linux-kernel - Re: [PATCH 1/2] ASoC: qcom: sdm845: handle soundwire stream

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Message-ID: <fcf845bd-9803-ab04-d2a9-c258ddfcc972@linaro.org>
Date:   Wed, 18 Mar 2020 15:57:38 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        broonie@...nel.org
Cc:     alsa-devel@...a-project.org, lgirdwood@...il.com, perex@...ex.cz,
        linux-kernel@...r.kernel.org, vkoul@...nel.org
Subject: Re: [PATCH 1/2] ASoC: qcom: sdm845: handle soundwire stream



On 18/03/2020 15:26, Pierre-Louis Bossart wrote:
> 
> Same comment, how does the notion of cpu_dai come in the picture for a 
> SoundWire dailink?
> Would you mind listing what the components of the dailinks are?

dais that I was referring here are all codec dais from backend-dai.

Device tree entries from
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/arm64/boot/dts/qcom/sdm845-db845c.dts?h=next-20200318#n538


Frontend-dai:
	mm1-dai-link {
		link-name = "MultiMedia1";
		cpu {
			sound-dai = <&q6asmdai  MSM_FRONTEND_DAI_MULTIMEDIA1>;
		};
	};

Backend-dai:
	slim-dai-link {
		link-name = "SLIM Playback";
		cpu {
			sound-dai = <&q6afedai SLIMBUS_0_RX>;
		};

		platform {
			sound-dai = <&q6routing>;
		};

		codec {
			sound-dai =  <&left_spkr>, <&right_spkr>, <&swm 0>, <&wcd9340 0>;
		};
	};


--srini