If we're setting the currently applied value for one of the DSP algorithm configurations we can just skip all the handling as the control set is a noop. This ensures we do not disrupt a running DSP.

Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8958-dsp2.c | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/wm8958-dsp2.c b/sound/soc/codecs/wm8958-dsp2.c index 5d4bc7a..ca26779 100644 --- a/sound/soc/codecs/wm8958-dsp2.c +++ b/sound/soc/codecs/wm8958-dsp2.c @@ -508,6 +508,9 @@ static int wm8958_mbc_put(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

+ if (wm8994->mbc_ena[mbc] == ucontrol->value.integer.value[0]) + return 0; + if (ucontrol->value.integer.value[0] > 1) return -EINVAL;

@@ -628,6 +631,9 @@ static int wm8958_vss_put(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

+ if (wm8994->vss_ena[vss] == ucontrol->value.integer.value[0]) + return 0; + if (ucontrol->value.integer.value[0] > 1) return -EINVAL;

@@ -689,6 +695,16 @@ static int wm8958_hpf_put(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

+ if (hpf < 3) { + if (wm8994->hpf1_ena[hpf % 3] == + ucontrol->value.integer.value[0]) + return 0; + } else { + if (wm8994->hpf2_ena[hpf % 3] == + ucontrol->value.integer.value[0]) + return 0; + } + if (ucontrol->value.integer.value[0] > 1) return -EINVAL;

@@ -782,6 +798,9 @@ static int wm8958_enh_eq_put(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);

+ if (wm8994->enh_eq_ena[eq] == ucontrol->value.integer.value[0]) + return 0; + if (ucontrol->value.integer.value[0] > 1) return -EINVAL;