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| author | Julian Scheel <julian@jusst.de> | 2015-06-12 15:57:32 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-06-12 17:16:57 +0100 |
| commit | ef5294fd250adc8c340ffeb410b62e1b777ddf6f (patch) | |
| tree | e03b77e9163d9c9995d62babf4edea8d90a54e1a /sound/soc/codecs/wm8523.c | |
| parent | b787f68c36d49bb1d9236f403813641efa74a031 (diff) | |
| download | op-kernel-dev-ef5294fd250adc8c340ffeb410b62e1b777ddf6f.zip op-kernel-dev-ef5294fd250adc8c340ffeb410b62e1b777ddf6f.tar.gz | |
ASoC: wm8523: Set bclk ratio for master mode
When running in master mode the bclk divider must be configured to generate a
sane bitclock. Pick the smallest fs multiplicator, which can hold all
transmitted bits.
Signed-off-by: Julian Scheel <julian@jusst.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/wm8523.c')
| -rw-r--r-- | sound/soc/codecs/wm8523.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8523.c b/sound/soc/codecs/wm8523.c index b1cc94f..f9dffd2 100644 --- a/sound/soc/codecs/wm8523.c +++ b/sound/soc/codecs/wm8523.c @@ -113,6 +113,15 @@ static struct { { 7, 1152 }, }; +static struct { + int value; + int ratio; +} bclk_ratios[WM8523_NUM_RATES] = { + { 2, 32 }, + { 3, 64 }, + { 4, 128 }, +}; + static int wm8523_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { @@ -162,6 +171,23 @@ static int wm8523_hw_params(struct snd_pcm_substream *substream, aifctrl2 &= ~WM8523_SR_MASK; aifctrl2 |= lrclk_ratios[i].value; + if (aifctrl1 & WM8523_AIF_MSTR) { + /* Find a fs->bclk ratio */ + for (i = 0; i < ARRAY_SIZE(bclk_ratios); i++) + if (params_width(params) * 2 <= bclk_ratios[i].ratio) + break; + + if (i == ARRAY_SIZE(bclk_ratios)) { + dev_err(codec->dev, + "No matching BCLK/fs ratio for word length %d\n", + params_width(params)); + return -EINVAL; + } + + aifctrl2 &= ~WM8523_BCLKDIV_MASK; + aifctrl2 |= bclk_ratios[i].value << WM8523_BCLKDIV_SHIFT; + } + aifctrl1 &= ~WM8523_WL_MASK; switch (params_width(params)) { case 16: |
