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ASoC: Automatically manage ALC coefficients for WM8960

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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-07-05 23:54:51 +09:00
parent afd6d36a0d
commit db059c0f6e
1 changed files with 22 additions and 0 deletions
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22
sound/soc/codecs/wm8960.c
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@ -487,6 +487,21 @@ static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai,
return 0;
}
static struct {
int rate;
unsigned int val;
} alc_rates[] = {
{ 48000, 0 },
{ 44100, 0 },
{ 32000, 1 },
{ 22050, 2 },
{ 24000, 2 },
{ 16000, 3 },
{ 11250, 4 },
{ 12000, 4 },
{ 8000, 5 },
};
static int wm8960_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
@ -496,6 +511,7 @@ static int wm8960_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_codec *codec = socdev->card->codec;
struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec);
u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
int i;
/* bit size */
switch (params_format(params)) {
@ -513,6 +529,12 @@ static int wm8960_hw_params(struct snd_pcm_substream *substream,
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
wm8960->playback_fs = params_rate(params);
wm8960_set_deemph(codec);
} else {
for (i = 0; i < ARRAY_SIZE(alc_rates); i++)
if (alc_rates[i].rate == params_rate(params))
snd_soc_update_bits(codec,
WM8960_ADDCTL3, 0x7,
alc_rates[i].val);
}
/* set iface */