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Visitor
Visitor
709 Views
Registered: ‎01-08-2019

How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

I used K7325T FFG900 -2 to receive HDMI signal from my computer.In my computer setting,I can find that my board can be set as 1080p60hz,2160p30hz and 2160p60hz. I can receive 2160p30hz and 1080p60hz correctly except 2160p60hz. My fpga project originates from KC705 HDMI RX SUBSYSTEM example.I only change a little parameter cfg in phy controller and HDMI RX IP,only change ppc(pixels per clock) from 2 to 4 because Xilinx recommends using 4-wires to express 2160p60hz image. I was puzzled by this question for a long time.How should I do next step?Please give some means to me.Thank you.
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Mentor
Mentor
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Registered: ‎06-16-2013

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hi @armboy 

 

Did you change EDID parameter on FPGA ?

If no, I strongly suggest you to set suitable EDID parameter in ex. EEP ROM or something.

 

Best regards,

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Xilinx Employee
Xilinx Employee
621 Views
Registered: ‎03-07-2018

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hello @armboy 

For 2160p60 YUV444/RGB video, only 8bits is supported as defined by HDMI 2.0 spec due to bandwidth limitation (PG236). Kindly check.

I believe you have connected 4k monitor. Please provide details of your HDMI monitor.

Possibly this issue could be related to Si5328. Kindly check https://forums.xilinx.com/t5/Video/HDMI-TX-SS-example/td-p/872298 This thread might provide you some help to resolve your issue.

 

 

 

Regards,
Bhushan

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Visitor
Visitor
578 Views
Registered: ‎01-08-2019

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hello  watari,

I am using my DELL monitor's EDID in my board,which can support 2160P 30HZ & 60HZ.In my rx board ,an I2C eeprom which contains the EDID is used for TX reading.My computer can access my board same as DELL monitor.

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Visitor
Visitor
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Registered: ‎01-08-2019

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hi bpatil,

Thank you for your kindly guide.

I really send 2160p60hz, RGB 8bit video to my DELL monitor and rx board via HDMI cable,and my rx board use the same EDID with DELL monitor.My computer can identfy their resolution correctly(regard both of them support 2160p 30 & 60HZ).

Here is my rx board log .Thank you.

微信图片_20190409101755.png

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Xilinx Employee
Xilinx Employee
510 Views
Registered: ‎03-07-2018

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hello @armboy 

I am glad your issue is resolved. 

Please close this thread by accepting solution to the post which helped you to resolve this issue.

This will help others to refer this thread if they are facing same issue.

Regards,
Bhushan

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Visitor
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Registered: ‎01-08-2019

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hello @bpatil ,

I am sorry to say that I can not get the right video data even though the log seems OK.

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Xilinx Employee
Xilinx Employee
478 Views
Registered: ‎03-07-2018

Re: How strange! I can't receive 2160p60hz HDMI signal via K7325T HDMI RX subsystem,while can analyze 1080p60hz correctly

Hello @armboy 

Did you try chaging your monitor with 4K monitor?

Please let me know your monitor details.

Regards,
Bhushan

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