Re: [Linux-fbdev-devel] [BK fbdev updates]

[Antonino Daplas <adaplas@pol.net>]

On Fri, 2002-11-01 at 05:03, James Simmons wrote:
> 
> Sorry about not producing a regular diff. The final changes really did a
> number on the framebuffer console code in fbcon.c so I had some massive
> work to do. I still have a massive amount of cleaning up to do. Also a lot
> of drivers stil haven't been ported.
> 
> So here is the regular diff against 2.5.45
> 
> http://phoenix.infradead.org/~jsimmons/fbdev.diff.gz
> 

James,

I tried the patch, and it does produce a cleaner and smaller driver. 
Overall, I like it. Some observations:

1. Without the fb_set_var() hook, switching from X messes up the
console.  I would guess this will be addressed by the console?

2. Console panning/wrapping does not work.  updatevar includes a check
"if (con == info->currcon)", and my guess is info->currcon is obsoleted
so the check always fails.

3. fbdev can be loaded without taking over the console.  After running
an fb-based application, exiting fbdev messes up the vga console
(actually hangs the system).  Should the fbdev driver provide the
capability to restore the VGA state then, ie at info->fb_release?

4. The initial font loaded is 8x8. It seems that 8x16 fonts are limited
for the SGI console console only.  Any reason why?

5.  The cfb_* drawing functions still behave erratically, especially in
emacs.  Geert has made some versions that work correctly for me.  This
was discussed in a thread sometimes ago.

Some of the above problems may be from the driver side (ie. #3).

Tony

Attached is a diff that will allow the logo to be drawn at 8-bpp
pseudocolor:

diff -Naur linux-2.4.45-fbdev/drivers/video/console/fbcon.c linux/drivers/video/console/fbcon.c
--- linux-2.4.45-fbdev/drivers/video/console/fbcon.c	Fri Nov  1 19:19:13 2002
+++ linux/drivers/video/console/fbcon.c	Fri Nov  1 19:20:00 2002
@@ -2281,12 +2281,12 @@
 		}
 		saved_palette = info->pseudo_palette;
 		info->pseudo_palette = palette;
-		image.width = LOGO_W;
-		image.height = LOGO_H;
-		image.depth = depth;
-		image.data = logo;
-		image.dy = 0;
 	}
+	image.width = LOGO_W;
+	image.height = LOGO_H;
+	image.depth = depth;
+	image.data = logo;
+	image.dy = 0;
 #endif
  
     for (x = 0; x < num_online_cpus() * (LOGO_W + 8) &&