1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
4//
5// Author: Cezary Rojewski <cezary.rojewski@intel.com>
6//
7
8#include <linux/module.h>
9#include <linux/pm_runtime.h>
10#include <sound/soc.h>
11#include <sound/hdaudio_ext.h>
12#include <sound/hda_i915.h>
13#include <sound/hda_codec.h>
14#include "hda.h"
15
16static int hda_codec_create_dais(struct hda_codec *codec, int pcm_count,
17				 struct snd_soc_dai_driver **drivers)
18{
19	struct device *dev = &codec->core.dev;
20	struct snd_soc_dai_driver *drvs;
21	struct hda_pcm *pcm;
22	int i;
23
24	drvs = devm_kcalloc(dev, pcm_count, sizeof(*drvs), GFP_KERNEL);
25	if (!drvs)
26		return -ENOMEM;
27
28	pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list);
29
30	for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) {
31		struct snd_soc_pcm_stream *stream;
32		int dir;
33
34		dev_info(dev, "creating for %s %d\n", pcm->name, i);
35		drvs[i].id = i;
36		drvs[i].name = pcm->name;
37		drvs[i].ops = &snd_soc_hda_codec_dai_ops;
38
39		dir = SNDRV_PCM_STREAM_PLAYBACK;
40		stream = &drvs[i].playback;
41		if (!pcm->stream[dir].substreams) {
42			dev_info(dev, "skipping playback dai for %s\n", pcm->name);
43			goto capture_dais;
44		}
45
46		stream->stream_name =
47			devm_kasprintf(dev, GFP_KERNEL, "%s %s", pcm->name,
48				       snd_pcm_direction_name(dir));
49		if (!stream->stream_name)
50			return -ENOMEM;
51		stream->channels_min = pcm->stream[dir].channels_min;
52		stream->channels_max = pcm->stream[dir].channels_max;
53		stream->rates = pcm->stream[dir].rates;
54		stream->formats = pcm->stream[dir].formats;
55		stream->subformats = pcm->stream[dir].subformats;
56		stream->sig_bits = pcm->stream[dir].maxbps;
57
58capture_dais:
59		dir = SNDRV_PCM_STREAM_CAPTURE;
60		stream = &drvs[i].capture;
61		if (!pcm->stream[dir].substreams) {
62			dev_info(dev, "skipping capture dai for %s\n", pcm->name);
63			continue;
64		}
65
66		stream->stream_name =
67			devm_kasprintf(dev, GFP_KERNEL, "%s %s", pcm->name,
68				       snd_pcm_direction_name(dir));
69		if (!stream->stream_name)
70			return -ENOMEM;
71		stream->channels_min = pcm->stream[dir].channels_min;
72		stream->channels_max = pcm->stream[dir].channels_max;
73		stream->rates = pcm->stream[dir].rates;
74		stream->formats = pcm->stream[dir].formats;
75		stream->subformats = pcm->stream[dir].subformats;
76		stream->sig_bits = pcm->stream[dir].maxbps;
77	}
78
79	*drivers = drvs;
80	return 0;
81}
82
83static int hda_codec_register_dais(struct hda_codec *codec, struct snd_soc_component *component)
84{
85	struct snd_soc_dai_driver *drvs = NULL;
86	struct snd_soc_dapm_context *dapm;
87	struct hda_pcm *pcm;
88	int ret, pcm_count = 0;
89
90	if (list_empty(&codec->pcm_list_head))
91		return -EINVAL;
92	list_for_each_entry(pcm, &codec->pcm_list_head, list)
93		pcm_count++;
94
95	ret = hda_codec_create_dais(codec, pcm_count, &drvs);
96	if (ret < 0)
97		return ret;
98
99	dapm = snd_soc_component_get_dapm(component);
100
101	list_for_each_entry(pcm, &codec->pcm_list_head, list) {
