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 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