openwrt/target/linux/layerscape/patches-5.4/801-audio-0071-MLK-21957-2-ASoC-fsl_sai-read-SAI-version-and-params.patch

From 34a1cd97a2ef6f68a12ff2f2fd813548e867f72f Mon Sep 17 00:00:00 2001
From: Viorel Suman <viorel.suman@nxp.com>
Date: Thu, 20 Jun 2019 13:25:15 +0300
Subject: [PATCH] MLK-21957-2: ASoC: fsl_sai: read SAI version and params in
 probe

Read SAI IP version and parameters in probe function.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
---
 sound/soc/fsl/fsl_sai.c | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -465,11 +465,12 @@ static int fsl_sai_set_dai_fmt(struct sn
 	return ret;
 }
 
-static int fsl_sai_check_ver(struct snd_soc_dai *cpu_dai)
+static int fsl_sai_check_ver(struct device *dev)
 {
-	struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
+	struct fsl_sai *sai = dev_get_drvdata(dev);
 	unsigned char offset = sai->soc->reg_offset;
 	unsigned int val;
+	int ret;
 
 	if (FSL_SAI_TCSR(offset) == FSL_SAI_VERID)
 		return 0;
@@ -477,16 +478,21 @@ static int fsl_sai_check_ver(struct snd_
 	if (sai->verid.loaded)
 		return 0;
 
-	sai->verid.loaded = true;
-	regmap_read(sai->regmap, FSL_SAI_VERID, &val);
-	dev_dbg(cpu_dai->dev, "VERID: 0x%016X\n", val);
+	ret = regmap_read(sai->regmap, FSL_SAI_VERID, &val);
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(dev, "VERID: 0x%016X\n", val);
 
 	sai->verid.id = (val & FSL_SAI_VER_ID_MASK) >> FSL_SAI_VER_ID_SHIFT;
 	sai->verid.extfifo_en = (val & FSL_SAI_VER_EFIFO_EN);
 	sai->verid.timestamp_en = (val & FSL_SAI_VER_TSTMP_EN);
 
-	regmap_read(sai->regmap, FSL_SAI_PARAM, &val);
-	dev_dbg(cpu_dai->dev, "PARAM: 0x%016X\n", val);
+	ret = regmap_read(sai->regmap, FSL_SAI_PARAM, &val);
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(dev, "PARAM: 0x%016X\n", val);
 
 	/* max slots per frame, power of 2 */
 	sai->param.spf = 1 <<
@@ -499,11 +505,13 @@ static int fsl_sai_check_ver(struct snd_
 	/* number of datalines implemented */
 	sai->param.dln = val & FSL_SAI_PAR_DLN_MASK;
 
-	dev_dbg(cpu_dai->dev,
+	dev_dbg(dev,
 		"Version: 0x%08X, SPF: %u, WPF: %u, DLN: %u\n",
 		sai->verid.id, sai->param.spf, sai->param.wpf, sai->param.dln
 	);
 
+	sai->verid.loaded = true;
+
 	return 0;
 }
 
@@ -521,8 +529,6 @@ static int fsl_sai_set_bclk(struct snd_s
 	if (sai->slave_mode[tx])
 		return 0;
 
-	fsl_sai_check_ver(dai);
-
 	for (id = 0; id < FSL_SAI_MCLK_MAX; id++) {
 		clk_rate = clk_get_rate(sai->mclk_clk[id]);
 		if (!clk_rate)
@@ -1520,6 +1526,10 @@ static int fsl_sai_probe(struct platform
 
 	platform_set_drvdata(pdev, sai);
 
+	ret = fsl_sai_check_ver(&pdev->dev);
+	if (ret < 0)
+		dev_warn(&pdev->dev, "Error reading SAI version: %d\n", ret);
+
 	pm_runtime_enable(&pdev->dev);
 
 	regcache_cache_only(sai->regmap, true);