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[mirror_ubuntu-bionic-kernel.git] / sound / pci / hda / hda_bind.c
1 /*
2 * HD-audio codec driver binding
3 * Copyright (c) Takashi Iwai <tiwai@suse.de>
4 */
5
6 #include <linux/init.h>
7 #include <linux/slab.h>
8 #include <linux/mutex.h>
9 #include <linux/module.h>
10 #include <linux/export.h>
11 #include <linux/pm.h>
12 #include <linux/pm_runtime.h>
13 #include <sound/core.h>
14 #include "hda_codec.h"
15 #include "hda_local.h"
16
17 /*
18 * find a matching codec preset
19 */
20 static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
21 {
22 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
23 struct hda_codec_driver *driver =
24 container_of(drv, struct hda_codec_driver, core);
25 const struct hda_codec_preset *preset;
26 /* check probe_id instead of vendor_id if set */
27 u32 id = codec->probe_id ? codec->probe_id : codec->core.vendor_id;
28
29 for (preset = driver->preset; preset->id; preset++) {
30 u32 mask = preset->mask;
31
32 if (preset->afg && preset->afg != codec->core.afg)
33 continue;
34 if (preset->mfg && preset->mfg != codec->core.mfg)
35 continue;
36 if (!mask)
37 mask = ~0;
38 if (preset->id == (id & mask) &&
39 (!preset->rev || preset->rev == codec->core.revision_id)) {
40 codec->preset = preset;
41 return 1;
42 }
43 }
44 return 0;
45 }
46
47 /* process an unsolicited event */
48 static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
49 {
50 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
51
52 if (codec->patch_ops.unsol_event)
53 codec->patch_ops.unsol_event(codec, ev);
54 }
55
56 /* reset the codec name from the preset */
57 static int codec_refresh_name(struct hda_codec *codec, const char *name)
58 {
59 if (name) {
60 kfree(codec->core.chip_name);
61 codec->core.chip_name = kstrdup(name, GFP_KERNEL);
62 }
63 return codec->core.chip_name ? 0 : -ENOMEM;
64 }
65
66 static int hda_codec_driver_probe(struct device *dev)
67 {
68 struct hda_codec *codec = dev_to_hda_codec(dev);
69 struct module *owner = dev->driver->owner;
70 int err;
71
72 if (WARN_ON(!codec->preset))
73 return -EINVAL;
74
75 err = codec_refresh_name(codec, codec->preset->name);
76 if (err < 0)
77 goto error;
78 err = snd_hdac_regmap_init(&codec->core);
79 if (err < 0)
80 goto error;
81
82 if (!try_module_get(owner)) {
83 err = -EINVAL;
84 goto error;
85 }
86
87 err = codec->preset->patch(codec);
88 if (err < 0)
89 goto error_module;
90
91 err = snd_hda_codec_build_pcms(codec);
92 if (err < 0)
93 goto error_module;
94 err = snd_hda_codec_build_controls(codec);
95 if (err < 0)
96 goto error_module;
97 if (codec->card->registered) {
98 err = snd_card_register(codec->card);
99 if (err < 0)
100 goto error_module;
101 snd_hda_codec_register(codec);
102 }
103
104 codec->core.lazy_cache = true;
105 return 0;
106
107 error_module:
108 module_put(owner);
109
110 error:
111 snd_hda_codec_cleanup_for_unbind(codec);
112 return err;
113 }
114
115 static int hda_codec_driver_remove(struct device *dev)
116 {
117 struct hda_codec *codec = dev_to_hda_codec(dev);
118
119 if (codec->patch_ops.free)
120 codec->patch_ops.free(codec);
121 snd_hda_codec_cleanup_for_unbind(codec);
122 module_put(dev->driver->owner);
123 return 0;
124 }
125
126 static void hda_codec_driver_shutdown(struct device *dev)
127 {
128 struct hda_codec *codec = dev_to_hda_codec(dev);
129
130 if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
131 codec->patch_ops.reboot_notify(codec);
132 }
133
134 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
135 struct module *owner)
136 {
137 drv->core.driver.name = name;
138 drv->core.driver.owner = owner;
139 drv->core.driver.bus = &snd_hda_bus_type;
140 drv->core.driver.probe = hda_codec_driver_probe;
141 drv->core.driver.remove = hda_codec_driver_remove;
