diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-17 07:35:14 (GMT) |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-21 08:47:39 (GMT) |
commit | c94aa30edac4d328674e9c127918317009d30c1a (patch) | |
tree | 42870cb5423f9cabcc901eb6591ca2c212628062 /sound/soc/codecs/arizona.c | |
parent | f2c26d48d9c6e91c6b9c914f215952400e6f889b (diff) | |
download | linux-fsl-qoriq-c94aa30edac4d328674e9c127918317009d30c1a.tar.xz |
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.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c index 845d256..d855a6c 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; |