1 // SPDX-License-Identifier: GPL-2.0-only
3 * Analog Devices ADV7511 HDMI transmitter driver
5 * Copyright 2012 Analog Devices Inc.
6 * Copyright (c) 2016, Linaro Limited
9 #include <sound/core.h>
10 #include <sound/hdmi-codec.h>
11 #include <sound/pcm.h>
12 #include <sound/soc.h>
13 #include <linux/of_graph.h>
17 static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
18 unsigned int *cts, unsigned int *n)
34 *cts = ((f_tmds * *n) / (128 * fs)) * 1000;
37 static int adv7511_update_cts_n(struct adv7511 *adv7511)
42 adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
44 regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
45 regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
46 regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
48 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
50 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
52 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
58 static int adv7511_hdmi_hw_params(struct device *dev, void *data,
59 struct hdmi_codec_daifmt *fmt,
60 struct hdmi_codec_params *hparms)
62 struct adv7511 *adv7511 = dev_get_drvdata(dev);
63 unsigned int audio_source, i2s_format = 0;
64 unsigned int invert_clock;
68 switch (hparms->sample_rate) {
70 rate = ADV7511_SAMPLE_FREQ_32000;
73 rate = ADV7511_SAMPLE_FREQ_44100;
76 rate = ADV7511_SAMPLE_FREQ_48000;
79 rate = ADV7511_SAMPLE_FREQ_88200;
82 rate = ADV7511_SAMPLE_FREQ_96000;
85 rate = ADV7511_SAMPLE_FREQ_176400;
88 rate = ADV7511_SAMPLE_FREQ_192000;
94 switch (hparms->sample_width) {
96 len = ADV7511_I2S_SAMPLE_LEN_16;
99 len = ADV7511_I2S_SAMPLE_LEN_18;
102 len = ADV7511_I2S_SAMPLE_LEN_20;
105 if (fmt->bit_fmt != SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
109 len = ADV7511_I2S_SAMPLE_LEN_24;
117 audio_source = ADV7511_AUDIO_SOURCE_I2S;
118 i2s_format = ADV7511_I2S_FORMAT_I2S;
119 if (fmt->bit_fmt == SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
120 i2s_format = ADV7511_I2S_IEC958_DIRECT;
123 audio_source = ADV7511_AUDIO_SOURCE_I2S;
124 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
127 audio_source = ADV7511_AUDIO_SOURCE_I2S;
128 i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
131 audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
137 invert_clock = fmt->bit_clk_inv;
139 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
141 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
143 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
146 adv7511->audio_source = audio_source;
148 adv7511->f_audio = hparms->sample_rate;
150 adv7511_update_cts_n(adv7511);
152 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
153 ADV7511_AUDIO_CFG3_LEN_MASK, len);
154 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
155 ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
156 regmap_write(adv7511->regmap, 0x73, 0x1);
161 static int audio_startup(struct device *dev, void *data)
163 struct adv7511 *adv7511 = dev_get_drvdata(dev);
165 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
168 /* hide Audio infoframe updates */
169 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
171 /* enable N/CTS, enable Audio sample packets */
172 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
175 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
177 /* not copyrighted */
178 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
180 /* enable audio infoframes */
181 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
183 /* AV mute disable */
184 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
185 BIT(7) | BIT(6), BIT(7));
186 /* use Audio infoframe updated info */
187 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
189 /* enable SPDIF receiver */
190 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)
191 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
197 static void audio_shutdown(struct device *dev, void *data)
199 struct adv7511 *adv7511 = dev_get_drvdata(dev);
201 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)
202 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
206 static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
207 struct device_node *endpoint)
209 struct of_endpoint of_ep;
212 ret = of_graph_parse_endpoint(endpoint, &of_ep);
217 * HDMI sound should be located as reg = <2>
218 * Then, it is sound port 0
226 static const struct hdmi_codec_ops adv7511_codec_ops = {
227 .hw_params = adv7511_hdmi_hw_params,
228 .audio_shutdown = audio_shutdown,
229 .audio_startup = audio_startup,
230 .get_dai_id = adv7511_hdmi_i2s_get_dai_id,
233 static const struct hdmi_codec_pdata codec_data = {
234 .ops = &adv7511_codec_ops,
235 .max_i2s_channels = 2,
240 int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
242 adv7511->audio_pdev = platform_device_register_data(dev,
247 return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
250 void adv7511_audio_exit(struct adv7511 *adv7511)
252 if (adv7511->audio_pdev) {
253 platform_device_unregister(adv7511->audio_pdev);
254 adv7511->audio_pdev = NULL;