Hi, This's regarding why we need to explicitly mention fb0 size in bootargs
By default, kernel allocates memory for fb as below 864 X 480 X 4 (width X height X bpp) When the application needs more memory, it can be sent through bootargs. 0:4 M allocate 4MB memory to fb. To suffice eclair requirement, we allocate 4MB for fb0. if not, we'll run into issues you faced. reagards, Deva On Feb 18, 7:35 pm, Deva R <[email protected]> wrote: > great that its resolved.. > > > omapfb.vram="0:4M" > > btw, its just single fb., and right now not sure why its mandatory to > explicitly quote 4M size. > will post, once i get update on it.. > > On Thu, Feb 18, 2010 at 5:37 PM, eternity <[email protected]> wrote: > > So finally I found as posted by Deva R > > > my bootargs was missing <omapfb.vram="0:4M"> which is mandatory for > > eclair. > > > according to > >http://wiki.davincidsp.com/index.php/Dual_Frame_Buffer_on_OMAP35x > > omapfb.vram allocate buffer for /dev/fb1. > > > But I saw in kernel .config, CONFIG_FB_OMAP2_NUM_FBS=1 only, even to > > make sure after android boots up I checked there is only one frame > > buffer in sysfs (/dev/graphics/fb0) > > > so, why that parameter is required??? > > any guess?? > > > On Feb 17, 3:27 pm, Tirtha Kanti Ghosh <[email protected]> wrote: > > > >Also, i used below bootargs. > > > >set bootargs 'console=ttyS3,115200n8 root=/dev/mmcblk0p2 rw rootdelay=1 > > > > mem=256M init=/init stdin=serial >stdout=serial stderr=serial > > > omap_vout.vid1_static_vrfb_alloc=y omapfb.vram="0:4M" ' > > > > >set bootcmd 'mmcinit;fatload mmc 0 0x80300000 uImage;bootm 0x80300000' > > > > I am using almost same bootargs but my memory address is 0x81c00000 as > > > mentioned inhttp://omappedia.org/wiki/Android_Getting_Started. > > > > >btw - regarding no UI coming up, i booted the same tree y'day and was > > ok.. > > > > do u mean, keep trying until it boots up??? > > > > >attached my boot log till UI. check against yours. > > > > thanks a lot. > > > > regards, > > > -- > > unsubscribe: > > [email protected]<android-porting%[email protected]> > > website:http://groups.google.com/group/android-porting > > -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
