source: GPL/trunk/alsa-kernel/pci/hda/hda_bind.c

Last change on this file was 772, checked in by David Azarewicz, 7 months ago

Merge in changes from 6.6-LTS branch.
Fixed additional 25+ problems.
File size: 8.7 KB
Line 
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HD-audio codec driver binding
4 * Copyright (c) Takashi Iwai <tiwai@suse.de>
5 */
6
7#include <linux/init.h>
8#include <linux/slab.h>
9#include <linux/mutex.h>
10#include <linux/module.h>
11#include <linux/export.h>
12#include <linux/pm.h>
13#include <sound/core.h>
14#include <sound/hda_codec.h>
15#include "hda_local.h"
16#include "hda_jack.h"
17
18#pragma disable_message (201)
19
20/*
21 * find a matching codec id
22 */
23static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
24{
25 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
26 struct hda_codec_driver *driver =
27 container_of(drv, struct hda_codec_driver, core);
28 const struct hda_device_id *list;
29 /* check probe_id instead of vendor_id if set */
30 u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
31 u32 rev_id = codec->core.revision_id;
32
33 for (list = driver->id; list->vendor_id; list++) {
34 if (list->vendor_id == id &&
35 (!list->rev_id || list->rev_id == rev_id)) {
36 codec->preset = list;
37 return 1;
38 }
39 }
40
41 return 0;
42}
43
44/* process an unsolicited event */
45static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
46{
47 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
48
49 /* ignore unsol events during shutdown */
50 if (codec->bus->shutdown)
51 return;
52#ifndef TARGET_OS2
53 /* ignore unsol events during system suspend/resume */
54 if (codec->core.dev.power.power_state.event != PM_EVENT_ON)
55 return;
56#endif
57 if (codec->patch_ops.unsol_event)
58 codec->patch_ops.unsol_event(codec, ev);
59}
60
61/**
62 * snd_hda_codec_set_name - set the codec name
63 * @codec: the HDA codec
64 * @name: name string to set
65 */
66int snd_hda_codec_set_name(struct hda_codec *codec, const char *name)
67{
68 int err;
69
70 if (!name)
71 return 0;
72 err = snd_hdac_device_set_chip_name(&codec->core, name);
73 if (err < 0)
74 return err;
75
76 /* update the mixer name */
77 if (!*codec->card->mixername ||
78 codec->bus->mixer_assigned >= codec->core.addr) {
79 snprintf(codec->card->mixername,
80 sizeof(codec->card->mixername), "%s %s",
81 codec->core.vendor_name, codec->core.chip_name);
82 codec->bus->mixer_assigned = codec->core.addr;
83 }
84 return 0;
85}
86EXPORT_SYMBOL_GPL(snd_hda_codec_set_name);
87
88static int hda_codec_driver_probe(struct device *dev)
89{
90 struct hda_codec *codec = dev_to_hda_codec(dev);
91 struct module *owner = dev->driver->owner;
92 hda_codec_patch_t patch;
93 int err;
94
95 if (codec->bus->core.ext_ops) {
96 if (WARN_ON(!codec->bus->core.ext_ops->hdev_attach))
97 return -EINVAL;
98 return codec->bus->core.ext_ops->hdev_attach(&codec->core);
99 }
100
101 if (WARN_ON(!codec->preset))
102 return -EINVAL;
103
104 err = snd_hda_codec_set_name(codec, codec->preset->name);
105 if (err < 0)
106 goto error;
107 err = snd_hdac_regmap_init(&codec->core);
108 if (err < 0)
109 goto error;
110
111 if (!try_module_get(owner)) {
112 err = -EINVAL;
113 goto error;
114 }
115
116 patch = (hda_codec_patch_t)codec->preset->driver_data;
117 if (patch) {
118 err = patch(codec);
119 if (err < 0)
120 goto error_module_put;
121 }
122
123 err = snd_hda_codec_build_pcms(codec);
124 if (err < 0)
125 goto error_module;
126 err = snd_hda_codec_build_controls(codec);
127 if (err < 0)
128 goto error_module;
129 /* only register after the bus probe finished; otherwise it's racy */
130 if (!codec->bus->bus_probing && codec->card->registered) {
131 err = snd_card_register(codec->card);
132 if (err < 0)
133 goto error_module;
134 snd_hda_codec_register(codec);
135 }
136
137 codec->core.lazy_cache = true;
138 return 0;
139
140 error_module:
141 if (codec->patch_ops.free)
142 codec->patch_ops.free(codec);
143 error_module_put:
144 module_put(owner);
145
146 error:
147 snd_hda_codec_cleanup_for_unbind(codec);
148 codec->preset = NULL;
149 return err;
150}
151
152static int hda_codec_driver_remove(struct device *dev)
153{
154 struct hda_codec *codec = dev_to_hda_codec(dev);
155
156 if (codec->bus->core.ext_ops) {
157 if (WARN_ON(!codec->bus->core.ext_ops->hdev_detach))
158 return -EINVAL;
159 return codec->bus->core.ext_ops->hdev_detach(&codec->core);
160 }
161
162 snd_hda_codec_disconnect_pcms(codec);
163 snd_hda_jack_tbl_disconnect(codec);
164 if (!refcount_dec_and_test(&codec->pcm_ref))
165 wait_event(codec->remove_sleep, !refcount_read(&codec->pcm_ref));
166 snd_power_sync_ref(codec->bus->card);
167
168 if (codec->patch_ops.free)
169 codec->patch_ops.free(codec);
170 snd_hda_codec_cleanup_for_unbind(codec);
171 codec->preset = NULL;
172 module_put(dev->driver->owner);
