1 ============================= 1 =============================
2 More Notes on HD-Audio Driver 2 More Notes on HD-Audio Driver
3 ============================= 3 =============================
4 4
5 Takashi Iwai <tiwai@suse.de> 5 Takashi Iwai <tiwai@suse.de>
6 6
7 7
8 General 8 General
9 ======= 9 =======
10 10
11 HD-audio is the new standard on-board audio co 11 HD-audio is the new standard on-board audio component on modern PCs
12 after AC97. Although Linux has been supportin 12 after AC97. Although Linux has been supporting HD-audio since long
13 time ago, there are often problems with new ma 13 time ago, there are often problems with new machines. A part of the
14 problem is broken BIOS, and the rest is the dr 14 problem is broken BIOS, and the rest is the driver implementation.
15 This document explains the brief trouble-shoot 15 This document explains the brief trouble-shooting and debugging
16 methods for the HD-audio hardware. 16 methods for the HD-audio hardware.
17 17
18 The HD-audio component consists of two parts: !! 18 The HD-audio component consists of two parts: the controller chip and
19 the codec chips on the HD-audio bus. Linux pr 19 the codec chips on the HD-audio bus. Linux provides a single driver
20 for all controllers, snd-hda-intel. Although 20 for all controllers, snd-hda-intel. Although the driver name contains
21 a word of a well-known hardware vendor, it's n 21 a word of a well-known hardware vendor, it's not specific to it but for
22 all controller chips by other companies. Sinc 22 all controller chips by other companies. Since the HD-audio
23 controllers are supposed to be compatible, the 23 controllers are supposed to be compatible, the single snd-hda-driver
24 should work in most cases. But, not surprisin 24 should work in most cases. But, not surprisingly, there are known
25 bugs and issues specific to each controller ty 25 bugs and issues specific to each controller type. The snd-hda-intel
26 driver has a bunch of workarounds for these as 26 driver has a bunch of workarounds for these as described below.
27 27
28 A controller may have multiple codecs. Usuall 28 A controller may have multiple codecs. Usually you have one audio
29 codec and optionally one modem codec. In theo 29 codec and optionally one modem codec. In theory, there might be
30 multiple audio codecs, e.g. for analog and dig 30 multiple audio codecs, e.g. for analog and digital outputs, and the
31 driver might not work properly because of conf 31 driver might not work properly because of conflict of mixer elements.
32 This should be fixed in future if such hardwar 32 This should be fixed in future if such hardware really exists.
33 33
34 The snd-hda-intel driver has several different 34 The snd-hda-intel driver has several different codec parsers depending
35 on the codec. It has a generic parser as a fa 35 on the codec. It has a generic parser as a fallback, but this
36 functionality is fairly limited until now. In 36 functionality is fairly limited until now. Instead of the generic
37 parser, usually the codec-specific parser (cod 37 parser, usually the codec-specific parser (coded in patch_*.c) is used
38 for the codec-specific implementations. The d 38 for the codec-specific implementations. The details about the
39 codec-specific problems are explained in the l 39 codec-specific problems are explained in the later sections.
40 40
41 If you are interested in the deep debugging of 41 If you are interested in the deep debugging of HD-audio, read the
42 HD-audio specification at first. The specific 42 HD-audio specification at first. The specification is found on
43 Intel's web page, for example: 43 Intel's web page, for example:
44 44
45 * https://www.intel.com/standards/hdaudio/ !! 45 * http://www.intel.com/standards/hdaudio/
46 46
47 47
48 HD-Audio Controller 48 HD-Audio Controller
49 =================== 49 ===================
50 50
51 DMA-Position Problem 51 DMA-Position Problem
52 -------------------- 52 --------------------
53 The most common problem of the controller is t 53 The most common problem of the controller is the inaccurate DMA
54 pointer reporting. The DMA pointer for playba 54 pointer reporting. The DMA pointer for playback and capture can be
55 read in two ways, either via a LPIB register o 55 read in two ways, either via a LPIB register or via a position-buffer
56 map. As default the driver tries to read from 56 map. As default the driver tries to read from the io-mapped
57 position-buffer, and falls back to LPIB if the 57 position-buffer, and falls back to LPIB if the position-buffer appears
58 dead. However, this detection isn't perfect o 58 dead. However, this detection isn't perfect on some devices. In such
59 a case, you can change the default method via 59 a case, you can change the default method via ``position_fix`` option.
60 60
61 ``position_fix=1`` means to use LPIB method ex 61 ``position_fix=1`` means to use LPIB method explicitly.
62 ``position_fix=2`` means to use the position-b 62 ``position_fix=2`` means to use the position-buffer.
63 ``position_fix=3`` means to use a combination 63 ``position_fix=3`` means to use a combination of both methods, needed
64 for some VIA controllers. The capture stream 64 for some VIA controllers. The capture stream position is corrected
65 by comparing both LPIB and position-buffer val 65 by comparing both LPIB and position-buffer values.
66 ``position_fix=4`` is another combination avai 66 ``position_fix=4`` is another combination available for all controllers,
67 and uses LPIB for the playback and the positio 67 and uses LPIB for the playback and the position-buffer for the capture
68 streams. 68 streams.
69 ``position_fix=5`` is specific to Intel platfo <<
70 and onward. It applies the delay calculation <<
71 reporting. <<
72 ``position_fix=6`` is to correct the position <<
73 size, mainly targeted for the recent AMD contr <<
74 0 is the default value for all other 69 0 is the default value for all other
75 controllers, the automatic check and fallback 70 controllers, the automatic check and fallback to LPIB as described in
76 the above. If you get a problem of repeated s 71 the above. If you get a problem of repeated sounds, this option might
77 help. 72 help.
78 73
79 In addition to that, every controller is known 74 In addition to that, every controller is known to be broken regarding
80 the wake-up timing. It wakes up a few samples 75 the wake-up timing. It wakes up a few samples before actually
81 processing the data on the buffer. This cause 76 processing the data on the buffer. This caused a lot of problems, for
82 example, with ALSA dmix or JACK. Since 2.6.27 77 example, with ALSA dmix or JACK. Since 2.6.27 kernel, the driver puts
83 an artificial delay to the wake up timing. Th 78 an artificial delay to the wake up timing. This delay is controlled
84 via ``bdl_pos_adj`` option. !! 79 via ``bdl_pos_adj`` option.
85 80
86 When ``bdl_pos_adj`` is a negative value (as d 81 When ``bdl_pos_adj`` is a negative value (as default), it's assigned to
87 an appropriate value depending on the controll 82 an appropriate value depending on the controller chip. For Intel
88 chips, it'd be 1 while it'd be 32 for others. 83 chips, it'd be 1 while it'd be 32 for others. Usually this works.
89 Only in case it doesn't work and you get warni 84 Only in case it doesn't work and you get warning messages, you should
90 change this parameter to other values. 85 change this parameter to other values.
91 86
92 87
93 Codec-Probing Problem 88 Codec-Probing Problem
94 --------------------- 89 ---------------------
95 A less often but a more severe problem is the 90 A less often but a more severe problem is the codec probing. When
96 BIOS reports the available codec slots wrongly 91 BIOS reports the available codec slots wrongly, the driver gets
97 confused and tries to access the non-existing 92 confused and tries to access the non-existing codec slot. This often
98 results in the total screw-up, and destructs t 93 results in the total screw-up, and destructs the further communication
99 with the codec chips. The symptom appears usu 94 with the codec chips. The symptom appears usually as error messages
100 like: 95 like:
101 :: 96 ::
102 97
103 hda_intel: azx_get_response timeout, switc 98 hda_intel: azx_get_response timeout, switching to polling mode:
104 last cmd=0x12345678 99 last cmd=0x12345678
105 hda_intel: azx_get_response timeout, switc 100 hda_intel: azx_get_response timeout, switching to single_cmd mode:
106 last cmd=0x12345678 101 last cmd=0x12345678
107 102
108 The first line is a warning, and this is usual 103 The first line is a warning, and this is usually relatively harmless.
