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+Renesas R-Car sound
+
+=============================================
+* Modules
+=============================================
+
+Renesas R-Car and RZ/G sound is constructed from below modules
+(for Gen2 or later)
+
+ SCU : Sampling Rate Converter Unit
+ - SRC : Sampling Rate Converter
+ - CMD
+ - CTU : Channel Transfer Unit
+ - MIX : Mixer
+ - DVC : Digital Volume and Mute Function
+ SSIU : Serial Sound Interface Unit
+ SSI : Serial Sound Interface
+
+See detail of each module's channels, connection, limitation on datasheet
+
+=============================================
+* Multi channel
+=============================================
+
+Multi channel is supported by Multi-SSI, or TDM-SSI.
+
+ Multi-SSI : 6ch case, you can use stereo x 3 SSI
+ TDM-SSI : 6ch case, you can use TDM
+
+=============================================
+* Enable/Disable each modules
+=============================================
+
+See datasheet to check SRC/CTU/MIX/DVC connect-limitation.
+DT controls enabling/disabling module.
+${LINUX}/arch/arm/boot/dts/r8a7790-lager.dts can be good example.
+This is example of
+
+Playback: [MEM] -> [SRC2] -> [DVC0] -> [SSIU0/SSI0] -> [codec]
+Capture: [MEM] <- [DVC1] <- [SRC3] <- [SSIU1/SSI1] <- [codec]
+
+see "Example: simple sound card"
+
+You can use below.
+${LINUX}/arch/arm/boot/dts/r8a7790.dts can be good example.
+
+ &src0 &ctu00 &mix0 &dvc0 &ssi0
+ &src1 &ctu01 &mix1 &dvc1 &ssi1
+ &src2 &ctu02 &ssi2
+ &src3 &ctu03 &ssi3
+ &src4 &ssi4
+ &src5 &ctu10 &ssi5
+ &src6 &ctu11 &ssi6
+ &src7 &ctu12 &ssi7
+ &src8 &ctu13 &ssi8
+ &src9 &ssi9
+
+=============================================
+* SRC (Sampling Rate Converter)
+=============================================
+
+ [xx]Hz [yy]Hz
+ ------> [SRC] ------>
+
+SRC can convert [xx]Hz to [yy]Hz. Then, it has below 2 modes
+
+ Asynchronous mode: input data / output data are based on different clocks.
+ you can use this mode on Playback / Capture
+ Synchronous mode: input data / output data are based on same clocks.
+ This mode will be used if system doesn't have its input clock,
+ for example digital TV case.
+ you can use this mode on Playback
+
+------------------
+** Asynchronous mode
+------------------
+
+You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
+see "Example: simple sound card for Asynchronous mode"
+
+------------------
+** Synchronous mode
+------------------
+
+ > amixer set "SRC Out Rate" on
+ > aplay xxxx.wav
+ > amixer set "SRC Out Rate" 48000
+ > amixer set "SRC Out Rate" 44100
+
+=============================================
+* CTU (Channel Transfer Unit)
+=============================================
+
+ [xx]ch [yy]ch
+ ------> [CTU] -------->
+
+CTU can convert [xx]ch to [yy]ch, or exchange outputed channel.
+CTU conversion needs matrix settings.
+For more detail information, see below
+
+ Renesas R-Car datasheet
+ - Sampling Rate Converter Unit (SCU)
+ - SCU Operation
+ - CMD Block
+ - Functional Blocks in CMD
+
+ Renesas R-Car datasheet
+ - Sampling Rate Converter Unit (SCU)
+ - Register Description
+ - CTUn Scale Value exx Register (CTUn_SVxxR)
+
+ ${LINUX}/sound/soc/sh/rcar/ctu.c
+ - comment of header
+
+You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
+see "Example: simple sound card for channel convert"
+
+Ex) Exchange output channel
+ Input -> Output
+ 1ch -> 0ch
+ 0ch -> 1ch
+
+ example of using matrix
+ output 0ch = (input 0ch x 0) + (input 1ch x 1)
+ output 1ch = (input 0ch x 1) + (input 1ch x 0)
+
+ amixer set "CTU Reset" on
+ amixer set "CTU Pass" 9,10
+ amixer set "CTU SV0" 0,4194304
+ amixer set "CTU SV1" 4194304,0
+
+ example of changing connection
+ amixer set "CTU Reset" on
+ amixer set "CTU Pass" 2,1
+
+=============================================
+* MIX (Mixer)
+=============================================
+
+MIX merges 2 sounds path. You can see 2 sound interface on system,
+and these sounds will be merged by MIX.
