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Date:   Fri, 6 Mar 2020 18:37:42 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     agross@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] arm64: dts: qcom: sdm845: Add ADSP audio support

On Thu 05 Mar 06:53 PST 2020, Srinivas Kandagatla wrote:

> This patch adds support to basic dsp audio, codec, slimbus
> and soundwire controller DT nodes.
> 

I wouldn't be against the idea of splitting this patch in a few...

> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 338 +++++++++++++++++++++++++++
>  1 file changed, 338 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 061f49faab19..705d8a0c3a1e 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -20,6 +20,7 @@
>  #include <dt-bindings/soc/qcom,rpmh-rsc.h>
>  #include <dt-bindings/clock/qcom,gcc-sdm845.h>
>  #include <dt-bindings/thermal/thermal.h>
> +#include <dt-bindings/soc/qcom,apr.h>

Please keep these sorted alphabetically.

>  
>  / {
>  	interrupt-parent = <&intc>;
> @@ -491,6 +492,54 @@
>  			label = "lpass";
>  			qcom,remote-pid = <2>;
>  			mboxes = <&apss_shared 8>;

Please add an empty line here.

> +			apr {
> +				compatible = "qcom,apr-v2";
> +				qcom,glink-channels = "apr_audio_svc";
> +				qcom,apr-domain = <APR_DOMAIN_ADSP>;
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				qcom,intents = <512 20>;
> +
> +				q6core {

q6core@3

Due to the reg.

> +					reg = <APR_SVC_ADSP_CORE>;
> +					compatible = "qcom,q6core";

Don't we want some qcom,protection-domain properties on these?

> +				};
> +
> +				q6afe: q6afe {

q6afe@4

> +					compatible = "qcom,q6afe";
> +					reg = <APR_SVC_AFE>;
> +					q6afedai: dais {
> +						compatible = "qcom,q6afe-dais";
> +						#address-cells = <1>;
> +						#size-cells = <0>;
> +						#sound-dai-cells = <1>;
> +
> +						qi2s@22 {
> +							reg = <22>;
> +							qcom,sd-lines = <0 1 2 3>;
> +						};
> +					};
> +				};
> +
> +				q6asm: q6asm {

q6asm@7

> +					compatible = "qcom,q6asm";
> +					reg = <APR_SVC_ASM>;
> +					q6asmdai: dais {
> +						compatible = "qcom,q6asm-dais";
> +						#sound-dai-cells = <1>;
> +						iommus = <&apps_smmu 0x1821 0x0>;
> +					};
> +				};
> +
> +				q6adm: q6adm {

q6adm@8

Or perhaps then, as we have a unit address, these could use a generic
name and be on the form:

q6adm: apr-service@8 {

> +					compatible = "qcom,q6adm";
> +					reg = <APR_SVC_ADM>;
> +					q6routing: routing {
> +						compatible = "qcom,q6adm-routing";
> +						#sound-dai-cells = <0>;
> +					};
> +				};
> +			};

Please take the opportunity of adding an empty line here as well.

>  			fastrpc {
>  				compatible = "qcom,fastrpc";
>  				qcom,glink-channels = "fastrpcglink-apps-dsp";
> @@ -513,6 +562,9 @@
>  		};
>  	};
>  
> +	sound: sound {
> +	};
> +
>  	cdsp_pas: remoteproc-cdsp {
>  		compatible = "qcom,sdm845-cdsp-pas";
>  
> @@ -1782,6 +1834,142 @@
>  				};
>  			};
>  
> +			quat_mi2s_sleep: quat_mi2s_sleep {

Are these all board-agnostic or should they live in the board.dts files
instead?

For all of these, please replace _ with - in the node names.

> +				mux {
> +					pins = "gpio58", "gpio59";
> +					function = "gpio";
> +				};
> +
> +				config {
> +					pins = "gpio58", "gpio59";
> +					drive-strength = <2>;   /* 2 mA */
> +					bias-pull-down;         /* PULL DOWN */

Please omit these comments, given that the properties are quite
descriptive already.

> +					input-enable;
> +				};

And you don't need the subnode level these days, i.e. this can be
written as:

			quat_mi2s_sleep: quat-mi2s-sleep {
				pins = "gpio58", "gpio59";
				function = "gpio";
				drive-strength = <2>;
				bias-pull-down;
				input-enable;
			};

> +			};
> +
[..]
> @@ -2602,6 +2843,91 @@
>  			status = "disabled";
>  		};
>  
> +		slim_msm: slim@...c0000 {
> +			compatible = "qcom,slim-ngd-v2.1.0";
> +			reg = <0 0x171c0000 0 0x2C000>;

Please lowercase the digits of the size.

> +			reg-names = "ctrl";

reg-names is not in binding, nor used by driver.

