[alsa-devel] [PATCH 3/4] ASoC: SOF: add helper to check if we should enter d0i3 suspend

[Pierre-Louis Bossart]

From: Keyon Jie <yang.jie at linux.intel.com>

Add helper to check if the DSP should be put in D0i3. This function
returns true if a stream has ignored the SUSPEND trigger to keep the
pipelines running in the DSP.

Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/core.c     | 13 +++++++++++++
 sound/soc/sof/sof-priv.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c
index 8661c2cca76b..805918d3bcc0 100644
--- a/sound/soc/sof/core.c
+++ b/sound/soc/sof/core.c
@@ -132,6 +132,19 @@ struct snd_sof_dai *snd_sof_find_dai(struct snd_sof_dev *sdev,
 	return NULL;
 }
 
+bool snd_sof_dsp_d0i3_on_suspend(struct snd_sof_dev *sdev)
+{
+	struct snd_sof_pcm *spcm;
+
+	list_for_each_entry(spcm, &sdev->pcm_list, list) {
+		if (spcm->stream[SNDRV_PCM_STREAM_PLAYBACK].suspend_ignored ||
+		    spcm->stream[SNDRV_PCM_STREAM_CAPTURE].suspend_ignored)
+			return true;
+	}
+
+	return false;
+}
+
 /*
  * FW Panic/fault handling.
  */
diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h
index 6408ac88a3e5..c7c2c70ee4d0 100644
--- a/sound/soc/sof/sof-priv.h
+++ b/sound/soc/sof/sof-priv.h
@@ -553,6 +553,8 @@ struct snd_sof_pcm *snd_sof_find_spcm_dai(struct snd_sof_dev *sdev,
 	return NULL;
 }
 
+bool snd_sof_dsp_d0i3_on_suspend(struct snd_sof_dev *sdev);
+
 struct snd_sof_pcm *snd_sof_find_spcm_name(struct snd_sof_dev *sdev,
 					   const char *name);
 struct snd_sof_pcm *snd_sof_find_spcm_comp(struct snd_sof_dev *sdev,
-- 
2.20.1