142 drv->core.driver.shutdown = hda_codec_driver_shutdown;
143 drv->core.driver.pm = &hda_codec_driver_pm;
144 drv->core.type = HDA_DEV_LEGACY;
145 drv->core.match = hda_codec_match;
146 drv->core.unsol_event = hda_codec_unsol_event;
147 return driver_register(&drv->core.driver);
148 }
149 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
150
151 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
152 {
153 driver_unregister(&drv->core.driver);
154 }
155 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
156
157 static inline bool codec_probed(struct hda_codec *codec)
158 {
159 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
160 }
161
162 /* try to auto-load and bind the codec module */
163 static void codec_bind_module(struct hda_codec *codec)
164 {
165 #ifdef MODULE
166 request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
167 if (codec_probed(codec))
168 return;
169 request_module("snd-hda-codec-id:%04x*",
170 (codec->core.vendor_id >> 16) & 0xffff);
171 if (codec_probed(codec))
172 return;
173 #endif
174 }
175
176 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
177 /* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
178 static bool is_likely_hdmi_codec(struct hda_codec *codec)
179 {
180 hda_nid_t nid;
181
182 for_each_hda_codec_node(nid, codec) {
183 unsigned int wcaps = get_wcaps(codec, nid);
184 switch (get_wcaps_type(wcaps)) {
185 case AC_WID_AUD_IN:
186 return false; /* HDMI parser supports only HDMI out */
187 case AC_WID_AUD_OUT:
188 if (!(wcaps & AC_WCAP_DIGITAL))
189 return false;
190 break;
191 }
192 }
193 return true;
194 }
195 #else
196 /* no HDMI codec parser support */
197 #define is_likely_hdmi_codec(codec) false
198 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
199
200 static int codec_bind_generic(struct hda_codec *codec)
201 {
202 if (codec->probe_id)
203 return -ENODEV;
204
205 if (is_likely_hdmi_codec(codec)) {
206 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
207 #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
208 request_module("snd-hda-codec-hdmi");
209 #endif
210 if (codec_probed(codec))
211 return 0;
212 }
213
214 codec->probe_id = HDA_CODEC_ID_GENERIC;
215 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
216 request_module("snd-hda-codec-generic");
217 #endif
218 if (codec_probed(codec))
219 return 0;
220 return -ENODEV;
221 }
222
223 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
224 #define is_generic_config(codec) \
225 (codec->modelname && !strcmp(codec->modelname, "generic"))
226 #else
227 #define is_generic_config(codec) 0
228 #endif
229
230 /**
231 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
232 * @codec: the HDA codec
233 *
234 * Start parsing of the given codec tree and (re-)initialize the whole
235 * patch instance.
236 *
237 * Returns 0 if successful or a negative error code.
238 */
239 int snd_hda_codec_configure(struct hda_codec *codec)
240 {
241 int err;
242
243 if (is_generic_config(codec))
244 codec->probe_id = HDA_CODEC_ID_GENERIC;
245 else
246 codec->probe_id = 0;
247
248 err = snd_hdac_device_register(&codec->core);
249 if (err < 0)
250 return err;
251
252 if (!codec->preset)
253 codec_bind_module(codec);
254 if (!codec->preset) {
255 err = codec_bind_generic(codec);
256 if (err < 0) {
257 codec_err(codec, "Unable to bind the codec\n");
258 goto error;
259 }
260 }
261
262 /* audio codec should override the mixer name */
263 if (codec->core.afg || !*codec->card->mixername)
264 snprintf(codec->card->mixername,
265 sizeof(codec->card->mixername), "%s %s",
266 codec->core.vendor_name, codec->core.chip_name);
267 return 0;
268
269 error:
270 snd_hdac_device_unregister(&codec->core);
271 return err;
272 }
273 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);