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         int ret, num_links;
  18
  19         ret = snd_soc_of_parse_card_name(card, "model");
  20         if (ret) {
  21                 dev_err(dev, "Error parsing card name: %d\n", ret);
  22                 return ret;
  23         }
  24
  25         /* DAPM routes */
  26         if (of_property_read_bool(dev->of_node, "audio-routing")) {
  27                 ret = snd_soc_of_parse_audio_routing(card,
  28                                 "audio-routing");
  29                 if (ret)
  30                         return ret;
  31         }
  32
  33         /* Populate links */
  34         num_links = of_get_child_count(dev->of_node);
  35
  36         /* Allocate the DAI link array */
  37         card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
  38         if (!card->dai_link)
  39                 return -ENOMEM;
  40
  41         card->num_links = num_links;
  42         link = card->dai_link;
  43         for_each_child_of_node(dev->of_node, np) {
  44                 cpu = of_get_child_by_name(np, "cpu");
  45                 platform = of_get_child_by_name(np, "platform");
  46                 codec = of_get_child_by_name(np, "codec");
  47
  48                 if (!cpu) {
  49                         dev_err(dev, "Can't find cpu DT node\n");
  50                         ret = -EINVAL;
  51                         goto err;
  52                 }
  53
  54                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  55                                         "#sound-dai-cells", 0, &args);
  56                 if (ret) {
  57                         dev_err(card->dev, "error getting cpu phandle\n");
  58                         goto err;
  59                 }
  60                 link->cpu_of_node = args.np;
  61                 link->id = args.args[0];
  62
  63                 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
  64                 if (ret) {
  65                         dev_err(card->dev, "error getting cpu dai name\n");
  66                         goto err;
  67                 }
  68
  69                 if (codec && platform) {
  70                         link->platform_of_node = of_parse_phandle(platform,
  71                                         "sound-dai",
  72                                         0);
  73                         if (!link->platform_of_node) {
  74                                 dev_err(card->dev, "platform dai not found\n");
  75                                 ret = -EINVAL;
  76                                 goto err;
  77                         }
  78
  79                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  80                         if (ret < 0) {
  81                                 dev_err(card->dev, "codec dai not found\n");
  82                                 goto err;
  83                         }
  84                         link->no_pcm = 1;
  85                         link->ignore_pmdown_time = 1;
  86                 } else {
  87                         link->platform_of_node = link->cpu_of_node;
  88                         link->codec_dai_name = "snd-soc-dummy-dai";
  89                         link->codec_name = "snd-soc-dummy";
  90                         link->dynamic = 1;
  91                 }
  92
  93                 link->ignore_suspend = 1;
  94                 ret = of_property_read_string(np, "link-name", &link->name);
  95                 if (ret) {
  96                         dev_err(card->dev, "error getting codec dai_link name\n");
  97                         goto err;
  98                 }
  99
 100                 link->dpcm_playback = 1;
 101                 link->dpcm_capture = 1;
 102                 link->stream_name = link->name;
 103                 link++;
 104
 105                 of_node_put(cpu);
 106                 of_node_put(codec);
 107                 of_node_put(platform);
 108         }
 109
 110         return 0;
 111 err:
 112         of_node_put(np);
 113         of_node_put(cpu);
 114         of_node_put(codec);
 115         of_node_put(platform);
 116         kfree(card->dai_link);
 117         return ret;
 118 }
 119 EXPORT_SYMBOL(qcom_snd_parse_of);
 120
 121 MODULE_LICENSE("GPL v2");