1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation
4 //
5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
6 // Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
7 //
8
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <sound/hda_codec.h>
12 #include <sound/hda_i915.h>
13 #include <sound/soc.h>
14 #include <sound/soc-acpi.h>
15 #include "../../../codecs/hda.h"
16
17 static int avs_create_dai_links(struct device *dev, struct hda_codec *codec, int pcm_count,
18 const char *platform_name, struct snd_soc_dai_link **links)
19 {
20 struct snd_soc_dai_link_component *platform;
21 struct snd_soc_dai_link *dl;
22 struct hda_pcm *pcm;
23 const char *cname = dev_name(&codec->core.dev);
24 int i;
25
26 dl = devm_kcalloc(dev, pcm_count, sizeof(*dl), GFP_KERNEL);
27 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
28 if (!dl || !platform)
29 return -ENOMEM;
30
31 platform->name = platform_name;
32 pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list);
33
34 for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) {
35 dl[i].name = devm_kasprintf(dev, GFP_KERNEL, "%s link%d", cname, i);
36 if (!dl[i].name)
37 return -ENOMEM;
38
39 dl[i].id = i;
40 dl[i].nonatomic = 1;
41 dl[i].no_pcm = 1;
42 dl[i].dpcm_playback = 1;
43 dl[i].dpcm_capture = 1;
44 dl[i].platforms = platform;
45 dl[i].num_platforms = 1;
46 dl[i].ignore_pmdown_time = 1;
47
48 dl[i].codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
49 dl[i].cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
50 if (!dl[i].codecs || !dl[i].cpus)
51 return -ENOMEM;
52
53 dl[i].cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "%s-cpu%d", cname, i);
54 if (!dl[i].cpus->dai_name)
55 return -ENOMEM;
56
57 dl[i].codecs->name = devm_kstrdup_const(dev, cname, GFP_KERNEL);
58 if (!dl[i].codecs->name)
59 return -ENOMEM;
60
61 dl[i].codecs->dai_name = pcm->name;
62 dl[i].num_codecs = 1;
63 dl[i].num_cpus = 1;
64 }
65
66 *links = dl;
67 return 0;
68 }
69
70 /* Should be aligned with SectionPCM's name from topology */
71 #define FEDAI_NAME_PREFIX "HDMI"
72
73 static struct snd_pcm *
74 avs_card_hdmi_pcm_at(struct snd_soc_card *card, int hdmi_idx)
75 {
76 struct snd_soc_pcm_runtime *rtd;
77 int dir = SNDRV_PCM_STREAM_PLAYBACK;
78
79 for_each_card_rtds(card, rtd) {
80 struct snd_pcm *spcm;
81 int ret, n;
82
83 spcm = rtd->pcm ? rtd->pcm->streams[dir].pcm : NULL;
84 if (!spcm || !strstr(spcm->id, FEDAI_NAME_PREFIX))
85 continue;
86
87 ret = sscanf(spcm->id, FEDAI_NAME_PREFIX "%d", &n);
88 if (ret != 1)
89 continue;
90 if (n == hdmi_idx)
91 return rtd->pcm;
92 }
93
94 return NULL;
95 }
96
97 static int avs_card_late_probe(struct snd_soc_card *card)
98 {
99 struct snd_soc_acpi_mach *mach = dev_get_platdata(card->dev);
100 struct hda_codec *codec = mach->pdata;
101 struct hda_pcm *hpcm;
102 /* Topology pcm indexing is 1-based */
103 int i = 1;
104
105 list_for_each_entry(hpcm, &codec->pcm_list_head, list) {
106 struct snd_pcm *spcm;
107
108 spcm = avs_card_hdmi_pcm_at(card, i);
109 if (spcm) {
110 hpcm->pcm = spcm;
111 hpcm->device = spcm->device;
112 dev_info(card->dev, "%s: mapping HDMI converter %d to PCM %d (%p)\n",
113 __func__, i, hpcm->device, spcm);
114 } else {
115 hpcm->pcm = NULL;
116 hpcm->device = SNDRV_PCM_INVALID_DEVICE;
117 dev_warn(card->dev, "%s: no PCM in topology for HDMI converter %d\n",
118 __func__, i);
119 }
120 i++;
121 }
122
