linux-kernel - Re: [PATCH v5 02/15] ASoC: sun4i-i2s: Add set_tdm

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Date:   Wed, 14 Aug 2019 10:30:11 +0100
From:   Mark Brown <broonie@...nel.org>
To:     codekipper@...il.com
Cc:     maxime.ripard@...e-electrons.com, wens@...e.org,
        linux-sunxi@...glegroups.com, linux-arm-kernel@...ts.infradead.org,
        lgirdwood@...il.com, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, be17068@...rbole.bo.it
Subject: Re: [PATCH v5 02/15] ASoC: sun4i-i2s: Add set_tdm_slot functionality

On Wed, Aug 14, 2019 at 08:08:41AM +0200, codekipper@...il.com wrote:
> From: Marcus Cooper <codekipper@...il.com>
> 
> Codecs without a control connection such as i2s based HDMI audio and
> the Pine64 DAC require a different amount of bit clocks per frame than

This isn't a universal property of CODECs without a control, and it's
something that CODECs with control can require too.

>  	return sun4i_i2s_set_clk_rate(dai, params_rate(params),
> -				      params_width(params));
> +				      i2s->tdm_slots ?
> +				      i2s->slot_width : params_width(params));

Please write normal conditional statements unless there's a strong
reason to do otherwise, it makes things more legible.

> +static int sun4i_i2s_set_dai_tdm_slot(struct snd_soc_dai *dai,
> +				      unsigned int tx_mask,
> +				      unsigned int rx_mask,
> +				      int slots, int width)
> +{
> +	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
> +
> +	i2s->tdm_slots = slots;
> +
> +	i2s->slot_width = width;
> +
> +	return 0;
> +}

No validation of the parameters here?

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