> +			interrupts = <0 163 IRQ_TYPE_LEVEL_HIGH>;

s/0/GIC_SPI/

> +
> +			qcom,apps-ch-pipes = <0x780000>;
> +			qcom,ea-pc = <0x270>;
> +			status = "okay";
> +			dmas =	<&slimbam 3>, <&slimbam 4>,
> +				<&slimbam 5>, <&slimbam 6>;
> +			dma-names = "rx", "tx", "tx2", "rx2";
> +
> +			iommus = <&apps_smmu 0x1806 0x0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			ngd@1 {
> +				reg = <1>;
> +				#address-cells = <1>;
> +				#size-cells = <1>;
> +
> +				wcd9340_ifd: tas-ifd {

@0 given the reg, perhaps codec@0?

> +					compatible = "slim217,250";
> +					reg  = <0 0>;

Out of curiosity, why does ngd@1 have #size-cells = <1>, but then all
codecs have size 0?

> +				};
> +
> +				wcd9340: codec@1{
> +					pinctrl-0 = <&wcd_intr_default>;
> +					pinctrl-names = "default";
> +					compatible = "slim217,250";
> +					reg  = <1 0>;

I do prefer when the nodes start with compatible and then reg...

> +					reset-gpios = <&tlmm 64 0>;
> +					slim-ifc-dev  = <&wcd9340_ifd>;
> +
> +					#sound-dai-cells = <1>;
> +
> +					interrupt-parent = <&tlmm>;
> +					interrupts = <54 IRQ_TYPE_LEVEL_HIGH>;


How about combining the interrupt-parent and interrupts as:
					interrupts-extended = <&tlmm 54 IRQ_TYPE_LEVEL_HIGH>;

> +					interrupt-controller;
> +					#interrupt-cells = <1>;
> +
> +					#clock-cells = <0>;
> +					clock-frequency = <9600000>;
> +					clock-output-names = "mclk";
> +					qcom,micbias1-millivolt = <1800>;
> +					qcom,micbias2-millivolt = <1800>;
> +					qcom,micbias3-millivolt = <1800>;
> +					qcom,micbias4-millivolt = <1800>;
> +
> +					#address-cells = <1>;
> +					#size-cells = <1>;
> +
> +					wcdpinctrl: wcd-pinctrl@42 {

s/wcd-pinctrl/gpio-controller/

> +						compatible = "qcom,wcd9340-gpio";
> +						gpio-controller;
> +						#gpio-cells = <2>;
> +						reg = <0x42 0x2>;
> +					};
> +
> +					swm: swm@c85 {
> +						compatible = "qcom,soundwire-v1.3.0";
> +						reg = <0xc85 0x40>;
> +						interrupt-parent = <&wcd9340>;
> +						interrupts = <20 IRQ_TYPE_EDGE_RISING>;

interrupts-extended?

> +						interrupt-names = "soundwire";

No interrupt-names in binding and driver resolves the interrupt by
index, so you can omit this.

> +
> +						qcom,dout-ports	= <6>;
> +						qcom,din-ports	= <2>;
> +						qcom,ports-sinterval-low =/bits/ 8  <0x07 0x1F 0x3F 0x7 0x1F 0x3F 0x0F 0x0F>;
> +						qcom,ports-offset1 = /bits/ 8 <0x01 0x02 0x0C 0x6 0x12 0x0D 0x07 0x0A >;
> +						qcom,ports-offset2 = /bits/ 8 <0x00 0x00 0x1F 0x00 0x00 0x1F 0x00 0x00>;
> +
> +						#sound-dai-cells = <1>;
> +						clocks = <&wcd9340>;
> +						clock-names = "iface";
> +                                                #address-cells = <2>;
> +                                                #size-cells = <0>;

Odd indentation on these two.

> +
> +

Empty lines?

> +					};
> +				};
> +			};
> +		};
> +
>  		usb_1_hsphy: phy@...2000 {
>  			compatible = "qcom,sdm845-qusb2-phy";
>  			reg = <0 0x088e2000 0 0x400>;
> @@ -3446,6 +3772,18 @@
>  			};
>  		};
>  
> +		slimbam: bamdma@...84000 {

s/bamdma/dma/

Regards,
Bjorn

> +			compatible = "qcom,bam-v1.7.0";
> +			qcom,controlled-remotely;
> +			reg = <0 0x17184000 0 0x2a000>;
> +			num-channels  = <31>;
> +			interrupts = <0 164 IRQ_TYPE_LEVEL_HIGH>;

s/0/GIC_SPI/

Regards,
Bjorn

> +			#dma-cells = <1>;
> +			qcom,ee = <1>;
> +			qcom,num-ees = <2>;
> +			iommus = <&apps_smmu 0x1806 0x0>;
> +		};
> +
>  		timer@...90000 {
>  			#address-cells = <2>;
>  			#size-cells = <2>;
> -- 
> 2.21.0
> 

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