123 return hda_codec_probe_complete(codec);
124 }
125
126 static int avs_probing_link_init(struct snd_soc_pcm_runtime *rtm)
127 {
128 struct snd_soc_acpi_mach *mach;
129 struct snd_soc_dai_link *links = NULL;
130 struct snd_soc_card *card = rtm->card;
131 struct hda_codec *codec;
132 struct hda_pcm *pcm;
133 int ret, pcm_count = 0;
134
135 mach = dev_get_platdata(card->dev);
136 codec = mach->pdata;
137
138 if (list_empty(&codec->pcm_list_head))
139 return -EINVAL;
140 list_for_each_entry(pcm, &codec->pcm_list_head, list)
141 pcm_count++;
142
143 ret = avs_create_dai_links(card->dev, codec, pcm_count, mach->mach_params.platform, &links);
144 if (ret < 0) {
145 dev_err(card->dev, "create links failed: %d\n", ret);
146 return ret;
147 }
148
149 ret = snd_soc_add_pcm_runtimes(card, links, pcm_count);
150 if (ret < 0) {
151 dev_err(card->dev, "add links failed: %d\n", ret);
152 return ret;
153 }
154
155 return 0;
156 }
157
158 static const struct snd_soc_dai_link probing_link = {
159 .name = "probing-LINK",
160 .id = -1,
161 .nonatomic = 1,
162 .no_pcm = 1,
163 .dpcm_playback = 1,
164 .dpcm_capture = 1,
165 .cpus = &snd_soc_dummy_dlc,
166 .num_cpus = 1,
167 .init = avs_probing_link_init,
168 };
169
170 static int avs_hdaudio_probe(struct platform_device *pdev)
171 {
172 struct snd_soc_dai_link *binder;
173 struct snd_soc_acpi_mach *mach;
174 struct snd_soc_card *card;
175 struct device *dev = &pdev->dev;
176 struct hda_codec *codec;
177
178 mach = dev_get_platdata(dev);
179 codec = mach->pdata;
180
181 /* codec may be unloaded before card's probe() fires */
182 if (!device_is_registered(&codec->core.dev))
183 return -ENODEV;
184
185 binder = devm_kmemdup(dev, &probing_link, sizeof(probing_link), GFP_KERNEL);
186 if (!binder)
187 return -ENOMEM;
188
189 binder->platforms = devm_kzalloc(dev, sizeof(*binder->platforms), GFP_KERNEL);
190 binder->codecs = devm_kzalloc(dev, sizeof(*binder->codecs), GFP_KERNEL);
191 if (!binder->platforms || !binder->codecs)
192 return -ENOMEM;
193
194 binder->codecs->name = devm_kstrdup_const(dev, dev_name(&codec->core.dev), GFP_KERNEL);
195 if (!binder->codecs->name)
196 return -ENOMEM;
197
198 binder->platforms->name = mach->mach_params.platform;
199 binder->num_platforms = 1;
200 binder->codecs->dai_name = "codec-probing-DAI";
201 binder->num_codecs = 1;
202
203 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
204 if (!card)
205 return -ENOMEM;
206
207 card->name = binder->codecs->name;
208 card->dev = dev;
209 card->owner = THIS_MODULE;
210 card->dai_link = binder;
211 card->num_links = 1;
212 card->fully_routed = true;
213 if (hda_codec_is_display(codec))
214 card->late_probe = avs_card_late_probe;
215
216 return devm_snd_soc_register_card(dev, card);
217 }
218
219 static const struct platform_device_id avs_hdaudio_driver_ids[] = {
220 {
221 .name = "avs_hdaudio",
222 },
223 {},
224 };
225 MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids);
226
227 static struct platform_driver avs_hdaudio_driver = {
228 .probe = avs_hdaudio_probe,
229 .driver = {
230 .name = "avs_hdaudio",
231 .pm = &snd_soc_pm_ops,
232 },
233 .id_table = avs_hdaudio_driver_ids,
234 };
235
236 module_platform_driver(avs_hdaudio_driver)
237
238 MODULE_DESCRIPTION("Intel HD-Audio machine driver");
239 MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
240 MODULE_LICENSE("GPL");
241
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