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Document the optional properties for describing module resets, to support resetting these modules on R-Car Gen2 and Gen3. Note that the audio module has resets for the Serial Sound Interfaces only. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
678 lines
17 KiB
Plaintext
678 lines
17 KiB
Plaintext
Renesas R-Car sound
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=============================================
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* Modules
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=============================================
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Renesas R-Car sound is constructed from below modules
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(for Gen2 or later)
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SCU : Sampling Rate Converter Unit
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- SRC : Sampling Rate Converter
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- CMD
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- CTU : Channel Transfer Unit
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- MIX : Mixer
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- DVC : Digital Volume and Mute Function
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SSIU : Serial Sound Interface Unit
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SSI : Serial Sound Interface
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See detail of each module's channels, connection, limitation on datasheet
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=============================================
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* Multi channel
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=============================================
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Multi channel is supported by Multi-SSI, or TDM-SSI.
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Multi-SSI : 6ch case, you can use stereo x 3 SSI
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TDM-SSI : 6ch case, you can use TDM
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=============================================
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* Enable/Disable each modules
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=============================================
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See datasheet to check SRC/CTU/MIX/DVC connect-limitation.
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DT controls enabling/disabling module.
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${LINUX}/arch/arm/boot/dts/r8a7790-lager.dts can be good example.
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This is example of
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Playback: [MEM] -> [SRC2] -> [DVC0] -> [SSIU0/SSI0] -> [codec]
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Capture: [MEM] <- [DVC1] <- [SRC3] <- [SSIU1/SSI1] <- [codec]
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&rcar_sound {
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...
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rcar_sound,dai {
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dai0 {
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playback = <&ssi0 &src2 &dvc0>;
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capture = <&ssi1 &src3 &dvc1>;
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};
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};
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};
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You can use below.
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${LINUX}/arch/arm/boot/dts/r8a7790.dts can be good example.
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&src0 &ctu00 &mix0 &dvc0 &ssi0
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&src1 &ctu01 &mix1 &dvc1 &ssi1
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&src2 &ctu02 &ssi2
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&src3 &ctu03 &ssi3
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&src4 &ssi4
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&src5 &ctu10 &ssi5
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&src6 &ctu11 &ssi6
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&src7 &ctu12 &ssi7
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&src8 &ctu13 &ssi8
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&src9 &ssi9
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=============================================
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* SRC (Sampling Rate Converter)
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=============================================
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[xx]Hz [yy]Hz
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------> [SRC] ------>
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SRC can convert [xx]Hz to [yy]Hz. Then, it has below 2 modes
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Asynchronous mode: input data / output data are based on different clocks.
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you can use this mode on Playback / Capture
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Synchronous mode: input data / output data are based on same clocks.
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This mode will be used if system doesn't have its input clock,
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for example digital TV case.
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you can use this mode on Playback
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------------------
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** Asynchronous mode
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------------------
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You need to use "simple-scu-audio-card" sound card for it.
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example)
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sound {
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compatible = "simple-scu-audio-card";
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...
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/*
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* SRC Asynchronous mode setting
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* Playback:
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* All input data will be converted to 48kHz
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* Capture:
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* Inputed 48kHz data will be converted to
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* system specified Hz
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*/
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simple-audio-card,convert-rate = <48000>;
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...
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simple-audio-card,cpu {
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sound-dai = <&rcar_sound>;
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};
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simple-audio-card,codec {
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...
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};
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};
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------------------
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** Synchronous mode
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------------------
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> amixer set "SRC Out Rate" on
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> aplay xxxx.wav
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> amixer set "SRC Out Rate" 48000
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> amixer set "SRC Out Rate" 44100
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=============================================
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* CTU (Channel Transfer Unit)
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=============================================
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[xx]ch [yy]ch
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------> [CTU] -------->
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CTU can convert [xx]ch to [yy]ch, or exchange outputed channel.
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CTU conversion needs matrix settings.
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For more detail information, see below
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Renesas R-Car datasheet
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- Sampling Rate Converter Unit (SCU)
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- SCU Operation
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- CMD Block
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- Functional Blocks in CMD
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Renesas R-Car datasheet
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- Sampling Rate Converter Unit (SCU)
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- Register Description
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- CTUn Scale Value exx Register (CTUn_SVxxR)
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${LINUX}/sound/soc/sh/rcar/ctu.c
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- comment of header
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You need to use "simple-scu-audio-card" sound card for it.
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example)
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sound {
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compatible = "simple-scu-audio-card";
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...
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/*
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* CTU setting
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* All input data will be converted to 2ch
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* as output data
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*/
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simple-audio-card,convert-channels = <2>;
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...
