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                         ret = -ENOMEM;
  57                         goto err;
  58                 }
  59
  60                 link->cpus      = &dlc[0];
  61                 link->platforms = &dlc[1];
  62
  63                 link->num_cpus          = 1;
  64                 link->num_platforms     = 1;
  65
  66                 ret = of_property_read_string(np, "link-name", &link->name);
  67                 if (ret) {
  68                         dev_err(card->dev, "error getting codec dai_link name\n");
  69                         goto err;
  70                 }
  71
  72                 cpu = of_get_child_by_name(np, "cpu");
  73                 platform = of_get_child_by_name(np, "platform");
  74                 codec = of_get_child_by_name(np, "codec");
  75
  76                 if (!cpu) {
  77                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  78                         ret = -EINVAL;
  79                         goto err;
  80                 }
  81
  82                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  83                                         "#sound-dai-cells", 0, &args);
  84                 if (ret) {
  85                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  86                         goto err;
  87                 }
  88                 link->cpus->of_node = args.np;
  89                 link->id = args.args[0];
  90
  91                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  92                 if (ret) {
  93                         if (ret != -EPROBE_DEFER)
  94                                 dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
  95                                         link->name, ret);
  96                         goto err;
  97                 }
  98
  99                 if (platform) {
 100                         link->platforms->of_node = of_parse_phandle(platform,
 101                                         "sound-dai",
 102                                         0);
 103                         if (!link->platforms->of_node) {
 104                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
 105                                 ret = -EINVAL;
 106                                 goto err;
 107                         }
 108                 } else {
 109                         link->platforms->of_node = link->cpus->of_node;
 110                 }
 111
 112                 if (codec) {
 113                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
 114                         if (ret < 0) {
 115                                 if (ret != -EPROBE_DEFER)
 116                                         dev_err(card->dev, "%s: codec dai not found: %d\n",
 117                                                 link->name, ret);
 118                                 goto err;
 119                         }
 120
 121                         if (platform) {
 122                                 /* DPCM backend */
 123                                 link->no_pcm = 1;
 124                                 link->ignore_pmdown_time = 1;
 125                         }
 126                 } else {
 127                         /* DPCM frontend */
 128                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 129                         if (!dlc)
 130                                 return -ENOMEM;
 131
 132                         link->codecs     = dlc;
 133                         link->num_codecs = 1;
 134
 135                         link->codecs->dai_name = "snd-soc-dummy-dai";
 136                         link->codecs->name = "snd-soc-dummy";
 137                         link->dynamic = 1;
 138                 }
 139
 140                 if (platform || !codec) {
 141                         /* DPCM */
 142                         snd_soc_dai_link_set_capabilities(link);
 143                         link->ignore_suspend = 1;
 144                         link->nonatomic = 1;
 145                 }
 146
 147                 link->stream_name = link->name;
 148                 link++;
 149
 150                 of_node_put(cpu);
 151                 of_node_put(codec);
 152                 of_node_put(platform);
 153         }
 154
 155         return 0;
 156 err:
 157         of_node_put(np);
 158         of_node_put(cpu);
 159         of_node_put(codec);
 160         of_node_put(platform);
 161         return ret;
 162 }
 163 EXPORT_SYMBOL(qcom_snd_parse_of);
 164
 165 MODULE_LICENSE("GPL v2");