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         int ret, num_links;
  17
  18         ret = snd_soc_of_parse_card_name(card, "model");
  19         if (ret) {
  20                 dev_err(dev, "Error parsing card name: %d\n", ret);
  21                 return ret;
  22         }
  23
  24         /* DAPM routes */
  25         if (of_property_read_bool(dev->of_node, "audio-routing")) {
  26                 ret = snd_soc_of_parse_audio_routing(card,
  27                                 "audio-routing");
  28                 if (ret)
  29                         return ret;
  30         }
  31
  32         /* Populate links */
  33         num_links = of_get_child_count(dev->of_node);
  34
  35         /* Allocate the DAI link array */
  36         card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
  37         if (!card->dai_link)
  38                 return -ENOMEM;
  39
  40         card->num_links = num_links;
  41         link = card->dai_link;
  42         for_each_child_of_node(dev->of_node, np) {
  43                 cpu = of_get_child_by_name(np, "cpu");
  44                 if (!cpu) {
  45                         dev_err(dev, "Can't find cpu DT node\n");
  46                         ret = -EINVAL;
  47                         goto err;
  48                 }
  49
  50                 link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
  51                 if (!link->cpu_of_node) {
  52                         dev_err(card->dev, "error getting cpu phandle\n");
  53                         ret = -EINVAL;
  54                         goto err;
  55                 }
  56
  57                 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
  58                 if (ret) {
  59                         dev_err(card->dev, "error getting cpu dai name\n");
  60                         goto err;
  61                 }
  62
  63                 platform = of_get_child_by_name(np, "platform");
  64                 codec = of_get_child_by_name(np, "codec");
  65                 if (codec && platform) {
  66                         link->platform_of_node = of_parse_phandle(platform,
  67                                         "sound-dai",
  68                                         0);
  69                         if (!link->platform_of_node) {
  70                                 dev_err(card->dev, "platform dai not found\n");
  71                                 ret = -EINVAL;
  72                                 goto err;
  73                         }
  74
  75                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  76                         if (ret < 0) {
  77                                 dev_err(card->dev, "codec dai not found\n");
  78                                 goto err;
  79                         }
  80                         link->no_pcm = 1;
  81                         link->ignore_pmdown_time = 1;
  82                 } else {
  83                         link->platform_of_node = link->cpu_of_node;
  84                         link->codec_dai_name = "snd-soc-dummy-dai";
  85                         link->codec_name = "snd-soc-dummy";
  86                         link->dynamic = 1;
  87                 }
  88
  89                 link->ignore_suspend = 1;
  90                 ret = of_property_read_string(np, "link-name", &link->name);
  91                 if (ret) {
  92                         dev_err(card->dev, "error getting codec dai_link name\n");
  93                         goto err;
  94                 }
  95
  96                 link->dpcm_playback = 1;
  97                 link->dpcm_capture = 1;
  98                 link->stream_name = link->name;
  99                 link++;
 100         }
 101
 102         return 0;
 103 err:
 104         of_node_put(cpu);
 105         of_node_put(codec);
 106         of_node_put(platform);
 107         kfree(card->dai_link);
 108         return ret;
 109 }
 110 EXPORT_SYMBOL(qcom_snd_parse_of);
 111
 112 MODULE_LICENSE("GPL v2");