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
qcom_snd_parse_of(struct snd_soc_card * card)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
