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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-17 16:35:14 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-21 17:47:39 +0900
commitc94aa30edac4d328674e9c127918317009d30c1a (patch)
tree42870cb5423f9cabcc901eb6591ca2c212628062 /sound/soc/codecs/arizona.c
parentf2c26d48d9c6e91c6b9c914f215952400e6f889b (diff)
ASoC: arizona: Allow number of channels clocked to be restricted
Place a cap on the number of channels clocks are generated for. This is intended for use with systems which have the WM5102 master an I2S bus with multiple data lines. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/arizona.c')
-rw-r--r--sound/soc/codecs/arizona.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 845d25630ba..d855a6c098d 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -762,18 +762,28 @@ static int arizona_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
+ struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+ struct arizona *arizona = priv->arizona;
int base = dai->driver->base;
const int *rates;
int i, ret;
- int bclk, lrclk, wl, frame;
+ int chan_limit = arizona->pdata.max_channels_clocked[dai->id - 1];
+ int bclk, lrclk, wl, frame, bclk_target;
if (params_rate(params) % 8000)
rates = &arizona_44k1_bclk_rates[0];
else
rates = &arizona_48k_bclk_rates[0];
+ bclk_target = snd_soc_params_to_bclk(params);
+ if (chan_limit && chan_limit < params_channels(params)) {
+ arizona_aif_dbg(dai, "Limiting to %d channels\n", chan_limit);
+ bclk_target /= params_channels(params);
+ bclk_target *= chan_limit;
+ }
+
for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {
- if (rates[i] >= snd_soc_params_to_bclk(params) &&
+ if (rates[i] >= bclk_target &&
rates[i] % params_rate(params) == 0) {
bclk = i;
break;