Hi Tzung-Bi,
Thanks for your reviewing,
On Wed, 2021-12-15 at 16:20 +0800, Tzung-Bi Shih wrote:
> On Wed, Dec 15, 2021 at 02:58:34PM +0800, Trevor Wu wrote:
> > --- a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1011-rt5682.c
> > +++ b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1011-rt5682.c
>
> [...]
> > +static int mt8195_set_bias_level_post(struct snd_soc_card *card,
> > + struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level
> > level)
> > +{
> > + struct snd_soc_component *component = dapm->component;
> > + struct mt8195_mt6359_rt1011_rt5682_priv *priv =
> > + snd_soc_card_get_drvdata(card);
> > + int ret = 0;
>
> ret doesn't need to be initialized.
>
Originally, I initailize "ret", because it will be returned at the end
of the function. To be concise, I will return 0 directly and remove the
initialization.
> > + /*
> > + * It's required to control mclk directly in the
> > set_bias_level_post
> > + * function for rt5682 and rt5682s codec, or the unexpected pop
> > happens
> > + * at the end of playback.
> > + */
> > + if (!component ||
> > + (strcmp(component->name, RT5682_DEV0_NAME) &&
> > + strcmp(component->name, RT5682S_DEV0_NAME)))
> > + return 0;
> > +
> > + if (IS_ERR(priv->i2so1_mclk))
> > + return 0;
>
> I doubt if it needs to check priv->i2so1_mclk. In other words, if
> IS_ERR(priv->i2so1_mclk) is true in _probe, does
> mt8195_set_bias_level_post() get called?
>
Now, i2so1_mclk is a required property.
I will remove the condition in v2.
> > + switch (level) {
> > + case SND_SOC_BIAS_OFF:
> > + if (!__clk_is_enabled(priv->i2so1_mclk))
> > + return 0;
> > +
> > + dev_dbg(card->dev, "Disable i2so1");
> > + clk_disable_unprepare(priv->i2so1_mclk);
>
> I would suggest move dev_dbg() later than clk_disable_unprepare()
> which means "Disable i2so1" is done.
>
OK.
> > + break;
> > + case SND_SOC_BIAS_ON:
> > + dev_dbg(card->dev, "Enable i2so1");
> > + ret = clk_prepare_enable(priv->i2so1_mclk);
> > + if (ret) {
> > + dev_err(card->dev, "Can't enable mclk, err:
> > %d\n", ret);
>
> The error message can be more specific. "Cannot enable i2so1" for
> example.
>
OK.
> > + return ret;
> > + }
>
> Also, I would suggest move dev_dbg() later than
> clk_prepare_enable(). Otherwise, it could fail to prepare or enable
> but still can see "Enable i2so1" message.
>
Yes, that's correct.
I will move it to a proper position.
> > + break;
> > + default:
> > + break;
> > + }
> > +
> > + return ret;
>
> The function doesn't use any gotos. To be concise, "return 0;".
OK.
>
> > @@ -1072,6 +1119,19 @@ static int
> > mt8195_mt6359_rt1011_rt5682_dev_probe(struct platform_device *pdev)
> > return -EINVAL;
> > }
> >
> > + priv->i2so1_mclk = devm_clk_get(&pdev->dev, "i2so1_mclk");
> > + if (IS_ERR(priv->i2so1_mclk)) {
> > + ret = PTR_ERR(priv->i2so1_mclk);
> > + if (ret == -ENOENT) {
> > + dev_dbg(&pdev->dev,
> > + "Failed to get i2so1_mclk, defer
> > probe\n");
> > + return -EPROBE_DEFER;
> > + }
>
> Does devm_clk_get_optional() could make the block more concise?
Even though we use devm_clk_get_optional, we still have to handle the
(-ENOENT) case in probe function. In my opinion, original
implementation could be kept.
>
> > +
> > + dev_err(&pdev->dev, "Failed to get i2so1_mclk,
> > err:%d\n", ret);
>
> If devm_clk_get() is possible to return -EPROBE_DEFER too, use
> dev_err_probe().
Ok.
>
> > --- a/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
> > +++ b/sound/soc/mediatek/mt8195/mt8195-mt6359-rt1019-rt5682.c
>
> [...]
> > +static int mt8195_set_bias_level_post(struct snd_soc_card *card,
> > + struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level
> > level)
> > +{
> > + struct snd_soc_component *component = dapm->component;
> > + struct mt8195_mt6359_rt1019_rt5682_priv *priv =
> > + snd_soc_card_get_drvdata(card);
> > + int ret = 0;
>
> Ditto, see comments above.
>
OK.
> > +
> > + /*
> > + * It's required to control mclk directly in the
> > set_bias_level_post
> > + * function for rt5682 and rt5682s codec, or the unexpected pop
> > happens
> > + * at the end of playback.
> > + */
> > + if (!component ||
> > + (strcmp(component->name, RT5682_DEV0_NAME) &&
> > + strcmp(component->name, RT5682S_DEV0_NAME)))
> > + return 0;
> > +
> > + if (IS_ERR(priv->i2so1_mclk))
> > + return 0;
>
> Ditto, see comments above.
>
OK.
> > +
> > + switch (level) {
> > + case SND_SOC_BIAS_OFF:
> > + if (!__clk_is_enabled(priv->i2so1_mclk))
> > + return 0;
> > +
> > + dev_dbg(card->dev, "Disable i2so1");
> > + clk_disable_unprepare(priv->i2so1_mclk);
> > + break;
> > + case SND_SOC_BIAS_ON:
> > + dev_dbg(card->dev, "Enable i2so1");
> > + ret = clk_prepare_enable(priv->i2so1_mclk);
> > + if (ret) {
> > + dev_err(card->dev, "Can't enable mclk, err:
> > %d\n", ret);
> > + return ret;
> > + }
> > + break;
> > + default:
> > + break;
> > + }
>
> Ditto, see comments above for the block.
>
OK.
> > +
> > + return ret;
>
> Ditto, see comments above.
>
OK.
> > @@ -1285,6 +1326,19 @@ static int
> > mt8195_mt6359_rt1019_rt5682_dev_probe(struct platform_device *pdev)
> > return -EINVAL;
> > }
> >
> > + priv->i2so1_mclk = devm_clk_get(&pdev->dev, "i2so1_mclk");
> > + if (IS_ERR(priv->i2so1_mclk)) {
> > + ret = PTR_ERR(priv->i2so1_mclk);
> > + if (ret == -ENOENT) {
> > + dev_dbg(&pdev->dev,
> > + "Failed to get i2so1_mclk, defer
> > probe\n");
> > + return -EPROBE_DEFER;
> > + }
> > +
> > + dev_err(&pdev->dev, "Failed to get i2so1_mclk,
> > err:%d\n", ret);
> > + return ret;
> > + }
>
> Ditto, see comments above for the block.
OK.
