1 ============================================== 1 ===================================================
2 Dynamic Audio Power Management for Portable De 2 Dynamic Audio Power Management for Portable Devices
3 ============================================== 3 ===================================================
4 4
5 Description 5 Description
6 =========== 6 ===========
7 7
8 Dynamic Audio Power Management (DAPM) is desig 8 Dynamic Audio Power Management (DAPM) is designed to allow portable
9 Linux devices to use the minimum amount of pow 9 Linux devices to use the minimum amount of power within the audio
10 subsystem at all times. It is independent of o !! 10 subsystem at all times. It is independent of other kernel PM and as
11 management frameworks and, as such, can easily !! 11 such, can easily co-exist with the other PM systems.
12 12
13 DAPM is also completely transparent to all use 13 DAPM is also completely transparent to all user space applications as
14 all power switching is done within the ASoC co 14 all power switching is done within the ASoC core. No code changes or
15 recompiling are required for user space applic 15 recompiling are required for user space applications. DAPM makes power
16 switching decisions based upon any audio strea 16 switching decisions based upon any audio stream (capture/playback)
17 activity and audio mixer settings within the d 17 activity and audio mixer settings within the device.
18 18
19 DAPM is based on two basic elements, called wi !! 19 DAPM spans the whole machine. It covers power control within the entire
>> 20 audio subsystem, this includes internal codec power blocks and machine
>> 21 level power systems.
20 22
21 * a **widget** is every part of the audio har !! 23 There are 4 power domains within DAPM
22 software when in use and disabled to save p <<
23 * a **route** is an interconnection between w <<
24 can flow from one widget to the other <<
25 <<
26 All DAPM power switching decisions are made au <<
27 audio routing graph. This graph is specific to <<
28 the whole sound card, so some DAPM routes conn <<
29 different components (e.g. the LINE OUT pin of <<
30 an amplifier). <<
31 <<
32 The graph for the STM32MP1-DK1 sound card is s <<
33 <<
34 .. kernel-figure:: dapm-graph.svg <<
35 :alt: Example DAPM graph <<
36 :align: center <<
37 <<
38 DAPM power domains <<
39 ================== <<
40 <<
41 There are 4 power domains within DAPM: <<
42 24
43 Codec bias domain 25 Codec bias domain
44 VREF, VMID (core codec and audio power) 26 VREF, VMID (core codec and audio power)
45 27
46 Usually controlled at codec probe/remove 28 Usually controlled at codec probe/remove and suspend/resume, although
47 can be set at stream time if power is no 29 can be set at stream time if power is not needed for sidetone, etc.
48 30
49 Platform/Machine domain 31 Platform/Machine domain
50 physically connected inputs and outputs 32 physically connected inputs and outputs
51 33
52 Is platform/machine and user action spec 34 Is platform/machine and user action specific, is configured by the
53 machine driver and responds to asynchron 35 machine driver and responds to asynchronous events e.g when HP
54 are inserted 36 are inserted
55 37
56 Path domain 38 Path domain
57 audio subsystem signal paths 39 audio subsystem signal paths
58 40
59 Automatically set when mixer and mux set 41 Automatically set when mixer and mux settings are changed by the user.
60 e.g. alsamixer, amixer. 42 e.g. alsamixer, amixer.
61 43
62 Stream domain 44 Stream domain
63 DACs and ADCs. 45 DACs and ADCs.
64 46
65 Enabled and disabled when stream playbac 47 Enabled and disabled when stream playback/capture is started and
66 stopped respectively. e.g. aplay, arecor 48 stopped respectively. e.g. aplay, arecord.
67 49
>> 50 All DAPM power switching decisions are made automatically by consulting an audio
>> 51 routing map of the whole machine. This map is specific to each machine and
>> 52 consists of the interconnections between every audio component (including
>> 53 internal codec components). All audio components that effect power are called
>> 54 widgets hereafter.
