Re: monitor detection through ddc/edid stuff.

["Antonino A. Daplas" <adaplas@hotpop.com>]

On Sunday 12 September 2004 18:04, Sven Luther wrote:
> On Sun, Sep 12, 2004 at 05:32:44PM +0800, Antonino A. Daplas wrote:
> > On Sunday 12 September 2004 16:42, Sven Luther wrote:
> > > Now, another question which has me baffled. In set_par, i set the video
> > > mode for the card, but i only seem to have access to the bpp, and not
> > > the actual depth. Since i can distinguish between depth 15 (5551) and
> > > 16 (5650), as well as between depth 24 (8888) and 30 (AAA2), where do i
> > > get the information concerning the actual depth used from ?
> >
> > var->green.length
>
> So, on a 5551 more, i should get :
>
>   var->green.length + var->red.length + var->blue.length == 15
>
> right ?

Yes, sorry for being cryptic.  Only if (visual == truecolor ||
visual == directcolor), otherwise color depth = var->green.length.  If you
are using at least a 2.6.8 kernel, there is a new helper in
drivers/video/fbmem.c that you can check out:

int fb_get_color_depth(struct fb_info *)

Tony




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