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 int ret, num_links;
17
18 ret = snd_soc_of_parse_card_name(card, "model");
19 if (ret) {
20 dev_err(dev, "Error parsing card name: %d\n", ret);
21 return ret;
22 }
23
24 /* DAPM routes */
25 if (of_property_read_bool(dev->of_node, "audio-routing")) {
26 ret = snd_soc_of_parse_audio_routing(card,
27 "audio-routing");
28 if (ret)
29 return ret;
30 }
31
32 /* Populate links */
33 num_links = of_get_child_count(dev->of_node);
34
35 /* Allocate the DAI link array */
36 card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
37 if (!card->dai_link)
38 return -ENOMEM;
39
40 card->num_links = num_links;
41 link = card->dai_link;
42 for_each_child_of_node(dev->of_node, np) {
43 cpu = of_get_child_by_name(np, "cpu");
44 if (!cpu) {
45 dev_err(dev, "Can't find cpu DT node\n");
46 ret = -EINVAL;
47 goto err;
48 }
49
50 link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
51 if (!link->cpu_of_node) {
52 dev_err(card->dev, "error getting cpu phandle\n");
53 ret = -EINVAL;
54 goto err;
55 }
56
57 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
58 if (ret) {
59 dev_err(card->dev, "error getting cpu dai name\n");
60 goto err;
61 }
62
63 platform = of_get_child_by_name(np, "platform");
64 codec = of_get_child_by_name(np, "codec");
65 if (codec && platform) {
66 link->platform_of_node = of_parse_phandle(platform,
67 "sound-dai",
68 0);
69 if (!link->platform_of_node) {
70 dev_err(card->dev, "platform dai not found\n");
71 ret = -EINVAL;
72 goto err;
73 }
74
75 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
76 if (ret < 0) {
77 dev_err(card->dev, "codec dai not found\n");
78 goto err;
79 }
80 link->no_pcm = 1;
81 link->ignore_pmdown_time = 1;
82 } else {
83 link->platform_of_node = link->cpu_of_node;
84 link->codec_dai_name = "snd-soc-dummy-dai";
85 link->codec_name = "snd-soc-dummy";
86 link->dynamic = 1;
87 }
88
89 link->ignore_suspend = 1;
90 ret = of_property_read_string(np, "link-name", &link->name);
91 if (ret) {
92 dev_err(card->dev, "error getting codec dai_link name\n");
93 goto err;
94 }
95
96 link->dpcm_playback = 1;
97 link->dpcm_capture = 1;
98 link->stream_name = link->name;
99 link++;
100 }
101
102 return 0;
103 err:
104 of_node_put(cpu);
105 of_node_put(codec);
106 of_node_put(platform);
107 kfree(card->dai_link);
108 return ret;
109 }
110 EXPORT_SYMBOL(qcom_snd_parse_of);
111
112 MODULE_LICENSE("GPL v2");
113
