Commit db059c0f authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Automatically manage ALC coefficients for WM8960 



Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent afd6d36a

sound/soc/codecs/wm8960.c

+22 −0
Original line number Diff line number Diff line
@@ -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 */