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

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Message-ID: <20200320084406.GB4344@pflmari>
Date:   Fri, 20 Mar 2020 09:44:06 +0100
From:   Alex Riesen <alexander.riesen@...itec.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.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 Laurent,

Laurent Pinchart, Thu, Mar 19, 2020 19:01:25 +0100:
> 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.

Of course. I shall take a look at that.

> >  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/ ?

Done.

> > +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 ?

Would it? If the port itself is optional, shouldn't the clock be an option
too?

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

Thanks!

Regards,
Alex