linux-kernel - [PATCH v2] Asoc: qcom: lpass-cpu: Fix clock disable failure

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Date:   Mon, 19 Oct 2020 14:36:03 +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
Cc:     V Sujith Kumar Reddy <vsujithk@...eaurora.org>,
        Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Subject: [PATCH v2] Asoc: qcom: lpass-cpu: Fix clock disable failure

From: V Sujith Kumar Reddy <vsujithk@...eaurora.org>

Disable MI2S bit clock from PAUSE/STOP/SUSPEND usecase instead of
shutdown time. Acheive this by invoking clk_disable API from
cpu daiops trigger instead of cpu daiops shutdown.
Change non-atomic API "clk_prepare_enable" to atomic API
"clk_enable" in trigger, as trigger is being called from atomic context.

Fixes: commit 7e6799d8f87d ("ASoC: qcom: lpass-cpu: Enable MI2S BCLK and LRCLK together")

Signed-off-by: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
---
 sound/soc/qcom/lpass-cpu.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 78de888..6001049 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -80,6 +80,12 @@ static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
 		dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
 		return ret;
 	}
+	ret = clk_prepare(drvdata->mi2s_bit_clk[dai->driver->id]);
+	if (ret) {
+		dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
+		clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+		return ret;
+	}
 	return 0;
 }
 
@@ -88,9 +94,8 @@ static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
 {
 	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 
-	clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
-
 	clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+	clk_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
 }
 
 static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
@@ -303,10 +308,10 @@ static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
 			dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
 				ret);
 
-		ret = clk_prepare_enable(drvdata->mi2s_bit_clk[id]);
+		ret = clk_enable(drvdata->mi2s_bit_clk[id]);
 		if (ret) {
 			dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
-			clk_disable_unprepare(drvdata->mi2s_osr_clk[id]);
+			clk_disable(drvdata->mi2s_osr_clk[id]);
 			return ret;
 		}
 
@@ -324,6 +329,7 @@ static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
 		if (ret)
 			dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
 				ret);
+		clk_disable(drvdata->mi2s_bit_clk[dai->driver->id]);
 		break;
 	}
 
-- 
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