1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Analog Devices ADV7511 HDMI transmitter driver 4 * 5 * Copyright 2012 Analog Devices Inc. 6 * Copyright (c) 2016, Linaro Limited 7 */ 8 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> 14 15#include "adv7511.h" 16 17static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs, 18 unsigned int *cts, unsigned int *n) 19{ 20 switch (fs) { 21 case 32000: 22 case 48000: 23 case 96000: 24 case 192000: 25 *n = fs * 128 / 1000; 26 break; 27 case 44100: 28 case 88200: 29 case 176400: 30 *n = fs * 128 / 900; 31 break; 32 } 33 34 *cts = ((f_tmds * *n) / (128 * fs)) * 1000; 35} 36 37static int adv7511_update_cts_n(struct adv7511 *adv7511) 38{ 39 unsigned int cts = 0; 40 unsigned int n = 0; 41 42 adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n); 43 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); 47 48 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0, 49 (cts >> 16) & 0xf); 50 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1, 51 (cts >> 8) & 0xff); 52 regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2, 53 cts & 0xff); 54 55 return 0; 56} 57 58int adv7511_hdmi_hw_params(struct device *dev, void *data, 59 struct hdmi_codec_daifmt *fmt, 60 struct hdmi_codec_params *hparms) 61{ 62 struct adv7511 *adv7511 = dev_get_drvdata(dev); 63 unsigned int audio_source, i2s_format = 0; 64 unsigned int invert_clock; 65 unsigned int rate; 66 unsigned int len; 67 68 switch (hparms->sample_rate) { 69 case 32000: 70 rate = ADV7511_SAMPLE_FREQ_32000; 71 break; 72 case 44100: 73 rate = ADV7511_SAMPLE_FREQ_44100; 74 break; 75 case 48000: 76 rate = ADV7511_SAMPLE_FREQ_48000; 77 break; 78 case 88200: 79 rate = ADV7511_SAMPLE_FREQ_88200; 80 break; 81 case 96000: 82 rate = ADV7511_SAMPLE_FREQ_96000; 83 break; 84 case 176400: 85 rate = ADV7511_SAMPLE_FREQ_176400; 86 break; 87 case 192000: 88 rate = ADV7511_SAMPLE_FREQ_192000; 89 break; 90 default: 91 return -EINVAL; 92 } 93 94 switch (hparms->sample_width) { 95 case 16: 96 len = ADV7511_I2S_SAMPLE_LEN_16; 97 break; 98 case 18: 99 len = ADV7511_I2S_SAMPLE_LEN_18; 100 break; 101 case 20: 102 len = ADV7511_I2S_SAMPLE_LEN_20; 103 break; 104 case 24: 105 len = ADV7511_I2S_SAMPLE_LEN_24; 106 break; 107 default: 108 return -EINVAL; 109 } 110 111 switch (fmt->fmt) { 112 case HDMI_I2S: 113 audio_source = ADV7511_AUDIO_SOURCE_I2S; 114 i2s_format = ADV7511_I2S_FORMAT_I2S; 115 break; 116 case HDMI_RIGHT_J: 117 audio_source = ADV7511_AUDIO_SOURCE_I2S; 118 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J; 119 break; 120 case HDMI_LEFT_J: 121 audio_source = ADV7511_AUDIO_SOURCE_I2S; 122 i2s_format = ADV7511_I2S_FORMAT_LEFT_J; 123 break; 124 case HDMI_SPDIF: 125 audio_source = ADV7511_AUDIO_SOURCE_SPDIF; 126 break; 127 default: 128 return -EINVAL; 129 } 130 131 invert_clock = fmt->bit_clk_inv; 132 133 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70, 134 audio_source << 4); 135 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6), 136 invert_clock << 6); 137 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03, 138 i2s_format); 139 140 adv7511->audio_source = audio_source; 141 142 adv7511->f_audio = hparms->sample_rate; 143 144 adv7511_update_cts_n(adv7511); 145 146 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3, 147 ADV7511_AUDIO_CFG3_LEN_MASK, len); 148 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 149 ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4); 150 regmap_write(adv7511->regmap, 0x73, 0x1); 151 152 return 0; 153} 154 155static int audio_startup(struct device *dev, void *data) 156{ 157 struct adv7511 *adv7511 = dev_get_drvdata(dev); 158 159 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, 160 BIT(7), 0); 161 162 /* hide Audio infoframe updates */ 163 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE, 164 BIT(5), BIT(5)); 165 /* enable N/CTS, enable Audio sample packets */ 166 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1, 167 BIT(5), BIT(5)); 168 /* enable N/CTS */ 169 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1, 170 BIT(6), BIT(6)); 171 /* not copyrighted */ 172 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1, 173 BIT(5), BIT(5)); 174 /* enable audio infoframes */ 175 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1, 176 BIT(3), BIT(3)); 177 /* AV mute disable */ 178 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0), 179 BIT(7) | BIT(6), BIT(7)); 180 /* use Audio infoframe updated info */ 181 regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1), 182 BIT(5), 0); 183 /* enable SPDIF receiver */ 184 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF) 185 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, 186 BIT(7), BIT(7)); 187 188 return 0; 189} 190 191static void audio_shutdown(struct device *dev, void *data) 192{ 193 struct adv7511 *adv7511 = dev_get_drvdata(dev); 194 195 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF) 196 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, 197 BIT(7), 0); 198} 199 200static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component, 201 struct device_node *endpoint) 202{ 203 struct of_endpoint of_ep; 204 int ret; 205 206 ret = of_graph_parse_endpoint(endpoint, &of_ep); 207 if (ret < 0) 208 return ret; 209 210 /* 211 * HDMI sound should be located as reg = <2> 212 * Then, it is sound port 0 213 */ 214 if (of_ep.port == 2) 215 return 0; 216 217 return -EINVAL; 218} 219 220static const struct hdmi_codec_ops adv7511_codec_ops = { 221 .hw_params = adv7511_hdmi_hw_params, 222 .audio_shutdown = audio_shutdown, 223 .audio_startup = audio_startup, 224 .get_dai_id = adv7511_hdmi_i2s_get_dai_id, 225}; 226 227static const struct hdmi_codec_pdata codec_data = { 228 .ops = &adv7511_codec_ops, 229 .max_i2s_channels = 2, 230 .i2s = 1, 231 .spdif = 1, 232}; 233 234int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511) 235{ 236 adv7511->audio_pdev = platform_device_register_data(dev, 237 HDMI_CODEC_DRV_NAME, 238 PLATFORM_DEVID_AUTO, 239 &codec_data, 240 sizeof(codec_data)); 241 return PTR_ERR_OR_ZERO(adv7511->audio_pdev); 242} 243 244void adv7511_audio_exit(struct adv7511 *adv7511) 245{ 246 if (adv7511->audio_pdev) { 247 platform_device_unregister(adv7511->audio_pdev); 248 adv7511->audio_pdev = NULL; 249 } 250} 251