linux-kernel - Re: [PATCH v2 2/7] ASoC: fsl_rpmsg: Add CPU DAI driver for audio base on rpmsg

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Message-ID: <20210222134650.GD6127@sirena.org.uk>
Date:   Mon, 22 Feb 2021 13:46:50 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Shengjiu Wang <shengjiu.wang@...il.com>
Cc:     Shengjiu Wang <shengjiu.wang@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, alsa-devel@...a-project.org,
        Timur Tabi <timur@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linuxppc-dev@...ts.ozlabs.org, Xiubo Li <Xiubo.Lee@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Takashi Iwai <tiwai@...e.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Fabio Estevam <festevam@...il.com>
Subject: Re: [PATCH v2 2/7] ASoC: fsl_rpmsg: Add CPU DAI driver for audio
 base on rpmsg

On Thu, Feb 18, 2021 at 03:57:11PM +0800, Shengjiu Wang wrote:

> Can I add a flag:
> "rpmsg->mclk_streams & BIT(substream->stream)"
> for avoiding multiple calls of hw_params function before enabling
> clock?

Yes, if you do local refcounting that'd avoid the issue.

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