+
+ aplay -D plughw:0,0 xxxx.wav &
+ aplay -D plughw:0,1 yyyy.wav
+
+You need to use "simple-scu-audio-card" or "audio-graph-scu-card" for it.
+Ex)
+ [MEM] -> [SRC1] -> [CTU02] -+-> [MIX0] -> [DVC0] -> [SSI0]
+ |
+ [MEM] -> [SRC2] -> [CTU03] -+
+
+see "Example: simple sound card for MIXer"
+
+=============================================
+* DVC (Digital Volume and Mute Function)
+=============================================
+
+DVC controls Playback/Capture volume.
+
+Playback Volume
+ amixer set "DVC Out" 100%
+
+Capture Volume
+ amixer set "DVC In" 100%
+
+Playback Mute
+ amixer set "DVC Out Mute" on
+
+Capture Mute
+ amixer set "DVC In Mute" on
+
+Volume Ramp
+ amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
+ amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
+ amixer set "DVC Out Ramp" on
+ aplay xxx.wav &
+ amixer set "DVC Out" 80% // Volume Down
+ amixer set "DVC Out" 100% // Volume Up
+
+=============================================
+* SSIU (Serial Sound Interface Unit)
+=============================================
+
+SSIU can avoid some under/over run error, because it has some buffer.
+But you can't use it if SSI was PIO mode.
+In DMA mode, you can select not to use SSIU by using "no-busif" via SSI.
+
+SSIU handles BUSIF which will be used for TDM Split mode.
+This driver is assuming that audio-graph card will be used.
+
+TDM Split mode merges 4 sounds. You can see 4 sound interface on system,
+and these sounds will be merged SSIU/SSI.
+
+ aplay -D plughw:0,0 xxxx.wav &
+ aplay -D plughw:0,1 xxxx.wav &
+ aplay -D plughw:0,2 xxxx.wav &
+ aplay -D plughw:0,3 xxxx.wav
+
+ 2ch 8ch
+ [MEM] -> [SSIU 30] -+-> [SSIU 3] --> [Codec]
+ 2ch |
+ [MEM] -> [SSIU 31] -+
+ 2ch |
+ [MEM] -> [SSIU 32] -+
+ 2ch |
+ [MEM] -> [SSIU 33] -+
+
+see "Example: simple sound card for TDM Split"
+
+=============================================
+* SSI (Serial Sound Interface)
+=============================================
+
+** PIO mode
+
+You can use PIO mode which is for connection check by using.
+Note: The system will drop non-SSI modules in PIO mode
+even though if DT is selecting other modules.
+
+ &ssi0 {
+ pio-transfer
+ };
+
+** DMA mode without SSIU
+
+You can use DMA without SSIU.
+Note: under/over run, or noise are likely to occur
+
+ &ssi0 {
+ no-busif;
+ };
+
+** PIN sharing
+
+Each SSI can share WS pin. It is based on platform.
+This is example if SSI1 want to share WS pin with SSI0
+
+ &ssi1 {
+ shared-pin;
+ };
+
+** Multi-SSI
+
+You can use Multi-SSI.
+This is example of SSI0/SSI1/SSI2 (= for 6ch)
+
+see "Example: simple sound card for Multi channel"
+
+** TDM-SSI
+
+You can use TDM with SSI.
+This is example of TDM 6ch.
+Driver can automatically switches TDM <-> stereo mode in this case.
