From 69208a20c1ad40010f6713bc93f09e12ad78515b Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Date: Thu, 4 Jul 2024 12:48:07 +0200
Subject: [PATCH] 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>
---
 src/audio/multiband_drc/Kconfig              |  4 ++--
 src/audio/multiband_drc/llext/CMakeLists.txt |  8 ++++++++
 src/audio/multiband_drc/llext/llext.toml.h   |  6 ++++++
 src/audio/multiband_drc/multiband_drc.c      | 19 +++++++++++++++++++
 src/audio/multiband_drc/multiband_drc.toml   |  6 +++++-
 zephyr/CMakeLists.txt                        | 16 +++++++++++-----
 6 files changed, 51 insertions(+), 8 deletions(-)
 create mode 100644 src/audio/multiband_drc/llext/CMakeLists.txt
 create mode 100644 src/audio/multiband_drc/llext/llext.toml.h

diff --git a/src/audio/multiband_drc/Kconfig b/src/audio/multiband_drc/Kconfig
index d9e61c915ccd..5adb668497a4 100644
--- a/src/audio/multiband_drc/Kconfig
+++ b/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
-	bool "Multiband Dynamic Range Compressor component"
+	depends on COMP_IIR && COMP_CROSSOVER && COMP_DRC
+	tristate "Multiband Dynamic Range Compressor component"
 	select CORDIC_FIXED
 	select COMP_BLOB
 	default n
diff --git a/src/audio/multiband_drc/llext/CMakeLists.txt b/src/audio/multiband_drc/llext/CMakeLists.txt
new file mode 100644
index 000000000000..73c0c4136c30
--- /dev/null
+++ b/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
+)
diff --git a/src/audio/multiband_drc/llext/llext.toml.h b/src/audio/multiband_drc/llext/llext.toml.h
new file mode 100644
index 000000000000..7d5ce873eeb0
--- /dev/null
+++ b/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__
diff --git a/src/audio/multiband_drc/multiband_drc.c b/src/audio/multiband_drc/multiband_drc.c
index 47c2343912c6..c6cb75bd7cb8 100644
--- a/src/audio/multiband_drc/multiband_drc.c
+++ b/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
diff --git a/src/audio/multiband_drc/multiband_drc.toml b/src/audio/multiband_drc/multiband_drc.toml
index a60bedd91287..008da93dcef0 100644
--- a/src/audio/multiband_drc/multiband_drc.toml
+++ b/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]
diff --git a/zephyr/CMakeLists.txt b/zephyr/CMakeLists.txt
index 5cdd825deb21..86248a48c947 100644
--- a/zephyr/CMakeLists.txt
+++ b/zephyr/CMakeLists.txt
@@ -869,11 +869,17 @@ if(NOT CONFIG_COMP_DRC STREQUAL "n")
 	)
 endif()
 
-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
-)
+if(CONFIG_COMP_MULTIBAND_DRC STREQUAL "m")
+	add_subdirectory(${SOF_AUDIO_PATH}/multiband_drc/llext
+			 ${PROJECT_BINARY_DIR}/multiband_drc_llext)
+	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