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 if (of_property_read_bool(dev->of_node, "widgets")) { 30 ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets"); 31 if (ret) 32 return ret; 33 } 34 35 /* DAPM routes */ 36 if (of_property_read_bool(dev->of_node, "audio-routing")) { 37 ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); 38 if (ret) 39 return ret; 40 } 41 /* Deprecated, only for compatibility with old device trees */ 42 if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) { 43 ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing"); 44 if (ret) 45 return ret; 46 } 47 48 ret = snd_soc_of_parse_pin_switches(card, "pin-switches"); 49 if (ret) 50 return ret; 51 52 ret = snd_soc_of_parse_aux_devs(card, "aux-devs"); 53 if (ret) 54 return ret; 55 56 /* Populate links */ 57 num_links = of_get_available_child_count(dev->of_node); 58 59 /* Allocate the DAI link array */ 60 card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL); 61 if (!card->dai_link) 62 return -ENOMEM; 63 64 card->num_links = num_links; 65 link = card->dai_link; 66 67 for_each_available_child_of_node(dev->of_node, np) { 68 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); 69 if (!dlc) { 70 ret = -ENOMEM; 71 goto err_put_np; 72 } 73 74 link->cpus = &dlc[0]; 75 link->platforms = &dlc[1]; 76 77 link->num_cpus = 1; 78 link->num_platforms = 1; 79 80 ret = of_property_read_string(np, "link-name", &link->name); 81 if (ret) { 82 dev_err(card->dev, "error getting codec dai_link name\n"); 83 goto err_put_np; 84 } 85 86 cpu = of_get_child_by_name(np, "cpu"); 87 platform = of_get_child_by_name(np, "platform"); 88 codec = of_get_child_by_name(np, "codec"); 89 90 if (!cpu) { 91 dev_err(dev, "%s: Can't find cpu DT node\n", link->name); 92 ret = -EINVAL; 93 goto err; 94 } 95 96 ret = of_parse_phandle_with_args(cpu, "sound-dai", 97 "#sound-dai-cells", 0, &args); 98 if (ret) { 99 dev_err(card->dev, "%s: error getting cpu phandle\n", link->name); 100 goto err; 101 } 102 link->cpus->of_node = args.np; 103 link->id = args.args[0]; 104 105 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); 106 if (ret) { 107 dev_err_probe(card->dev, ret, 108 "%s: error getting cpu dai name\n", link->name); 109 goto err; 110 } 111 112 if (platform) { 113 link->platforms->of_node = of_parse_phandle(platform, 114 "sound-dai", 115 0); 116 if (!link->platforms->of_node) { 117 dev_err(card->dev, "%s: platform dai not found\n", link->name); 118 ret = -EINVAL; 119 goto err; 120 } 121 } else { 122 link->platforms->of_node = link->cpus->of_node; 123 } 124 125 if (codec) { 126 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 127 if (ret < 0) { 128 dev_err_probe(card->dev, ret, 129 "%s: codec dai not found\n", link->name); 130 goto err; 131 } 132 133 if (platform) { 134 /* DPCM backend */ 135 link->no_pcm = 1; 136 link->ignore_pmdown_time = 1; 137 } 138 } else { 139 /* DPCM frontend */ 140 dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); 141 if (!dlc) { 142 ret = -ENOMEM; 143 goto err; 144 } 145 146 link->codecs = dlc; 147 link->num_codecs = 1; 148 149 link->codecs->dai_name = "snd-soc-dummy-dai"; 150 link->codecs->name = "snd-soc-dummy"; 151 link->dynamic = 1; 152 } 153 154 if (platform || !codec) { 155 /* DPCM */ 156 snd_soc_dai_link_set_capabilities(link); 157 link->ignore_suspend = 1; 158 link->nonatomic = 1; 159 } 160 161 link->stream_name = link->name; 162 link++; 163 164 of_node_put(cpu); 165 of_node_put(codec); 166 of_node_put(platform); 167 } 168 169 return 0; 170 err: 171 of_node_put(cpu); 172 of_node_put(codec); 173 of_node_put(platform); 174 err_put_np: 175 of_node_put(np); 176 return ret; 177 } 178 EXPORT_SYMBOL(qcom_snd_parse_of); 179 180 MODULE_LICENSE("GPL v2"); 181