[PATCH 2/4] ASoC: intel: baytrail: don't use snd_soc_rtdcom_lookup()

[Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>]

From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

We shouldn't use snd_soc_rtdcom_lookup() as much as possible.
It works today, but, will not work in the future if we support multi
CPU/Codec/Platform, because 1 rtd might have multiple same driver
named component.

intel baytrail driver is using it, but we can avoid it easily
by having component pointer at sst_byt_pcm_data.
This patch removes snd_soc_rtdcom_lookup() from this driver.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
 sound/soc/intel/baytrail/sst-baytrail-pcm.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/sound/soc/intel/baytrail/sst-baytrail-pcm.c b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
index 53383055c8dc..dbd830375bc4 100644
--- a/sound/soc/intel/baytrail/sst-baytrail-pcm.c
+++ b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
@@ -36,6 +36,7 @@ static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
 /* private data for each PCM DSP stream */
 struct sst_byt_pcm_data {
 	struct sst_byt_stream *stream;
+	struct snd_soc_component *component;
 	struct snd_pcm_substream *substream;
 	struct mutex mutex;
 
@@ -119,12 +120,11 @@ static int sst_byt_pcm_hw_params(struct snd_soc_component *component,
 	return 0;
 }
 
-static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
+static int sst_byt_pcm_restore_stream_context(struct sst_byt_pcm_data *pcm_data)
 {
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+	struct snd_soc_pcm_runtime *rtd = pcm_data->substream->private_data;
+	struct snd_soc_component *component = pcm_data->component;
 	struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
-	struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 	struct sst_byt *byt = pdata->byt;
 	int ret;
 
@@ -149,7 +149,7 @@ static void sst_byt_pcm_work(struct work_struct *work)
 		container_of(work, struct sst_byt_pcm_data, work);
 
 	if (snd_pcm_running(pcm_data->substream))
-		sst_byt_pcm_restore_stream_context(pcm_data->substream);
+		sst_byt_pcm_restore_stream_context(pcm_data);
 }
 
 static int sst_byt_pcm_trigger(struct snd_soc_component *component,
@@ -198,7 +198,7 @@ static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
 	struct snd_pcm_substream *substream = pcm_data->substream;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+	struct snd_soc_component *component = pcm_data->component;
 	struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 	struct sst_byt *byt = pdata->byt;
 	u32 pos, hw_pos;
@@ -242,6 +242,7 @@ static int sst_byt_pcm_open(struct snd_soc_component *component,
 	mutex_lock(&pcm_data->mutex);
 
 	pcm_data->substream = substream;
+	pcm_data->component = component;
 
 	snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
 
-- 
2.17.1