openwrtv3/target/linux/brcm2708/patches-3.10/0115-ASoC-core-Add-API-for-configuration-of-DAI-BCLK-rati.patch

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