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Commit 6bfb6aa9 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Automatically manage WM8580 DAC OSR 



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

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent dacfe9f2

sound/soc/codecs/wm8580.c

+19 −1
Original line number Diff line number Diff line
@@ -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);