From 136762e82a9c4974c15b0525245092d11a825cee Mon Sep 17 00:00:00 2001 From: Shengjiu Wang Date: Wed, 12 Jul 2017 18:00:58 +0800 Subject: [PATCH] MLK-15960-2: ASoC: fsl_sai: refine the pm runtime function In imx8qm/imx8qxp, the power domain of IP is enabled when pm_runtime_get_sync() is called, and disabled when pm_runtime _put_sync() is called. when power domain is disabled, the value of registers will lost, so we need to use the regcache_sync() to restore the registers in fsl_sai_runtime_resume. Signed-off-by: Shengjiu Wang --- sound/soc/fsl/fsl_sai.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -1097,6 +1097,8 @@ static int fsl_sai_probe(struct platform pm_runtime_enable(&pdev->dev); + regcache_cache_only(sai->regmap, true); + ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, &sai->cpu_dai_drv, 1); if (ret) @@ -1140,6 +1142,8 @@ static int fsl_sai_runtime_suspend(struc { struct fsl_sai *sai = dev_get_drvdata(dev); + regcache_cache_only(sai->regmap, true); + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]);