DP159 Resolution

Hi Shu-Cheng,

DP159 is just a redriver/retimer it can't change the resolution.

However in HDMI 2.0 the bits per clock increases from 10 to 40, if you see the same video with lower resolution you have to check your video source.

If you see a different video from the one you are sending this could be the problem, perhaps DP159 is not configuring correctly, how are you connecting DDC?

Could you check TMDS_CLOCK_RATIO_STATUS = 1?

Regards

Garcia,

We have asked them to modify DP159RGZEVM as attached file.

Now they can work at 4k2k 30Hz, but customer's current solution can work at 4k2k 60Hz.

I am confirming TMDS_CLOCK_RATIO_STATUS = 1? with them, meanwhile could you provide any idea that might cause 30Hz frame rate??

SN75DP159 application circuit.pdf

Marco

Hi Marco,

Is good to know 4k2k@30Hz is working.

I have a couple questions for you, is your DP++ source capable to send HDMI2.0 data?
Standard DP++ sources support HDMI1.4b which only allows 4k2k@30hz

Regards

Gracia,

Yes, customer's data source can support HDMI2.0.

their system can work with competitor solution @ 4k2k 60Hz.

I want to try TMDS_CLOCK_RATIO_STATUS = 1, is this setting need Eyescan??

If yes, please provide Eyescan GUI and user manual to me.

thanks~

Marco

Hi Marco,

I'm sending EyeScan tool by email.
Are you configuring DP159 by I2C or GPIO?
Could you share the configuration you have on EVM's jumpers?

Regards

Garcia,

thanks~ I just follow default setting and modify as attachment show on DP159 EVM.

I can check detail EVM setting with customer tomorrow.

Marco

7380.SN75DP159 application circuit.pdf