Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20200927192912.46323-1-peron.clem@gmail.com> <20200927192912.46323-4-peron.clem@gmail.com>
 <CAGb2v67gFTrGVs3pw5ospdSoogaA15cbuWjPQK=-Z2f4nMd9Rw@mail.gmail.com>
In-Reply-To: <CAGb2v67gFTrGVs3pw5ospdSoogaA15cbuWjPQK=-Z2f4nMd9Rw@mail.gmail.com>
From:   Chen-Yu Tsai <wens@csie.org>
Date:   Mon, 28 Sep 2020 13:02:12 +0800
Message-ID: <CAGb2v65c2NzjxN4FSksvzQKOvZz0e9ccsKT9OuLpmUVr_WNtzQ@mail.gmail.com>
Subject: Re: [linux-sunxi] [PATCH v5 03/20] ASoC: sun4i-i2s: Change get_sr()
 and get_wss() to be more explicit
To:     =?UTF-8?B?Q2zDqW1lbnQgUMOpcm9u?= <peron.clem@gmail.com>
Cc:     Maxime Ripard <mripard@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Brown <broonie@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Marcus Cooper <codekipper@gmail.com>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Linux-ALSA <alsa-devel@alsa-project.org>,
        devicetree <devicetree@vger.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        linux-sunxi <linux-sunxi@googlegroups.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8BIT
Precedence: bulk

On Mon, Sep 28, 2020 at 12:37 PM Chen-Yu Tsai <wens@csie.org> wrote:
>
> On Mon, Sep 28, 2020 at 3:29 AM Clément Péron <peron.clem@gmail.com> wrote:
> >
> > We are actually using a complex formula to just return a bunch of
> > simple values. Also this formula is wrong for sun4i when calling

BTW, it is entirely possible that the compiler optimizes your switch-case
back into the original complex formula you replaced. :)

> > get_wss() the function return 4 instead of 3.
> >
> > Replace this with a simpler switch case.
> >
> > Also drop the i2s params which is unused and return a simple int as
> > returning an error code could be out of range for an s8 and there is
> > no optim to return a s8 here.
> >
> > Signed-off-by: Clément Péron <peron.clem@gmail.com>
>
> Fixes: 619c15f7fac9 ("ASoC: sun4i-i2s: Change SR and WSS computation")
>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>