+
+see "Example: simple sound card for TDM"
+
+=============================================
+Required properties:
+=============================================
+
+- compatible : "renesas,rcar_sound-<soctype>", fallbacks
+ "renesas,rcar_sound-gen1" if generation1, and
+ "renesas,rcar_sound-gen2" if generation2 (or RZ/G1)
+ "renesas,rcar_sound-gen3" if generation3 (or RZ/G2)
+ Examples with soctypes are:
+ - "renesas,rcar_sound-r8a7742" (RZ/G1H)
+ - "renesas,rcar_sound-r8a7743" (RZ/G1M)
+ - "renesas,rcar_sound-r8a7744" (RZ/G1N)
+ - "renesas,rcar_sound-r8a7745" (RZ/G1E)
+ - "renesas,rcar_sound-r8a77470" (RZ/G1C)
+ - "renesas,rcar_sound-r8a774a1" (RZ/G2M)
+ - "renesas,rcar_sound-r8a774b1" (RZ/G2N)
+ - "renesas,rcar_sound-r8a774c0" (RZ/G2E)
+ - "renesas,rcar_sound-r8a774e1" (RZ/G2H)
+ - "renesas,rcar_sound-r8a7778" (R-Car M1A)
+ - "renesas,rcar_sound-r8a7779" (R-Car H1)
+ - "renesas,rcar_sound-r8a7790" (R-Car H2)
+ - "renesas,rcar_sound-r8a7791" (R-Car M2-W)
+ - "renesas,rcar_sound-r8a7793" (R-Car M2-N)
+ - "renesas,rcar_sound-r8a7794" (R-Car E2)
+ - "renesas,rcar_sound-r8a7795" (R-Car H3)
+ - "renesas,rcar_sound-r8a7796" (R-Car M3-W)
+ - "renesas,rcar_sound-r8a77965" (R-Car M3-N)
+ - "renesas,rcar_sound-r8a77990" (R-Car E3)
+ - "renesas,rcar_sound-r8a77995" (R-Car D3)
+- reg : Should contain the register physical address.
+ required register is
+ SRU/ADG/SSI if generation1
+ SRU/ADG/SSIU/SSI/AUDIO-DMAC-periperi if generation2/generation3
+ Select extended AUDIO-DMAC-periperi address if SoC has it,
+ otherwise select normal AUDIO-DMAC-periperi address.
+- reg-names : Should contain the register names.
+ scu/adg/ssi if generation1
+ scu/adg/ssiu/ssi/audmapp if generation2/generation3
+- rcar_sound,ssi : Should contain SSI feature.
+ The number of SSI subnode should be same as HW.
+ see below for detail.
+- rcar_sound,ssiu : Should contain SSIU feature.
+ The number of SSIU subnode should be same as HW.
+ see below for detail.
+- rcar_sound,src : Should contain SRC feature.
+ The number of SRC subnode should be same as HW.
+ see below for detail.
+- rcar_sound,ctu : Should contain CTU feature.
+ The number of CTU subnode should be same as HW.
+ see below for detail.
+- rcar_sound,mix : Should contain MIX feature.
+ The number of MIX subnode should be same as HW.
+ see below for detail.
+- rcar_sound,dvc : Should contain DVC feature.
+ The number of DVC subnode should be same as HW.
+ see below for detail.
+- rcar_sound,dai : DAI contents.
+ The number of DAI subnode should be same as HW.
+ see below for detail.
+- #sound-dai-cells : it must be 0 if your system is using single DAI
+ it must be 1 if your system is using multi DAI
+- clocks : References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
+- clock-names : List of necessary clock names.
+ "ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
+ "dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
+
+Optional properties:
+- #clock-cells : it must be 0 if your system has audio_clkout
+ it must be 1 if your system has audio_clkout0/1/2/3
+- clock-frequency : for all audio_clkout0/1/2/3
+- clkout-lr-asynchronous : boolean property. it indicates that audio_clkoutn
+ is asynchronizes with lr-clock.
+- resets : References to SSI resets.
+- reset-names : List of valid reset names.
