2 * Analog Devices ADV7511 HDMI transmitter driver
4 * Copyright 2012 Analog Devices Inc.
5 * Copyright (c) 2016, Linaro Limited
7 * Licensed under the GPL-2.
10 #include <sound/core.h>
11 #include <sound/hdmi-codec.h>
12 #include <sound/pcm.h>
13 #include <sound/soc.h>
17 static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
18 unsigned int *cts, unsigned int *n)
32 *cts = ((f_tmds * *n) / (128 * fs)) * 1000;
35 static int adv7511_update_cts_n(struct adv7511 *adv7511)
40 adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
42 regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
43 regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
44 regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
46 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
48 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
50 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
56 int adv7511_hdmi_hw_params(struct device *dev, void *data,
57 struct hdmi_codec_daifmt *fmt,
58 struct hdmi_codec_params *hparms)
60 struct adv7511 *adv7511 = dev_get_drvdata(dev);
61 unsigned int audio_source, i2s_format = 0;
62 unsigned int invert_clock;
66 switch (hparms->sample_rate) {
68 rate = ADV7511_SAMPLE_FREQ_32000;
71 rate = ADV7511_SAMPLE_FREQ_44100;
74 rate = ADV7511_SAMPLE_FREQ_48000;
77 rate = ADV7511_SAMPLE_FREQ_88200;
80 rate = ADV7511_SAMPLE_FREQ_96000;
83 rate = ADV7511_SAMPLE_FREQ_176400;
86 rate = ADV7511_SAMPLE_FREQ_192000;
92 switch (hparms->sample_width) {
94 len = ADV7511_I2S_SAMPLE_LEN_16;
97 len = ADV7511_I2S_SAMPLE_LEN_18;
100 len = ADV7511_I2S_SAMPLE_LEN_20;
103 len = ADV7511_I2S_SAMPLE_LEN_24;
111 audio_source = ADV7511_AUDIO_SOURCE_I2S;
112 i2s_format = ADV7511_I2S_FORMAT_I2S;
115 audio_source = ADV7511_AUDIO_SOURCE_I2S;
116 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
119 audio_source = ADV7511_AUDIO_SOURCE_I2S;
120 i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
126 invert_clock = fmt->bit_clk_inv;
128 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
130 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
132 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
135 adv7511->audio_source = audio_source;
137 adv7511->f_audio = hparms->sample_rate;
139 adv7511_update_cts_n(adv7511);
141 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
142 ADV7511_AUDIO_CFG3_LEN_MASK, len);
143 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
144 ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
145 regmap_write(adv7511->regmap, 0x73, 0x1);
150 static int audio_startup(struct device *dev, void *data)
152 struct adv7511 *adv7511 = dev_get_drvdata(dev);
154 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
157 /* hide Audio infoframe updates */
158 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
160 /* enable N/CTS, enable Audio sample packets */
161 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
164 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
166 /* not copyrighted */
167 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
169 /* enable audio infoframes */
170 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
172 /* AV mute disable */
173 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
174 BIT(7) | BIT(6), BIT(7));
175 /* use Audio infoframe updated info */
176 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
181 static void audio_shutdown(struct device *dev, void *data)
185 static const struct hdmi_codec_ops adv7511_codec_ops = {
186 .hw_params = adv7511_hdmi_hw_params,
187 .audio_shutdown = audio_shutdown,
188 .audio_startup = audio_startup,
191 static struct hdmi_codec_pdata codec_data = {
192 .ops = &adv7511_codec_ops,
193 .max_i2s_channels = 2,
197 int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
199 adv7511->audio_pdev = platform_device_register_data(dev,
204 return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
207 void adv7511_audio_exit(struct adv7511 *adv7511)
209 if (adv7511->audio_pdev) {
210 platform_device_unregister(adv7511->audio_pdev);
211 adv7511->audio_pdev = NULL;