102		struct snd_soc_dai *dai;
103
104		dai = snd_soc_register_dai(component, drvs, false);
105		if (!dai) {
106			dev_err(component->dev, "register dai for %s failed\n", pcm->name);
107			return -EINVAL;
108		}
109
110		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
111		if (ret < 0) {
112			dev_err(component->dev, "create widgets failed: %d\n", ret);
113			snd_soc_unregister_dai(dai);
114			return ret;
115		}
116
117		snd_soc_dai_init_dma_data(dai, &pcm->stream[0], &pcm->stream[1]);
118		drvs++;
119	}
120
121	return 0;
122}
123
124static void hda_codec_unregister_dais(struct hda_codec *codec,
125				      struct snd_soc_component *component)
126{
127	struct snd_soc_dai *dai, *save;
128	struct hda_pcm *pcm;
129
130	for_each_component_dais_safe(component, dai, save) {
131		int stream;
132
133		list_for_each_entry(pcm, &codec->pcm_list_head, list) {
134			if (strcmp(dai->driver->name, pcm->name))
135				continue;
136
137			for_each_pcm_streams(stream)
138				snd_soc_dapm_free_widget(snd_soc_dai_get_widget(dai, stream));
139
140			snd_soc_unregister_dai(dai);
141			break;
142		}
143	}
144}
145
146int hda_codec_probe_complete(struct hda_codec *codec)
147{
148	struct hdac_device *hdev = &codec->core;
149	struct hdac_bus *bus = hdev->bus;
150	int ret;
151
152	ret = snd_hda_codec_build_controls(codec);
153	if (ret < 0) {
154		dev_err(&hdev->dev, "unable to create controls %d\n", ret);
155		goto out;
156	}
157
158	/* Bus suspended codecs as it does not manage their pm */
159	pm_runtime_set_active(&hdev->dev);
160	/* rpm was forbidden in snd_hda_codec_device_new() */
161	snd_hda_codec_set_power_save(codec, 2000);
162	snd_hda_codec_register(codec);
163out:
164	/* Complement pm_runtime_get_sync(bus) in probe */
165	pm_runtime_mark_last_busy(bus->dev);
166	pm_runtime_put_autosuspend(bus->dev);
167
168	return ret;
169}
170EXPORT_SYMBOL_GPL(hda_codec_probe_complete);
171
172/* Expects codec with usage_count=1 and status=suspended */
173static int hda_codec_probe(struct snd_soc_component *component)
174{
175	struct hda_codec *codec = dev_to_hda_codec(component->dev);
176	struct hdac_device *hdev = &codec->core;
177	struct hdac_bus *bus = hdev->bus;
178	struct hdac_ext_link *hlink;
179	hda_codec_patch_t patch;
180	int ret;
181
182#ifdef CONFIG_PM
183	WARN_ON(atomic_read(&hdev->dev.power.usage_count) != 1 ||
184		!pm_runtime_status_suspended(&hdev->dev));
185#endif
186
187	hlink = snd_hdac_ext_bus_get_hlink_by_addr(bus, hdev->addr);
188	if (!hlink) {
189		dev_err(&hdev->dev, "hdac link not found\n");
190		return -EIO;
191	}
192
193	pm_runtime_get_sync(bus->dev);
194	if (hda_codec_is_display(codec))
195		snd_hdac_display_power(bus, hdev->addr, true);
196	snd_hdac_ext_bus_link_get(bus, hlink);
197
198	ret = snd_hda_codec_device_new(codec->bus, component->card->snd_card, hdev->addr, codec,
199				       false);
200	if (ret < 0) {
201		dev_err(&hdev->dev, "codec create failed: %d\n", ret);
202		goto device_new_err;
203	}
204
205	ret = snd_hda_codec_set_name(codec, codec->preset->name);
206	if (ret < 0) {
