On Thu, 2008-05-01 at 17:21 -0700, BJ Opp wrote: > Hi there. Did you ever resolve your frame buffer issues? I'm having > what seems to be a very similar problem working with the dm355 and a > 240x400 LCD. Looking at all the video lines on a scope shows that I'm > only getting about a 3rd of the data I'd expect per vsync. > > Specifically, I wrote a test program to create an rgb tes image where I > simply write bars along the screen. It displays the first 240 pixels > just fine, but if I try to display 2 full bars (480 pixels), the data > doesn't even clock out of the davinci. It's not until I write > 3 bars > (721 or more pixels) that I can see the 2nd bar on the display. I have > no idea why the davinvi is just eating that data and not outputting it. > > Any ideas are greatly appreciated. Thanks
It's not much of an idea, but: The fact it's vertical half screens sounds like something to do with interlaced/progressive buffer handling. The VPFE and VPBE can both be configured to deal with frame buffers either way, and I had a few entertaining days with vertically half-scaled video output etc. when the progressive/interlaced settings were out. I don't have experience with LCD output though. Good luck, -- Jon Povey, Design Engineer [EMAIL PROTECTED] | +44(0)1280 825983 Racelogic is a limited company registered in England. Registered number 2743719. Registered Office 5 Little Balmer, Buckingham Ind Pk, Buckingham MK18 1TF. The information contained in this electronic mail transmission is intended by Racelogic Ltd for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email so that the sender's address records can be corrected. The views expressed by the sender of this communication do not necessarily represent those of Racelogic Ltd. Please note that Racelogic reserves the right to monitor e-mail communications passing through its network _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
