[alsa-devel] [RFC PATCH 10/11] soundwire: intel: do sdw stream setup in setup function

[Pierre-Louis Bossart]

From: Rander Wang <rander.wang at linux.intel.com>

The sdw stream is allocated and stored in dai to share
the sdw runtime information.

Signed-off-by: Rander Wang <rander.wang at linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 drivers/soundwire/intel.c | 57 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 1 deletion(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index f3764f67919e..336203303480 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -670,6 +670,58 @@ static int intel_post_bank_switch(struct sdw_bus *bus)
  * DAI routines
  */
 
+static int sdw_stream_setup(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct sdw_stream_runtime *sdw_stream = NULL;
+	char *name;
+	int i, ret;
+
+	name = kzalloc(32, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		snprintf(name, 32, "%s-Playback", dai->name);
+	else
+		snprintf(name, 32, "%s-Capture", dai->name);
+
+	sdw_stream = sdw_alloc_stream(name);
+	if (!sdw_stream) {
+		dev_err(dai->dev, "alloc stream failed for DAI %s", dai->name);
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	/* Set stream pointer on CPU DAI */
+	ret = snd_soc_dai_set_sdw_stream(dai, sdw_stream, substream->stream);
+	if (ret < 0) {
+		dev_err(dai->dev, "failed to set stream pointer on cpu dai %s",
+			dai->name);
+		goto release_stream;
+	}
+
+	/* Set stream pointer on all CODEC DAIs */
+	for (i = 0; i < rtd->num_codecs; i++) {
+		ret = snd_soc_dai_set_sdw_stream(rtd->codec_dais[i], sdw_stream,
+						 substream->stream);
+		if (ret < 0) {
+			dev_err(dai->dev, "failed to set stream pointer on codec dai %s",
+				rtd->codec_dais[i]->name);
+			goto release_stream;
+		}
+	}
+
+	return 0;
+
+release_stream:
+	sdw_release_stream(sdw_stream);
+error:
+	kfree(name);
+	return ret;
+}
+
 static int intel_startup(struct snd_pcm_substream *substream,
 			 struct snd_soc_dai *dai)
 {
@@ -682,9 +734,11 @@ static int intel_startup(struct snd_pcm_substream *substream,
 				    "pm_runtime_get_sync failed in %s, ret %d\n",
 				    __func__, ret);
 		pm_runtime_put_noidle(cdns->dev);
+
+		return ret;
 	}
 
-	return ret;
+	return sdw_stream_setup(substream, dai);
 }
 
 static int intel_hw_params(struct snd_pcm_substream *substream,
@@ -885,6 +939,7 @@ static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
 };
 
 static const struct snd_soc_dai_ops intel_pdm_dai_ops = {
+	.startup = intel_startup,
 	.hw_params = intel_hw_params,
 	.prepare = intel_prepare,
 	.trigger = intel_trigger,
-- 
2.20.1