>> 55
68 56
69 DAPM Widgets 57 DAPM Widgets
70 ============ 58 ============
71 59
72 Audio DAPM widgets fall into a number of types !! 60 Audio DAPM widgets fall into a number of types:-
73 61
74 Mixer 62 Mixer
75 Mixes several analog signals into a si 63 Mixes several analog signals into a single analog signal.
76 Mux 64 Mux
77 An analog switch that outputs only one 65 An analog switch that outputs only one of many inputs.
78 PGA 66 PGA
79 A programmable gain amplifier or atten 67 A programmable gain amplifier or attenuation widget.
80 ADC 68 ADC
81 Analog to Digital Converter 69 Analog to Digital Converter
82 DAC 70 DAC
83 Digital to Analog Converter 71 Digital to Analog Converter
84 Switch 72 Switch
85 An analog switch 73 An analog switch
86 Input 74 Input
87 A codec input pin 75 A codec input pin
88 Output 76 Output
89 A codec output pin 77 A codec output pin
90 Headphone 78 Headphone
91 Headphone (and optional Jack) 79 Headphone (and optional Jack)
92 Mic 80 Mic
93 Mic (and optional Jack) 81 Mic (and optional Jack)
94 Line 82 Line
95 Line Input/Output (and optional Jack) 83 Line Input/Output (and optional Jack)
96 Speaker 84 Speaker
97 Speaker 85 Speaker
98 Supply 86 Supply
99 Power or clock supply widget used by o 87 Power or clock supply widget used by other widgets.
100 Regulator 88 Regulator
101 External regulator that supplies power 89 External regulator that supplies power to audio components.
102 Clock 90 Clock
103 External clock that supplies clock to 91 External clock that supplies clock to audio components.
104 AIF IN 92 AIF IN
105 Audio Interface Input (with TDM slot m 93 Audio Interface Input (with TDM slot mask).
106 AIF OUT 94 AIF OUT
107 Audio Interface Output (with TDM slot 95 Audio Interface Output (with TDM slot mask).
108 Siggen 96 Siggen
109 Signal Generator. 97 Signal Generator.
110 DAI IN 98 DAI IN
111 Digital Audio Interface Input. 99 Digital Audio Interface Input.
112 DAI OUT 100 DAI OUT
113 Digital Audio Interface Output. 101 Digital Audio Interface Output.
114 DAI Link 102 DAI Link
115 DAI Link between two DAI structures 103 DAI Link between two DAI structures
116 Pre 104 Pre
117 Special PRE widget (exec before all ot 105 Special PRE widget (exec before all others)
118 Post 106 Post
119 Special POST widget (exec after all ot 107 Special POST widget (exec after all others)
120 Buffer 108 Buffer
121 Inter widget audio data buffer within 109 Inter widget audio data buffer within a DSP.
122 Scheduler 110 Scheduler
123 DSP internal scheduler that schedules 111 DSP internal scheduler that schedules component/pipeline processing
124 work. 112 work.
125 Effect 113 Effect
126 Widget that performs an audio processi 114 Widget that performs an audio processing effect.
127 SRC 115 SRC
128 Sample Rate Converter within DSP or CO 116 Sample Rate Converter within DSP or CODEC
129 ASRC 117 ASRC
130 Asynchronous Sample Rate Converter wit 118 Asynchronous Sample Rate Converter within DSP or CODEC
131 Encoder 119 Encoder
132 Widget that encodes audio data from on 120 Widget that encodes audio data from one format (usually PCM) to another
133 usually more compressed format. 121 usually more compressed format.
134 Decoder 122 Decoder
135 Widget that decodes audio data from a 123 Widget that decodes audio data from a compressed format to an
136 uncompressed format like PCM. 124 uncompressed format like PCM.
137 125
138 126
139 (Widgets are defined in include/sound/soc-dapm 127 (Widgets are defined in include/sound/soc-dapm.h)
140 128
141 Widgets can be added to the sound card by any 129 Widgets can be added to the sound card by any of the component driver types.
142 There are convenience macros defined in soc-da 130 There are convenience macros defined in soc-dapm.h that can be used to quickly
143 build a list of widgets of the codecs and mach 131 build a list of widgets of the codecs and machines DAPM widgets.
144 132
145 Most widgets have a name, register, shift and 133 Most widgets have a name, register, shift and invert. Some widgets have extra
146 parameters for stream name and kcontrols. 134 parameters for stream name and kcontrols.