109 It means that the codec response isn't notifie 104 It means that the codec response isn't notified via an IRQ. The
110 driver uses explicit polling method to read th 105 driver uses explicit polling method to read the response. It gives
111 very slight CPU overhead, but you'd unlikely n 106 very slight CPU overhead, but you'd unlikely notice it.
112 107
113 The second line is, however, a fatal error. I 108 The second line is, however, a fatal error. If this happens, usually
114 it means that something is really wrong. Most 109 it means that something is really wrong. Most likely you are
115 accessing a non-existing codec slot. 110 accessing a non-existing codec slot.
116 111
117 Thus, if the second error message appears, try 112 Thus, if the second error message appears, try to narrow the probed
118 codec slots via ``probe_mask`` option. It's a 113 codec slots via ``probe_mask`` option. It's a bitmask, and each bit
119 corresponds to the codec slot. For example, t 114 corresponds to the codec slot. For example, to probe only the first
120 slot, pass ``probe_mask=1``. For the first an 115 slot, pass ``probe_mask=1``. For the first and the third slots, pass
121 ``probe_mask=5`` (where 5 = 1 | 4), and so on. 116 ``probe_mask=5`` (where 5 = 1 | 4), and so on.
122 117
123 Since 2.6.29 kernel, the driver has a more rob 118 Since 2.6.29 kernel, the driver has a more robust probing method, so
124 this error might happen rarely, though. 119 this error might happen rarely, though.
125 120
126 On a machine with a broken BIOS, sometimes you 121 On a machine with a broken BIOS, sometimes you need to force the
127 driver to probe the codec slots the hardware d 122 driver to probe the codec slots the hardware doesn't report for use.
128 In such a case, turn the bit 8 (0x100) of ``pr 123 In such a case, turn the bit 8 (0x100) of ``probe_mask`` option on.
129 Then the rest 8 bits are passed as the codec s 124 Then the rest 8 bits are passed as the codec slots to probe
130 unconditionally. For example, ``probe_mask=0x 125 unconditionally. For example, ``probe_mask=0x103`` will force to probe
131 the codec slots 0 and 1 no matter what the har 126 the codec slots 0 and 1 no matter what the hardware reports.
132 127
133 128
134 Interrupt Handling 129 Interrupt Handling
135 ------------------ 130 ------------------
136 HD-audio driver uses MSI as default (if availa 131 HD-audio driver uses MSI as default (if available) since 2.6.33
137 kernel as MSI works better on some machines, a 132 kernel as MSI works better on some machines, and in general, it's
138 better for performance. However, Nvidia contr 133 better for performance. However, Nvidia controllers showed bad
139 regressions with MSI (especially in a combinat 134 regressions with MSI (especially in a combination with AMD chipset),
140 thus we disabled MSI for them. 135 thus we disabled MSI for them.
141 136
142 There seem also still other devices that don't 137 There seem also still other devices that don't work with MSI. If you
143 see a regression wrt the sound quality (stutte 138 see a regression wrt the sound quality (stuttering, etc) or a lock-up
144 in the recent kernel, try to pass ``enable_msi 139 in the recent kernel, try to pass ``enable_msi=0`` option to disable
145 MSI. If it works, you can add the known bad d 140 MSI. If it works, you can add the known bad device to the blacklist
146 defined in hda_intel.c. In such a case, pleas 141 defined in hda_intel.c. In such a case, please report and give the
147 patch back to the upstream developer. !! 142 patch back to the upstream developer.
148 143
149 144
150 HD-Audio Codec 145 HD-Audio Codec
151 ============== 146 ==============
152 147
153 Model Option 148 Model Option
154 ------------ 149 ------------
155 The most common problem regarding the HD-audio 150 The most common problem regarding the HD-audio driver is the
156 unsupported codec features or the mismatched d 151 unsupported codec features or the mismatched device configuration.
157 Most of codec-specific code has several preset 152 Most of codec-specific code has several preset models, either to
158 override the BIOS setup or to provide more com 153 override the BIOS setup or to provide more comprehensive features.
159 154
160 The driver checks PCI SSID and looks through t 155 The driver checks PCI SSID and looks through the static configuration
161 table until any matching entry is found. If y 156 table until any matching entry is found. If you have a new machine,
162 you may see a message like below: 157 you may see a message like below:
163 :: 158 ::
164 159
165 hda_codec: ALC880: BIOS auto-probing. 160 hda_codec: ALC880: BIOS auto-probing.
166 161
167 Meanwhile, in the earlier versions, you would 162 Meanwhile, in the earlier versions, you would see a message like:
168 :: 163 ::
169 164
170 hda_codec: Unknown model for ALC880, tryin 165 hda_codec: Unknown model for ALC880, trying auto-probe from BIOS...
171 166
172 Even if you see such a message, DON'T PANIC. 167 Even if you see such a message, DON'T PANIC. Take a deep breath and
173 keep your towel. First of all, it's an inform 168 keep your towel. First of all, it's an informational message, no
174 warning, no error. This means that the PCI SS 169 warning, no error. This means that the PCI SSID of your device isn't
175 listed in the known preset model (white-)list. 170 listed in the known preset model (white-)list. But, this doesn't mean
176 that the driver is broken. Many codec-drivers 171 that the driver is broken. Many codec-drivers provide the automatic
177 configuration mechanism based on the BIOS setu 172 configuration mechanism based on the BIOS setup.
178 173
179 The HD-audio codec has usually "pin" widgets, 174 The HD-audio codec has usually "pin" widgets, and BIOS sets the default
180 configuration of each pin, which indicates the 175 configuration of each pin, which indicates the location, the
181 connection type, the jack color, etc. The HD- 176 connection type, the jack color, etc. The HD-audio driver can guess
182 the right connection judging from these defaul 177 the right connection judging from these default configuration values.
183 However -- some codec-support codes, such as p 178 However -- some codec-support codes, such as patch_analog.c, don't
184 support the automatic probing (yet as of 2.6.2 179 support the automatic probing (yet as of 2.6.28). And, BIOS is often,
185 yes, pretty often broken. It sets up wrong va 180 yes, pretty often broken. It sets up wrong values and screws up the
186 driver. 181 driver.
187 182
188 The preset model (or recently called as "fix-u 183 The preset model (or recently called as "fix-up") is provided
189 basically to overcome such a situation. When 184 basically to overcome such a situation. When the matching preset
190 model is found in the white-list, the driver a 185 model is found in the white-list, the driver assumes the static
191 configuration of that preset with the correct 186 configuration of that preset with the correct pin setup, etc.
192 Thus, if you have a newer machine with a sligh 187 Thus, if you have a newer machine with a slightly different PCI SSID
193 (or codec SSID) from the existing one, you may 188 (or codec SSID) from the existing one, you may have a good chance to
194 re-use the same model. You can pass the ``mod 189 re-use the same model. You can pass the ``model`` option to specify the
195 preset model instead of PCI (and codec-) SSID 190 preset model instead of PCI (and codec-) SSID look-up.
196 191
197 What ``model`` option values are available dep 192 What ``model`` option values are available depends on the codec chip.
198 Check your codec chip from the codec proc file 193 Check your codec chip from the codec proc file (see "Codec Proc-File"
199 section below). It will show the vendor/produ 194 section below). It will show the vendor/product name of your codec
200 chip. Then, see Documentation/sound/hd-audio/ 195 chip. Then, see Documentation/sound/hd-audio/models.rst file,
201 the section of HD-audio driver. You can find 196 the section of HD-audio driver. You can find a list of codecs
202 and ``model`` options belonging to each codec. 197 and ``model`` options belonging to each codec. For example, for Realtek
203 ALC262 codec chip, pass ``model=ultra`` for de 198 ALC262 codec chip, pass ``model=ultra`` for devices that are compatible
204 with Samsung Q1 Ultra. 199 with Samsung Q1 Ultra.
205 200
206 Thus, the first thing you can do for any brand 201 Thus, the first thing you can do for any brand-new, unsupported and
207 non-working HD-audio hardware is to check HD-a 202 non-working HD-audio hardware is to check HD-audio codec and several
208 different ``model`` option values. If you hav 203 different ``model`` option values. If you have any luck, some of them
209 might suit with your device well. 204 might suit with your device well.
