[alsa-devel] Applied "ASoC: compress: Add pm_runtime support" to the asoc tree

[Mark Brown]

The patch

   ASoC: compress: Add pm_runtime support

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.6

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4137f4b65df7608e52f307f4aa9792b984bad7de Mon Sep 17 00:00:00 2001
From: Cezary Rojewski <cezary.rojewski at intel.com>
Date: Tue, 17 Dec 2019 10:58:50 +0100
Subject: [PATCH] ASoC: compress: Add pm_runtime support

For some devices, components need to be powered-up before stream startup
sequence commences. Update soc_compr_open to provide such functionality.
Based on soc_pcm_open. Adjust soc_compr_free accordingly to power down
components once compress stream is closed.

Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
Link: https://lore.kernel.org/r/20191217095851.19629-7-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/soc-compress.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 6615ef64c7f5..b2a5351b1a11 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -19,6 +19,7 @@
 #include <sound/soc.h>
 #include <sound/initval.h>
 #include <sound/soc-dpcm.h>
+#include <linux/pm_runtime.h>
 
 static int soc_compr_components_open(struct snd_compr_stream *cstream,
 				     struct snd_soc_component **last)
@@ -72,10 +73,20 @@ static int soc_compr_components_free(struct snd_compr_stream *cstream,
 static int soc_compr_open(struct snd_compr_stream *cstream)
 {
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
-	struct snd_soc_component *component;
+	struct snd_soc_component *component, *save = NULL;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	int ret;
 
+	for_each_rtd_components(rtd, rtdcom, component) {
+		ret = pm_runtime_get_sync(component->dev);
+		if (ret < 0 && ret != -EACCES) {
+			pm_runtime_put_noidle(component->dev);
+			save = component;
+			goto pm_err;
+		}
+	}
+
 	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 
 	if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
@@ -115,6 +126,14 @@ static int soc_compr_open(struct snd_compr_stream *cstream)
 		cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
 out:
 	mutex_unlock(&rtd->card->pcm_mutex);
+pm_err:
+	for_each_rtd_components(rtd, rtdcom, component) {
+		if (component == save)
+			break;
+		pm_runtime_mark_last_busy(component->dev);
+		pm_runtime_put_autosuspend(component->dev);
+	}
+
 	return ret;
 }
 
@@ -239,6 +258,8 @@ static void close_delayed_work(struct snd_soc_pcm_runtime *rtd)
 static int soc_compr_free(struct snd_compr_stream *cstream)
 {
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	int stream;
@@ -287,6 +308,12 @@ static int soc_compr_free(struct snd_compr_stream *cstream)
 	}
 
 	mutex_unlock(&rtd->card->pcm_mutex);
+
+	for_each_rtd_components(rtd, rtdcom, component) {
+		pm_runtime_mark_last_busy(component->dev);
+		pm_runtime_put_autosuspend(component->dev);
+	}
+
 	return 0;
 }
 
-- 
2.20.1