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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* Analog Devices ADV7511 HDMI transmitter driver
*
* Copyright 2012 Analog Devices Inc.
* Copyright (c) 2016, Linaro Limited
*
* Licensed under the GPL-2.
*/
#include <sound/core.h>
#include <sound/hdmi-codec.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <linux/of_graph.h>
#include "adv7511.h"
static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
unsigned int *cts, unsigned int *n)
{
switch (fs) {
case 32000:
*n = 4096;
break;
case 44100:
*n = 6272;
break;
case 48000:
*n = 6144;
break;
}
*cts = ((f_tmds * *n) / (128 * fs)) * 1000;
}
static int adv7511_update_cts_n(struct adv7511 *adv7511)
{
unsigned int cts = 0;
unsigned int n = 0;
adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
(cts >> 16) & 0xf);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
(cts >> 8) & 0xff);
regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
cts & 0xff);
return 0;
}
int adv7511_hdmi_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms)
{
struct adv7511 *adv7511 = dev_get_drvdata(dev);
unsigned int audio_source, i2s_format = 0;
unsigned int invert_clock;
unsigned int rate;
unsigned int len;
switch (hparms->sample_rate) {
case 32000:
rate = ADV7511_SAMPLE_FREQ_32000;
break;
case 44100:
rate = ADV7511_SAMPLE_FREQ_44100;
break;
case 48000:
rate = ADV7511_SAMPLE_FREQ_48000;
break;
case 88200:
rate = ADV7511_SAMPLE_FREQ_88200;
break;
case 96000:
rate = ADV7511_SAMPLE_FREQ_96000;
break;
case 176400:
rate = ADV7511_SAMPLE_FREQ_176400;
break;
case 192000:
rate = ADV7511_SAMPLE_FREQ_192000;
break;
default:
return -EINVAL;
}
switch (hparms->sample_width) {
case 16:
len = ADV7511_I2S_SAMPLE_LEN_16;
break;
case 18:
len = ADV7511_I2S_SAMPLE_LEN_18;
break;
case 20:
len = ADV7511_I2S_SAMPLE_LEN_20;
break;
case 24:
len = ADV7511_I2S_SAMPLE_LEN_24;
break;
default:
return -EINVAL;
}
switch (fmt->fmt) {
case HDMI_I2S:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_I2S;
break;
case HDMI_RIGHT_J:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
break;
case HDMI_LEFT_J:
audio_source = ADV7511_AUDIO_SOURCE_I2S;
i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
break;
default:
return -EINVAL;
}
invert_clock = fmt->bit_clk_inv;
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
audio_source << 4);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
invert_clock << 6);
regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
i2s_format);
adv7511->audio_source = audio_source;
adv7511->f_audio = hparms->sample_rate;
adv7511_update_cts_n(adv7511);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
ADV7511_AUDIO_CFG3_LEN_MASK, len);
regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
regmap_write(adv7511->regmap, 0x73, 0x1);
return 0;
}
static int audio_startup(struct device *dev, void *data)
{
struct adv7511 *adv7511 = dev_get_drvdata(dev);
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
BIT(7), 0);
/* hide Audio infoframe updates */
regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
BIT(5), BIT(5));
/* enable N/CTS, enable Audio sample packets */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(5), BIT(5));
/* enable N/CTS */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(6), BIT(6));
/* not copyrighted */
regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
BIT(5), BIT(5));
/* enable audio infoframes */
regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
BIT(3), BIT(3));
/* AV mute disable */
regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
BIT(7) | BIT(6), BIT(7));
/* use Audio infoframe updated info */
regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
BIT(5), 0);
return 0;
}
static void audio_shutdown(struct device *dev, void *data)
{
}
static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
struct device_node *endpoint)
{
struct of_endpoint of_ep;
int ret;
ret = of_graph_parse_endpoint(endpoint, &of_ep);
if (ret < 0)
return ret;
/*
* HDMI sound should be located as reg = <2>
* Then, it is sound port 0
*/
if (of_ep.port == 2)
return 0;
return -EINVAL;
}
static const struct hdmi_codec_ops adv7511_codec_ops = {
.hw_params = adv7511_hdmi_hw_params,
.audio_shutdown = audio_shutdown,
.audio_startup = audio_startup,
.get_dai_id = adv7511_hdmi_i2s_get_dai_id,
};
static struct hdmi_codec_pdata codec_data = {
.ops = &adv7511_codec_ops,
.max_i2s_channels = 2,
.i2s = 1,
};
int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
{
adv7511->audio_pdev = platform_device_register_data(dev,
HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_data,
sizeof(codec_data));
return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
}
void adv7511_audio_exit(struct adv7511 *adv7511)
{
if (adv7511->audio_pdev) {
platform_device_unregister(adv7511->audio_pdev);
adv7511->audio_pdev = NULL;
}
}
|
