1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* HD-audio codec driver binding
* Copyright (c) Takashi Iwai <tiwai@suse.de>
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include <sound/hda_codec.h>
#include "hda_local.h"
#include "hda_jack.h"
/*
* find a matching codec id
*/
static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
{
struct hda_codec *codec = container_of(dev, struct hda_codec, core);
struct hda_codec_driver *driver =
container_of(drv, struct hda_codec_driver, core);
const struct hda_device_id *list;
/* check probe_id instead of vendor_id if set */
u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
u32 rev_id = codec->core.revision_id;
for (list = driver->id; list->vendor_id; list++) {
if (list->vendor_id == id &&
(!list->rev_id || list->rev_id == rev_id)) {
codec->preset = list;
return 1;
}
}
return 0;
}
/* process an unsolicited event */
static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
{
struct hda_codec *codec = container_of(dev, struct hda_codec, core);
/* ignore unsol events during shutdown */
if (codec->bus->shutdown)
return;
/* ignore unsol events during system suspend/resume */
if (codec->core.dev.power.power_state.event != PM_EVENT_ON)
return;
if (codec->patch_ops.unsol_event)
codec->patch_ops.unsol_event(codec, ev);
}
/**
* snd_hda_codec_set_name - set the codec name
* @codec: the HDA codec
* @name: name string to set
*/
int snd_hda_codec_set_name(struct hda_codec *codec, const char *name)
{
int err;
if (!name)
return 0;
err = snd_hdac_device_set_chip_name(&codec->core, name);
if (err < 0)
return err;
/* update the mixer name */
if (!*codec->card->mixername ||
codec->bus->mixer_assigned >= codec->core.addr) {
snprintf(codec->card->mixername,
sizeof(codec->card->mixername), "%s %s",
codec->core.vendor_name, codec->core.chip_name);
codec->bus->mixer_assigned = codec->core.addr;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_set_name);
static int hda_codec_driver_probe(struct device *dev)
{
struct hda_codec *codec = dev_to_hda_codec(dev);
struct module *owner = dev->driver->owner;
hda_codec_patch_t patch;
int err;
if (codec->bus->core.ext_ops) {
if (WARN_ON(!codec->bus->core.ext_ops->hdev_attach))
return -EINVAL;
return codec->bus->core.ext_ops->hdev_attach(&codec->core);
}
if (WARN_ON(!codec->preset))
return -EINVAL;
err = snd_hda_codec_set_name(codec, codec->preset->name);
if (err < 0)
goto error;
err = snd_hdac_regmap_init(&codec->core);
if (err < 0)
goto error;
if (!try_module_get(owner)) {
err = -EINVAL;
goto error;
}
patch = (hda_codec_patch_t)codec->preset->driver_data;
if (patch) {
err = patch(codec);
if (err < 0)
goto error_module_put;
}
err = snd_hda_codec_build_pcms(codec);
if (err < 0)
goto error_module;
err = snd_hda_codec_build_controls(codec);
if (err < 0)
goto error_module;
/* only register after the bus probe finished; otherwise it's racy */
if (!codec->bus->bus_probing && codec->card->registered) {
err = snd_card_register(codec->card);
if (err < 0)
goto error_module;
snd_hda_codec_register(codec);
}
codec->core.lazy_cache = true;
return 0;
error_module:
if (codec->patch_ops.free)
codec->patch_ops.free(codec);
error_module_put:
module_put(owner);
error:
snd_hda_codec_cleanup_for_unbind(codec);
return err;
}
static int hda_codec_driver_remove(struct device *dev)
{
struct hda_codec *codec = dev_to_hda_codec(dev);
if (codec->bus->core.ext_ops) {
if (WARN_ON(!codec->bus->core.ext_ops->hdev_detach))
return -EINVAL;
return codec->bus->core.ext_ops->hdev_detach(&codec->core);
}
snd_hda_codec_disconnect_pcms(codec);
snd_hda_jack_tbl_disconnect(codec);
if (!refcount_dec_and_test(&codec->pcm_ref))
wait_event(codec->remove_sleep, !refcount_read(&codec->pcm_ref));
snd_power_sync_ref(codec->bus->card);
if (codec->patch_ops.free)
codec->patch_ops.free(codec);
snd_hda_codec_cleanup_for_unbind(codec);
module_put(dev->driver->owner);
