ASoC: wm5110: Power both channels for differential mono output

On the wm5110 CODEC both the left and right channel must be powered
when an output is being used as a mono output, although no audio is
routed to the right output channel. This patch adds additional DAPM
routes to link the right channel to the left in the case where an output
is marked as mono. Audio must always be brought in on the left channel
for mono operation.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 29e198f57d4c..747c71e59c04 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -243,6 +243,31 @@ int arizona_init_spk(struct snd_soc_codec *codec)
 }
 EXPORT_SYMBOL_GPL(arizona_init_spk);
 
+static const struct snd_soc_dapm_route arizona_mono_routes[] = {
+	{ "OUT1R", NULL, "OUT1L" },
+	{ "OUT2R", NULL, "OUT2L" },
+	{ "OUT3R", NULL, "OUT3L" },
+	{ "OUT4R", NULL, "OUT4L" },
+	{ "OUT5R", NULL, "OUT5L" },
+	{ "OUT6R", NULL, "OUT6L" },
+};
+
+int arizona_init_mono(struct snd_soc_codec *codec)
+{
+	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+	struct arizona *arizona = priv->arizona;
+	int i;
+
+	for (i = 0; i < ARIZONA_MAX_OUTPUT; ++i) {
+		if (arizona->pdata.out_mono[i])
+			snd_soc_dapm_add_routes(&codec->dapm,
+						&arizona_mono_routes[i], 1);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(arizona_init_mono);
+
 int arizona_init_gpio(struct snd_soc_codec *codec)
 {
 	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);