+ "ssi-all", "ssi.X"
+
+SSI subnode properties:
+- interrupts : Should contain SSI interrupt for PIO transfer
+- shared-pin : if shared clock pin
+- pio-transfer : use PIO transfer mode
+- no-busif : BUSIF is not ussed when [mem -> SSI] via DMA case
+- dma : Should contain Audio DMAC entry
+- dma-names : SSI case "rx" (=playback), "tx" (=capture)
+ Deprecated: see SSIU subnode properties
+ SSIU case "rxu" (=playback), "txu" (=capture)
+
+SSIU subnode properties:
+- dma : Should contain Audio DMAC entry
+- dma-names : "rx" (=playback), "tx" (=capture)
+
+SRC subnode properties:
+- dma : Should contain Audio DMAC entry
+- dma-names : "rx" (=playback), "tx" (=capture)
+
+DVC subnode properties:
+- dma : Should contain Audio DMAC entry
+- dma-names : "tx" (=playback/capture)
+
+DAI subnode properties:
+- playback : list of playback modules
+- capture : list of capture modules
+
+
+=============================================
+Example:
+=============================================
+
+rcar_sound: sound@ec500000 {
+ #sound-dai-cells = <1>;
+ compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
+ reg = <0 0xec500000 0 0x1000>, /* SCU */
+ <0 0xec5a0000 0 0x100>, /* ADG */
+ <0 0xec540000 0 0x1000>, /* SSIU */
+ <0 0xec541000 0 0x1280>, /* SSI */
+ <0 0xec740000 0 0x200>; /* Audio DMAC peri peri*/
+ reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
+
+ clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
+ <&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
+ <&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
+ <&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
+ <&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
+ <&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
+ <&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
+ <&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
+ <&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
+ <&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
+ <&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
+ <&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
+ <&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
+ clock-names = "ssi-all",
+ "ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
+ "ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
+ "src.9", "src.8", "src.7", "src.6", "src.5",
+ "src.4", "src.3", "src.2", "src.1", "src.0",
+ "dvc.0", "dvc.1",
+ "clk_a", "clk_b", "clk_c", "clk_i";
+
+ rcar_sound,dvc {
+ dvc0: dvc-0 {
+ dmas = <&audma0 0xbc>;
+ dma-names = "tx";
+ };
+ dvc1: dvc-1 {
+ dmas = <&audma0 0xbe>;
+ dma-names = "tx";
+ };
+ };
+
+ rcar_sound,mix {
+ mix0: mix-0 { };
+ mix1: mix-1 { };
+ };
+
+ rcar_sound,ctu {
+ ctu00: ctu-0 { };
+ ctu01: ctu-1 { };
+ ctu02: ctu-2 { };
+ ctu03: ctu-3 { };
+ ctu10: ctu-4 { };
+ ctu11: ctu-5 { };
+ ctu12: ctu-6 { };
+ ctu13: ctu-7 { };
+ };
+
+ rcar_sound,src {
+ src0: src-0 {
+ interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x85>, <&audma1 0x9a>;
+ dma-names = "rx", "tx";
+ };
+ src1: src-1 {
+ interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x87>, <&audma1 0x9c>;
+ dma-names = "rx", "tx";
+ };
+ src2: src-2 {
+ interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x89>, <&audma1 0x9e>;
+ dma-names = "rx", "tx";
+ };
+ src3: src-3 {
+ interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8b>, <&audma1 0xa0>;
+ dma-names = "rx", "tx";
+ };
+ src4: src-4 {
+ interrupts = <0 356 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8d>, <&audma1 0xb0>;
+ dma-names = "rx", "tx";
+ };
+ src5: src-5 {
+ interrupts = <0 357 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x8f>, <&audma1 0xb2>;
+ dma-names = "rx", "tx";
+ };
+ src6: src-6 {
+ interrupts = <0 358 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x91>, <&audma1 0xb4>;
+ dma-names = "rx", "tx";
+ };
+ src7: src-7 {
+ interrupts = <0 359 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x93>, <&audma1 0xb6>;
+ dma-names = "rx", "tx";
+ };
+ src8: src-8 {
+ interrupts = <0 360 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x95>, <&audma1 0xb8>;
+ dma-names = "rx", "tx";
+ };
+ src9: src-9 {
+ interrupts = <0 361 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x97>, <&audma1 0xba>;
+ dma-names = "rx", "tx";
+ };
+ };
+
+ rcar_sound,ssiu {
+ ssiu00: ssiu-0 {
+ dmas = <&audma0 0x15>, <&audma1 0x16>;
+ dma-names = "rx", "tx";
+ };
+ ssiu01: ssiu-1 {
+ dmas = <&audma0 0x35>, <&audma1 0x36>;
+ dma-names = "rx", "tx";
+ };
+
+ ...
