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
imx_hdmi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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
imx_hdmi_init(struct snd_soc_pcm_runtime * rtd)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
imx_hdmi_probe(struct platform_device * pdev)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