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 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; 131 err: 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 } 139 EXPORT_SYMBOL(qcom_snd_parse_of); 140 141 MODULE_LICENSE("GPL v2"); 142