Re: porting fb driver to 2, 6(fb_get_fix, fb_get_var)

[syed khader <sk.syed@yahoo.com>]

--- "Antonino A. Daplas" <adaplas@gmail.com> wrote:

> syed khader wrote:
> > Hi,
> >   I am trying to port one of our LCD display frame
> > buffer driver to 2.6 kernel.
> >   The old 2.4 kernel had these functions defined
> in
> > fb_ops
> >     fb_open:    
> >     fb_release:
> 
> These 2 are still in 2.6, but they're optional.
> 
> >     fb_get_fix: 
> >     fb_get_var:     
> 
> Gone.
If they were gone do I have to just remove these
functions in the older version of the driver and
compile again. Will that suffice?
> 
> >     fb_set_var: 
> 
> The above is split into:
> 
> fb_check_var() - see if the requested var is
> compatible
>                  and if not, round up to the next
>                  legal value
> 
> fb_set_par()  - set the hardware based on the
> current
>                 var
> >     fb_get_cmap:
> 
> gone
> 
> >     fb_set_cmap:
> 
> replaced by fb_setcolreg()
> 
>  
> >     fb_ioctl:   
> 
> optional.
> 
> Additional required ops for 2.6.
> 
> fb_imageblit - expand monochrome to color and/or
>                expand 8-bit pseudocolor to color
> 
> Generic version for packed-pixel: cfb_imageblit
> 
> fb_fillrect - fill rectangular area with solid color
> 
> Generic version for packed-pixel: cfb_fillrect
> 
> 
> fb_copyarea - copy rectangular area
> 
> Generic version for packed-pixel: cfb_copyarea
> 
> 
> > 
> >   But the latest 2.6 fb_ops has removed these and
> > there is entirely new set of functions. 
> >   I tried to go to list archives but I could not
> find
> > information. 
> >   What functions in 2.6 fb_ops should to used to
> > implement this old 2.4 set of functions?
> 
> Look at skeletonfb.c for comments.  The simplest
> framebuffer driver you can start with is vfb.c
> 
> 
> Tony
> 
> 
  Another question: What happens to "struct display"
being used in the older version.

Regards
Syed

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