platform: Move configuration from Zephyr to SOF

Move software configuration from Zephyr samples directory
to SOF platforms directory using Zephyr overlay mechanism.
How it works:
1. Gets zephyr board defconfig values
2. Applies Zephyr samples prj.conf values on top of it
3. Then applies our new overlay.conf on top of it
4. Final "summary" of Kconfig settings is written to autoconf.h header

Signed-off-by: Andrey Borisovich <andrey.borisovich@intel.com>

overlays/apl/overlay.conf

@@ -0,0 +1,7 @@
+CONFIG_APOLLOLAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_LP_MEMORY_BANKS=2
+CONFIG_HP_MEMORY_BANKS=8
+CONFIG_PERFORMANCE_COUNTERS=y
+CONFIG_COMP_SRC_TINY=y

overlays/cnl/overlay.conf

@@ -0,0 +1,7 @@
+CONFIG_CANNONLAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_INTEL_ALH=y
+CONFIG_LP_MEMORY_BANKS=1
+CONFIG_HP_MEMORY_BANKS=47
+CONFIG_PERFORMANCE_COUNTERS=y

overlays/icl/overlay.conf

@@ -0,0 +1,6 @@
+CONFIG_ICELAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_INTEL_ALH=y
+CONFIG_LP_MEMORY_BANKS=1
+CONFIG_HP_MEMORY_BANKS=47

overlays/imx8/overlay.conf

@@ -0,0 +1,4 @@
+CONFIG_IMX8=y
+CONFIG_HAVE_AGENT=n
+CONFIG_FORMAT_CONVERT_HIFI3=n
+CONFIG_KPB_FORCE_COPY_TYPE_NORMAL=n

overlays/imx8m/overlay.conf

@@ -0,0 +1,4 @@
+CONFIG_IMX8M=y
+CONFIG_HAVE_AGENT=n
+CONFIG_FORMAT_CONVERT_HIFI3=n
+CONFIG_KPB_FORCE_COPY_TYPE_NORMAL=n

overlays/imx8x/overlay.conf

@@ -0,0 +1,4 @@
+CONFIG_IMX8X=y
+CONFIG_HAVE_AGENT=n
+CONFIG_FORMAT_CONVERT_HIFI3=n
+CONFIG_KPB_FORCE_COPY_TYPE_NORMAL=n

overlays/jsl/overlay.conf

@@ -0,0 +1,5 @@
+CONFIG_ICELAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_LP_MEMORY_BANKS=1
+CONFIG_HP_MEMORY_BANKS=16

overlays/tgl-h/overlay.conf

@@ -0,0 +1,7 @@
+CONFIG_TIGERLAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_INTEL_ALH=y
+CONFIG_LP_MEMORY_BANKS=1
+CONFIG_HP_MEMORY_BANKS=30
+CONFIG_RIMAGE_SIGNING_SCHEMA="tgl-h"

overlays/tgl/overlay.conf

@@ -0,0 +1,7 @@
+CONFIG_TIGERLAKE=y
+CONFIG_INTEL_DMIC=y
+CONFIG_INTEL_SSP=y
+CONFIG_INTEL_ALH=y
+CONFIG_LP_MEMORY_BANKS=1
+CONFIG_HP_MEMORY_BANKS=30
+CONFIG_RIMAGE_SIGNING_SCHEMA="tgl"

scripts/xtensa-build-zephyr.py

@@ -371,9 +371,17 @@ def build_platforms():
 		if args.cmake_args:
 			build_cmd += args.cmake_args
 
+		overlays = []
+		# You may override default overlay.conf file name using CONFIG_OVERLAY in your platform
+		# dictionary
+		overlay_filename = platform_dict.get("CONFIG_OVERLAY", "overlay.conf")
+		overlays.append(str(pathlib.Path(SOF_TOP, "overlays", platform, overlay_filename)))
+
 		if args.ipc == "IPC4":
-			overlay = pathlib.Path(SOF_TOP, "platforms", platform, platform_dict["IPC4_CONFIG_OVERLAY"])
-			build_cmd.append(f"-DOVERLAY_CONFIG={overlay}")
+			overlays.append(str(pathlib.Path(SOF_TOP, "overlays", platform, platform_dict["IPC4_CONFIG_OVERLAY"])))
+
+		overlays = ";".join(overlays)
+		build_cmd.append(f"-DOVERLAY_CONFIG={overlays}")
 
 		# Build
 		execute_command(build_cmd, check=True, cwd=west_top)

scripts/xtensa-build-zephyr.sh

@@ -236,6 +236,22 @@ build_platforms()
 				;;
 		esac
 
+		# default value if undefined
+		local config_overlay=${CONFIG_OVERLAY:-overlay.conf}
+
+		# every platform that has CONFIG_OVERLAY file is expected to have it in:
+		# overlays/<platform_name> directory
+		local CONFIG_DIR="$SOF_TOP"/overlays/"$platform"
+		local OVERLAY_FILE="$CONFIG_DIR"/"$config_overlay"
+
+		test -d "$CONFIG_DIR" ||
+			die 'Overlay configuration directory: %s does not exist, create one.' \
+					"$CONFIG_DIR"
+
+		test -f "$OVERLAY_FILE" ||
+			die 'Platform overlay file: %s does not exist. Please create one.' \
+				"$OVERLAY_FILE"
+
 		if [ -n "$XTENSA_TOOLS_ROOT" ]
 		then
 			# set variables expected by zephyr/cmake/toolchain/xcc/generic.cmake
@@ -269,7 +285,7 @@ build_platforms()
 			set -x
 			west $verbose build --build-dir "$bdir" --board "$PLAT_CONFIG" \
 				zephyr/samples/subsys/audio/sof \
-				-- "${CMAKE_ARGS[@]}"
+				-- "${CMAKE_ARGS[@]}" "-DOVERLAY_CONFIG=${OVERLAY_FILE}"
 
 			# This should ideally be part of
 			# sof/zephyr/CMakeLists.txt but due to the way