Zybo HDMI output help

[shurunxuan]

Hello everyone, I'm new to Zybo board and I have a question about it's HDMI port. Is Zybo's HDMI port capable of 3840x2160 video signal output at either 30fps or 60fps? If so, how should I modify the HDMI TX demo?

I tried to add timing parameters for 3840x2160@30fps like this:

static const VideoMode VMODE_3840x2160a30 = {
	.label = "3840x2160@30Hz",
	.width = 3840,
	.height = 2160,
	.hps = 4016,
	.hpe = 4104,
	.hmax = 4400,
	.hpol = 1,
	.vps = 2168,
	.vpe = 2178,
	.vmax = 2250,
	.vpol = 1,
	.freq = 297
};

But I always get 240MHz pixel clock frequency when the program runs, which results in "no signal" on my monitor. I guess this requires a change in the block diagram, but I need help on it. Thanks!

[jpeyron]

Hi @shurunxuan,

My understanding is that in our HDMI projects we had to overclock the Zybo to get 1080p to work. With that being said I do not believe that you will be able to get 4K resolution using the Zybo. I will do more research next week about this issue and respond here.

cheers,

Jon

[shurunxuan]

Hello @jpeyron

Thanks for your quick response and explanation on the project. If this is the case, I think that getting 4K resolution maybe hopeless, but I'm looking forward to your result on this issue.

shu

[Kris Persyn]

On 9/23/2017 at 1:09 AM, jpeyron said:

will do more research next week about this issue and respond here.

Any updates on this? (@jpeyron)

Kg, Kris

[jpeyron]

Hi @Kris Persyn,

Its my understanding that the hardware on the Zybo boards are not able to support 4k resolution.

thank you,

Jon