Re: monitor detection through ddc/edid stuff.

On Sun, Sep 12, 2004 at 06:11:01PM +0800, Antonino A. Daplas wrote:

On Sunday 12 September 2004 18:04, Sven Luther wrote:

quoted

On Sun, Sep 12, 2004 at 05:32:44PM +0800, Antonino A. Daplas wrote:

quoted

On Sunday 12 September 2004 16:42, Sven Luther wrote:

quoted

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 *)

Ah, it seems this one didn't make it to 2.6.8, since i don't have such a
function. Will do : 

if (fix->visual == FB_VISUAL_TRUECOLOR || fix->visual == FB_VISUAL_DIRECTCOLOR)
	depth = var->green.length + var->red.length + var->blue.length;
else
	depth = var->green.length

instead. Hope this is ok.

Friendly,

Sven Luther


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