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 return -ENOMEM; 57 58 link->cpus = &dlc[0]; 59 link->platforms = &dlc[1]; 60 61 link->num_cpus = 1; 62 link->num_platforms = 1; 63 64 ret = of_property_read_string(np, "link-name", &link->name); 65 if (ret) { 66 dev_err(card->dev, "error getting codec dai_link name\n"); 67 goto err; 68 } 69 70 cpu = of_get_child_by_name(np, "cpu"); 71 platform = of_get_child_by_name(np, "platform"); 72 codec = of_get_child_by_name(np, "codec"); 73 74 if (!cpu) { 75 dev_err(dev, "%s: Can't find cpu DT node\n", link->name); 76 ret = -EINVAL; 77 goto err; 78 } 79 80 ret = of_parse_phandle_with_args(cpu, "sound-dai", 81 "#sound-dai-cells", 0, &args); 82 if (ret) { 83 dev_err(card->dev, "%s: error getting cpu phandle\n", link->name); 84 goto err; 85 } 86 link->cpus->of_node = args.np; 87 link->id = args.args[0]; 88 89 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); 90 if (ret) { 91 if (ret != -EPROBE_DEFER) 92 dev_err(card->dev, "%s: error getting cpu dai name: %d\n", 93 link->name, ret); 94 goto err; 95 } 96 97 if (platform) { 98 link->platforms->of_node = of_parse_phandle(platform, 99 "sound-dai", 100 0); 101 if (!link->platforms->of_node) { 102 dev_err(card->dev, "%s: platform dai not found\n", link->name); 103 ret = -EINVAL; 104 goto err; 105 } 106 } else { 107 link->platforms->of_node = link->cpus->of_node; 108 } 109 110 if (codec) { 111 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 112 if (ret < 0) { 113 if (ret != -EPROBE_DEFER) 114 dev_err(card->dev, "%s: codec dai not found: %d\n", 115 link->name, ret); 116 goto err; 117 } 118 119 if (platform) { 120 /* DPCM backend */ 121 link->no_pcm = 1; 122 link->ignore_pmdown_time = 1; 123 } 124 } else { 125 /* DPCM frontend */ 126 dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); 127 if (!dlc) 128 return -ENOMEM; 129 130 link->codecs = dlc; 131 link->num_codecs = 1; 132 133 link->codecs->dai_name = "snd-soc-dummy-dai"; 134 link->codecs->name = "snd-soc-dummy"; 135 link->dynamic = 1; 136 } 137 138 if (platform || !codec) { 139 /* DPCM */ 140 snd_soc_dai_link_set_capabilities(link); 141 link->ignore_suspend = 1; 142 link->nonatomic = 1; 143 } 144 145 link->stream_name = link->name; 146 link++; 147 148 of_node_put(cpu); 149 of_node_put(codec); 150 of_node_put(platform); 151 } 152 153 return 0; 154 err: 155 of_node_put(np); 156 of_node_put(cpu); 157 of_node_put(codec); 158 of_node_put(platform); 159 return ret; 160 } 161 EXPORT_SYMBOL(qcom_snd_parse_of); 162 163 MODULE_LICENSE("GPL v2"); 164