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KKomp's avatar
KKomp
Icon for New Contributor rankNew Contributor
7 years ago

Device tree board.xml file - VGA and AUDIO cores

Hello,

we have succesfully compiled Linux root, kernel, uboot and preloader (for our custom board) according to the instructions here:

https://rocketboards.org/foswiki/Documentation/EmbeddedLinuxBeginnerSGuide#

It works, but there is a question about preparing appropriate board.xml file for the device tree. We have configured it according to the instructions here:

https://rocketboards.org/foswiki/Documentation/DeviceTreeGenerator140

but we can't find information about defining the XML description for the VGA and AUDIO IP cores from the Intel library. This generates following sopc2dts errors:

Component audio_0 of class altera_up_avalon_audio is unknown

Component pll_video of class altera_pll is unknown

Component video_pixel_buffer_dma_0 of class altera_up_avalon_video_pixel_buffer_dma is unknown

Component video_rgb_resampler_0 of class altera_up_avalon_video_rgb_resampler is unknown

Component video_vga_controller_0 of class altera_up_avalon_video_vga_controller is unknown

How to define these components in the board.xml?

Are there any examples how to use these components in the Linux?

Regards

K

4 Replies

  • Ahmed_H_Intel1's avatar
    Ahmed_H_Intel1
    Icon for Frequent Contributor rankFrequent Contributor
    7 years ago

    I see this error has been resolved before. This doesn't require workaround necessarily. You can safely disregard the warning messages and proceed to compile your device tree sources normally.

    See this KDB:

    *******************

    Spurious Error Messages from sopc2dts

    Description

    When you are generating the device-tree source file (.dts) for an SoC HPS hardware design, you might see a large number of spurious error messages. The following list shows some of messages produced by sopc2dts:

    sopc2dts --input soc_system.sopcinfo --output soc_system.dts --board

    soc_system_board_info.xml

    Failed to find h2f_lw_reset

    Failed to find f2h_reset

    Component hps_0 of class altera_hps is unknown

    Component hps_0_fpga_interfaces of class altera_interface_generator is unknown

    Component hps_0_hps_io of class altera_hps_io is unknown

    Component hps_0_clk_0 of class hps_clk_src is unknown

    Component hps_0 of class altera_hps is unknown

    Component hps_0_fpga_interfaces of class altera_interface_generator is unknown

    .

    .

    .

    DTAppend: Unable to find parent for compatible. Adding to root

    DTAppend: Unable to find parent for leds. Adding to root

    DTAppend: Unable to find parent for pmu0. Adding to root

    Workaround/Fix

    No workaround is necessary. You can safely disregard the warning messages and proceed to compile your device tree sources normally.

    ***********************

    https://www.intel.com/content/altera-www/global/en_us/index/support/support-resources/knowledge-base/solutions/fb127751.html

    Please let me know if this answers your question.

    Regards.

  • Nooraini_Y_Intel's avatar
    Nooraini_Y_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    7 years ago

    Hi,

    Currently I am reviewing the forum for any open questions and found this thread. I apologize that no one seems to answer this question that you posted. Since it has been a while you posted this question, I'm wondering if you have found the answer? If not, please let me know, I will try to assign/find someone to assist you. Thank you.

    Regards,

    Nooraini

  • Ahmed_H_Intel1's avatar
    Ahmed_H_Intel1
    Icon for Frequent Contributor rankFrequent Contributor
    7 years ago

    Hi K,

    I am working on this now, It is a very deep question which requires time to find the accurate answer.

    Regards.

  • KKomp's avatar
    KKomp
    Icon for New Contributor rankNew Contributor
    7 years ago

    Thank you for the answer. At the moment we did some other work on this board and left VGA/AUDIO subject open for a while. If there will be no examples, etc., we will just connect the Linux framebuffer to a custom core, as other custom functions. But this will take some time, so if you can assist us with some examples it would be helpful.

    Regards,

    K