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simple-audio-card,cpu {
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sound-dai = <&rcar_sound>;
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};
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simple-audio-card,codec {
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...
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};
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};
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Ex) Exchange output channel
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Input -> Output
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1ch -> 0ch
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0ch -> 1ch
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example of using matrix
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output 0ch = (input 0ch x 0) + (input 1ch x 1)
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output 1ch = (input 0ch x 1) + (input 1ch x 0)
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amixer set "CTU Reset" on
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amixer set "CTU Pass" 9,10
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amixer set "CTU SV0" 0,4194304
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amixer set "CTU SV1" 4194304,0
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example of changing connection
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amixer set "CTU Reset" on
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amixer set "CTU Pass" 2,1
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=============================================
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* MIX (Mixer)
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=============================================
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MIX merges 2 sounds path. You can see 2 sound interface on system,
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and these sounds will be merged by MIX.
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aplay -D plughw:0,0 xxxx.wav &
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aplay -D plughw:0,1 yyyy.wav
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You need to use "simple-scu-audio-card" sound card for it.
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Ex)
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[MEM] -> [SRC1] -> [CTU02] -+-> [MIX0] -> [DVC0] -> [SSI0]
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[MEM] -> [SRC2] -> [CTU03] -+
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sound {
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compatible = "simple-scu-audio-card";
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...
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simple-audio-card,cpu@0 {
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sound-dai = <&rcar_sound 0>;
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};
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simple-audio-card,cpu@1 {
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sound-dai = <&rcar_sound 1>;
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};
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simple-audio-card,codec {
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...
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};
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};
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&rcar_sound {
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...
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rcar_sound,dai {
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dai0 {
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playback = <&src1 &ctu02 &mix0 &dvc0 &ssi0>;
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};
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dai1 {
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playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;
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};
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};
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};
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=============================================
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* DVC (Digital Volume and Mute Function)
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=============================================
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DVC controls Playback/Capture volume.
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Playback Volume
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amixer set "DVC Out" 100%
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Capture Volume
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amixer set "DVC In" 100%
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Playback Mute
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amixer set "DVC Out Mute" on
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Capture Mute
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amixer set "DVC In Mute" on
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Volume Ramp
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amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
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amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
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amixer set "DVC Out Ramp" on
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aplay xxx.wav &
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amixer set "DVC Out" 80% // Volume Down
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amixer set "DVC Out" 100% // Volume Up
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=============================================
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* SSIU (Serial Sound Interface Unit)
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=============================================
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There is no DT settings for SSIU, because SSIU will be automatically
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selected via SSI.
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SSIU can avoid some under/over run error, because it has some buffer.
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But you can't use it if SSI was PIO mode.
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In DMA mode, you can select not to use SSIU by using "no-busif" on DT.
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&ssi0 {
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no-busif;
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};
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=============================================
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* SSI (Serial Sound Interface)
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=============================================
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** PIO mode
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You can use PIO mode which is for connection check by using.
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Note: The system will drop non-SSI modules in PIO mode
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even though if DT is selecting other modules.
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&ssi0 {
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pio-transfer
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};
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** DMA mode without SSIU
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You can use DMA without SSIU.
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Note: under/over run, or noise are likely to occur
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&ssi0 {
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no-busif;
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};
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** PIN sharing
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Each SSI can share WS pin. It is based on platform.
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This is example if SSI1 want to share WS pin with SSI0
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&ssi1 {
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shared-pin;
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};
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** Multi-SSI
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You can use Multi-SSI.
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This is example of SSI0/SSI1/SSI2 (= for 6ch)
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&rcar_sound {
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...
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rcar_sound,dai {
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dai0 {
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playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
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};
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};
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};
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** TDM-SSI
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You can use TDM with SSI.
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This is example of TDM 6ch.
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Driver can automatically switches TDM <-> stereo mode in this case.
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rsnd_tdm: sound {
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compatible = "simple-audio-card";
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...
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simple-audio-card,cpu {
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/* system can use TDM 6ch */
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dai-tdm-slot-num = <6>;
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sound-dai = <&rcar_sound>;
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};
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simple-audio-card,codec {
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...
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};
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};
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=============================================
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Required properties:
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=============================================
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- compatible : "renesas,rcar_sound-<soctype>", fallbacks
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"renesas,rcar_sound-gen1" if generation1, and
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"renesas,rcar_sound-gen2" if generation2
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"renesas,rcar_sound-gen3" if generation3
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Examples with soctypes are:
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- "renesas,rcar_sound-r8a7778" (R-Car M1A)
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- "renesas,rcar_sound-r8a7779" (R-Car H1)
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- "renesas,rcar_sound-r8a7790" (R-Car H2)
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- "renesas,rcar_sound-r8a7791" (R-Car M2-W)
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- "renesas,rcar_sound-r8a7793" (R-Car M2-N)
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- "renesas,rcar_sound-r8a7794" (R-Car E2)
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- "renesas,rcar_sound-r8a7795" (R-Car H3)
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- reg : Should contain the register physical address.
