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