hdaudio.c

  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
 18static int avs_create_dai_links(struct device *dev, struct hda_codec *codec, int pcm_count,
 19				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 = dev_name(dev);
 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
 72static struct snd_pcm *
 73avs_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
 96static 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
126static 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, &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
160static 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
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 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 = dev_name(dev);
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 = devm_kasprintf(dev, GFP_KERNEL, "hdaudioB%dD%d", codec->bus->core.idx,
211					    codec->core.addr);
212		if (!card->name)
213			return -ENOMEM;
214	} else {
215		card->driver_name = "avs_hdaudio";
216		if (hda_codec_is_display(codec))
217			card->long_name = card->name = "AVS HDMI";
218		else
219			card->long_name = card->name = "AVS HD-Audio";
220	}
221
222	card->dev = dev;
223	card->owner = THIS_MODULE;
224	card->dai_link = binder;
225	card->num_links = 1;
226	card->fully_routed = true;
227	if (hda_codec_is_display(codec))
228		card->late_probe = avs_card_late_probe;
229
230	return devm_snd_soc_register_deferrable_card(dev, card);
231}
232
233static const struct platform_device_id avs_hdaudio_driver_ids[] = {
234	{
235		.name = "avs_hdaudio",
236	},
237	{},
238};
239MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids);
240
241static struct platform_driver avs_hdaudio_driver = {
242	.probe = avs_hdaudio_probe,
243	.driver = {
244		.name = "avs_hdaudio",
245		.pm = &snd_soc_pm_ops,
246	},
247	.id_table = avs_hdaudio_driver_ids,
248};
249
250module_platform_driver(avs_hdaudio_driver)
251
252MODULE_DESCRIPTION("Intel HD-Audio machine driver");
253MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
254MODULE_LICENSE("GPL");