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required register is
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SRU/ADG/SSI if generation1
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SRU/ADG/SSIU/SSI if generation2
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- rcar_sound,ssi : Should contain SSI feature.
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The number of SSI subnode should be same as HW.
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see below for detail.
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- rcar_sound,src : Should contain SRC feature.
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The number of SRC subnode should be same as HW.
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see below for detail.
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- rcar_sound,ctu : Should contain CTU feature.
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The number of CTU subnode should be same as HW.
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see below for detail.
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- rcar_sound,mix : Should contain MIX feature.
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The number of MIX subnode should be same as HW.
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see below for detail.
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- rcar_sound,dvc : Should contain DVC feature.
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The number of DVC subnode should be same as HW.
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see below for detail.
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- rcar_sound,dai : DAI contents.
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The number of DAI subnode should be same as HW.
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see below for detail.
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- #sound-dai-cells : it must be 0 if your system is using single DAI
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it must be 1 if your system is using multi DAI
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- clocks : References to SSI/SRC/MIX/CTU/DVC/AUDIO_CLK clocks.
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- clock-names : List of necessary clock names.
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"ssi-all", "ssi.X", "src.X", "mix.X", "ctu.X",
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"dvc.X", "clk_a", "clk_b", "clk_c", "clk_i"
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Optional properties:
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- #clock-cells : it must be 0 if your system has audio_clkout
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it must be 1 if your system has audio_clkout0/1/2/3
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- clock-frequency : for all audio_clkout0/1/2/3
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- clkout-lr-asynchronous : boolean property. it indicates that audio_clkoutn
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is asynchronizes with lr-clock.
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- resets : References to SSI resets.
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- reset-names : List of valid reset names.
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"ssi-all", "ssi.X"
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SSI subnode properties:
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- interrupts : Should contain SSI interrupt for PIO transfer
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- shared-pin : if shared clock pin
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- pio-transfer : use PIO transfer mode
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- no-busif : BUSIF is not ussed when [mem -> SSI] via DMA case
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- dma : Should contain Audio DMAC entry
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- dma-names : SSI case "rx" (=playback), "tx" (=capture)
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SSIU case "rxu" (=playback), "txu" (=capture)
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SRC subnode properties:
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- dma : Should contain Audio DMAC entry
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- dma-names : "rx" (=playback), "tx" (=capture)
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DVC subnode properties:
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- dma : Should contain Audio DMAC entry
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- dma-names : "tx" (=playback/capture)
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DAI subnode properties:
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- playback : list of playback modules
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- capture : list of capture modules
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=============================================
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Example:
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=============================================
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rcar_sound: sound@ec500000 {
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#sound-dai-cells = <1>;
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compatible = "renesas,rcar_sound-r8a7791", "renesas,rcar_sound-gen2";
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reg = <0 0xec500000 0 0x1000>, /* SCU */
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<0 0xec5a0000 0 0x100>, /* ADG */
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<0 0xec540000 0 0x1000>, /* SSIU */
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<0 0xec541000 0 0x1280>, /* SSI */
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<0 0xec740000 0 0x200>; /* Audio DMAC peri peri*/
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reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";
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clocks = <&mstp10_clks R8A7790_CLK_SSI_ALL>,
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<&mstp10_clks R8A7790_CLK_SSI9>, <&mstp10_clks R8A7790_CLK_SSI8>,
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<&mstp10_clks R8A7790_CLK_SSI7>, <&mstp10_clks R8A7790_CLK_SSI6>,
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<&mstp10_clks R8A7790_CLK_SSI5>, <&mstp10_clks R8A7790_CLK_SSI4>,
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<&mstp10_clks R8A7790_CLK_SSI3>, <&mstp10_clks R8A7790_CLK_SSI2>,
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<&mstp10_clks R8A7790_CLK_SSI1>, <&mstp10_clks R8A7790_CLK_SSI0>,
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<&mstp10_clks R8A7790_CLK_SCU_SRC9>, <&mstp10_clks R8A7790_CLK_SCU_SRC8>,
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<&mstp10_clks R8A7790_CLK_SCU_SRC7>, <&mstp10_clks R8A7790_CLK_SCU_SRC6>,
