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
17static 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
73static struct snd_pcm *
74avs_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
97static 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
126static 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
158static 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
170static 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(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
219static const struct platform_device_id avs_hdaudio_driver_ids[] = {
220	{
221		.name = "avs_hdaudio",
222	},
223	{},
224};
225MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids);
226
227static 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
236module_platform_driver(avs_hdaudio_driver)
237
238MODULE_DESCRIPTION("Intel HD-Audio machine driver");
239MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
240MODULE_LICENSE("GPL");
241