summaryrefslogtreecommitdiffstats
path: root/sound/soc/generic/audio-graph-card2-custom-sample.c
blob: 4a2c743e286c4c7f2ad92b91b023223ed4a88ed7 (plain)
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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
// SPDX-License-Identifier: GPL-2.0
//
// audio-graph-card2-custom-sample.c
//
// Copyright (C) 2020 Renesas Electronics Corp.
// Copyright (C) 2020 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
//
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <sound/graph_card.h>

/*
 * Custom driver can have own priv
 * which includes asoc_simple_priv.
 */
struct custom_priv {
	struct asoc_simple_priv simple_priv;

	/* custom driver's own params */
	int custom_params;
};

/* You can get custom_priv from simple_priv */
#define simple_to_custom(simple) container_of((simple), struct custom_priv, simple_priv)

static int custom_card_probe(struct snd_soc_card *card)
{
	struct asoc_simple_priv *simple_priv = snd_soc_card_get_drvdata(card);
	struct custom_priv *custom_priv = simple_to_custom(simple_priv);
	struct device *dev = simple_priv_to_dev(simple_priv);

	dev_info(dev, "custom probe\n");

	custom_priv->custom_params = 1;

	/* you can use generic probe function */
	return asoc_graph_card_probe(card);
}

static int custom_hook_pre(struct asoc_simple_priv *priv)
{
	struct device *dev = simple_priv_to_dev(priv);

	/* You can custom before parsing */
	dev_info(dev, "hook : %s\n", __func__);

	return 0;
}

static int custom_hook_post(struct asoc_simple_priv *priv)
{
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_card *card;

	/* You can custom after parsing */
	dev_info(dev, "hook : %s\n", __func__);

	/* overwrite .probe sample */
	card = simple_priv_to_card(priv);
	card->probe = custom_card_probe;

	return 0;
}

static int custom_normal(struct asoc_simple_priv *priv,
			 struct device_node *lnk,
			 struct link_info *li)
{
	struct device *dev = simple_priv_to_dev(priv);

	/*
	 * You can custom Normal parsing
	 * before/affter audio_graph2_link_normal()
	 */
	dev_info(dev, "hook : %s\n", __func__);

	return audio_graph2_link_normal(priv, lnk, li);
}

static int custom_dpcm(struct asoc_simple_priv *priv,
		       struct device_node *lnk,
		       struct link_info *li)
{
	struct device *dev = simple_priv_to_dev(priv);

	/*
	 * You can custom DPCM parsing
	 * before/affter audio_graph2_link_dpcm()
	 */
	dev_info(dev, "hook : %s\n", __func__);

	return audio_graph2_link_dpcm(priv, lnk, li);
}

static int custom_c2c(struct asoc_simple_priv *priv,
		      struct device_node *lnk,
		      struct link_info *li)
{
	struct device *dev = simple_priv_to_dev(priv);

	/*
	 * You can custom Codec2Codec parsing
	 * before/affter audio_graph2_link_c2c()
	 */
	dev_info(dev, "hook : %s\n", __func__);

	return audio_graph2_link_c2c(priv, lnk, li);
}

/*
 * audio-graph-card2 has many hooks for your customizing.
 */
static struct graph2_custom_hooks custom_hooks = {
	.hook_pre	= custom_hook_pre,
	.hook_post	= custom_hook_post,
	.custom_normal	= custom_normal,
	.custom_dpcm	= custom_dpcm,
	.custom_c2c	= custom_c2c,
};

static int custom_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct device *dev = simple_priv_to_dev(priv);

	dev_info(dev, "custom startup\n");

	return asoc_simple_startup(substream);
}

/* You can use custom ops */
static const struct snd_soc_ops custom_ops = {
	.startup	= custom_startup,
	.shutdown	= asoc_simple_shutdown,
	.hw_params	= asoc_simple_hw_params,
};

static int custom_probe(struct platform_device *pdev)
{
	struct custom_priv *custom_priv;
	struct asoc_simple_priv *simple_priv;
	struct device *dev = &pdev->dev;
	int ret;

	custom_priv = devm_kzalloc(dev, sizeof(*custom_priv), GFP_KERNEL);
	if (!custom_priv)
		return -ENOMEM;

	simple_priv		= &custom_priv->simple_priv;
	simple_priv->ops	= &custom_ops; /* customize dai_link ops */

	/* use audio-graph-card2 parsing with own custom hooks */
	ret = audio_graph2_parse_of(simple_priv, dev, &custom_hooks);
	if (ret < 0)
		return ret;

	/* customize more if needed */

	return 0;
}

static const struct of_device_id custom_of_match[] = {
	{ .compatible = "audio-graph-card2-custom-sample", },
	{},
};
MODULE_DEVICE_TABLE(of, custom_of_match);

static struct platform_driver custom_card = {
	.driver = {
		.name = "audio-graph-card2-custom-sample",
		.of_match_table = custom_of_match,
	},
	.probe	= custom_probe,
	.remove	= asoc_simple_remove,
};
module_platform_driver(custom_card);

MODULE_ALIAS("platform:asoc-audio-graph-card2-custom-sample");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Audio Graph Card2 Custom Sample");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");