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Visitor
Visitor
4,464 Views
Registered: ‎02-10-2010

logiccore ip displayport bug.

I use xilinx ISE14.4  core ip V3.2 REV8  and windows7 condition.

using the displayport UHD(3840X2160) module normal operate 4 LANE 5.4Ghz.

but frontporch value less then 20 problem occured.

timing is below.

DotClock:533.28Mhz

H total : 4000        V total :2222

H display:3840       V display :2160

H back porch :112  V back porch :3

H sync width : 32   V sync width :5

H front porch :16   V front porch : 54

H frequency : 133.32 Khz  V frequency : 60 hz

KakaoTalk_20160901_105001099.jpg

 

KakaoTalk_20160901_105002184.jpg

but the h front porch more then 20 is no problem.

KakaoTalk_20160901_105003841.jpg

KakaoTalk_20160901_105004837.jpg

is there a person who has this experience? 

but time is not problem because is time not problem because chked by oscilloscope.

how to solve ?? T T

please answer the replay any idea.

dgshin@e-uplus.co.kr

 

dgshin
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3 Replies
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Teacher
Teacher
4,453 Views
Registered: ‎06-16-2013

Hi jesushand

 

I have some questions to resolve this issue.

Could you tell me them ?

 

Q1) What device or LCD monitor do you use ?

Q2) Does LCD device or LCD monitor have some tolerant for UHD(3840x2160) ?

Q3) How do you calculate video timing ?

Q4) What mode do you use ? (8bit RGB or 8bit YUV444 or 8bit YUV422 or other) ?

Q5) Which IP do you debug ? DP IP Rx or DP IP Tx ?

If you debug DP IP Tx, I guess it's back end device issue. (LCD device or LCD monitor)

You should contact LCD device vendor or LCD monitor vendor, if possible.

 

Thank you.

Best regards,

 

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Visitor
Visitor
4,104 Views
Registered: ‎02-10-2010

Q1) What device or LCD monitor do you use ?

  -->kintex7 -2 (XC7K160T)

Q2) Does LCD device or LCD monitor have some tolerant for UHD(3840x2160)

   --> UHD 3840X2160

Q3) How do you calculate video timing ?

    --> i have work pattern generate equipment. (my job)

         so it is not problem another display operate. LVDS and VbyONE module nothing problem.

Q4) What mode do you use ? (8bit RGB or 8bit YUV444 or 8bit YUV422 or other)

     -->8BIT  RGB

Q5) Which IP do you debug ? DP IP Rx or DP IP Tx

    -->  DP IP TX

If you debug DP IP Tx, I guess it's back end device issue. (LCD device or LCD monitor)

You should contact LCD device vendor or LCD monitor vendor, if possible.

   I HAVE WORK FOR LG AND 3kind moudule  same.

  and LG DEVELOPE WORK NOTEHING module problem. PC BASE GRAPHIC CARD . nothing problem.

 

 

dgshin
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Highlighted
Visitor
Visitor
4,099 Views
Registered: ‎02-10-2010

Q1) What device or LCD monitor do you use ?

    ->kintex7 -2 (XC7K160T) it is LCD test pattern generate use.

     --> this equipment many kind displayport LCD module test machine.

          LCD monitor test LG, BOE, and another made test same.

     

dgshin
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