" (R-Car M3-W)
283				    - "renesas,rcar_sound-r8a77965" (R-Car M3-N)
284				    - "renesas,rcar_sound-r8a77990" (R-Car E3)
285				    - "renesas,rcar_sound-r8a77995" (R-Car D3)
286- reg				: Should contain the register physical address.
287				  required register is
288				   SRU/ADG/SSI      if generation1
289				   SRU/ADG/SSIU/SSI/AUDIO-DMAC-periperi if generation2/generation3
290				   Select extended AUDIO-DMAC-periperi address if SoC has it,
291				   otherwise select normal AUDIO-DMAC-periperi address.
292- reg-names			: Should contain the register names.
293				   scu/adg/ssi	if generation1
294				   scu/adg/ssiu/ssi/audmapp if generation2/generation3
295- rcar_sound,ssi		: Should contain SSI feature.
296				  The number of SSI subnode should be same as HW.
297				  see below for detail.
298- rcar_sound,ssiu		: Should contain SSIU feature.
299				  The number of SSIU subnode should be same as HW.
300				  see below for detail.
301- rcar_sound,src		: Should contain SRC feature.
302				  The number of SRC subnode should be same as HW.
303				  see below for detail.
304- rcar_sound,ctu		: Should contain CTU feature.
305				  The number of CTU subnode should be same as HW.
306				  see below for detail.
307- rcar_sound,mix		: Should contain MIX feature.
308				  The number of MIX subnode should be same as HW.
309				  see below for detail.
310- rcar_sound,dvc		: Should contain DVC feature.
311				  The number of DVC subnode should be same as HW.
312				  see below for detail.
313- rcar_sound,dai		: DAI contents.
314				  The number of DAI subnode should be same as HW.
315				  see below for detail.
316- #sound-dai-cells		: it must be 0 if your system is using single DAI
317				  it must be 1 if your system is using multi  DAI
318- clocks			: References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
319- clock-names			: List of necessary clock names.
320				  "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
321				  "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
322
323Optional properties:
324- #clock-cells			: it must be 0 if your system has audio_clkout
325				  it must be 1 if your system has audio_clkout0/1/2/3
326- clock-frequency		: for all audio_clkout0/1/2/3
327- clkout-lr-asynchronous	: boolean property. it indicates that audio_clkoutn
328				  is asynchronizes with lr-clock.
329- resets			: References to SSI resets.
330- reset-names			: List of valid reset names.
331				  "ssi-all", "ssi.X"
332
333SSI subnode properties:
334- interrupts			: Should contain SSI interrupt for PIO transfer
335- shared-pin			: if shared clock pin
336- pio-transfer			: use PIO transfer mode
337- no-busif			: BUSIF is not ussed when [mem -> SSI] via DMA case
338- dma				: Should contain Audio DMAC entry
339- dma-names			: SSI  case "rx"  (=playback), "tx"  (=capture)
340				  Deprecated: see SSIU subnode properties
341				  SSIU case "rxu" (=playback), "txu" (=capture)
342
343SSIU subnode properties:
344- dma				: Should contain Audio DMAC entry
345- dma-names			: "rx" (=playback), "tx" (=capture)
346
347SRC subnode properties:
348- dma				: Should contain Audio DMAC entry
349- dma-names			: "rx" (=playback), "tx" (=capture)
350
351DVC subnode properties:
352- dma				: Should contain Audio DMAC entry
353- dma-names			: "tx" (=playback/capture)
354
355DAI subnode properties:
356- playback			: list of playback modules
357- capture			: list of capture  modules
358
359
360=============================================
361Example:
362=============================================
363
364rcar_sound: sound@ec500000 {
365	#sound-dai-cells = <1>;
366	compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
367	reg =	<0 0xec500000 0 0x1000>, /* SCU */
368		<0 0xec5a0000 0 0x100>,  /* ADG */
369		<0 0xec540000 0 0x1000>, /* SSIU */
370		<0 0xec541000 0 0x1280>, /* SSI */
371		<0 0xec740000 0 0x200>;  /* Audio DMAC peri peri*/
372	reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
373
374	clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
375		<&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
376		<&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
377		<&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
378		<&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
379		<&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
380		<&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
381		<&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
382		<&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
383		<&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
384		<&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
385		<&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
386		<&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
387	clock-names = "ssi-all",
388			"ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
389			"ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
390			"src.9", "src.8", "src.7", "src.6", "src.5",
391			"src.4", "src.3", "src.2", "src.1", "src.0",
