Managing the Components¶

The components management functionality is declared in audio/component.h and implemented in audio/component.c.

It provides APIs for component drivers and component clients.

package component-mgmt {
class "component API" <<unit>> {
comp_new(sof_ipc_comp*)
comp_register(comp_driver*)
comp_unregister(comp_driver*)
comp_set_state(comp_dev*, cmd)
...
sys_comp_init(void)
}

class comp_data {
list
}
hide comp_data methods

"component API" -right-> comp_data : drv_get()

}
note right of comp_data
Singleton allocated in RZONE_SYS
by sys_comp_init()
end note

"component API" <-up- comp_driver : registers in comp_register()

comp_driver -o comp_data

hide comp_driver members
hide comp_driver methods — Figure 5 Component Management API¶

Initialization¶

Audio unit initialization routine calls sys_comp_init() to perform allocation of the comp_data which maintains the list of registered component drivers.