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         /* Populate links */
  43         num_links = of_get_child_count(dev->of_node);
  44
  45         /* Allocate the DAI link array */
  46         card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
  47         if (!card->dai_link)
  48                 return -ENOMEM;
  49
  50         card->num_links = num_links;
  51         link = card->dai_link;
  52
  53         for_each_child_of_node(dev->of_node, np) {
  54                 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
  55                 if (!dlc)
  56                         return -ENOMEM;
  57
  58                 link->cpus      = &dlc[0];
  59                 link->platforms = &dlc[1];
  60
  61                 link->num_cpus          = 1;
  62                 link->num_platforms     = 1;
  63
  64                 ret = of_property_read_string(np, "link-name", &link->name);
  65                 if (ret) {
  66                         dev_err(card->dev, "error getting codec dai_link name\n");
  67                         goto err;
  68                 }
  69
  70                 cpu = of_get_child_by_name(np, "cpu");
  71                 platform = of_get_child_by_name(np, "platform");
  72                 codec = of_get_child_by_name(np, "codec");
  73
  74                 if (!cpu) {
  75                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  76                         ret = -EINVAL;
  77                         goto err;
  78                 }
  79
  80                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  81                                         "#sound-dai-cells", 0, &args);
  82                 if (ret) {
  83                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  84                         goto err;
  85                 }
  86                 link->cpus->of_node = args.np;
  87                 link->id = args.args[0];
  88
  89                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  90                 if (ret) {
  91                         if (ret != -EPROBE_DEFER)
  92                                 dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
  93                                         link->name, ret);
  94                         goto err;
  95                 }
  96
  97                 if (platform) {
  98                         link->platforms->of_node = of_parse_phandle(platform,
  99                                         "sound-dai",
 100                                         0);
 101                         if (!link->platforms->of_node) {
 102                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
 103                                 ret = -EINVAL;
 104                                 goto err;
 105                         }
 106                 } else {
 107                         link->platforms->of_node = link->cpus->of_node;
 108                 }
 109
 110                 if (codec) {
 111                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
 112                         if (ret < 0) {
 113                                 if (ret != -EPROBE_DEFER)
 114                                         dev_err(card->dev, "%s: codec dai not found: %d\n",
 115                                                 link->name, ret);
 116                                 goto err;
 117                         }
 118
 119                         if (platform) {
 120                                 /* DPCM backend */
 121                                 link->no_pcm = 1;
 122                                 link->ignore_pmdown_time = 1;
 123                         }
 124                 } else {
 125                         /* DPCM frontend */
 126                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 127                         if (!dlc)
 128                                 return -ENOMEM;
 129
 130                         link->codecs     = dlc;
 131                         link->num_codecs = 1;
 132
 133                         link->codecs->dai_name = "snd-soc-dummy-dai";
 134                         link->codecs->name = "snd-soc-dummy";
 135                         link->dynamic = 1;
 136                 }
 137
 138                 if (platform || !codec) {
 139                         /* DPCM */
 140                         snd_soc_dai_link_set_capabilities(link);
 141                         link->ignore_suspend = 1;
 142                         link->nonatomic = 1;
 143                 }
 144
 145                 link->stream_name = link->name;
 146                 link++;
 147
 148                 of_node_put(cpu);
 149                 of_node_put(codec);
 150                 of_node_put(platform);
 151         }
 152
 153         return 0;
 154 err:
 155         of_node_put(np);
 156         of_node_put(cpu);
 157         of_node_put(codec);
 158         of_node_put(platform);
 159         return ret;
 160 }
 161 EXPORT_SYMBOL(qcom_snd_parse_of);
 162
 163 MODULE_LICENSE("GPL v2");