392			"dvc.0", "dvc.1",
393			"clk_a", "clk_b", "clk_c", "clk_i";
394
395	rcar_sound,dvc {
396		dvc0: dvc-0 {
397			dmas = <&audma0 0xbc>;
398			dma-names = "tx";
399		};
400		dvc1: dvc-1 {
401			dmas = <&audma0 0xbe>;
402			dma-names = "tx";
403		};
404	};
405
406	rcar_sound,mix {
407		mix0: mix-0 { };
408		mix1: mix-1 { };
409	};
410
411	rcar_sound,ctu {
412		ctu00: ctu-0 { };
413		ctu01: ctu-1 { };
414		ctu02: ctu-2 { };
415		ctu03: ctu-3 { };
416		ctu10: ctu-4 { };
417		ctu11: ctu-5 { };
418		ctu12: ctu-6 { };
419		ctu13: ctu-7 { };
420	};
421
422	rcar_sound,src {
423		src0: src-0 {
424			interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
425			dmas = <&audma0 0x85>, <&audma1 0x9a>;
426			dma-names = "rx", "tx";
427		};
428		src1: src-1 {
429			interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
430			dmas = <&audma0 0x87>, <&audma1 0x9c>;
431			dma-names = "rx", "tx";
432		};
433		src2: src-2 {
434			interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
435			dmas = <&audma0 0x89>, <&audma1 0x9e>;
436			dma-names = "rx", "tx";
437		};
438		src3: src-3 {
439			interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
440			dmas = <&audma0 0x8b>, <&audma1 0xa0>;
441			dma-names = "rx", "tx";
442		};
443		src4: src-4 {
444			interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>;
445			dmas = <&audma0 0x8d>, <&audma1 0xb0>;
446			dma-names = "rx", "tx";
447		};
448		src5: src-5 {
449			interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>;
450			dmas = <&audma0 0x8f>, <&audma1 0xb2>;
451			dma-names = "rx", "tx";
452		};
453		src6: src-6 {
454			interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>;
455			dmas = <&audma0 0x91>, <&audma1 0xb4>;
456			dma-names = "rx", "tx";
457		};
458		src7: src-7 {
459			interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>;
460			dmas = <&audma0 0x93>, <&audma1 0xb6>;
461			dma-names = "rx", "tx";
462		};
463		src8: src-8 {
464			interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>;
465			dmas = <&audma0 0x95>, <&audma1 0xb8>;
466			dma-names = "rx", "tx";
467		};
468		src9: src-9 {
469			interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>;
470			dmas = <&audma0 0x97>, <&audma1 0xba>;
471			dma-names = "rx", "tx";
472		};
473	};
474
475	rcar_sound,ssiu {
476		ssiu00: ssiu-0 {
477			dmas = <&audma0 0x15>, <&audma1 0x16>;
478			dma-names = "rx", "tx";
479		};
480		ssiu01: ssiu-1 {
481			dmas = <&audma0 0x35>, <&audma1 0x36>;
482			dma-names = "rx", "tx";
483		};
484
485		...
486
487		ssiu95: ssiu-49 {
488			dmas = <&audma0 0xA5>, <&audma1 0xA6>;
489			dma-names = "rx", "tx";
490		};
491		ssiu96: ssiu-50 {
492			dmas = <&audma0 0xA7>, <&audma1 0xA8>;
493			dma-names = "rx", "tx";
494		};
495		ssiu97: ssiu-51 {
496			dmas = <&audma0 0xA9>, <&audma1 0xAA>;
497			dma-names = "rx", "tx";
498		};
499	};
500
501	rcar_sound,ssi {
502		ssi0: ssi-0 {
503			interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
504			dmas = <&audma0 0x01>, <&audma1 0x02>;
505			dma-names = "rx", "tx";
506		};
507		ssi1: ssi-1 {
508			interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
509			dmas = <&audma0 0x03>, <&audma1 0x04>;
510			dma-names = "rx", "tx";
511		};
512
513		...
514
515		ssi8: ssi-8 {
516			interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
517			dmas = <&audma0 0x11>, <&audma1 0x12>;
518			dma-names = "rx", "tx";
519		};
520		ssi9: ssi-9 {
521			interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
522			dmas = <&audma0 0x13>, <&audma1 0x14>;
523			dma-names = "rx", "tx";
524		};
525	};
526
527	rcar_sound,dai {
528		dai0 {
529			playback = <&ssi5 &src5>;
530			capture  = <&ssi6>;
531		};
532		dai1 {
533			playback = <&ssi3>;
534		};
535		dai2 {
536			capture  = <&ssi4>;
537		};
538		dai3 {
539			playback = <&ssi7>;
540		};
541		dai4 {
542			capture  = <&ssi8>;
543		};
544	};
545};
546
547=============================================
548Example: simple sound card
549=============================================
550
551	rsnd_ak4643: sound {
552		compatible = "simple-audio-card";
553
554		simple-audio-card,format = "left_j";
555		simple-audio-card,bitclock-master = <&sndcodec>;
556		simple-audio-card,frame-master = <&sndcodec>;
557
558		sndcpu: simple-audio-card,cpu {
559			sound-dai = <&rcar_sound>;
560		};
561
562		sndcodec: simple-audio-card,codec {
563			sound-dai = <&ak4643>;
564			clocks = <&audio_clock>;
565		};
566	};
567
568&rcar_sound {
569	pinctrl-0 = <&sound_pins &sound_clk_pins>;
570	pinctrl-names = "default";
571
572	/* Single DAI */
573	#sound-dai-cells = <0>;
574
575
576	rcar_sound,dai {
577		dai0 {
578			playback = <&ssi0 &src2 &dvc0>;
579			capture  = <&ssi1 &src3 &dvc1>;
580		};
581	};
582};
583
584&ssi1 {
585	shared-pin;
586};
587
588=============================================
589Example: simple sound card for Asynchronous mode
590=============================================
591
592sound {
593	compatible = "simple-scu-audio-card";
594	...
