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65 lines
2.2 KiB
65 lines
2.2 KiB
11 years ago
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From 5c080b18934d9dcea2bf902c09d640daf6fe49d4 Mon Sep 17 00:00:00 2001
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From: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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Date: Mon, 16 Sep 2013 13:01:46 +0100
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Subject: [PATCH 115/174] ASoC: core: Add API for configuration of DAI BCLK
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ratio
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Some codec drivers when running in slave mode require that BCLK to sample rate ratio
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is explicitly set by the machine driver as it may not be exactly rate * frame size.
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Extend the DAI API by adding :-
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int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
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Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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Signed-off-by: Mark Brown <broonie@linaro.org>
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---
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include/sound/soc-dai.h | 3 +++
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sound/soc/soc-core.c | 16 ++++++++++++++++
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2 files changed, 19 insertions(+)
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--- a/include/sound/soc-dai.h
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+++ b/include/sound/soc-dai.h
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@@ -105,6 +105,8 @@ int snd_soc_dai_set_clkdiv(struct snd_so
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int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
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int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
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+int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
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+
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/* Digital Audio interface formatting */
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int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
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@@ -131,6 +133,7 @@ struct snd_soc_dai_ops {
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int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
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unsigned int freq_in, unsigned int freq_out);
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int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
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+ int (*set_bclk_ratio)(struct snd_soc_dai *dai, unsigned int ratio);
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/*
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* DAI format configuration
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--- a/sound/soc/soc-core.c
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+++ b/sound/soc/soc-core.c
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@@ -3463,6 +3463,22 @@ int snd_soc_codec_set_pll(struct snd_soc
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EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
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/**
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+ * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
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+ * @dai: DAI
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+ * @ratio Ratio of BCLK to Sample rate.
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+ *
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+ * Configures the DAI for a preset BCLK to sample rate ratio.
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+ */
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+int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
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+{
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+ if (dai->driver && dai->driver->ops->set_bclk_ratio)
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+ return dai->driver->ops->set_bclk_ratio(dai, ratio);
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+ else
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+ return -EINVAL;
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+}
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+EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
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+
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+/**
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* snd_soc_dai_set_fmt - configure DAI hardware audio format.
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* @dai: DAI
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* @fmt: SND_SOC_DAIFMT_ format value.
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