210 205
211 There are a few special model option values: 206 There are a few special model option values:
212 207
213 * when 'nofixup' is passed, the device-specifi 208 * when 'nofixup' is passed, the device-specific fixups in the codec
214 parser are skipped. 209 parser are skipped.
215 * when ``generic`` is passed, the codec-specif 210 * when ``generic`` is passed, the codec-specific parser is skipped and
216 only the generic parser is used. 211 only the generic parser is used.
217 212
218 A new style for the model option that was intr <<
219 is to pass the PCI or codec SSID in the form o <<
220 where XXXX and YYYY are the sub-vendor and sub <<
221 numbers, respectively. This is a kind of alia <<
222 when this form is given, the driver will refer <<
223 reference to the quirk table. It'd be useful <<
224 target quirk isn't listed in the model table. <<
225 model=103c:8862 will apply the quirk for HP Pr <<
226 isn't found in the model table as of writing) <<
227 handled equivalently by the same driver. <<
228 <<
229 213
230 Speaker and Headphone Output 214 Speaker and Headphone Output
231 ---------------------------- 215 ----------------------------
232 One of the most frequent (and obvious) bugs wi 216 One of the most frequent (and obvious) bugs with HD-audio is the
233 silent output from either or both of a built-i 217 silent output from either or both of a built-in speaker and a
234 headphone jack. In general, you should try a 218 headphone jack. In general, you should try a headphone output at
235 first. A speaker output often requires more a 219 first. A speaker output often requires more additional controls like
236 the external amplifier bits. Thus a headphone 220 the external amplifier bits. Thus a headphone output has a slightly
237 better chance. 221 better chance.
238 222
239 Before making a bug report, double-check wheth 223 Before making a bug report, double-check whether the mixer is set up
240 correctly. The recent version of snd-hda-inte 224 correctly. The recent version of snd-hda-intel driver provides mostly
241 "Master" volume control as well as "Front" vol 225 "Master" volume control as well as "Front" volume (where Front
242 indicates the front-channels). In addition, t 226 indicates the front-channels). In addition, there can be individual
243 "Headphone" and "Speaker" controls. 227 "Headphone" and "Speaker" controls.
244 228
245 Ditto for the speaker output. There can be "E 229 Ditto for the speaker output. There can be "External Amplifier"
246 switch on some codecs. Turn on this if presen 230 switch on some codecs. Turn on this if present.
247 231
248 Another related problem is the automatic mute 232 Another related problem is the automatic mute of speaker output by
249 headphone plugging. This feature is implement 233 headphone plugging. This feature is implemented in most cases, but
250 not on every preset model or codec-support cod 234 not on every preset model or codec-support code.
251 235
252 In anyway, try a different model option if you 236 In anyway, try a different model option if you have such a problem.
253 Some other models may match better and give yo 237 Some other models may match better and give you more matching
254 functionality. If none of the available model 238 functionality. If none of the available models works, send a bug
255 report. See the bug report section for detail 239 report. See the bug report section for details.
256 240
257 If you are masochistic enough to debug the dri 241 If you are masochistic enough to debug the driver problem, note the
258 following: 242 following:
259 243
260 * The speaker (and the headphone, too) output 244 * The speaker (and the headphone, too) output often requires the
261 external amplifier. This can be set usually 245 external amplifier. This can be set usually via EAPD verb or a
262 certain GPIO. If the codec pin supports EAP 246 certain GPIO. If the codec pin supports EAPD, you have a better
263 chance via SET_EAPD_BTL verb (0x70c). On ot 247 chance via SET_EAPD_BTL verb (0x70c). On others, GPIO pin (mostly
264 it's either GPIO0 or GPIO1) may turn on/off 248 it's either GPIO0 or GPIO1) may turn on/off EAPD.
265 * Some Realtek codecs require special vendor-s 249 * Some Realtek codecs require special vendor-specific coefficients to
266 turn on the amplifier. See patch_realtek.c. 250 turn on the amplifier. See patch_realtek.c.
267 * IDT codecs may have extra power-enable/disab 251 * IDT codecs may have extra power-enable/disable controls on each
268 analog pin. See patch_sigmatel.c. 252 analog pin. See patch_sigmatel.c.
269 * Very rare but some devices don't accept the 253 * Very rare but some devices don't accept the pin-detection verb until
270 triggered. Issuing GET_PIN_SENSE verb (0xf0 254 triggered. Issuing GET_PIN_SENSE verb (0xf09) may result in the
271 codec-communication stall. Some examples ar 255 codec-communication stall. Some examples are found in
272 patch_realtek.c. 256 patch_realtek.c.
273 257
274 258
275 Capture Problems 259 Capture Problems
276 ---------------- 260 ----------------
277 The capture problems are often because of miss 261 The capture problems are often because of missing setups of mixers.
278 Thus, before submitting a bug report, make sur 262 Thus, before submitting a bug report, make sure that you set up the
279 mixer correctly. For example, both "Capture V 263 mixer correctly. For example, both "Capture Volume" and "Capture
280 Switch" have to be set properly in addition to 264 Switch" have to be set properly in addition to the right "Capture
281 Source" or "Input Source" selection. Some dev 265 Source" or "Input Source" selection. Some devices have "Mic Boost"
282 volume or switch. 266 volume or switch.
283 267
284 When the PCM device is opened via "default" PC 268 When the PCM device is opened via "default" PCM (without pulse-audio
285 plugin), you'll likely have "Digital Capture V 269 plugin), you'll likely have "Digital Capture Volume" control as well.
286 This is provided for the extra gain/attenuatio 270 This is provided for the extra gain/attenuation of the signal in
287 software, especially for the inputs without th 271 software, especially for the inputs without the hardware volume
288 control such as digital microphones. Unless r 272 control such as digital microphones. Unless really needed, this
289 should be set to exactly 50%, corresponding to 273 should be set to exactly 50%, corresponding to 0dB -- neither extra
290 gain nor attenuation. When you use "hw" PCM, 274 gain nor attenuation. When you use "hw" PCM, i.e., a raw access PCM,
291 this control will have no influence, though. 275 this control will have no influence, though.
292 276
293 It's known that some codecs / devices have fai 277 It's known that some codecs / devices have fairly bad analog circuits,
294 and the recorded sound contains a certain DC-o 278 and the recorded sound contains a certain DC-offset. This is no bug
295 of the driver. 279 of the driver.
296 280
297 Most of modern laptops have no analog CD-input 281 Most of modern laptops have no analog CD-input connection. Thus, the
298 recording from CD input won't work in many cas 282 recording from CD input won't work in many cases although the driver
299 provides it as the capture source. Use CDDA i 283 provides it as the capture source. Use CDDA instead.
300 284
301 The automatic switching of the built-in and ex 285 The automatic switching of the built-in and external mic per plugging
302 is implemented on some codec models but not on 286 is implemented on some codec models but not on every model. Partly
303 because of my laziness but mostly lack of test 287 because of my laziness but mostly lack of testers. Feel free to
304 submit the improvement patch to the author. 288 submit the improvement patch to the author.
305 289
306 290
307 Direct Debugging 291 Direct Debugging
308 ---------------- 292 ----------------
309 If no model option gives you a better result, 293 If no model option gives you a better result, and you are a tough guy
310 to fight against evil, try debugging via hitti 294 to fight against evil, try debugging via hitting the raw HD-audio
311 codec verbs to the device. Some tools are ava 295 codec verbs to the device. Some tools are available: hda-emu and
312 hda-analyzer. The detailed description is fou 296 hda-analyzer. The detailed description is found in the sections
313 below. You'd need to enable hwdep for using t 297 below. You'd need to enable hwdep for using these tools. See "Kernel
314 Configuration" section. 298 Configuration" section.
315 299
316 300
317 Other Issues 301 Other Issues
318 ============ 302 ============
319 303
320 Kernel Configuration 304 Kernel Configuration
321 -------------------- 305 --------------------
322 In general, I recommend you to enable the soun 306 In general, I recommend you to enable the sound debug option,
323 ``CONFIG_SND_DEBUG=y``, no matter whether you 307 ``CONFIG_SND_DEBUG=y``, no matter whether you are debugging or not.
