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ASoC: arizona: Ensure we clock two channels for I2S mode

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I2S requires stereo clocking even for mono data.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-03-05 14:17:47 +08:00
parent 3f341f741d
commit 76bf969e6f
1 changed files with 8 additions and 1 deletions
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9
sound/soc/codecs/arizona.c
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@ -818,7 +818,7 @@ static int arizona_hw_params(struct snd_pcm_substream *substream,
struct arizona *arizona = priv->arizona;
int base = dai->driver->base;
const int *rates;
int i, ret;
int i, ret, val;
int chan_limit = arizona->pdata.max_channels_clocked[dai->id - 1];
int bclk, lrclk, wl, frame, bclk_target;
@ -834,6 +834,13 @@ static int arizona_hw_params(struct snd_pcm_substream *substream,
bclk_target *= chan_limit;
}
/* Force stereo for I2S mode */
val = snd_soc_read(codec, base + ARIZONA_AIF_FORMAT);
if (params_channels(params) == 1 && (val & ARIZONA_AIF1_FMT_MASK)) {
arizona_aif_dbg(dai, "Forcing stereo mode\n");
bclk_target *= 2;
}
for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {
if (rates[i] >= bclk_target &&
rates[i] % params_rate(params) == 0) {