1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Rockchip machine ASoC driver for Rockchip HDMI audio
4 *
5 * Copyright (C) 2021 Rockchip Electronics Co., Ltd
6 *
7 * Authors: XiaoTan Luo <lxt@rock-chips.com>
8 *
9 */
10
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/slab.h>
14 #include <sound/core.h>
15 #include <sound/jack.h>
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/soc.h>
19 #include <sound/soc-dapm.h>
20
21 #define DRV_NAME "rk-hdmi-sound"
22 #define MAX_CODECS 2
23 #define DEFAULT_MCLK_FS 256
24
25 struct rk_hdmi_data {
26 struct snd_soc_card card;
27 struct snd_soc_dai_link dai;
28 struct snd_soc_jack hdmi_jack;
29 struct snd_soc_jack_pin hdmi_jack_pin;
30 unsigned int mclk_fs;
31 bool jack_det;
32 };
33
rk_hdmi_fill_widget_info(struct device * dev,struct snd_soc_dapm_widget * w,enum snd_soc_dapm_type id,void * priv,const char * wname,const char * stream,struct snd_kcontrol_new * wc,int numkc,int (* event)(struct snd_soc_dapm_widget *,struct snd_kcontrol *,int),unsigned short event_flags)34 static int rk_hdmi_fill_widget_info(struct device *dev,
35 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_type id,
36 void *priv, const char *wname, const char *stream,
37 struct snd_kcontrol_new *wc, int numkc,
38 int (*event)(struct snd_soc_dapm_widget *,
39 struct snd_kcontrol *, int), unsigned short event_flags)
40 {
41 w->id = id;
42 w->name = devm_kstrdup(dev, wname, GFP_KERNEL);
43 if (!w->name)
44 return -ENOMEM;
45
46 w->sname = stream;
47 w->reg = SND_SOC_NOPM;
48 w->shift = 0;
49 w->kcontrol_news = wc;
50 w->num_kcontrols = numkc;
51 w->priv = priv;
52 w->event = event;
53 w->event_flags = event_flags;
54
55 return 0;
56 }
57
rk_dailink_init(struct snd_soc_pcm_runtime * rtd)58 static int rk_dailink_init(struct snd_soc_pcm_runtime *rtd)
59 {
60 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
61 struct snd_soc_card *card = rtd->card;
62 struct rk_hdmi_data *rk_data = snd_soc_card_get_drvdata(rtd->card);
63 struct device *dev = rtd->card->dev;
64 int ret = 0;
65 struct snd_soc_dapm_widget *widgets;
66
67 if (!rk_data->jack_det)
68 return 0;
69
70 widgets = devm_kcalloc(card->dapm.dev, 1,
71 sizeof(*widgets), GFP_KERNEL);
72 if (!widgets)
73 return -ENOMEM;
74
75 ret = rk_hdmi_fill_widget_info(card->dapm.dev, widgets,
76 snd_soc_dapm_line, NULL,
77 rk_data->hdmi_jack_pin.pin,
78 NULL, NULL, 0, NULL, 0);
79 if (ret < 0)
80 return ret;
81
82 ret = snd_soc_dapm_new_controls(&card->dapm, widgets, 1);
83 if (ret < 0)
84 return ret;
85
86 ret = snd_soc_dapm_new_widgets(rtd->card);
87 if (ret < 0)
88 return ret;
89
90 ret = snd_soc_card_jack_new(rtd->card,
91 rk_data->hdmi_jack_pin.pin,
92 rk_data->hdmi_jack_pin.mask,
93 &rk_data->hdmi_jack,
94 &rk_data->hdmi_jack_pin, 1);
95 if (ret) {
96 dev_err(dev, "Can't new HDMI Jack %d\n", ret);
97 return ret;
98 }
99 return snd_soc_component_set_jack(codec_dai->component,
100 &rk_data->hdmi_jack, NULL);
101
102 }
103
rk_hdmi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)104 static int rk_hdmi_hw_params(struct snd_pcm_substream *substream,
105 struct snd_pcm_hw_params *params)
