LXR linux/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
   8int 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                cpu = of_get_child_by_name(np, "cpu");
  57                platform = of_get_child_by_name(np, "platform");
  58                codec = of_get_child_by_name(np, "codec");
  59
  60                if (!cpu) {
  61                        dev_err(dev, "Can't find cpu DT node\n");
  62                        ret = -EINVAL;
  63                        goto err;
  64                }
  65
  66                ret = of_parse_phandle_with_args(cpu, "sound-dai",
  67                                        "#sound-dai-cells", 0, &args);
  68                if (ret) {
  69                        dev_err(card->dev, "error getting cpu phandle\n");
  70                        goto err;
  71                }
  72                link->cpus->of_node = args.np;
  73                link->id = args.args[0];
  74
  75                ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
  76                if (ret) {
  77                        dev_err(card->dev, "error getting cpu dai name\n");
  78                        goto err;
  79                }
  80
  81                if (codec && platform) {
  82                        link->platforms->of_node = of_parse_phandle(platform,
  83                                        "sound-dai",
  84                                        0);
  85                        if (!link->platforms->of_node) {
  86                                dev_err(card->dev, "platform dai not found\n");
  87                                ret = -EINVAL;
  88                                goto err;
  89                        }
  90
  91                        ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  92                        if (ret < 0) {
  93                                dev_err(card->dev, "codec dai not found\n");
  94                                goto err;
  95                        }
  96                        link->no_pcm = 1;
  97                        link->ignore_pmdown_time = 1;
  98                } else {
  99                        dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
 100                        if (!dlc)
 101                                return -ENOMEM;
 102
 103                        link->codecs     = dlc;
 104                        link->num_codecs = 1;
 105
 106                        link->platforms->of_node = link->cpus->of_node;
 107                        link->codecs->dai_name = "snd-soc-dummy-dai";
 108                        link->codecs->name = "snd-soc-dummy";
 109                        link->dynamic = 1;
 110                }
 111
 112                link->ignore_suspend = 1;
 113                ret = of_property_read_string(np, "link-name", &link->name);
 114                if (ret) {
 115                        dev_err(card->dev, "error getting codec dai_link name\n");
 116                        goto err;
 117                }
 118
 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;
 131err:
 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}
 139EXPORT_SYMBOL(qcom_snd_parse_of);
 140
 141MODULE_LICENSE("GPL v2");
 142