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<&mstp10_clks R8A7790_CLK_SCU_SRC5>, <&mstp10_clks R8A7790_CLK_SCU_SRC4>,
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<&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
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<&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
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<&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
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<&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
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clock-names = "ssi-all",
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"ssi.9", "ssi.8", "ssi.7", "ssi.6", "ssi.5",
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"ssi.4", "ssi.3", "ssi.2", "ssi.1", "ssi.0",
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"src.9", "src.8", "src.7", "src.6", "src.5",
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"src.4", "src.3", "src.2", "src.1", "src.0",
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"dvc.0", "dvc.1",
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"clk_a", "clk_b", "clk_c", "clk_i";
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rcar_sound,dvc {
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dvc0: dvc@0 {
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dmas = <&audma0 0xbc>;
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dma-names = "tx";
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};
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dvc1: dvc@1 {
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dmas = <&audma0 0xbe>;
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dma-names = "tx";
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};
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};
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rcar_sound,mix {
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mix0: mix@0 { };
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mix1: mix@1 { };
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};
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rcar_sound,ctu {
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ctu00: ctu@0 { };
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ctu01: ctu@1 { };
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ctu02: ctu@2 { };
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ctu03: ctu@3 { };
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ctu10: ctu@4 { };
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ctu11: ctu@5 { };
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ctu12: ctu@6 { };
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ctu13: ctu@7 { };
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};
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rcar_sound,src {
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src0: src@0 {
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interrupts = <0 352 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&audma0 0x85>, <&audma1 0x9a>;
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dma-names = "rx", "tx";
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};
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src1: src@1 {
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interrupts = <0 353 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&audma0 0x87>, <&audma1 0x9c>;
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dma-names = "rx", "tx";
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};
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src2: src@2 {
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interrupts = <0 354 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&audma0 0x89>, <&audma1 0x9e>;
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dma-names = "rx", "tx";
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};
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src3: src@3 {
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interrupts = <0 355 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&audma0 0x8b>, <&audma1 0xa0>;
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|
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,ssi {
|
|
ssi0: ssi@0 {
|
|
interrupts = <0 370 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x01>, <&audma1 0x02>, <&audma0 0x15>, <&audma1 0x16>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi1: ssi@1 {
|
|
interrupts = <0 371 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x03>, <&audma1 0x04>, <&audma0 0x49>, <&audma1 0x4a>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi2: ssi@2 {
|
|
interrupts = <0 372 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x05>, <&audma1 0x06>, <&audma0 0x63>, <&audma1 0x64>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi3: ssi@3 {
|
|
interrupts = <0 373 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x07>, <&audma1 0x08>, <&audma0 0x6f>, <&audma1 0x70>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi4: ssi@4 {
|
|
interrupts = <0 374 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x09>, <&audma1 0x0a>, <&audma0 0x71>, <&audma1 0x72>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi5: ssi@5 {
|
|
interrupts = <0 375 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x0b>, <&audma1 0x0c>, <&audma0 0x73>, <&audma1 0x74>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi6: ssi@6 {
|
|
interrupts = <0 376 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x0d>, <&audma1 0x0e>, <&audma0 0x75>, <&audma1 0x76>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi7: ssi@7 {
|
|
interrupts = <0 377 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x0f>, <&audma1 0x10>, <&audma0 0x79>, <&audma1 0x7a>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi8: ssi@8 {
|
|
interrupts = <0 378 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x11>, <&audma1 0x12>, <&audma0 0x7b>, <&audma1 0x7c>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
ssi9: ssi@9 {
|
|
interrupts = <0 379 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&audma0 0x13>, <&audma1 0x14>, <&audma0 0x7d>, <&audma1 0x7e>;
|
|
dma-names = "rx", "tx", "rxu", "txu";
|
|
};
|
|
};
|
|
|
|
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>;
|
|
|
|
status = "okay";
|
|
|
|
rcar_sound,dai {
|
|
dai0 {
|
|
playback = <&ssi0 &src2 &dvc0>;
|
|
capture = <&ssi1 &src3 &dvc1>;
|
|
};
|
|
};
|
|
};
|
|
|
|
&ssi1 {
|
|
shared-pin;
|
|
};
|
|
|
|
=============================================
|
|
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 Multi channel
|
|
=============================================
|
|
|
|
&rcar_sound {
|
|
pinctrl-0 = <&sound_pins &sound_clk_pins>;
|
|
pinctrl-names = "default";
|
|
|
|
/* Single DAI */
|
|
#sound-dai-cells = <0>;
|
|
|
|
status = "okay";
|
|
|
|
rcar_sound,dai {
|
|
dai0 {
|
|
playback = <&ssi0 &ssi1 &ssi2 &src0 &dvc0>;
|
|
};
|
|
};
|
|
};
|