openwrt/target/linux/starfive/patches-6.6/0053-ASoC-dwc-i2s-Add-RX-master-support-for-StarFive-JH71.patch

From 1be9bd37fdb5f50162dba0158e1fee295ebca9aa Mon Sep 17 00:00:00 2001
From: Xingyu Wu <xingyu.wu@starfivetech.com>
Date: Tue, 17 Oct 2023 17:22:52 +0800
Subject: [PATCH 053/116] ASoC: dwc: i2s: Add RX master support for StarFive
 JH7110 SoC

Add JH7110 I2S RX master support, so the PDM can work on JH7110
EVB board.

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
---
 sound/soc/dwc/dwc-i2s.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -906,6 +906,27 @@ static int jh7110_i2srx_crg_init(struct
 	return jh7110_i2s_crg_slave_init(dev);
 }
 
+/* Special syscon initialization about RX channel with master mode on JH7110 SoC */
+static int jh7110_i2srx_mst_crg_init(struct dw_i2s_dev *dev)
+{
+	struct regmap *regmap;
+	unsigned int args[5];
+
+	regmap = syscon_regmap_lookup_by_phandle_args(dev->dev->of_node,
+						      "starfive,syscon",
+						      5, args);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev->dev, PTR_ERR(regmap), "getting the regmap failed\n");
+
+	/* Enable I2Srx with syscon register, args[0]: offset, args[1]: mask */
+	regmap_update_bits(regmap, args[0], args[1], args[1]);
+
+	/* Change I2Srx source (PDM) with syscon register, args[0]: offset, args[1]: mask */
+	regmap_update_bits(regmap, args[2], args[3], args[4]);
+
+	return jh7110_i2s_crg_master_init(dev);
+}
+
 static int jh7110_i2stx0_clk_cfg(struct i2s_clk_config_data *config)
 {
 	struct dw_i2s_dev *dev = container_of(config, struct dw_i2s_dev, config);
@@ -1086,11 +1107,21 @@ static const struct i2s_platform_data jh
 	.i2s_pd_init = jh7110_i2srx_crg_init,
 };
 
+static const struct i2s_platform_data jh7110_i2srx_mst_data = {
+	.cap = DWC_I2S_RECORD | DW_I2S_MASTER,
+	.channel = TWO_CHANNEL_SUPPORT,
+	.snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+	.snd_rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000,
+	.i2s_clk_cfg = jh7110_i2stx0_clk_cfg,
+	.i2s_pd_init = jh7110_i2srx_mst_crg_init,
+};
+
 static const struct of_device_id dw_i2s_of_match[] = {
 	{ .compatible = "snps,designware-i2s",	 },
 	{ .compatible = "starfive,jh7110-i2stx0", .data = &jh7110_i2stx0_data, },
 	{ .compatible = "starfive,jh7110-i2stx1", .data = &jh7110_i2stx1_data,},
 	{ .compatible = "starfive,jh7110-i2srx", .data = &jh7110_i2srx_data,},
+	{ .compatible = "starfive,jh7110-i2srx-master", .data = &jh7110_i2srx_mst_data,},
 	{},
 };