173 return 0;
174}
175
176static void hda_codec_driver_shutdown(struct device *dev)
177{
178 snd_hda_codec_shutdown(dev_to_hda_codec(dev));
179}
180
181int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
182 struct module *owner)
183{
184 drv->core.driver.name = name;
185 drv->core.driver.owner = owner;
186 drv->core.driver.bus = &snd_hda_bus_type;
187 drv->core.driver.probe = hda_codec_driver_probe;
188 drv->core.driver.remove = hda_codec_driver_remove;
189 drv->core.driver.shutdown = hda_codec_driver_shutdown;
190 drv->core.driver.pm = &hda_codec_driver_pm;
191 drv->core.type = HDA_DEV_LEGACY;
192 drv->core.match = hda_codec_match;
193 drv->core.unsol_event = hda_codec_unsol_event;
194 return driver_register(&drv->core.driver);
195}
196EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
197
198void hda_codec_driver_unregister(struct hda_codec_driver *drv)
199{
200 driver_unregister(&drv->core.driver);
201}
202EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
203
204static inline bool codec_probed(struct hda_codec *codec)
205{
206 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
207}
208
209/* try to auto-load codec module */
210static void request_codec_module(struct hda_codec *codec)
211{
212#ifdef MODULE
213 char modalias[32];
214 const char *mod = NULL;
215
216 switch (codec->probe_id) {
217 case HDA_CODEC_ID_GENERIC_HDMI:
218#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI) || defined(CONFIG_SND_HDA_CODEC_HDMI)
219 mod = "snd-hda-codec-hdmi";
220#endif
221 break;
222 case HDA_CODEC_ID_GENERIC:
223#if IS_MODULE(CONFIG_SND_HDA_GENERIC) || defined(CONFIG_SND_HDA_GENERIC)
224 mod = "snd-hda-codec-generic";
225#endif
226 break;
227 default:
228 snd_hdac_codec_modalias(&codec->core, modalias, sizeof(modalias));
229 mod = modalias;
230 break;
231 }
232
233#ifndef TARGET_OS2
234 if (mod)
235 request_module(mod);
236#endif
237#endif /* MODULE */
238}
239
240/* try to auto-load and bind the codec module */
241static void codec_bind_module(struct hda_codec *codec)
242{
243//#ifdef MODULE
244 request_codec_module(codec);
245 if (codec_probed(codec))
246 return;
247//#endif
248}
249
250#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || defined(CONFIG_SND_HDA_CODEC_HDMI)
251/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
252static bool is_likely_hdmi_codec(struct hda_codec *codec)
253{
254 hda_nid_t nid;
255
256 /*
257 * For ASoC users, if snd_hda_hdmi_codec module is denylisted and any
258 * event causes i915 enumeration to fail, ->wcaps remains uninitialized.
259 */
260 if (!codec->wcaps)
261 return true;
262
263 for_each_hda_codec_node(nid, codec) {
264 unsigned int wcaps = get_wcaps(codec, nid);
265 switch (get_wcaps_type(wcaps)) {
266 case AC_WID_AUD_IN:
267 return false; /* HDMI parser supports only HDMI out */
268 case AC_WID_AUD_OUT:
269 if (!(wcaps & AC_WCAP_DIGITAL))
270 return false;
271 break;
272 }
273 }
274 return true;
275}
276#else
277/* no HDMI codec parser support */
278#define is_likely_hdmi_codec(codec) false
279#endif /* CONFIG_SND_HDA_CODEC_HDMI */
280
281static int codec_bind_generic(struct hda_codec *codec)
282{
283 if (codec->probe_id)
284 return -ENODEV;
285
286 if (is_likely_hdmi_codec(codec)) {
287 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
288 request_codec_module(codec);
289 if (codec_probed(codec))
290 return 0;
291 }
292
293 codec->probe_id = HDA_CODEC_ID_GENERIC;
294 request_codec_module(codec);
295 if (codec_probed(codec))
296 return 0;
297 return -ENODEV;
298}
299
300#if IS_ENABLED(CONFIG_SND_HDA_GENERIC) || defined(CONFIG_SND_HDA_GENERIC)
301#define is_generic_config(codec) \
302 (codec->modelname && !strcmp(codec->modelname, "generic"))
303#else
304#define is_generic_config(codec) 0
305#endif
306
307/**
308 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
309 * @codec: the HDA codec
310 *
311 * Start parsing of the given codec tree and (re-)initialize the whole
312 * patch instance.
313 *
314 * Returns 0 if successful or a negative error code.
315 */
316int snd_hda_codec_configure(struct hda_codec *codec)
317{
318 int err;
319
320 if (codec->configured)
321 return 0;
322
323 if (is_generic_config(codec))
324 codec->probe_id = HDA_CODEC_ID_GENERIC;
325 else
326 codec->probe_id = 0;
327
328 if (!device_is_registered(&codec->core.dev)) {
329 err = snd_hdac_device_register(&codec->core);
330 if (err < 0)
331 return err;
332 }
333
334 if (!codec->preset)
335 codec_bind_module(codec);
336 if (!codec->preset) {
337 err = codec_bind_generic(codec);
338 if (err < 0) {
339 codec_dbg(codec, "Unable to bind the codec - err = %d\n",err);
340 return err;
341 }
342 }
343
344 codec->configured = 1;
345 return 0;
346}
347EXPORT_SYMBOL_GPL(snd_hda_codec_configure);
Note: See TracBrowser for help on using the repository browser.