diff options
| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2015-06-25 10:35:12 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-07-07 14:15:12 +0200 |
| commit | 5f8e671a49e1d608fcf52c8944ea7818cd4c99a9 (patch) | |
| tree | 8802ff671911422dd7866a21d5ebe56b900eac5d /sound/soc/codecs/arizona.h | |
| parent | ASoC: arizona: Implement stability check for EQ coefficients (diff) | |
| download | linux-5f8e671a49e1d608fcf52c8944ea7818cd4c99a9.tar.xz linux-5f8e671a49e1d608fcf52c8944ea7818cd4c99a9.zip | |
ASoC: arizona: Implement stability check for LHPF coefficients
Specifying unstable coefficients for the low/high pass filters can have
a severe impact on the audio. This patchs adds a stability check on the
coefficients written to the low/high pass filter block to prevent this.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/arizona.h')
| -rw-r--r-- | sound/soc/codecs/arizona.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/soc/codecs/arizona.h b/sound/soc/codecs/arizona.h index ebe50cf2f878..13598b0572ee 100644 --- a/sound/soc/codecs/arizona.h +++ b/sound/soc/codecs/arizona.h @@ -201,6 +201,13 @@ extern int arizona_mixer_values[ARIZONA_NUM_MIXER_INPUTS]; ((unsigned long)&(struct soc_bytes) { .base = xbase, \ .num_regs = 20, .mask = ~ARIZONA_EQ1_B1_MODE }) } +#define ARIZONA_LHPF_CONTROL(xname, xbase) \ +{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \ + .info = snd_soc_bytes_info, .get = snd_soc_bytes_get, \ + .put = arizona_lhpf_coeff_put, .private_value = \ + ((unsigned long)&(struct soc_bytes) { .base = xbase, \ + .num_regs = 1 }) } + #define ARIZONA_RATE_ENUM_SIZE 4 extern const char *arizona_rate_text[ARIZONA_RATE_ENUM_SIZE]; extern const int arizona_rate_val[ARIZONA_RATE_ENUM_SIZE]; @@ -238,6 +245,8 @@ extern int arizona_hp_ev(struct snd_soc_dapm_widget *w, extern int arizona_eq_coeff_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol); +extern int arizona_lhpf_coeff_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol); extern int arizona_set_sysclk(struct snd_soc_codec *codec, int clk_id, int source, unsigned int freq, int dir); |