linux-kernel - Re: [RFC PATCH] ASoC: simple-card: Use dai

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Date:   Wed, 22 Nov 2023 03:39:02 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Daniel Baluta <daniel.baluta@...il.com>
Cc:     Daniel Baluta <daniel.baluta@....nxp.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "iuliana.prodan@....com" <iuliana.prodan@....com>,
        "shengjiu.wang@....com" <shengjiu.wang@....com>
Subject: Re: [RFC PATCH] ASoC: simple-card: Use dai_id from node description


Hi Daniel

> > But hmm... in your case, you need to setup 2ports, and use 2nd port
> > is assumed approach.
> > Why you don't setup full port ? Do you have some reason ??
(snip)
> Now, I want to write a DTS description where my DAI link uses
> Component 0 (CPU) (with its DAI index 1) connected with Component 1
> (codec) (with its DAI index 0).

Thank you for indicating your DTS.

So in imx8m_dai case, it has total 3 DAIs, and you want to use reg = 1.
In such case, your DTS need to have like below, if my understanding was
correct.

	dsp: dsp@...e8000 {
		ports {
			     port@0 { reg = <0>;         endpoint { /* not used */ };  };
			cpu: port@1 { reg = <1>; cpu_ep: endpoint { remote-endpoint = <xxx>; }; };
			     port@2 { reg = <2>;         endpoint { /* not used */ };  };
		};
	};


Thank you for your help !!

Best regards
---
Kuninori Morimoto