147 135
148 136
149 Stream Domain Widgets 137 Stream Domain Widgets
150 --------------------- 138 ---------------------
151 139
152 Stream Widgets relate to the stream power doma 140 Stream Widgets relate to the stream power domain and only consist of ADCs
153 (analog to digital converters), DACs (digital 141 (analog to digital converters), DACs (digital to analog converters),
154 AIF IN and AIF OUT. 142 AIF IN and AIF OUT.
155 143
156 Stream widgets have the following format: !! 144 Stream widgets have the following format:-
157 :: 145 ::
158 146
159 SND_SOC_DAPM_DAC(name, stream name, reg, shi 147 SND_SOC_DAPM_DAC(name, stream name, reg, shift, invert),
160 SND_SOC_DAPM_AIF_IN(name, stream, slot, reg, 148 SND_SOC_DAPM_AIF_IN(name, stream, slot, reg, shift, invert)
161 149
162 NOTE: the stream name must match the correspon 150 NOTE: the stream name must match the corresponding stream name in your codec
163 snd_soc_dai_driver. !! 151 snd_soc_codec_dai.
164 152
165 e.g. stream widgets for HiFi playback and capt 153 e.g. stream widgets for HiFi playback and capture
166 :: 154 ::
167 155
168 SND_SOC_DAPM_DAC("HiFi DAC", "HiFi Playback" 156 SND_SOC_DAPM_DAC("HiFi DAC", "HiFi Playback", REG, 3, 1),
169 SND_SOC_DAPM_ADC("HiFi ADC", "HiFi Capture", 157 SND_SOC_DAPM_ADC("HiFi ADC", "HiFi Capture", REG, 2, 1),
170 158
171 e.g. stream widgets for AIF 159 e.g. stream widgets for AIF
172 :: 160 ::
173 161
174 SND_SOC_DAPM_AIF_IN("AIF1RX", "AIF1 Playback 162 SND_SOC_DAPM_AIF_IN("AIF1RX", "AIF1 Playback", 0, SND_SOC_NOPM, 0, 0),
175 SND_SOC_DAPM_AIF_OUT("AIF1TX", "AIF1 Capture 163 SND_SOC_DAPM_AIF_OUT("AIF1TX", "AIF1 Capture", 0, SND_SOC_NOPM, 0, 0),
176 164
177 165
178 Path Domain Widgets 166 Path Domain Widgets
179 ------------------- 167 -------------------
180 168
181 Path domain widgets have a ability to control 169 Path domain widgets have a ability to control or affect the audio signal or
182 audio paths within the audio subsystem. They h !! 170 audio paths within the audio subsystem. They have the following form:-
183 :: 171 ::
184 172
185 SND_SOC_DAPM_PGA(name, reg, shift, invert, c 173 SND_SOC_DAPM_PGA(name, reg, shift, invert, controls, num_controls)
186 174
187 Any widget kcontrols can be set using the cont 175 Any widget kcontrols can be set using the controls and num_controls members.
188 176
189 e.g. Mixer widget (the kcontrols are declared 177 e.g. Mixer widget (the kcontrols are declared first)
190 :: 178 ::
191 179
192 /* Output Mixer */ 180 /* Output Mixer */
193 static const snd_kcontrol_new_t wm8731_outpu 181 static const snd_kcontrol_new_t wm8731_output_mixer_controls[] = {
194 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731 182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
195 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM873 183 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
196 SOC_DAPM_SINGLE("HiFi Playback Switch", WM87 184 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
197 }; 185 };
198 186
199 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PW 187 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, wm8731_output_mixer_controls,
200 ARRAY_SIZE(wm8731_output_mixer_control 188 ARRAY_SIZE(wm8731_output_mixer_controls)),
201 189
202 If you don't want the mixer elements prefixed 190 If you don't want the mixer elements prefixed with the name of the mixer widget,
203 you can use SND_SOC_DAPM_MIXER_NAMED_CTL inste 191 you can use SND_SOC_DAPM_MIXER_NAMED_CTL instead. the parameters are the same
204 as for SND_SOC_DAPM_MIXER. 192 as for SND_SOC_DAPM_MIXER.
