Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7639a06c TI |
2 | /* |
3 | * HD-audio codec core device | |
4 | */ | |
5 | ||
6 | #include <linux/init.h> | |
09787492 | 7 | #include <linux/delay.h> |
7639a06c TI |
8 | #include <linux/device.h> |
9 | #include <linux/slab.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/export.h> | |
12 | #include <linux/pm_runtime.h> | |
13 | #include <sound/hdaudio.h> | |
01ed3c06 | 14 | #include <sound/hda_regmap.h> |
b7d023e1 | 15 | #include <sound/pcm.h> |
7639a06c TI |
16 | #include "local.h" |
17 | ||
18 | static void setup_fg_nodes(struct hdac_device *codec); | |
19 | static int get_codec_vendor_name(struct hdac_device *codec); | |
20 | ||
21 | static void default_release(struct device *dev) | |
22 | { | |
50f0bf55 | 23 | snd_hdac_device_exit(dev_to_hdac_dev(dev)); |
7639a06c TI |
24 | } |
25 | ||
26 | /** | |
27 | * snd_hdac_device_init - initialize the HD-audio codec base device | |
28 | * @codec: device to initialize | |
29 | * @bus: but to attach | |
30 | * @name: device name string | |
31 | * @addr: codec address | |
32 | * | |
33 | * Returns zero for success or a negative error code. | |
34 | * | |
35 | * This function increments the runtime PM counter and marks it active. | |
36 | * The caller needs to turn it off appropriately later. | |
37 | * | |
38 | * The caller needs to set the device's release op properly by itself. | |
39 | */ | |
40 | int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, | |
41 | const char *name, unsigned int addr) | |
42 | { | |
43 | struct device *dev; | |
44 | hda_nid_t fg; | |
45 | int err; | |
46 | ||
47 | dev = &codec->dev; | |
48 | device_initialize(dev); | |
49 | dev->parent = bus->dev; | |
50 | dev->bus = &snd_hda_bus_type; | |
51 | dev->release = default_release; | |
3256be65 | 52 | dev->groups = hdac_dev_attr_groups; |
7639a06c TI |
53 | dev_set_name(dev, "%s", name); |
54 | device_enable_async_suspend(dev); | |
55 | ||
56 | codec->bus = bus; | |
57 | codec->addr = addr; | |
58 | codec->type = HDA_DEV_CORE; | |
ed180abb | 59 | mutex_init(&codec->widget_lock); |
1a462be5 | 60 | mutex_init(&codec->regmap_lock); |
7639a06c TI |
61 | pm_runtime_set_active(&codec->dev); |
62 | pm_runtime_get_noresume(&codec->dev); | |
63 | atomic_set(&codec->in_pm, 0); | |
64 | ||
246bb4aa TI |
65 | err = snd_hdac_bus_add_device(bus, codec); |
66 | if (err < 0) | |
67 | goto error; | |
68 | ||
7639a06c TI |
69 | /* fill parameters */ |
70 | codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, | |
71 | AC_PAR_VENDOR_ID); | |
72 | if (codec->vendor_id == -1) { | |
73 | /* read again, hopefully the access method was corrected | |
74 | * in the last read... | |
75 | */ | |
76 | codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, | |
77 | AC_PAR_VENDOR_ID); | |
78 | } | |
79 | ||
80 | codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, | |
81 | AC_PAR_SUBSYSTEM_ID); | |
82 | codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, | |
83 | AC_PAR_REV_ID); | |
84 | ||
85 | setup_fg_nodes(codec); | |
86 | if (!codec->afg && !codec->mfg) { | |
87 | dev_err(dev, "no AFG or MFG node found\n"); | |
88 | err = -ENODEV; | |
89 | goto error; | |
90 | } | |
91 | ||
92 | fg = codec->afg ? codec->afg : codec->mfg; | |
93 | ||
774a075a | 94 | err = snd_hdac_refresh_widgets(codec); |
7639a06c TI |
95 | if (err < 0) |
96 | goto error; | |
97 | ||
98 | codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE); | |
99 | /* reread ssid if not set by parameter */ | |
ffda568e | 100 | if (codec->subsystem_id == -1 || codec->subsystem_id == 0) |
7639a06c TI |
101 | snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0, |
102 | &codec->subsystem_id); | |
103 | ||
104 | err = get_codec_vendor_name(codec); | |
105 | if (err < 0) | |
106 | goto error; | |
107 | ||
108 | codec->chip_name = kasprintf(GFP_KERNEL, "ID %x", | |
109 | codec->vendor_id & 0xffff); | |
110 | if (!codec->chip_name) { | |
111 | err = -ENOMEM; | |
112 | goto error; | |
113 | } | |
114 | ||
115 | return 0; | |
116 | ||
117 | error: | |
7639a06c TI |
118 | put_device(&codec->dev); |
119 | return err; | |
120 | } | |
121 | EXPORT_SYMBOL_GPL(snd_hdac_device_init); | |
122 | ||
123 | /** | |
124 | * snd_hdac_device_exit - clean up the HD-audio codec base device | |
125 | * @codec: device to clean up | |
126 | */ | |
127 | void snd_hdac_device_exit(struct hdac_device *codec) | |
128 | { | |
c4c2533f | 129 | pm_runtime_put_noidle(&codec->dev); |
13774d81 RW |
130 | /* keep balance of runtime PM child_count in parent device */ |
131 | pm_runtime_set_suspended(&codec->dev); | |
7639a06c TI |
132 | snd_hdac_bus_remove_device(codec->bus, codec); |
133 | kfree(codec->vendor_name); | |
134 | kfree(codec->chip_name); | |
135 | } | |
136 | EXPORT_SYMBOL_GPL(snd_hdac_device_exit); | |
137 | ||
3256be65 TI |
138 | /** |
