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| Started by | Rob Herring <robh+dt@kernel.org> |
|---|---|
| First post | 2016-10-18 18:00 +0200 |
| Last post | 2016-10-19 04:50 +0200 |
| Articles | 2 — 1 participant |
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Re: [PATCH 20/23] ASoC: add simple-graph-card document Rob Herring <robh+dt@kernel.org> - 2016-10-18 18:00 +0200
Re: [PATCH 20/23] ASoC: add simple-graph-card document Rob Herring <robh+dt@kernel.org> - 2016-10-19 04:50 +0200
| From | Rob Herring <robh+dt@kernel.org> |
|---|---|
| Date | 2016-10-18 18:00 +0200 |
| Subject | Re: [PATCH 20/23] ASoC: add simple-graph-card document |
| Message-ID | <stEY1-3IP-3@gated-at.bofh.it> |
On Mon, Oct 17, 2016 at 3:38 AM, Kuninori Morimoto
<kuninori.morimoto.gx@renesas.com> wrote:
>
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
> .../bindings/sound/simple-graph-card.txt | 65 ++++++++++++++++++++++
> 1 file changed, 65 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt
>
> diff --git a/Documentation/devicetree/bindings/sound/simple-graph-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> new file mode 100644
> index 0000000..c191c0d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> @@ -0,0 +1,65 @@
> +Simple-Graph-Card:
> +
> +Simple-Graph-Card specifies audio DAI connections of SoC <-> codec.
> +It is based on common bindings for device graphs.
> +see ${LINUX}/Documentation/devicetree/bindings/graph.txt
> +
> +Basically, Simple-Graph-Card is same as Simple-Card, but using graph style.
> +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
> +
> +Below are same as Simple-Card.
> +
> +- simple-audio-card,name
> +- simple-audio-card,widgets
> +- simple-audio-card,routing
> +- simple-audio-card,mclk-fs
> +- simple-audio-card,hp-det-gpio
> +- simple-audio-card,mic-det-gpio
> +- simple-audio-card,format
> +- simple-audio-card,frame-master
> +- simple-audio-card,bitclock-master
> +- simple-audio-card,bitclock-inversion
> +- simple-audio-card,frame-inversion
> +- simple-audio-card,mclk-fs
> +- simple-audio-card,dai-tdm-slot-num
> +- simple-audio-card,dai-tdm-slot-width
> +- clocks / system-clock-frequency
> +
> +This Simple-Graph-Card should be located as CPU driver's port[s].
> +And then, CPU driver need to probe it by itself.
> +
> +Required properties:
> +
> +- compatible : "asoc-simple-graph-card";
> +- type : "sound";
> +
> +Example
> +
> +ak4643: codec@12 {
> + compatible = "asahi-kasei,ak4643";
> + ...
> + port {
> + type = "sound";
> + ak4643_port: endpoint {
> + remote-endpoint = <&rcar_ak4643_port>;
> + clocks = <&audio_clock>;
This belongs in the codec node.
> + };
> + };
> +};
> +
> +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.
> + 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.
> + rcar_ak4643_port: endpoint {
> + remote-endpoint = <&ak4643_port>;
> + playback = <&ssi0 &src2 &dvc0>;
> + capture = <&ssi1 &src3 &dvc1>;
> + };
> + };
> +};
> --
> 1.9.1
>
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| From | Rob Herring <robh+dt@kernel.org> |
|---|---|
| Date | 2016-10-19 04:50 +0200 |
| Message-ID | <stP73-2Yh-9@gated-at.bofh.it> |
| In reply to | #1503151 |
On Tue, Oct 18, 2016 at 8:36 PM, Kuninori Morimoto
<kuninori.morimoto.gx@renesas.com> wrote:
>
> Hi Rob
>
>> > + 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.
For HDMI, the port number should dictate which one is video and which is audio.
>> > +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
Uhh, no. Not at all what I had in mind.
> -- current style --
>
> ports {
> compatible = "asoc-simple-graph-card";
I think your problems start with trying to extend simple-card. This
binding is anything but simple. I think using OF graph is a good idea,
but trying to make it completely generic is not.
> 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>;
These look like properties of the ak4613 to me, so put them in the
ak4613 node. If they are standard property names, then you just walk
the graph and get them.
>
> type = "sound";
> rcar_ak4613_port: endpoint {
> remote-endpoint = <&ak4613_port>;
> playback = <&ssi0 &src0 &dvc0>;
> capture = <&ssi1 &src1 &dvc1>;
Not really sure how you are using these to comment.
> };
> };
> 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>;
If you are trying to describe a connection between hdmi_snd0 and ssi2,
then do just that. Add a port to ssi2 and connect it to hdmi_snd0.
> };
> };
> 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
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