openwrt/target/linux/layerscape/patches-5.4/801-audio-0049-MLK-17580-ASoC-fsl-sai-check-for-pinctrl-status.patch

From 12b887445779c33285dac5279fc02fd80e0800d8 Mon Sep 17 00:00:00 2001
From: Viorel Suman <viorel.suman@nxp.com>
Date: Fri, 9 Mar 2018 12:41:42 +0200
Subject: [PATCH] MLK-17580: ASoC: fsl: sai: check for pinctrl status

For some cases (like AMIX) pinctrl may be null - this
breaks SAI functionality. Enforce pinctrl null pointer
checking prior calling any function which involves
pins state changes.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
---
 sound/soc/fsl/fsl_sai.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -530,14 +530,17 @@ static int fsl_sai_hw_params(struct snd_
 
 	pins = DIV_ROUND_UP(channels, slots);
 	sai->is_dsd = fsl_is_dsd(params);
-	sai->pins_state = fsl_get_pins_state(sai->pinctrl, params);
 
-	if (!IS_ERR_OR_NULL(sai->pins_state)) {
-		ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
-		if (ret) {
-			dev_err(cpu_dai->dev,
-				"failed to set proper pins state: %d\n", ret);
-			return ret;
+	if (!IS_ERR_OR_NULL(sai->pinctrl)) {
+		sai->pins_state = fsl_get_pins_state(sai->pinctrl, params);
+
+		if (!IS_ERR_OR_NULL(sai->pins_state)) {
+			ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
+			if (ret) {
+				dev_err(cpu_dai->dev,
+					"failed to set proper pins state: %d\n", ret);
+				return ret;
+			}
 		}
 	}
 
@@ -920,7 +923,7 @@ static int fsl_sai_dai_resume(struct snd
 	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
 	int ret;
 
-	if (!IS_ERR_OR_NULL(sai->pins_state)) {
+	if (!IS_ERR_OR_NULL(sai->pinctrl) && !IS_ERR_OR_NULL(sai->pins_state)) {
 		ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
 		if (ret) {
 			dev_err(cpu_dai->dev,
@@ -1346,7 +1349,7 @@ static int fsl_sai_probe(struct platform
 	sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;
 	sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;
 
-	sai->pinctrl  = devm_pinctrl_get(&pdev->dev);
+	sai->pinctrl = devm_pinctrl_get(&pdev->dev);
 
 	platform_set_drvdata(pdev, sai);