linux-kernel - Re: [PATCH v6 3/3] ASoC: sun4i-i2s: Adjust LRCLK width

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Message-ID: <20190827070101.tastgcqvzrgv3kc5@flea>
Date:   Tue, 27 Aug 2019 09:01:01 +0200
From:   Maxime Ripard <mripard@...nel.org>
To:     codekipper@...il.com
Cc:     wens@...e.org, linux-sunxi@...glegroups.com,
        linux-arm-kernel@...ts.infradead.org, lgirdwood@...il.com,
        broonie@...nel.org, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, be17068@...rbole.bo.it
Subject: Re: [PATCH v6 3/3] ASoC: sun4i-i2s: Adjust LRCLK width

On Mon, Aug 26, 2019 at 08:07:34PM +0200, codekipper@...il.com wrote:
> From: Marcus Cooper <codekipper@...il.com>
>
> Some codecs such as i2s based HDMI audio and the Pine64 DAC require
> a different amount of bit clocks per frame than what is calculated
> by the sample width. Use the values obtained by the tdm slot bindings
> to adjust the LRCLK width accordingly.
>
> Signed-off-by: Marcus Cooper <codekipper@...il.com>
> ---
>  sound/soc/sunxi/sun4i-i2s.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> index 056a299c03fb..0965a97c96e5 100644
> --- a/sound/soc/sunxi/sun4i-i2s.c
> +++ b/sound/soc/sunxi/sun4i-i2s.c
> @@ -455,7 +455,10 @@ static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
>  		break;
>
>  	case SND_SOC_DAIFMT_I2S:
> -		lrck_period = params_physical_width(params);
> +		if (i2s->slot_width)
> +			lrck_period = i2s->slot_width;
> +		else
> +			lrck_period = params_physical_width(params);
>  		break;

That would be the case with the DSP formats too, right?

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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