106 {
107 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
108 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
109 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
110 struct rk_hdmi_data *rk_data = snd_soc_card_get_drvdata(rtd->card);
111 unsigned int mclk;
112 int ret;
113
114 mclk = params_rate(params) * rk_data->mclk_fs;
115
116 ret = snd_soc_dai_set_sysclk(codec_dai, substream->stream, mclk,
117 SND_SOC_CLOCK_IN);
118 if (ret && ret != -ENOTSUPP) {
119 dev_err(codec_dai->dev,
120 "Set codec_dai sysclk failed: %d\n", ret);
121 return ret;
122 }
123
124 ret = snd_soc_dai_set_sysclk(cpu_dai, substream->stream, mclk,
125 SND_SOC_CLOCK_OUT);
126 if (ret && ret != -ENOTSUPP) {
127 dev_err(cpu_dai->dev,
128 "Set cpu_dai sysclk failed: %d\n", ret);
129 return ret;
130 }
131
132 return 0;
133
134 }
135
136 static const struct snd_soc_ops rk_ops = {
137 .hw_params = rk_hdmi_hw_params,
138 };
139
rk_hdmi_parse_daifmt(struct device_node * node,struct device_node * cpu,char * prefix)140 static unsigned int rk_hdmi_parse_daifmt(struct device_node *node,
141 struct device_node *cpu,
142 char *prefix)
143 {
144 struct device_node *bitclkmaster = NULL;
145 struct device_node *framemaster = NULL;
146 unsigned int daifmt;
147
148 daifmt = snd_soc_of_parse_daifmt(node, prefix,
149 &bitclkmaster, &framemaster);
150 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
151
152 if (!bitclkmaster || cpu == bitclkmaster)
153 daifmt |= (!framemaster || cpu == framemaster) ?
154 SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
155 else
156 daifmt |= (!framemaster || cpu == framemaster) ?
157 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
158
159 /*
160 * If there is NULL format means that the format isn't specified, we
161 * need to set i2s format by default.
162 */
163 if (!(daifmt & SND_SOC_DAIFMT_FORMAT_MASK))
164 daifmt |= SND_SOC_DAIFMT_I2S;
165
166 of_node_put(bitclkmaster);
167 of_node_put(framemaster);
168 return daifmt;
169 }
170
rk_hdmi_probe(struct platform_device * pdev)171 static int rk_hdmi_probe(struct platform_device *pdev)
172 {
173 struct device_node *np = pdev->dev.of_node;
174 struct snd_soc_dai_link_component *codecs;
175 struct snd_soc_dai_link_component *platforms;
176 struct snd_soc_dai_link_component *cpus;
177 struct of_phandle_args args;
178 struct device_node *cpu_np;
179 struct rk_hdmi_data *rk_data;
180 int count;
181 u32 val;
182 int ret = 0, i = 0, idx = 0;
183
184 rk_data = devm_kzalloc(&pdev->dev, sizeof(*rk_data), GFP_KERNEL);
185 if (!rk_data)
186 return -ENOMEM;
187
188 cpus = devm_kzalloc(&pdev->dev, sizeof(*cpus), GFP_KERNEL);
189 if (!cpus)
190 return -ENOMEM;
191
192 platforms = devm_kzalloc(&pdev->dev, sizeof(*platforms), GFP_KERNEL);
193 if (!platforms)
194 return -ENOMEM;
195
196 rk_data->card.dev = &pdev->dev;
197 rk_data->dai.init = &rk_dailink_init;
198 rk_data->dai.ops = &rk_ops;
199 rk_data->dai.cpus = cpus;
200 rk_data->dai.platforms = platforms;
201 rk_data->dai.num_cpus = 1;
202 rk_data->dai.num_platforms = 1;
203 /* Parse the card name from DT */
204 ret = snd_soc_of_parse_card_name(&rk_data->card, "rockchip,card-name");
