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SubjectRe: [PATCH] ASoC: fsl_asrc: Add an option to select internal ratio mode
On Tue, Jun 30, 2020 at 8:38 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi Shengjiu,
>
> On Mon, Jun 29, 2020 at 11:10 AM Shengjiu Wang <shengjiu.wang@nxp.com> wrote:
>
> > +/**
>
> "/**" notation may confuse 'make htmldocs". Since this is a single
> line comment you could do:
>
> /* Select proper clock source for internal ratio mode */
>
>
> > + * Select proper clock source for internal ratio mode
> > + */
> > +static int fsl_asrc_select_clk(struct fsl_asrc_priv *asrc_priv,
> > + struct fsl_asrc_pair *pair,
> > + int in_rate,
> > + int out_rate)
> > +{
> > + struct fsl_asrc_pair_priv *pair_priv = pair->private;
> > + struct asrc_config *config = pair_priv->config;
> > + int rate[2], select_clk[2]; /* Array size 2 means IN and OUT */
> > + int clk_rate, clk_index;
> > + int i = 0, j = 0;
> > + bool clk_sel[2];
> > +
> > + rate[0] = in_rate;
> > + rate[1] = out_rate;
> > +
> > + /* Select proper clock source for internal ratio mode */
> > + for (j = 0; j < 2; j++) {
> > + for (i = 0; i < ASRC_CLK_MAP_LEN; i++) {
> > + clk_index = asrc_priv->clk_map[j][i];
> > + clk_rate = clk_get_rate(asrc_priv->asrck_clk[clk_index]);
> > + if (clk_rate != 0 && (clk_rate / rate[j]) <= 1024 &&
> > + (clk_rate % rate[j]) == 0)
> > + break;
> > + }
> > +
> > + if (i == ASRC_CLK_MAP_LEN) {
> > + select_clk[j] = OUTCLK_ASRCK1_CLK;
> > + clk_sel[j] = false;
> > + } else {
> > + select_clk[j] = i;
> > + clk_sel[j] = true;
> > + }
> > + }
> > +
> > + /* Switch to ideal ratio mode if there is no proper clock source */
> > + if (!clk_sel[IN] || !clk_sel[OUT])
> > + select_clk[IN] = INCLK_NONE;
> > +
> > + config->inclk = select_clk[IN];
> > + config->outclk = select_clk[OUT];
> > +
> > + return 0;
>
> This new function always returns 0. Should it be converted to 'void'
> type instead?
>
> > + ret = fsl_asrc_select_clk(asrc_priv, pair,
> > + config.input_sample_rate,
> > + config.output_sample_rate);
> > + if (ret) {
> > + dev_err(dai->dev, "fail to select clock\n");
>
> fsl_asrc_select_clk() does not return error, so you could skip the
> error checking.

ok, will update the patch

best regards
wang shengjiu

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