With current kernel reaching 5MB uncompressed, several devices failed
to boot. They either fails on lzma decompression or ends up with a
corrupted kernel image. We already faced this problem two years ago
and it was solved by limiting LZMA dictionary size. Our own lzma-loader
extracts data without this limit just fine and lifting this limit saves
15KB kernel space when compressed.
mediatek u-boot 1.1.3 comes with support for uncompressed uimage by
default and ideally no vendor bother to remove this support.
This commit uses uncompressed uimage with lzma-loader for all mt7621
devices with default kernel template.
Signed-off-by: Chuanhong Guo <gch981...@gmail.com>
---
D-Link DIR-860L B1 needs a different loader implementation and isn't
covered by this patch.
Please help testing this patch on top of current master:
75f19deb3a ramips: define image recipe for uncompressed uimage with loader
1. If your device fails to boot after 5.4 switch for mt7621:
Is the problem fixed by this patch?
2. Other devices:
Does this patch break your router?
Thanks in advance!
target/linux/ramips/image/Makefile | 4 ++++
target/linux/ramips/image/mt7621.mk | 1 -
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/target/linux/ramips/image/Makefile
b/target/linux/ramips/image/Makefile
index a966ba4349..1fb37d7c6c 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -27,7 +27,11 @@ LOADER_PLATFORM := $(ldrplatform-y)
KERNEL_DTB = kernel-bin | append-dtb | lzma
define Device/Default
PROFILES = Default
+ifeq ($(SUBTARGET),mt7621)
+ $(Device/uimage-lzma-loader)
+else
KERNEL := $(KERNEL_DTB) | uImage lzma
+endif
SOC := $(DEFAULT_SOC)
DEVICE_DTS_DIR := ../dts
DEVICE_DTS = $$(SOC)_$(1)
diff --git a/target/linux/ramips/image/mt7621.mk
b/target/linux/ramips/image/mt7621.mk
index 8980ff70d4..942308c29a 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -6,7 +6,6 @@ include ./common-tp-link.mk
DEFAULT_SOC := mt7621
-KERNEL_DTB += -d21
DEVICE_VARS += UIMAGE_MAGIC SERCOMM_HWNAME
# The OEM webinterface expects an kernel with initramfs which has the uImage
--
2.25.2
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