139 | * snd_hdac_device_register - register the hd-audio codec base device | |
6e57188f | 140 | * @codec: the device to register |
3256be65 TI |
141 | */ |
142 | int snd_hdac_device_register(struct hdac_device *codec) | |
143 | { | |
144 | int err; | |
145 | ||
146 | err = device_add(&codec->dev); | |
147 | if (err < 0) | |
148 | return err; | |
ed180abb | 149 | mutex_lock(&codec->widget_lock); |
3256be65 | 150 | err = hda_widget_sysfs_init(codec); |
ed180abb | 151 | mutex_unlock(&codec->widget_lock); |
246bb4aa TI |
152 | if (err < 0) { |
153 | device_del(&codec->dev); | |
154 | return err; | |
155 | } | |
3256be65 TI |
156 | |
157 | return 0; | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(snd_hdac_device_register); | |
160 | ||
161 | /** | |
162 | * snd_hdac_device_unregister - unregister the hd-audio codec base device | |
6e57188f | 163 | * @codec: the device to unregister |
3256be65 TI |
164 | */ |
165 | void snd_hdac_device_unregister(struct hdac_device *codec) | |
166 | { | |
167 | if (device_is_registered(&codec->dev)) { | |
ed180abb | 168 | mutex_lock(&codec->widget_lock); |
3256be65 | 169 | hda_widget_sysfs_exit(codec); |
ed180abb | 170 | mutex_unlock(&codec->widget_lock); |
ee5f85d9 | 171 | device_del(&codec->dev); |
246bb4aa | 172 | snd_hdac_bus_remove_device(codec->bus, codec); |
3256be65 TI |
173 | } |
174 | } | |
175 | EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); | |
176 | ||
ded255be TI |
177 | /** |
178 | * snd_hdac_device_set_chip_name - set/update the codec name | |
179 | * @codec: the HDAC device | |
180 | * @name: name string to set | |
181 | * | |
182 | * Returns 0 if the name is set or updated, or a negative error code. | |
183 | */ | |
184 | int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) | |
185 | { | |
186 | char *newname; | |
187 | ||
188 | if (!name) | |
189 | return 0; | |
190 | newname = kstrdup(name, GFP_KERNEL); | |
191 | if (!newname) | |
192 | return -ENOMEM; | |
193 | kfree(codec->chip_name); | |
194 | codec->chip_name = newname; | |
195 | return 0; | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); | |
198 | ||
4f9e0c38 TI |
199 | /** |
200 | * snd_hdac_codec_modalias - give the module alias name | |
201 | * @codec: HDAC device | |
202 | * @buf: string buffer to store | |
203 | * @size: string buffer size | |
204 | * | |
205 | * Returns the size of string, like snprintf(), or a negative error code. | |
206 | */ | |
207 | int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size) | |
208 | { | |
0a7efa14 | 209 | return scnprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n", |
4f9e0c38 TI |
210 | codec->vendor_id, codec->revision_id, codec->type); |
211 | } | |
212 | EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); | |
213 | ||
7639a06c TI |
214 | /** |
215 | * snd_hdac_make_cmd - compose a 32bit command word to be sent to the | |
216 | * HD-audio controller | |
217 | * @codec: the codec object | |
218 | * @nid: NID to encode | |
219 | * @verb: verb to encode | |
220 | * @parm: parameter to encode | |
221 | * | |
222 | * Return an encoded command verb or -1 for error. | |
223 | */ | |
ddf7cb83 TI |
224 | static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, |
225 | unsigned int verb, unsigned int parm) | |
7639a06c TI |
226 | { |
227 | u32 val, addr; | |
228 | ||
229 | addr = codec->addr; | |
230 | if ((addr & ~0xf) || (nid & ~0x7f) || | |
231 | (verb & ~0xfff) || (parm & ~0xffff)) { | |
232 | dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n", | |
233 | addr, nid, verb, parm); | |
234 | return -1; | |
235 | } | |
236 | ||
237 | val = addr << 28; | |
238 | val |= (u32)nid << 20; | |
239 | val |= verb << 8; | |
240 | val |= parm; | |
241 | return val; | |
242 | } | |
7639a06c | 243 | |
05852448 TI |
244 | /** |
245 | * snd_hdac_exec_verb - execute an encoded verb | |
246 | * @codec: the codec object | |
247 | * @cmd: encoded verb to execute | |
248 | * @flags: optional flags, pass zero for default | |
249 | * @res: the pointer to store the result, NULL if running async | |
250 | * | |
251 | * Returns zero if successful, or a negative error code. | |
252 | * | |
253 | * This calls the exec_verb op when set in hdac_codec. If not, | |
254 | * call the default snd_hdac_bus_exec_verb(). | |
255 | */ | |
256 | int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, | |
257 | unsigned int flags, unsigned int *res) | |
258 | { | |
259 | if (codec->exec_verb) | |
260 | return codec->exec_verb(codec, cmd, flags, res); | |
261 | return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res); | |
262 | } | |
05852448 TI |
263 | |
264 | ||
7639a06c TI |
265 | /** |
266 | * snd_hdac_read - execute a verb | |
267 | * @codec: the codec object | |
268 | * @nid: NID to execute a verb | |
269 | * @verb: verb to execute | |
270 | * @parm: parameter for a verb | |
271 | * @res: the pointer to store the result, NULL if running async | |
