We are testing Nano HDMI 2.0 signals,and found both the Devkit board and our designed carrier board seem run INCORRECT frequency as 133MHz when HDMI output set 2160P/60Hz, at the same time the kernel message show display pix-clock is 533MHz, this phenomenon of out of sync doesn’t make sense.
For this reason , we could not go on HDMI testing, any suggesting about this problem?
Yes,we followed the NV test application note;for now ,we have tested HDMI 1.4 4K/30Hz. Our oscilloscope is N5399C which is applicable for HDMI 2.0 test.
Any suggestions about the Topic question?
We have tested 2160P/1080P/720P/480P (HDMI1.4) successfully, only the HDMI2.0 2160P/60Hz failed to test.
Yes, the 133MHz is measured on scope while the kernel message show 533MHz.
1, Yeah, we know Nano hardware capability can display real 4K@60, but now it seems Nano hardware not capable for 4K@60 for what we have measured HDMI 2.0 SI by scope,we want to know how Nano 4K@60 worked. By the way, our customized carrier board have only one display port–HDMI.
2,Yes, 4K@60 depends on the monitor.
You can refer below picture for pclk 533MHz, is 533MHz abnormal?
All logs you need have sent to you.
As you said the software may not definitely support HDMI 2.0, in another word, the Nano couldn’t support EXACT HDMI 2.0 3840x2160@60Hz, is it right?
So, we could not go on our HDMI SI test, Could you please give some other suggestions about 3840x2160@60Hz test?