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 u32 mask = preset->mask;
32 if (preset->afg && preset->afg != codec->core.afg)
34 if (preset->mfg && preset->mfg != codec->core.mfg)
38 if (preset->id == (id & mask) &&
39 (!preset->rev || preset->rev == codec->core.revision_id)) {
40 codec->preset = preset;
47 /* process an unsolicited event */
48 static void hda_codec_unsol_event(struct hdac_device *dev, unsigned int ev)
50 struct hda_codec *codec = container_of(dev, struct hda_codec, core);
52 if (codec->patch_ops.unsol_event)
53 codec->patch_ops.unsol_event(codec, ev);
56 /* reset the codec name from the preset */
57 static int codec_refresh_name(struct hda_codec *codec, const char *name)
60 kfree(codec->core.chip_name);
61 codec->core.chip_name = kstrdup(name, GFP_KERNEL);
63 return codec->core.chip_name ? 0 : -ENOMEM;
66 static int hda_codec_driver_probe(struct device *dev)
68 struct hda_codec *codec = dev_to_hda_codec(dev);
69 struct module *owner = dev->driver->owner;
72 if (WARN_ON(!codec->preset))
75 err = codec_refresh_name(codec, codec->preset->name);
78 err = snd_hdac_regmap_init(&codec->core);
82 if (!try_module_get(owner)) {
87 err = codec->preset->patch(codec);
91 err = snd_hda_codec_build_pcms(codec);
94 err = snd_hda_codec_build_controls(codec);
97 if (codec->card->registered) {
98 err = snd_card_register(codec->card);
101 snd_hda_codec_register(codec);
104 codec->core.lazy_cache = true;
111 snd_hda_codec_cleanup_for_unbind(codec);
115 static int hda_codec_driver_remove(struct device *dev)
117 struct hda_codec *codec = dev_to_hda_codec(dev);
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);
126 static void hda_codec_driver_shutdown(struct device *dev)
128 struct hda_codec *codec = dev_to_hda_codec(dev);
130 if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
131 codec->patch_ops.reboot_notify(codec);
134 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,
135 struct module *owner)
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);
149 EXPORT_SYMBOL_GPL(__hda_codec_driver_register);
151 void hda_codec_driver_unregister(struct hda_codec_driver *drv)
153 driver_unregister(&drv->core.driver);
155 EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);
157 static inline bool codec_probed(struct hda_codec *codec)
159 return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;
162 /* try to auto-load and bind the codec module */
163 static void codec_bind_module(struct hda_codec *codec)
166 request_module("snd-hda-codec-id:%08x", codec->core.vendor_id);
167 if (codec_probed(codec))
169 request_module("snd-hda-codec-id:%04x*",
170 (codec->core.vendor_id >> 16) & 0xffff);
171 if (codec_probed(codec))
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)
182 for_each_hda_codec_node(nid, codec) {
183 unsigned int wcaps = get_wcaps(codec, nid);
184 switch (get_wcaps_type(wcaps)) {
186 return false; /* HDMI parser supports only HDMI out */
188 if (!(wcaps & AC_WCAP_DIGITAL))
196 /* no HDMI codec parser support */
197 #define is_likely_hdmi_codec(codec) false
198 #endif /* CONFIG_SND_HDA_CODEC_HDMI */
200 static int codec_bind_generic(struct hda_codec *codec)
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");
210 if (codec_probed(codec))
214 codec->probe_id = HDA_CODEC_ID_GENERIC;
215 #if IS_MODULE(CONFIG_SND_HDA_GENERIC)
216 request_module("snd-hda-codec-generic");
218 if (codec_probed(codec))
223 #if IS_ENABLED(CONFIG_SND_HDA_GENERIC)
224 #define is_generic_config(codec) \
225 (codec->modelname && !strcmp(codec->modelname, "generic"))
227 #define is_generic_config(codec) 0
231 * snd_hda_codec_configure - (Re-)configure the HD-audio codec
232 * @codec: the HDA codec
234 * Start parsing of the given codec tree and (re-)initialize the whole
237 * Returns 0 if successful or a negative error code.
239 int snd_hda_codec_configure(struct hda_codec *codec)
243 if (is_generic_config(codec))
244 codec->probe_id = HDA_CODEC_ID_GENERIC;
248 err = snd_hdac_device_register(&codec->core);
253 codec_bind_module(codec);
254 if (!codec->preset) {
255 err = codec_bind_generic(codec);
257 codec_err(codec, "Unable to bind the codec\n");
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);
270 snd_hdac_device_unregister(&codec->core);
273 EXPORT_SYMBOL_GPL(snd_hda_codec_configure);