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

   1 From 5c080b18934d9dcea2bf902c09d640daf6fe49d4 Mon Sep 17 00:00:00 2001
   2 From: Liam Girdwood <liam.r.girdwood@linux.intel.com>
   3 Date: Mon, 16 Sep 2013 13:01:46 +0100
   4 Subject: [PATCH 115/174] ASoC: core: Add API for configuration of DAI BCLK
   5  ratio
   6
   7 Some codec drivers when running in slave mode require that BCLK to sample rate ratio
   8 is explicitly set by the machine driver as it may not be exactly rate * frame size.
   9
  10 Extend the DAI API by adding :-
  11
  12 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
  13
  14 Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
  15 Signed-off-by: Mark Brown <broonie@linaro.org>
  16 ---
  17  include/sound/soc-dai.h |  3 +++
  18  sound/soc/soc-core.c    | 16 ++++++++++++++++
  19  2 files changed, 19 insertions(+)
  20
  21 --- a/include/sound/soc-dai.h
  22 +++ b/include/sound/soc-dai.h
  23 @@ -105,6 +105,8 @@ int snd_soc_dai_set_clkdiv(struct snd_so
  24  int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
  25         int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
  26
  27 +int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
  28 +
  29  /* Digital Audio interface formatting */
  30  int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
  31
  32 @@ -131,6 +133,7 @@ struct snd_soc_dai_ops {
  33         int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
  34                 unsigned int freq_in, unsigned int freq_out);
  35         int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
  36 +       int (*set_bclk_ratio)(struct snd_soc_dai *dai, unsigned int ratio);
  37
  38         /*
  39          * DAI format configuration
  40 --- a/sound/soc/soc-core.c
  41 +++ b/sound/soc/soc-core.c
  42 @@ -3463,6 +3463,22 @@ int snd_soc_codec_set_pll(struct snd_soc
  43  EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
  44
  45  /**
  46 + * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
  47 + * @dai: DAI
  48 + * @ratio Ratio of BCLK to Sample rate.
  49 + *
  50 + * Configures the DAI for a preset BCLK to sample rate ratio.
  51 + */
  52 +int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
  53 +{
  54 +       if (dai->driver && dai->driver->ops->set_bclk_ratio)
  55 +               return dai->driver->ops->set_bclk_ratio(dai, ratio);
  56 +       else
  57 +               return -EINVAL;
  58 +}
  59 +EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
  60 +
  61 +/**
  62   * snd_soc_dai_set_fmt - configure DAI hardware audio format.
  63   * @dai: DAI
  64   * @fmt: SND_SOC_DAIFMT_ format value.