sound/soc/dapm.rst

8 Dynamic Audio Power Management (DAPM) is designed to allow portable
13 DAPM is also completely transparent to all user space applications as
15 recompiling are required for user space applications. DAPM makes power
19 DAPM spans the whole machine. It covers power control within the entire
23 There are 4 power domains within DAPM
50 All DAPM power switching decisions are made automatically by consulting an audio
57 DAPM Widgets
60 Audio DAPM widgets fall into a number of types:-
127 (Widgets are defined in include/sound/soc-dapm.h)
130 There are convenience macros defined in soc-dapm.h that can be used to quickly
131 build a list of widgets of the codecs and machines DAPM widgets.
224 The codec bias power domain has no widgets and is handled by the codecs DAPM
241 After all the widgets have been defined, they can then be added to the DAPM
290 scan the codec and machine so that the internal DAPM state matches the
306 This allows the DAPM to power on and off pins that are connected (and in use)
321 Endpoints are added to the DAPM graph so that their usage can be determined in
326 DAPM Widget Events
329 Some widgets can register their interest with the DAPM core in PM events.
341   /* corgi machine dapm widgets */
345 Please see soc-dapm.h for all other widgets that support events.
354   /* dapm event types */