205 193
206 194
207 Machine domain Widgets 195 Machine domain Widgets
208 ---------------------- 196 ----------------------
209 197
210 Machine widgets are different from codec widge 198 Machine widgets are different from codec widgets in that they don't have a
211 codec register bit associated with them. A mac 199 codec register bit associated with them. A machine widget is assigned to each
212 machine audio component (non codec or DSP) tha 200 machine audio component (non codec or DSP) that can be independently
213 powered. e.g. 201 powered. e.g.
214 202
215 * Speaker Amp 203 * Speaker Amp
216 * Microphone Bias 204 * Microphone Bias
217 * Jack connectors 205 * Jack connectors
218 206
219 A machine widget can have an optional call bac 207 A machine widget can have an optional call back.
220 208
221 e.g. Jack connector widget for an external Mic 209 e.g. Jack connector widget for an external Mic that enables Mic Bias
222 when the Mic is inserted:: !! 210 when the Mic is inserted:-::
223 211
224 static int spitz_mic_bias(struct snd_soc_dap 212 static int spitz_mic_bias(struct snd_soc_dapm_widget* w, int event)
225 { 213 {
226 gpio_set_value(SPITZ_GPIO_MIC_BIAS, SN 214 gpio_set_value(SPITZ_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
227 return 0; 215 return 0;
228 } 216 }
229 217
230 SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias) 218 SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
231 219
232 220
233 Codec (BIAS) Domain 221 Codec (BIAS) Domain
234 ------------------- 222 -------------------
235 223
236 The codec bias power domain has no widgets and !! 224 The codec bias power domain has no widgets and is handled by the codecs DAPM
237 event handler. This handler is called when the 225 event handler. This handler is called when the codec powerstate is changed wrt
238 to any stream event or by kernel PM events. 226 to any stream event or by kernel PM events.
239 227
240 228
241 Virtual Widgets 229 Virtual Widgets
242 --------------- 230 ---------------
243 231
244 Sometimes widgets exist in the codec or machin !! 232 Sometimes widgets exist in the codec or machine audio map that don't have any
245 corresponding soft power control. In this case 233 corresponding soft power control. In this case it is necessary to create
246 a virtual widget - a widget with no control bi 234 a virtual widget - a widget with no control bits e.g.
247 :: 235 ::
248 236
249 SND_SOC_DAPM_MIXER("AC97 Mixer", SND_SOC_NOP 237 SND_SOC_DAPM_MIXER("AC97 Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
250 238
251 This can be used to merge two signal paths tog !! 239 This can be used to merge to signal paths together in software.
252 <<
253 Registering DAPM controls <<
254 ========================= <<
255 240
256 In many cases the DAPM widgets are implemented !! 241 After all the widgets have been defined, they can then be added to the DAPM
257 const struct snd_soc_dapm_widget`` array in a !! 242 subsystem individually with a call to snd_soc_dapm_new_control().
258 declared via the ``dapm_widgets`` and ``num_da <<
259 ``struct snd_soc_component_driver``. <<
260 <<
261 Similarly, routes connecting them are implemen <<
262 const struct snd_soc_dapm_route`` array and de <<
263 ``dapm_routes`` and ``num_dapm_routes`` fields <<
264 <<
265 With the above declared, the driver registrati <<
266 populating them:: <<
267 <<
268 static const struct snd_soc_dapm_widget wm20 <<
269 SND_SOC_DAPM_OUTPUT("SPKN"), <<
270 SND_SOC_DAPM_OUTPUT("SPKP"), <<
271 ... <<
272 }; <<
273 <<
274 /* Target, Path, Source */ <<
275 static const struct snd_soc_dapm_route wm200 <<
276 { "SPKN", NULL, "ANC Engine" }, <<
277 { "SPKP", NULL, "ANC Engine" }, <<
278 ... <<
279 }; <<
280 <<
281 static const struct snd_soc_component_driver <<
282 ... <<
283 .dapm_widgets = wm2000_dapm_ <<
284 .num_dapm_widgets = ARRAY_SIZE(w <<
285 .dapm_routes = wm2000_audio <<
286 .num_dapm_routes = ARRAY_SIZE(w <<
287 ... <<
288 }; <<
289 <<
290 In more complex cases the list of DAPM widgets <<
291 known at probe time. This happens for example <<
292 different models having a different set of fea <<
293 separate widgets and routes arrays implementin <<
294 can be registered programmatically by calling <<
295 and snd_soc_dapm_add_routes(). <<
296 243
297 244
298 Codec/DSP Widget Interconnections 245 Codec/DSP Widget Interconnections
299 ================================= 246 =================================
300 247
301 Widgets are connected to each other within the 248 Widgets are connected to each other within the codec, platform and machine by
302 audio paths (called interconnections). Each in 249 audio paths (called interconnections). Each interconnection must be defined in
303 order to create a graph of all audio paths bet !! 250 order to create a map of all audio paths between widgets.
