1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright 2017-2020 NXP
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>
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
18 * Note: [1] for tx and [0] for rx
21 unsigned long sysclk_freq[2];
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;
36 static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,
37 struct snd_pcm_hw_params *params)
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;
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);
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);
66 static struct snd_soc_ops imx_hdmi_ops = {
67 .hw_params = imx_hdmi_hw_params,
70 static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
71 SND_SOC_DAPM_LINE("HDMI Jack", NULL),
74 static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)
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);
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);
88 dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);
92 ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);
93 if (ret && ret != -ENOTSUPP) {
94 dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);
101 static int imx_hdmi_probe(struct platform_device *pdev)
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;
112 dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
116 cpu_np = of_parse_phandle(np, "audio-cpu", 0);
118 dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
123 cpu_pdev = of_find_device_by_node(cpu_np);
125 dev_err(&pdev->dev, "failed to find SAI platform device\n");
130 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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;
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;
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;
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;
161 data->dai_fmt = SND_SOC_DAIFMT_I2S;
162 data->cpu_priv.slot_width = 32;
165 if ((hdmi_out && hdmi_in) || (!hdmi_out && !hdmi_in)) {
166 dev_err(&pdev->dev, "Invalid HDMI DAI link\n");
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_CBS_CFS;
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_CBM_CFM;
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");
199 data->card.num_links = 1;
200 data->card.dai_link = &data->dai;
202 snd_soc_card_set_drvdata(&data->card, data);
203 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
205 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
216 static const struct of_device_id imx_hdmi_dt_ids[] = {
217 { .compatible = "fsl,imx-audio-hdmi", },
218 { .compatible = "fsl,imx-audio-sii902x", },
221 MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
223 static struct platform_driver imx_hdmi_driver = {
226 .owner = THIS_MODULE,
227 .pm = &snd_soc_pm_ops,
228 .of_match_table = imx_hdmi_dt_ids,
230 .probe = imx_hdmi_probe,
232 module_platform_driver(imx_hdmi_driver);
234 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
235 MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
236 MODULE_LICENSE("GPL v2");
237 MODULE_ALIAS("platform:imx-hdmi");