linux-kernel - Re: [PATCH v1 0/3] db845c/rb3: add i2s playback support

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Message-ID: <ec802f7f-9570-468f-9c30-d5d460c5af28@sirena.org.uk>
Date: Thu, 5 Dec 2024 12:08:29 +0000
From: Mark Brown <broonie@...nel.org>
To: Alexey Klimov <alexey.klimov@...aro.org>
Cc: konradybcio@...nel.org, andersson@...nel.org,
	srinivas.kandagatla@...aro.org, tiwai@...e.com, lgirdwood@...il.com,
	perex@...ex.cz, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, dmitry.baryshkov@...aro.org,
	linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 0/3] db845c/rb3: add i2s playback support

On Thu, Dec 05, 2024 at 02:33:41AM +0000, Alexey Klimov wrote:

> There are i2s signals provided in low-speed connector on such boards
> as required by 96boards spec. Looks like it is possible to actually
> playback something via these pins after adding missing parts here
> and there.

> I tested simple widely available cheap DACs like UDA1334 and PCM5102A
> and they works just fine without need for mclk. I guess any DAC that
> can handle 48 kHz and 16bit will do.

> In theory db845 can work without mezzanine board and this provides
> one more use-case to playback sound and not all mezzanines have cosy
> audio connectors.

I would expect that when something is connected to the DAI there would
also be a DT update describing that CODEC and it's parameters.

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