[directfb-dev] Re: Video overlay questions

[Michel Dänzer <michel@daenzer.net>]

On Tue, 2003-09-02 at 22:09, Andreas Robinson wrote:
> Ville Syrjälä wrote:
> > So you're doing a gfxdriver which claims to work on vesafb?
> > You really need to add some specific card identification code
> > to the gfxdriver so that the driver won't be enabled for all
> > people using vesafb...
> 
> Already done. I have a kernel module which only stays put if a CLE266
> graphics device is present. The module uses devfs, so the DFB driver can
> probe for the module with stat(), like this:
> 
> static int driver_probe(GraphicsDevice *device)
> {
>     struct stat s;
>     return stat("/dev/cle266vgaio", &s) + 1;
> }
> 
> In other words, if there is no module installed, /dev/cle266vgaio won't
> exist, and driver_probe() will return zero.

/dev/cle266vgaio can very well exist without the kernel module, in
particular if /dev isn't mounted as devfs. If you at least opened it and
verified that it behaves as expected...


-- 
Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer



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