>> 308 This enables snd_printd() macro and others, and you'll get additional
>> 309 kernel messages at probing.
>> 310
>> 311 In addition, you can enable ``CONFIG_SND_DEBUG_VERBOSE=y``. But this
>> 312 will give you far more messages. Thus turn this on only when you are
>> 313 sure to want it.
324 314
325 Don't forget to turn on the appropriate ``CONF 315 Don't forget to turn on the appropriate ``CONFIG_SND_HDA_CODEC_*``
326 options. Note that each of them corresponds t 316 options. Note that each of them corresponds to the codec chip, not
327 the controller chip. Thus, even if lspci show 317 the controller chip. Thus, even if lspci shows the Nvidia controller,
328 you may need to choose the option for other ve 318 you may need to choose the option for other vendors. If you are
329 unsure, just select all yes. 319 unsure, just select all yes.
330 320
331 ``CONFIG_SND_HDA_HWDEP`` is a useful option fo 321 ``CONFIG_SND_HDA_HWDEP`` is a useful option for debugging the driver.
332 When this is enabled, the driver creates hardw 322 When this is enabled, the driver creates hardware-dependent devices
333 (one per each codec), and you have a raw acces 323 (one per each codec), and you have a raw access to the device via
334 these device files. For example, ``hwC0D2`` w 324 these device files. For example, ``hwC0D2`` will be created for the
335 codec slot #2 of the first card (#0). For deb 325 codec slot #2 of the first card (#0). For debug-tools such as
336 hda-verb and hda-analyzer, the hwdep device ha 326 hda-verb and hda-analyzer, the hwdep device has to be enabled.
337 Thus, it'd be better to turn this on always. 327 Thus, it'd be better to turn this on always.
338 328
339 ``CONFIG_SND_HDA_RECONFIG`` is a new option, a 329 ``CONFIG_SND_HDA_RECONFIG`` is a new option, and this depends on the
340 hwdep option above. When enabled, you'll have 330 hwdep option above. When enabled, you'll have some sysfs files under
341 the corresponding hwdep directory. See "HD-au 331 the corresponding hwdep directory. See "HD-audio reconfiguration"
342 section below. 332 section below.
343 333
344 ``CONFIG_SND_HDA_POWER_SAVE`` option enables t 334 ``CONFIG_SND_HDA_POWER_SAVE`` option enables the power-saving feature.
345 See "Power-saving" section below. 335 See "Power-saving" section below.
346 336
347 337
348 Codec Proc-File 338 Codec Proc-File
349 --------------- 339 ---------------
350 The codec proc-file is a treasure-chest for de 340 The codec proc-file is a treasure-chest for debugging HD-audio.
351 It shows most of useful information of each co 341 It shows most of useful information of each codec widget.
352 342
353 The proc file is located in /proc/asound/card* 343 The proc file is located in /proc/asound/card*/codec#*, one file per
354 each codec slot. You can know the codec vendo 344 each codec slot. You can know the codec vendor, product id and
355 names, the type of each widget, capabilities a 345 names, the type of each widget, capabilities and so on.
356 This file, however, doesn't show the jack sens 346 This file, however, doesn't show the jack sensing state, so far. This
357 is because the jack-sensing might be depending 347 is because the jack-sensing might be depending on the trigger state.
358 348
359 This file will be picked up by the debug tools 349 This file will be picked up by the debug tools, and also it can be fed
360 to the emulator as the primary codec informati 350 to the emulator as the primary codec information. See the debug tools
361 section below. 351 section below.
362 352
363 This proc file can be also used to check wheth 353 This proc file can be also used to check whether the generic parser is
364 used. When the generic parser is used, the ve 354 used. When the generic parser is used, the vendor/product ID name
365 will appear as "Realtek ID 0262", instead of " 355 will appear as "Realtek ID 0262", instead of "Realtek ALC262".
366 356
367 357
368 HD-Audio Reconfiguration 358 HD-Audio Reconfiguration
369 ------------------------ 359 ------------------------
370 This is an experimental feature to allow you r 360 This is an experimental feature to allow you re-configure the HD-audio
371 codec dynamically without reloading the driver 361 codec dynamically without reloading the driver. The following sysfs
372 files are available under each codec-hwdep dev !! 362 files are available under each codec-hwdep device directory (e.g.
373 /sys/class/sound/hwC0D0): 363 /sys/class/sound/hwC0D0):
374 364
375 vendor_id 365 vendor_id
376 Shows the 32bit codec vendor-id hex number 366 Shows the 32bit codec vendor-id hex number. You can change the
377 vendor-id value by writing to this file. 367 vendor-id value by writing to this file.
378 subsystem_id 368 subsystem_id
379 Shows the 32bit codec subsystem-id hex num 369 Shows the 32bit codec subsystem-id hex number. You can change the
380 subsystem-id value by writing to this file 370 subsystem-id value by writing to this file.
381 revision_id 371 revision_id
382 Shows the 32bit codec revision-id hex numb 372 Shows the 32bit codec revision-id hex number. You can change the
383 revision-id value by writing to this file. 373 revision-id value by writing to this file.
384 afg 374 afg
385 Shows the AFG ID. This is read-only. 375 Shows the AFG ID. This is read-only.
386 mfg 376 mfg
387 Shows the MFG ID. This is read-only. 377 Shows the MFG ID. This is read-only.
388 name 378 name
389 Shows the codec name string. Can be chang 379 Shows the codec name string. Can be changed by writing to this
390 file. 380 file.
391 modelname 381 modelname
392 Shows the currently set ``model`` option. 382 Shows the currently set ``model`` option. Can be changed by writing
393 to this file. 383 to this file.
394 init_verbs 384 init_verbs
395 The extra verbs to execute at initializati 385 The extra verbs to execute at initialization. You can add a verb by
396 writing to this file. Pass three numbers: 386 writing to this file. Pass three numbers: nid, verb and parameter
397 (separated with a space). 387 (separated with a space).
398 hints 388 hints
399 Shows / stores hint strings for codec pars 389 Shows / stores hint strings for codec parsers for any use.
400 Its format is ``key = value``. For exampl 390 Its format is ``key = value``. For example, passing ``jack_detect = no``
401 will disable the jack detection of the mac 391 will disable the jack detection of the machine completely.
402 init_pin_configs 392 init_pin_configs
403 Shows the initial pin default config value 393 Shows the initial pin default config values set by BIOS.
404 driver_pin_configs 394 driver_pin_configs
405 Shows the pin default values set by the co 395 Shows the pin default values set by the codec parser explicitly.
406 This doesn't show all pin values but only 396 This doesn't show all pin values but only the changed values by
407 the parser. That is, if the parser doesn' 397 the parser. That is, if the parser doesn't change the pin default
408 config values by itself, this will contain 398 config values by itself, this will contain nothing.
409 user_pin_configs 399 user_pin_configs
410 Shows the pin default config values to ove 400 Shows the pin default config values to override the BIOS setup.
411 Writing this (with two numbers, NID and va 401 Writing this (with two numbers, NID and value) appends the new
412 value. The given will be used instead of 402 value. The given will be used instead of the initial BIOS value at
413 the next reconfiguration time. Note that 403 the next reconfiguration time. Note that this config will override
414 even the driver pin configs, too. 404 even the driver pin configs, too.
415 reconfig 405 reconfig
416 Triggers the codec re-configuration. When 406 Triggers the codec re-configuration. When any value is written to
417 this file, the driver re-initialize and pa 407 this file, the driver re-initialize and parses the codec tree
418 again. All the changes done by the sysfs 408 again. All the changes done by the sysfs entries above are taken
419 into account. 409 into account.
420 clear 410 clear
421 Resets the codec, removes the mixer elemen 411 Resets the codec, removes the mixer elements and PCM stuff of the
422 specified codec, and clear all init verbs 412 specified codec, and clear all init verbs and hints.
