linux-kernel - Re: [PATCH 09/15] ASoC: mediatek: mt8186: support tdm in platform driver

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Date:   Thu, 17 Feb 2022 21:59:43 +0800
From:   Jiaxin Yu <jiaxin.yu@...iatek.com>
To:     Mark Brown <broonie@...nel.org>
CC:     <lgirdwood@...il.com>, <tiwai@...e.com>, <robh+dt@...nel.org>,
        <matthias.bgg@...il.com>, <perex@...ex.cz>,
        <p.zabel@...gutronix.de>, <geert+renesas@...der.be>,
        <trevor.wu@...iatek.com>, <tzungbi@...gle.com>,
        <zhangqilong3@...wei.com>, <alsa-devel@...a-project.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/15] ASoC: mediatek: mt8186: support tdm in platform
 driver

On Fri, 2022-02-11 at 15:24 +0000, Mark Brown wrote:
> On Fri, Feb 11, 2022 at 06:38:12PM +0800, Jiaxin Yu wrote:
> 
> Again, mostly looks good just fairly small and easily fixable issues:
> 
> > +static int mtk_tdm_hd_en_event(struct snd_soc_dapm_widget *w,
> > +			       struct snd_kcontrol *kcontrol,
> > +			       int event)
> > +{
> > +	struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w-
> > >dapm);
> > +
> > +	dev_info(cmpnt->dev, "%s(), name %s, event 0x%x\n",
> > +		 __func__, w->name, event);
> > +
> > +	return 0;
> > +}
> 
> This does nothing, you can just remove it.

Yes, this is readlly useless, removed it in the v2 version.

> 
> > +	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
> > +	case SND_SOC_DAIFMT_NB_NF:
> > +		tdm_priv->bck_invert = TDM_BCK_NON_INV;
> > +		tdm_priv->lck_invert = TDM_LCK_NON_INV;
> > +		break;
> > +	case SND_SOC_DAIFMT_NB_IF:
> > +		tdm_priv->bck_invert = TDM_BCK_NON_INV;
> > +		tdm_priv->lck_invert = TDM_LCK_INV;
> > +		break;
> > +	case SND_SOC_DAIFMT_IB_NF:
> > +		tdm_priv->bck_invert = TDM_BCK_INV;
> > +		tdm_priv->lck_invert = TDM_LCK_NON_INV;
> > +		break;
> > +	case SND_SOC_DAIFMT_IB_IF:
> > +	default:
> > +		tdm_priv->bck_invert = TDM_BCK_INV;
> > +		tdm_priv->lck_invert = TDM_LCK_INV;
> 
> You should return an error in the default case rather than just
> picking
> one of the behaviours to help spot any configuration errors.

Done in the v2 version.

> 
> > +	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
> > +	case SND_SOC_DAIFMT_CBM_CFM:
> > +		tdm_priv->slave_mode = false;
> > +		break;
> > +	case SND_SOC_DAIFMT_CBS_CFS:
> > +		tdm_priv->slave_mode = true;
> 
> We're trying to move away from these defines and the master/slave
> terminology to talk about clock providers instead - the new defines
> are
> _PROVIDER_MASK, _DAIFMT_CBP_CFP and _DAIFMT_CBC_CFC.

Done in the v2 version.