272 | * | |
273 | * Returns zero if successful, or a negative error code. | |
274 | */ | |
275 | int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, | |
276 | unsigned int verb, unsigned int parm, unsigned int *res) | |
277 | { | |
278 | unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); | |
279 | ||
05852448 | 280 | return snd_hdac_exec_verb(codec, cmd, 0, res); |
7639a06c TI |
281 | } |
282 | EXPORT_SYMBOL_GPL(snd_hdac_read); | |
283 | ||
284 | /** | |
01ed3c06 | 285 | * _snd_hdac_read_parm - read a parmeter |
6e57188f KJ |
286 | * @codec: the codec object |
287 | * @nid: NID to read a parameter | |
288 | * @parm: parameter to read | |
289 | * @res: pointer to store the read value | |
7639a06c | 290 | * |
01ed3c06 | 291 | * This function returns zero or an error unlike snd_hdac_read_parm(). |
7639a06c | 292 | */ |
01ed3c06 TI |
293 | int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, |
294 | unsigned int *res) | |
7639a06c | 295 | { |
01ed3c06 | 296 | unsigned int cmd; |
7639a06c | 297 | |
01ed3c06 TI |
298 | cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; |
299 | return snd_hdac_regmap_read_raw(codec, cmd, res); | |
7639a06c | 300 | } |
01ed3c06 | 301 | EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); |
7639a06c | 302 | |
9ba17b4d TI |
303 | /** |
304 | * snd_hdac_read_parm_uncached - read a codec parameter without caching | |
7639a06c TI |
305 | * @codec: the codec object |
306 | * @nid: NID to read a parameter | |
307 | * @parm: parameter to read | |
308 | * | |
309 | * Returns -1 for error. If you need to distinguish the error more | |
310 | * strictly, use snd_hdac_read() directly. | |
311 | */ | |
9ba17b4d TI |
312 | int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, |
313 | int parm) | |
7639a06c | 314 | { |
3194ed49 | 315 | unsigned int cmd, val; |
7639a06c | 316 | |
3194ed49 TI |
317 | cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; |
318 | if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0) | |
319 | return -1; | |
7639a06c TI |
320 | return val; |
321 | } | |
9ba17b4d TI |
322 | EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); |
323 | ||
faa75f8a TI |
324 | /** |
325 | * snd_hdac_override_parm - override read-only parameters | |
326 | * @codec: the codec object | |
327 | * @nid: NID for the parameter | |
328 | * @parm: the parameter to change | |
329 | * @val: the parameter value to overwrite | |
330 | */ | |
331 | int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, | |
332 | unsigned int parm, unsigned int val) | |
333 | { | |
334 | unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; | |
335 | int err; | |
336 | ||
337 | if (!codec->regmap) | |
338 | return -EINVAL; | |
339 | ||
340 | codec->caps_overwriting = true; | |
341 | err = snd_hdac_regmap_write_raw(codec, verb, val); | |
342 | codec->caps_overwriting = false; | |
343 | return err; | |
344 | } | |
345 | EXPORT_SYMBOL_GPL(snd_hdac_override_parm); | |
7639a06c TI |
346 | |
347 | /** | |
348 | * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes | |
349 | * @codec: the codec object | |
350 | * @nid: NID to inspect | |
351 | * @start_id: the pointer to store the starting NID | |
352 | * | |
353 | * Returns the number of subtree nodes or zero if not found. | |
9ba17b4d | 354 | * This function reads parameters always without caching. |
7639a06c TI |
355 | */ |
356 | int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, | |
357 | hda_nid_t *start_id) | |
358 | { | |
359 | unsigned int parm; | |
360 | ||
9ba17b4d | 361 | parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); |
7639a06c TI |
362 | if (parm == -1) { |
363 | *start_id = 0; | |
364 | return 0; | |
365 | } | |
366 | *start_id = (parm >> 16) & 0x7fff; | |
367 | return (int)(parm & 0x7fff); | |
368 | } | |
369 | EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); | |
370 | ||
371 | /* | |
372 | * look for an AFG and MFG nodes | |
373 | */ | |
374 | static void setup_fg_nodes(struct hdac_device *codec) | |
375 | { | |
376 | int i, total_nodes, function_id; | |
377 | hda_nid_t nid; | |
378 | ||
379 | total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); | |
380 | for (i = 0; i < total_nodes; i++, nid++) { | |
381 | function_id = snd_hdac_read_parm(codec, nid, | |
382 | AC_PAR_FUNCTION_TYPE); | |
383 | switch (function_id & 0xff) { | |
384 | case AC_GRP_AUDIO_FUNCTION: | |
385 | codec->afg = nid; | |
386 | codec->afg_function_id = function_id & 0xff; | |
387 | codec->afg_unsol = (function_id >> 8) & 1; | |
388 | break; | |
389 | case AC_GRP_MODEM_FUNCTION: | |
390 | codec->mfg = nid; | |
391 | codec->mfg_function_id = function_id & 0xff; | |
392 | codec->mfg_unsol = (function_id >> 8) & 1; | |
393 | break; | |
394 | default: | |
395 | break; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | /** | |
401 | * snd_hdac_refresh_widgets - Reset the widget start/end nodes | |
