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 codec->bus->mixer_assigned >= codec->core.addr) {
66 snprintf(codec->card->mixername,
67 sizeof(codec->card->mixername), "%s %s",
68 codec->core.vendor_name, codec->core.chip_name);
69 codec->bus->mixer_assigned = codec->core.addr;
74 EXPORT_SYMBOL_GPL(snd_hda_codec_set_name);
76 static int hda_codec_driver_probe(struct device *dev)
78 struct hda_codec *codec = dev_to_hda_codec(dev);
79 struct module *owner = dev->driver->owner;
82 if (WARN_ON(!codec->preset))
85 err = snd_hda_codec_set_name(codec, codec->preset->name);
88 err = snd_hdac_regmap_init(&codec->core);
92 if (!try_module_get(owner)) {
97 err = codec->preset->patch(codec);
101 err = snd_hda_codec_build_pcms(codec);
104 err = snd_hda_codec_build_controls(codec);
107 if (codec->card->registered) {
108 err = snd_card_register(codec->card);
111 snd_hda_codec_register(codec);
114 codec->core.lazy_cache = true;
121 snd_hda_codec_cleanup_for_unbind(codec);
125 static int hda_codec_driver_remove(struct device *dev)
127 struct hda_codec *codec = dev_to_hda_codec(dev);
129 if (codec->patch_ops.free)
130 codec->patch_ops.free(codec);
131 snd_hda_codec_cleanup_for_unbind(codec);
132 module_put(dev->driver->owner);
136 static void hda_codec_driver_shutdown(struct device *dev)
138 struct hda_codec *codec = dev_to_hda_codec(dev);
140 if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
141 codec->patch_ops.reboot_notify(codec);
144 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
145 struct module *owner)
147 drv->core.driver.name = name;
148 drv->core.driver.owner = owner;
149 drv->core.driver.bus = &snd_hda_bus_type;
150 drv->core.driver.probe = hda_codec_driver_probe;
151 drv->core.driver.remove = hda_codec_driver_remove;
152 drv->core.driver.shutdown = hda_codec_driver_shutdown;
153 drv->core.driver.pm = &hda_codec_driver_pm;
154 drv->core.type = HDA_DEV_LEGACY;
155 drv->core.match = hda_codec_match;
156 drv->core.unsol_event = hda_codec_unsol_event;
157 return driver_register(&drv->core.driver);
159 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
161 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
163 driver_unregister(&drv->core.driver);
165 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
167 static inline bool codec_probed(struct hda_codec *codec)
169 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
172 /* try to auto-load and bind the codec module */
173 static void codec_bind_module(struct hda_codec *codec)
176 request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
177 if (codec_probed(codec))
179 request_module("snd-hda-codec-id:%04x*",
180 (codec->core.vendor_id >> 16) & 0xffff);
181 if (codec_probed(codec))
186 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
187 /* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */
188 static bool is_likely_hdmi_codec(struct hda_codec *codec)
192 for_each_hda_codec_node(nid, codec) {
193 unsigned int wcaps = get_wcaps(codec, nid);
194 switch (get_wcaps_type(wcaps)) {
196 return false; /* HDMI parser supports only HDMI out */
198 if (!(wcaps & AC_WCAP_DIGITAL))
206 /* no HDMI codec parser support */
207 #define is_likely_hdmi_codec(codec) false
208 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
210 static int codec_bind_generic(struct hda_codec *codec)
215 if (is_likely_hdmi_codec(codec)) {
216 codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;
217 #if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)
218 request_module("snd-hda-codec-hdmi");
220 if (codec_probed(codec))
224 codec->probe_id = HDA_CODEC_ID_GENERIC;
225 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
226 request_module("snd-hda-codec-generic");
228 if (codec_probed(codec))
233 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
234 #define is_generic_config(codec) \
235 (codec->modelname && !strcmp(codec->modelname, "generic"))
237 #define is_generic_config(codec) 0
241 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
242 * @codec: the HDA codec
244 * Start parsing of the given codec tree and (re-)initialize the whole
247 * Returns 0 if successful or a negative error code.
249 int snd_hda_codec_configure(struct hda_codec *codec)
253 if (is_generic_config(codec))
254 codec->probe_id = HDA_CODEC_ID_GENERIC;
258 err = snd_hdac_device_register(&codec->core);
263 codec_bind_module(codec);
264 if (!codec->preset) {
265 err = codec_bind_generic(codec);
267 codec_err(codec, "Unable to bind the codec\n");
275 snd_hdac_device_unregister(&codec->core);
278 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);