207		dev_err(&hdev->dev, "set name: %s failed: %d\n", codec->preset->name, ret);
208		goto err;
209	}
210
211	ret = snd_hdac_regmap_init(&codec->core);
212	if (ret < 0) {
213		dev_err(&hdev->dev, "regmap init failed: %d\n", ret);
214		goto err;
215	}
216
217	patch = (hda_codec_patch_t)codec->preset->driver_data;
218	if (!patch) {
219		dev_err(&hdev->dev, "no patch specified\n");
220		ret = -EINVAL;
221		goto err;
222	}
223
224	ret = patch(codec);
225	if (ret < 0) {
226		dev_err(&hdev->dev, "codec init failed: %d\n", ret);
227		goto err;
228	}
229
230	ret = snd_hda_codec_parse_pcms(codec);
231	if (ret < 0) {
232		dev_err(&hdev->dev, "unable to map pcms to dai: %d\n", ret);
233		goto parse_pcms_err;
234	}
235
236	ret = hda_codec_register_dais(codec, component);
237	if (ret < 0) {
238		dev_err(&hdev->dev, "update dais failed: %d\n", ret);
239		goto parse_pcms_err;
240	}
241
242	if (!hda_codec_is_display(codec)) {
243		ret = hda_codec_probe_complete(codec);
244		if (ret < 0)
245			goto complete_err;
246	}
247
248	codec->core.lazy_cache = true;
249
250	return 0;
251
252complete_err:
253	hda_codec_unregister_dais(codec, component);
254parse_pcms_err:
255	if (codec->patch_ops.free)
256		codec->patch_ops.free(codec);
257err:
258	snd_hda_codec_cleanup_for_unbind(codec);
259device_new_err:
260	if (hda_codec_is_display(codec))
261		snd_hdac_display_power(bus, hdev->addr, false);
262
263	snd_hdac_ext_bus_link_put(bus, hlink);
264
265	pm_runtime_mark_last_busy(bus->dev);
266	pm_runtime_put_autosuspend(bus->dev);
267	return ret;
268}
269
270/* Leaves codec with usage_count=1 and status=suspended */
271static void hda_codec_remove(struct snd_soc_component *component)
272{
273	struct hda_codec *codec = dev_to_hda_codec(component->dev);
274	struct hdac_device *hdev = &codec->core;
275	struct hdac_bus *bus = hdev->bus;
276	struct hdac_ext_link *hlink;
277	bool was_registered = codec->core.registered;
278
279	/* Don't allow any more runtime suspends */
280	pm_runtime_forbid(&hdev->dev);
281
282	hda_codec_unregister_dais(codec, component);
283
284	if (codec->patch_ops.free)
285		codec->patch_ops.free(codec);
286
287	snd_hda_codec_cleanup_for_unbind(codec);
288	pm_runtime_put_noidle(&hdev->dev);
289	/* snd_hdac_device_exit() is only called on bus remove */
290	pm_runtime_set_suspended(&hdev->dev);
291
292	if (hda_codec_is_display(codec))
293		snd_hdac_display_power(bus, hdev->addr, false);
294
295	hlink = snd_hdac_ext_bus_get_hlink_by_addr(bus, hdev->addr);
296	if (hlink)
297		snd_hdac_ext_bus_link_put(bus, hlink);
298	/*
299	 * HDMI card's hda_codec_probe_complete() (see late_probe()) may
300	 * not be called due to early error, leaving bus uc unbalanced
301	 */
302	if (!was_registered) {
303		pm_runtime_mark_last_busy(bus->dev);
304		pm_runtime_put_autosuspend(bus->dev);
305	}
306
307#ifdef CONFIG_PM
308	WARN_ON(atomic_read(&hdev->dev.power.usage_count) != 1 ||
309		!pm_runtime_status_suspended(&hdev->dev));
310#endif
311}
312
313static const struct snd_soc_dapm_route hda_dapm_routes[] = {
