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"); 237