Message-ID: <5ac149ac-4862-e8c9-185c-524c4b111961@quicinc.com>
Date:   Tue, 19 Apr 2022 16:54:49 +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>,
        <quic_rohkumar@...cinc.com>, <srinivas.kandagatla@...aro.org>,
        <dianders@...omium.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>,
        Venkata Prasad Potturu <quic_potturu@...cinc.com>
Subject: Re: [PATCH v8 2/4] arm64: dts: qcom: sc7280: Add nodes for wcd9385
 and max98360a codec


On 4/18/2022 10:15 PM, Matthias Kaehlcke wrote:
Thanks for your time and valuable inputs Matthias!!!
> On Mon, Apr 18, 2022 at 07:44:10PM +0530, Srinivasa Rao Mandadapu wrote:
>> Add wcd938x and  max98360a codecs for audio use case on
>> sc7280 based platforms.
>> Add tlmm gpio property in wcd938x node for switching CTIA/OMTP Headset.
>> Add amp_en node for  max98360a codec.
> General note: I don't think it's a good practice to add stuff like this to
> multiple boards in a single patch. Why?
>
> First the subject of such a patch tends to be vague ("arm64: dts: qcom:
> sc7280: Add nodes for wcd9385 and max98360a codec"), in this case it gives
> no hint about the boards. If someone was interested in picking changes
> for a given board they can't easily identify from the subject that the
> change is relevant for them.
>
> Changes touching multiple boards are more likely to cause conflicts when
> being picked (or reverted), both upstream and in downstream trees (which
> unfortunately have to exist for product development). Downstream trees
> might only pick changes for the board(s) they target, patches that touch
> mutiple boards often cause conflicts due to context deltas in the
> 'irrelevant' boards.
>
> Lastly it's usually easier to get a patch reviewed (in the sense of
> getting a 'Reviewed-by' tag) and landed that does a single thing.

Yes, agree to your opinion. In a nutshell, we will include board 
name(ex: herobrine)

in commit message and split the patches per external codec.

Actually, in Initial herobrine boards, EVT and IDP, has both maxim 
speaker and WCD codec,

hence we included in same patch.

>> 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-r3.dts     |  6 ++
>>   arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi |  8 +++
>>   arch/arm64/boot/dts/qcom/sc7280-idp.dtsi       | 97 ++++++++++++++++++++++++++
>>   3 files changed, 111 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
>> index 344338a..aa0bf6e2 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
>> @@ -87,6 +87,12 @@ ap_ts_pen_1v8: &i2c13 {
>>   	pins = "gpio51";
>>   };
>>   
>> +&wcd938x {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&us_euro_hs_sel>;
>> +	us-euro-gpios = <&tlmm 81 GPIO_ACTIVE_HIGH>;
>> +};
> Since this is added for the CRD rev3 it probably should also be added to
> sc7280-herobrine-crd.dts
Okay. Will add in corresponding latest herobrine CRD dts file also.
>
>> +
>>   &tlmm {
>>   	tp_int_odl: tp-int-odl {
>>   		pins = "gpio7";
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> index d58045d..f247403 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
>> @@ -20,6 +20,14 @@
>>   #include "sc7280-chrome-common.dtsi"
>>   
>>   / {
>> +	max98360a: audio-codec-0 {
>> +		compatible = "maxim,max98360a";
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&amp_en>;
>> +		sdmode-gpios = <&tlmm 63 GPIO_ACTIVE_HIGH>;
>> +		#sound-dai-cells = <0>;
>> +	};
>> +
>>   	chosen {
>>   		stdout-path = "serial0:115200n8";
>>   	};
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> index 2f863c0..8dad599 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> @@ -20,6 +20,42 @@
>>   		serial1 = &uart7;
>>   	};
>>   
>> +	max98360a: audio-codec-0 {
>> +		compatible = "maxim,max98360a";
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&amp_en>;
>> +		sdmode-gpios = <&tlmm 63 GPIO_ACTIVE_HIGH>;
>> +		#sound-dai-cells = <0>;
>> +	};
>> +
>> +	wcd938x: audio-codec-1 {
> Why 'wcd938x' and not 'wcd9385'?

Actually same driver is used for both wcd9380 and wcd9385. Here we can 
use specific name as per board.

Will change accordingly.

