2 * HD-audio codec driver binding
3 * Copyright (c) Takashi Iwai <tiwai@suse.de>
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>
12 #include <linux/pm_runtime.h>
13 #include <sound/core.h>
14 #include "hda_codec.h"
15 #include "hda_local.h"
18 * find a matching codec preset
20 static int hda_codec_match(struct hdac_device *dev, struct hdac_driver *drv)
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;
29 for (preset = driver->preset; preset->id; preset++) {
30 if (preset->id == id &&
31 (!preset->rev || preset->rev == codec->core.revision_id)) {
32 codec->preset = preset;
39 /* process an unsolicited event */
40 static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
42 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
44 if (codec->patch_ops.unsol_event)
45 codec->patch_ops.unsol_event(codec, ev);
49 * snd_hda_codec_set_name - set the codec name
50 * @codec: the HDA codec
51 * @name: name string to set
53 int snd_hda_codec_set_name(struct hda_codec *codec, const char *name)
59 err = snd_hdac_device_set_chip_name(&codec->core, name);
63 /* update the mixer name */
64 if (!*codec->card->mixername) {
65 snprintf(codec->card->mixername,
66 sizeof(codec->card->mixername), "%s %s",
67 codec->core.vendor_name, codec->core.chip_name);
72 EXPORT_SYMBOL_GPL(snd_hda_codec_set_name);
74 static int hda_codec_driver_probe(struct device *dev)
76 struct hda_codec *codec = dev_to_hda_codec(dev);
77 struct module *owner = dev->driver->owner;
80 if (WARN_ON(!codec->preset))
83 err = snd_hda_codec_set_name(codec, codec->preset->name);
86 err = snd_hdac_regmap_init(&codec->core);
90 if (!try_module_get(owner)) {
95 err = codec->preset->patch(codec);
99 err = snd_hda_codec_build_pcms(codec);
102 err = snd_hda_codec_build_controls(codec);
105 if (codec->card->registered) {
106 err = snd_card_register(codec->card);
109 snd_hda_codec_register(codec);
112 codec->core.lazy_cache = true;
119 snd_hda_codec_cleanup_for_unbind(codec);
123 static int hda_codec_driver_remove(struct device *dev)
125 struct hda_codec *codec = dev_to_hda_codec(dev);
127 if (codec->patch_ops.free)
128 codec->patch_ops.free(codec);
129 snd_hda_codec_cleanup_for_unbind(codec);
130 module_put(dev->driver->owner);
134 static void hda_codec_driver_shutdown(struct device *dev)
136 struct hda_codec *codec = dev_to_hda_codec(dev);
138 if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
139 codec->patch_ops.reboot_notify(codec);
142 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
143 struct module *owner)
145 drv->core.driver.name = name;
146 drv->core.driver.owner = owner;
147 drv->core.driver.bus = &snd_hda_bus_type;
148 drv->core.driver.probe = hda_codec_driver_probe;
149 drv->core.driver.remove = hda_codec_driver_remove;
150 drv->core.driver.shutdown = hda_codec_driver_shutdown;
151 drv->core.driver.pm = &hda_codec_driver_pm;
152 drv->core.type = HDA_DEV_LEGACY;
153 drv->core.match = hda_codec_match;
154 drv->core.unsol_event = hda_codec_unsol_event;
155 return driver_register(&drv->core.driver);
157 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
159 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
161 driver_unregister(&drv->core.driver);
163 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
165 static inline bool codec_probed(struct hda_codec *codec)
167 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
170 /* try to auto-load and bind the codec module */
171 static void codec_bind_module(struct hda_codec *codec)
174 request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
175 if (codec_probed(codec))
177 request_module("snd-hda-codec-id:%04x*",
178 (codec->core.vendor_id >> 16) & 0xffff);
179 if (codec_probed(codec))
184 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
185 /* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
186 static bool is_likely_hdmi_codec(struct hda_codec *codec)
190 for_each_hda_codec_node(nid, codec) {
191 unsigned int wcaps = get_wcaps(codec, nid);
192 switch (get_wcaps_type(wcaps)) {
194 return false; /* HDMI parser supports only HDMI out */
196 if (!(wcaps & AC_WCAP_DIGITAL))
204 /* no HDMI codec parser support */
205 #define is_likely_hdmi_codec(codec) false
206 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
208 static int codec_bind_generic(struct hda_codec *codec)
213 if (is_likely_hdmi_codec(codec)) {
214 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
215 #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
216 request_module("snd-hda-codec-hdmi");
218 if (codec_probed(codec))
222 codec->probe_id = HDA_CODEC_ID_GENERIC;
223 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
224 request_module("snd-hda-codec-generic");
226 if (codec_probed(codec))
231 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
232 #define is_generic_config(codec) \
233 (codec->modelname && !strcmp(codec->modelname, "generic"))
235 #define is_generic_config(codec) 0
239 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
240 * @codec: the HDA codec
242 * Start parsing of the given codec tree and (re-)initialize the whole
245 * Returns 0 if successful or a negative error code.
247 int snd_hda_codec_configure(struct hda_codec *codec)
251 if (is_generic_config(codec))
252 codec->probe_id = HDA_CODEC_ID_GENERIC;
256 err = snd_hdac_device_register(&codec->core);
261 codec_bind_module(codec);
262 if (!codec->preset) {
263 err = codec_bind_generic(codec);
265 codec_err(codec, "Unable to bind the codec\n");
273 snd_hdac_device_unregister(&codec->core);
276 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);