304 251
305 This is easiest with a diagram of the codec or 252 This is easiest with a diagram of the codec or DSP (and schematic of the machine
306 audio system), as it requires joining widgets 253 audio system), as it requires joining widgets together via their audio signal
307 paths. 254 paths.
308 255
309 For example the WM8731 output mixer (wm8731.c) !! 256 e.g., from the WM8731 output mixer (wm8731.c)
>> 257
>> 258 The WM8731 output mixer has 3 inputs (sources)
310 259
311 1. Line Bypass Input 260 1. Line Bypass Input
312 2. DAC (HiFi playback) 261 2. DAC (HiFi playback)
313 3. Mic Sidetone Input 262 3. Mic Sidetone Input
314 263
315 Each input in this example has a kcontrol asso !! 264 Each input in this example has a kcontrol associated with it (defined in example
316 the example above) and is connected to the out !! 265 above) and is connected to the output mixer via its kcontrol name. We can now
317 name. We can now connect the destination widge !! 266 connect the destination widget (wrt audio signal) with its source widgets.
318 source widgets. :: !! 267 ::
319 268
320 /* output mixer */ 269 /* output mixer */
321 {"Output Mixer", "Line Bypass Switch", 270 {"Output Mixer", "Line Bypass Switch", "Line Input"},
322 {"Output Mixer", "HiFi Playback Switch 271 {"Output Mixer", "HiFi Playback Switch", "DAC"},
323 {"Output Mixer", "Mic Sidetone Switch" 272 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
324 273
325 So we have: !! 274 So we have :-
326 275
327 * Destination Widget <=== Path Name <=== Sour 276 * Destination Widget <=== Path Name <=== Source Widget, or
328 * Sink, Path, Source, or 277 * Sink, Path, Source, or
329 * ``Output Mixer`` is connected to the ``DAC`` 278 * ``Output Mixer`` is connected to the ``DAC`` via the ``HiFi Playback Switch``.
330 279
331 When there is no path name connecting widgets 280 When there is no path name connecting widgets (e.g. a direct connection) we
332 pass NULL for the path name. 281 pass NULL for the path name.
333 282
334 Interconnections are created with a call to:: !! 283 Interconnections are created with a call to:-
>> 284 ::
335 285
336 snd_soc_dapm_connect_input(codec, sink, path 286 snd_soc_dapm_connect_input(codec, sink, path, source);
337 287
338 Finally, snd_soc_dapm_new_widgets() must be ca !! 288 Finally, snd_soc_dapm_new_widgets(codec) must be called after all widgets and
339 interconnections have been registered with the 289 interconnections have been registered with the core. This causes the core to
340 scan the codec and machine so that the interna 290 scan the codec and machine so that the internal DAPM state matches the
341 physical state of the machine. 291 physical state of the machine.
342 292
343 293
344 Machine Widget Interconnections 294 Machine Widget Interconnections
345 ------------------------------- 295 -------------------------------
346 Machine widget interconnections are created in 296 Machine widget interconnections are created in the same way as codec ones and
347 directly connect the codec pins to machine lev 297 directly connect the codec pins to machine level widgets.
348 298
349 e.g. connects the speaker out codec pins to th 299 e.g. connects the speaker out codec pins to the internal speaker.
350 :: 300 ::
351 301
352 /* ext speaker connected to codec pins 302 /* ext speaker connected to codec pins LOUT2, ROUT2 */
353 {"Ext Spk", NULL , "ROUT2"}, 303 {"Ext Spk", NULL , "ROUT2"},
354 {"Ext Spk", NULL , "LOUT2"}, 304 {"Ext Spk", NULL , "LOUT2"},
355 305
356 This allows the DAPM to power on and off pins 306 This allows the DAPM to power on and off pins that are connected (and in use)
357 and pins that are NC respectively. 307 and pins that are NC respectively.
