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 == 0 && !card->name) 22 /* Deprecated, only for compatibility with old device trees */ 23 ret = snd_soc_of_parse_card_name(card, "qcom,model"); 24 if (ret) { 25 dev_err(dev, "Error parsing card name: %d\n", ret); 26 return ret; 27 } 28 29 /* DAPM routes */ 30 if (of_property_read_bool(dev->of_node, "audio-routing")) { 31 ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); 32 if (ret) 33 return ret; 34 } 35 /* Deprecated, only for compatibility with old device trees */ 36 if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) { 37 ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing"); 38 if (ret) 39 return ret; 40 } 41 42 /* Populate links */ 43 num_links = of_get_child_count(dev->of_node); 44 45 /* Allocate the DAI link array */ 46 card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL); 47 if (!card->dai_link) 48 return -ENOMEM; 49 50 card->num_links = num_links; 51 link = card->dai_link; 52 53 for_each_child_of_node(dev->of_node, np) { 54 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); 55 if (!dlc) { 56 ret = -ENOMEM; 57 goto err; 58 } 59 60 link->cpus = &dlc[0]; 61 link->platforms = &dlc[1]; 62 63 link->num_cpus = 1; 64 link->num_platforms = 1; 65 66 ret = of_property_read_string(np, "link-name", &link->name); 67 if (ret) { 68 dev_err(card->dev, "error getting codec dai_link name\n"); 69 goto err; 70 } 71 72 cpu = of_get_child_by_name(np, "cpu"); 73 platform = of_get_child_by_name(np, "platform"); 74 codec = of_get_child_by_name(np, "codec"); 75 76 if (!cpu) { 77 dev_err(dev, "%s: Can't find cpu DT node\n", link->name); 78 ret = -EINVAL; 79 goto err; 80 } 81 82 ret = of_parse_phandle_with_args(cpu, "sound-dai", 83 "#sound-dai-cells", 0, &args); 84 if (ret) { 85 dev_err(card->dev, "%s: error getting cpu phandle\n", link->name); 86 goto err; 87 } 88 link->cpus->of_node = args.np; 89 link->id = args.args[0]; 90 91 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); 92 if (ret) { 93 if (ret != -EPROBE_DEFER) 94 dev_err(card->dev, "%s: error getting cpu dai name: %d\n", 95 link->name, ret); 96 goto err; 97 } 98 99 if (platform) { 100 link->platforms->of_node = of_parse_phandle(platform, 101 "sound-dai", 102 0); 103 if (!link->platforms->of_node) { 104 dev_err(card->dev, "%s: platform dai not found\n", link->name); 105 ret = -EINVAL; 106 goto err; 107 } 108 } else { 109 link->platforms->of_node = link->cpus->of_node; 110 } 111 112 if (codec) { 113 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 114 if (ret < 0) { 115 if (ret != -EPROBE_DEFER) 116 dev_err(card->dev, "%s: codec dai not found: %d\n", 117 link->name, ret); 118 goto err; 119 } 120 121 if (platform) { 122 /* DPCM backend */ 123 link->no_pcm = 1; 124 link->ignore_pmdown_time = 1; 125 } 126 } else { 127 /* DPCM frontend */ 128 dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); 129 if (!dlc) 130 return -ENOMEM; 131 132 link->codecs = dlc; 133 link->num_codecs = 1; 134 135 link->codecs->dai_name = "snd-soc-dummy-dai"; 136 link->codecs->name = "snd-soc-dummy"; 137 link->dynamic = 1; 138 } 139 140 if (platform || !codec) { 141 /* DPCM */ 142 snd_soc_dai_link_set_capabilities(link); 143 link->ignore_suspend = 1; 144 link->nonatomic = 1; 145 } 146 147 link->stream_name = link->name; 148 link++; 149 150 of_node_put(cpu); 151 of_node_put(codec); 152 of_node_put(platform); 153 } 154 155 return 0; 156 err: 157 of_node_put(np); 158 of_node_put(cpu); 159 of_node_put(codec); 160 of_node_put(platform); 161 return ret; 162 } 163 EXPORT_SYMBOL(qcom_snd_parse_of); 164 165 MODULE_LICENSE("GPL v2"); 166