sound/soc/intel/boards/sof_sdw_rt1316.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2020 Intel Corporation
   3
   4 /*
   5  *  sof_sdw_rt1316 - Helpers to handle RT1316 from generic machine driver
   6  */
   7
   8 #include <linux/device.h>
   9 #include <linux/errno.h>
  10 #include <sound/control.h>
  11 #include <sound/soc.h>
  12 #include <sound/soc-acpi.h>
  13 #include <sound/soc-dapm.h>
  14 #include "sof_sdw_common.h"
  15
  16 static const struct snd_soc_dapm_widget rt1316_widgets[] = {
  17         SND_SOC_DAPM_SPK("Speaker", NULL),
  18 };
  19
  20 /*
  21  * dapm routes for rt1316 will be registered dynamically according
  22  * to the number of rt1316 used. The first two entries will be registered
  23  * for one codec case, and the last two entries are also registered
  24  * if two 1316s are used.
  25  */
  26 static const struct snd_soc_dapm_route rt1316_map[] = {
  27         { "Speaker", NULL, "rt1316-1 SPOL" },
  28         { "Speaker", NULL, "rt1316-1 SPOR" },
  29         { "Speaker", NULL, "rt1316-2 SPOL" },
  30         { "Speaker", NULL, "rt1316-2 SPOR" },
  31 };
  32
  33 static const struct snd_kcontrol_new rt1316_controls[] = {
  34         SOC_DAPM_PIN_SWITCH("Speaker"),
  35 };
  36
  37 static int first_spk_init(struct snd_soc_pcm_runtime *rtd)
  38 {
  39         struct snd_soc_card *card = rtd->card;
  40         int ret;
  41
  42         card->components = devm_kasprintf(card->dev, GFP_KERNEL,
  43                                           "%s spk:rt1316",
  44                                           card->components);
  45         if (!card->components)
  46                 return -ENOMEM;
  47
  48         ret = snd_soc_add_card_controls(card, rt1316_controls,
  49                                         ARRAY_SIZE(rt1316_controls));
  50         if (ret) {
  51                 dev_err(card->dev, "rt1316 controls addition failed: %d\n", ret);
  52                 return ret;
  53         }
  54
  55         ret = snd_soc_dapm_new_controls(&card->dapm, rt1316_widgets,
  56                                         ARRAY_SIZE(rt1316_widgets));
  57         if (ret) {
  58                 dev_err(card->dev, "rt1316 widgets addition failed: %d\n", ret);
  59                 return ret;
  60         }
  61
  62         ret = snd_soc_dapm_add_routes(&card->dapm, rt1316_map, 2);
  63         if (ret)
  64                 dev_err(rtd->dev, "failed to add first SPK map: %d\n", ret);
  65
  66         return ret;
  67 }
  68
  69 static int second_spk_init(struct snd_soc_pcm_runtime *rtd)
  70 {
  71         struct snd_soc_card *card = rtd->card;
  72         int ret;
  73
  74         ret = snd_soc_dapm_add_routes(&card->dapm, rt1316_map + 2, 2);
  75         if (ret)
  76                 dev_err(rtd->dev, "failed to add second SPK map: %d\n", ret);
  77
  78         return ret;
  79 }
  80
  81 static int all_spk_init(struct snd_soc_pcm_runtime *rtd)
  82 {
  83         int ret;
  84
  85         ret = first_spk_init(rtd);
  86         if (ret)
  87                 return ret;
  88
  89         return second_spk_init(rtd);
  90 }
  91
  92 int sof_sdw_rt1316_init(const struct snd_soc_acpi_link_adr *link,
  93                         struct snd_soc_dai_link *dai_links,
  94                         struct sof_sdw_codec_info *info,
  95                         bool playback)
  96 {
  97         /* Count amp number and do init on playback link only. */
  98         if (!playback)
  99                 return 0;
 100
 101         info->amp_num++;
 102         if (info->amp_num == 1)
 103                 dai_links->init = first_spk_init;
 104
 105         if (info->amp_num == 2) {
 106                 /*
 107                  * if two 1316s are in one dai link, the init function
 108                  * in this dai link will be first set for the first speaker,
 109                  * and it should be reset to initialize all speakers when
 110                  * the second speaker is found.
 111                  */
 112                 if (dai_links->init)
 113                         dai_links->init = all_spk_init;
 114                 else
 115                         dai_links->init = second_spk_init;
 116         }
 117
 118         return 0;
 119 }