This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

DSPLink: Failed to create display device instance

Expert 4920 points

Replies: 9

Views: 5378

Hi,

I'm working on the OMAP3530 Mistral EVM. In an attempt to update to dvsdk_3_00_00_31, I rebuilt u-boot, linux kernel, the dvsdk software and the nfs image. I successfully flashed the new linux kernel as per the Getting Started Guide. I've set the bootargs and bootcmd to boot from the flash using NFS file system. Though the system initializes correctly, when the kernel attempts to start the demo application, I receive the following error:

    System initialization...

    Hostname       : OMAP3EVM
    Filesystem     : v1.0.2

    Kernel release : Linux 2.6.22.18-omap3
    Kernel version : #2 Mon Mar 30 11:39:16 CDT 2009

 Mounting /proc             : [SUCCESS]
 Mounting /sys              : [SUCCESS]
 Mounting /dev              : [SUCCESS]
 Mounting /dev/pts          : [SUCCESS]
 Enabling hot-plug          : [SUCCESS]
 Populating /dev            : [SUCCESS]
 Disabling Power mgmt       : [SUCCESS]
 Turn off LCD after 1 hour  : [SUCCESS]
 Mounting other filesystems : [SUCCESS]
 Starting syslogd           : [SUCCESS]
 Starting telnetd           : Jan  1 00:00:15 OMAP3EVM syslog.info syslogd started: BusyBox v1.9.1
[SUCCESS]

System initialization complete.
 Starting Demo Application...
ioremap_nocache(0x85800000, 16777216)=0xc7000000
allocated heap buffer 0xc7000000 of size 0xea000
cmem initialized 7 pools between 0x85800000 and 0x86800000
dsplinkk: no version for "struct_module" found: kernel tainted.
DSPLINK Module (1.51) created on Date: Aug  1 2008 Time: 19:28:58

My kernel command line is: mem=88M console=ttyS0,115200n8 noinitrd rw root=/dev/nfs nfsroot=192.168.1.100:/tmp/gurnani/workdir/filesys,nolock ip=192.168.1.10:192.168.1.100:192.168.1.1:255.255.255.0::eth0:on

I also got a message saying "Failed to create display device instance."

I'd appreciate any guidance I can get on this. Thanks!

- Uday

--- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---

  • The dsplink message is normal.  This sounds like something related to the display driver.  I recommend making another post which focuses on that.

    ---------------------------------------------------------------------------------------------------------
    http://processors.wiki.ti.com/index.php/User:BradGriffis
    --------------------------------------------------------------------------------------------------------- 

  • Expert 4920 points

    In reply to Brad Griffis:

    The only message related to the display device I'm getting is this:

    Demo interface started at level 0.
    Error: Failed to create display device instance

    Would there be more information I can provide that can help?

    Thanks!!

     

     

    - Uday

    --- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---

  • In reply to Uday:

    Has this issue been resolved?

     

    I am also having a problem running the demos.

     

    I am getting the same error:

    Error: Failed to create display device instance

    I am able to run the ./decode and get help and run the h.264 video, but can not display the UI, and clicking a button crashes the demo.

    Thanks for any help.

  • Expert 4920 points

    In reply to msj:

    The problem went away when I downgraded to dvsdk 3_00_00_30. Maybe you could try that, else post what you see on the terminal and someone who knows could jump in and help.

    - Uday

    --- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---

  • In reply to Uday:

    I am using "dvsdk_setuplinux_3_00_00_29.bin" , and I thought this was themost upto date version?

     

    and the error I am getting:

    "[root@OMAP3EVM dvsdk]# ./decode -o -v ./data/videos/davincieffect_ntsc_1.264
    Decode demo started.
    Error: Failed to create display device
    Error: Failed to create UI"

     

     

  • In reply to msj:

    There is also an interesting note in the DVSDK Getting Started Guide:

     

    "NOTE: Since the DVSDK decode demos require the OSD planes to be rotated by 90 degrees, and since
    these are the demos that will be started by the DVSDK target file system start-up scripts, using the
    bootargs as mentioned above would result in the following output at the end of the boot process. Kindly
    ignore the error message and press “enter” key on the host PC to go to the target prompt.
    System initialization complete.
    Starting Demo Application...
    ioremap_nocache(0x85800000, 16777216)=0xc7000000
    allocated heap buffer 0xc7000000 of size 0x850000
    cmem initialized 5 pools between 0x85800000 and 0x86800000
    dsplinkk: no version for "struct_module" found: kernel tainted.
    dsplinkk: module license 'DSP/BIOS(TM) LINK' taints kernel.
    DSPLINK Module (1.51.00.08) created on Date: Jun 13 2008 Time: 08:28:01
    Demo interface started at level 0.
    Interface Error: Failed to create display device instance"

    So how do we rotate the OSD planes 90 degrees?

  • Expert 4920 points

    In reply to msj:

    Add "video=omap24xxfb:rotation=90" to your bootargs.

    For example, my bootargs are set as

    "setenv bootargs mem=88M console=ttyS0,115200n8 noinitrd rootdelay=1 rw ip=dhcp root=/dev/nfs nfsroot=192.168.1.100:/home/<username>/workdir/filesys,nolock video=omap24xxfb:rotation=90"

    - Uday

    --- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---

  • In reply to Uday:

    Thanks Uday.  That did it!

    The video demo is now booting automatically and the Boot Errors are gone, and the buttons are navigating as they should without crashing.

  • Expert 4920 points

    In reply to msj:

    Glad it's working. Looking back at my kernel command line in the first post, I had that rotation=90 missing too!

    - Uday

    --- If you need more help, please reply. If this answers your question, please Verify Answer below this post ---

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.