[PATCH v2 05/12] ASoC: codecs: tx-macro: fix kcontrol put

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

tx_macro_tx_mixer_put() and tx_macro_dec_mode_put() currently returns zero
eventhough it changes the value.
Fix this, so that change notifications are sent correctly.

Fixes: d207bdea0ca9 ("ASoC: codecs: lpass-tx-macro: add dapm widgets and route")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/codecs/lpass-tx-macro.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index 5c03ef8d88b3..7f9370ed126f 100644
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -822,17 +822,23 @@ static int tx_macro_tx_mixer_put(struct snd_kcontrol *kcontrol,
 	struct tx_macro *tx = snd_soc_component_get_drvdata(component);
 
 	if (enable) {
+		if (tx->active_decimator[dai_id] == dec_id)
+			return 0;
+
 		set_bit(dec_id, &tx->active_ch_mask[dai_id]);
 		tx->active_ch_cnt[dai_id]++;
 		tx->active_decimator[dai_id] = dec_id;
 	} else {
+		if (tx->active_decimator[dai_id] == -1)
+			return 0;
+
 		tx->active_ch_cnt[dai_id]--;
 		clear_bit(dec_id, &tx->active_ch_mask[dai_id]);
 		tx->active_decimator[dai_id] = -1;
 	}
 	snd_soc_dapm_mixer_update_power(widget->dapm, kcontrol, enable, update);
 
-	return 0;
+	return 1;
 }
 
 static int tx_macro_enable_dec(struct snd_soc_dapm_widget *w,
@@ -1018,9 +1024,12 @@ static int tx_macro_dec_mode_put(struct snd_kcontrol *kcontrol,
 	int path = e->shift_l;
 	struct tx_macro *tx = snd_soc_component_get_drvdata(component);
 
+	if (tx->dec_mode[path] == value)
+		return 0;
+
 	tx->dec_mode[path] = value;
 
-	return 0;
+	return 1;
 }
 
 static int tx_macro_get_bcs(struct snd_kcontrol *kcontrol,
-- 
2.21.0