multiband_drc: enable building as an llext module

Add support for LLEXT building to multiband_drc.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

app/configs/lnl/modules.conf

@@ -14,4 +14,5 @@ CONFIG_COMP_IGO_NR=m
 CONFIG_COMP_VOLUME=m
 CONFIG_COMP_DCBLOCK=m
 CONFIG_COMP_CROSSOVER=m
+CONFIG_COMP_MULTIBAND_DRC=m
 CONFIG_COMP_GOOGLE_CTC_AUDIO_PROCESSING=m

app/configs/mtl/modules.conf

@@ -14,4 +14,5 @@ CONFIG_COMP_IGO_NR=m
 CONFIG_COMP_VOLUME=m
 CONFIG_COMP_DCBLOCK=m
 CONFIG_COMP_CROSSOVER=m
+CONFIG_COMP_MULTIBAND_DRC=m
 CONFIG_COMP_GOOGLE_CTC_AUDIO_PROCESSING=m

src/audio/multiband_drc/Kconfig

@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 config COMP_MULTIBAND_DRC
-	depends on COMP_IIR && COMP_CROSSOVER && COMP_DRC = y
+	depends on COMP_IIR && COMP_CROSSOVER && COMP_DRC
-	bool "Multiband Dynamic Range Compressor component"
+	tristate "Multiband Dynamic Range Compressor component"
 	select CORDIC_FIXED
 	select COMP_BLOB
 	default n

src/audio/multiband_drc/llext/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Intel Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+sof_llext_build("multiband_drc"
+	SOURCES ../multiband_drc.c
+		../multiband_drc_generic.c
+		../multiband_drc_ipc4.c
+)

src/audio/multiband_drc/llext/llext.toml.h

@@ -0,0 +1,6 @@
+#include <tools/rimage/config/platform.toml>
+#define LOAD_TYPE "2"
+#include "../multiband_drc.toml"
+
+[module]
+count = __COUNTER__

src/audio/multiband_drc/multiband_drc.c

@@ -419,3 +419,22 @@ static const struct module_interface multiband_drc_interface = {
 
 DECLARE_MODULE_ADAPTER(multiband_drc_interface, multiband_drc_uuid, multiband_drc_tr);
 SOF_MODULE_INIT(multiband_drc, sys_comp_module_multiband_drc_interface_init);
+
+#if CONFIG_COMP_MULTIBAND_DRC_MODULE
+/* modular: llext dynamic link */
+
+#include <module/module/api_ver.h>
+#include <module/module/llext.h>
+#include <rimage/sof/user/manifest.h>
+
+#define UUID_MULTIBAND_DRC 0x56, 0x22, 0x9F, 0x0D, 0x4F, 0x8E, 0xB3, 0x47, 0x48, 0x84, \
+		0x23, 0x9A, 0x33, 0x4F, 0x11, 0x91
+
+SOF_LLEXT_MOD_ENTRY(multiband_drc, &multiband_drc_interface);
+
+static const struct sof_man_module_manifest mod_manifest __section(".module") __used =
+	SOF_LLEXT_MODULE_MANIFEST("MB_DRC", multiband_drc_llext_entry, 1, UUID_MULTIBAND_DRC, 40);
+
+SOF_LLEXT_BUILDINFO;
+
+#endif

src/audio/multiband_drc/multiband_drc.toml

@@ -1,3 +1,7 @@
+#ifndef LOAD_TYPE
+#define LOAD_TYPE "0"
+#endif
+
 	REM # Multiband-DRC module config
 	[[module.entry]]
 	name = "MB_DRC"
@@ -5,7 +9,7 @@
 	affinity_mask = "0x1"
 	instance_count = "40"
 	domain_types = "0"
-	load_type = "0"
+	load_type = LOAD_TYPE
 	module_type = "9"
 	auto_start = "0"
 	sched_caps = [1, 0x00008000]

zephyr/CMakeLists.txt

@@ -869,11 +869,17 @@ if(NOT CONFIG_COMP_DRC STREQUAL "n")
 	)
 endif()
 
-zephyr_library_sources_ifdef(CONFIG_COMP_MULTIBAND_DRC
+if(CONFIG_COMP_MULTIBAND_DRC STREQUAL "m")
-	${SOF_AUDIO_PATH}/multiband_drc/multiband_drc.c
+	add_subdirectory(${SOF_AUDIO_PATH}/multiband_drc/llext
-	${SOF_AUDIO_PATH}/multiband_drc/multiband_drc_generic.c
+			 ${PROJECT_BINARY_DIR}/multiband_drc_llext)
-	${SOF_AUDIO_PATH}/multiband_drc/multiband_drc_${ipc_suffix}.c
+	add_dependencies(app multiband_drc)
-)
+elseif(CONFIG_COMP_MULTIBAND_DRC)
+	zephyr_library_sources_ifdef(CONFIG_COMP_MULTIBAND_DRC
+		${SOF_AUDIO_PATH}/multiband_drc/multiband_drc.c
+		${SOF_AUDIO_PATH}/multiband_drc/multiband_drc_generic.c
+		${SOF_AUDIO_PATH}/multiband_drc/multiband_drc_${ipc_suffix}.c
+	)
+endif()
 
 zephyr_library_sources_ifdef(CONFIG_COMP_GOOGLE_RTC_AUDIO_PROCESSING
 	${SOF_AUDIO_PATH}/google/google_rtc_audio_processing.c