This source file includes following definitions.
- hdmi_write
- hdmi_read
- dw_hdmi_i2s_hw_params
- dw_hdmi_i2s_audio_shutdown
- dw_hdmi_i2s_get_eld
- dw_hdmi_i2s_get_dai_id
- snd_dw_hdmi_probe
- snd_dw_hdmi_remove
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9 #include <linux/dma-mapping.h>
10 #include <linux/module.h>
11
12 #include <drm/bridge/dw_hdmi.h>
13 #include <drm/drm_crtc.h>
14
15 #include <sound/hdmi-codec.h>
16
17 #include "dw-hdmi.h"
18 #include "dw-hdmi-audio.h"
19
20 #define DRIVER_NAME "dw-hdmi-i2s-audio"
21
22 static inline void hdmi_write(struct dw_hdmi_i2s_audio_data *audio,
23 u8 val, int offset)
24 {
25 struct dw_hdmi *hdmi = audio->hdmi;
26
27 audio->write(hdmi, val, offset);
28 }
29
30 static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
31 {
32 struct dw_hdmi *hdmi = audio->hdmi;
33
34 return audio->read(hdmi, offset);
35 }
36
37 static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
38 struct hdmi_codec_daifmt *fmt,
39 struct hdmi_codec_params *hparms)
40 {
41 struct dw_hdmi_i2s_audio_data *audio = data;
42 struct dw_hdmi *hdmi = audio->hdmi;
43 u8 conf0 = 0;
44 u8 conf1 = 0;
45 u8 inputclkfs = 0;
46
47
48 if (fmt->bit_clk_master | fmt->frame_clk_master) {
49 dev_err(dev, "unsupported clock settings\n");
50 return -EINVAL;
51 }
52
53
54 hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
55 hdmi_write(audio, (u8)~HDMI_MC_SWRSTZ_I2SSWRST_REQ, HDMI_MC_SWRSTZ);
56
57 inputclkfs = HDMI_AUD_INPUTCLKFS_64FS;
58 conf0 = (HDMI_AUD_CONF0_I2S_SELECT | HDMI_AUD_CONF0_I2S_EN0);
59
60
61 switch (hparms->channels) {
62 case 7 ... 8:
63 conf0 |= HDMI_AUD_CONF0_I2S_EN3;
64
65 case 5 ... 6:
66 conf0 |= HDMI_AUD_CONF0_I2S_EN2;
67
68 case 3 ... 4:
69 conf0 |= HDMI_AUD_CONF0_I2S_EN1;
70
71 }
72
73 switch (hparms->sample_width) {
74 case 16:
75 conf1 = HDMI_AUD_CONF1_WIDTH_16;
76 break;
77 case 24:
78 case 32:
79 conf1 = HDMI_AUD_CONF1_WIDTH_24;
80 break;
81 }
82
83 switch (fmt->fmt) {
84 case HDMI_I2S:
85 conf1 |= HDMI_AUD_CONF1_MODE_I2S;
86 break;
87 case HDMI_RIGHT_J:
88 conf1 |= HDMI_AUD_CONF1_MODE_RIGHT_J;
89 break;
90 case HDMI_LEFT_J:
91 conf1 |= HDMI_AUD_CONF1_MODE_LEFT_J;
92 break;
93 case HDMI_DSP_A:
94 conf1 |= HDMI_AUD_CONF1_MODE_BURST_1;
95 break;
96 case HDMI_DSP_B:
97 conf1 |= HDMI_AUD_CONF1_MODE_BURST_2;
98 break;
99 default:
100 dev_err(dev, "unsupported format\n");
101 return -EINVAL;
102 }
103
104 dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate);
105 dw_hdmi_set_channel_count(hdmi, hparms->channels);
106 dw_hdmi_set_channel_allocation(hdmi, hparms->cea.channel_allocation);
107
108 hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
109 hdmi_write(audio, conf0, HDMI_AUD_CONF0);
110 hdmi_write(audio, conf1, HDMI_AUD_CONF1);
111
112 dw_hdmi_audio_enable(hdmi);
113
114 return 0;
115 }
116
117 static void dw_hdmi_i2s_audio_shutdown(struct device *dev, void *data)
118 {
119 struct dw_hdmi_i2s_audio_data *audio = data;
120 struct dw_hdmi *hdmi = audio->hdmi;
121
122 dw_hdmi_audio_disable(hdmi);
123 }
124
125 static int dw_hdmi_i2s_get_eld(struct device *dev, void *data, uint8_t *buf,
126 size_t len)
127 {
128 struct dw_hdmi_i2s_audio_data *audio = data;
129
130 memcpy(buf, audio->eld, min_t(size_t, MAX_ELD_BYTES, len));
131 return 0;
132 }
133
134 static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
135 struct device_node *endpoint)
136 {
137 struct of_endpoint of_ep;
138 int ret;
139
140 ret = of_graph_parse_endpoint(endpoint, &of_ep);
141 if (ret < 0)
142 return ret;
143
144
145
146
147
148 if (of_ep.port == 2)
149 return 0;
150
151 return -EINVAL;
152 }
153
154 static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
155 .hw_params = dw_hdmi_i2s_hw_params,
156 .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
157 .get_eld = dw_hdmi_i2s_get_eld,
158 .get_dai_id = dw_hdmi_i2s_get_dai_id,
159 };
160
161 static int snd_dw_hdmi_probe(struct platform_device *pdev)
162 {
163 struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
164 struct platform_device_info pdevinfo;
165 struct hdmi_codec_pdata pdata;
166 struct platform_device *platform;
167
168 pdata.ops = &dw_hdmi_i2s_ops;
169 pdata.i2s = 1;
170 pdata.max_i2s_channels = 8;
171 pdata.data = audio;
172
173 memset(&pdevinfo, 0, sizeof(pdevinfo));
174 pdevinfo.parent = pdev->dev.parent;
175 pdevinfo.id = PLATFORM_DEVID_AUTO;
176 pdevinfo.name = HDMI_CODEC_DRV_NAME;
177 pdevinfo.data = &pdata;
178 pdevinfo.size_data = sizeof(pdata);
179 pdevinfo.dma_mask = DMA_BIT_MASK(32);
180
181 platform = platform_device_register_full(&pdevinfo);
182 if (IS_ERR(platform))
183 return PTR_ERR(platform);
184
185 dev_set_drvdata(&pdev->dev, platform);
186
187 return 0;
188 }
189
190 static int snd_dw_hdmi_remove(struct platform_device *pdev)
191 {
192 struct platform_device *platform = dev_get_drvdata(&pdev->dev);
193
194 platform_device_unregister(platform);
195
196 return 0;
197 }
198
199 static struct platform_driver snd_dw_hdmi_driver = {
200 .probe = snd_dw_hdmi_probe,
201 .remove = snd_dw_hdmi_remove,
202 .driver = {
203 .name = DRIVER_NAME,
204 },
205 };
206 module_platform_driver(snd_dw_hdmi_driver);
207
208 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
209 MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
210 MODULE_LICENSE("GPL v2");
211 MODULE_ALIAS("platform:" DRIVER_NAME);