linux-kernel - Re: [PATCH v6 3/3] arm64: dts: qcom: sc7280: Add dt nodes for sound card

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Date:   Mon, 11 Apr 2022 19:42:06 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Matthias Kaehlcke <mka@...omium.org>
CC:     <agross@...nel.org>, <bjorn.andersson@...aro.org>,
        <robh+dt@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <srinivas.kandagatla@...aro.org>, <dianders@...omium.org>,
        <swboyd@...omium.org>, <judyhsiao@...omium.org>,
        Venkata Prasad Potturu <quic_potturu@...cinc.com>,
        <quic_rohkumar@...cinc.com>
Subject: Re: [PATCH v6 3/3] arm64: dts: qcom: sc7280: Add dt nodes for sound
 card


On 4/7/2022 2:15 AM, Matthias Kaehlcke wrote:
Thanks for your time Matthias!!!
> On Tue, Apr 05, 2022 at 04:43:40PM +0530, Srinivasa Rao Mandadapu wrote:
>> Add dt nodes for sound card support, which is using WCD938x headset
>> playback, capture, I2S speaker playback and DMICs via VA macro.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>> Co-developed-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
>> Signed-off-by: Venkata Prasad Potturu <quic_potturu@...cinc.com>
>> ---
>>   arch/arm64/boot/dts/qcom/sc7280-crd.dts  |  8 +++
>>   arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 93 ++++++++++++++++++++++++++++++++
>>   2 files changed, 101 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
>> index 224a82d..b1b968a 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
>> @@ -90,6 +90,14 @@ ap_ts_pen_1v8: &i2c13 {
>>   	us-euro-gpios = <&tlmm 81 GPIO_ACTIVE_HIGH>;
>>   };
>>   
>> +&sound {
>> +	audio-routing =
>> +		"VA DMIC0", "MIC BIAS1",
>> +		"VA DMIC1", "MIC BIAS1",
>> +		"VA DMIC2", "MIC BIAS3",
>> +		"VA DMIC3", "MIC BIAS3";
>> +};
>> +
>>   &tlmm {
>>   	tp_int_odl: tp-int-odl {
>>   		pins = "gpio7";
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> index e3d8cbf..45e1d82 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> @@ -84,6 +84,99 @@
>>   		pinctrl-names = "default";
>>   		pinctrl-0 = <&nvme_pwren>;
>>   	};
>> +
>> +	sound: sound {
>> +		compatible = "google,sc7280-herobrine";
>> +		model = "sc7280-wcd938x-max98360a-1mic";
>> +
>> +		audio-routing =
>> +				"IN1_HPHL", "HPHL_OUT",
>> +				"IN2_HPHR", "HPHR_OUT",
>> +				"AMIC1", "MIC BIAS1",
>> +				"AMIC2", "MIC BIAS2",
>> +				"VA DMIC0", "MIC BIAS3",
>> +				"VA DMIC1", "MIC BIAS3",
>> +				"VA DMIC2", "MIC BIAS1",
>> +				"VA DMIC3", "MIC BIAS1",
>> +				"TX SWR_ADC0", "ADC1_OUTPUT",
>> +				"TX SWR_ADC1", "ADC2_OUTPUT",
>> +				"TX SWR_ADC2", "ADC3_OUTPUT",
>> +				"TX SWR_DMIC0", "DMIC1_OUTPUT",
>> +				"TX SWR_DMIC1", "DMIC2_OUTPUT",
>> +				"TX SWR_DMIC2", "DMIC3_OUTPUT",
>> +				"TX SWR_DMIC3", "DMIC4_OUTPUT",
>> +				"TX SWR_DMIC4", "DMIC5_OUTPUT",
>> +				"TX SWR_DMIC5", "DMIC6_OUTPUT",
>> +				"TX SWR_DMIC6", "DMIC7_OUTPUT",
>> +				"TX SWR_DMIC7", "DMIC8_OUTPUT";
>> +
>> +		qcom,msm-mbhc-hphl-swh = <1>;
>> +		qcom,msm-mbhc-gnd-swh = <1>;
>> +
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +		#sound-dai-cells = <0>;
>> +
>> +		dai-link@1 {
>> +			link-name = "Secondary MI2S Playback";
> The other link names provide information about the other end
> of the link (DP, WCD, DMIC), while this one describes the SoC side.
> Shouldn't this be "MAX98360A"? Not sure about the 'Playback' part,
> it seems 'link-name' is used as stream name, judging from a few
> samples of peeking into '/proc/asound/pcm' on different devices
> it seems that 'Playback' or 'Capture' is ususally not part of the
> stream name.
Okay. will change accordingly.
>
>> +			reg = <MI2S_SECONDARY>;
>> +			cpu {
>> +				sound-dai = <&lpass_cpu MI2S_SECONDARY>;
>> +			};
>> +
>> +			codec {
>> +				sound-dai = <&max98360a>;
>> +			};
>> +		};
>> +
>> +		dai-link@5 {
>> +			link-name = "DP Playback";
> See comment above about 'Playback'. Just 'DP' is maybe a bit short, how
> about 'DisplayPort'?
Okay. Will change accordingly.
>
>> +			reg = <LPASS_DP_RX>;
>> +			cpu {
>> +				sound-dai = <&lpass_cpu LPASS_DP_RX>;
>> +			};
>> +
>> +			codec {
>> +				sound-dai = <&mdss_dp>;
>> +			};
>> +		};
>> +
>> +		dai-link@6 {
>> +			link-name = "WCD Playback";
> Most instances I found spell out the codec name. It seems here we need
> the 'Playback'/'Capture' info (or something else) to not end up with
> duplicate link names. So my suggestion here would be "WCD9385 Playback".
Okay. Will  update accordingly.
>
>> +			reg = <LPASS_CDC_DMA_RX0>;
>> +			cpu {
>> +				sound-dai = <&lpass_cpu LPASS_CDC_DMA_RX0>;
>> +			};
>> +
>> +			codec {
>> +				sound-dai = <&wcd938x 0>, <&swr0 0>, <&rxmacro 0>;
>> +			};
>> +		};
>> +
>> +		dai-link@19 {
>> +			link-name = "WCD Capture";
> "WCD9385 Capture"?
Okay.
>
>> +			reg = <LPASS_CDC_DMA_TX3>;
>> +			cpu {
>> +				sound-dai = <&lpass_cpu LPASS_CDC_DMA_TX3>;
>> +			};
>> +
>> +			codec {
>> +				sound-dai = <&wcd938x 1>, <&swr1 0>, <&txmacro 0>;
>> +			};
>> +		};
>> +
>> +		dai-link@25 {
>> +			link-name = "DMIC Capture";
>
> just "DMIC"?
Okay.