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 int ret, num_links; 18 19 ret = snd_soc_of_parse_card_name(card, "model"); 20 if (ret) { 21 dev_err(dev, "Error parsing card name: %d\n", ret); 22 return ret; 23 } 24 25 /* DAPM routes */ 26 if (of_property_read_bool(dev->of_node, "audio-routing")) { 27 ret = snd_soc_of_parse_audio_routing(card, 28 "audio-routing"); 29 if (ret) 30 return ret; 31 } 32 33 /* Populate links */ 34 num_links = of_get_child_count(dev->of_node); 35 36 /* Allocate the DAI link array */ 37 card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL); 38 if (!card->dai_link) 39 return -ENOMEM; 40 41 card->num_links = num_links; 42 link = card->dai_link; 43 for_each_child_of_node(dev->of_node, np) { 44 cpu = of_get_child_by_name(np, "cpu"); 45 platform = of_get_child_by_name(np, "platform"); 46 codec = of_get_child_by_name(np, "codec"); 47 48 if (!cpu) { 49 dev_err(dev, "Can't find cpu DT node\n"); 50 ret = -EINVAL; 51 goto err; 52 } 53 54 ret = of_parse_phandle_with_args(cpu, "sound-dai", 55 "#sound-dai-cells", 0, &args); 56 if (ret) { 57 dev_err(card->dev, "error getting cpu phandle\n"); 58 goto err; 59 } 60 link->cpu_of_node = args.np; 61 link->id = args.args[0]; 62 63 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name); 64 if (ret) { 65 dev_err(card->dev, "error getting cpu dai name\n"); 66 goto err; 67 } 68 69 if (codec && platform) { 70 link->platform_of_node = of_parse_phandle(platform, 71 "sound-dai", 72 0); 73 if (!link->platform_of_node) { 74 dev_err(card->dev, "platform dai not found\n"); 75 ret = -EINVAL; 76 goto err; 77 } 78 79 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); 80 if (ret < 0) { 81 dev_err(card->dev, "codec dai not found\n"); 82 goto err; 83 } 84 link->no_pcm = 1; 85 link->ignore_pmdown_time = 1; 86 } else { 87 link->platform_of_node = link->cpu_of_node; 88 link->codec_dai_name = "snd-soc-dummy-dai"; 89 link->codec_name = "snd-soc-dummy"; 90 link->dynamic = 1; 91 } 92 93 link->ignore_suspend = 1; 94 ret = of_property_read_string(np, "link-name", &link->name); 95 if (ret) { 96 dev_err(card->dev, "error getting codec dai_link name\n"); 97 goto err; 98 } 99 100 link->dpcm_playback = 1; 101 link->dpcm_capture = 1; 102 link->stream_name = link->name; 103 link++; 104 105 of_node_put(cpu); 106 of_node_put(codec); 107 of_node_put(platform); 108 } 109 110 return 0; 111 err: 112 of_node_put(np); 113 of_node_put(cpu); 114 of_node_put(codec); 115 of_node_put(platform); 116 kfree(card->dai_link); 117 return ret; 118 } 119 EXPORT_SYMBOL(qcom_snd_parse_of); 120 121 MODULE_LICENSE("GPL v2"); 122