linux-kernel - Re: [PATCH] arm64: dts: meson: khadas-vim3l: enable audio

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Date:   Fri, 18 Oct 2019 18:14:11 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Christian Hewitt <christianshewitt@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: meson: khadas-vim3l: enable audio


On Fri 18 Oct 2019 at 12:05, Christian Hewitt <christianshewitt@...il.com> wrote:

> Add and enable the audio nodes on the VIM3L. This is based on the recent
> submission for the SEI610 device [1] and the existing VIM3 dts.
>
> [1] https://patchwork.kernel.org/patch/11180785/
>
> Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
> ---
>  .../boot/dts/amlogic/meson-sm1-khadas-vim3l.dts    | 147 +++++++++++++++++++++
>  1 file changed, 147 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l.dts
> index dbbf29a..d07f0cf 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-sm1-khadas-vim3l.dts
> @@ -8,6 +8,7 @@
>  
>  #include "meson-sm1.dtsi"
>  #include "meson-khadas-vim3.dtsi"
> +#include <dt-bindings/sound/meson-g12a-tohdmitx.h>
>  
>  / {
>  	compatible = "khadas,vim3l", "amlogic,sm1";
> @@ -31,6 +32,86 @@
>  		regulator-boot-on;
>  		regulator-always-on;
>  	};
> +
> +	sound {
> +		compatible = "amlogic,axg-sound-card";
> +		model = "SM1-KHADAS-VIM3L";
> +		audio-aux-devs = <&tdmout_a>, <&tdmout_b>,
> +				 <&tdmin_a>, <&tdmin_b>;
> +		audio-routing = "TDMOUT_A IN 0", "FRDDR_A OUT 0",
> +				"TDMOUT_A IN 1", "FRDDR_B OUT 0",
> +				"TDMOUT_A IN 2", "FRDDR_C OUT 0",
> +				"TDM_A Playback", "TDMOUT_A OUT",

The route above are useless since you are not using TDM A in this card

> +				"TDMOUT_B IN 0", "FRDDR_A OUT 1",
> +				"TDMOUT_B IN 1", "FRDDR_B OUT 1",
> +				"TDMOUT_B IN 2", "FRDDR_C OUT 1",
> +				"TDM_B Playback", "TDMOUT_B OUT";
> +
> +		assigned-clocks = <&clkc CLKID_MPLL2>,
> +				  <&clkc CLKID_MPLL0>,
> +				  <&clkc CLKID_MPLL1>;
> +		assigned-clock-parents = <0>, <0>, <0>;
> +		assigned-clock-rates = <294912000>,
> +				       <270950400>,
> +				       <393216000>;
> +		status = "okay";
> +
> +		dai-link-0 {
> +			sound-dai = <&frddr_a>;
> +		};
> +
> +		dai-link-1 {
> +			sound-dai = <&frddr_b>;
> +		};
> +
> +		dai-link-2 {
> +			sound-dai = <&frddr_c>;
> +		};

You have only one output, so one FRDDR is enough.
So either enable a put just one, or put them all (including FRDDR D)

> +
> +		dai-link-3 {
> +			sound-dai = <&toddr_a>;
> +		};
> +
> +		dai-link-4 {
> +			sound-dai = <&toddr_b>;
> +		};
> +
> +		dai-link-5 {
> +			sound-dai = <&toddr_c>;
> +		};

There is no capture Backend, to the TODDR are useless

> +
> +		/* 8ch hdmi interface */
> +		dai-link-6 {
> +			sound-dai = <&tdmif_b>;

Any particular reason for using TDM B interface ? What is khadas doing
in there own code ?

> +			dai-format = "i2s";
> +			dai-tdm-slot-tx-mask-0 = <1 1>;
> +			dai-tdm-slot-tx-mask-1 = <1 1>;
> +			dai-tdm-slot-tx-mask-2 = <1 1>;
> +			dai-tdm-slot-tx-mask-3 = <1 1>;
> +			mclk-fs = <256>;
> +
> +			codec {
> +				sound-dai = <&tohdmitx TOHDMITX_I2S_IN_B>;
> +			};
> +		};
> +
> +		/* hdmi glue */
> +		dai-link-7 {
> +			sound-dai = <&tohdmitx TOHDMITX_I2S_OUT>;
> +
> +			codec {
> +				sound-dai = <&hdmi_tx>;
> +			};
> +		};
> +	};
> +};
> +
> +&arb {
> +	status = "okay";
> +};
> +
> +&clkc_audio {
> +	status = "okay";
>  };
>  
>  &cpu0 {
> @@ -61,6 +142,24 @@
>  	clock-latency = <50000>;
>  };
>  
> +&frddr_a {
> +	status = "okay";
> +};
> +
> +&frddr_b {
> +	status = "okay";
> +};
> +
> +&frddr_c {
> +	status = "okay";
> +};
> +
> +&pdm {
> +	pinctrl-0 = <&pdm_din0_z_pins>, <&pdm_dclk_z_pins>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +};

Why do you enable PDM ? does this board provide some digital mics ?
There is no links using PDM in your card. Please clarify

> +
>  &pwm_AO_cd {
>  	pinctrl-0 = <&pwm_ao_d_e_pins>;
>  	pinctrl-names = "default";
> @@ -93,3 +192,51 @@
>  	phy-names = "usb2-phy0", "usb2-phy1";
>  };
>   */
> +
> +&tdmif_a {
> +	pinctrl-0 = <&tdm_a_dout0_pins>, <&tdm_a_fs_pins>, <&tdm_a_sclk_pins>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +
> +	assigned-clocks = <&clkc_audio AUD_CLKID_TDM_SCLK_PAD0>,
> +			  <&clkc_audio AUD_CLKID_TDM_LRCLK_PAD0>;
> +	assigned-clock-parents = <&clkc_audio AUD_CLKID_MST_A_SCLK>,
> +				 <&clkc_audio AUD_CLKID_MST_A_LRCLK>;
> +	assigned-clock-rates = <0>, <0>;
> +};
> +
> +&tdmif_b {
> +	status = "okay";
> +};
> +
> +&tdmin_a {
> +	status = "okay";
> +};
> +
> +&tdmin_b {
> +	status = "okay";
> +};
> +
> +&tdmout_a {
> +	status = "okay";
> +};
> +
> +&tdmout_b {
> +	status = "okay";
> +};
> +
> +&toddr_a {
> +	status = "okay";
> +};
> +
> +&toddr_b {
> +	status = "okay";
> +};
> +
> +&toddr_c {
> +	status = "okay";
> +};
> +
> +&tohdmitx {
> +	status = "okay";
> +};