linux-kernel - Re: [PATCH 1/2] ASoC: sunxi: Add Allwinner H6 Digital MIC driver

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Date:   Tue, 15 Jun 2021 14:22:07 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Ban Tao <fengzheng923@...il.com>
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        mripard@...nel.org, wens@...e.org, jernej.skrabec@...il.com,
        p.zabel@...gutronix.de, samuel@...lland.org, krzk@...nel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 1/2] ASoC: sunxi: Add Allwinner H6 Digital MIC driver

On Tue, Jun 15, 2021 at 09:03:26PM +0800, Ban Tao wrote:

Other than a few small things this looks good:

> +M:	Ban Tao <fengzheng923@...il.com>
> +L:	alsa-devel@...a-project.org (moderated for non-subscribers)
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml
> +F:	sound/soc/sunxi/sun50i-dmic.c

Not the binding document?

> @@ -0,0 +1,408 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * ALSA SoC DMIC Audio Layer
> + *
> + * Copyright 2021 Ban Tao <fengzheng923@...il.com>
> + *

Please make the entire comment a C++ one so things look more
intentional.

> +static void sun50i_snd_rxctrl_enable(struct snd_pcm_substream *substream,
> +				    struct sun50i_dmic_dev *host, bool enable)
> +{
> +	if (enable) {

> +	} else {

> +static int sun50i_dmic_trigger(struct snd_pcm_substream *substream, int cmd,
> +			       struct snd_soc_dai *dai)
> +{
> +	int ret = 0;
> +	struct sun50i_dmic_dev *host = snd_soc_dai_get_drvdata(dai);
> +
> +	if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
> +		return -EINVAL;
> +
> +	switch (cmd) {
> +	case SNDRV_PCM_TRIGGER_START:
> +	case SNDRV_PCM_TRIGGER_RESUME:
> +	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
> +		sun50i_snd_rxctrl_enable(substream, host, true);
> +		break;
> +
> +	case SNDRV_PCM_TRIGGER_STOP:
> +	case SNDRV_PCM_TRIGGER_SUSPEND:
> +	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
> +		sun50i_snd_rxctrl_enable(substream, host, false);
> +		break;

This is the only caller of _rxctrl_enable() and _rxctrl_enable() shares
no code between the two cases - just inline _rxctrl_enable() here, it's
clearer what's going on.

> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	base = devm_ioremap_resource(&pdev->dev, res);

devm_platform_ioremap_resource()

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