From f70575805708cabdedea7498aaa3f710fde4d920 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 03:29:01 +0000
Subject: [PATCH] add lvds1024*800

---
 kernel/usr/Makefile |  104 +++++++++++++++++++++++++++++++++-------------------
 1 files changed, 66 insertions(+), 38 deletions(-)

diff --git a/kernel/usr/Makefile b/kernel/usr/Makefile
index 138c18c..b1a81a4 100644
--- a/kernel/usr/Makefile
+++ b/kernel/usr/Makefile
@@ -3,59 +3,87 @@
 # kbuild file for usr/ - including initramfs image
 #
 
-klibcdirs:;
-PHONY += klibcdirs
+# cmd_bzip2, cmd_lzma, cmd_lzo, cmd_lz4 from scripts/Makefile.lib appends the
+# size at the end of the compressed file, which unfortunately does not work
+# with unpack_to_rootfs(). Make size_append no-op.
+override size_append := :
 
-suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
-datafile_y = initramfs_data.cpio$(suffix_y)
-datafile_d_y = .$(datafile_y).d
-AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
+compress-y					:= shipped
+compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP)	:= gzip
+compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2)	:= bzip2
+compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA)	:= lzma
+compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ)	:= xzmisc
+compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO)	:= lzo
+compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4)	:= lz4
+compress-$(CONFIG_INITRAMFS_COMPRESSION_ZSTD)	:= zstd
 
-# clean rules do not have CONFIG_INITRAMFS_COMPRESSION.  So clean up after all
-# possible compression formats.
-clean-files += initramfs_data.cpio*
-
-# Generate builtin.o based on initramfs_data.o
 obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
 
-# initramfs_data.o contains the compressed initramfs_data.cpio image.
-# The image is included using .incbin, a dependency which is not
-# tracked automatically.
-$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
+$(obj)/initramfs_data.o: $(obj)/initramfs_inc_data
 
-#####
-# Generate the initramfs cpio archive
+ramfs-input := $(strip $(shell echo $(CONFIG_INITRAMFS_SOURCE)))
+cpio-data :=
 
-hostprogs-y := gen_init_cpio
-initramfs   := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh
-ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
-			$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
-ramfs-args  := \
-        $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
-        $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
+# If CONFIG_INITRAMFS_SOURCE is empty, generate a small initramfs with the
+# default contents.
+ifeq ($(ramfs-input),)
+ramfs-input := $(srctree)/$(src)/default_cpio_list
+endif
 
-# $(datafile_d_y) is used to identify all files included
+ifeq ($(words $(ramfs-input)),1)
+
+# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
+# .cpio, use it directly as an initramfs.
+ifneq ($(filter %.cpio,$(ramfs-input)),)
+cpio-data := $(ramfs-input)
+endif
+
+# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
+# .cpio.*, use it directly as an initramfs, and avoid double compression.
+ifeq ($(words $(subst .cpio.,$(space),$(ramfs-input))),2)
+cpio-data := $(ramfs-input)
+compress-y := shipped
+endif
+
+endif
+
+# For other cases, generate the initramfs cpio archive based on the contents
+# specified by CONFIG_INITRAMFS_SOURCE.
+ifeq ($(cpio-data),)
+
+cpio-data := $(obj)/initramfs_data.cpio
+
+hostprogs := gen_init_cpio
+
+# .initramfs_data.cpio.d is used to identify all files included
 # in initramfs and to detect if any files are added/removed.
 # Removed files are identified by directory timestamp being updated
 # The dependency list is generated by gen_initramfs.sh -l
-ifneq ($(wildcard $(obj)/$(datafile_d_y)),)
-	include $(obj)/$(datafile_d_y)
-endif
-
-quiet_cmd_initfs = GEN     $@
-      cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-
-targets := $(datafile_y)
+-include $(obj)/.initramfs_data.cpio.d
 
 # do not try to update files included in initramfs
 $(deps_initramfs): ;
 
-$(deps_initramfs): klibcdirs
+quiet_cmd_initfs = GEN     $@
+      cmd_initfs = \
+	$(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \
+	$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
+	$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \
+	$(ramfs-input)
+
 # We rebuild initramfs_data.cpio if:
-# 1) Any included file is newer then initramfs_data.cpio
+# 1) Any included file is newer than initramfs_data.cpio
 # 2) There are changes in which files are included (added or deleted)
 # 3) If gen_init_cpio are newer than initramfs_data.cpio
-# 4) arguments to gen_initramfs.sh changes
-$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
-	$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y)
+# 4) Arguments to gen_initramfs.sh changes
+$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE
 	$(call if_changed,initfs)
+
+endif
+
+$(obj)/initramfs_inc_data: $(cpio-data) FORCE
+	$(call if_changed,$(compress-y))
+
+targets += initramfs_data.cpio initramfs_inc_data
+
+subdir-$(CONFIG_UAPI_HEADER_TEST) += include

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