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
184
185
186
187
188
189
190
|
// SPDX-License-Identifier: MIT
/*
* Copyright (c) 2024 Linaro Ltd
*/
#include <linux/mutex.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <drm/drm_connector.h>
#include <drm/drm_device.h>
#include <drm/display/drm_hdmi_audio_helper.h>
#include <sound/hdmi-codec.h>
static int drm_connector_hdmi_audio_startup(struct device *dev, void *data)
{
struct drm_connector *connector = data;
const struct drm_connector_hdmi_audio_funcs *funcs =
connector->hdmi_audio.funcs;
if (funcs->startup)
return funcs->startup(connector);
return 0;
}
static int drm_connector_hdmi_audio_prepare(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms)
{
struct drm_connector *connector = data;
const struct drm_connector_hdmi_audio_funcs *funcs =
connector->hdmi_audio.funcs;
return funcs->prepare(connector, fmt, hparms);
}
static void drm_connector_hdmi_audio_shutdown(struct device *dev, void *data)
{
struct drm_connector *connector = data;
const struct drm_connector_hdmi_audio_funcs *funcs =
connector->hdmi_audio.funcs;
return funcs->shutdown(connector);
}
static int drm_connector_hdmi_audio_mute_stream(struct device *dev, void *data,
bool enable, int direction)
{
struct drm_connector *connector = data;
const struct drm_connector_hdmi_audio_funcs *funcs =
connector->hdmi_audio.funcs;
if (funcs->mute_stream)
return funcs->mute_stream(connector, enable, direction);
return -ENOTSUPP;
}
static int drm_connector_hdmi_audio_get_dai_id(struct snd_soc_component *comment,
struct device_node *endpoint,
void *data)
{
struct drm_connector *connector = data;
struct of_endpoint of_ep;
int ret;
if (connector->hdmi_audio.dai_port < 0)
return -ENOTSUPP;
ret = of_graph_parse_endpoint(endpoint, &of_ep);
if (ret < 0)
return ret;
if (of_ep.port == connector->hdmi_audio.dai_port)
return 0;
return -EINVAL;
}
static int drm_connector_hdmi_audio_get_eld(struct device *dev, void *data,
uint8_t *buf, size_t len)
{
struct drm_connector *connector = data;
mutex_lock(&connector->eld_mutex);
memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
mutex_unlock(&connector->eld_mutex);
return 0;
}
static int drm_connector_hdmi_audio_hook_plugged_cb(struct device *dev,
void *data,
hdmi_codec_plugged_cb fn,
struct device *codec_dev)
{
struct drm_connector *connector = data;
mutex_lock(&connector->hdmi_audio.lock);
connector->hdmi_audio.plugged_cb = fn;
connector->hdmi_audio.plugged_cb_dev = codec_dev;
fn(codec_dev, connector->hdmi_audio.last_state);
mutex_unlock(&connector->hdmi_audio.lock);
return 0;
}
void drm_connector_hdmi_audio_plugged_notify(struct drm_connector *connector,
bool plugged)
{
mutex_lock(&connector->hdmi_audio.lock);
connector->hdmi_audio.last_state = plugged;
if (connector->hdmi_audio.plugged_cb &&
connector->hdmi_audio.plugged_cb_dev)
connector->hdmi_audio.plugged_cb(connector->hdmi_audio.plugged_cb_dev,
connector->hdmi_audio.last_state);
mutex_unlock(&connector->hdmi_audio.lock);
}
EXPORT_SYMBOL(drm_connector_hdmi_audio_plugged_notify);
static const struct hdmi_codec_ops drm_connector_hdmi_audio_ops = {
.audio_startup = drm_connector_hdmi_audio_startup,
.prepare = drm_connector_hdmi_audio_prepare,
.audio_shutdown = drm_connector_hdmi_audio_shutdown,
.mute_stream = drm_connector_hdmi_audio_mute_stream,
.get_eld = drm_connector_hdmi_audio_get_eld,
.get_dai_id = drm_connector_hdmi_audio_get_dai_id,
.hook_plugged_cb = drm_connector_hdmi_audio_hook_plugged_cb,
};
/**
* drm_connector_hdmi_audio_init - Initialize HDMI Codec device for the DRM connector
* @connector: A pointer to the connector to allocate codec for
* @hdmi_codec_dev: device to be used as a parent for the HDMI Codec
* @funcs: callbacks for this HDMI Codec
* @max_i2s_playback_channels: maximum number of playback I2S channels
* @spdif_playback: set if HDMI codec has S/PDIF playback port
* @dai_port: sound DAI port, -1 if it is not enabled
*
* Create a HDMI codec device to be used with the specified connector.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_connector_hdmi_audio_init(struct drm_connector *connector,
struct device *hdmi_codec_dev,
const struct drm_connector_hdmi_audio_funcs *funcs,
unsigned int max_i2s_playback_channels,
bool spdif_playback,
int dai_port)
{
struct hdmi_codec_pdata codec_pdata = {
.ops = &drm_connector_hdmi_audio_ops,
.max_i2s_channels = max_i2s_playback_channels,
.i2s = !!max_i2s_playback_channels,
.spdif = spdif_playback,
.no_i2s_capture = true,
.no_spdif_capture = true,
.data = connector,
};
struct platform_device *pdev;
if (!funcs ||
!funcs->prepare ||
!funcs->shutdown)
return -EINVAL;
connector->hdmi_audio.funcs = funcs;
connector->hdmi_audio.dai_port = dai_port;
pdev = platform_device_register_data(hdmi_codec_dev,
HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_pdata, sizeof(codec_pdata));
if (IS_ERR(pdev))
return PTR_ERR(pdev);
connector->hdmi_audio.codec_pdev = pdev;
return 0;
}
EXPORT_SYMBOL(drm_connector_hdmi_audio_init);
|
