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 #include "../utils.h"
17
avs_create_dai_links(struct device * dev,struct hda_codec * codec,int pcm_count,const char * platform_name,struct snd_soc_dai_link ** links)18 static int avs_create_dai_links(struct device *dev, struct hda_codec *codec, int pcm_count,
19 const char *platform_name, struct snd_soc_dai_link **links)
20 {
21 struct snd_soc_dai_link_component *platform;
22 struct snd_soc_dai_link *dl;
23 struct hda_pcm *pcm;
24 const char *cname = dev_name(&codec->core.dev);
25 int i;
26
27 dl = devm_kcalloc(dev, pcm_count, sizeof(*dl), GFP_KERNEL);
28 platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
29 if (!dl || !platform)
30 return -ENOMEM;
31
32 platform->name = platform_name;
33 pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list);
34
35 for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) {
36 dl[i].name = devm_kasprintf(dev, GFP_KERNEL, "%s link%d", cname, i);
37 if (!dl[i].name)
38 return -ENOMEM;
39
40 dl[i].id = i;
41 dl[i].nonatomic = 1;
42 dl[i].no_pcm = 1;
43 dl[i].platforms = platform;
44 dl[i].num_platforms = 1;
45 dl[i].ignore_pmdown_time = 1;
46
47 dl[i].codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
48 dl[i].cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
49 if (!dl[i].codecs || !dl[i].cpus)
50 return -ENOMEM;
51
52 dl[i].cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "%s-cpu%d", cname, i);
53 if (!dl[i].cpus->dai_name)
54 return -ENOMEM;
55
56 dl[i].codecs->name = devm_kstrdup_const(dev, cname, GFP_KERNEL);
57 if (!dl[i].codecs->name)
58 return -ENOMEM;
59
60 dl[i].codecs->dai_name = pcm->name;
61 dl[i].num_codecs = 1;
62 dl[i].num_cpus = 1;
63 }
64
65 *links = dl;
66 return 0;
67 }
68
69 /* Should be aligned with SectionPCM's name from topology */
70 #define FEDAI_NAME_PREFIX "HDMI"
71
72 static struct snd_pcm *
avs_card_hdmi_pcm_at(struct snd_soc_card * card,int hdmi_idx)73 avs_card_hdmi_pcm_at(struct snd_soc_card *card, int hdmi_idx)
74 {
75 struct snd_soc_pcm_runtime *rtd;
76 int dir = SNDRV_PCM_STREAM_PLAYBACK;
77
78 for_each_card_rtds(card, rtd) {
79 struct snd_pcm *spcm;
80 int ret, n;
81
82 spcm = rtd->pcm ? rtd->pcm->streams[dir].pcm : NULL;
83 if (!spcm || !strstr(spcm->id, FEDAI_NAME_PREFIX))
84 continue;
85
86 ret = sscanf(spcm->id, FEDAI_NAME_PREFIX "%d", &n);
87 if (ret != 1)
88 continue;
89 if (n == hdmi_idx)
90 return rtd->pcm;
91 }
92
93 return NULL;
94 }
95
avs_card_late_probe(struct snd_soc_card * card)96 static int avs_card_late_probe(struct snd_soc_card *card)
97 {
98 struct snd_soc_acpi_mach *mach = dev_get_platdata(card->dev);
99 struct avs_mach_pdata *pdata = mach->pdata;
100 struct hda_codec *codec = pdata->codec;
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
avs_probing_link_init(struct snd_soc_pcm_runtime * rtm)126 static int avs_probing_link_init(struct snd_soc_pcm_runtime *rtm)
127 {
128 struct snd_soc_acpi_mach *mach;
129 struct avs_mach_pdata *pdata;
130 struct snd_soc_dai_link *links = NULL;
131 struct snd_soc_card *card = rtm->card;
132 struct hda_codec *codec;
133 struct hda_pcm *pcm;
134 int ret, pcm_count = 0;
135
136 mach = dev_get_platdata(card->dev);
137 pdata = mach->pdata;
