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Posts: 3 | Thanked: 6 times | Joined on Mar 2010 @ Shanghai
#325
Originally Posted by dj_steve View Post
ok, has anyone got any ideas how to RESTRICT the omapfb driver to a res of 320x240 at 12bpp ? as i suspect i have found the problem with the pageflipping woes partially.

i think they are trying to partially use the 5MBit of sram on the n8x0 which is roughly enough to handle 800x480 @ 12bpp but not enough to do double that (as the pageflipping requires) so im looking for how to restrict the framebuffer to a smaller display size and to let the lcd controller zoom it to full screen... any ideas ?
When I test my Gumstix Overo platform, there is a bootargs option which set omapfb.mode to dvi:${dvimode} where dvimode is something like 1024x768MR-16@60. I used a monitor to be the display, I ever changed it to 640x480MR-16@60 and it works for me. So I guess there is a similar configuration for you LCD like 320x240MR-12@60. You can refer to /drivers/video/modedb.c to learn the meaning of the format 1024x768MR-16@60.

Hope it helps.

Best regards,
Ming
 

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