soc/qcom/common.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 // Copyright (c) 2018, Linaro Limited.
0003 // Copyright (c) 2018, The Linux Foundation. All rights reserved.
0004
0005 #include <linux/module.h>
0006 #include "common.h"
0007
0008 int qcom_snd_parse_of(struct snd_soc_card *card)
0009 {
0010     struct device_node *np;
0011     struct device_node *codec = NULL;
0012     struct device_node *platform = NULL;
0013     struct device_node *cpu = NULL;
0014     struct device *dev = card->dev;
0015     struct snd_soc_dai_link *link;
0016     struct of_phandle_args args;
0017     struct snd_soc_dai_link_component *dlc;
0018     int ret, num_links;
0019
0020     ret = snd_soc_of_parse_card_name(card, "model");
0021     if (ret == 0 && !card->name)
0022         /* Deprecated, only for compatibility with old device trees */
0023         ret = snd_soc_of_parse_card_name(card, "qcom,model");
0024     if (ret) {
0025         dev_err(dev, "Error parsing card name: %d\n", ret);
0026         return ret;
0027     }
0028
0029     if (of_property_read_bool(dev->of_node, "widgets")) {
0030         ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets");
0031         if (ret)
0032             return ret;
0033     }
0034
0035     /* DAPM routes */
0036     if (of_property_read_bool(dev->of_node, "audio-routing")) {
0037         ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
0038         if (ret)
0039             return ret;
0040     }
0041     /* Deprecated, only for compatibility with old device trees */
0042     if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
0043         ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing");
0044         if (ret)
0045             return ret;
0046     }
0047
0048     ret = snd_soc_of_parse_pin_switches(card, "pin-switches");
0049     if (ret)
0050         return ret;
0051
0052     ret = snd_soc_of_parse_aux_devs(card, "aux-devs");
0053     if (ret)
0054         return ret;
0055
0056     /* Populate links */
0057     num_links = of_get_available_child_count(dev->of_node);
0058
0059     /* Allocate the DAI link array */
0060     card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
0061     if (!card->dai_link)
0062         return -ENOMEM;
0063
0064     card->num_links = num_links;
0065     link = card->dai_link;
0066
0067     for_each_available_child_of_node(dev->of_node, np) {
0068         dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
0069         if (!dlc) {
0070             ret = -ENOMEM;
0071             goto err_put_np;
0072         }
0073
0074         link->cpus  = &dlc[0];
0075         link->platforms = &dlc[1];
0076
0077         link->num_cpus      = 1;
0078         link->num_platforms = 1;
0079
0080         ret = of_property_read_string(np, "link-name", &link->name);
0081         if (ret) {
0082             dev_err(card->dev, "error getting codec dai_link name\n");
0083             goto err_put_np;
0084         }
0085
0086         cpu = of_get_child_by_name(np, "cpu");
0087         platform = of_get_child_by_name(np, "platform");
0088         codec = of_get_child_by_name(np, "codec");
0089
0090         if (!cpu) {
0091             dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
0092             ret = -EINVAL;
0093             goto err;
0094         }
0095
0096         ret = of_parse_phandle_with_args(cpu, "sound-dai",
0097                     "#sound-dai-cells", 0, &args);
0098         if (ret) {
0099             dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
0100             goto err;
0101         }
0102         link->cpus->of_node = args.np;
0103         link->id = args.args[0];
0104
0105         ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
0106         if (ret) {
0107             dev_err_probe(card->dev, ret,
0108                       "%s: error getting cpu dai name\n", link->name);
0109             goto err;
0110         }
0111
0112         if (platform) {
0113             link->platforms->of_node = of_parse_phandle(platform,
0114                     "sound-dai",
0115                     0);
0116             if (!link->platforms->of_node) {
0117                 dev_err(card->dev, "%s: platform dai not found\n", link->name);
0118                 ret = -EINVAL;
0119                 goto err;
0120             }
0121         } else {
0122             link->platforms->of_node = link->cpus->of_node;
0123         }
0124
0125         if (codec) {
0126             ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
0127             if (ret < 0) {
0128                 dev_err_probe(card->dev, ret,
0129                           "%s: codec dai not found\n", link->name);
0130                 goto err;
0131             }
0132
0133             if (platform) {
0134                 /* DPCM backend */
0135                 link->no_pcm = 1;
0136                 link->ignore_pmdown_time = 1;
0137             }
0138         } else {
0139             /* DPCM frontend */
0140             dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
0141             if (!dlc) {
0142                 ret = -ENOMEM;
0143                 goto err;
0144             }
0145
0146             link->codecs     = dlc;
0147             link->num_codecs = 1;
0148
0149             link->codecs->dai_name = "snd-soc-dummy-dai";
0150             link->codecs->name = "snd-soc-dummy";
0151             link->dynamic = 1;
0152         }
0153
0154         if (platform || !codec) {
0155             /* DPCM */
0156             snd_soc_dai_link_set_capabilities(link);
0157             link->ignore_suspend = 1;
0158             link->nonatomic = 1;
0159         }
0160
0161         link->stream_name = link->name;
0162         link++;
0163
0164         of_node_put(cpu);
0165         of_node_put(codec);
0166         of_node_put(platform);
0167     }
0168
0169     return 0;
0170 err:
0171     of_node_put(cpu);
0172     of_node_put(codec);
0173     of_node_put(platform);
0174 err_put_np:
0175     of_node_put(np);
0176     return ret;
0177 }
0178 EXPORT_SYMBOL(qcom_snd_parse_of);
0179
0180 MODULE_LICENSE("GPL v2");