linux-kernel - Re: [PATCH 4/7] ASoC: imx-audio-rpmsg: Add rpmsg

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Message-ID: <20210205142516.GC4720@sirena.org.uk>
Date:   Fri, 5 Feb 2021 14:25:16 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, linuxppc-dev@...ts.ozlabs.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 4/7] ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio
 channel

On Fri, Feb 05, 2021 at 02:57:27PM +0800, Shengjiu Wang wrote:

> +	/* TYPE C is notification from M core */
> +	if (r_msg->header.type == MSG_TYPE_C) {
> +		if (r_msg->header.cmd == TX_PERIOD_DONE) {

> +		} else if (r_msg->header.cmd == RX_PERIOD_DONE) {

A switch statement would be clearer and more extensible...

> +	/* TYPE B is response msg */
> +	if (r_msg->header.type == MSG_TYPE_B) {
> +		memcpy(&info->r_msg, r_msg, sizeof(struct rpmsg_r_msg));
> +		complete(&info->cmd_complete);
> +	}

...and make this flow clearer for example.  Do we need to warn on
unknown messages?

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