target/linux/layerscape/patches-5.4/801-audio-0047-MLK-17580-ASoC-fsl-dsd-Add-DSD-utilities-helper.patch

   1 From e28e3e0d01c0fcb628e841977b51c45189b43f47 Mon Sep 17 00:00:00 2001
   2 From: Viorel Suman <viorel.suman@nxp.com>
   3 Date: Thu, 8 Mar 2018 14:37:30 +0200
   4 Subject: [PATCH] MLK-17580: ASoC: fsl: dsd: Add DSD utilities helper
   5
   6 Add DSD utilities helper.
   7
   8 Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
   9 Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com
  10 ---
  11  sound/soc/fsl/fsl_dsd.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++++
  12  1 file changed, 59 insertions(+)
  13  create mode 100644 sound/soc/fsl/fsl_dsd.h
  14
  15 --- /dev/null
  16 +++ b/sound/soc/fsl/fsl_dsd.h
  17 @@ -0,0 +1,59 @@
  18 +/*
  19 + * Copyright 2018 NXP
  20 + *
  21 + * This program is free software; you can redistribute it and/or modify
  22 + * it under the terms of the GNU General Public License version 2 as
  23 + * published by the Free Software Foundation.
  24 + */
  25 +
  26 +#ifndef __FSL_DSD_H
  27 +#define __FSL_DSD_H
  28 +
  29 +#include <linux/pinctrl/consumer.h>
  30 +#include <sound/pcm_params.h>
  31 +#include <sound/soc.h>
  32 +
  33 +static bool fsl_is_dsd(struct snd_pcm_hw_params *params)
  34 +{
  35 +       snd_pcm_format_t format = params_format(params);
  36 +
  37 +       switch (format) {
  38 +       case SNDRV_PCM_FORMAT_DSD_U8:
  39 +       case SNDRV_PCM_FORMAT_DSD_U16_LE:
  40 +       case SNDRV_PCM_FORMAT_DSD_U16_BE:
  41 +       case SNDRV_PCM_FORMAT_DSD_U32_LE:
  42 +       case SNDRV_PCM_FORMAT_DSD_U32_BE:
  43 +               return true;
  44 +       default:
  45 +               return false;
  46 +       }
  47 +}
  48 +
  49 +static struct pinctrl_state *fsl_get_pins_state(struct pinctrl *pinctrl,
  50 +       struct snd_pcm_hw_params *params)
  51 +{
  52 +       int dsd_bclk;
  53 +       struct pinctrl_state *state = 0;
  54 +
  55 +       if (fsl_is_dsd(params)) {
  56 +               dsd_bclk = params_rate(params) * params_physical_width(params);
  57 +
  58 +               switch (dsd_bclk) {
  59 +               case 22579200: /* DSD512 */
  60 +                       state = pinctrl_lookup_state(pinctrl, "dsd512");
  61 +                       break;
  62 +               }
  63 +
  64 +               /* Get default DSD state */
  65 +               if (IS_ERR_OR_NULL(state))
  66 +                       state = pinctrl_lookup_state(pinctrl, "dsd");
  67 +       }
  68 +
  69 +       /* Get default state */
  70 +       if (IS_ERR_OR_NULL(state))
  71 +               state = pinctrl_lookup_state(pinctrl, "default");
  72 +
  73 +       return state;
  74 +}
  75 +
  76 +#endif /* __FSL_DSD_H */