linux-kernel - Re: [PATCH v2 07/10] dt-bindings: adv748x: add information about serial audio interface (I2S/TDM)

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Message-ID: <20200319180125.GJ14585@pendragon.ideasonboard.com>
Date:   Thu, 19 Mar 2020 20:01:25 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Alex Riesen <alexander.riesen@...itec.com>
Cc:     Kieran Bingham <kieran.bingham@...asonboard.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        devel@...verdev.osuosl.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v2 07/10] dt-bindings: adv748x: add information about
 serial audio interface (I2S/TDM)

Hi Alex,

Thank you for the patch.

On Thu, Mar 19, 2020 at 06:42:36PM +0100, Alex Riesen wrote:
> As the driver has some support for the audio interface of the device,
> the bindings file should mention it.

While at it, how about converting the bindings to YAML ? :-) It can of
course be done on top.

> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Alexander Riesen <alexander.riesen@...itec.com>
> ---
>  .../devicetree/bindings/media/i2c/adv748x.txt    | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/adv748x.txt b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> index 4f91686e54a6..7d6db052c294 100644
> --- a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> +++ b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> @@ -2,7 +2,9 @@
>  
>  The ADV7481 and ADV7482 are multi format video decoders with an integrated
>  HDMI receiver. They can output CSI-2 on two independent outputs TXA and TXB
> -from three input sources HDMI, analog and TTL.
> +from three input sources HDMI, analog and TTL. There is also support for an
> +I2S compatible interface connected to the audio processor of the HDMI decoder.

s/I2S compatible/I2S-compatible/ ?

> +The interface has TDM capability (8 slots, 32 bits, left or right justified).
>  
>  Required Properties:
>  
> @@ -16,6 +18,8 @@ Required Properties:
>      slave device on the I2C bus. The main address is mandatory, others are
>      optional and remain at default values if not specified.
>  
> +  - #clock-cells: must be <0> if the I2S port is used

Wouldn't it be simpler to set it to 0 unconditionally ?

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> +
>  Optional Properties:
>  
>    - interrupt-names: Should specify the interrupts as "intrq1", "intrq2" and/or
> @@ -47,6 +51,7 @@ are numbered as follows.
>  	  TTL		sink		9
>  	  TXA		source		10
>  	  TXB		source		11
> +	  I2S		source		12
>  
>  The digital output port nodes, when present, shall contain at least one
>  endpoint. Each of those endpoints shall contain the data-lanes property as
> @@ -72,6 +77,7 @@ Example:
>  
>  		#address-cells = <1>;
>  		#size-cells = <0>;
> +		#clock-cells = <0>;
>  
>  		interrupt-parent = <&gpio6>;
>  		interrupt-names = "intrq1", "intrq2";
> @@ -113,4 +119,12 @@ Example:
>  				remote-endpoint = <&csi20_in>;
>  			};
>  		};
> +
> +		port@c {
> +			reg = <12>;
> +
> +			adv7482_i2s: endpoint {
> +				remote-endpoint = <&i2s_in>;
> +			};
> +		};
>  	};

-- 
Regards,

Laurent Pinchart