linux-kernel - Re: [PATCH 1/2] ASoC: imx-akcodec: Add imx-akcodec machine driver

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Date:   Sat, 8 May 2021 19:11:04 +0800
From:   Shengjiu Wang <shengjiu.wang@...il.com>
To:     Marco Felsch <m.felsch@...gutronix.de>
Cc:     Shengjiu Wang <shengjiu.wang@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, alsa-devel@...a-project.org,
        Timur Tabi <timur@...nel.org>, Xiubo Li <Xiubo.Lee@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Takashi Iwai <tiwai@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Mark Brown <broonie@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] ASoC: imx-akcodec: Add imx-akcodec machine driver

Hi

On Tue, May 4, 2021 at 2:59 PM Marco Felsch <m.felsch@...gutronix.de> wrote:
>
> On 21-04-23 13:51, Shengjiu Wang wrote:
> > Add machine driver for i.MX boards that have
> > AK4458/AK5558/AK4497/AK5552 DAC/ADC attached to
> > SAI interface.
>
> Why? Does simple-audio-card don't fit?

No.  We need to support asrc->sai->codec case,
but simple-audio-card don't support it. simple-audio-card
needs the cpu dai is dummy on BE. And we need to
support the DSD format, this driver help to switch
the dai fmt from pdm to i2s according to the DSD or non-DSD.

best regards
wang shengjiu