Re: Changing modes with fbset

[Otto Solares <solca@guug.org>]

On Tue, Jan 06, 2004 at 12:44:39PM +1100, Benjamin Herrenschmidt wrote:
> 
> > Ben, you that know the internals of fbdev's, it would be difficult to
> > implement the busid stuff?  Maybe that info is already known by the
> > drivers somewhere... It could even work for sparcs with sbus or others
> > archs with differents buses, as the busid nomenclature is very standarized
> > i think.
> 
> Fairly easy, though it would be even better to do it based on the
> sysfs stuff rather than an ioctl. 

Agree.  Problem is that sysfs stuff is very invasive i think and it
will be hard to push even on development trees like -mm ones.  An
ioctl could be something simple as passing a pointer to a buffer
of fixed length, the best imho would be extend fb_fix_screeninfo
struct to accomodate a 'char busid[16];' but that could break
binary compatibility.  If 2.6 break from 2.4 we could put it
there as anyway apps need to recompile.  Shame that there are
not sufficient 'reserved' bits.

-solca



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