402 | * @codec: the codec object | |
403 | */ | |
774a075a | 404 | int snd_hdac_refresh_widgets(struct hdac_device *codec) |
7639a06c TI |
405 | { |
406 | hda_nid_t start_nid; | |
98482377 | 407 | int nums, err = 0; |
7639a06c | 408 | |
98482377 EG |
409 | /* |
410 | * Serialize against multiple threads trying to update the sysfs | |
411 | * widgets array. | |
412 | */ | |
413 | mutex_lock(&codec->widget_lock); | |
7639a06c TI |
414 | nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); |
415 | if (!start_nid || nums <= 0 || nums >= 0xff) { | |
416 | dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n", | |
417 | codec->afg); | |
98482377 EG |
418 | err = -EINVAL; |
419 | goto unlock; | |
7639a06c TI |
420 | } |
421 | ||
774a075a TI |
422 | err = hda_widget_sysfs_reinit(codec, start_nid, nums); |
423 | if (err < 0) | |
424 | goto unlock; | |
9780ded3 | 425 | |
7639a06c TI |
426 | codec->num_nodes = nums; |
427 | codec->start_nid = start_nid; | |
428 | codec->end_nid = start_nid + nums; | |
98482377 EG |
429 | unlock: |
430 | mutex_unlock(&codec->widget_lock); | |
431 | return err; | |
7639a06c TI |
432 | } |
433 | EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); | |
434 | ||
435 | /* return CONNLIST_LEN parameter of the given widget */ | |
436 | static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) | |
437 | { | |
438 | unsigned int wcaps = get_wcaps(codec, nid); | |
439 | unsigned int parm; | |
440 | ||
441 | if (!(wcaps & AC_WCAP_CONN_LIST) && | |
442 | get_wcaps_type(wcaps) != AC_WID_VOL_KNB) | |
443 | return 0; | |
444 | ||
445 | parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); | |
446 | if (parm == -1) | |
447 | parm = 0; | |
448 | return parm; | |
449 | } | |
450 | ||
451 | /** | |
452 | * snd_hdac_get_connections - get a widget connection list | |
453 | * @codec: the codec object | |
454 | * @nid: NID | |
455 | * @conn_list: the array to store the results, can be NULL | |
456 | * @max_conns: the max size of the given array | |
457 | * | |
458 | * Returns the number of connected widgets, zero for no connection, or a | |
459 | * negative error code. When the number of elements don't fit with the | |
460 | * given array size, it returns -ENOSPC. | |
461 | * | |
462 | * When @conn_list is NULL, it just checks the number of connections. | |
463 | */ | |
464 | int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, | |
465 | hda_nid_t *conn_list, int max_conns) | |
466 | { | |
467 | unsigned int parm; | |
468 | int i, conn_len, conns, err; | |
469 | unsigned int shift, num_elems, mask; | |
470 | hda_nid_t prev_nid; | |
471 | int null_count = 0; | |
472 | ||
473 | parm = get_num_conns(codec, nid); | |
474 | if (!parm) | |
475 | return 0; | |
476 | ||
477 | if (parm & AC_CLIST_LONG) { | |
478 | /* long form */ | |
479 | shift = 16; | |
480 | num_elems = 2; | |
481 | } else { | |
482 | /* short form */ | |
483 | shift = 8; | |
484 | num_elems = 4; | |
485 | } | |
486 | conn_len = parm & AC_CLIST_LENGTH; | |
487 | mask = (1 << (shift-1)) - 1; | |
488 | ||
489 | if (!conn_len) | |
490 | return 0; /* no connection */ | |
491 | ||
492 | if (conn_len == 1) { | |
493 | /* single connection */ | |
494 | err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, | |
495 | &parm); | |
496 | if (err < 0) | |
497 | return err; | |
498 | if (conn_list) | |
499 | conn_list[0] = parm & mask; | |
500 | return 1; | |
501 | } | |
502 | ||
503 | /* multi connection */ | |
504 | conns = 0; | |
505 | prev_nid = 0; | |
506 | for (i = 0; i < conn_len; i++) { | |
507 | int range_val; | |
508 | hda_nid_t val, n; | |
509 | ||
510 | if (i % num_elems == 0) { | |
511 | err = snd_hdac_read(codec, nid, | |
512 | AC_VERB_GET_CONNECT_LIST, i, | |
513 | &parm); | |
514 | if (err < 0) | |
515 | return -EIO; | |
516 | } | |
517 | range_val = !!(parm & (1 << (shift-1))); /* ranges */ | |
518 | val = parm & mask; | |
519 | if (val == 0 && null_count++) { /* no second chance */ | |
520 | dev_dbg(&codec->dev, | |
521 | "invalid CONNECT_LIST verb %x[%i]:%x\n", | |
522 | nid, i, parm); | |
523 | return 0; | |
524 | } | |
525 | parm >>= shift; | |
526 | if (range_val) { | |
527 | /* ranges between the previous and this one */ | |
528 | if (!prev_nid || prev_nid >= val) { | |
529 | dev_warn(&codec->dev, | |
530 | "invalid dep_range_val %x:%x\n", | |
531 | prev_nid, val); | |
532 | continue; | |
533 | } | |
534 | for (n = prev_nid + 1; n <= val; n++) { | |
535 | if (conn_list) { | |
536 | if (conns >= max_conns) | |
537 | return -ENOSPC; | |
538 | conn_list[conns] = n; | |
539 | } | |
540 | conns++; | |
541 | } | |
542 | } else { | |
543 | if (conn_list) { | |
544 | if (conns >= max_conns) | |
545 | return -ENOSPC; | |
546 | conn_list[conns] = val; | |
547 | } | |
548 | conns++; | |
549 | } | |
550 | prev_nid = val; | |
551 | } | |
552 | return conns; | |