358 308
359 309
360 Endpoint Widgets 310 Endpoint Widgets
361 ================ 311 ================
362 An endpoint is a start or end point (widget) o 312 An endpoint is a start or end point (widget) of an audio signal within the
363 machine and includes the codec. e.g. 313 machine and includes the codec. e.g.
364 314
365 * Headphone Jack 315 * Headphone Jack
366 * Internal Speaker 316 * Internal Speaker
367 * Internal Mic 317 * Internal Mic
368 * Mic Jack 318 * Mic Jack
369 * Codec Pins 319 * Codec Pins
370 320
371 Endpoints are added to the DAPM graph so that 321 Endpoints are added to the DAPM graph so that their usage can be determined in
372 order to save power. e.g. NC codecs pins will 322 order to save power. e.g. NC codecs pins will be switched OFF, unconnected
373 jacks can also be switched OFF. 323 jacks can also be switched OFF.
374 324
375 325
376 DAPM Widget Events 326 DAPM Widget Events
377 ================== 327 ==================
378 328
379 Widgets needing to implement a more complex be !! 329 Some widgets can register their interest with the DAPM core in PM events.
380 can set a custom "event handler" by setting a !! 330 e.g. A Speaker with an amplifier registers a widget so the amplifier can be
381 is a power supply needing to enable a GPIO:: !! 331 powered only when the spk is in use.
>> 332 ::
382 333
383 static int sof_es8316_speaker_power_event(st !! 334 /* turn speaker amplifier on/off depending on use */
384 stru !! 335 static int corgi_amp_event(struct snd_soc_dapm_widget *w, int event)
385 { 336 {
386 if (SND_SOC_DAPM_EVENT_ON(event)) !! 337 gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
387 gpiod_set_value_cansleep(gpio_ !! 338 return 0;
388 else <<
389 gpiod_set_value_cansleep(gpio_ <<
390 <<
391 return 0; <<
392 } 339 }
393 340
394 static const struct snd_soc_dapm_widget st_w !! 341 /* corgi machine dapm widgets */
395 ... !! 342 static const struct snd_soc_dapm_widget wm8731_dapm_widgets =
396 SND_SOC_DAPM_SUPPLY("Speaker Power", S !! 343 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event);
397 sof_es8316_speaker <<
398 SND_SOC_DAPM_PRE_P <<
399 }; <<
400 344
401 See soc-dapm.h for all other widgets that supp !! 345 Please see soc-dapm.h for all other widgets that support events.
402 346
403 347
404 Event types 348 Event types
405 ----------- 349 -----------
406 350
407 The following event types are supported by eve !! 351 The following event types are supported by event widgets.
>> 352 ::
408 353
409 /* dapm event types */ 354 /* dapm event types */
410 #define SND_SOC_DAPM_PRE_PMU 0x1 !! 355 #define SND_SOC_DAPM_PRE_PMU 0x1 /* before widget power up */
411 #define SND_SOC_DAPM_POST_PMU 0x2 !! 356 #define SND_SOC_DAPM_POST_PMU 0x2 /* after widget power up */
412 #define SND_SOC_DAPM_PRE_PMD 0x4 !! 357 #define SND_SOC_DAPM_PRE_PMD 0x4 /* before widget power down */
413 #define SND_SOC_DAPM_POST_PMD 0x8 !! 358 #define SND_SOC_DAPM_POST_PMD 0x8 /* after widget power down */
414 #define SND_SOC_DAPM_PRE_REG 0x10 !! 359 #define SND_SOC_DAPM_PRE_REG 0x10 /* before audio path setup */
415 #define SND_SOC_DAPM_POST_REG 0x20 !! 360 #define SND_SOC_DAPM_POST_REG 0x20 /* after audio path setup */
416 #define SND_SOC_DAPM_WILL_PMU 0x40 <<
417 #define SND_SOC_DAPM_WILL_PMD 0x80 <<
418 #define SND_SOC_DAPM_PRE_POST_PMD (SND_S <<
419 #define SND_SOC_DAPM_PRE_POST_PMU (SND_S <<
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