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Original question:

Linux/AM5728: U-Boot fails on IDK

Linux/AM5728: Error / warning during boot vs not working LCD

Jacek Kosno
Prodigy 20 points
Part Number: AM5728
Other Parts Discussed in Thread: AM5718,

Tool/software: Linux

Hello,

Recently we've connected LCD to our TMDXIDK5728 board unfortunatelly without any result. LCD is still blank. Soard itself is starting and working properly.
I've went through few threads about similar problems but nothing resolved my issue. 

During boot of myboard with linux onboard I can see some erros and warnings like :

Trying to boot from MMC1
no pinctrl state for default mode
no pinctrl state for default mode
*** Warning - bad CRC, using default environment

GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
part_get_info_efi: *** ERROR: Invalid GPT ***
GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
part_get_info_efi: *** ERROR: Invalid Backup GPT ***

** Unable to read file boot.scr **

 

I'll add that same system is working on second board with LCD. In Weston logs I can see:

[14:52:03.181] warning: no input devices on entering Weston. Possible causes:
- no permissions to read /dev/input/event*
- seats misconfigured (Weston backend option 'seat', udev device property ID_SEAT)
[14:52:03.181] failed to create input devices
[14:52:03.303] fatal: failed to create compositor backend

I would like to know if those errors might cause LCD mafunction and if I sould be worried about them at all.

Regards,

Jacek



 

  • 0
    TI__Guru* 80190 points
    Hello,

    Please try to connect a mouse or you could add require-input=false option to [core] section in /etc/weston.ini file.
    You could check this link for more information:
    manpages.ubuntu.com/.../weston.ini.5.html

    Hope this helps.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    TI__Guru* 80190 points
    Hello,

    I am seeing same message on EVM :
    CPU : DRA752-GP ES2.0
    Model: TI AM572x EVM Rev A3
    Board: AM572x EVM REV A.30
    DRAM: 2 GiB
    MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
    *** Warning - bad CRC, using default environment

    GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
    part_get_info_efi: *** ERROR: Invalid GPT ***
    GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
    part_get_info_efi: *** ERROR: Invalid Backup GPT ***
    ...
    reading boot.scr
    ** Unable to read file boot.scr **
    reading uEnv.txt
    708 bytes read in 4 ms (172.9 KiB/s)
    Loaded env from uEnv.txt
    Importing environment from mmc0 ...
    ...

    and my display is working perfectly fine.

    Hope this helps.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Prodigy 20 points
    Hello Margarita,

    You were right, I forgot about Weston configuration, unfortunatelly my LCD is still black after modifying ini file.

    Weston looks quite ok now:

    [14:52:03.065] warning: no input devices found, but none required as per configuration.
    [14:52:03.065] No currently active connector found.
    [14:52:03.066] Registered plugin API 'weston_drm_output_api_v1' of size 12
    [14:52:03.066] Compositor capabilities:
    arbitrary surface rotation: yes
    screen capture uses y-flip: yes
    presentation clock: CLOCK_MONOTONIC, id 1
    presentation clock resolution: 0.000000001 s
    [14:52:03.075] Loading module '/usr/lib/weston/desktop-shell.so'
    [14:52:03.092] launching '/usr/libexec/weston-keyboard'
    [14:52:03.094] launching '/usr/libexec/weston-desktop-shell'
    could not load cursor 'dnd-move'
    could not load cursor 'dnd-move'
    could not load cursor 'dnd-copy'
    could not load cursor 'dnd-copy'
    could not load cursor 'dnd-none'
    could not load cursor 'dnd-none'

    Thanks for checking those errors, it looks like issue with my LCD.

    Thanks,
    Jacek
  • 0 in reply to Jacek Kosno
    TI__Guru* 80190 points
    Hello,

    1.Please check this thread regarding first question( GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645 error):
    e2e.ti.com/.../693448

    2. Please take a look into this guides:
    www.ti.com/.../sprw293a.pdf
    and this training video for " Bringing Up the AM57x Industrial Development Kit (IDK) LCD on the AM5718/AM5728 IDK EVM"
    training.ti.com/am57x-idk-lcd-bringup

    Hope this helps.

    BR
    Margarita