[PATCH] ASoC: imx-rpmsg: Support configure sysclk for codec dai

[PATCH] ASoC: imx-rpmsg: Support configure sysclk for codec dai

[Shengjiu Wang]

Some codecs need to configure the sysclk even with slave
mode, otherwise it may not work properly with some case.

wm8960 is the one that need sysclk be configured, so add
late_probe() to call the snd_soc_dai_set_sysclk() of codec

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/fsl/imx-rpmsg.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c
index 2e117311e582..bef4bd997c98 100644
--- a/sound/soc/fsl/imx-rpmsg.c
+++ b/sound/soc/fsl/imx-rpmsg.c
@@ -19,6 +19,7 @@
 struct imx_rpmsg {
 	struct snd_soc_dai_link dai;
 	struct snd_soc_card card;
+	unsigned int sysclk;
 };
 
 static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
@@ -28,6 +29,27 @@ static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
 	SND_SOC_DAPM_MIC("Main MIC", NULL),
 };
 
+static int imx_rpmsg_late_probe(struct snd_soc_card *card)
+{
+	struct imx_rpmsg *data = snd_soc_card_get_drvdata(card);
+	struct snd_soc_pcm_runtime *rtd = list_first_entry(&card->rtd_list,
+							   struct snd_soc_pcm_runtime, list);
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	struct device *dev = card->dev;
+	int ret;
+
+	if (!data->sysclk)
+		return 0;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, data->sysclk, SND_SOC_CLOCK_IN);
+	if (ret && ret != -ENOTSUPP) {
+		dev_err(dev, "failed to set sysclk in %s\n", __func__);
+		return ret;
+	}
+
+	return 0;
+}
+
 static int imx_rpmsg_probe(struct platform_device *pdev)
 {
 	struct snd_soc_dai_link_component *dlc;
@@ -72,12 +94,18 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
 		data->dai.codecs->dai_name = "snd-soc-dummy-dai";
 		data->dai.codecs->name = "snd-soc-dummy";
 	} else {
+		struct clk *clk;
+
 		data->dai.codecs->of_node = args.np;
 		ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
 		if (ret) {
 			dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
 			goto fail;
 		}
+
+		clk = devm_get_clk_from_child(&pdev->dev, args.np, NULL);
+		if (!IS_ERR(clk))
+			data->sysclk = clk_get_rate(clk);
 	}
 
 	data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
@@ -103,6 +131,7 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
 	data->card.owner = THIS_MODULE;
 	data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
 	data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
+	data->card.late_probe = imx_rpmsg_late_probe;
 	/*
 	 * Inoder to use common api to get card name and audio routing.
 	 * Use parent of_node for this device, revert it after finishing using
-- 
2.34.1

Re: [PATCH] ASoC: imx-rpmsg: Support configure sysclk for codec dai

[Nicolin Chen]

On Mon, Aug 1, 2022 at 5:42 AM Shengjiu Wang <shengjiu.wang@nxp.com> wrote:

>  struct imx_rpmsg {
>         struct snd_soc_dai_link dai;
>         struct snd_soc_card card;
> +       unsigned int sysclk;

unsigned long?

Re: [PATCH] ASoC: imx-rpmsg: Support configure sysclk for codec dai

[Mark Brown]

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On Tue, Aug 02, 2022 at 08:23:37PM +0800, Shengjiu Wang wrote:
> On Tue, Aug 2, 2022 at 1:47 AM Nicolin Chen <nicoleotsuka@gmail.com> wrote:
> > On Mon, Aug 1, 2022 at 5:42 AM Shengjiu Wang <shengjiu.wang@nxp.com>
> > wrote:

> > >  struct imx_rpmsg {
> > >         struct snd_soc_dai_link dai;
> > >         struct snd_soc_card card;
> > > +       unsigned int sysclk;

> > unsigned long?

> Seems int or long are all used in the kernel.
> I am not sure which one is better?

clk_get_rate() and clk_set_rate() do use unsigned long, but on a lot of
architectures that is the same size as int so it makes little practical
difference though it would be more correct to use an unsigned long.

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Re: [PATCH] ASoC: imx-rpmsg: Support configure sysclk for codec dai

[Mark Brown]

On Mon, 1 Aug 2022 20:26:13 +0800, Shengjiu Wang wrote:
> Some codecs need to configure the sysclk even with slave
> mode, otherwise it may not work properly with some case.
> 
> wm8960 is the one that need sysclk be configured, so add
> late_probe() to call the snd_soc_dai_set_sysclk() of codec
> 
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: imx-rpmsg: Support configure sysclk for codec dai
      commit: 088f115c6ff664c8afe003bd542e1e662a72aaed

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark