Hi,
Kernel prints are not coming while booting Linux 4.1.15 on custom imx6ull board. I am using UART 8 as my debug port, related to that I have done configuration in boot arguments at U-boot, Kernel and rootfs. While booting I am able to get complete u-boot prints, but after Starting kernel ... print comes, it will skip the kernel prints and again it will start somewhere in the middle. Below are my boot logs,
Booting using the fdt blob at 0x83000000 Using Device Tree in place at 83000000, end 8300b59d Starting kernel ... fxas2100x 3-0020: read chip ID 0xfffffff5 is not equal to 0xd1 for fxas21000 or 0xd6/0xd7 fxas21002! no file given for LUN0 g_mass_storage ci_hdrc.0: failed to start g_mass_storage: -22 mag3110 3-000e: read chip ID 0xfffffff5 is not equal to 0xc4! cpu cpu0: dev_pm_opp_get_opp_count: device OPP not found (-19) INIT: version 2.88 booting Starting udev udevd[94]: bind failed: No such file or directory error binding udev control socket udevd[94]: error binding udev control socket bootlogd: cannot allocate pseudo tty: No such file or directory Populating dev cache udev-cache: update failed! Fri Feb 3 10:52:52 UTC 2017 INIT: Entering runlevel: 5 Configuring network interfaces... ifconfig: SIOCGIFFLAGS: No such device ifconfig: SIOCGIFFLAGS: No such device Starting system message bus: dbus. Starting syslogd/klogd: done
After this prints system will get hung. Could you please suggest me to resolve this issue?
Thanks and Regards
Rohithraj
Hi Igor,
Thanks for the response.
I tried by running the DDR test and updating the DDR calibration coefficients but still not resolved.
Thanks and Regards
Rohithraj
Hi Rohithraj
what uboot used in the case, is it nxp uboot from
source.codeaurora.org/external/imx/uboot-imx repository
mx6ullevk\freescale\board - uboot-imx - i.MX U-Boot
Best regards
igor
Hi Igor,
Yes. We are using NXP u-boot.
Thanks and Regards,
Rohithraj
Hi Rohithraj
one can debug it using AN4553 Using Open Source Debugging Tools for Linux on i.MX Processors
https://www.nxp.com/docs/en/application-note/AN4553.pdf
Best regards
igor
Hi Rohithraj
for custom board recommended first run ddr test
i.MX6/7 DDR Stress Test Tool V3.00
and update uboot *.cfg file with new ddr calibration coefficients
found from test
mx6ullevk\freescale\board - uboot-imx - i.MX U-Boot
Best regards
igor
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