return 0;
}
static void hda_codec_driver_shutdown(struct device *dev)
{
snd_hda_codec_shutdown(dev_to_hda_codec(dev));
}
int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
struct module *owner)
{
drv->core.driver.name = name;
drv->core.driver.owner = owner;
drv->core.driver.bus = &snd_hda_bus_type;
drv->core.driver.probe = hda_codec_driver_probe;
drv->core.driver.remove = hda_codec_driver_remove;
drv->core.driver.shutdown = hda_codec_driver_shutdown;
drv->core.driver.pm = &hda_codec_driver_pm;
drv->core.type = HDA_DEV_LEGACY;
drv->core.match = hda_codec_match;
drv->core.unsol_event = hda_codec_unsol_event;
return driver_register(&drv->core.driver);
}
EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
void hda_codec_driver_unregister(struct hda_codec_driver *drv)
{
driver_unregister(&drv->core.driver);
}
EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
static inline bool codec_probed(struct hda_codec *codec)
{
return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
}
/* try to auto-load codec module */
static void request_codec_module(struct hda_codec *codec)
{
#ifdef MODULE
char modalias[32];
const char *mod = NULL;
switch (codec->probe_id) {
case HDA_CODEC_ID_GENERIC_HDMI:
#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
mod = "snd-hda-codec-hdmi";
#endif
break;
case HDA_CODEC_ID_GENERIC:
#if IS_MODULE(CONFIG_SND_HDA_GENERIC)
mod = "snd-hda-codec-generic";
#endif
break;
default:
snd_hdac_codec_modalias(&codec->core, modalias, sizeof(modalias));
mod = modalias;
break;
}
if (mod)
request_module(mod);
#endif /* MODULE */
}
/* try to auto-load and bind the codec module */
static void codec_bind_module(struct hda_codec *codec)
{
#ifdef MODULE
request_codec_module(codec);
if (codec_probed(codec))
return;
#endif
}
#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
static bool is_likely_hdmi_codec(struct hda_codec *codec)
{
hda_nid_t nid;
/*
* For ASoC users, if snd_hda_hdmi_codec module is denylisted and any
* event causes i915 enumeration to fail, ->wcaps remains uninitialized.
*/
if (!codec->wcaps)
return true;
for_each_hda_codec_node(nid, codec) {
unsigned int wcaps = get_wcaps(codec, nid);
switch (get_wcaps_type(wcaps)) {
case AC_WID_AUD_IN:
return false; /* HDMI parser supports only HDMI out */
case AC_WID_AUD_OUT:
if (!(wcaps & AC_WCAP_DIGITAL))
return false;
break;
}
}
return true;
}
#else
/* no HDMI codec parser support */
#define is_likely_hdmi_codec(codec) false
#endif /* CONFIG_SND_HDA_CODEC_HDMI */
static int codec_bind_generic(struct hda_codec *codec)
{
if (codec->probe_id)
return -ENODEV;
if (is_likely_hdmi_codec(codec)) {
codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
request_codec_module(codec);
if (codec_probed(codec))
return 0;
}
codec->probe_id = HDA_CODEC_ID_GENERIC;
request_codec_module(codec);
if (codec_probed(codec))
return 0;
return -ENODEV;
}
#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
#define is_generic_config(codec) \
(codec->modelname && !strcmp(codec->modelname, "generic"))
#else
#define is_generic_config(codec) 0
#endif
/**
* snd_hda_codec_configure - (Re-)configure the HD-audio codec
* @codec: the HDA codec
*
* Start parsing of the given codec tree and (re-)initialize the whole
* patch instance.
*
* Returns 0 if successful or a negative error code.
*/
int snd_hda_codec_configure(struct hda_codec *codec)
{
int err;
if (codec->configured)
return 0;
if (is_generic_config(codec))
codec->probe_id = HDA_CODEC_ID_GENERIC;
else
codec->probe_id = 0;
if (!device_is_registered(&codec->core.dev)) {
err = snd_hdac_device_register(&codec->core);
if (err < 0)
return err;
}
if (!codec->preset)
codec_bind_module(codec);
if (!codec->preset) {
err = codec_bind_generic(codec);
if (err < 0) {
codec_dbg(codec, "Unable to bind the codec\n");
return err;
}
}
codec->configured = 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
|