423 413
424 For example, when you want to change the pin d 414 For example, when you want to change the pin default configuration
425 value of the pin widget 0x14 to 0x9993013f, an 415 value of the pin widget 0x14 to 0x9993013f, and let the driver
426 re-configure based on that state, run like bel 416 re-configure based on that state, run like below:
427 :: 417 ::
428 418
429 # echo 0x14 0x9993013f > /sys/class/sound/ 419 # echo 0x14 0x9993013f > /sys/class/sound/hwC0D0/user_pin_configs
430 # echo 1 > /sys/class/sound/hwC0D0/reconfi !! 420 # echo 1 > /sys/class/sound/hwC0D0/reconfig
431 421
432 422
433 Hint Strings 423 Hint Strings
434 ------------ 424 ------------
435 The codec parser have several switches and adj 425 The codec parser have several switches and adjustment knobs for
436 matching better with the actual codec or devic 426 matching better with the actual codec or device behavior. Many of
437 them can be adjusted dynamically via "hints" s 427 them can be adjusted dynamically via "hints" strings as mentioned in
438 the section above. For example, by passing `` 428 the section above. For example, by passing ``jack_detect = no`` string
439 via sysfs or a patch file, you can disable the 429 via sysfs or a patch file, you can disable the jack detection, thus
440 the codec parser will skip the features like a 430 the codec parser will skip the features like auto-mute or mic
441 auto-switch. As a boolean value, either ``yes 431 auto-switch. As a boolean value, either ``yes``, ``no``, ``true``, ``false``,
442 ``1`` or ``0`` can be passed. 432 ``1`` or ``0`` can be passed.
443 433
444 The generic parser supports the following hint 434 The generic parser supports the following hints:
445 435
446 jack_detect (bool) 436 jack_detect (bool)
447 specify whether the jack detection is avai 437 specify whether the jack detection is available at all on this
448 machine; default true 438 machine; default true
449 inv_jack_detect (bool) 439 inv_jack_detect (bool)
450 indicates that the jack detection logic is 440 indicates that the jack detection logic is inverted
451 trigger_sense (bool) 441 trigger_sense (bool)
452 indicates that the jack detection needs th 442 indicates that the jack detection needs the explicit call of
453 AC_VERB_SET_PIN_SENSE verb 443 AC_VERB_SET_PIN_SENSE verb
454 inv_eapd (bool) 444 inv_eapd (bool)
455 indicates that the EAPD is implemented in 445 indicates that the EAPD is implemented in the inverted logic
456 pcm_format_first (bool) 446 pcm_format_first (bool)
457 sets the PCM format before the stream tag 447 sets the PCM format before the stream tag and channel ID
458 sticky_stream (bool) 448 sticky_stream (bool)
459 keep the PCM format, stream tag and ID as 449 keep the PCM format, stream tag and ID as long as possible;
460 default true 450 default true
461 spdif_status_reset (bool) 451 spdif_status_reset (bool)
462 reset the SPDIF status bits at each time t 452 reset the SPDIF status bits at each time the SPDIF stream is set
463 up 453 up
464 pin_amp_workaround (bool) 454 pin_amp_workaround (bool)
465 the output pin may have multiple amp value 455 the output pin may have multiple amp values
466 single_adc_amp (bool) 456 single_adc_amp (bool)
467 ADCs can have only single input amps 457 ADCs can have only single input amps
468 auto_mute (bool) 458 auto_mute (bool)
469 enable/disable the headphone auto-mute fea 459 enable/disable the headphone auto-mute feature; default true
470 auto_mic (bool) 460 auto_mic (bool)
471 enable/disable the mic auto-switch feature 461 enable/disable the mic auto-switch feature; default true
472 line_in_auto_switch (bool) 462 line_in_auto_switch (bool)
473 enable/disable the line-in auto-switch fea 463 enable/disable the line-in auto-switch feature; default false
474 need_dac_fix (bool) 464 need_dac_fix (bool)
475 limits the DACs depending on the channel c 465 limits the DACs depending on the channel count
476 primary_hp (bool) 466 primary_hp (bool)
477 probe headphone jacks as the primary outpu 467 probe headphone jacks as the primary outputs; default true
478 multi_io (bool) 468 multi_io (bool)
479 try probing multi-I/O config (e.g. shared 469 try probing multi-I/O config (e.g. shared line-in/surround,
480 mic/clfe jacks) 470 mic/clfe jacks)
481 multi_cap_vol (bool) 471 multi_cap_vol (bool)
482 provide multiple capture volumes 472 provide multiple capture volumes
483 inv_dmic_split (bool) 473 inv_dmic_split (bool)
484 provide split internal mic volume/switch f 474 provide split internal mic volume/switch for phase-inverted
485 digital mics 475 digital mics
486 indep_hp (bool) 476 indep_hp (bool)
487 provide the independent headphone PCM stre 477 provide the independent headphone PCM stream and the corresponding
488 mixer control, if available 478 mixer control, if available
489 add_stereo_mix_input (bool) 479 add_stereo_mix_input (bool)
490 add the stereo mix (analog-loopback mix) t 480 add the stereo mix (analog-loopback mix) to the input mux if
491 available !! 481 available
492 add_jack_modes (bool) 482 add_jack_modes (bool)
493 add "xxx Jack Mode" enum controls to each 483 add "xxx Jack Mode" enum controls to each I/O jack for allowing to
494 change the headphone amp and mic bias VREF 484 change the headphone amp and mic bias VREF capabilities
495 power_save_node (bool) 485 power_save_node (bool)
496 advanced power management for each widget, 486 advanced power management for each widget, controlling the power
497 state (D0/D3) of each widget node dependin !! 487 sate (D0/D3) of each widget node depending on the actual pin and
498 stream states 488 stream states
499 power_down_unused (bool) 489 power_down_unused (bool)
500 power down the unused widgets, a subset of 490 power down the unused widgets, a subset of power_save_node, and
501 will be dropped in future !! 491 will be dropped in future
502 add_hp_mic (bool) 492 add_hp_mic (bool)
503 add the headphone to capture source if pos 493 add the headphone to capture source if possible
504 hp_mic_detect (bool) 494 hp_mic_detect (bool)
505 enable/disable the hp/mic shared input for 495 enable/disable the hp/mic shared input for a single built-in mic
506 case; default true 496 case; default true
507 vmaster (bool) 497 vmaster (bool)
508 enable/disable the virtual Master control; 498 enable/disable the virtual Master control; default true
509 mixer_nid (int) 499 mixer_nid (int)
510 specifies the widget NID of the analog-loo 500 specifies the widget NID of the analog-loopback mixer
511 501
512 502
513 Early Patching 503 Early Patching
514 -------------- 504 --------------
515 When ``CONFIG_SND_HDA_PATCH_LOADER=y`` is set, 505 When ``CONFIG_SND_HDA_PATCH_LOADER=y`` is set, you can pass a "patch"
516 as a firmware file for modifying the HD-audio 506 as a firmware file for modifying the HD-audio setup before
517 initializing the codec. This can work basical 507 initializing the codec. This can work basically like the
518 reconfiguration via sysfs in the above, but it 508 reconfiguration via sysfs in the above, but it does it before the
519 first codec configuration. 509 first codec configuration.
520 510
521 A patch file is a plain text file which looks 511 A patch file is a plain text file which looks like below:
522 512
523 :: 513 ::
524 514
525 [codec] 515 [codec]
526 0x12345678 0xabcd1234 2 516 0x12345678 0xabcd1234 2
527 517
528 [model] 518 [model]
529 auto 519 auto
530 520
531 [pincfg] 521 [pincfg]
532 0x12 0x411111f0 522 0x12 0x411111f0
533 523
534 [verb] 524 [verb]
535 0x20 0x500 0x03 525 0x20 0x500 0x03
536 0x20 0x400 0xff 526 0x20 0x400 0xff
537 527
538 [hint] 528 [hint]
539 jack_detect = no 529 jack_detect = no
540 530
541 531
542 The file needs to have a line ``[codec]``. Th 532 The file needs to have a line ``[codec]``. The next line should contain
543 three numbers indicating the codec vendor-id ( 533 three numbers indicating the codec vendor-id (0x12345678 in the
544 example), the codec subsystem-id (0xabcd1234) 534 example), the codec subsystem-id (0xabcd1234) and the address (2) of
545 the codec. The rest patch entries are applied 535 the codec. The rest patch entries are applied to this specified codec
546 until another codec entry is given. Passing 0 536 until another codec entry is given. Passing 0 or a negative number to
547 the first or the second value will make the ch 537 the first or the second value will make the check of the corresponding
548 field be skipped. It'll be useful for really 538 field be skipped. It'll be useful for really broken devices that don't
549 initialize SSID properly. 539 initialize SSID properly.
550 540
551 The ``[model]`` line allows to change the mode 541 The ``[model]`` line allows to change the model name of the each codec.
552 In the example above, it will be changed to mo 542 In the example above, it will be changed to model=auto.
553 Note that this overrides the module option. 543 Note that this overrides the module option.
554 544
555 After the ``[pincfg]`` line, the contents are 545 After the ``[pincfg]`` line, the contents are parsed as the initial
556 default pin-configurations just like ``user_pi 546 default pin-configurations just like ``user_pin_configs`` sysfs above.
557 The values can be shown in user_pin_configs sy 547 The values can be shown in user_pin_configs sysfs file, too.
558 548
559 Similarly, the lines after ``[verb]`` are pars 549 Similarly, the lines after ``[verb]`` are parsed as ``init_verbs``
560 sysfs entries, and the lines after ``[hint]`` 550 sysfs entries, and the lines after ``[hint]`` are parsed as ``hints``
561 sysfs entries, respectively. 551 sysfs entries, respectively.
562 552
563 Another example to override the codec vendor i 553 Another example to override the codec vendor id from 0x12345678 to
564 0xdeadbeef is like below: 554 0xdeadbeef is like below:
565 :: 555 ::
566 556
567 [codec] 557 [codec]
568 0x12345678 0xabcd1234 2 558 0x12345678 0xabcd1234 2
569 559
570 [vendor_id] 560 [vendor_id]
571 0xdeadbeef 561 0xdeadbeef
572 562
573 563
574 In the similar way, you can override the codec 564 In the similar way, you can override the codec subsystem_id via
575 ``[subsystem_id]``, the revision id via ``[rev 565 ``[subsystem_id]``, the revision id via ``[revision_id]`` line.
576 Also, the codec chip name can be rewritten via 566 Also, the codec chip name can be rewritten via ``[chip_name]`` line.
577 :: 567 ::
578 568
579 [codec] 569 [codec]
580 0x12345678 0xabcd1234 2 570 0x12345678 0xabcd1234 2
581 571
582 [subsystem_id] 572 [subsystem_id]
583 0xffff1111 573 0xffff1111
584 574
585 [revision_id] 575 [revision_id]
586 0x10 576 0x10
587 577
588 [chip_name] 578 [chip_name]
589 My-own NEWS-0002 579 My-own NEWS-0002
590 580
591 581
592 The hd-audio driver reads the file via request 582 The hd-audio driver reads the file via request_firmware(). Thus,
593 a patch file has to be located on the appropri 583 a patch file has to be located on the appropriate firmware path,
594 typically, /lib/firmware. For example, when y 584 typically, /lib/firmware. For example, when you pass the option
595 ``patch=hda-init.fw``, the file /lib/firmware/ 585 ``patch=hda-init.fw``, the file /lib/firmware/hda-init.fw must be
596 present. 586 present.
597 587
598 The patch module option is specific to each ca 588 The patch module option is specific to each card instance, and you
599 need to give one file name for each instance, 589 need to give one file name for each instance, separated by commas.
600 For example, if you have two cards, one for an !! 590 For example, if you have two cards, one for an on-board analog and one
601 for an HDMI video board, you may pass patch op 591 for an HDMI video board, you may pass patch option like below:
602 :: 592 ::
603 593
604 options snd-hda-intel patch=on-board-patch 594 options snd-hda-intel patch=on-board-patch,hdmi-patch
605 595
606 596
607 Power-Saving 597 Power-Saving
608 ------------ 598 ------------
609 The power-saving is a kind of auto-suspend of 599 The power-saving is a kind of auto-suspend of the device. When the
610 device is inactive for a certain time, the dev 600 device is inactive for a certain time, the device is automatically
611 turned off to save the power. The time to go 601 turned off to save the power. The time to go down is specified via
612 ``power_save`` module option, and this option 602 ``power_save`` module option, and this option can be changed dynamically
613 via sysfs. 603 via sysfs.
614 604
615 The power-saving won't work when the analog lo 605 The power-saving won't work when the analog loopback is enabled on
616 some codecs. Make sure that you mute all unne 606 some codecs. Make sure that you mute all unneeded signal routes when
617 you want the power-saving. 607 you want the power-saving.
618 608
619 The power-saving feature might cause audible c 609 The power-saving feature might cause audible click noises at each
620 power-down/up depending on the device. Some o 610 power-down/up depending on the device. Some of them might be
621 solvable, but some are hard, I'm afraid. Some 611 solvable, but some are hard, I'm afraid. Some distros such as
622 openSUSE enables the power-saving feature auto 612 openSUSE enables the power-saving feature automatically when the power
623 cable is unplugged. Thus, if you hear noises, 613 cable is unplugged. Thus, if you hear noises, suspect first the
624 power-saving. See /sys/module/snd_hda_intel/p 614 power-saving. See /sys/module/snd_hda_intel/parameters/power_save to
625 check the current value. If it's non-zero, th 615 check the current value. If it's non-zero, the feature is turned on.
626 616
627 The recent kernel supports the runtime PM for 617 The recent kernel supports the runtime PM for the HD-audio controller
628 chip, too. It means that the HD-audio control 618 chip, too. It means that the HD-audio controller is also powered up /
629 down dynamically. The feature is enabled only 619 down dynamically. The feature is enabled only for certain controller
630 chips like Intel LynxPoint. You can enable/di 620 chips like Intel LynxPoint. You can enable/disable this feature
631 forcibly by setting ``power_save_controller`` 621 forcibly by setting ``power_save_controller`` option, which is also
632 available at /sys/module/snd_hda_intel/paramet 622 available at /sys/module/snd_hda_intel/parameters directory.
633 623
634 624
635 Tracepoints 625 Tracepoints
636 ----------- 626 -----------
637 The hd-audio driver gives a few basic tracepoi 627 The hd-audio driver gives a few basic tracepoints.
638 ``hda:hda_send_cmd`` traces each CORB write wh 628 ``hda:hda_send_cmd`` traces each CORB write while ``hda:hda_get_response``
639 traces the response from RIRB (only when read 629 traces the response from RIRB (only when read from the codec driver).
640 ``hda:hda_bus_reset`` traces the bus-reset due 630 ``hda:hda_bus_reset`` traces the bus-reset due to fatal error, etc,
641 ``hda:hda_unsol_event`` traces the unsolicited 631 ``hda:hda_unsol_event`` traces the unsolicited events, and
642 ``hda:hda_power_down`` and ``hda:hda_power_up` 632 ``hda:hda_power_down`` and ``hda:hda_power_up`` trace the power down/up
643 via power-saving behavior. 633 via power-saving behavior.
