target/linux/bcm27xx/patches-5.4/950-0073-sound-Support-for-Dion-Audio-LOCO-V2-DAC-AMP-HAT.patch

   1 From a1a8a4fb0f50f92f1c42164827dbdfb57007f183 Mon Sep 17 00:00:00 2001
   2 From: Miquel <miquelblauw@hotmail.com>
   3 Date: Fri, 24 Feb 2017 20:51:06 +0100
   4 Subject: [PATCH] sound: Support for Dion Audio LOCO-V2 DAC-AMP HAT
   5
   6 Signed-off-by: Miquel Blauw <info@dionaudio.nl>
   7
   8 ASoC: dionaudio_loco-v2: fix S24_LE format
   9
  10 Remove set_bclk_ratio call so 24-bit data is transmitted in
  11 24 bclk cycles.
  12
  13 Also remove hw_params and ops as they are no longer needed.
  14
  15 Signed-off-by: Matthias Reichl <hias@horus.com>
  16
  17 ASoC: dionaudio_loco-v2: use modern dai_link style
  18
  19 Signed-off-by: Hui Wang <hui.wang@canonical.com>
  20 ---
  21  sound/soc/bcm/dionaudio_loco-v2.c | 117 ++++++++++++++++++++++++++++++
  22  1 file changed, 117 insertions(+)
  23  create mode 100644 sound/soc/bcm/dionaudio_loco-v2.c
  24
  25 --- /dev/null
  26 +++ b/sound/soc/bcm/dionaudio_loco-v2.c
  27 @@ -0,0 +1,117 @@
  28 +/*
  29 + * ASoC Driver for Dion Audio LOCO-V2 DAC-AMP
  30 + *
  31 + * Author:      Miquel Blauw <info@dionaudio.nl>
  32 + *              Copyright 2017
  33 + *
  34 + * Based on the software of the RPi-DAC writen by Florian Meier
  35 + *
  36 + * This program is free software; you can redistribute it and/or
  37 + * modify it under the terms of the GNU General Public License
  38 + * version 2 as published by the Free Software Foundation.
  39 + *
  40 + * This program is distributed in the hope that it will be useful, but
  41 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  42 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  43 + * General Public License for more details.
  44 + */
  45 +
  46 +#include <linux/module.h>
  47 +#include <linux/platform_device.h>
  48 +
  49 +#include <sound/core.h>
  50 +#include <sound/pcm.h>
  51 +#include <sound/pcm_params.h>
  52 +#include <sound/soc.h>
  53 +#include <sound/jack.h>
  54 +
  55 +static bool digital_gain_0db_limit = true;
  56 +
  57 +static int snd_rpi_dionaudio_loco_v2_init(struct snd_soc_pcm_runtime *rtd)
  58 +{
  59 +       if (digital_gain_0db_limit) {
  60 +               int ret;
  61 +               struct snd_soc_card *card = rtd->card;
  62 +
  63 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
  64 +               if (ret < 0)
  65 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
  66 +       }
  67 +
  68 +       return 0;
  69 +}
  70 +
  71 +SND_SOC_DAILINK_DEFS(dionaudio_loco_v2,
  72 +       DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")),
  73 +       DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi")),
  74 +       DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0")));
  75 +
  76 +static struct snd_soc_dai_link snd_rpi_dionaudio_loco_v2_dai[] = {
  77 +{
  78 +       .name           = "DionAudio LOCO-V2",
  79 +       .stream_name    = "DionAudio LOCO-V2 DAC-AMP",
  80 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  81 +                         SND_SOC_DAIFMT_CBS_CFS,
  82 +       .init           = snd_rpi_dionaudio_loco_v2_init,
  83 +       SND_SOC_DAILINK_REG(dionaudio_loco_v2),
  84 +},};
  85 +
  86 +/* audio machine driver */
  87 +static struct snd_soc_card snd_rpi_dionaudio_loco_v2 = {
  88 +       .name         = "Dion Audio LOCO-V2",
  89 +       .dai_link     = snd_rpi_dionaudio_loco_v2_dai,
  90 +       .num_links    = ARRAY_SIZE(snd_rpi_dionaudio_loco_v2_dai),
  91 +};
  92 +
  93 +static int snd_rpi_dionaudio_loco_v2_probe(struct platform_device *pdev)
  94 +{
  95 +       int ret = 0;
  96 +
  97 +       snd_rpi_dionaudio_loco_v2.dev = &pdev->dev;
  98 +
  99 +       if (pdev->dev.of_node) {
 100 +               struct device_node *i2s_node;
 101 +               struct snd_soc_dai_link *dai =
 102 +                                       &snd_rpi_dionaudio_loco_v2_dai[0];
 103 +
 104 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 105 +                                           "i2s-controller", 0);
 106 +               if (i2s_node) {
 107 +                       dai->cpus->dai_name = NULL;
 108 +                       dai->cpus->of_node = i2s_node;
 109 +                       dai->platforms->name = NULL;
 110 +                       dai->platforms->of_node = i2s_node;
 111 +               }
 112 +
 113 +               digital_gain_0db_limit = !of_property_read_bool(
 114 +                       pdev->dev.of_node, "dionaudio,24db_digital_gain");
 115 +       }
 116 +
 117 +       ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_dionaudio_loco_v2);
 118 +       if (ret)
 119 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 120 +                       ret);
 121 +
 122 +       return ret;
 123 +}
 124 +
 125 +static const struct of_device_id dionaudio_of_match[] = {
 126 +       { .compatible = "dionaudio,dionaudio-loco-v2", },
 127 +       {},
 128 +};
 129 +MODULE_DEVICE_TABLE(of, dionaudio_of_match);
 130 +
 131 +static struct platform_driver snd_rpi_dionaudio_loco_v2_driver = {
 132 +       .driver = {
 133 +               .name   = "snd-rpi-dionaudio-loco-v2",
 134 +               .owner  = THIS_MODULE,
 135 +               .of_match_table = dionaudio_of_match,
 136 +       },
 137 +       .probe          = snd_rpi_dionaudio_loco_v2_probe,
 138 +};
 139 +
 140 +module_platform_driver(snd_rpi_dionaudio_loco_v2_driver);
 141 +
 142 +MODULE_AUTHOR("Miquel Blauw <info@dionaudio.nl>");
 143 +MODULE_DESCRIPTION("ASoC Driver for DionAudio LOCO-V2");
 144 +MODULE_LICENSE("GPL v2");