sound/soc/qcom/common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2018, Linaro Limited.
   3 // Copyright (c) 2018, The Linux Foundation. All rights reserved.
   4
   5 #include <linux/module.h>
   6 #include "common.h"
   7
   8 int qcom_snd_parse_of(struct snd_soc_card *card)
   9 {
  10         struct device_node *np;
  11         struct device_node *codec = NULL;
  12         struct device_node *platform = NULL;
  13         struct device_node *cpu = NULL;
  14         struct device *dev = card->dev;
  15         struct snd_soc_dai_link *link;
  16         struct of_phandle_args args;
  17         struct snd_soc_dai_link_component *dlc;
  18         int ret, num_links;
  19
  20         ret = snd_soc_of_parse_card_name(card, "model");
  21         if (ret == 0 && !card->name)
  22                 /* Deprecated, only for compatibility with old device trees */
  23                 ret = snd_soc_of_parse_card_name(card, "qcom,model");
  24         if (ret) {
  25                 dev_err(dev, "Error parsing card name: %d\n", ret);
  26                 return ret;
  27         }
  28
  29         /* DAPM routes */
  30         if (of_property_read_bool(dev->of_node, "audio-routing")) {
  31                 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
  32                 if (ret)
  33                         return ret;
  34         }
  35         /* Deprecated, only for compatibility with old device trees */
  36         if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
  37                 ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing");
  38                 if (ret)
  39                         return ret;
  40         }
  41
  42         ret = snd_soc_of_parse_aux_devs(card, "aux-devs");
  43         if (ret)
  44                 return ret;
  45
  46         /* Populate links */
  47         num_links = of_get_child_count(dev->of_node);
  48
  49         /* Allocate the DAI link array */
  50         card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
  51         if (!card->dai_link)
  52                 return -ENOMEM;
  53
  54         card->num_links = num_links;
  55         link = card->dai_link;
  56
  57         for_each_child_of_node(dev->of_node, np) {
  58                 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
  59                 if (!dlc) {
  60                         ret = -ENOMEM;
  61                         goto err_put_np;
  62                 }
  63
  64                 link->cpus      = &dlc[0];
  65                 link->platforms = &dlc[1];
  66
  67                 link->num_cpus          = 1;
  68                 link->num_platforms     = 1;
  69
  70                 ret = of_property_read_string(np, "link-name", &link->name);
  71                 if (ret) {
  72                         dev_err(card->dev, "error getting codec dai_link name\n");
  73                         goto err_put_np;
  74                 }
  75
  76                 cpu = of_get_child_by_name(np, "cpu");
  77                 platform = of_get_child_by_name(np, "platform");
  78                 codec = of_get_child_by_name(np, "codec");
  79
  80                 if (!cpu) {
  81                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  82                         ret = -EINVAL;
  83                         goto err;
  84                 }
  85
  86                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  87                                         "#sound-dai-cells", 0, &args);
  88                 if (ret) {
  89                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  90                         goto err;
  91                 }
  92                 link->cpus->of_node = args.np;
  93                 link->id = args.args[0];
  94
  95                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  96                 if (ret) {
  97                         if (ret != -EPROBE_DEFER)
  98                                 dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
  99                                         link->name, ret);
 100                         goto err;
 101                 }
 102
 103                 if (platform) {
 104                         link->platforms->of_node = of_parse_phandle(platform,
 105                                         "sound-dai",
 106                                         0);
 107                         if (!link->platforms->of_node) {
 108                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
 109                                 ret = -EINVAL;
 110                                 goto err;
 111                         }
 112                 } else {
 113                         link->platforms->of_node = link->cpus->of_node;
 114                 }
 115
 116                 if (codec) {
 117                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
 118                         if (ret < 0) {
 119                                 if (ret != -EPROBE_DEFER)
 120                                         dev_err(card->dev, "%s: codec dai not found: %d\n",
 121                                                 link->name, ret);
 122                                 goto err;
 123                         }
 124
 125                         if (platform) {
 126                                 /* DPCM backend */
 127                                 link->no_pcm = 1;
 128                                 link->ignore_pmdown_time = 1;
 129                         }
 130                 } else {
 131                         /* DPCM frontend */
 132                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 133                         if (!dlc) {
 134                                 ret = -ENOMEM;
 135                                 goto err;
 136                         }
 137
 138                         link->codecs     = dlc;
 139                         link->num_codecs = 1;
 140
 141                         link->codecs->dai_name = "snd-soc-dummy-dai";
 142                         link->codecs->name = "snd-soc-dummy";
 143                         link->dynamic = 1;
 144                 }
 145
 146                 if (platform || !codec) {
 147                         /* DPCM */
 148                         snd_soc_dai_link_set_capabilities(link);
 149                         link->ignore_suspend = 1;
 150                         link->nonatomic = 1;
 151                 }
 152
 153                 link->stream_name = link->name;
 154                 link++;
 155
 156                 of_node_put(cpu);
 157                 of_node_put(codec);
 158                 of_node_put(platform);
 159         }
 160
 161         return 0;
 162 err:
 163         of_node_put(cpu);
 164         of_node_put(codec);
 165         of_node_put(platform);
 166 err_put_np:
 167         of_node_put(np);
 168         return ret;
 169 }
 170 EXPORT_SYMBOL(qcom_snd_parse_of);
 171
 172 MODULE_LICENSE("GPL v2");