linux-kernel - Re: [linux-sunxi] [PATCH 01/16] ASoC: sun4i-i2s: Add support for H6 I2S

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Date:   Fri, 10 Jul 2020 20:43:05 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Jernej Škrabec <jernej.skrabec@...l.net>,
        peron.clem@...il.com, Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Marcus Cooper <codekipper@...il.com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [PATCH 01/16] ASoC: sun4i-i2s: Add support for H6
 I2S

Jernej,

On 7/10/20 2:22 PM, Jernej Škrabec wrote:
>> From the description in the manual, this looks off by one. The number of
>> BCLKs per LRCK is LRCK_PERIOD + 1.
> 
> Are you sure? Macro SUN8I_I2S_FMT0_LRCK_PERIOD() is defined as follows:
> 
> #define SUN8I_I2S_FMT0_LRCK_PERIOD(period)	((period - 1) << 8)
> 
> which already lowers value by 1.

No, sorry, I had missed the subtraction happening in the macro. So there's no
problem here.

Thanks,
Samuel