553 | } | |
554 | EXPORT_SYMBOL_GPL(snd_hdac_get_connections); | |
555 | ||
556 | #ifdef CONFIG_PM | |
557 | /** | |
664c7155 | 558 | * snd_hdac_power_up - power up the codec |
7639a06c | 559 | * @codec: the codec object |
664c7155 TI |
560 | * |
561 | * This function calls the runtime PM helper to power up the given codec. | |
562 | * Unlike snd_hdac_power_up_pm(), you should call this only for the code | |
563 | * path that isn't included in PM path. Otherwise it gets stuck. | |
fbce23a0 TI |
564 | * |
565 | * Returns zero if successful, or a negative error code. | |
7639a06c | 566 | */ |
fbce23a0 | 567 | int snd_hdac_power_up(struct hdac_device *codec) |
7639a06c | 568 | { |
fbce23a0 | 569 | return pm_runtime_get_sync(&codec->dev); |
7639a06c TI |
570 | } |
571 | EXPORT_SYMBOL_GPL(snd_hdac_power_up); | |
572 | ||
573 | /** | |
664c7155 | 574 | * snd_hdac_power_down - power down the codec |
7639a06c | 575 | * @codec: the codec object |
fbce23a0 TI |
576 | * |
577 | * Returns zero if successful, or a negative error code. | |
7639a06c | 578 | */ |
fbce23a0 | 579 | int snd_hdac_power_down(struct hdac_device *codec) |
7639a06c TI |
580 | { |
581 | struct device *dev = &codec->dev; | |
582 | ||
7639a06c | 583 | pm_runtime_mark_last_busy(dev); |
fbce23a0 | 584 | return pm_runtime_put_autosuspend(dev); |
7639a06c TI |
585 | } |
586 | EXPORT_SYMBOL_GPL(snd_hdac_power_down); | |
c3aeda62 TI |
587 | |
588 | /** | |
589 | * snd_hdac_power_up_pm - power up the codec | |
590 | * @codec: the codec object | |
591 | * | |
592 | * This function can be called in a recursive code path like init code | |
593 | * which may be called by PM suspend/resume again. OTOH, if a power-up | |
594 | * call must wake up the sleeper (e.g. in a kctl callback), use | |
595 | * snd_hdac_power_up() instead. | |
fbce23a0 TI |
596 | * |
597 | * Returns zero if successful, or a negative error code. | |
c3aeda62 | 598 | */ |
fbce23a0 | 599 | int snd_hdac_power_up_pm(struct hdac_device *codec) |
c3aeda62 TI |
600 | { |
601 | if (!atomic_inc_not_zero(&codec->in_pm)) | |
fbce23a0 TI |
602 | return snd_hdac_power_up(codec); |
603 | return 0; | |
c3aeda62 TI |
604 | } |
605 | EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); | |
606 | ||
fc4f000b TI |
607 | /* like snd_hdac_power_up_pm(), but only increment the pm count when |
608 | * already powered up. Returns -1 if not powered up, 1 if incremented | |
609 | * or 0 if unchanged. Only used in hdac_regmap.c | |
610 | */ | |
611 | int snd_hdac_keep_power_up(struct hdac_device *codec) | |
612 | { | |
613 | if (!atomic_inc_not_zero(&codec->in_pm)) { | |
614 | int ret = pm_runtime_get_if_in_use(&codec->dev); | |
615 | if (!ret) | |
616 | return -1; | |
617 | if (ret < 0) | |
618 | return 0; | |
619 | } | |
620 | return 1; | |
621 | } | |
622 | ||
c3aeda62 TI |
623 | /** |
624 | * snd_hdac_power_down_pm - power down the codec | |
625 | * @codec: the codec object | |
626 | * | |
627 | * Like snd_hdac_power_up_pm(), this function is used in a recursive | |
628 | * code path like init code which may be called by PM suspend/resume again. | |
fbce23a0 TI |
629 | * |
630 | * Returns zero if successful, or a negative error code. | |
c3aeda62 | 631 | */ |
fbce23a0 | 632 | int snd_hdac_power_down_pm(struct hdac_device *codec) |
c3aeda62 TI |
633 | { |
634 | if (atomic_dec_if_positive(&codec->in_pm) < 0) | |
fbce23a0 TI |
635 | return snd_hdac_power_down(codec); |
636 | return 0; | |
c3aeda62 TI |
637 | } |
638 | EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); | |
7639a06c TI |
639 | #endif |
640 | ||
641 | /* codec vendor labels */ | |
642 | struct hda_vendor_id { | |
643 | unsigned int id; | |
644 | const char *name; | |
645 | }; | |
646 | ||
bf82326f | 647 | static const struct hda_vendor_id hda_vendor_ids[] = { |
7639a06c TI |
648 | { 0x1002, "ATI" }, |
649 | { 0x1013, "Cirrus Logic" }, | |
650 | { 0x1057, "Motorola" }, | |
651 | { 0x1095, "Silicon Image" }, | |
652 | { 0x10de, "Nvidia" }, | |
653 | { 0x10ec, "Realtek" }, | |
654 | { 0x1102, "Creative" }, | |
655 | { 0x1106, "VIA" }, | |
656 | { 0x111d, "IDT" }, | |
657 | { 0x11c1, "LSI" }, | |
658 | { 0x11d4, "Analog Devices" }, | |
659 | { 0x13f6, "C-Media" }, | |
660 | { 0x14f1, "Conexant" }, | |
661 | { 0x17e8, "Chrontel" }, | |
662 | { 0x1854, "LG" }, | |
663 | { 0x1aec, "Wolfson Microelectronics" }, | |
664 | { 0x1af4, "QEMU" }, | |
665 | { 0x434d, "C-Media" }, | |
666 | { 0x8086, "Intel" }, | |
667 | { 0x8384, "SigmaTel" }, | |
668 | {} /* terminator */ | |
669 | }; | |
670 | ||
671 | /* store the codec vendor name */ | |
672 | static int get_codec_vendor_name(struct hdac_device *codec) | |
673 | { | |
674 | const struct hda_vendor_id *c; | |
675 | u16 vendor_id = codec->vendor_id >> 16; | |
676 | ||
677 | for (c = hda_vendor_ids; c->id; c++) { | |
678 | if (c->id == vendor_id) { | |
