I am using a custom OS and have tailored the display driver and timing after the standard Linux distribution. I have several Rev A6 and a few REV B boards which the display driver works just fine on several different resolutions. I noticed when I run the exact same software (card based image) on a rev C board my display monitor will not sync. I have verified the no sync with two different rev C boards (CircuitCo and Element14). This leads me to believe there is some subtle hardware difference. I verified the pclk/hsync/vsyn/de timings are exactly the same on the scope for all the rev A6 the B and the C boards. So I assume everything up to the framer is exactly the same.
All the factory Linux versions work just fine but I did notice on the latest rev C boards with the Debian distro they are running at a much faster pclock rate 111Mhz vs 40Mhz. Was the framer or some clocking changed? Any idea on what could explain why rev A and B boards works but C’s do not even though the LCD controllers timing are exactly the same? -- 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]. For more options, visit https://groups.google.com/d/optout.
