[alsa-devel] [PATCH RFC v4 4/6] ASoC: Add multiple CPU DAI support in DAPM

[Bard Liao]

From: Shreyas NC <shreyas.nc at intel.com>

DAPM handles DAIs during soc_dapm_stream_event() and during addition
and creation of DAI widgets i.e., dapm_add_valid_dai_widget() and
dapm_connect_dai_link_widgets().

Extend these functions to handle multiple cpu dai.

Signed-off-by: Vinod Koul <vkoul at kernel.org>
Signed-off-by: Shreyas NC <shreyas.nc at intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
Signed-off-by: Bard Liao <yung-chuan.liao at linux.intel.com>
---
 sound/soc/soc-dapm.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 1a414054ee23..af4ddca8b7f3 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -4358,9 +4358,19 @@ static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
 	struct snd_soc_dai *codec_dai;
 	int i;
 
-	for_each_rtd_codec_dai(rtd, i, codec_dai)
-		dapm_add_valid_dai_widget(card, rtd,
-					  codec_dai, rtd->cpu_dais[0]);
+	if (rtd->num_cpus == 1) {
+		for_each_rtd_codec_dai(rtd, i, codec_dai)
+			dapm_add_valid_dai_widget(card, rtd, codec_dai,
+						  rtd->cpu_dais[0]);
+	} else if (rtd->num_codecs == rtd->num_cpus) {
+		for_each_rtd_codec_dai(rtd, i, codec_dai)
+			dapm_add_valid_dai_widget(card, rtd, codec_dai,
+						  rtd->cpu_dais[i]);
+	} else {
+		dev_err(card->dev,
+			"N cpus to M codecs link is not supported yet\n");
+	}
+
 }
 
 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
@@ -4424,9 +4434,11 @@ static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
 	int event)
 {
 	struct snd_soc_dai *codec_dai;
+	struct snd_soc_dai *cpu_dai;
 	int i;
 
-	soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		soc_dapm_dai_stream_event(codec_dai, stream, event);
 
-- 
2.17.1