linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8450-hdk: add other analogue microphones

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Date:   Tue, 18 Jul 2023 10:40:37 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8450-hdk: add other analogue
 microphones



On 17/07/2023 15:38, Krzysztof Kozlowski wrote:
> Add proper audio routes for onboard analogue microphones: AMIC[1345].
> Use also new DAPM input widget (TX SWR_INPUTn) for them, not the
> deprecated ADC one.  Change is not compatible with older kernels not
> having the new SWR_INPUTn input widget.
> 
> Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Depends on ASoC driver changes:
> https://lore.kernel.org/alsa-devel/20230717140138.201745-1-krzysztof.kozlowski@linaro.org/T/#t
> This patch should wait till respective ASoC changes got merged.
> ---
>   arch/arm64/boot/dts/qcom/sm8450-hdk.dts | 23 ++++++++++++++++-------
>   1 file changed, 16 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> index bd5e8181f2aa..9bd1ef401ca3 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> @@ -915,14 +915,23 @@ &sound {
>   			"SpkrRight IN", "WSA_SPK2 OUT",
>   			"IN1_HPHL", "HPHL_OUT",
>   			"IN2_HPHR", "HPHR_OUT",
> +			"AMIC1", "MIC BIAS1",
>   			"AMIC2", "MIC BIAS2",
> -			"VA DMIC0", "MIC BIAS1",
> -			"VA DMIC1", "MIC BIAS1",
> -			"VA DMIC2", "MIC BIAS3",
> -			"TX DMIC0", "MIC BIAS1",
> -			"TX DMIC1", "MIC BIAS2",
> -			"TX DMIC2", "MIC BIAS3",
> -			"TX SWR_ADC1", "ADC2_OUTPUT";
> +			"AMIC3", "MIC BIAS3",
> +			"AMIC4", "MIC BIAS3",
> +			"AMIC5", "MIC BIAS4",
These should reflect the board-level wiring of MIC BIAS, are you sure 
that this is how the hdk is wired up?

> +			"VA DMIC0", "MIC BIAS3",
> +			"VA DMIC1", "MIC BIAS3",
> +			"VA DMIC2", "MIC BIAS1",
> +			"VA DMIC3", "MIC BIAS1",
> +			"TX DMIC0", "MIC BIAS3",
> +			"TX DMIC1", "MIC BIAS3",
> +			"TX DMIC2", "MIC BIAS1",
> +			"TX DMIC3", "MIC BIAS1",
Same here.

--srini
> +			"TX SWR_INPUT0", "ADC1_OUTPUT",
> +			"TX SWR_INPUT1", "ADC2_OUTPUT",
> +			"TX SWR_INPUT2", "ADC3_OUTPUT",
> +			"TX SWR_INPUT3", "ADC4_OUTPUT";
>   
>   	wcd-playback-dai-link {
>   		link-name = "WCD Playback";