build: fix incomplete initramfs compression options

Requires: tools/lz4, tools/lzop

complete the wiring so that these options work:
* `CONFIG_KERNEL_INITRAMFS_COMPRESSION_LZO`
* `CONFIG_KERNEL_INITRAMFS_COMPRESSION_LZ4`

Signed-off-by: Tony Butler <[email protected]>
[remove blocking dependencies for separate ramdisk, fix lzop options]
Signed-off-by: Daniel Golle <[email protected]>

config/Config-images.in

@@ -37,11 +37,9 @@ menu "Target Images"
 				bool "lzma"
 
 			config TARGET_INITRAMFS_COMPRESSION_LZO
-				depends on !TARGET_ROOTFS_INITRAMFS_SEPARATE
 				bool "lzo"
 
 			config TARGET_INITRAMFS_COMPRESSION_LZ4
-				depends on !TARGET_ROOTFS_INITRAMFS_SEPARATE
 				bool "lz4"
 
 			config TARGET_INITRAMFS_COMPRESSION_XZ

include/image-commands.mk

@@ -277,7 +277,9 @@ endef
 define Build/initrd_compression
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),.bzip2) \
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),.gzip) \
+	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),.lz4) \
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),.lzma) \
+	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),.lzo) \
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),.xz) \
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),.zstd)
 endef

include/kernel-defaults.mk

@@ -179,10 +179,10 @@ endif
 	$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(KERNEL_BUILD_DIR)/initrd.cpio)
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),bzip2 -9 -c < $(KERNEL_BUILD_DIR)/initrd.cpio > $(KERNEL_BUILD_DIR)/initrd.cpio.bzip2)
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),gzip -n -f -S .gzip -9n $(KERNEL_BUILD_DIR)/initrd.cpio)
+	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),$(STAGING_DIR_HOST)/bin/lz4c -l -c1 -fz --favor-decSpeed $(KERNEL_BUILD_DIR)/initrd.cpio)
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),$(STAGING_DIR_HOST)/bin/lzma e -lc1 -lp2 -pb2 $(KERNEL_BUILD_DIR)/initrd.cpio $(KERNEL_BUILD_DIR)/initrd.cpio.lzma)
-# ?	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),)
+	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),$(STAGING_DIR_HOST)/bin/lzop -9 -f $(KERNEL_BUILD_DIR)/initrd.cpio)
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),$(STAGING_DIR_HOST)/bin/xz -T$(if $(filter 1,$(NPROC)),2,0) -9 -fz --check=crc32 $(KERNEL_BUILD_DIR)/initrd.cpio)
-# ?	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),)
 	$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),$(STAGING_DIR_HOST)/bin/zstd -T0 -f -o $(KERNEL_BUILD_DIR)/initrd.cpio.zstd $(KERNEL_BUILD_DIR)/initrd.cpio)
 endif
 	+$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all) modules