+
+ ssiu95: ssiu-49 {
+ dmas = <&audma0 0xA5>, <&audma1 0xA6>;
+ dma-names = "rx", "tx";
+ };
+ ssiu96: ssiu-50 {
+ dmas = <&audma0 0xA7>, <&audma1 0xA8>;
+ dma-names = "rx", "tx";
+ };
+ ssiu97: ssiu-51 {
+ dmas = <&audma0 0xA9>, <&audma1 0xAA>;
+ dma-names = "rx", "tx";
+ };
+ };
+
+ rcar_sound,ssi {
+ ssi0: ssi-0 {
+ interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x01>, <&audma1 0x02>;
+ dma-names = "rx", "tx";
+ };
+ ssi1: ssi-1 {
+ interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x03>, <&audma1 0x04>;
+ dma-names = "rx", "tx";
+ };
+
+ ...
+
+ ssi8: ssi-8 {
+ interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x11>, <&audma1 0x12>;
+ dma-names = "rx", "tx";
+ };
+ ssi9: ssi-9 {
+ interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
+ dmas = <&audma0 0x13>, <&audma1 0x14>;
+ dma-names = "rx", "tx";
+ };
+ };
+
+ rcar_sound,dai {
+ dai0 {
+ playback = <&ssi5 &src5>;
+ capture = <&ssi6>;
+ };
+ dai1 {
+ playback = <&ssi3>;
+ };
+ dai2 {
+ capture = <&ssi4>;
+ };
+ dai3 {
+ playback = <&ssi7>;
+ };
+ dai4 {
+ capture = <&ssi8>;
+ };
+ };
+};
+
+=============================================
+Example: simple sound card
+=============================================
+
+ rsnd_ak4643: sound {
+ compatible = "simple-audio-card";
+
+ simple-audio-card,format = "left_j";
+ simple-audio-card,bitclock-master = <&sndcodec>;
+ simple-audio-card,frame-master = <&sndcodec>;
+
+ sndcpu: simple-audio-card,cpu {
+ sound-dai = <&rcar_sound>;
+ };
+
+ sndcodec: simple-audio-card,codec {
+ sound-dai = <&ak4643>;
+ clocks = <&audio_clock>;
+ };
+ };
+
+&rcar_sound {
+ pinctrl-0 = <&sound_pins &sound_clk_pins>;
+ pinctrl-names = "default";
+
+ /* Single DAI */
+ #sound-dai-cells = <0>;
+
+
+ rcar_sound,dai {
+ dai0 {
+ playback = <&ssi0 &src2 &dvc0>;
+ capture = <&ssi1 &src3 &dvc1>;
+ };
+ };
+};
+
+&ssi1 {
+ shared-pin;
+};
+
+=============================================
+Example: simple sound card for Asynchronous mode
+=============================================
+
+sound {
+ compatible = "simple-scu-audio-card";
+ ...
+ /*
+ * SRC Asynchronous mode setting
+ * Playback:
+ * All input data will be converted to 48kHz
+ * Capture:
+ * Inputed 48kHz data will be converted to
+ * system specified Hz
+ */
+ simple-audio-card,convert-rate = <48000>;
+ ...
+ simple-audio-card,cpu {
+ sound-dai = <&rcar_sound>;
+ };
+ simple-audio-card,codec {
+ ...
+ };
+};
+
+=============================================
+Example: simple sound card for channel convert
+=============================================
+
+sound {
+ compatible = "simple-scu-audio-card";
+ ...
+ /*
+ * CTU setting
+ * All input data will be converted to 2ch
+ * as output data
+ */
+ simple-audio-card,convert-channels = <2>;
+ ...
