Menu
▾
▴
Re: [Gumstix-users] pxa2xx-fb: probe of pxa2xx-fb failed with error -12 (bug in gumstix.c?)
|
From: Nava W. <nwh...@tc...> - 2007-03-08 23:47:58
|
Many thanks, I had the kernel option selected but it wasn't compiling in correctly (as far as I could see). It looks like (unless I'm mistaken) there is a typo in gumstix.c where you have: #ifdef CONFIG_FB_PXA_ALPS_CDOLLAR and #ifdef CONFIG_FB_ALPS_CDOLLAR I've changed it so they are both CONFIG_FB_PXA_ALPS_CDOLLAR and it seem to be happy now (no more -12 and my display works) Thanks for your help. On Thu, 8 Mar 2007, Chris Dollar wrote: > Those #ifdefs are for my Alps lcd. Basically the pxafb driver got a > change in 2.6.19 that require you to call set_pxa_fb_info() to init > the framebuffer with some values (what you are used to setting in your > bootargs). Here is where the driver change was discussed in the arm > kernel mailing list > http://marc2.theaimsgroup.com/?t=115101413400004&r=1&w=2 > > To get it working, in the kernel config select the option to 'Use > definitions for Chris Dollar's ALPS screen' - this will get that call > being made to set_pxa_fb_info(). Then if you also select to use the > command line params and use that in your bootargs it will override the > Alps settings and use whats in your bootargs. > > Then if you can you should have a look at that section in gumstix.c > and create one for your display so Craig can fold it into the kernel > patches and add it to the kernel config. You don't really have to do > this since your bootargs can override the Alps settings, but its > probably a good idea just in case the arm kernel folks want to remove > the option for the command line parameters sometime in the future. > > Chris > > On 3/7/07, Julien Lebot <les...@ho...> wrote: > > Hello, > > > > The problem is that the framebuffer need to be initialized in gumstix.c, a > > mailing list member proposed a patch for the gumstix.c (joined). > > I think it should be compiled in the kernel so it can allocate some memory > > at boot, thus improving memory management. I've never tried as a module, but > > there is also this cool feature of having your display up at boot :) > > > > Julien > > > > >Hi, > > > > > >I'm trying to get pxafb working with the latest buildroot (1327) however I > > >keep getting the error: > > > > > >pxa2xx-fb: probe of pxa2xx-fb failed with error -12 > > > > > >This is when both compiled in to the kernel and as a module (I understand > > >it needs to be compiled in now is that correct?). I'm using the same > > >options as on another gumstix (I think the kernel was around 2.6.11 > > >perhaps). I've also tried with just video=pxafb:mode:640x240-16,passive as > > >a kernel option, among others including the examples from: > > >http://docwiki.gumstix.org/Display > > > > > >Can anyone help? Or perhaps knows how I'd go about finding out what -12 > > >means? > > > > > >Many thanks! > > > > > > > > >-- > > > > > > > > > > > >------------------------------------------------------------------------- > > >Take Surveys. Earn Cash. Influence the Future of IT > > >Join SourceForge.net's Techsay panel and you'll get the chance to share > > >your > > >opinions on IT & business topics through brief surveys-and earn cash > > >http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > >_______________________________________________ > > >gumstix-users mailing list > > >gum...@li... > > >https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > _________________________________________________________________ > > MSN Hotmail : créez votre adresse e-mail gratuite & à vie ! > > http://www.msn.fr/newhotmail/Default.asp?Ath=f > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share your > > opinions on IT & business topics through brief surveys-and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > -- |