kernel: Rework how DTB/DTBO are built

* Remove the separate dtbo.mk task and merge it
  in kernel.mk
* Merge in-kernel and separated DTBO image generation

Change-Id: I2cae84095cbd3d68abbe1899a9cae34c8a1e5fc9

build/tasks/dtbo.mk

@@ -1,30 +0,0 @@
-ifneq ($(TARGET_NO_KERNEL),true)
-ifeq ($(strip $(BOARD_KERNEL_SEPARATED_DTBO)),true)
-
-ifneq ($(BOARD_CUSTOM_DTBOIMG_MK),)
-include $(BOARD_CUSTOM_DTBOIMG_MK)
-else
-
-MKDTIMG := $(HOST_OUT_EXECUTABLES)/mkdtimg$(HOST_EXECUTABLE_SUFFIX)
-
-# Most specific paths must come first in possible_dtbo_dirs
-possible_dtbo_dirs = $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts $(KERNEL_OUT)/arch/arm/boot/dts
-
-define build-dtboimage-target
-    $(call pretty,"Target dtbo image: $(BOARD_PREBUILT_DTBOIMAGE)")
-    $(hide) for dir in $(possible_dtbo_dirs); do \
-                if [ -d "$$dir" ]; then \
-                    dtbo_dir="$$dir"; \
-                    break; \
-                fi; \
-            done; \
-            $(MKDTIMG) create $@ --page_size=$(BOARD_KERNEL_PAGESIZE) $$(find "$$dtbo_dir" -type f -name '*.dtbo' | sort)
-    $(hide) chmod a+r $@
-endef
-
-$(BOARD_PREBUILT_DTBOIMAGE): $(MKDTIMG) $(INSTALLED_KERNEL_TARGET)
-	$(build-dtboimage-target)
-
-endif # BOARD_CUSTOM_DTBOIMG_MK
-endif # BOARD_KERNEL_SEPARATED_DTBO
-endif # TARGET_NO_KERNEL

build/tasks/kernel.mk

@@ -69,8 +69,9 @@ SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG)
 
 ## Internal variables
 DTC := $(HOST_OUT_EXECUTABLES)/dtc
-DTBS_OUT := $(PRODUCT_OUT)/dtbs
 KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+DTBO_OUT := $(TARGET_OUT_INTERMEDIATES)/DTBO_OBJ
+DTB_OUT := $(TARGET_OUT_INTERMEDIATES)/DTB_OBJ
 KERNEL_CONFIG := $(KERNEL_OUT)/.config
 KERNEL_RELEASE := $(KERNEL_OUT)/include/config/kernel.release
 
@@ -227,13 +228,13 @@ endef
 # Make a DTBO target
 # $(1): The DTBO target to build (eg. dtbo.img, defconfig)
 define make-dtbo-target
-$(call internal-make-kernel-target,$(PRODUCT_OUT)/dtbo,$(1))
+$(call internal-make-kernel-target,$(DTBO_OUT),$(1))
 endef
 
 # Make a DTB targets
 # $(1): The DTB target to build (eg. dtbs, defconfig)
 define make-dtb-target
-$(call internal-make-kernel-target,$(DTBS_OUT),$(1))
+$(call internal-make-kernel-target,$(DTB_OUT),$(1))
 endef
 
 $(KERNEL_OUT):
@@ -295,14 +296,33 @@ alldefconfig: $(KERNEL_OUT)
 	env KCONFIG_NOTIMESTAMP=true \
 		 $(call make-kernel-target,alldefconfig)
 
-ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
+ifeq (true,$(filter true, $(TARGET_NEEDS_DTBOIMAGE) $(BOARD_KERNEL_SEPARATED_DTBO)))
 MKDTIMG := $(HOST_OUT_EXECUTABLES)/mkdtimg$(HOST_EXECUTABLE_SUFFIX)
 MKDTBOIMG := $(HOST_OUT_EXECUTABLES)/mkdtboimg.py$(HOST_EXECUTABLE_SUFFIX)
 $(BOARD_PREBUILT_DTBOIMAGE): $(DTC) $(MKDTIMG) $(MKDTBOIMG)
-	echo -e ${CL_GRN}"Building DTBO.img"${CL_RST}
+ifeq ($(BOARD_KERNEL_SEPARATED_DTBO),true)
+$(BOARD_PREBUILT_DTBOIMAGE):
+	@echo "Building dtbo.img"
+	$(call make-dtbo-target,$(KERNEL_DEFCONFIG))
+	$(call make-dtbo-target,dtbs)
+	$(MKDTIMG) create $@ --page_size=$(BOARD_KERNEL_PAGESIZE) $(shell find $(DTBO_OUT)/arch/$(KERNEL_ARCH)/boot/dts -type f -name "*.dtbo" | sort)
+else
+$(BOARD_PREBUILT_DTBOIMAGE):
+	@echo "Building dtbo.img"
 	$(call make-dtbo-target,$(KERNEL_DEFCONFIG))
 	$(call make-dtbo-target,dtbo.img)
-endif # TARGET_NEEDS_DTBOIMAGE
+endif # BOARD_KERNEL_SEPARATED_DTBO
+endif # TARGET_NEEDS_DTBOIMAGE/BOARD_KERNEL_SEPARATED_DTBO
+
+ifeq ($(BOARD_INCLUDE_DTB_IN_BOOTIMG),true)
+ifeq ($(BOARD_PREBUILT_DTBIMAGE_DIR),)
+$(INSTALLED_DTBIMAGE_TARGET): $(DTC)
+	@echo "Building dtb.img"
+	$(call make-dtb-target,$(KERNEL_DEFCONFIG))
+	$(call make-dtb-target,dtbs)
+	cat $(shell find $(DTB_OUT)/arch/$(KERNEL_ARCH)/boot/dts -type f -name "*.dtb" | sort) > $@
+endif # !BOARD_PREBUILT_DTBIMAGE_DIR
+endif # BOARD_INCLUDE_DTB_IN_BOOTIMG
 
 endif # FULL_KERNEL_BUILD
 
@@ -317,25 +337,13 @@ $(file) : $(KERNEL_BIN) | $(ACP)
 ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET)
 endif
 
-INSTALLED_DTBOIMAGE_TARGET := $(PRODUCT_OUT)/dtbo.img
-ALL_PREBUILT += $(INSTALLED_DTBOIMAGE_TARGET)
-
 .PHONY: kernel
 kernel: $(INSTALLED_KERNEL_TARGET)
 
 .PHONY: dtboimage
 dtboimage: $(INSTALLED_DTBOIMAGE_TARGET)
 
-ifeq ($(BOARD_INCLUDE_DTB_IN_BOOTIMG),true)
-ifeq ($(BOARD_PREBUILT_DTBIMAGE_DIR),)
-$(INSTALLED_DTBIMAGE_TARGET): $(DTC)
-	echo -e ${CL_GRN}"Building DTBs"${CL_RST}
-	$(call make-dtb-target,$(KERNEL_DEFCONFIG))
-	$(call make-dtb-target,dtbs)
-	cat $(shell find $(DTBS_OUT)/arch/$(KERNEL_ARCH)/boot/dts/** -type f -name "*.dtb" | sort) > $@
-endif
 .PHONY: dtbimage
 dtbimage: $(INSTALLED_DTBIMAGE_TARGET)
-endif # BOARD_INCLUDE_DTB_IN_BOOTIMG
 
 endif # TARGET_NO_KERNEL

config/BoardConfigKernel.mk

@@ -131,10 +131,8 @@ TOOLS_PATH_OVERRIDE := \
     PERL5LIB=$(BUILD_TOP)/prebuilts/tools-lineage/common/perl-base
 
 # Set DTBO image locations so the build system knows to build them
-ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
-BOARD_PREBUILT_DTBOIMAGE ?= $(PRODUCT_OUT)/dtbo/arch/$(KERNEL_ARCH)/boot/dtbo.img
-else ifeq ($(BOARD_KERNEL_SEPARATED_DTBO),true)
-BOARD_PREBUILT_DTBOIMAGE ?= $(PRODUCT_OUT)/dtbo-pre.img
+ifeq (true,$(filter true, $(TARGET_NEEDS_DTBOIMAGE) $(BOARD_KERNEL_SEPARATED_DTBO)))
+BOARD_PREBUILT_DTBOIMAGE ?= $(TARGET_OUT_INTERMEDIATES)/DTBO_OBJ/arch/$(KERNEL_ARCH)/boot/dtbo.img
 endif
 
 # Set use the full path to the make command