+ simple-audio-card,cpu {
+ sound-dai = <&rcar_sound>;
+ };
+ simple-audio-card,codec {
+ ...
+ };
+};
+
+=============================================
+Example: simple sound card for MIXer
+=============================================
+
+sound {
+ compatible = "simple-scu-audio-card";
+ ...
+ simple-audio-card,cpu@0 {
+ sound-dai = <&rcar_sound 0>;
+ };
+ simple-audio-card,cpu@1 {
+ sound-dai = <&rcar_sound 1>;
+ };
+ simple-audio-card,codec {
+ ...
+ };
+};
+
+&rcar_sound {
+ ...
+ rcar_sound,dai {
+ dai0 {
+ playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
+ };
+ dai1 {
+ playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
+ };
+ };
+};
+
+=============================================
+Example: simple sound card for TDM
+=============================================
+
+rsnd_tdm: sound {
+ compatible = "simple-audio-card";
+
+ simple-audio-card,format = "left_j";
+ simple-audio-card,bitclock-master = <&sndcodec>;
+ simple-audio-card,frame-master = <&sndcodec>;
+
+ sndcpu: simple-audio-card,cpu {
+ sound-dai = <&rcar_sound>;
+ dai-tdm-slot-num = <6>;
+ };
+
+ sndcodec: simple-audio-card,codec {
+ sound-dai = <&xxx>;
+ };
+};
+
+=============================================
+Example: simple sound card for TDM Split
+=============================================
+
+sound_card: sound {
+ compatible = "audio-graph-scu-card";
+ prefix = "xxxx";
+ routing = "xxxx Playback", "DAI0 Playback",
+ "xxxx Playback", "DAI1 Playback",
+ "xxxx Playback", "DAI2 Playback",
+ "xxxx Playback", "DAI3 Playback";
+ convert-channels = <8>; /* TDM Split */
+
+ dais = <&rsnd_port0 /* playback ch1/ch2 */
+ &rsnd_port1 /* playback ch3/ch4 */
+ &rsnd_port2 /* playback ch5/ch6 */
+ &rsnd_port3 /* playback ch7/ch8 */
+ >;
+};
+
+audio-codec {
+ ...
+ port {
+ codec_0: endpoint@1 {
+ remote-endpoint = <&rsnd_ep0>;
+ };
+ codec_1: endpoint@2 {
+ remote-endpoint = <&rsnd_ep1>;
+ };
+ codec_2: endpoint@3 {
+ remote-endpoint = <&rsnd_ep2>;
+ };
+ codec_3: endpoint@4 {
+ remote-endpoint = <&rsnd_ep3>;
+ };
+ };
+};
+
+&rcar_sound {
+ ...
+ ports {
+ rsnd_port0: port@0 {
+ rsnd_ep0: endpoint {
+ remote-endpoint = <&codec_0>;
+ ...
+ playback = <&ssiu30 &ssi3>;
+ };
+ };
+ rsnd_port1: port@1 {
+ rsnd_ep1: endpoint {
+ remote-endpoint = <&codec_1>;
+ ...
+ playback = <&ssiu31 &ssi3>;
+ };
+ };
+ rsnd_port2: port@2 {
+ rsnd_ep2: endpoint {
+ remote-endpoint = <&codec_2>;
+ ...
+ playback = <&ssiu32 &ssi3>;
+ };
+ };
+ rsnd_port3: port@3 {
+ rsnd_ep3: endpoint {
+ remote-endpoint = <&codec_3>;
+ ...
+ playback = <&ssiu33 &ssi3>;
+ };
+ };
+ };
+};
+
+=============================================
+Example: simple sound card for Multi channel
+=============================================
+
+&rcar_sound {
+ pinctrl-0 = <&sound_pins &sound_clk_pins>;
+ pinctrl-names = "default";
+
+ /* Single DAI */
+ #sound-dai-cells = <0>;
+
+
+ rcar_sound,dai {
+ dai0 {
+ playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
+ };
+ };
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 05:48:40 +0000