Re: [PATCH v2 10/12] dt-bindings: mediatek: mt8188: add audio afe document

["Trevor Wu (吳文良)" <Trevor.Wu@mediatek.com>]

On Mon, 2022-10-24 at 13:33 -0500, Rob Herring wrote:
> On Fri, Oct 21, 2022 at 04:27:17PM +0800, Trevor Wu wrote:
> > Add mt8188 audio afe document.
> > 
> > Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
> > ---
> >  .../bindings/sound/mt8188-afe-pcm.yaml        | 187
> > ++++++++++++++++++
> >  1 file changed, 187 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/sound/mt8188-
> > afe-pcm.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/sound/mt8188-afe-
> > pcm.yaml b/Documentation/devicetree/bindings/sound/mt8188-afe-
> > pcm.yaml
> > new file mode 100644
> > index 000000000000..b2c548c31e4d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/sound/mt8188-afe-pcm.yaml
> > @@ -0,0 +1,187 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > 

..snip
> > 
> > +
> > +patternProperties:
> > +  "^mediatek,etdm-in[1-2]-chn-disabled$":
> > +    $ref: /schemas/types.yaml#/definitions/uint8-array
> > +    maxItems: 16
> > +    description: |
> 
> Don't need '|'
> 
> > +      Specify which input channel should be disabled, so the data
> > of
> > +      specified channel won't be outputted to memory.
> 
> I'm not clear on what each of the 16 entries represents. What's index
> 0, 
> 1, 2, etc.?

Hi Rob,

Ext Codec -> ETDM_IN -> MEMIF(DMA) -> Memory

The maximum channel number of etdm-in is 16.
The index matches to the input channel ID.
0 : CH0
1 : CH1
...
15: CH15

User can config the channel ID they don't want to be outputted to
memory in the property.

For example,
For 4 channels ETDM connection, and the following property is
configured.

"mediatek,etdm-in1-chn-disabled = <0>;"

Received etdm1 input data outputted to memory will be [d0_ch1, d0_ch2,
d0_ch3, d1_ch1, d1_ch2, d1_ch3, ...]. CH0 is dropped.

> 
> > +    items:
> > +      enum: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
> 
> maximum: 15
> 
> 
> > +
> > +  "^mediatek,etdm-in[1-2]-mclk-always-on-rate-hz$":
> > +    description: Specify etdm in mclk output rate for always on
> > case.
> > +
> > +  "^mediatek,etdm-out[1-3]-mclk-always-on-rate-hz$":
> > +    description: Specify etdm out mclk output rate for always on
> > case.
> > +
> > +  "^mediatek,etdm-in[1-2]-multi-pin-mode$":
> > +    type: boolean
> > +    description: if present, the etdm data mode is I2S.
> > +
> > +  "^mediatek,etdm-out[1-3]-multi-pin-mode$":
> > +    type: boolean
> > +    description: if present, the etdm data mode is I2S.
> > +
> > +  "^mediatek,etdm-in[1-2]-cowork-source$":
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: |
> > +      etdm modules can share the same external clock pin. Specify
> > +      which etdm clock source is required by this etdm in moudule.
> > +    enum:
> > +      - 0 # etdm1_in
> > +      - 1 # etdm2_in
> > +      - 2 # etdm1_out
> > +      - 3 # etdm2_out
> > +
> > +  "^mediatek,etdm-out[1-2]-cowork-source$":
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: |
> > +      etdm modules can share the same external clock pin. Specify
> > +      which etdm clock source is required by this etdm out
> > moudule.
> > +    enum:
> > +      - 0 # etdm1_in
> > +      - 1 # etdm2_in
> > +      - 2 # etdm1_out
> > +      - 3 # etdm2_out
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - resets
> > +  - reset-names
> > +  - mediatek,topckgen
> > +  - power-domains
> > +  - clocks
> > +  - clock-names
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +
> > +    afe: afe@10b10000 {
> > +        compatible = "mediatek,mt8188-afe";
> > +        reg = <0x10b10000 0x10000>;
> > +        interrupts = <GIC_SPI 822 IRQ_TYPE_LEVEL_HIGH 0>;
> > +        resets = <&watchdog 14>;
> > +        reset-names = "audiosys";
> > +        mediatek,topckgen = <&topckgen>;
> > +        power-domains = <&spm 13>; //MT8188_POWER_DOMAIN_AUDIO
> > +        clocks = <&clk26m>,
> > +                 <&topckgen 72>, //CLK_TOP_APLL1
> > +                 <&topckgen 73>, //CLK_TOP_APLL2
> > +                 <&topckgen 186>, //CLK_TOP_APLL12_CK_DIV0
> > +                 <&topckgen 187>, //CLK_TOP_APLL12_CK_DIV1
> > +                 <&topckgen 188>, //CLK_TOP_APLL12_CK_DIV2
> > +                 <&topckgen 189>, //CLK_TOP_APLL12_CK_DIV3
> > +                 <&topckgen 191>, //CLK_TOP_APLL12_CK_DIV9
> > +                 <&topckgen 83>, //CLK_TOP_A1SYS_HP
> > +                 <&topckgen 31>, //CLK_TOP_AUD_INTBUS
> > +                 <&topckgen 32>, //CLK_TOP_AUDIO_H
> > +                 <&topckgen 69>, //CLK_TOP_AUDIO_LOCAL_BUS
> > +                 <&topckgen 81>, //CLK_TOP_DPTX
> > +                 <&topckgen 77>, //CLK_TOP_I2SO1
> > +                 <&topckgen 78>, //CLK_TOP_I2SO2
> > +                 <&topckgen 79>, //CLK_TOP_I2SI1
> > +                 <&topckgen 80>, //CLK_TOP_I2SI2
> > +                 <&adsp_audio26m 0>; //CLK_AUDIODSP_AUDIO26M
> > +        clock-names = "clk26m",
> > +                      "apll1_ck",
> > +                      "apll2_ck",
> > +                      "apll12_div0",
> > +                      "apll12_div1",
> > +                      "apll12_div2",
> > +                      "apll12_div3",
> > +                      "apll12_div9",
> > +                      "a1sys_hp_sel",
> > +                      "aud_intbus_sel",
> > +                      "audio_h_sel",
> > +                      "audio_local_bus_sel",
> > +                      "dptx_m_sel",
> > +                      "i2so1_m_sel",
> > +                      "i2so2_m_sel",
> > +                      "i2si1_m_sel",
> > +                      "i2si2_m_sel",
> > +                      "adsp_audio_26m";
> 
> It's good if the examples include optional properties so we at least 
> have some validation the schema matches the DTS.
> 
OK, I will put some optional properties in V3.

Thanks,
Trevor

> > +    };
> > +
> > +...
> > -- 
> > 2.18.0
> > 
> > 
> 
>