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Im trying to enable earlyprintk in GLSDK on jacinto6

yangwoo Lee
Intellectual 910 points

Hello

Im trying to enable earlyprintk in GLSDK on jacinto6

I saw "earlyprintk" in my cmdline so I did below things

But still not working. please help me. I don't know what is correct select in my board.

menuconfig
Kernel hacking-> [*] Kernel low-level debugging functions->[*]Kernel low-level debugging port (OMAP2/3/4 UART1 (omap2/3 sdp boards...
                                [*] Early printk

 

 

  • 0
    TI__Mastermind 43955 points
    Hi Yangwoo Lee,

    Did you define and use earlyprintk in bootcmd of u-boot ?

    Please refer to the following link.

    blackfin.uclinux.org/doku.php
  • 0
    TI__Mastermind 29520 points

    Hello Yangwoo,

    Could you check in your uenv.txt file for arguments below?

    mmcargs=part uuid mmc 0:2 uuid; setenv bootargs "console=ttyO0,115200n8 elevator=noop root=PARTUUID=${uuid} rw rootwait earlyprintk fixrtc omapdrm.num_crtc=2 consoleblank=0 cma=64M rootfstype=ext4 snd.slots_reserved=1,1"

    Try to enable # CONFIG_TTY_PRINTK is not set in your .config file.

    # Non-8250 serial port support
    #
    # CONFIG_TTY_PRINTK is not set

    Try to set in .config file:

    #
    # Boot options
    #
    CONFIG_USE_OF=y
    CONFIG_ATAGS=y
    # CONFIG_DEPRECATED_PARAM_STRUCT is not set
    CONFIG_ZBOOT_ROM_TEXT=0x0
    CONFIG_ZBOOT_ROM_BSS=0x0
    CONFIG_ARM_APPENDED_DTB=y
    CONFIG_ARM_ATAG_DTB_COMPAT=y
    CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y
    # CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
    CONFIG_CMDLINE="root=/dev/mmcblk0p2 rootwait console=ttyO2,115200"
    CONFIG_CMDLINE_FROM_BOOTLOADER=y
    # CONFIG_CMDLINE_EXTEND is not set
    # CONFIG_CMDLINE_FORCE is not set
    CONFIG_KEXEC=y
    CONFIG_ATAGS_PROC=y
    # CONFIG_CRASH_DUMP is not set
    CONFIG_AUTO_ZRELADDR=y

    Take a look on:

    http://elinux.org/Debugging_OMAP_kernel

    e2e.ti.com/.../350101

    Best regards,

    Yanko

  • 0 in reply to Yanko Todorov-XID
    Intellectual 910 points
    Hello Yankobelow is my .config items regarding DEBUG
    CONFIG_DEBUG_LL=y CONFIG_DEBUG_OMAP2UART1=y CONFIG_DEBUG_OMAP2PLUS_UART=y CONFIG_DEBUG_LL_INCLUDE="debug/omap2plus.S"
    CONFIG_EARLY_PRINTK=yAnd I also can see "earlyprintk" in my uenv.txt
    But still I can't see message for earlyprintk in kernel boot logThank you
  • 0 in reply to yangwoo Lee
    Intellectual 910 points
    Sorry I missed log regarding earlyprintk... because kernel was not bootup...
    I can see earlyprintk message now.Thank you for helping me.