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_freq: SYSCLK rates for set_sysclk()
  14  * @sysclk_dir: SYSCLK directions for set_sysclk()
  15  * @sysclk_id: SYSCLK ids for set_sysclk()
  16  * @slot_width: Slot width of each frame
  17  *
  18  * Note: [1] for tx and [0] for rx
  19  */
  20 struct cpu_priv {
  21         unsigned long sysclk_freq[2];
  22         u32 sysclk_dir[2];
  23         u32 sysclk_id[2];
  24         u32 slot_width;
  25 };
  26
  27 struct imx_hdmi_data {
  28         struct snd_soc_dai_link dai;
  29         struct snd_soc_card card;
  30         struct snd_soc_jack hdmi_jack;
  31         struct snd_soc_jack_pin hdmi_jack_pin;
  32         struct cpu_priv cpu_priv;
  33         u32 dai_fmt;
  34 };
  35
  36 static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,
  37                               struct snd_pcm_hw_params *params)
  38 {
  39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  40         struct imx_hdmi_data *data = snd_soc_card_get_drvdata(rtd->card);
  41         bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
  42         struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  43         struct snd_soc_card *card = rtd->card;
  44         struct device *dev = card->dev;
  45         u32 slot_width = data->cpu_priv.slot_width;
  46         int ret;
  47
  48         /* MCLK always is (256 or 192) * rate. */
  49         ret = snd_soc_dai_set_sysclk(cpu_dai, data->cpu_priv.sysclk_id[tx],
  50                                      8 * slot_width * params_rate(params),
  51                                      tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);
  52         if (ret && ret != -ENOTSUPP) {
  53                 dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
  54                 return ret;
  55         }
  56
  57         ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, slot_width);
  58         if (ret && ret != -ENOTSUPP) {
  59                 dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
  60                 return ret;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static struct snd_soc_ops imx_hdmi_ops = {
  67         .hw_params = imx_hdmi_hw_params,
  68 };
  69
  70 static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
  71         SND_SOC_DAPM_LINE("HDMI Jack", NULL),
  72 };
  73
  74 static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)
  75 {
  76         struct snd_soc_card *card = rtd->card;
  77         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  78         struct snd_soc_component *component = codec_dai->component;
  79         struct imx_hdmi_data *data = snd_soc_card_get_drvdata(card);
  80         int ret;
  81
  82         data->hdmi_jack_pin.pin = "HDMI Jack";
  83         data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
  84         /* enable jack detection */
  85         ret = snd_soc_card_jack_new(card, "HDMI Jack", SND_JACK_LINEOUT,
  86                                     &data->hdmi_jack, &data->hdmi_jack_pin, 1);
  87         if (ret) {
  88                 dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);
  89                 return ret;
  90         }
  91
  92         ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);
  93         if (ret && ret != -EOPNOTSUPP) {
  94                 dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);
  95                 return ret;
  96         }
  97
  98         return 0;
  99 };
 100
 101 static int imx_hdmi_probe(struct platform_device *pdev)
 102 {
 103         struct device_node *np = pdev->dev.of_node;
 104         bool hdmi_out = of_property_read_bool(np, "hdmi-out");
 105         bool hdmi_in = of_property_read_bool(np, "hdmi-in");
 106         struct snd_soc_dai_link_component *dlc;
 107         struct platform_device *cpu_pdev;
 108         struct device_node *cpu_np;
 109         struct imx_hdmi_data *data;
 110         int ret;
 111
 112         dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
 113         if (!dlc)
 114                 return -ENOMEM;
 115
 116         cpu_np = of_parse_phandle(np, "audio-cpu", 0);
 117         if (!cpu_np) {
 118                 dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
 119                 ret = -EINVAL;
 120                 goto fail;
 121         }
 122
 123         cpu_pdev = of_find_device_by_node(cpu_np);
 124         if (!cpu_pdev) {
 125                 dev_err(&pdev->dev, "failed to find SAI platform device\n");
 126                 ret = -EINVAL;
 127                 goto fail;
 128         }
 129
 130         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 131         if (!data) {
 132                 ret = -ENOMEM;
 133                 goto fail;
 134         }
 135
 136         data->dai.cpus = &dlc[0];
 137         data->dai.num_cpus = 1;
 138         data->dai.platforms = &dlc[1];
 139         data->dai.num_platforms = 1;
 140         data->dai.codecs = &dlc[2];
 141         data->dai.num_codecs = 1;
 142
 143         data->dai.name = "i.MX HDMI";
 144         data->dai.stream_name = "i.MX HDMI";
 145         data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
 146         data->dai.platforms->of_node = cpu_np;
 147         data->dai.ops = &imx_hdmi_ops;
 148         data->dai.playback_only = true;
 149         data->dai.capture_only = false;
 150         data->dai.init = imx_hdmi_init;
 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                 goto fail;
 168         }
 169
 170         if (hdmi_out) {
 171                 data->dai.playback_only = true;
 172                 data->dai.capture_only = false;
 173                 data->dai.codecs->dai_name = "i2s-hifi";
 174                 data->dai.codecs->name = "hdmi-audio-codec.1";
 175                 data->dai.dai_fmt = data->dai_fmt |
 176                                     SND_SOC_DAIFMT_NB_NF |
 177                                     SND_SOC_DAIFMT_CBS_CFS;
 178         }
 179
 180         if (hdmi_in) {
 181                 data->dai.playback_only = false;
 182                 data->dai.capture_only = true;
 183                 data->dai.codecs->dai_name = "i2s-hifi";
 184                 data->dai.codecs->name = "hdmi-audio-codec.2";
 185                 data->dai.dai_fmt = data->dai_fmt |
 186                                     SND_SOC_DAIFMT_NB_NF |
 187                                     SND_SOC_DAIFMT_CBM_CFM;
 188         }
 189
 190         data->card.dapm_widgets = imx_hdmi_widgets;
 191         data->card.num_dapm_widgets = ARRAY_SIZE(imx_hdmi_widgets);
 192         data->card.dev = &pdev->dev;
 193         data->card.owner = THIS_MODULE;
 194         ret = snd_soc_of_parse_card_name(&data->card, "model");
 195         if (ret)
 196                 goto fail;
 197
 198         data->card.num_links = 1;
 199         data->card.dai_link = &data->dai;
 200
 201         snd_soc_card_set_drvdata(&data->card, data);
 202         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
 203         if (ret) {
 204                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 205                 goto fail;
 206         }
 207
 208 fail:
 209         if (cpu_np)
 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                 .owner = THIS_MODULE,
 226                 .pm = &snd_soc_pm_ops,
 227                 .of_match_table = imx_hdmi_dt_ids,
 228         },
 229         .probe = imx_hdmi_probe,
 230 };
 231 module_platform_driver(imx_hdmi_driver);
 232
 233 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 234 MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
 235 MODULE_LICENSE("GPL v2");
 236 MODULE_ALIAS("platform:imx-hdmi");