679 | codec->vendor_name = kstrdup(c->name, GFP_KERNEL); | |
680 | return codec->vendor_name ? 0 : -ENOMEM; | |
681 | } | |
682 | } | |
683 | ||
684 | codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id); | |
685 | return codec->vendor_name ? 0 : -ENOMEM; | |
686 | } | |
b7d023e1 TI |
687 | |
688 | /* | |
689 | * stream formats | |
690 | */ | |
691 | struct hda_rate_tbl { | |
692 | unsigned int hz; | |
693 | unsigned int alsa_bits; | |
694 | unsigned int hda_fmt; | |
695 | }; | |
696 | ||
697 | /* rate = base * mult / div */ | |
698 | #define HDA_RATE(base, mult, div) \ | |
699 | (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ | |
700 | (((div) - 1) << AC_FMT_DIV_SHIFT)) | |
701 | ||
bf82326f | 702 | static const struct hda_rate_tbl rate_bits[] = { |
b7d023e1 TI |
703 | /* rate in Hz, ALSA rate bitmask, HDA format value */ |
704 | ||
705 | /* autodetected value used in snd_hda_query_supported_pcm */ | |
706 | { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, | |
707 | { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, | |
708 | { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, | |
709 | { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, | |
710 | { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, | |
711 | { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, | |
712 | { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, | |
713 | { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, | |
714 | { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, | |
715 | { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, | |
716 | { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, | |
717 | #define AC_PAR_PCM_RATE_BITS 11 | |
718 | /* up to bits 10, 384kHZ isn't supported properly */ | |
719 | ||
720 | /* not autodetected value */ | |
721 | { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, | |
722 | ||
723 | { 0 } /* terminator */ | |
724 | }; | |
725 | ||
726 | /** | |
727 | * snd_hdac_calc_stream_format - calculate the format bitset | |
728 | * @rate: the sample rate | |
729 | * @channels: the number of channels | |
730 | * @format: the PCM format (SNDRV_PCM_FORMAT_XXX) | |
731 | * @maxbps: the max. bps | |
732 | * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant) | |
733 | * | |
734 | * Calculate the format bitset from the given rate, channels and th PCM format. | |
735 | * | |
736 | * Return zero if invalid. | |
737 | */ | |
738 | unsigned int snd_hdac_calc_stream_format(unsigned int rate, | |
739 | unsigned int channels, | |
a6ea5fe9 | 740 | snd_pcm_format_t format, |
b7d023e1 TI |
741 | unsigned int maxbps, |
742 | unsigned short spdif_ctls) | |
743 | { | |
744 | int i; | |
745 | unsigned int val = 0; | |
746 | ||
747 | for (i = 0; rate_bits[i].hz; i++) | |
748 | if (rate_bits[i].hz == rate) { | |
749 | val = rate_bits[i].hda_fmt; | |
750 | break; | |
751 | } | |
752 | if (!rate_bits[i].hz) | |
753 | return 0; | |
754 | ||
755 | if (channels == 0 || channels > 8) | |
756 | return 0; | |
757 | val |= channels - 1; | |
758 | ||
759 | switch (snd_pcm_format_width(format)) { | |
760 | case 8: | |
761 | val |= AC_FMT_BITS_8; | |
762 | break; | |
763 | case 16: | |
764 | val |= AC_FMT_BITS_16; | |
765 | break; | |
766 | case 20: | |
767 | case 24: | |
768 | case 32: | |
769 | if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE) | |
770 | val |= AC_FMT_BITS_32; | |
771 | else if (maxbps >= 24) | |
772 | val |= AC_FMT_BITS_24; | |
773 | else | |
774 | val |= AC_FMT_BITS_20; | |
775 | break; | |
776 | default: | |
777 | return 0; | |
778 | } | |
779 | ||
780 | if (spdif_ctls & AC_DIG1_NONAUDIO) | |
781 | val |= AC_FMT_TYPE_NON_PCM; | |
782 | ||
783 | return val; | |
784 | } | |
785 | EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format); | |
786 | ||
787 | static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid) | |
788 | { | |
789 | unsigned int val = 0; | |
790 | ||
791 | if (nid != codec->afg && | |
792 | (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) | |
793 | val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM); | |
794 | if (!val || val == -1) | |
795 | val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM); | |
796 | if (!val || val == -1) | |
797 | return 0; | |
798 | return val; | |
799 | } | |
800 | ||
801 | static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid) | |
802 | { | |
803 | unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM); | |
804 | ||
805 | if (!streams || streams == -1) | |
806 | streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM); | |
807 | if (!streams || streams == -1) | |
808 | return 0; | |
809 | return streams; | |
810 | } | |
811 | ||
812 | /** | |
813 | * snd_hdac_query_supported_pcm - query the supported PCM rates and formats | |
814 | * @codec: the codec object | |
815 | * @nid: NID to query | |
816 | * @ratesp: the pointer to store the detected rate bitflags | |
