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>
14 #include <linux/of_graph.h>
18 static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
19 unsigned int *cts, unsigned int *n)
35 *cts = ((f_tmds * *n) / (128 * fs)) * 1000;
38 static int adv7511_update_cts_n(struct adv7511 *adv7511)
43 adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
45 regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
46 regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
47 regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
49 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
51 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
53 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
59 int adv7511_hdmi_hw_params(struct device *dev, void *data,
60 struct hdmi_codec_daifmt *fmt,
61 struct hdmi_codec_params *hparms)
63 struct adv7511 *adv7511 = dev_get_drvdata(dev);
64 unsigned int audio_source, i2s_format = 0;
65 unsigned int invert_clock;
69 switch (hparms->sample_rate) {
71 rate = ADV7511_SAMPLE_FREQ_32000;
74 rate = ADV7511_SAMPLE_FREQ_44100;
77 rate = ADV7511_SAMPLE_FREQ_48000;
80 rate = ADV7511_SAMPLE_FREQ_88200;
83 rate = ADV7511_SAMPLE_FREQ_96000;
86 rate = ADV7511_SAMPLE_FREQ_176400;
89 rate = ADV7511_SAMPLE_FREQ_192000;
95 switch (hparms->sample_width) {
97 len = ADV7511_I2S_SAMPLE_LEN_16;
100 len = ADV7511_I2S_SAMPLE_LEN_18;
103 len = ADV7511_I2S_SAMPLE_LEN_20;
106 len = ADV7511_I2S_SAMPLE_LEN_24;
114 audio_source = ADV7511_AUDIO_SOURCE_I2S;
115 i2s_format = ADV7511_I2S_FORMAT_I2S;
118 audio_source = ADV7511_AUDIO_SOURCE_I2S;
119 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
122 audio_source = ADV7511_AUDIO_SOURCE_I2S;
123 i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
129 invert_clock = fmt->bit_clk_inv;
131 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
133 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
135 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
138 adv7511->audio_source = audio_source;
140 adv7511->f_audio = hparms->sample_rate;
142 adv7511_update_cts_n(adv7511);
144 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
145 ADV7511_AUDIO_CFG3_LEN_MASK, len);
146 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
147 ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
148 regmap_write(adv7511->regmap, 0x73, 0x1);
153 static int audio_startup(struct device *dev, void *data)
155 struct adv7511 *adv7511 = dev_get_drvdata(dev);
157 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
160 /* hide Audio infoframe updates */
161 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
163 /* enable N/CTS, enable Audio sample packets */
164 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
167 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
169 /* not copyrighted */
170 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
172 /* enable audio infoframes */
173 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
175 /* AV mute disable */
176 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
177 BIT(7) | BIT(6), BIT(7));
178 /* use Audio infoframe updated info */
179 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
184 static void audio_shutdown(struct device *dev, void *data)
188 static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
189 struct device_node *endpoint)
191 struct of_endpoint of_ep;
194 ret = of_graph_parse_endpoint(endpoint, &of_ep);
199 * HDMI sound should be located as reg = <2>
200 * Then, it is sound port 0
208 static const struct hdmi_codec_ops adv7511_codec_ops = {
209 .hw_params = adv7511_hdmi_hw_params,
210 .audio_shutdown = audio_shutdown,
211 .audio_startup = audio_startup,
212 .get_dai_id = adv7511_hdmi_i2s_get_dai_id,
215 static const struct hdmi_codec_pdata codec_data = {
216 .ops = &adv7511_codec_ops,
217 .max_i2s_channels = 2,
221 int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
223 adv7511->audio_pdev = platform_device_register_data(dev,
228 return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
231 void adv7511_audio_exit(struct adv7511 *adv7511)
233 if (adv7511->audio_pdev) {
234 platform_device_unregister(adv7511->audio_pdev);
235 adv7511->audio_pdev = NULL;