>
>> +		compatible = "qcom,wcd9385-codec";
>> +		pinctrl-names = "default", "sleep";
>> +		pinctrl-0 = <&wcd_reset_n>;
>> +		pinctrl-1 = <&wcd_reset_n_sleep>;
>> +
>> +		reset-gpios = <&tlmm 83 GPIO_ACTIVE_HIGH>;
>> +
>> +		qcom,rx-device = <&wcd_rx>;
>> +		qcom,tx-device = <&wcd_tx>;
>> +
>> +		vdd-rxtx-supply = <&vreg_l18b_1p8>;
>> +		vdd-io-supply = <&vreg_l18b_1p8>;
>> +		vdd-buck-supply = <&vreg_l17b_1p8>;
>> +		vdd-mic-bias-supply = <&vreg_bob>;
>> +
>> +		qcom,micbias1-microvolt = <1800000>;
>> +		qcom,micbias2-microvolt = <1800000>;
>> +		qcom,micbias3-microvolt = <1800000>;
>> +		qcom,micbias4-microvolt = <1800000>;
>> +
>> +		qcom,mbhc-buttons-vthreshold-microvolt = <75000 150000 237000 500000 500000
>> +							  500000 500000 500000>;
>> +		qcom,mbhc-headset-vthreshold-microvolt = <1700000>;
>> +		qcom,mbhc-headphone-vthreshold-microvolt = <50000>;
>> +		#sound-dai-cells = <1>;
>> +	};
> Also add this node to sc7280-herobrine-crd.dts?
Okay. will do accordingly.
>
>> +
>>   	gpio-keys {
>>   		compatible = "gpio-keys";
>>   		label = "gpio-keys";
>> @@ -238,6 +274,19 @@
>>   	modem-init;
>>   };
>>   
>> +&lpass_rx_macro {
>> +	status = "okay";
>> +};
>> +
>> +&lpass_tx_macro {
>> +	status = "okay";
>> +};
>> +
>> +&lpass_va_macro {
>> +	status = "okay";
>> +	vdd-micb-supply = <&vreg_bob>;
>> +};
> Enable these also in sc7280-herobrine.dtsi if other nodes are added to
> sc7280-herobrine-crd.dts.
Okay.
>
>> +
>>   &pcie1 {
>>   	status = "okay";
>>   	perst-gpio = <&tlmm 2 GPIO_ACTIVE_LOW>;
>> @@ -298,6 +347,26 @@
>>   	cd-gpios = <&tlmm 91 GPIO_ACTIVE_LOW>;
>>   };
>>   
>> +&swr0 {
>> +	status = "okay";
> nit: add an empty line between properties and nodes
Okay.
>
>> +	wcd_rx: codec@0,4 {
>> +		compatible = "sdw20217010d00";
>> +		reg = <0 4>;
>> +		#sound-dai-cells = <1>;
>> +		qcom,rx-port-mapping = <1 2 3 4 5>;
>> +	};
>> +};
>> +
>> +&swr1 {
>> +	status = "okay";
> ditto
Okay.
>
>> +	wcd_tx: codec@0,3 {
>> +		compatible = "sdw20217010d00";
>> +		reg = <0 3>;
>> +		#sound-dai-cells = <1>;
>> +		qcom,tx-port-mapping = <1 2 3 4>;
>> +	};
>> +};
> Also add these to sc7280-herobrine-crd.dts?
Okay.
>
>> +
>>   &uart5 {
>>   	compatible = "qcom,geni-debug-uart";
>>   	status = "okay";
>> @@ -561,6 +630,12 @@
>>   };
>>   
>>   &tlmm {
>> +	amp_en: amp-en {
>> +		pins = "gpio63";
>> +		bias-pull-down;
>> +		drive-strength = <2>;
>> +	};
>> +
>>   	bt_en: bt-en {
>>   		pins = "gpio85";
>>   		function = "gpio";
>> @@ -643,6 +718,28 @@
>>   		function = "gpio";
>>   		bias-pull-down;
>>   	};
>> +
>> +	us_euro_hs_sel: us-euro-hs-sel {
>> +		pins = "gpio81";
>> +		function = "gpio";
>> +		bias-pull-down;
>> +		drive-strength = <2>;
>> +	};
>> +
>> +	wcd_reset_n: wcd-reset-n {
>> +		pins = "gpio83";
>> +		function = "gpio";
>> +		drive-strength = <8>;
>> +		output-high;
>> +	};
>> +
>> +	wcd_reset_n_sleep: wcd-reset-n-sleep {
>> +		pins = "gpio83";
>> +		function = "gpio";
>> +		drive-strength = <8>;
>> +		bias-disable;
>> +		output-low;
>> +	};
> Also add to sc7280-herobrine-crd.dts if the other nodes are added.
Okay.

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