817 | * @formatsp: the pointer to store the detected formats | |
818 | * @bpsp: the pointer to store the detected format widths | |
819 | * | |
820 | * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp | |
821 | * or @bsps argument is ignored. | |
822 | * | |
823 | * Returns 0 if successful, otherwise a negative error code. | |
824 | */ | |
825 | int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, | |
826 | u32 *ratesp, u64 *formatsp, unsigned int *bpsp) | |
827 | { | |
828 | unsigned int i, val, wcaps; | |
829 | ||
830 | wcaps = get_wcaps(codec, nid); | |
831 | val = query_pcm_param(codec, nid); | |
832 | ||
833 | if (ratesp) { | |
834 | u32 rates = 0; | |
835 | for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) { | |
836 | if (val & (1 << i)) | |
837 | rates |= rate_bits[i].alsa_bits; | |
838 | } | |
839 | if (rates == 0) { | |
840 | dev_err(&codec->dev, | |
841 | "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n", | |
842 | nid, val, | |
843 | (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0); | |
844 | return -EIO; | |
845 | } | |
846 | *ratesp = rates; | |
847 | } | |
848 | ||
849 | if (formatsp || bpsp) { | |
850 | u64 formats = 0; | |
851 | unsigned int streams, bps; | |
852 | ||
853 | streams = query_stream_param(codec, nid); | |
854 | if (!streams) | |
855 | return -EIO; | |
856 | ||
857 | bps = 0; | |
858 | if (streams & AC_SUPFMT_PCM) { | |
859 | if (val & AC_SUPPCM_BITS_8) { | |
860 | formats |= SNDRV_PCM_FMTBIT_U8; | |
861 | bps = 8; | |
862 | } | |
863 | if (val & AC_SUPPCM_BITS_16) { | |
864 | formats |= SNDRV_PCM_FMTBIT_S16_LE; | |
865 | bps = 16; | |
866 | } | |
867 | if (wcaps & AC_WCAP_DIGITAL) { | |
868 | if (val & AC_SUPPCM_BITS_32) | |
869 | formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; | |
870 | if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24)) | |
871 | formats |= SNDRV_PCM_FMTBIT_S32_LE; | |
872 | if (val & AC_SUPPCM_BITS_24) | |
873 | bps = 24; | |
874 | else if (val & AC_SUPPCM_BITS_20) | |
875 | bps = 20; | |
876 | } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24| | |
877 | AC_SUPPCM_BITS_32)) { | |
878 | formats |= SNDRV_PCM_FMTBIT_S32_LE; | |
879 | if (val & AC_SUPPCM_BITS_32) | |
880 | bps = 32; | |
881 | else if (val & AC_SUPPCM_BITS_24) | |
882 | bps = 24; | |
883 | else if (val & AC_SUPPCM_BITS_20) | |
884 | bps = 20; | |
885 | } | |
886 | } | |
887 | #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */ | |
888 | if (streams & AC_SUPFMT_FLOAT32) { | |
889 | formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; | |
890 | if (!bps) | |
891 | bps = 32; | |
892 | } | |
893 | #endif | |
894 | if (streams == AC_SUPFMT_AC3) { | |
895 | /* should be exclusive */ | |
896 | /* temporary hack: we have still no proper support | |
897 | * for the direct AC3 stream... | |
898 | */ | |
899 | formats |= SNDRV_PCM_FMTBIT_U8; | |
900 | bps = 8; | |
901 | } | |
902 | if (formats == 0) { | |
903 | dev_err(&codec->dev, | |
904 | "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n", | |
905 | nid, val, | |
906 | (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0, | |
907 | streams); | |
908 | return -EIO; | |
909 | } | |
910 | if (formatsp) | |
911 | *formatsp = formats; | |
912 | if (bpsp) | |
913 | *bpsp = bps; | |
914 | } | |
915 | ||
916 | return 0; | |
917 | } | |
918 | EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm); | |
919 | ||
920 | /** | |
921 | * snd_hdac_is_supported_format - Check the validity of the format | |
922 | * @codec: the codec object | |
923 | * @nid: NID to check | |
924 | * @format: the HD-audio format value to check | |
925 | * | |
926 | * Check whether the given node supports the format value. | |
927 | * | |
928 | * Returns true if supported, false if not. | |
929 | */ | |
930 | bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, | |
931 | unsigned int format) | |
932 | { | |
933 | int i; | |
934 | unsigned int val = 0, rate, stream; | |
935 | ||
936 | val = query_pcm_param(codec, nid); | |
937 | if (!val) | |
938 | return false; | |
939 | ||
940 | rate = format & 0xff00; | |
941 | for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) | |
942 | if (rate_bits[i].hda_fmt == rate) { | |
943 | if (val & (1 << i)) | |
944 | break; | |
945 | return false; | |
946 | } | |
947 | if (i >= AC_PAR_PCM_RATE_BITS) | |
948 | return false; | |
949 | ||
950 | stream = query_stream_param(codec, nid); | |
951 | if (!stream) | |
952 | return false; | |
953 | ||
954 | if (stream & AC_SUPFMT_PCM) { | |
955 | switch (format & 0xf0) { | |
956 | case 0x00: | |
957 | if (!(val & AC_SUPPCM_BITS_8)) | |
958 | return false; | |
959 | break; | |
960 | case 0x10: | |
961 | if (!(val & AC_SUPPCM_BITS_16)) | |
962 | return false; | |
963 | break; | |
964 | case 0x20: | |
965 | if (!(val & AC_SUPPCM_BITS_20)) | |
966 | return false; | |
