sound/soc/fsl/imx-hdmi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright 2017-2020 NXP
   3
   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 data
  13  * @sysclk_id: SYSCLK ids for set_sysclk()
  14  * @slot_width: Slot width of each frame
  15  *
  16  * Note: [1] for tx and [0] for rx
  17  */
  18 struct cpu_priv {
  19         u32 sysclk_id[2];
  20         u32 slot_width;
  21 };
  22
  23 struct 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
  32 static 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
  62 static const struct snd_soc_ops imx_hdmi_ops = {
  63         .hw_params = imx_hdmi_hw_params,
  64 };
  65
  66 static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
  67         SND_SOC_DAPM_LINE("HDMI Jack", NULL),
  68 };
  69
  70 static 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
  98 static 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
 209 fail:
 210         of_node_put(cpu_np);
 211
 212         return ret;
 213 }
 214
 215 static const struct of_device_id imx_hdmi_dt_ids[] = {
 216         { .compatible = "fsl,imx-audio-hdmi", },
 217         { .compatible = "fsl,imx-audio-sii902x", },
 218         { /* sentinel */ }
 219 };
 220 MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
 221
 222 static 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 };
 230 module_platform_driver(imx_hdmi_driver);
 231
 232 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 233 MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
 234 MODULE_LICENSE("GPL v2");
 235 MODULE_ALIAS("platform:imx-hdmi");