root/sound/soc/qcom/common.c

DEFINITIONS

1. qcom_snd_parse_of

   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) {
  22                 dev_err(dev, "Error parsing card name: %d\n", ret);
  23                 return ret;
  24         }
  25 
  26         /* DAPM routes */
  27         if (of_property_read_bool(dev->of_node, "audio-routing")) {
  28                 ret = snd_soc_of_parse_audio_routing(card,
  29                                 "audio-routing");
  30                 if (ret)
  31                         return ret;
  32         }
  33 
  34         /* Populate links */
  35         num_links = of_get_child_count(dev->of_node);
  36 
  37         /* Allocate the DAI link array */
  38         card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
  39         if (!card->dai_link)
  40                 return -ENOMEM;
  41 
  42         card->num_links = num_links;
  43         link = card->dai_link;
  44 
  45         for_each_child_of_node(dev->of_node, np) {
  46                 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
  47                 if (!dlc)
  48                         return -ENOMEM;
  49 
  50                 link->cpus      = &dlc[0];
  51                 link->platforms = &dlc[1];
  52 
  53                 link->num_cpus          = 1;
  54                 link->num_platforms     = 1;
  55 
  56                 ret = of_property_read_string(np, "link-name", &link->name);
  57                 if (ret) {
  58                         dev_err(card->dev, "error getting codec dai_link name\n");
  59                         goto err;
  60                 }
  61 
  62                 cpu = of_get_child_by_name(np, "cpu");
  63                 platform = of_get_child_by_name(np, "platform");
  64                 codec = of_get_child_by_name(np, "codec");
  65 
  66                 if (!cpu) {
  67                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  68                         ret = -EINVAL;
  69                         goto err;
  70                 }
  71 
  72                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  73                                         "#sound-dai-cells", 0, &args);
  74                 if (ret) {
  75                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  76                         goto err;
  77                 }
  78                 link->cpus->of_node = args.np;
  79                 link->id = args.args[0];
  80 
  81                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  82                 if (ret) {
  83                         dev_err(card->dev, "%s: error getting cpu dai name\n", link->name);
  84                         goto err;
  85                 }
  86 
  87                 if (codec && platform) {
  88                         link->platforms->of_node = of_parse_phandle(platform,
  89                                         "sound-dai",
  90                                         0);
  91                         if (!link->platforms->of_node) {
  92                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
  93                                 ret = -EINVAL;
  94                                 goto err;
  95                         }
  96 
  97                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  98                         if (ret < 0) {
  99                                 dev_err(card->dev, "%s: codec dai not found\n", link->name);
 100                                 goto err;
 101                         }
 102                         link->no_pcm = 1;
 103                         link->ignore_pmdown_time = 1;
 104                 } else {
 105                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 106                         if (!dlc)
 107                                 return -ENOMEM;
 108 
 109                         link->codecs     = dlc;
 110                         link->num_codecs = 1;
 111 
 112                         link->platforms->of_node = link->cpus->of_node;
 113                         link->codecs->dai_name = "snd-soc-dummy-dai";
 114                         link->codecs->name = "snd-soc-dummy";
 115                         link->dynamic = 1;
 116                 }
 117 
 118                 link->ignore_suspend = 1;
 119                 link->nonatomic = 1;
 120                 link->dpcm_playback = 1;
 121                 link->dpcm_capture = 1;
 122                 link->stream_name = link->name;
 123                 link++;
 124 
 125                 of_node_put(cpu);
 126                 of_node_put(codec);
 127                 of_node_put(platform);
 128         }
 129 
 130         return 0;
 131 err:
 132         of_node_put(np);
 133         of_node_put(cpu);
 134         of_node_put(codec);
 135         of_node_put(platform);
 136         kfree(card->dai_link);
 137         return ret;
 138 }
 139 EXPORT_SYMBOL(qcom_snd_parse_of);
 140 
 141 MODULE_LICENSE("GPL v2");