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From 06f794e8cb227249e03893e4b4923ff58556eb60 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Thu, 4 Mar 2021 14:49:23 +0000
Subject: [PATCH] ASoC: dwc: Support set_bclk_ratio
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
sound/soc/dwc/dwc-i2s.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -351,11 +351,46 @@ static int dw_i2s_set_fmt(struct snd_soc
return ret;
}
+static int dw_i2s_set_bclk_ratio(struct snd_soc_dai *cpu_dai,
+ unsigned int ratio)
+{
+ struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+ struct i2s_clk_config_data *config = &dev->config;
+
+ dev_err(dev->dev, "%s(%d)\n", __func__, ratio);
+ switch (ratio) {
+ case 32:
+ config->data_width = 16;
+ dev->ccr = 0x00;
+ dev->xfer_resolution = 0x02;
+ break;
+
+ case 48:
+ config->data_width = 24;
+ dev->ccr = 0x08;
+ dev->xfer_resolution = 0x04;
+ break;
+
+ case 64:
+ config->data_width = 32;
+ dev->ccr = 0x10;
+ dev->xfer_resolution = 0x05;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
+
+ return 0;
+}
+
static const struct snd_soc_dai_ops dw_i2s_dai_ops = {
.hw_params = dw_i2s_hw_params,
.prepare = dw_i2s_prepare,
.trigger = dw_i2s_trigger,
.set_fmt = dw_i2s_set_fmt,
+ .set_bclk_ratio = dw_i2s_set_bclk_ratio,
};
#ifdef CONFIG_PM
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