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From:   Fabio Estevam <festevam@gmail.com>
Date:   Fri, 8 Mar 2019 13:16:04 -0300
Message-ID: <CAOMZO5CLjZ7W0Z4ZHbx1YXMxjH5RzjEQPxPtP4Sd+ANF_eyG+g@mail.gmail.com>
Subject: Re: [PATCH] ASoC: fsl: sai: Reduce underrun when stream starts
To:     Daniel Baluta <daniel.baluta@nxp.com>
Cc:     "broonie@kernel.org" <broonie@kernel.org>,
        "tiwai@suse.com" <tiwai@suse.com>,
        "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Xiubo.Lee@gmail.com" <Xiubo.Lee@gmail.com>,
        "nicoleotsuka@gmail.com" <nicoleotsuka@gmail.com>,
        dl-linux-imx <linux-imx@nxp.com>,
        "S.j. Wang" <shengjiu.wang@nxp.com>
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Hi Daniel,

On Fri, Mar 8, 2019 at 1:09 PM Daniel Baluta <daniel.baluta@nxp.com> wrote:
>
> From: Shengjiu Wang <shengjiu.wang@nxp.com>
>
> Write initial words into SAI FIFO to reduce the underrun
> error.

Please provide a better explanation.

Why does performing these writes help?

Also, the commit message says "reduce", so it seems this is a
workaround instead of a proper fix?