xref: /openbmc/linux/sound/soc/intel/avs/boards/hdaudio.c (revision c04efbfd)
1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
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 
avs_create_dai_links(struct device * dev,struct hda_codec * codec,int pcm_count,const char * platform_name,struct snd_soc_dai_link ** links)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(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 *
avs_card_hdmi_pcm_at(struct snd_soc_card * card,int hdmi_idx)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 
avs_card_late_probe(struct snd_soc_card * card)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 
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 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 SND_SOC_DAILINK_DEF(dummy, DAILINK_COMP_ARRAY(COMP_DUMMY()));
159 
160 static struct snd_soc_dai_link probing_link = {
161 	.name = "probing-LINK",
162 	.id = -1,
163 	.nonatomic = 1,
164 	.no_pcm = 1,
165 	.dpcm_playback = 1,
166 	.dpcm_capture = 1,
167 	.cpus = dummy,
168 	.num_cpus = ARRAY_SIZE(dummy),
169 	.init = avs_probing_link_init,
170 };
171 
avs_hdaudio_probe(struct platform_device * pdev)172 static int avs_hdaudio_probe(struct platform_device *pdev)
173 {
174 	struct snd_soc_dai_link *binder;
175 	struct snd_soc_acpi_mach *mach;
176 	struct snd_soc_card *card;
177 	struct device *dev = &pdev->dev;
178 	struct hda_codec *codec;
179 
180 	mach = dev_get_platdata(dev);
181 	codec = mach->pdata;
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(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 	card->name = binder->codecs->name;
210 	card->dev = dev;
211 	card->owner = THIS_MODULE;
212 	card->dai_link = binder;
213 	card->num_links = 1;
214 	card->fully_routed = true;
215 	if (hda_codec_is_display(codec))
216 		card->late_probe = avs_card_late_probe;
217 
218 	return devm_snd_soc_register_card(dev, card);
219 }
220 
221 static struct platform_driver avs_hdaudio_driver = {
222 	.probe = avs_hdaudio_probe,
223 	.driver = {
224 		.name = "avs_hdaudio",
225 		.pm = &snd_soc_pm_ops,
226 	},
227 };
228 
229 module_platform_driver(avs_hdaudio_driver)
230 
231 MODULE_DESCRIPTION("Intel HD-Audio machine driver");
232 MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
233 MODULE_LICENSE("GPL");
234 MODULE_ALIAS("platform:avs_hdaudio");
235