linux-kernel - [PATCH] ASoC: qcom: Fix for DMA interrupt clear reg overwriting

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Date:   Thu,  3 Jun 2021 10:35:30 +0530
From:   Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, rohitkr@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, judyhsiao@...omium.org
Cc:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Subject: [PATCH] ASoC: qcom: Fix for DMA interrupt clear reg overwriting

This patch fixes the DMA interrupt registers overwriting
issue in lpass platform interrupt handler.

Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
---
 sound/soc/qcom/lpass-platform.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index 0df9481ea4c6..e02caa121fa4 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -526,7 +526,7 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
 			return -EINVAL;
 		}
 
-		ret = regmap_write(map, reg_irqclr, val_irqclr);
+		ret = regmap_update_bits(map, reg_irqclr, val_irqclr, val_irqclr);
 		if (ret) {
 			dev_err(soc_runtime->dev, "error writing to irqclear reg: %d\n", ret);
 			return ret;
@@ -650,7 +650,7 @@ static irqreturn_t lpass_dma_interrupt_handler(
 	struct lpass_variant *v = drvdata->variant;
 	irqreturn_t ret = IRQ_NONE;
 	int rv;
-	unsigned int reg = 0, val = 0;
+	unsigned int reg = 0, val = 0, val_clr = 0, val_mask = 0;
 	struct regmap *map;
 	unsigned int dai_id = cpu_dai->driver->id;
 
@@ -676,8 +676,9 @@ static irqreturn_t lpass_dma_interrupt_handler(
 	return -EINVAL;
 	}
 	if (interrupts & LPAIF_IRQ_PER(chan)) {
-
-		rv = regmap_write(map, reg, LPAIF_IRQ_PER(chan) | val);
+		val_clr = (LPAIF_IRQ_PER(chan) | val);
+		val_mask = LPAIF_IRQ_ALL(chan);
+		rv = regmap_update_bits(map, reg, val_mask, val_clr);
 		if (rv) {
 			dev_err(soc_runtime->dev,
 				"error writing to irqclear reg: %d\n", rv);
@@ -688,7 +689,9 @@ static irqreturn_t lpass_dma_interrupt_handler(
 	}
 
 	if (interrupts & LPAIF_IRQ_XRUN(chan)) {
-		rv = regmap_write(map, reg, LPAIF_IRQ_XRUN(chan) | val);
+		val_clr = (LPAIF_IRQ_XRUN(chan) | val);
+		val_mask = LPAIF_IRQ_ALL(chan);
+		rv = regmap_update_bits(map, reg, val_mask, val_clr);
 		if (rv) {
 			dev_err(soc_runtime->dev,
 				"error writing to irqclear reg: %d\n", rv);
@@ -700,7 +703,9 @@ static irqreturn_t lpass_dma_interrupt_handler(
 	}
 
 	if (interrupts & LPAIF_IRQ_ERR(chan)) {
-		rv = regmap_write(map, reg, LPAIF_IRQ_ERR(chan) | val);
+		val_clr = (LPAIF_IRQ_ERR(chan) | val);
+		val_mask = LPAIF_IRQ_ALL(chan);
+		rv = regmap_update_bits(map, reg, val_mask, val_clr);
 		if (rv) {
 			dev_err(soc_runtime->dev,
 				"error writing to irqclear reg: %d\n", rv);
-- 
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is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.