138 codec = pdata->codec;
139
140 if (list_empty(&codec->pcm_list_head))
141 return -EINVAL;
142 list_for_each_entry(pcm, &codec->pcm_list_head, list)
143 pcm_count++;
144
145 ret = avs_create_dai_links(card->dev, codec, pcm_count, mach->mach_params.platform, &links);
146 if (ret < 0) {
147 dev_err(card->dev, "create links failed: %d\n", ret);
148 return ret;
149 }
150
151 ret = snd_soc_add_pcm_runtimes(card, links, pcm_count);
152 if (ret < 0) {
153 dev_err(card->dev, "add links failed: %d\n", ret);
154 return ret;
155 }
156
157 return 0;
158 }
159
160 static const struct snd_soc_dai_link probing_link = {
161 .name = "probing-LINK",
162 .id = -1,
163 .nonatomic = 1,
164 .no_pcm = 1,
165 .cpus = &snd_soc_dummy_dlc,
166 .num_cpus = 1,
167 .init = avs_probing_link_init,
168 };
169
avs_hdaudio_probe(struct platform_device * pdev)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 avs_mach_pdata *pdata;
175 struct snd_soc_card *card;
176 struct device *dev = &pdev->dev;
177 struct hda_codec *codec;
178
179 mach = dev_get_platdata(dev);
180 pdata = mach->pdata;
181 codec = pdata->codec;
182
183 /* codec may be unloaded before card's probe() fires */
184 if (!device_is_registered(&codec->core.dev))
185 return -ENODEV;
186
187 binder = devm_kmemdup(dev, &probing_link, sizeof(probing_link), GFP_KERNEL);
188 if (!binder)
189 return -ENOMEM;
190
191 binder->platforms = devm_kzalloc(dev, sizeof(*binder->platforms), GFP_KERNEL);
192 binder->codecs = devm_kzalloc(dev, sizeof(*binder->codecs), GFP_KERNEL);
193 if (!binder->platforms || !binder->codecs)
194 return -ENOMEM;
195
196 binder->codecs->name = devm_kstrdup_const(dev, dev_name(&codec->core.dev), GFP_KERNEL);
197 if (!binder->codecs->name)
198 return -ENOMEM;
199
200 binder->platforms->name = mach->mach_params.platform;
201 binder->num_platforms = 1;
202 binder->codecs->dai_name = "codec-probing-DAI";
203 binder->num_codecs = 1;
204
205 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
206 if (!card)
207 return -ENOMEM;
208
209 if (pdata->obsolete_card_names) {
210 card->name = binder->codecs->name;
211 } else {
212 card->driver_name = "avs_hdaudio";
213 if (hda_codec_is_display(codec))
214 card->long_name = card->name = "AVS HDMI";
215 else
216 card->long_name = card->name = "AVS HD-Audio";
217 }
218
219 card->dev = dev;
220 card->owner = THIS_MODULE;
221 card->dai_link = binder;
222 card->num_links = 1;
223 card->fully_routed = true;
224 if (hda_codec_is_display(codec))
225 card->late_probe = avs_card_late_probe;
226
227 return devm_snd_soc_register_deferrable_card(dev, card);
228 }
229
230 static const struct platform_device_id avs_hdaudio_driver_ids[] = {
231 {
232 .name = "avs_hdaudio",
233 },
234 {},
235 };
236 MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids);
237
238 static struct platform_driver avs_hdaudio_driver = {
239 .probe = avs_hdaudio_probe,
240 .driver = {
241 .name = "avs_hdaudio",
242 .pm = &snd_soc_pm_ops,
243 },
244 .id_table = avs_hdaudio_driver_ids,
245 };
246
247 module_platform_driver(avs_hdaudio_driver)
248
249 MODULE_DESCRIPTION("Intel HD-Audio machine driver");
250 MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
251 MODULE_LICENSE("GPL");
252