595	/*
596	 * SRC Asynchronous mode setting
597	 * Playback:
598	 * All input data will be converted to 48kHz
599	 * Capture:
600	 * Inputed 48kHz data will be converted to
601	 * system specified Hz
602	 */
603	simple-audio-card,convert-rate = <48000>;
604	...
605	simple-audio-card,cpu {
606		sound-dai = <&rcar_sound>;
607	};
608	simple-audio-card,codec {
609		...
610	};
611};
612
613=============================================
614Example: simple sound card for channel convert
615=============================================
616
617sound {
618	compatible = "simple-scu-audio-card";
619	...
620	/*
621	 * CTU setting
622	 * All input data will be converted to 2ch
623	 * as output data
624	 */
625	simple-audio-card,convert-channels = <2>;
626	...
627	simple-audio-card,cpu {
628		sound-dai = <&rcar_sound>;
629	};
630	simple-audio-card,codec {
631		...
632	};
633};
634
635=============================================
636Example: simple sound card for MIXer
637=============================================
638
639sound {
640	compatible = "simple-scu-audio-card";
641	...
642	simple-audio-card,cpu@0 {
643		sound-dai = <&rcar_sound 0>;
644	};
645	simple-audio-card,cpu@1 {
646		sound-dai = <&rcar_sound 1>;
647	};
648	simple-audio-card,codec {
649		...
650	};
651};
652
653&rcar_sound {
654	...
655	rcar_sound,dai {
656		dai0 {
657			playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
658		};
659		dai1 {
660			playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
661		};
662	};
663};
664
665=============================================
666Example: simple sound card for TDM
667=============================================
668
669rsnd_tdm: sound {
670	compatible = "simple-audio-card";
671
672	simple-audio-card,format = "left_j";
673	simple-audio-card,bitclock-master = <&sndcodec>;
674	simple-audio-card,frame-master = <&sndcodec>;
675
676	sndcpu: simple-audio-card,cpu {
677		sound-dai = <&rcar_sound>;
678		dai-tdm-slot-num = <6>;
679	};
680
681	sndcodec: simple-audio-card,codec {
682		sound-dai = <&xxx>;
683	};
684};
685
686=============================================
687Example: simple sound card for TDM Split
688=============================================
689
690sound_card: sound {
691	compatible = "audio-graph-scu-card";
692	prefix = "xxxx";
693	routing = "xxxx Playback", "DAI0 Playback",
694		  "xxxx Playback", "DAI1 Playback",
695		  "xxxx Playback", "DAI2 Playback",
696		  "xxxx Playback", "DAI3 Playback";
697	convert-channels = <8>; /* TDM Split */
698
699	dais = <&rsnd_port0     /* playback ch1/ch2 */
700		&rsnd_port1     /* playback ch3/ch4 */
701		&rsnd_port2     /* playback ch5/ch6 */
702		&rsnd_port3     /* playback ch7/ch8 */
703		>;
704};
705
706audio-codec {
707	...
708	port {
709		codec_0: endpoint@1 {
710			remote-endpoint = <&rsnd_ep0>;
711		};
712		codec_1: endpoint@2 {
713			remote-endpoint = <&rsnd_ep1>;
714		};
715		codec_2: endpoint@3 {
716			remote-endpoint = <&rsnd_ep2>;
717		};
718		codec_3: endpoint@4 {
719			remote-endpoint = <&rsnd_ep3>;
720		};
721	};
722};
723
724&rcar_sound {
725	...
726	ports {
727		rsnd_port0: port@0 {
728			rsnd_ep0: endpoint {
729				remote-endpoint = <&codec_0>;
730				...
731				playback = <&ssiu30 &ssi3>;
732			};
733		};
734		rsnd_port1: port@1 {
735			rsnd_ep1: endpoint {
736				remote-endpoint = <&codec_1>;
737				...
738				playback = <&ssiu31 &ssi3>;
739			};
740		};
741		rsnd_port2: port@2 {
742			rsnd_ep2: endpoint {
743				remote-endpoint = <&codec_2>;
744				...
745				playback = <&ssiu32 &ssi3>;
746			};
747		};
748		rsnd_port3: port@3 {
749			rsnd_ep3: endpoint {
750				remote-endpoint = <&codec_3>;
751				...
752				playback = <&ssiu33 &ssi3>;
753			};
754		};
755	};
756};
757
758=============================================
759Example: simple sound card for Multi channel
760=============================================
761
762&rcar_sound {
763	pinctrl-0 = <&sound_pins &sound_clk_pins>;
764	pinctrl-names = "default";
765
766	/* Single DAI */
767	#sound-dai-cells = <0>;
768
769
770	rcar_sound,dai {
771		dai0 {
772			playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
773		};
774	};
775};
776