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                         ret = -ENOMEM;
  50                         goto err;
  51                 }
  52
  53                 link->cpus      = &dlc[0];
  54                 link->platforms = &dlc[1];
  55
  56                 link->num_cpus          = 1;
  57                 link->num_platforms     = 1;
  58
  59                 ret = of_property_read_string(np, "link-name", &link->name);
  60                 if (ret) {
  61                         dev_err(card->dev, "error getting codec dai_link name\n");
  62                         goto err;
  63                 }
  64
  65                 cpu = of_get_child_by_name(np, "cpu");
  66                 platform = of_get_child_by_name(np, "platform");
  67                 codec = of_get_child_by_name(np, "codec");
  68
  69                 if (!cpu) {
  70                         dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
  71                         ret = -EINVAL;
  72                         goto err;
  73                 }
  74
  75                 ret = of_parse_phandle_with_args(cpu, "sound-dai",
  76                                         "#sound-dai-cells", 0, &args);
  77                 if (ret) {
  78                         dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
  79                         goto err;
  80                 }
  81                 link->cpus->of_node = args.np;
  82                 link->id = args.args[0];
  83
  84                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  85                 if (ret) {
  86                         dev_err(card->dev, "%s: error getting cpu dai name\n", link->name);
  87                         goto err;
  88                 }
  89
  90                 if (codec && platform) {
  91                         link->platforms->of_node = of_parse_phandle(platform,
  92                                         "sound-dai",
  93                                         0);
  94                         if (!link->platforms->of_node) {
  95                                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
  96                                 ret = -EINVAL;
  97                                 goto err;
  98                         }
  99
 100                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
 101                         if (ret < 0) {
 102                                 dev_err(card->dev, "%s: codec dai not found\n", link->name);
 103                                 goto err;
 104                         }
 105                         link->no_pcm = 1;
 106                         link->ignore_pmdown_time = 1;
 107
 108                         if (q6afe_is_rx_port(link->id)) {
 109                                 link->dpcm_playback = 1;
 110                                 link->dpcm_capture = 0;
 111                         } else {
 112                                 link->dpcm_playback = 0;
 113                                 link->dpcm_capture = 1;
 114                         }
 115
 116                 } else {
 117                         dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 118                         if (!dlc)
 119                                 return -ENOMEM;
 120
 121                         link->codecs     = dlc;
 122                         link->num_codecs = 1;
 123
 124                         link->platforms->of_node = link->cpus->of_node;
 125                         link->codecs->dai_name = "snd-soc-dummy-dai";
 126                         link->codecs->name = "snd-soc-dummy";
 127                         link->dynamic = 1;
 128                         link->dpcm_playback = 1;
 129                         link->dpcm_capture = 1;
 130                 }
 131
 132                 link->ignore_suspend = 1;
 133                 link->nonatomic = 1;
 134                 link->stream_name = link->name;
 135                 link++;
 136
 137                 of_node_put(cpu);
 138                 of_node_put(codec);
 139                 of_node_put(platform);
 140         }
 141
 142         return 0;
 143 err:
 144         of_node_put(np);
 145         of_node_put(cpu);
 146         of_node_put(codec);
 147         of_node_put(platform);
 148         kfree(card->dai_link);
 149         return ret;
 150 }
 151 EXPORT_SYMBOL(qcom_snd_parse_of);
 152
 153 MODULE_LICENSE("GPL v2");