From a1aee7f7b71155595a06f21f2d021b6a58d04017 Mon Sep 17 00:00:00 2001 From: Shuming Fan Date: Thu, 22 Apr 2021 18:32:35 +0800 Subject: ASoC: rt711-sdca: add the notification when volume changed This patch adds the return value when the volume settings were changed. The userspace application might monitor the kcontrols to check which control changed. Signed-off-by: Shuming Fan Link: https://lore.kernel.org/r/20210422103235.22048-1-shumingf@realtek.com Signed-off-by: Mark Brown --- sound/soc/codecs/rt711-sdca.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/soc/codecs/rt711-sdca.c b/sound/soc/codecs/rt711-sdca.c index 39848d2641c3..cc36739f7fcf 100644 --- a/sound/soc/codecs/rt711-sdca.c +++ b/sound/soc/codecs/rt711-sdca.c @@ -509,12 +509,16 @@ static int rt711_sdca_set_gain_put(struct snd_kcontrol *kcontrol, (struct soc_mixer_control *)kcontrol->private_value; struct rt711_sdca_priv *rt711 = snd_soc_component_get_drvdata(component); unsigned int read_l, read_r, gain_l_val, gain_r_val; - unsigned int i, adc_vol_flag = 0; + unsigned int i, adc_vol_flag = 0, changed = 0; + unsigned int lvalue, rvalue; if (strstr(ucontrol->id.name, "FU1E Capture Volume") || strstr(ucontrol->id.name, "FU0F Capture Volume")) adc_vol_flag = 1; + regmap_read(rt711->mbq_regmap, mc->reg, &lvalue); + regmap_read(rt711->mbq_regmap, mc->rreg, &rvalue); + /* control value to 2's complement value */ /* L Channel */ gain_l_val = ucontrol->value.integer.value[0]; @@ -560,6 +564,11 @@ static int rt711_sdca_set_gain_put(struct snd_kcontrol *kcontrol, gain_r_val &= 0xffff; } + if (lvalue != gain_l_val || rvalue != gain_r_val) + changed = 1; + else + return 0; + for (i = 0; i < 3; i++) { /* retry 3 times at most */ /* Lch*/ regmap_write(rt711->mbq_regmap, mc->reg, gain_l_val); @@ -573,7 +582,7 @@ static int rt711_sdca_set_gain_put(struct snd_kcontrol *kcontrol, break; } - return i == 3 ? -EIO : 0; + return i == 3 ? -EIO : changed; } static int rt711_sdca_set_gain_get(struct snd_kcontrol *kcontrol, -- cgit v1.2.3