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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Analog Devices ADV7511 HDMI transmitter driver4 *5 * Copyright 2012 Analog Devices Inc.6 * Copyright (c) 2016, Linaro Limited7 */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 58static int 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 32:105 if (fmt->bit_fmt != SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)106 return -EINVAL;107 fallthrough;108 case 24:109 len = ADV7511_I2S_SAMPLE_LEN_24;110 break;111 default:112 return -EINVAL;113 }114 115 switch (fmt->fmt) {116 case HDMI_I2S: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;121 break;122 case HDMI_RIGHT_J:123 audio_source = ADV7511_AUDIO_SOURCE_I2S;124 i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;125 break;126 case HDMI_LEFT_J:127 audio_source = ADV7511_AUDIO_SOURCE_I2S;128 i2s_format = ADV7511_I2S_FORMAT_LEFT_J;129 break;130 case HDMI_SPDIF:131 audio_source = ADV7511_AUDIO_SOURCE_SPDIF;132 break;133 default:134 return -EINVAL;135 }136 137 invert_clock = fmt->bit_clk_inv;138 139 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,140 audio_source << 4);141 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),142 invert_clock << 6);143 regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,144 i2s_format);145 146 adv7511->audio_source = audio_source;147 148 adv7511->f_audio = hparms->sample_rate;149 150 adv7511_update_cts_n(adv7511);151 152 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);157 158 return 0;159}160 161static int audio_startup(struct device *dev, void *data)162{163 struct adv7511 *adv7511 = dev_get_drvdata(dev);164 165 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,166 BIT(7), 0);167 168 /* hide Audio infoframe updates */169 regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,170 BIT(5), BIT(5));171 /* enable N/CTS, enable Audio sample packets */172 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,173 BIT(5), BIT(5));174 /* enable N/CTS */175 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,176 BIT(6), BIT(6));177 /* not copyrighted */178 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,179 BIT(5), BIT(5));180 /* enable audio infoframes */181 regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,182 BIT(3), BIT(3));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),188 BIT(5), 0);189 /* enable SPDIF receiver */190 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)191 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,192 BIT(7), BIT(7));193 194 return 0;195}196 197static void audio_shutdown(struct device *dev, void *data)198{199 struct adv7511 *adv7511 = dev_get_drvdata(dev);200 201 if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)202 regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,203 BIT(7), 0);204}205 206static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,207 struct device_node *endpoint)208{209 struct of_endpoint of_ep;210 int ret;211 212 ret = of_graph_parse_endpoint(endpoint, &of_ep);213 if (ret < 0)214 return ret;215 216 /*217 * HDMI sound should be located as reg = <2>218 * Then, it is sound port 0219 */220 if (of_ep.port == 2)221 return 0;222 223 return -EINVAL;224}225 226static 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,231};232 233static const struct hdmi_codec_pdata codec_data = {234 .ops = &adv7511_codec_ops,235 .max_i2s_channels = 2,236 .i2s = 1,237 .spdif = 1,238};239 240int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)241{242 adv7511->audio_pdev = platform_device_register_data(dev,243 HDMI_CODEC_DRV_NAME,244 PLATFORM_DEVID_AUTO,245 &codec_data,246 sizeof(codec_data));247 return PTR_ERR_OR_ZERO(adv7511->audio_pdev);248}249 250void adv7511_audio_exit(struct adv7511 *adv7511)251{252 if (adv7511->audio_pdev) {253 platform_device_unregister(adv7511->audio_pdev);254 adv7511->audio_pdev = NULL;255 }256}257