314	{"AIF1TX", NULL, "Codec Input Pin1"},
315	{"AIF2TX", NULL, "Codec Input Pin2"},
316	{"AIF3TX", NULL, "Codec Input Pin3"},
317
318	{"Codec Output Pin1", NULL, "AIF1RX"},
319	{"Codec Output Pin2", NULL, "AIF2RX"},
320	{"Codec Output Pin3", NULL, "AIF3RX"},
321};
322
323static const struct snd_soc_dapm_widget hda_dapm_widgets[] = {
324	/* Audio Interface */
325	SND_SOC_DAPM_AIF_IN("AIF1RX", "Analog Codec Playback", 0, SND_SOC_NOPM, 0, 0),
326	SND_SOC_DAPM_AIF_IN("AIF2RX", "Digital Codec Playback", 0, SND_SOC_NOPM, 0, 0),
327	SND_SOC_DAPM_AIF_IN("AIF3RX", "Alt Analog Codec Playback", 0, SND_SOC_NOPM, 0, 0),
328	SND_SOC_DAPM_AIF_OUT("AIF1TX", "Analog Codec Capture", 0, SND_SOC_NOPM, 0, 0),
329	SND_SOC_DAPM_AIF_OUT("AIF2TX", "Digital Codec Capture", 0, SND_SOC_NOPM, 0, 0),
330	SND_SOC_DAPM_AIF_OUT("AIF3TX", "Alt Analog Codec Capture", 0, SND_SOC_NOPM, 0, 0),
331
332	/* Input Pins */
333	SND_SOC_DAPM_INPUT("Codec Input Pin1"),
334	SND_SOC_DAPM_INPUT("Codec Input Pin2"),
335	SND_SOC_DAPM_INPUT("Codec Input Pin3"),
336
337	/* Output Pins */
338	SND_SOC_DAPM_OUTPUT("Codec Output Pin1"),
339	SND_SOC_DAPM_OUTPUT("Codec Output Pin2"),
340	SND_SOC_DAPM_OUTPUT("Codec Output Pin3"),
341};
342
343static struct snd_soc_dai_driver card_binder_dai = {
344	.id = -1,
345	.name = "codec-probing-DAI",
346};
347
348static int hda_hdev_attach(struct hdac_device *hdev)
349{
350	struct hda_codec *codec = dev_to_hda_codec(&hdev->dev);
351	struct snd_soc_component_driver *comp_drv;
352
353	if (hda_codec_is_display(codec) && !hdev->bus->audio_component) {
354		dev_dbg(&hdev->dev, "no i915, skip registration for 0x%08x\n", hdev->vendor_id);
355		return -ENODEV;
356	}
357
358	comp_drv = devm_kzalloc(&hdev->dev, sizeof(*comp_drv), GFP_KERNEL);
359	if (!comp_drv)
360		return -ENOMEM;
361
362	/*
363	 * It's save to rely on dev_name() rather than a copy as component
364	 * driver's lifetime is directly tied to hda codec one
365	 */
366	comp_drv->name = dev_name(&hdev->dev);
367	comp_drv->probe = hda_codec_probe;
368	comp_drv->remove = hda_codec_remove;
369	comp_drv->idle_bias_on = false;
370	if (!hda_codec_is_display(codec)) {
371		comp_drv->dapm_widgets = hda_dapm_widgets;
372		comp_drv->num_dapm_widgets = ARRAY_SIZE(hda_dapm_widgets);
373		comp_drv->dapm_routes = hda_dapm_routes;
374		comp_drv->num_dapm_routes = ARRAY_SIZE(hda_dapm_routes);
375	}
376
377	return snd_soc_register_component(&hdev->dev, comp_drv, &card_binder_dai, 1);
378}
379
380static int hda_hdev_detach(struct hdac_device *hdev)
381{
382	struct hda_codec *codec = dev_to_hda_codec(&hdev->dev);
383
384	if (codec->core.registered)
385		cancel_delayed_work_sync(&codec->jackpoll_work);
386
387	snd_soc_unregister_component(&hdev->dev);
388
389	return 0;
390}
391
392const struct hdac_ext_bus_ops soc_hda_ext_bus_ops = {
393	.hdev_attach = hda_hdev_attach,
394	.hdev_detach = hda_hdev_detach,
395};
396EXPORT_SYMBOL_GPL(soc_hda_ext_bus_ops);
397
398MODULE_DESCRIPTION("HD-Audio codec driver");
399MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
400MODULE_LICENSE("GPL");
401