ASoC: cs47l15: Fix event generation for low power mux control

cs47l15_in1_adc_put always returns zero regardless of if the control
value was updated. This results in missing notifications to user-space
of the control change. Update the handling to return 1 when the value is
changed.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220623105120.1981154-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/cs47l15.c b/sound/soc/codecs/cs47l15.c
index 391fd7da331fd2d8eda9a0b0ae61bf63c42b2f6e..1c7d52bef8935beae1518972529f09d2f92ce210 100644 (file)
--- a/sound/soc/codecs/cs47l15.c
+++ b/sound/soc/codecs/cs47l15.c
@@ -122,6 +122,9 @@ static int cs47l15_in1_adc_put(struct snd_kcontrol *kcontrol,
                snd_soc_kcontrol_component(kcontrol);
        struct cs47l15 *cs47l15 = snd_soc_component_get_drvdata(component);
 
+       if (!!ucontrol->value.integer.value[0] == cs47l15->in1_lp_mode)
+               return 0;
+
        switch (ucontrol->value.integer.value[0]) {
        case 0:
                /* Set IN1 to normal mode */
@@ -150,7 +153,7 @@ static int cs47l15_in1_adc_put(struct snd_kcontrol *kcontrol,
                break;
        }
 
-       return 0;
+       return 1;
 }
 
 static const struct snd_kcontrol_new cs47l15_snd_controls[] = {