asrc: enable building as an llext module

Add support for LLEXT building to asrc.

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

app/configs/lnl/modules.conf

@@ -4,4 +4,5 @@ CONFIG_COMP_FIR=m
 CONFIG_COMP_IIR=m
 CONFIG_COMP_DRC=m
 CONFIG_COMP_SRC=m
+CONFIG_COMP_ASRC=m
 CONFIG_COMP_VOLUME=m

app/configs/mtl/modules.conf

@@ -4,4 +4,5 @@ CONFIG_COMP_FIR=m
 CONFIG_COMP_IIR=m
 CONFIG_COMP_DRC=m
 CONFIG_COMP_SRC=m
+CONFIG_COMP_ASRC=m
 CONFIG_COMP_VOLUME=m

src/audio/asrc/Kconfig

@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 config COMP_ASRC
-	bool "ASRC component"
+	tristate "ASRC component"
+	default m if LIBRARY_DEFAULT_MODULAR
 	default y
 	help
 	  Select for Asynchronous sample rate conversion (ASRC)
@@ -14,7 +15,7 @@ config COMP_ASRC
 	  not have pre-computed filter coefficients for every
 	  conversion fraction that SRC does.
 
-if COMP_ASRC
+if COMP_ASRC != n
 
 rsource "Kconfig.simd"
 

src/audio/asrc/asrc.c

@@ -318,7 +318,7 @@ static int asrc_free(struct processing_module *mod)
 	struct comp_data *cd = module_get_private_data(mod);
 	struct comp_dev *dev = mod->dev;
 
-	comp_info(dev, "asrc_free()");
+	comp_dbg(dev, "asrc_free()");
 
 	rfree(cd->buf);
 	asrc_release_buffers(cd->asrc_obj);
@@ -850,8 +850,7 @@ static int asrc_reset(struct processing_module *mod)
 	struct comp_dev *dev = mod->dev;
 	struct comp_data *cd = module_get_private_data(mod);
 
-	comp_info(dev, "asrc_reset(), skew_min=%d, skew_max=%d", cd->skew_min, cd->skew_max);
-
+	comp_dbg(dev, "asrc_reset(), skew_min=%d, skew_max=%d", cd->skew_min, cd->skew_max);
 
 	/* If any resources feasible to stop */
 	if (cd->track_drift)
@@ -879,3 +878,21 @@ static const struct module_interface asrc_interface = {
 
 DECLARE_MODULE_ADAPTER(asrc_interface, ASRC_UUID, asrc_tr);
 SOF_MODULE_INIT(asrc, sys_comp_module_asrc_interface_init);
+
+#if CONFIG_COMP_ASRC_MODULE
+/* modular: llext dynamic link */
+
+#include <module/module/api_ver.h>
+#include <module/module/llext.h>
+#include <rimage/sof/user/manifest.h>
+
+#define UUID_ASRC 0x2d, 0x40, 0xb4, 0x66, 0x68, 0xb4, 0xf2, 0x42, \
+		  0x81, 0xa7, 0xb3, 0x71, 0x21, 0x86, 0x3d, 0xd4
+SOF_LLEXT_MOD_ENTRY(asrc, &asrc_interface);
+
+static const struct sof_man_module_manifest mod_manifest[] __section(".module") __used = {
+	SOF_LLEXT_MODULE_MANIFEST("ASRC", asrc_llext_entry, 1, UUID_ASRC, 2),
+};
+
+SOF_LLEXT_BUILDINFO;
+#endif

src/audio/asrc/asrc.toml

@@ -1,3 +1,7 @@
+#ifndef LOAD_TYPE
+#define LOAD_TYPE "0"
+#endif
+
 	[[module.entry]]
 	name = "ASRC"
 	uuid = "66B4402D-B468-42F2-81A7-B37121863DD4"
@@ -5,7 +9,7 @@
 	instance_count = "2"
 	domain_types = "0"
 
-	load_type = "0"
+	load_type = LOAD_TYPE
 	module_type = "9"
 	auto_start = "0"
 	sched_caps = [1, 0x00008000]

src/audio/asrc/llext/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2024 Intel Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+sof_llext_build("asrc"
+	SOURCES ../asrc.c
+		../asrc_farrow_hifi3.c
+		../asrc_farrow.c
+		../asrc_farrow_generic.c
+		../asrc_ipc4.c
+)

src/audio/asrc/llext/llext.toml.h

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

zephyr/CMakeLists.txt

@@ -612,15 +612,18 @@ zephyr_library_sources_ifdef(CONFIG_MATH_IIR_DF2T
 	${SOF_MATH_PATH}/iir_df2t.c
 )
 
-zephyr_library_sources_ifdef(CONFIG_COMP_ASRC
-	${SOF_AUDIO_PATH}/asrc/asrc.c
-	${SOF_AUDIO_PATH}/asrc/asrc_farrow_hifi3.c
-	${SOF_AUDIO_PATH}/asrc/asrc_farrow.c
-	${SOF_AUDIO_PATH}/asrc/asrc_farrow_generic.c
-)
-
-if(CONFIG_COMP_ASRC)
-	zephyr_library_sources(${SOF_AUDIO_PATH}/asrc/asrc_${ipc_suffix}.c)
+if(CONFIG_COMP_ASRC STREQUAL "m")
+	add_subdirectory(${SOF_AUDIO_PATH}/asrc/llext
+			 ${PROJECT_BINARY_DIR}/asrc_llext)
+	add_dependencies(app asrc)
+elseif(CONFIG_COMP_ASRC)
+	zephyr_library_sources(
+		${SOF_AUDIO_PATH}/asrc/asrc.c
+		${SOF_AUDIO_PATH}/asrc/asrc_farrow_hifi3.c
+		${SOF_AUDIO_PATH}/asrc/asrc_farrow.c
+		${SOF_AUDIO_PATH}/asrc/asrc_farrow_generic.c
+		${SOF_AUDIO_PATH}/asrc/asrc_${ipc_suffix}.c
+	)
 endif()
 
 zephyr_library_sources_ifdef(CONFIG_COMP_DCBLOCK