audio: wov_arbiter: add multi-slot WOV arbiter component

Add multi-slot WOV arbiter audio component to manage keyword detection events
across multiple detector pipelines, dispatch AMS slot activation and control
messages, and broadcast pause/resume commands to un-triggered slots.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Author: lrgirdwo

app/boards/intel_adsp_cavs25.conf

@@ -11,6 +11,11 @@ CONFIG_COMP_DRC=y
 CONFIG_COMP_MFCC=y
 CONFIG_COMP_MULTIBAND_DRC=y
 CONFIG_COMP_VOLUME_WINDOWS_FADE=y
+CONFIG_COMP_WOV_ARBITER=y
+CONFIG_COMP_VAD_GATE=y
+CONFIG_COMP_KPB=y
+CONFIG_SAMPLES=y
+CONFIG_SAMPLE_KEYPHRASE=y
 CONFIG_FORMAT_CONVERT_HIFI3=n
 CONFIG_PCM_CONVERTER_FORMAT_S16LE=y
 CONFIG_PCM_CONVERTER_FORMAT_S24LE=y

app/debug_overlay.conf

@@ -31,3 +31,8 @@ CONFIG_GDBSTUB_ENTER_IMMEDIATELY=n
 # Testing with runtime filtering enabled ensures the same feature set is validated.
 # Note: This setting has no effect if CONFIG_LOG_RUNTIME_FILTERING is disabled.
 CONFIG_LOG_RUNTIME_DEFAULT_LEVEL=3
+
+# Record fatal exception breadcrumbs (PC/cause/vaddr) in HP-SRAM window0 so the
+# crash is visible in the host dmesg "Firmware state" line when no console or
+# mtrace output is available.
+CONFIG_XTENSA_ADSP_FATAL_BREADCRUMB=y

app/prj.conf

@@ -49,3 +49,5 @@ CONFIG_SCHED_CPU_MASK=y
 CONFIG_SYS_CLOCK_TICKS_PER_SEC=15000
 CONFIG_DAI=y
 CONFIG_HEAP_MEM_POOL_SIZE=2048
+CONFIG_SAMPLES=y
+CONFIG_SAMPLE_KEYPHRASE=y

src/audio/CMakeLists.txt

@@ -104,9 +104,15 @@ if(NOT CONFIG_COMP_MODULE_SHARED_LIBRARY_BUILD)
 	if(CONFIG_COMP_UP_DOWN_MIXER)
 		add_subdirectory(up_down_mixer)
 	endif()
+	if(CONFIG_COMP_VAD_GATE)
+		add_subdirectory(vad_gate)
+	endif()
 	if(CONFIG_COMP_VOLUME)
 		add_subdirectory(volume)
 	endif()
+	if(CONFIG_COMP_WOV_ARBITER)
+		add_subdirectory(wov_arbiter)
+	endif()
 	if(CONFIG_DTS_CODEC)
 		add_subdirectory(codec)
 	endif()

src/audio/Kconfig

@@ -102,6 +102,18 @@ config COMP_STUBS
 	  Select to force all 3P blocks to link against stubs rather than their libraries. This
 	  should only be used in testing environments like fuzzers or CI.
 
+config COMP_WOV_ARBITER
+	bool "WOV arbiter component"
+	depends on COMP_KPB
+	depends on IPC_MAJOR_4
+	select AMS
+	help
+	  Select to build the WOV (Wake-on-Voice) arbiter.  The arbiter sits
+	  between multiple KPB host-drain outputs and a single host PCM copier.
+	  When a keyword is detected by one of the WOV detectors the arbiter
+	  routes that KPB's drain stream to the host and instructs the remaining
+	  detectors to pause.
+
 config COMP_KPB
 	bool "KPB component"
 	default y
@@ -160,6 +172,7 @@ rsource "template/Kconfig"
 rsource "tensorflow/Kconfig"
 rsource "tone/Kconfig"
 rsource "up_down_mixer/Kconfig"
+rsource "vad_gate/Kconfig"
 rsource "volume/Kconfig"
 # --- End Kconfig Sources (alphabetical order) ---
 

src/audio/wov_arbiter/CMakeLists.txt

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
+add_local_sources(sof wov_arbiter.c)