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 #include "qdsp6/q6afe.h"
   8
   9 int qcom_snd_parse_of(struct snd_soc_card *card)
  10 {
  11         struct device_node *np;
  12         struct device_node *codec = NULL;
  13         struct device_node *platform = NULL;
  14         struct device_node *cpu = NULL;
  15         struct device *dev = card->dev;
  16         struct snd_soc_dai_link *link;
  17         struct of_phandle_args args;
  18         struct snd_soc_dai_link_component *dlc;
  19         int ret, num_links;
  20
  21         ret = snd_soc_of_parse_card_name(card, "model");
  22         if (ret) {
  23                 dev_err(dev, "Error parsing card name: %d\n", ret);
  24                 return ret;
  25         }
  26
  27         /* DAPM routes */
  28         if (of_property_read_bool(dev->of_node, "audio-routing")) {
  29                 ret = snd_soc_of_parse_audio_routing(card,
  30                                 "audio-routing");
  31                 if (ret)
  32                         return ret;
  33         }
  34
  35         /* Populate links */
  36         num_links = of_get_child_count(dev->of_node);
  37
  38         /* Allocate the DAI link array */
  39         card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
  40         if (!card->dai_link)
  41                 return -ENOMEM;
  42
  43         card->num_links = num_links;
  44         link = card->dai_link;
  45
  46         for_each_child_of_node(dev->of_node, np) {
  47                 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
  48                 if (!dlc)
  49                         return -ENOMEM;
  50
  51                 link->cpus      = &dlc[0];
  52                 link->platforms = &dlc[1];
  53
  54                 link->num_cpus          = 1;
  55                 link->num_platforms     = 1;
  56
  57                 ret = of_property_read_string(np, "link-name", &link->name);
  58                 if (ret) {
  59                         dev_err(card->dev, "error getting codec dai_link name\n");
  60                         goto err;
  61                 }
  62
  63                 cpu = of_get_child_by_name(np, "cpu");
  64                 platform = of_get_child_by_name(np, "platform");
  65                 codec = of_get_child_by_name(np, "codec");
  66
  67                 if (!cpu) {
  68                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  69                         ret = -EINVAL;
  70                         goto err;
  71                 }
  72
  73                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  74                                         "#sound-dai-cells", 0, &args);
  75                 if (ret) {
  76                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  77                         goto err;
  78                 }
  79                 link->cpus->of_node = args.np;
  80                 link->id = args.args[0];
  81
  82                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  83                 if (ret) {
  84                         dev_err(card->dev, "%s: error getting cpu dai name\n", link->name);
  85                         goto err;
  86                 }
  87
  88                 if (codec && platform) {
  89                         link->platforms->of_node = of_parse_phandle(platform,
  90                                         "sound-dai",
  91                                         0);
  92                         if (!link->platforms->of_node) {
  93                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
  94                                 ret = -EINVAL;
  95                                 goto err;
  96                         }
  97
  98                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  99                         if (ret < 0) {
 100                                 dev_err(card->dev, "%s: codec dai not found\n", link->name);
 101                                 goto err;
 102                         }
 103                         link->no_pcm = 1;
 104                         link->ignore_pmdown_time = 1;
 105
 106                         if (q6afe_is_rx_port(link->id)) {
 107                                 link->dpcm_playback = 1;
 108                                 link->dpcm_capture = 0;
 109                         } else {
 110                                 link->dpcm_playback = 0;
 111                                 link->dpcm_capture = 1;
 112                         }
 113
 114                 } else {
 115                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 116                         if (!dlc)
 117                                 return -ENOMEM;
 118
 119                         link->codecs     = dlc;
 120                         link->num_codecs = 1;
 121
 122                         link->platforms->of_node = link->cpus->of_node;
 123                         link->codecs->dai_name = "snd-soc-dummy-dai";
 124                         link->codecs->name = "snd-soc-dummy";
 125                         link->dynamic = 1;
 126                         link->dpcm_playback = 1;
 127                         link->dpcm_capture = 1;
 128                 }
 129
 130                 link->ignore_suspend = 1;
 131                 link->nonatomic = 1;
 132                 link->stream_name = link->name;
 133                 link++;
 134
 135                 of_node_put(cpu);
 136                 of_node_put(codec);
 137                 of_node_put(platform);
 138         }
 139
 140         return 0;
 141 err:
 142         of_node_put(np);
 143         of_node_put(cpu);
 144         of_node_put(codec);
 145         of_node_put(platform);
 146         kfree(card->dai_link);
 147         return ret;
 148 }
 149 EXPORT_SYMBOL(qcom_snd_parse_of);
 150
 151 MODULE_LICENSE("GPL v2");