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