From: Phil Elwell <phil@raspberrypi.com>
Date: Wed, 3 Jan 2024 14:43:43 +0000 (+0000)
Subject: ASoC: dwc: Defer bclk_ratio handling to hw_params
X-Git-Tag: accepted/tizen/unified/20240422.153132~171
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fd3ab4d68398c858275c7273baa5bf5e0e6137c7;p=platform%2Fkernel%2Flinux-rpi.git

ASoC: dwc: Defer bclk_ratio handling to hw_params

bclk_ratio is only a factor in clock producer mode, and needs to
override the default value of num_channels * sample_size.
Move the bclk_ratio handling into the hw_params method, only latching
the value in set_bclk_ratio, to address both of those matters.

See: https://github.com/raspberrypi/linux/issues/5817

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---

diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c
index 11cd83b..fcb1ccc 100644
--- a/sound/soc/dwc/dwc-i2s.c
+++ b/sound/soc/dwc/dwc-i2s.c
@@ -314,6 +314,25 @@ static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
 	if (dev->tdm_slots)
 		config->data_width = 32;
 
+	if ((dev->capability & DW_I2S_MASTER) && dev->bclk_ratio) {
+		switch (dev->bclk_ratio) {
+		case 32:
+			dev->ccr = 0x00;
+			break;
+
+		case 48:
+			dev->ccr = 0x08;
+			break;
+
+		case 64:
+			dev->ccr = 0x10;
+			break;
+
+		default:
+			return -EINVAL;
+		}
+	}
+
 	config->chan_nr = params_channels(params);
 
 	switch (config->chan_nr) {
@@ -537,23 +556,7 @@ static int dw_i2s_set_bclk_ratio(struct snd_soc_dai *cpu_dai,
 
 	dev_dbg(dev->dev, "%s(%d)\n", __func__, ratio);
 
-	switch (ratio) {
-	case 32:
-		dev->ccr = 0x00;
-		break;
-
-	case 48:
-		dev->ccr = 0x08;
-		break;
-
-	case 64:
-		dev->ccr = 0x10;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
+	dev->bclk_ratio = ratio;
 
 	return 0;
 }
@@ -1068,6 +1071,7 @@ static int dw_i2s_probe(struct platform_device *pdev)
 		}
 	}
 
+	dev->bclk_ratio = 0;
 	dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
 	dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
 	if (pdata) {
diff --git a/sound/soc/dwc/local.h b/sound/soc/dwc/local.h
index 6b08979..9f21eb6 100644
--- a/sound/soc/dwc/local.h
+++ b/sound/soc/dwc/local.h
@@ -128,6 +128,7 @@ struct dw_i2s_dev {
 	unsigned int quirks;
 	unsigned int i2s_reg_comp1;
 	unsigned int i2s_reg_comp2;
+	unsigned int bclk_ratio;
 	struct device *dev;
 	u32 ccr;
 	u32 xfer_resolution;