linux-kernel - Re: [PATCH v2 08/10] ARM: dts: sun8i: Add audio codec, dai and card for A33

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Message-ID: <20170117165847.olotkisojwgtdzrz@lukather>
Date:   Tue, 17 Jan 2017 17:58:47 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Mylène Josserand 
        <mylene.josserand@...e-electrons.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, wens@...e.org, mturquette@...libre.com,
        sboyd@...eaurora.org, mark.rutland@....com, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-sunxi@...glegroups.com,
        thomas.petazzoni@...e-electrons.com,
        alexandre.belloni@...e-electrons.com
Subject: Re: [PATCH v2 08/10] ARM: dts: sun8i: Add audio codec, dai and card
 for A33

Hi,

On Tue, Jan 17, 2017 at 03:02:28PM +0100, Mylène Josserand wrote:
> Add the audio codec, dai and a simple card to be able to use the
> audio stream of the builtin codec on sun8i SoC.
> 
> This commit adds also an audio-routing for the sound card node to link
> the analog DAPM widgets (Right/Left DAC) and the digital one's as they
> are created in different drivers.
> 
> Signed-off-by: Mylène Josserand <mylene.josserand@...e-electrons.com>
> ---
>  arch/arm/boot/dts/sun8i-a33.dtsi | 47 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
> index 63d5181ffff8..fe8a4f4760d2 100644
> --- a/arch/arm/boot/dts/sun8i-a33.dtsi
> +++ b/arch/arm/boot/dts/sun8i-a33.dtsi
> @@ -43,6 +43,7 @@
>   */
>  
>  #include "sun8i-a23-a33.dtsi"
> +#include <dt-bindings/dma/sun4i-a10.h>
>  
>  / {
>  	cpus {
> @@ -69,6 +70,27 @@
>  		reg = <0x40000000 0x80000000>;
>  	};
>  
> +	sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "Sun8i Audio Card";

You might have several of them if you're using an internal i2s DAI
with a codec too. What about "a33-codec" or something alike?

> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,frame-master = <&link_codec>;
> +		simple-audio-card,bitclock-master = <&link_codec>;
> +		simple-audio-card,mclk-fs = <512>;
> +		simple-audio-card,aux-devs = <&codec_analog>;
> +		simple-audio-card,routing =
> +				"Left DAC", "Digital Left DAC",
> +				"Right DAC", "Digital Right DAC";

This will be enabled all the time (even if your DAI and codec are
not), which means that the driver will probe and.. do nothing. You
probably want to disable it here.

> +
> +		simple-audio-card,cpu {
> +			sound-dai = <&dai>;
> +		};
> +
> +		link_codec: simple-audio-card,codec {
> +			sound-dai = <&codec>;
> +		};
> +	};
> +
>  	soc@...00000 {
>  		tcon0: lcd-controller@...0c000 {
>  			compatible = "allwinner,sun8i-a33-tcon";
> @@ -116,6 +138,31 @@
>  			reset-names = "ahb";
>  		};
>  
> +		dai: dai@...22c00 {
> +			#sound-dai-cells = <0>;
> +			compatible = "allwinner,sun6i-a31-i2s";
> +			reg = <0x01c22c00 0x200>;
> +			interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_CODEC>, <&ccu CLK_AC_DIG>;
> +			clock-names = "apb", "mod";
> +			resets = <&ccu RST_BUS_CODEC>;
> +			reset-names = "rst";
> +			dmas = <&dma 15>, /* AUDIO_CODEC port */
> +				<&dma 15>; /* AUDIO_CODEC port */

There's no need for those comments.

Thanks!
Maxime 

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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