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Avnet Boards General Petalinux + Zedboard HDMI Output
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Forum Thread Details
  • State Not Answered
  • Replies 8 replies
  • Subscribers 354 subscribers
  • Views 2584 views
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  • zedboard
  • yocto
  • adv7511
  • hdmi
  • petalinux
Related

Petalinux + Zedboard HDMI Output

mmader87
mmader87 over 7 years ago

Hello,

 

I am fairly new to the Zedboard and just the Zynq chip in general.  I have followed several tutorials now to try to understand more about this board.

 

However, I am now stumbling on creating a Yocto image using the Xilinx and Petalinux layers.

 

I am following the the tutorial here (https://wiki.analog.com/resources/fpga/docs/build#folded_1 ) to generate the *.hdf file.

 

I then reference this *.hdf file in my Yocto load (I have attached my BBLAYERS and LOCAL.CONF files for reference).

 

I have then issued the command "bitbake virtual/kernel -c menuconfig" and enabled various things for the ADV7511 and Xilinx Framebuffer.

 

I then build my linux image using the command "bitbake petalinux-image-full" and everything builds successfully.

 

Note: I am using the "Rocko" branch of Yocto and all my layers are coming from Xilinx's github (https://github.com/Xilinx) - Build configuration also attached

 

However, I am having an issue with the HDMI:

1) No output is seen on the HDMI port

2) In the log, I see the following print:

 

Framebuffer /dev/fb0 not detected

Boot splashscreen disabled

 

Could someone explain to me the following:

1) Can I use the *.hdf file referenced above in my Yocto build to enable the HDMI?

2) Is there some additional kernel setup I am missing to enable the framebuffer and HDMI output?

 

Thank you for your help!

Attachments:
BuildConfiguration.txt.zip
local-conf.txt.zip
bblayers-conf.txt.zip
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  • bhfletcher
    0 bhfletcher over 7 years ago

    Matthew,

         Most of our staff are on vacation for the holidays. I will request one of them take a look when they return after the new year. In the meantime, perhaps one of these topics will be useful to you. The one references ZC702, which of course is not ZedBoard, but it does use the same Zynq-7000 family device.

     

    Bryan

     

    https://blog.mbedded.ninja/programming/embedded-linux/zynq/building-linux-for-the-zynq-zc702-eval-kit-using-yocto/

    https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842224/Getting+started+with+Yocto+Xilinx+layer

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  • kevinkeryk
    0 kevinkeryk over 7 years ago in reply to bhfletcher

    Hi Matthew,

     

    There are no good examples of doing what you are doing on PicoZed hardware, although it should be possible to achieve by porting one of the other examples to your PicoZed hardware.

     

    I am not as familiar with the Yocto flow but we frequently use the PetaLinux flow which is built on top of Yocto.  I am not sure how Yocto uses the .HDF to generate settings for FSBL and devicetree.

     

    Which HDL are you using in your design to attache the PS to the ADV7511 hardware?  If it is the HDL to AXI HDMI, make sure that you have the appropriate devicetree entries for framebuffer output:

     

    https://wiki.analog.com/resources/tools-software/linux-drivers/drm/hdl-axi-hdmi

     

    Best Regards,

     

    -Kevin

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  • mmader87
    0 mmader87 over 6 years ago in reply to bhfletcher

    Thank you Bryan,

     

    I have looked at the references you provided but I do not believe these answer my questions.

     

    Thank you,

    -Matthew

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  • mmader87
    0 mmader87 over 6 years ago in reply to kevinkeryk

    Thank you Kevin,

     

    I know you mentioned you're not familiar with Yocto, but how do you append the devicetree with the information you provided in the link?  I think that is the information I am missing.

     

    Thank you,

    -Matthew

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  • kevinkeryk
    0 kevinkeryk over 6 years ago in reply to mmader87

    Hi Matthew,

     

    Not sure how a pure Yocto build would work but PetaLinux uses a Yocto build recipe to build a devicetree with additional user input which comes from the system-user.dtsi file.  For more information on this, take a look at this page here:

     

    https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842482/Device+Tree+Tips

     

    Best Regards,

     

    -Kevin

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  • mmader87
    0 mmader87 over 6 years ago in reply to kevinkeryk

    Hi Kevin,

     

    A Yocto vs. PetaLinux build operate the same way.  I supplied the system-user.dtsi file with the appropriate device-tree entries (system-user.dtsi and device-tree.bbappend files are attached).  However, this did not solve my initial issue.

    Attachments:
    system-user.txt.zip
    device-tree.txt.zip
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  • mmader87
    0 mmader87 over 6 years ago in reply to bhfletcher

    Hi Byran,

     

    Has your people returned from their vacation yet? I would very much like to know their thoughts.

     

    Thank you

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  • dong0922
    0 dong0922 over 5 years ago

    Hi Matthew,

    Have you solved your problem?

     

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