linux-kernel - Re: [PATCH v4 02/22] ASoC: sun4i-i2s: Change set_chan

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Message-ID: <CAJiuCce0thGcH19vMtDX0X8-9S32Y7kC2bnWo_6-SHozF8uDAA@mail.gmail.com>
Date:   Mon, 21 Sep 2020 19:15:13 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Marcus Cooper <codekipper@...il.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Samuel Holland <samuel@...lland.org>
Subject: Re: [PATCH v4 02/22] ASoC: sun4i-i2s: Change set_chan_cfg() params

Hi Maxime,

On Mon, 21 Sep 2020 at 14:29, Maxime Ripard <maxime@...no.tech> wrote:
>
> On Mon, Sep 21, 2020 at 12:27:11PM +0200, Clément Péron wrote:
> > As slots and slot_width can be overwritter in case set_tdm() is
> > called. Avoid to have this logic in set_chan_cfg().
> >
> > Instead pass the required values as params to set_chan_cfg().
>
> It's not really clear here what the issue is, and how passing the slots
> and slot_width as arguments addresses it
>
> > This also fix a bug when i2s->slot_width is set for TDM but not
> > properly used in set_chan_cfg().
>
> Which bug?

Do you mean my commit log is too short or is it a real question to understand ?

To answer if set_tdm() is called then we set the i2s->slot_width and i2s->slots.
But we use lrck_period = params_physical_width(params)
instead of lrck_period = i2s->slot_width ?  i2s->slot_width :
params_physical_width(params);

>
> Also, Fixes tag?

I think this only happens when 20/24bit is enabled so the issue has been
introduced in this series.

Clement

>
> Thanks!
> Maxime