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 = substream->private_data; 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 = asoc_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 = asoc_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"); 236