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TSS3's avatar
TSS3
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2 years ago

HDMI ports issues

Hi,

In UG-HDMI 2016.05.02 (AS WELL AS LATER REVISIONS!), section "Source Interfaces",

following ports are not properly explained:

1) mode (0=DVI, 1=HDMI).

What's the difference between these two mode settings, how does the setting affect

the IP operation, and when is this setting critical?

2) ctrl[6*N-1:0].

Because always with Arria10 N=2, (2 symbols per clock), it's 6 control bits per pixel.

However, it is unclear how 6 bits map into only 4 bits (= 2bits x 2 colors (Green, Red) ),

whether 2bits are ignored and which bits of the six are they

(since Blue already carries the HSYNC and VSYNC it doesn't need control bits),

which bit is C0 or C1 and of what color, and whether the IP will operate just fine

if all these 12bits are simply 0...000 ?

Thanks.

Video

4 Replies

  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Itay Sidar,

    Thank you for reaching out.

    Just to let you know that Intel has received your support request and currently we are confirming the details with our internal team.

    I shall come back to you with findings.

    Thank you for your patience.

    Best Regards,

    ZH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Itay Sidar,

    Apologize for the delayed response as we encounter some difficulty.

    Regarding to your question 1), yes, there are 2 modes available. Both modes have their own set of parameter and algorithm that works differently, for DVI, it only transmit video, while for HDMI, it handles both video and sound.

    This selection of input source will depend on customer's application, if your input source only require video, then DVI would be the setting that need to be set, if you require both video and sound, then HDMI would be the right setting.

    The mode here is for different input source to HDMI sink core; 0--DVI; 1---HDMI.

    The ctrl is for DVI input mode, if you wish to use HDMI input mode, you need to set to 6'd0.

    Referring to question 2), there are 6 bits, 4 bits are used for hsync and vsync, and the remaining is unused so we set it as reserved.

    You may refer to the HDMI specification documentation under Chapter 5- Signaling and Encoding for more detail information.

    Hope this answers your question.

    Thank you.

    Best Regards,

    ZH_Intel

  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Itay Sidar,


    Good day.

    Hope my previous reply answers your question.

    Do you still have further inquiries on this issue?

    If there is no further inquiries, I will transition this thread to community support.

    Thank you.

    Best Regards,

    ZH_Intel



  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Itay Sidar,


    Good day.

    We do not receive any response from you to the previous reply that I have provided. Hope my previous reply answers your question.

    Since there is no further inquiries, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread.


    Stay safe, and I hope you have a great day.

    Thank you.

    Best Regards,

    ZH_Intel