Re: gen_set_var() fix?

Re: gen_set_var() fix?

[Antonino Daplas]

On Wed, 2002-08-28 at 18:00, Jani Monoses wrote:
> James
> Should't gen_set_var set the var in info here as well? (when no check_var present)
> BTW is gen_set_var going to stay in the new API or go away ?
> 
> --- fbgen.c.orig       Wed Aug 28 09:49:45 2002
> +++ fbgen.c     Wed Aug 28 09:57:32 2002
> @@ -36,7 +36,7 @@
> 
>         if (con < 0 || (memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))) {
>                 if (!info->fbops->fb_check_var) {
> -                       *var = info->var;
> +                       info->var = *var;
>                         return 0;
>                 }
> 
> 
The original code is correct.  It means the driver supports only 1 video
mode, which is the current one in info->var.  

Tony




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Re: gen_set_var() fix?

[Geert Uytterhoeven]

On Wed, 28 Aug 2002, Jani Monoses wrote:
> so not having check_var implies we only support one video mode?

Yes. This is useful for e.g. handheld devices with LCDs, and for offb.

> > The original code is correct.  It means the driver supports only 1 video
> > mode, which is the current one in info->var.  

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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							    -- Linus Torvalds



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gen_set_var() fix?

[Jani Monoses]

James
Should't gen_set_var set the var in info here as well? (when no check_var present)
BTW is gen_set_var going to stay in the new API or go away ?

--- fbgen.c.orig       Wed Aug 28 09:49:45 2002
+++ fbgen.c     Wed Aug 28 09:57:32 2002
@@ -36,7 +36,7 @@

        if (con < 0 || (memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))) {
                if (!info->fbops->fb_check_var) {
-                       *var = info->var;
+                       info->var = *var;
                        return 0;
                }


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Re: gen_set_var() fix?

[Jani Monoses]

Thanks
so not having check_var implies we only support one video mode?

> > 
> > 
> The original code is correct.  It means the driver supports only 1 video
> mode, which is the current one in info->var.  
> 
> Tony
> 
> 
> 
> 
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Re: gen_set_var() fix?

[James Simmons]

> James
> Should't gen_set_var set the var in info here as well? (when no check_var present)

No. The first test is to see if the passed in var is equal to the current
var in info. Note info->var is always set before we call gen_set_var. The
next set is check if xxfb_check_var is there. If this function is lacking
then we know the hardware supports a static mode. Then it just returns the
defualt var which is set before we call gen_set_var.

> BTW is gen_set_var going to stay in the new API or go away ?

It is to stay. It will be intergrated into fbmem.c once we are done.

> --- fbgen.c.orig       Wed Aug 28 09:49:45 2002
> +++ fbgen.c     Wed Aug 28 09:57:32 2002
> @@ -36,7 +36,7 @@
>
>         if (con < 0 || (memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))) {
>                 if (!info->fbops->fb_check_var) {
> -                       *var = info->var;
> +                       info->var = *var;
>                         return 0;
>                 }



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James Simmons  [jsimmons@users.sf.net] 	                ____/|
fbdev/console/gfx developer                             \ o.O|
http://www.linux-fbdev.org                               =(_)=
http://linuxgfx.sourceforge.net                            U
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