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1// SPDX-License-Identifier: GPL-2.02// Copyright 2017-2020 NXP3 4#include <linux/module.h>5#include <linux/of_platform.h>6#include <sound/jack.h>7#include <sound/pcm_params.h>8#include <sound/hdmi-codec.h>9#include "fsl_sai.h"10 11/**12 * struct cpu_priv - CPU private data13 * @sysclk_id: SYSCLK ids for set_sysclk()14 * @slot_width: Slot width of each frame15 *16 * Note: [1] for tx and [0] for rx17 */18struct cpu_priv {19 u32 sysclk_id[2];20 u32 slot_width;21};22 23struct imx_hdmi_data {24 struct snd_soc_dai_link dai;25 struct snd_soc_card card;26 struct snd_soc_jack hdmi_jack;27 struct snd_soc_jack_pin hdmi_jack_pin;28 struct cpu_priv cpu_priv;29 u32 dai_fmt;30};31 32static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,33 struct snd_pcm_hw_params *params)34{35 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);36 struct imx_hdmi_data *data = snd_soc_card_get_drvdata(rtd->card);37 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;38 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);39 struct snd_soc_card *card = rtd->card;40 struct device *dev = card->dev;41 u32 slot_width = data->cpu_priv.slot_width;42 int ret;43 44 /* MCLK always is (256 or 192) * rate. */45 ret = snd_soc_dai_set_sysclk(cpu_dai, data->cpu_priv.sysclk_id[tx],46 8 * slot_width * params_rate(params),47 tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);48 if (ret && ret != -ENOTSUPP) {49 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);50 return ret;51 }52 53 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, slot_width);54 if (ret && ret != -ENOTSUPP) {55 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);56 return ret;57 }58 59 return 0;60}61 62static const struct snd_soc_ops imx_hdmi_ops = {63 .hw_params = imx_hdmi_hw_params,64};65 66static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {67 SND_SOC_DAPM_LINE("HDMI Jack", NULL),68};69 70static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)71{72 struct snd_soc_card *card = rtd->card;73 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);74 struct snd_soc_component *component = codec_dai->component;75 struct imx_hdmi_data *data = snd_soc_card_get_drvdata(card);76 int ret;77 78 data->hdmi_jack_pin.pin = "HDMI Jack";79 data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;80 /* enable jack detection */81 ret = snd_soc_card_jack_new_pins(card, "HDMI Jack", SND_JACK_LINEOUT,82 &data->hdmi_jack,83 &data->hdmi_jack_pin, 1);84 if (ret) {85 dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);86 return ret;87 }88 89 ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);90 if (ret && ret != -ENOTSUPP) {91 dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);92 return ret;93 }94 95 return 0;96};97 98static int imx_hdmi_probe(struct platform_device *pdev)99{100 struct device_node *np = pdev->dev.of_node;101 bool hdmi_out = of_property_read_bool(np, "hdmi-out");102 bool hdmi_in = of_property_read_bool(np, "hdmi-in");103 struct snd_soc_dai_link_component *dlc;104 struct platform_device *cpu_pdev;105 struct device_node *cpu_np;106 struct imx_hdmi_data *data;107 int ret;108 109 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);110 if (!dlc)111 return -ENOMEM;112 113 cpu_np = of_parse_phandle(np, "audio-cpu", 0);114 if (!cpu_np) {115 dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");116 ret = -EINVAL;117 goto fail;118 }119 120 cpu_pdev = of_find_device_by_node(cpu_np);121 if (!cpu_pdev) {122 dev_err(&pdev->dev, "failed to find SAI platform device\n");123 ret = -EINVAL;124 goto fail;125 }126 127 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);128 if (!data) {129 ret = -ENOMEM;130 put_device(&cpu_pdev->dev);131 goto fail;132 }133 134 data->dai.cpus = &dlc[0];135 data->dai.num_cpus = 1;136 data->dai.platforms = &dlc[1];137 data->dai.num_platforms = 1;138 data->dai.codecs = &dlc[2];139 data->dai.num_codecs = 1;140 141 data->dai.name = "i.MX HDMI";142 data->dai.stream_name = "i.MX HDMI";143 data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);144 data->dai.platforms->of_node = cpu_np;145 data->dai.ops = &imx_hdmi_ops;146 data->dai.playback_only = true;147 data->dai.capture_only = false;148 data->dai.init = imx_hdmi_init;149 150 put_device(&cpu_pdev->dev);151 152 if (of_node_name_eq(cpu_np, "sai")) {153 data->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;154 data->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;155 }156 157 if (of_device_is_compatible(np, "fsl,imx-audio-sii902x")) {158 data->dai_fmt = SND_SOC_DAIFMT_LEFT_J;159 data->cpu_priv.slot_width = 24;160 } else {161 data->dai_fmt = SND_SOC_DAIFMT_I2S;162 data->cpu_priv.slot_width = 32;163 }164 165 if ((hdmi_out && hdmi_in) || (!hdmi_out && !hdmi_in)) {166 dev_err(&pdev->dev, "Invalid HDMI DAI link\n");167 ret = -EINVAL;168 goto fail;169 }170 171 if (hdmi_out) {172 data->dai.playback_only = true;173 data->dai.capture_only = false;174 data->dai.codecs->dai_name = "i2s-hifi";175 data->dai.codecs->name = "hdmi-audio-codec.1";176 data->dai.dai_fmt = data->dai_fmt |177 SND_SOC_DAIFMT_NB_NF |178 SND_SOC_DAIFMT_CBC_CFC;179 }180 181 if (hdmi_in) {182 data->dai.playback_only = false;183 data->dai.capture_only = true;184 data->dai.codecs->dai_name = "i2s-hifi";185 data->dai.codecs->name = "hdmi-audio-codec.2";186 data->dai.dai_fmt = data->dai_fmt |187 SND_SOC_DAIFMT_NB_NF |188 SND_SOC_DAIFMT_CBP_CFP;189 }190 191 data->card.dapm_widgets = imx_hdmi_widgets;192 data->card.num_dapm_widgets = ARRAY_SIZE(imx_hdmi_widgets);193 data->card.dev = &pdev->dev;194 data->card.owner = THIS_MODULE;195 ret = snd_soc_of_parse_card_name(&data->card, "model");196 if (ret)197 goto fail;198 199 data->card.num_links = 1;200 data->card.dai_link = &data->dai;201 202 snd_soc_card_set_drvdata(&data->card, data);203 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);204 if (ret) {205 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");206 goto fail;207 }208 209fail:210 of_node_put(cpu_np);211 212 return ret;213}214 215static const struct of_device_id imx_hdmi_dt_ids[] = {216 { .compatible = "fsl,imx-audio-hdmi", },217 { .compatible = "fsl,imx-audio-sii902x", },218 { /* sentinel */ }219};220MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);221 222static struct platform_driver imx_hdmi_driver = {223 .driver = {224 .name = "imx-hdmi",225 .pm = &snd_soc_pm_ops,226 .of_match_table = imx_hdmi_dt_ids,227 },228 .probe = imx_hdmi_probe,229};230module_platform_driver(imx_hdmi_driver);231 232MODULE_AUTHOR("Freescale Semiconductor, Inc.");233MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");234MODULE_LICENSE("GPL v2");235MODULE_ALIAS("platform:imx-hdmi");236