On Thu, Aug 23, 2018 at 4:38 PM <[email protected]> wrote: > > Hi, > > > I have a custom board based on beaglebone's design. I have HDMI output going > from TDA19988 directly to TS3DV642. TS3DV642 is being used as a switch > between two HDMI sources. One HDMI source is coming from TDA19988 and the > other source is coming from a laptop. I am able to switch between the > sources, and I can see the output from my laptop's HDMI on a monitor. I am > not getting HDMI output on a monitor from TDA19988 side. On my oscilloscope I > can see all the HDMI signals at the output of TDA19988, which are very > similar to the laptop's HDMI signals. > > > HDMI differential pairs coming from TDA19988 have 100ohm impedance. > > > I am not sure if its something in the linux image that I have to active or is > it something in the hardware that's causing this issue. > > Before this custom board, the design was tested on Beaglebone with > TS3DV642EVM and it worked fine. The only thing that changed in custom board > is I removed micro HDMI connector and routed HDMI differential pairs to > TS3DV642. > > > I would really appreciate any kind of help.
So how does "beagle clone" device read the end display's edid register in your design to know what resolution/etc to transmit? If the answer to that, is it doesn't... Then you need to force the hdmi output.. aka something similar to this, passed thru /proc/cmdline on bootup.. video=HDMI-A-1:1024x768@60e Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYhirS_YL3oN9cmTRP%3DaZHEfCWPdCOHKbTS7Zi6S3HyKdQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
