linux-kernel - [PATCH 1/2] ASoC: fsl-asoc-card: Support configuring dai fmt from DT

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Date:   Tue, 21 Jul 2020 11:41:49 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] ASoC: fsl-asoc-card: Support configuring dai fmt from DT

Support same propeties as simple card for configuring fmt
from DT.
In order to make this change compatible with old DT, these
properties are optional.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 sound/soc/fsl/fsl-asoc-card.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index ee80d02b56c6..4848ba61d083 100644
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -531,11 +531,14 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 	struct device_node *cpu_np, *codec_np, *asrc_np;
 	struct device_node *np = pdev->dev.of_node;
 	struct platform_device *asrc_pdev = NULL;
+	struct device_node *bitclkmaster = NULL;
+	struct device_node *framemaster = NULL;
 	struct platform_device *cpu_pdev;
 	struct fsl_asoc_card_priv *priv;
 	struct device *codec_dev = NULL;
 	const char *codec_dai_name;
 	const char *codec_dev_name;
+	unsigned int daifmt;
 	u32 width;
 	int ret;
 
@@ -667,6 +670,31 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 		goto asrc_fail;
 	}
 
+	/* Format info from DT is optional. */
+	daifmt = snd_soc_of_parse_daifmt(np, NULL,
+					 &bitclkmaster, &framemaster);
+	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
+	if (bitclkmaster || framemaster) {
+		if (codec_np == bitclkmaster)
+			daifmt |= (codec_np == framemaster) ?
+				SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
+		else
+			daifmt |= (codec_np == framemaster) ?
+				SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
+
+		/* Override dai_fmt with value from DT */
+		priv->dai_fmt = daifmt;
+	}
+
+	/* Change direction according to format */
+	if (priv->dai_fmt & SND_SOC_DAIFMT_CBM_CFM) {
+		priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_IN;
+		priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_IN;
+	}
+
+	of_node_put(bitclkmaster);
+	of_node_put(framemaster);
+
 	if (!fsl_asoc_card_is_ac97(priv) && !codec_dev) {
 		dev_err(&pdev->dev, "failed to find codec device\n");
 		ret = -EPROBE_DEFER;
-- 
2.27.0