Dear Jeroen, In message <50e55d24.8000...@myspectrum.nl> you wrote: > > So the intention was to fix that while preserving the frame buffer and I > don't want linux to steal so much memory. The minimum amount of > memory the dss accepts is 2MB though (for reason unknown to me). > Without the fb address set U-boot will allocate it at 1MB before the end > of the ram, since it does not have the 2MB minimum. With the fb address > set to -2MB u-boot will allocate itself over it, hence the patch, do > actually > reserve the frame buffer (well in the most simplistic way, by placing > everything before it). > > As Wolfgang suggested, maybe I shouldn't point at U-boot but blame > linux and get rid of the 2MB alignment. I haven't checked yet, but I > don't see why that should not work. So this is resolved for my > case (thanks for the suggestion) for now until I meet > > http://www.mail-archive.com/linux-omap@vger.kernel.org/msg80440.html
Hm... In any case the code should behave the same in U-Boot and Linux. If we can lift this restriction in Linux, then OK. If not, then the FB allocation in U-Boot (by lcd_setmem()) should result in the same size as allocated by Linux. After all, the allocated size should be a "resasonable" one ;-) > > + Define CONFIG_FB_ADDR if you want to use specific > > + address for frame buffer. This is typically the case > > + when using a graphics controller has separate video > > + memory. U-Boot will then reserve the frame buffer at > > + the given address instead of dynamically reserving it > > + in system RAM by calling lcd_setmem(), which grabs > > + the memory for the frame buffer depending on the > > + configured panel size. > > > > Please see board_init_f function. > > > Maybe it is clearer as "U-boot will then place the frame buffer at ... > instead of reserving" OK, will repost. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de 2000 pounds of chinese soup = 1 Won Ton _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
