topic 回复： imx93-11x11-lpddr4x-evk can not update kernel in i.MX Processors

imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Thu, 02 Jan 2025 09:13:16 GMT

This is the full operation, please help to check which step is wrong so linux kernel changes does not goes into the Image:

$ mkdir imx-yocto-bsp

$ cd imx-yocto-bsp

$ repo init -u https://github.com/nxp-imx/imx-manifest -b imx-linux-scarthgap -m imx-6.6.36-2.1.0.xml

$ repo sync

$ export BSPDIR=$(pwd)

$ DISTRO=fsl-imx-wayland MACHINE=imx93-11x11-lpddr4x-evk source imx-setup-release.sh -b buildwayland

$ bitbake linux-imx

========================================================================================

the log shows

========================================================================================

NOTE: Your conf/bblayers.conf has been automatically updated.

Loading cache: 100% |###########################################################################################################################| Time: 0:00:01

Loaded 5717 entries from dependency cache.

Parsing recipes: 100% |#########################################################################################################################| Time: 0:00:01

Parsing of 3642 .bb files complete (3641 cached, 1 parsed). 5718 targets, 619 skipped, 17 masked, 0 errors.

NOTE: Resolving any missing task queue dependencies

Build Configuration:

BB_VERSION = "2.8.0"

BUILD_SYS = "x86_64-linux"

NATIVELSBSTRING = "universal"

TARGET_SYS = "aarch64-poky-linux"

MACHINE = "imx93-11x11-lpddr4x-evk"

DISTRO = "fsl-imx-wayland"

DISTRO_VERSION = "6.6-scarthgap"

TUNE_FEATURES = "aarch64 armv8a crc crypto"

TARGET_FPU = ""

回复： imx93-11x11-lpddr4x-evk can not update kernel

Nobita — Fri, 03 Jan 2025 07:50:59 GMT

Refers to https://community.nxp.com/t5/i-MX-Processors/Time-in-version-is-inconsistent-with-compilation-time/m-p/2021568#M232560
the kernel built time is unchanged if you do not make you own git commit, you can pass the KERNEL_DEBUG_TIMESTAMPS=1 env, thus make a full clean build of your kernel, and the kernel built time will be changed.

回复： imx93-11x11-lpddr4x-evk can not update kernel

Nobita — Fri, 03 Jan 2025 07:57:33 GMT

For your situation, I also suggest you to check your boot device, the /run/media/boot-mmcblk0p1 should be the emmc on board.

Re: imx93-11x11-lpddr4x-evk can not update kernel

Harvey021 — Sat, 04 Jan 2025 12:11:10 GMT

Try to add below two steps after adding patch.

bitbake linux-imx -f -c compile
bitbake linux-imx

Regards

Harvey

Re: imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Mon, 06 Jan 2025 06:05:51 GMT

I tried this but the build time does not change, the new commit is 877ae856160db41ab7a76d9e2767f87543ea69ce as from above post

回复： imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Mon, 06 Jan 2025 06:06:24 GMT

the new commit is 877ae856160db41ab7a76d9e2767f87543ea69ce as from above post added to the source but time does not change

回复： imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Mon, 06 Jan 2025 06:07:16 GMT

besides the usb device there is one boot device so i think is should be the one

root@imx93-11x11-lpddr4x-evk:~# ls /run/media/
Colin_USB-sda1 boot-mmcblk0p1

Re: imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Mon, 06 Jan 2025 06:43:52 GMT

Found that the changes are actually in the Image, but the build time remains unchange even if adding new patch to the kernel source , adding KERNEL_DEBUG_TIMESTAMPS=1 via command like
KERNEL_DEBUG_TIMESTAMPS=1 bitbake linux-imx
still not update the time, current will add custom debug kernel message to check if image is updated, if there is other way to trigger the time update please reply, or I can mark this as temp solution. thanks

回复： imx93-11x11-lpddr4x-evk can not update kernel

Nobita — Mon, 06 Jan 2025 09:33:36 GMT

the following patch should work:

diff --git a/meta/lib/oe/reproducible.py b/meta/lib/oe/reproducible.py index 9ac75c02e3..ddce9e3a9d 100644 --- a/meta/lib/oe/reproducible.py +++ b/meta/lib/oe/reproducible.py @@ -6,6 +6,7 @@ import os import subprocess import bb +import time # For reproducible builds, this code sets the default SOURCE_DATE_EPOCH in each # component's build environment. The format is number of seconds since the @@ -153,6 +154,8 @@ def fixed_source_date_epoch(d): return 0 def get_source_date_epoch(d, sourcedir): + if 1 == 1: + return int(time.time()) return ( get_source_date_epoch_from_git(d, sourcedir) or get_source_date_epoch_from_youngest_file(d, sourcedir) or

回复： imx93-11x11-lpddr4x-evk can not update kernel

lykaios1203 — Tue, 07 Jan 2025 02:17:28 GMT

Applied this patch but proc version still shows the same time:

diff --git a/meta/lib/oe/reproducible.py b/meta/lib/oe/reproducible.py
index 448befce33..4d76405deb 100644
--- a/meta/lib/oe/reproducible.py
+++ b/meta/lib/oe/reproducible.py
@@ -6,6 +6,7 @@
import os
import subprocess
import bb
+import time

# For reproducible builds, this code sets the default SOURCE_DATE_EPOCH in each
# component's build environment. The format is number of seconds since the
@@ -156,6 +157,8 @@ def fixed_source_date_epoch(d):
return 0

def get_source_date_epoch(d, sourcedir):
+ if 1 == 1:
+ return int(time.time())
return (
get_source_date_epoch_from_git(d, sourcedir) or
get_source_date_epoch_from_youngest_file(d, sourcedir) or

root@imx93-11x11-lpddr4x-evk:~# cat /proc/version
Linux version 6.6.36-lts-next-g877ae856160d-dirty (oe-user@oe-host) (aarch64-poky-linux-gcc (GCC) 13.3.0, GNU ld (GNU Binutils) 2.42.0.20240716) #1 SMP PREEMPT Wed Sep 4 08:22:45 UTC 2024

Changes still goes into the Image as the new kernel log contain new build msg

BTW adding this patch will introduce logs like

ERROR: When reparsing /home/colin/Desktop/Work_Files/I3C/nxp_bsp/imx-yocto-bsp/sources/meta-imx/meta-imx-bsp/recipes-kernel/linux/linux-imx_6.6.bb:do_create_sp
dx, the basehash value changed from 1cf6a19055bc4176f091ff31f0f7d0d39f972ed4820a2253065969871965d77d to 31f5333b4a6c41d760b3c9ccfdb72ce0eebb2e7f9c5d6e7655f4d18
3dc56612e. The metadata is not deterministic and this needs to be fixed.
ERROR: The following commands may help:
ERROR: $ bitbake linux-imx -cdo_create_spdx -Snone
ERROR: Then:
ERROR: $ bitbake linux-imx -cdo_create_spdx -Sprintdiff

there are 160 error with this, but built image still generate and can work, when i revert the change for adding time in py, the errors are gone, not sure if this is related