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ASoC: Automatically manage WM8580 DAC OSR 

The DAC OSR should be selected based on the sample clock ratio.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-08-13 20:08:55 +01:00
parent dacfe9f277
commit 6bfb6aa91f
1 changed files with 19 additions and 1 deletions
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20
sound/soc/codecs/wm8580.c
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@ -94,6 +94,8 @@
#define WM8580_MAX_REGISTER 0x35
#define WM8580_DACOSR 0x40
/* PLLB4 (register 7h) */
#define WM8580_PLLB4_MCLKOUTSRC_MASK 0x60
#define WM8580_PLLB4_MCLKOUTSRC_PLLA 0x20
@ -481,7 +483,7 @@ static int wm8580_paif_hw_params(struct snd_pcm_substream *substream,
struct wm8580_priv *wm8580 = snd_soc_codec_get_drvdata(codec);
u16 paifa = 0;
u16 paifb = 0;
int i, ratio;
int i, ratio, osr;
/* bit size */
switch (params_format(params)) {
@ -518,6 +520,22 @@ static int wm8580_paif_hw_params(struct snd_pcm_substream *substream,
dev_dbg(codec->dev, "Running at %dfs with %dHz clock\n",
wm8580_sysclk_ratios[i], wm8580->sysclk[dai->driver->id]);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (ratio) {
case 128:
case 192:
osr = WM8580_DACOSR;
dev_dbg(codec->dev, "Selecting 64x OSR\n");
break;
default:
osr = 0;
dev_dbg(codec->dev, "Selecting 128x OSR\n");
break;
}
snd_soc_update_bits(codec, WM8580_PAIF3, WM8580_DACOSR, osr);
}
snd_soc_update_bits(codec, WM8580_PAIF1 + dai->driver->id,
WM8580_AIF_RATE_MASK | WM8580_AIF_BCLKSEL_MASK,
paifa);