git.openwrt.org Git - openwrt/staging/mkresin.git/blob

   1 From fc4146698489c4725c9ac86ea3e0484914d5285b Mon Sep 17 00:00:00 2001
   2 From: Viorel Suman <viorel.suman@nxp.com>
   3 Date: Wed, 27 Jun 2018 10:31:02 +0300
   4 Subject: [PATCH] MLK-18682-1: ASoC: fsl: sai: use set_bclk_ratio to calculate
   5  BCLK freq (part 1)
   6
   7 ALSA API has a standard way to configure DAI BCLK by calling
   8 "snd_soc_dai_set_bclk_ratio" function. So use it to set BCLK ratio
   9 and calculate SAI BCLK frequency.
  10
  11 Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
  12 [ Aisheng: split machine imx-pdm changes ]
  13 Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
  14 ---
  15  sound/soc/fsl/fsl_sai.c | 21 +++++++++++++--------
  16  sound/soc/fsl/fsl_sai.h |  3 +--
  17  2 files changed, 14 insertions(+), 10 deletions(-)
  18
  19 --- a/sound/soc/fsl/fsl_sai.c
  20 +++ b/sound/soc/fsl/fsl_sai.c
  21 @@ -234,6 +234,14 @@ static int fsl_sai_set_dai_sysclk_tr(str
  22         return 0;
  23  }
  24
  25 +static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
  26 +{
  27 +       struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
  28 +
  29 +       sai->bitclk_ratio = ratio;
  30 +       return 0;
  31 +}
  32 +
  33  static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
  34                 int clk_id, unsigned int freq, int dir)
  35  {
  36 @@ -243,11 +251,6 @@ static int fsl_sai_set_dai_sysclk(struct
  37         if (dir == SND_SOC_CLOCK_IN)
  38                 return 0;
  39
  40 -       if (clk_id == FSL_SAI_CLK_BIT) {
  41 -               sai->bitclk_freq = freq;
  42 -               return 0;
  43 -       }
  44 -
  45         if (freq > 0) {
  46                 if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
  47                         dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id);
  48 @@ -571,6 +574,7 @@ static int fsl_sai_hw_params(struct snd_
  49         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
  50         unsigned int channels = params_channels(params);
  51         u32 word_width = params_width(params);
  52 +       u32 rate = params_rate(params);
  53         u32 val_cr4 = 0, val_cr5 = 0;
  54         u32 slots = (channels == 1) ? 2 : channels;
  55         u32 slot_width = word_width;
  56 @@ -605,12 +609,12 @@ static int fsl_sai_hw_params(struct snd_
  57                 slot_width = sai->slot_width;
  58
  59         if (!sai->slave_mode[tx]) {
  60 -               if (sai->bitclk_freq)
  61 +               if (sai->bitclk_ratio)
  62                         ret = fsl_sai_set_bclk(cpu_dai, tx,
  63 -                                       sai->bitclk_freq);
  64 +                                       rate * sai->bitclk_ratio);
  65                 else
  66                         ret = fsl_sai_set_bclk(cpu_dai, tx,
  67 -                               slots * slot_width * params_rate(params));
  68 +                                       rate * slots * slot_width);
  69                 if (ret)
  70                         return ret;
  71
  72 @@ -935,6 +939,7 @@ static void fsl_sai_shutdown(struct snd_
  73  }
  74
  75  static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
  76 +       .set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
  77         .set_sysclk     = fsl_sai_set_dai_sysclk,
  78         .set_fmt        = fsl_sai_set_dai_fmt,
  79         .set_tdm_slot   = fsl_sai_set_dai_tdm_slot,
  80 --- a/sound/soc/fsl/fsl_sai.h
  81 +++ b/sound/soc/fsl/fsl_sai.h
  82 @@ -203,7 +203,6 @@
  83  #define FSL_SAI_CLK_MAST3      3
  84
  85  #define FSL_SAI_MCLK_MAX       4
  86 -#define FSL_SAI_CLK_BIT                5
  87
  88  /* SAI data transfer numbers per DMA request */
  89  #define FSL_SAI_MAXBURST_TX 6
  90 @@ -258,7 +257,7 @@ struct fsl_sai {
  91         unsigned int mclk_streams;
  92         unsigned int slots;
  93         unsigned int slot_width;
  94 -       unsigned int bitclk_freq;
  95 +       unsigned int bitclk_ratio;
  96
  97         struct snd_soc_dai_driver cpu_dai_drv;
  98         struct snd_dmaengine_dai_dma_data dma_params_rx;