1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018, Linaro Limited.
// Copyright (c) 2018, The Linux Foundation. All rights reserved.
#include <linux/module.h>
#include "common.h"
int qcom_snd_parse_of(struct snd_soc_card *card)
{
struct device_node *np;
struct device_node *codec = NULL;
struct device_node *platform = NULL;
struct device_node *cpu = NULL;
struct device *dev = card->dev;
struct snd_soc_dai_link *link;
struct of_phandle_args args;
struct snd_soc_dai_link_component *dlc;
int ret, num_links;
ret = snd_soc_of_parse_card_name(card, "model");
if (ret == 0 && !card->name)
/* Deprecated, only for compatibility with old device trees */
ret = snd_soc_of_parse_card_name(card, "qcom,model");
if (ret) {
dev_err(dev, "Error parsing card name: %d\n", ret);
return ret;
}
/* DAPM routes */
if (of_property_read_bool(dev->of_node, "audio-routing")) {
ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
if (ret)
return ret;
}
/* Deprecated, only for compatibility with old device trees */
if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing");
if (ret)
return ret;
}
/* Populate links */
num_links = of_get_child_count(dev->of_node);
/* Allocate the DAI link array */
card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
if (!card->dai_link)
return -ENOMEM;
card->num_links = num_links;
link = card->dai_link;
for_each_child_of_node(dev->of_node, np) {
dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
link->cpus = &dlc[0];
link->platforms = &dlc[1];
link->num_cpus = 1;
link->num_platforms = 1;
ret = of_property_read_string(np, "link-name", &link->name);
if (ret) {
dev_err(card->dev, "error getting codec dai_link name\n");
goto err;
}
cpu = of_get_child_by_name(np, "cpu");
platform = of_get_child_by_name(np, "platform");
codec = of_get_child_by_name(np, "codec");
if (!cpu) {
dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
ret = -EINVAL;
goto err;
}
ret = of_parse_phandle_with_args(cpu, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret) {
dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
goto err;
}
link->cpus->of_node = args.np;
link->id = args.args[0];
ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
link->name, ret);
goto err;
}
if (platform) {
link->platforms->of_node = of_parse_phandle(platform,
"sound-dai",
0);
if (!link->platforms->of_node) {
dev_err(card->dev, "%s: platform dai not found\n", link->name);
ret = -EINVAL;
goto err;
}
} else {
link->platforms->of_node = link->cpus->of_node;
}
if (codec) {
ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(card->dev, "%s: codec dai not found: %d\n",
link->name, ret);
goto err;
}
if (platform) {
/* DPCM backend */
link->no_pcm = 1;
link->ignore_pmdown_time = 1;
}
} else {
/* DPCM frontend */
dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
link->codecs = dlc;
link->num_codecs = 1;
link->codecs->dai_name = "snd-soc-dummy-dai";
link->codecs->name = "snd-soc-dummy";
link->dynamic = 1;
}
if (platform || !codec) {
/* DPCM */
snd_soc_dai_link_set_capabilities(link);
link->ignore_suspend = 1;
link->nonatomic = 1;
}
link->stream_name = link->name;
link++;
of_node_put(cpu);
of_node_put(codec);
of_node_put(platform);
}
return 0;
err:
of_node_put(np);
of_node_put(cpu);
of_node_put(codec);
of_node_put(platform);
return ret;
}
EXPORT_SYMBOL(qcom_snd_parse_of);
MODULE_LICENSE("GPL v2");
|