205 if (ret < 0)
206 return ret;
207 rk_data->dai.name = rk_data->card.name;
208 rk_data->dai.stream_name = rk_data->card.name;
209 count = of_count_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells");
210 if (count < 0 || count > MAX_CODECS)
211 return -EINVAL;
212
213 /* refine codecs, remove unavailable node */
214 for (i = 0; i < count; i++) {
215 ret = of_parse_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells", i, &args);
216 if (ret) {
217 dev_err(&pdev->dev, "error getting codec phandle index %d\n", i);
218 return -ENODEV;
219 }
220 if (of_device_is_available(args.np))
221 idx++;
222 of_node_put(args.np);
223 }
224
225 if (!idx)
226 return -ENODEV;
227
228 codecs = devm_kcalloc(&pdev->dev, idx,
229 sizeof(*codecs), GFP_KERNEL);
230 if (!codecs)
231 return -ENOMEM;
232
233 rk_data->dai.codecs = codecs;
234 rk_data->dai.num_codecs = idx;
235 idx = 0;
236 for (i = 0; i < count; i++) {
237 ret = of_parse_phandle_with_args(np, "rockchip,codec", "#sound-dai-cells", i, &args);
238 if (ret) {
239 dev_err(&pdev->dev, "error getting codec phandle index %d\n", i);
240 return -ENODEV;
241 }
242 if (!of_device_is_available(args.np)) {
243 of_node_put(args.np);
244 continue;
245 }
246 codecs[idx].of_node = args.np;
247 ret = snd_soc_get_dai_name(&args, &codecs[idx].dai_name);
248 if (ret)
249 return ret;
250 idx++;
251 }
252
253 cpu_np = of_parse_phandle(np, "rockchip,cpu", 0);
254 if (!cpu_np)
255 return -ENODEV;
256
257 rk_data->dai.dai_fmt = rk_hdmi_parse_daifmt(np, cpu_np, "rockchip,");
258 rk_data->mclk_fs = DEFAULT_MCLK_FS;
259 if (!of_property_read_u32(np, "rockchip,mclk-fs", &val))
260 rk_data->mclk_fs = val;
261
262 rk_data->jack_det =
263 of_property_read_bool(np, "rockchip,jack-det");
264
265 rk_data->dai.cpus->of_node = cpu_np;
266 rk_data->dai.platforms->of_node = cpu_np;
267 of_node_put(cpu_np);
268
269 rk_data->hdmi_jack_pin.pin = rk_data->card.name;
270 rk_data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
271 rk_data->card.num_links = 1;
272 rk_data->card.owner = THIS_MODULE;
273 rk_data->card.dai_link = &rk_data->dai;
274
275 snd_soc_card_set_drvdata(&rk_data->card, rk_data);
276 ret = devm_snd_soc_register_card(&pdev->dev, &rk_data->card);
277 if (ret == -EPROBE_DEFER)
278 return -EPROBE_DEFER;
279 if (ret) {
280 dev_err(&pdev->dev, "card register failed %d\n", ret);
281 return ret;
282 }
283 platform_set_drvdata(pdev, &rk_data->card);
284
285 return ret;
286 }
287
288 static const struct of_device_id rockchip_sound_of_match[] = {
289 { .compatible = "rockchip,hdmi", },
290 {},
291 };
292
293 MODULE_DEVICE_TABLE(of, rockchip_sound_of_match);
294
295 static struct platform_driver rockchip_sound_driver = {
296 .probe = rk_hdmi_probe,
297 .driver = {
298 .name = DRV_NAME,
299 .pm = &snd_soc_pm_ops,
300 .of_match_table = rockchip_sound_of_match,
301 },
302 };
303
304 module_platform_driver(rockchip_sound_driver);
305
306 MODULE_AUTHOR("XiaoTan Luo <lxt@rock-chips.com>");
307 MODULE_DESCRIPTION("Rockchip HDMI ASoC machine driver");
308 MODULE_LICENSE("GPL v2");
309 MODULE_ALIAS("platform:" DRV_NAME);
310