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

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Date:   Mon, 22 Apr 2019 03:15:34 +0000
From:   "S.j. Wang" <shengjiu.wang@....com>
To:     Nicolin Chen <nicoleotsuka@...il.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

Hi

> 
> 
> 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.

I add this for may be in the future we forget the limitation. Just for a reminder.

Best regards
Wang shengjiu
> 
> > +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.