xref: /openbmc/linux/sound/soc/intel/avs/boards/dmic.c (revision c2076f4f)
1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
4 //
5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
6 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
7 //
8 
9 #include <linux/device.h>
10 #include <linux/module.h>
11 #include <sound/soc.h>
12 #include <sound/soc-acpi.h>
13 
14 SND_SOC_DAILINK_DEF(dmic_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC Pin")));
15 SND_SOC_DAILINK_DEF(dmic_wov_pin, DAILINK_COMP_ARRAY(COMP_CPU("DMIC WoV Pin")));
16 SND_SOC_DAILINK_DEF(dmic_codec, DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec", "dmic-hifi")));
17 /* Name overridden on probe */
18 SND_SOC_DAILINK_DEF(platform, DAILINK_COMP_ARRAY(COMP_PLATFORM("")));
19 
20 static struct snd_soc_dai_link card_dai_links[] = {
21 	/* Back ends */
22 	{
23 		.name = "DMIC",
24 		.id = 0,
25 		.dpcm_capture = 1,
26 		.nonatomic = 1,
27 		.no_pcm = 1,
28 		SND_SOC_DAILINK_REG(dmic_pin, dmic_codec, platform),
29 	},
30 	{
31 		.name = "DMIC WoV",
32 		.id = 1,
33 		.dpcm_capture = 1,
34 		.nonatomic = 1,
35 		.no_pcm = 1,
36 		.ignore_suspend = 1,
37 		SND_SOC_DAILINK_REG(dmic_wov_pin, dmic_codec, platform),
38 	},
39 };
40 
41 static const struct snd_soc_dapm_widget card_widgets[] = {
42 	SND_SOC_DAPM_MIC("SoC DMIC", NULL),
43 };
44 
45 static const struct snd_soc_dapm_route card_routes[] = {
46 	{"DMic", NULL, "SoC DMIC"},
47 };
48 
avs_dmic_probe(struct platform_device * pdev)49 static int avs_dmic_probe(struct platform_device *pdev)
50 {
51 	struct snd_soc_acpi_mach *mach;
52 	struct snd_soc_card *card;
53 	struct device *dev = &pdev->dev;
54 	int ret;
55 
56 	mach = dev_get_platdata(dev);
57 
58 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
59 	if (!card)
60 		return -ENOMEM;
61 
62 	card->name = "avs_dmic";
63 	card->dev = dev;
64 	card->owner = THIS_MODULE;
65 	card->dai_link = card_dai_links;
66 	card->num_links = ARRAY_SIZE(card_dai_links);
67 	card->dapm_widgets = card_widgets;
68 	card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
69 	card->dapm_routes = card_routes;
70 	card->num_dapm_routes = ARRAY_SIZE(card_routes);
71 	card->fully_routed = true;
72 
73 	ret = snd_soc_fixup_dai_links_platform_name(card, mach->mach_params.platform);
74 	if (ret)
75 		return ret;
76 
77 	return devm_snd_soc_register_card(dev, card);
78 }
79 
80 static struct platform_driver avs_dmic_driver = {
81 	.probe = avs_dmic_probe,
82 	.driver = {
83 		.name = "avs_dmic",
84 		.pm = &snd_soc_pm_ops,
85 	},
86 };
87 
88 module_platform_driver(avs_dmic_driver);
89 
90 MODULE_LICENSE("GPL");
91 MODULE_ALIAS("platform:avs_dmic");
92