967 | break; | |
968 | case 0x30: | |
969 | if (!(val & AC_SUPPCM_BITS_24)) | |
970 | return false; | |
971 | break; | |
972 | case 0x40: | |
973 | if (!(val & AC_SUPPCM_BITS_32)) | |
974 | return false; | |
975 | break; | |
976 | default: | |
977 | return false; | |
978 | } | |
979 | } else { | |
980 | /* FIXME: check for float32 and AC3? */ | |
981 | } | |
982 | ||
983 | return true; | |
984 | } | |
985 | EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format); | |
1b5e6167 SP |
986 | |
987 | static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid, | |
988 | int flags, unsigned int verb, unsigned int parm) | |
989 | { | |
990 | unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); | |
991 | unsigned int res; | |
992 | ||
993 | if (snd_hdac_exec_verb(hdac, cmd, flags, &res)) | |
994 | return -1; | |
995 | ||
996 | return res; | |
997 | } | |
998 | ||
999 | static int codec_write(struct hdac_device *hdac, hda_nid_t nid, | |
1000 | int flags, unsigned int verb, unsigned int parm) | |
1001 | { | |
1002 | unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm); | |
1003 | ||
1004 | return snd_hdac_exec_verb(hdac, cmd, flags, NULL); | |
1005 | } | |
1006 | ||
1007 | /** | |
1008 | * snd_hdac_codec_read - send a command and get the response | |
1009 | * @hdac: the HDAC device | |
1010 | * @nid: NID to send the command | |
1011 | * @flags: optional bit flags | |
1012 | * @verb: the verb to send | |
1013 | * @parm: the parameter for the verb | |
1014 | * | |
1015 | * Send a single command and read the corresponding response. | |
1016 | * | |
1017 | * Returns the obtained response value, or -1 for an error. | |
1018 | */ | |
1019 | int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid, | |
1020 | int flags, unsigned int verb, unsigned int parm) | |
1021 | { | |
1022 | return codec_read(hdac, nid, flags, verb, parm); | |
1023 | } | |
1024 | EXPORT_SYMBOL_GPL(snd_hdac_codec_read); | |
1025 | ||
1026 | /** | |
1027 | * snd_hdac_codec_write - send a single command without waiting for response | |
1028 | * @hdac: the HDAC device | |
1029 | * @nid: NID to send the command | |
1030 | * @flags: optional bit flags | |
1031 | * @verb: the verb to send | |
1032 | * @parm: the parameter for the verb | |
1033 | * | |
1034 | * Send a single command without waiting for response. | |
1035 | * | |
1036 | * Returns 0 if successful, or a negative error code. | |
1037 | */ | |
1038 | int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid, | |
1039 | int flags, unsigned int verb, unsigned int parm) | |
1040 | { | |
1041 | return codec_write(hdac, nid, flags, verb, parm); | |
1042 | } | |
1043 | EXPORT_SYMBOL_GPL(snd_hdac_codec_write); | |
1044 | ||
78dd5e21 TI |
1045 | /** |
1046 | * snd_hdac_check_power_state - check whether the actual power state matches | |
1b5e6167 SP |
1047 | * with the target state |
1048 | * | |
1049 | * @hdac: the HDAC device | |
1050 | * @nid: NID to send the command | |
1051 | * @target_state: target state to check for | |
1052 | * | |
1053 | * Return true if state matches, false if not | |
1054 | */ | |
1055 | bool snd_hdac_check_power_state(struct hdac_device *hdac, | |
1056 | hda_nid_t nid, unsigned int target_state) | |
1057 | { | |
1058 | unsigned int state = codec_read(hdac, nid, 0, | |
1059 | AC_VERB_GET_POWER_STATE, 0); | |
1060 | ||
1061 | if (state & AC_PWRST_ERROR) | |
1062 | return true; | |
1063 | state = (state >> 4) & 0x0f; | |
1064 | return (state == target_state); | |
1065 | } | |
1066 | EXPORT_SYMBOL_GPL(snd_hdac_check_power_state); | |
09787492 AK |
1067 | /** |
1068 | * snd_hdac_sync_power_state - wait until actual power state matches | |
1069 | * with the target state | |
1070 | * | |
6e57188f | 1071 | * @codec: the HDAC device |
09787492 | 1072 | * @nid: NID to send the command |
6e57188f | 1073 | * @power_state: target power state to wait for |
09787492 AK |
1074 | * |
1075 | * Return power state or PS_ERROR if codec rejects GET verb. | |
1076 | */ | |
1077 | unsigned int snd_hdac_sync_power_state(struct hdac_device *codec, | |
1078 | hda_nid_t nid, unsigned int power_state) | |
1079 | { | |
1080 | unsigned long end_time = jiffies + msecs_to_jiffies(500); | |
1081 | unsigned int state, actual_state, count; | |
1082 | ||
1083 | for (count = 0; count < 500; count++) { | |
1084 | state = snd_hdac_codec_read(codec, nid, 0, | |
1085 | AC_VERB_GET_POWER_STATE, 0); | |
1086 | if (state & AC_PWRST_ERROR) { | |
1087 | msleep(20); | |
1088 | break; | |
1089 | } | |
1090 | actual_state = (state >> 4) & 0x0f; | |
1091 | if (actual_state == power_state) | |
1092 | break; | |
1093 | if (time_after_eq(jiffies, end_time)) | |
1094 | break; | |
1095 | /* wait until the codec reachs to the target state */ | |
1096 | msleep(1); | |
1097 | } | |
1098 | return state; | |
1099 | } | |
1100 | EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state); |