linux-kernel - Re: [PATCH 20/23] ASoC: add simple-graph-card document

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Date:   Fri, 21 Oct 2016 05:45:40 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
CC:     Rob Herring <robh+dt@...nel.org>, Mark Brown <broonie@...nel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Simon <horms@...ge.net.au>,
        Laurent <laurent.pinchart@...asonboard.com>,
        Guennadi <g.liakhovetski@....de>,
        "Grant Likely" <grant.likely@...aro.org>,
        Frank Rowand <frowand.list@...il.com>,
        Linux-DT <devicetree@...r.kernel.org>,
        Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 20/23] ASoC: add simple-graph-card document


Hi Rob

Can I continue this idea (= property on port/endpoint) ?
Of course I will remove "type" from OF graph.

> > > +               type = "sound";
> > 
> > I'm still not convinced this is necessary. This is implied either by
> > the fact there is only one port or perhaps the compatible string.
> 
> Do you mean "on this sample" ? or in general ?
> Indeed this sample is definitely for sound, so type is very clear
> without property.
> But in general, for example HDMI, it want to know port type.
> Anyway, I can remove above "type" from this new sound driver.
> 
> > > +rcar_sound {
> > > +       ...
> > > +       port {
> > > +               compatible = "asoc-simple-graph-card";
> > > +
> > > +               simple-audio-card,format = "left_j";
> > > +               simple-audio-card,bitclock-master = <&ak4643_port>;
> > > +               simple-audio-card,frame-master = <&ak4643_port>;
> > 
> > Don't add a bunch of properties with in port and endpoint nodes. The
> > purpose is to describe the graph. Put these in the parent node or
> > perhaps the codec node.
> 
> These properties are needed on each ports/endpoints on sound at this point.
> If ports/endpoints can't include these, I need to separate these,
> is it correct approach ? ?? see below
> 
> -- current style --
> 
> 	ports {
> 		compatible = "asoc-simple-graph-card";
> 		simple-audio-card,name = "graph-sound";
> 
> 		port@0 {
> 			simple-audio-card,format = "left_j";
> 			simple-audio-card,bitclock-master = <&rcar_ak4613_port>;
> 			simple-audio-card,frame-master = <&rcar_ak4613_port>;
> 
> 			type = "sound";
> 			rcar_ak4613_port: endpoint {
> 				remote-endpoint = <&ak4613_port>;
> 				playback = <&ssi0 &src0 &dvc0>;
> 				capture  = <&ssi1 &src1 &dvc1>;
> 			};
> 		};
> 		port@1 {
> 			simple-audio-card,format = "i2s";
> 			simple-audio-card,bitclock-master = <&rcar_hdmi0_port>;
> 			simple-audio-card,frame-master = <&rcar_hdmi0_port>;
> 			type = "sound";
> 			rcar_hdmi0_port: endpoint {
> 				remote-endpoint = <&du_out_hdmi_snd0>;
> 				playback = <&ssi2>;
> 			};
> 		};
> 		port@2 {
> 			simple-audio-card,format = "i2s";
> 			simple-audio-card,bitclock-master = <&rcar_hdmi1_port>;
> 			simple-audio-card,frame-master = <&rcar_hdmi1_port>;
> 			type = "sound";
> 			rcar_hdmi1_port: endpoint {
> 				remote-endpoint = <&du_out_hdmi_snd1>;
> 				playback = <&ssi3>;
> 			};
> 		};
> 	};
> 
> -- separate style --
> 
> 	ports {
> 		port@0 {
> 			rcar_ak4613_port: endpoint {
> 			}
> 		};
> 		port@1 {
> 			rcar_hdmi0_port: endpoint {
> 			}
> 		};
> 		port@2 {
> 			rcar_hdmi1_port: endpoint {
> 			}
> 		};
> 	};
> 
> 	sound-xxx {
> 		compatible = "asoc-simple-graph-card";
> 
> 		port@0 {
> 			simple-audio-card,format = "left_j";
> 			simple-audio-card,bitclock-master = <&rcar_ak4613_port>;
> 			simple-audio-card,frame-master = <&rcar_ak4613_port>;
> 		};
> 		port@1 {
> 			simple-audio-card,format = "i2s";
> 			simple-audio-card,bitclock-master = <&rcar_hdmi0_port>;
> 			simple-audio-card,frame-master = <&rcar_hdmi0_port>;
> 		};
> 		port@2 {
> 			simple-audio-card,format = "i2s";
> 			simple-audio-card,bitclock-master = <&rcar_hdmi1_port>;
> 			simple-audio-card,frame-master = <&rcar_hdmi1_port>;
> 		};
> 	};
> 
> Best regards
> ---
> Kuninori Morimoto