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Date:   Wed, 6 May 2020 10:33:23 +0800
From:   Shengjiu Wang <>
To:     Mark Brown <>
Cc:     Shengjiu Wang <>,
        Linux-ALSA <>,
        Timur Tabi <>, Xiubo Li <>,
        Liam Girdwood <>,, Takashi Iwai <>,
        Nicolin Chen <>,
        Rob Herring <>,
        Fabio Estevam <>,
        linux-kernel <>
Subject: Re: [PATCH 2/3] ASoC: fsl_esai: Add support for imx8qm


On Fri, May 1, 2020 at 6:23 PM Mark Brown <> wrote:
> On Fri, May 01, 2020 at 04:12:05PM +0800, Shengjiu Wang wrote:
> > The difference for esai on imx8qm is that DMA device is EDMA.
> >
> > EDMA requires the period size to be multiple of maxburst. Otherwise
> > the remaining bytes are not transferred and thus noise is produced.
> If this constraint comes from the DMA controller then normally you'd
> expect the DMA controller integration to be enforcing this - is there no
> information in the DMA API that lets us know that this constraint is
> there?

No, I can't find one API for this.
Do you have a recommendation?

best regards
wang shengjiu

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