[alsa-devel] [PATCH v2] ASoC: sun4i-i2s: move code from startup/shutdown hooks into pm_runtime hooks

[Vasily Khoruzhick]

startup() and shutdown() hooks are called for both substreams,
so stopping either substream when another is running breaks the
latter.

E.g. playback breaks if capture is stopped when playback is running.

Move code from startup() and shutdown() to resume() and suspend()
hooks respectively to fix this issue

Signed-off-by: Vasily Khoruzhick <anarsoul at gmail.com>
---
v2: - rename from "ASoC: sun4i-i2s: don't try to start up
                 or shut down DAI if it's active"
    - move code from startup/shutdown hooks into pm_runtime

 sound/soc/sunxi/sun4i-i2s.c | 61 +++++++++++++++----------------------
 1 file changed, 25 insertions(+), 36 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index a4aa931ebfae..daa6c08cffbc 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -644,40 +644,6 @@ static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	return 0;
 }
 
-static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
-			     struct snd_soc_dai *dai)
-{
-	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-
-	/* Enable the whole hardware block */
-	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
-			   SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
-
-	/* Enable the first output line */
-	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
-			   SUN4I_I2S_CTRL_SDO_EN_MASK,
-			   SUN4I_I2S_CTRL_SDO_EN(0));
-
-
-	return clk_prepare_enable(i2s->mod_clk);
-}
-
-static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
-			       struct snd_soc_dai *dai)
-{
-	struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-
-	clk_disable_unprepare(i2s->mod_clk);
-
-	/* Disable our output lines */
-	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
-			   SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
-
-	/* Disable the whole hardware block */
-	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
-			   SUN4I_I2S_CTRL_GL_EN, 0);
-}
-
 static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
 				unsigned int freq, int dir)
 {
@@ -695,8 +661,6 @@ static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
 	.hw_params	= sun4i_i2s_hw_params,
 	.set_fmt	= sun4i_i2s_set_fmt,
 	.set_sysclk	= sun4i_i2s_set_sysclk,
-	.shutdown	= sun4i_i2s_shutdown,
-	.startup	= sun4i_i2s_startup,
 	.trigger	= sun4i_i2s_trigger,
 };
 
@@ -869,6 +833,21 @@ static int sun4i_i2s_runtime_resume(struct device *dev)
 		goto err_disable_clk;
 	}
 
+	/* Enable the whole hardware block */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
+
+	/* Enable the first output line */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_SDO_EN_MASK,
+			   SUN4I_I2S_CTRL_SDO_EN(0));
+
+	ret = clk_prepare_enable(i2s->mod_clk);
+	if (ret) {
+		dev_err(dev, "Failed to enable module clock\n");
+		goto err_disable_clk;
+	}
+
 	return 0;
 
 err_disable_clk:
@@ -880,6 +859,16 @@ static int sun4i_i2s_runtime_suspend(struct device *dev)
 {
 	struct sun4i_i2s *i2s = dev_get_drvdata(dev);
 
+	clk_disable_unprepare(i2s->mod_clk);
+
+	/* Disable our output lines */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
+
+	/* Disable the whole hardware block */
+	regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+			   SUN4I_I2S_CTRL_GL_EN, 0);
+
 	regcache_cache_only(i2s->regmap, true);
 
 	clk_disable_unprepare(i2s->bus_clk);
-- 
2.19.0