For SD, we saw the problem went away after the patch. But for HD we still see the flickering by simply typing on the console, since it is very CPU demanding. DM355 may have some hardware constraints in displaying multiple windows in HD mode....
Owen ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, August 14, 2008 1:24 AM To: Chu, Owen; [email protected] Subject: AW: Framebuffer on dm355 How did you solve the Problem? Thanks, Tino. Mit freundlichen Grüßen i.A. Tino Hoffstädt Hardwareentwicklung / Hardware Development Tel.: +49 (0)30 769929 - 0 Fax: +49 (0)30 769929 - 12 [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]> GSP Sprachtechnologie Gesellschaft für elektronische Sprachsysteme mbH Teltowkanalstr. 1 D-12247 Berlin www.gsp-berlin.de<http://www.gsp-berlin.de/> Registergericht: Amtsgericht Berlin Charlottenburg, HRB-Nr.: 22455 Geschäftsführer: Dr. Helmut Loebner -----Ursprüngliche Nachricht----- Von: Chu, Owen [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 13. August 2008 21:14 An: Hoffstädt, Tino; [EMAIL PROTECTED]; [email protected] Betreff: RE: Framebuffer on dm355 We saw the flickering problem in SD as well as HD mode. The problem is due to insufficient CPU bandwidth was allocated to display the image. Running the patch means you increase the bandwidth allocation, which may resolve the problem in SD mode but that may not be enough for HD. Thanks Owen ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 13, 2008 1:22 AM To: Chu, Owen; [EMAIL PROTECTED]; [email protected] Subject: RE: Framebuffer on dm355 Hi, I'm working with the DM355-EVM and I connected an 1024x768 LCD-Panel to it. Since I changed the resolution in the dm355-framebuffer driver from PAL to 1024x768, I have a lot of flicker on the screen. It's getting better when I disable the OSD1, VID0 and VID1 Framebuffer - but when I work with the board (cause some ethernet traffic or something else), it is flickering again. I also tried the 'writeb 20000020 0 10' patch, but the flicker ain't away. You wrote, you can use the DM355 with a 1680x1023 (or like Owen: 1920x1080) resolution. Did you have the same problem like me before? Best Regards, Tino. --- [Hoffstädt, Tino] -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Auftrag von Chu, Owen Gesendet: Dienstag, 12. August 2008 22:53 An: yhlshareware; [email protected] Betreff: RE: Framebuffer on dm355 Hi, We were able to display 1920x1080 image on frame buffer device. There's no restriction on the image height in the driver as such, as long as you've reserved enough buffer. Owen ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of yhlshareware Sent: Monday, August 11, 2008 9:55 PM To: [email protected] Subject: Framebuffer on dm355 Hi All, Now I have added the support of 1680x1050 resolution on dm355, I have measured the signal (HSYNC,VSYNC etcs) using oscilloscope. But when I set the size of framebuffer using "fbset -fb /dev/fb/1 -xres 1680 -yres 1050 -vxres 1680 -vyres 2100 -depth 16",I can not get the right display for 1680x1050 resolution, It only displayed a small part about 27 lines. If I set the framebuffer as 1680x1023, It can work well. It seemed that the height of framebuffer can not be more than 1024. Please give me some help. Thanks. Best Regards Jeff
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