[alsa-devel] [PATCH] ASoC: Route Mic Bias in Visstrim_M10 board.

[Javier Martin]

Visstrim_M10 board uses an external microphone
that can be enabled/disabled by the user.

Signed-off-by: Javier Martin <javier.martin at vista-silicon.com>
---
 sound/soc/imx/mx27vis-aic32x4.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/sound/soc/imx/mx27vis-aic32x4.c b/sound/soc/imx/mx27vis-aic32x4.c
index 054110b..7e55a99 100644
--- a/sound/soc/imx/mx27vis-aic32x4.c
+++ b/sound/soc/imx/mx27vis-aic32x4.c
@@ -74,6 +74,43 @@ static struct snd_soc_ops mx27vis_aic32x4_snd_ops = {
 	.hw_params	= mx27vis_aic32x4_hw_params,
 };
 
+static const struct snd_kcontrol_new mx27vis_aic32x4_controls[] = {
+	SOC_DAPM_PIN_SWITCH("External Mic"),
+};
+
+static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
+	SND_SOC_DAPM_MIC("External Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	{"Mic Bias", NULL, "External Mic"},
+	{"IN1_R", NULL, "Mic Bias"},
+	{"IN2_R", NULL, "Mic Bias"},
+	{"IN3_R", NULL, "Mic Bias"},
+	{"IN1_L", NULL, "Mic Bias"},
+	{"IN2_L", NULL, "Mic Bias"},
+	{"IN3_L", NULL, "Mic Bias"},
+};
+
+static int mx27vis_aic32x4_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	int err = 0;
+
+	snd_soc_dapm_new_controls(dapm, aic32x4_dapm_widgets,
+				  ARRAY_SIZE(aic32x4_dapm_widgets));
+
+	err = snd_soc_add_controls(codec, mx27vis_aic32x4_controls,
+				   ARRAY_SIZE(mx27vis_aic32x4_controls));
+	if (err < 0)
+		return err;
+
+	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
+
+	return 0;
+}
+
 static struct snd_soc_dai_link mx27vis_aic32x4_dai = {
 	.name		= "tlv320aic32x4",
 	.stream_name	= "TLV320AIC32X4",
@@ -82,6 +119,7 @@ static struct snd_soc_dai_link mx27vis_aic32x4_dai = {
 	.codec_name	= "tlv320aic32x4.0-0018",
 	.cpu_dai_name	= "imx-ssi.0",
 	.ops		= &mx27vis_aic32x4_snd_ops,
+	.init		= mx27vis_aic32x4_dai_init,
 };
 
 static struct snd_soc_card mx27vis_aic32x4 = {
-- 
1.7.0.4