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(card: 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(dai: cpu_dai, clk_id: data->cpu_priv.sysclk_id[tx], |
46 | freq: 8 * slot_width * params_rate(p: params), |
47 | dir: 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(dai: cpu_dai, tx_mask: 0, rx_mask: 0, slots: 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 = 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, id: "HDMI Jack" , type: SND_JACK_LINEOUT, |
82 | jack: &data->hdmi_jack, |
83 | pins: &data->hdmi_jack_pin, num_pins: 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, jack: &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, propname: "hdmi-out" ); |
102 | bool hdmi_in = of_property_read_bool(np, propname: "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(dev: &pdev->dev, size: 3 * sizeof(*dlc), GFP_KERNEL); |
110 | if (!dlc) |
111 | return -ENOMEM; |
112 | |
113 | cpu_np = of_parse_phandle(np, phandle_name: "audio-cpu" , index: 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(np: 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(dev: &pdev->dev, size: sizeof(*data), GFP_KERNEL); |
128 | if (!data) { |
129 | ret = -ENOMEM; |
130 | put_device(dev: &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(dev: &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(dev: &cpu_pdev->dev); |
151 | |
152 | if (of_node_name_eq(np: cpu_np, name: "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(device: 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(card: &data->card, propname: "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(card: &data->card, data); |
203 | ret = devm_snd_soc_register_card(dev: &pdev->dev, card: &data->card); |
204 | if (ret) { |
205 | dev_err_probe(dev: &pdev->dev, err: ret, fmt: "snd_soc_register_card failed\n" ); |
206 | goto fail; |
207 | } |
208 | |
209 | fail: |
210 | of_node_put(node: 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 | |