layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 801-audio-0030-MLK-15960-2-ASoC-fsl_sai-refine-the-pm-runtime-funct.patch

diff --git a/target/linux/layerscape/patches-5.4/801-audio-0030-MLK-15960-2-ASoC-fsl_sai-refine-the-pm-runtime-funct.patch b/target/linux/layerscape/patches-5.4/801-audio-0030-MLK-15960-2-ASoC-fsl_sai-refine-the-pm-runtime-funct.patch
new file mode 100644 (file)
index 0000000..5232a69
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/801-audio-0030-MLK-15960-2-ASoC-fsl_sai-refine-the-pm-runtime-funct.patch
@@ -0,0 +1,36 @@
+From 136762e82a9c4974c15b0525245092d11a825cee Mon Sep 17 00:00:00 2001
+From: Shengjiu Wang <shengjiu.wang@freescale.com>
+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 <shengjiu.wang@freescale.com>
+---
+ 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
+@@ -1096,6 +1096,8 @@ 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,
+                       &fsl_sai_dai, 1);
+       if (ret)
+@@ -1139,6 +1141,8 @@ 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]]);
+