linux-kernel - Re: [PATCH V5 2/3] ASoC: fsl_asrc: replace the process

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Message-ID: <20190422025715.GB9768@Asurada>
Date:   Sun, 21 Apr 2019 19:57:19 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     "S.j. Wang" <shengjiu.wang@....com>
Cc:     "timur@...nel.org" <timur@...nel.org>,
        "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "festevam@...il.com" <festevam@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V5 2/3] ASoC: fsl_asrc: replace the process_option table
 with function

On Mon, Apr 22, 2019 at 02:32:35AM +0000, S.j. Wang wrote:
> When we want to support more sample rate, for example 12kHz/24kHz
> we need update the process_option table, if we want to support more
> sample rate next time, the table need to be updated again. which
> is not flexible.
> 
> We got a function fsl_asrc_sel_proc to replace the table, which can
> give the pre-processing and post-processing options according to
> the sample rate.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

A couple of more small comments.

And please add this when you resend:
Acked-by: Nicolin Chen <nicoleotsuka@...il.com>

> + * Unsupport cases: Tsout > 8.125 * Tsin, Tsout > 16.125 * Tsin

Since we have a ratio validation somewhere else, it's okay to
drop this line -- it may confuse people since the function no
longer checks these unsupported cases.

> +static int fsl_asrc_sel_proc(int inrate, int outrate,

I think "void" type should be just fine as we made sure there
is no unsupported cases running in this function.