644 634
645 Enabling all tracepoints can be done like 635 Enabling all tracepoints can be done like
646 :: 636 ::
647 637
648 # echo 1 > /sys/kernel/tracing/events/hda/ !! 638 # echo 1 > /sys/kernel/debug/tracing/events/hda/enable
649 639
650 then after some commands, you can traces from 640 then after some commands, you can traces from
651 /sys/kernel/tracing/trace file. For example, !! 641 /sys/kernel/debug/tracing/trace file. For example, when you want to
652 trace what codec command is sent, enable the t 642 trace what codec command is sent, enable the tracepoint like:
653 :: 643 ::
654 644
655 # cat /sys/kernel/tracing/trace !! 645 # cat /sys/kernel/debug/tracing/trace
656 # tracer: nop 646 # tracer: nop
657 # 647 #
658 # TASK-PID CPU# TIMESTAMP FUN 648 # TASK-PID CPU# TIMESTAMP FUNCTION
659 # | | | | 649 # | | | | |
660 <...>-7807 [002] 105147.774889: hd 650 <...>-7807 [002] 105147.774889: hda_send_cmd: [0:0] val=e3a019
661 <...>-7807 [002] 105147.774893: hd 651 <...>-7807 [002] 105147.774893: hda_send_cmd: [0:0] val=e39019
662 <...>-7807 [002] 105147.999542: hd 652 <...>-7807 [002] 105147.999542: hda_send_cmd: [0:0] val=e3a01a
663 <...>-7807 [002] 105147.999543: hd 653 <...>-7807 [002] 105147.999543: hda_send_cmd: [0:0] val=e3901a
664 <...>-26764 [001] 349222.837143: hd 654 <...>-26764 [001] 349222.837143: hda_send_cmd: [0:0] val=e3a019
665 <...>-26764 [001] 349222.837148: hd 655 <...>-26764 [001] 349222.837148: hda_send_cmd: [0:0] val=e39019
666 <...>-26764 [001] 349223.058539: hd 656 <...>-26764 [001] 349223.058539: hda_send_cmd: [0:0] val=e3a01a
667 <...>-26764 [001] 349223.058541: hd 657 <...>-26764 [001] 349223.058541: hda_send_cmd: [0:0] val=e3901a
668 658
669 Here ``[0:0]`` indicates the card number and t 659 Here ``[0:0]`` indicates the card number and the codec address, and
670 ``val`` shows the value sent to the codec, res 660 ``val`` shows the value sent to the codec, respectively. The value is
671 a packed value, and you can decode it via hda- 661 a packed value, and you can decode it via hda-decode-verb program
672 included in hda-emu package below. For exampl 662 included in hda-emu package below. For example, the value e3a019 is
673 to set the left output-amp value to 25. 663 to set the left output-amp value to 25.
674 :: 664 ::
675 665
676 % hda-decode-verb 0xe3a019 666 % hda-decode-verb 0xe3a019
677 raw value = 0x00e3a019 667 raw value = 0x00e3a019
678 cid = 0, nid = 0x0e, verb = 0x3a0, parm = 668 cid = 0, nid = 0x0e, verb = 0x3a0, parm = 0x19
679 raw value: verb = 0x3a0, parm = 0x19 669 raw value: verb = 0x3a0, parm = 0x19
680 verbname = set_amp_gain_mute 670 verbname = set_amp_gain_mute
681 amp raw val = 0xa019 671 amp raw val = 0xa019
682 output, left, idx=0, mute=0, val=25 672 output, left, idx=0, mute=0, val=25
683 673
684 674
685 Development Tree 675 Development Tree
686 ---------------- 676 ----------------
687 The latest development codes for HD-audio are 677 The latest development codes for HD-audio are found on sound git tree:
688 678
689 * git://git.kernel.org/pub/scm/linux/kernel/gi 679 * git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
690 680
691 The master branch or for-next branches can be 681 The master branch or for-next branches can be used as the main
692 development branches in general while the deve 682 development branches in general while the development for the current
693 and next kernels are found in for-linus and fo 683 and next kernels are found in for-linus and for-next branches,
694 respectively. 684 respectively.
695 685
696 686
697 Sending a Bug Report 687 Sending a Bug Report
698 -------------------- 688 --------------------
699 If any model or module options don't work for 689 If any model or module options don't work for your device, it's time
700 to send a bug report to the developers. Give 690 to send a bug report to the developers. Give the following in your
701 bug report: 691 bug report:
702 692
703 * Hardware vendor, product and model names 693 * Hardware vendor, product and model names
704 * Kernel version (and ALSA-driver version if y 694 * Kernel version (and ALSA-driver version if you built externally)
705 * ``alsa-info.sh`` output; run with ``--no-upl 695 * ``alsa-info.sh`` output; run with ``--no-upload`` option. See the
706 section below about alsa-info 696 section below about alsa-info
707 697
708 If it's a regression, at best, send alsa-info 698 If it's a regression, at best, send alsa-info outputs of both working
709 and non-working kernels. This is really helpf 699 and non-working kernels. This is really helpful because we can
710 compare the codec registers directly. 700 compare the codec registers directly.
711 701
712 Send a bug report either the following: 702 Send a bug report either the following:
713 703
714 kernel-bugzilla 704 kernel-bugzilla
715 https://bugzilla.kernel.org/ 705 https://bugzilla.kernel.org/
716 alsa-devel ML 706 alsa-devel ML
717 alsa-devel@alsa-project.org 707 alsa-devel@alsa-project.org
718 708
719 709
720 Debug Tools 710 Debug Tools
721 =========== 711 ===========
722 712
723 This section describes some tools available fo 713 This section describes some tools available for debugging HD-audio
724 problems. 714 problems.
725 715
726 alsa-info 716 alsa-info
727 --------- 717 ---------
728 The script ``alsa-info.sh`` is a very useful t 718 The script ``alsa-info.sh`` is a very useful tool to gather the audio
729 device information. It's included in alsa-uti 719 device information. It's included in alsa-utils package. The latest
730 version can be found on git repository: 720 version can be found on git repository:
731 721
732 * git://git.alsa-project.org/alsa-utils.git 722 * git://git.alsa-project.org/alsa-utils.git
733 723
734 The script can be fetched directly from the fo 724 The script can be fetched directly from the following URL, too:
735 725
736 * https://www.alsa-project.org/alsa-info.sh !! 726 * http://www.alsa-project.org/alsa-info.sh
737 727
738 Run this script as root, and it will gather th 728 Run this script as root, and it will gather the important information
739 such as the module lists, module parameters, p 729 such as the module lists, module parameters, proc file contents
740 including the codec proc files, mixer outputs 730 including the codec proc files, mixer outputs and the control
741 elements. As default, it will store the infor 731 elements. As default, it will store the information onto a web server
742 on alsa-project.org. But, if you send a bug r 732 on alsa-project.org. But, if you send a bug report, it'd be better to
743 run with ``--no-upload`` option, and attach th 733 run with ``--no-upload`` option, and attach the generated file.
744 734
745 There are some other useful options. See ``-- 735 There are some other useful options. See ``--help`` option output for
746 details. 736 details.
747 737
748 When a probe error occurs or when the driver o 738 When a probe error occurs or when the driver obviously assigns a
749 mismatched model, it'd be helpful to load the 739 mismatched model, it'd be helpful to load the driver with
750 ``probe_only=1`` option (at best after the col 740 ``probe_only=1`` option (at best after the cold reboot) and run
751 alsa-info at this state. With this option, th 741 alsa-info at this state. With this option, the driver won't configure
752 the mixer and PCM but just tries to probe the 742 the mixer and PCM but just tries to probe the codec slot. After
753 probing, the proc file is available, so you ca 743 probing, the proc file is available, so you can get the raw codec
754 information before modified by the driver. Of 744 information before modified by the driver. Of course, the driver
755 isn't usable with ``probe_only=1``. But you c 745 isn't usable with ``probe_only=1``. But you can continue the
756 configuration via hwdep sysfs file if hda-reco 746 configuration via hwdep sysfs file if hda-reconfig option is enabled.
757 Using ``probe_only`` mask 2 skips the reset of 747 Using ``probe_only`` mask 2 skips the reset of HDA codecs (use
758 ``probe_only=3`` as module option). The hwdep 748 ``probe_only=3`` as module option). The hwdep interface can be used
759 to determine the BIOS codec initialization. 749 to determine the BIOS codec initialization.
760 750
761 751
762 hda-verb 752 hda-verb
763 -------- 753 --------
764 hda-verb is a tiny program that allows you to 754 hda-verb is a tiny program that allows you to access the HD-audio
765 codec directly. You can execute a raw HD-audi 755 codec directly. You can execute a raw HD-audio codec verb with this.
766 This program accesses the hwdep device, thus y 756 This program accesses the hwdep device, thus you need to enable the
767 kernel config ``CONFIG_SND_HDA_HWDEP=y`` befor 757 kernel config ``CONFIG_SND_HDA_HWDEP=y`` beforehand.
