37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 136762e82a9c4974c15b0525245092d11a825cee Mon Sep 17 00:00:00 2001
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From: Shengjiu Wang <shengjiu.wang@freescale.com>
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Date: Wed, 12 Jul 2017 18:00:58 +0800
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Subject: [PATCH] MLK-15960-2: ASoC: fsl_sai: refine the pm runtime function
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In imx8qm/imx8qxp, the power domain of IP is enabled when
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pm_runtime_get_sync() is called, and disabled when pm_runtime
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_put_sync() is called. when power domain is disabled, the value
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of registers will lost, so we need to use the regcache_sync()
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to restore the registers in fsl_sai_runtime_resume.
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Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
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---
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sound/soc/fsl/fsl_sai.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/sound/soc/fsl/fsl_sai.c
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+++ b/sound/soc/fsl/fsl_sai.c
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@@ -1098,6 +1098,8 @@ static int fsl_sai_probe(struct platform
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pm_runtime_enable(&pdev->dev);
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+ regcache_cache_only(sai->regmap, true);
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+
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ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
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&sai->cpu_dai_drv, 1);
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if (ret)
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@@ -1141,6 +1143,8 @@ static int fsl_sai_runtime_suspend(struc
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{
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struct fsl_sai *sai = dev_get_drvdata(dev);
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+ regcache_cache_only(sai->regmap, true);
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+
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if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE))
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clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]);
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