768 758
769 The hda-verb program takes four arguments: the 759 The hda-verb program takes four arguments: the hwdep device file, the
770 widget NID, the verb and the parameter. When 760 widget NID, the verb and the parameter. When you access to the codec
771 on the slot 2 of the card 0, pass /dev/snd/hwC 761 on the slot 2 of the card 0, pass /dev/snd/hwC0D2 to the first
772 argument, typically. (However, the real path 762 argument, typically. (However, the real path name depends on the
773 system.) 763 system.)
774 764
775 The second parameter is the widget number-id t 765 The second parameter is the widget number-id to access. The third
776 parameter can be either a hex/digit number or 766 parameter can be either a hex/digit number or a string corresponding
777 to a verb. Similarly, the last parameter is t 767 to a verb. Similarly, the last parameter is the value to write, or
778 can be a string for the parameter type. 768 can be a string for the parameter type.
779 769
780 :: 770 ::
781 771
782 % hda-verb /dev/snd/hwC0D0 0x12 0x701 2 772 % hda-verb /dev/snd/hwC0D0 0x12 0x701 2
783 nid = 0x12, verb = 0x701, param = 0x2 773 nid = 0x12, verb = 0x701, param = 0x2
784 value = 0x0 774 value = 0x0
785 775
786 % hda-verb /dev/snd/hwC0D0 0x0 PARAMETERS 776 % hda-verb /dev/snd/hwC0D0 0x0 PARAMETERS VENDOR_ID
787 nid = 0x0, verb = 0xf00, param = 0x0 777 nid = 0x0, verb = 0xf00, param = 0x0
788 value = 0x10ec0262 778 value = 0x10ec0262
789 779
790 % hda-verb /dev/snd/hwC0D0 2 set_a 0xb080 780 % hda-verb /dev/snd/hwC0D0 2 set_a 0xb080
791 nid = 0x2, verb = 0x300, param = 0xb080 781 nid = 0x2, verb = 0x300, param = 0xb080
792 value = 0x0 782 value = 0x0
793 783
794 784
795 Although you can issue any verbs with this pro 785 Although you can issue any verbs with this program, the driver state
796 won't be always updated. For example, the vol 786 won't be always updated. For example, the volume values are usually
797 cached in the driver, and thus changing the wi 787 cached in the driver, and thus changing the widget amp value directly
798 via hda-verb won't change the mixer value. 788 via hda-verb won't change the mixer value.
799 789
800 The hda-verb program is included now in alsa-t 790 The hda-verb program is included now in alsa-tools:
801 791
802 * git://git.alsa-project.org/alsa-tools.git 792 * git://git.alsa-project.org/alsa-tools.git
803 793
804 Also, the old stand-alone package is found in 794 Also, the old stand-alone package is found in the ftp directory:
805 795
806 * ftp://ftp.suse.com/pub/people/tiwai/misc/ 796 * ftp://ftp.suse.com/pub/people/tiwai/misc/
807 797
808 Also a git repository is available: 798 Also a git repository is available:
809 799
810 * git://git.kernel.org/pub/scm/linux/kernel/gi 800 * git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/hda-verb.git
811 801
812 See README file in the tarball for more detail 802 See README file in the tarball for more details about hda-verb
813 program. 803 program.
814 804
815 805
816 hda-analyzer 806 hda-analyzer
817 ------------ 807 ------------
818 hda-analyzer provides a graphical interface to 808 hda-analyzer provides a graphical interface to access the raw HD-audio
819 control, based on pyGTK2 binding. It's a more 809 control, based on pyGTK2 binding. It's a more powerful version of
820 hda-verb. The program gives you an easy-to-us 810 hda-verb. The program gives you an easy-to-use GUI stuff for showing
821 the widget information and adjusting the amp v 811 the widget information and adjusting the amp values, as well as the
822 proc-compatible output. 812 proc-compatible output.
823 813
824 The hda-analyzer: 814 The hda-analyzer:
825 815
826 * https://git.alsa-project.org/?p=alsa.git;a=t !! 816 * http://git.alsa-project.org/?p=alsa.git;a=tree;f=hda-analyzer
827 817
828 is a part of alsa.git repository in alsa-proje 818 is a part of alsa.git repository in alsa-project.org:
829 819
830 * git://git.alsa-project.org/alsa.git 820 * git://git.alsa-project.org/alsa.git
831 821
832 Codecgraph 822 Codecgraph
833 ---------- 823 ----------
834 Codecgraph is a utility program to generate a 824 Codecgraph is a utility program to generate a graph and visualizes the
835 codec-node connection of a codec chip. It's e 825 codec-node connection of a codec chip. It's especially useful when
836 you analyze or debug a codec without a proper 826 you analyze or debug a codec without a proper datasheet. The program
837 parses the given codec proc file and converts 827 parses the given codec proc file and converts to SVG via graphiz
838 program. 828 program.
839 829
840 The tarball and GIT trees are found in the web 830 The tarball and GIT trees are found in the web page at:
841 831
842 * http://helllabs.org/codecgraph/ 832 * http://helllabs.org/codecgraph/
843 833
844 834
845 hda-emu 835 hda-emu
846 ------- 836 -------
847 hda-emu is an HD-audio emulator. The main pur 837 hda-emu is an HD-audio emulator. The main purpose of this program is
848 to debug an HD-audio codec without the real ha 838 to debug an HD-audio codec without the real hardware. Thus, it
849 doesn't emulate the behavior with the real aud 839 doesn't emulate the behavior with the real audio I/O, but it just
850 dumps the codec register changes and the ALSA- 840 dumps the codec register changes and the ALSA-driver internal changes
851 at probing and operating the HD-audio driver. 841 at probing and operating the HD-audio driver.
852 842
853 The program requires a codec proc-file to simu 843 The program requires a codec proc-file to simulate. Get a proc file
854 for the target codec beforehand, or pick up an 844 for the target codec beforehand, or pick up an example codec from the
855 codec proc collections in the tarball. Then, 845 codec proc collections in the tarball. Then, run the program with the
856 proc file, and the hda-emu program will start 846 proc file, and the hda-emu program will start parsing the codec file
857 and simulates the HD-audio driver: 847 and simulates the HD-audio driver:
858 848
859 :: 849 ::
860 850
861 % hda-emu codecs/stac9200-dell-d820-laptop 851 % hda-emu codecs/stac9200-dell-d820-laptop
862 # Parsing.. 852 # Parsing..
863 hda_codec: Unknown model for STAC9200, usi 853 hda_codec: Unknown model for STAC9200, using BIOS defaults
864 hda_codec: pin nid 08 bios pin config 40c0 854 hda_codec: pin nid 08 bios pin config 40c003fa
865 .... 855 ....
866 856
867 857
868 The program gives you only a very dumb command 858 The program gives you only a very dumb command-line interface. You
869 can get a proc-file dump at the current state, 859 can get a proc-file dump at the current state, get a list of control
870 (mixer) elements, set/get the control element 860 (mixer) elements, set/get the control element value, simulate the PCM
871 operation, the jack plugging simulation, etc. 861 operation, the jack plugging simulation, etc.
872 862
873 The program is found in the git repository bel 863 The program is found in the git repository below:
874 864
875 * git://git.kernel.org/pub/scm/linux/kernel/gi 865 * git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/hda-emu.git
876 866
877 See README file in the repository for more det 867 See README file in the repository for more details about hda-emu
878 program. 868 program.
879 869
880 870
881 hda-jack-retask 871 hda-jack-retask
882 --------------- 872 ---------------
883 hda-jack-retask is a user-friendly GUI program 873 hda-jack-retask is a user-friendly GUI program to manipulate the
884 HD-audio pin control for jack retasking. If y 874 HD-audio pin control for jack retasking. If you have a problem about
885 the jack assignment, try this program and chec 875 the jack assignment, try this program and check whether you can get
886 useful results. Once when you figure out the 876 useful results. Once when you figure out the proper pin assignment,
887 it can be fixed either in the driver code stat 877 it can be fixed either in the driver code statically or via passing a
888 firmware patch file (see "Early Patching" sect 878 firmware patch file (see "Early Patching" section).
889 879
890 The program is included in alsa-tools now: 880 The program is included in alsa-tools now:
891 881
892 * git://git.alsa-project.org/alsa-tools.git 882 * git://git.alsa-project.org/alsa-tools.git
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