Re: [Linux-fbdev-users] Question about cfb_copyarea

[Juergen B. <jue...@kr...>]

Hi Petr,

On Wednesday 31 January 2007 10:12, Petr Vandrovec wrote:
> Take a look at updatescrollmode() in fbcon.c - you must persuade this
> function to use SCROLL_*_MOVE, not SCROLL_*_REDRAW.  FBINFO_READS_FAST
> should be sufficient - or you can report fast bitblt + fast panning, or
> fast bitblt + slow imageblit.  If you report no panning + fast bitblt +
> fast imageblit, redraw is used :-(

I tried around to get fbcon to use SCROLL_MOVE. These are my current settings:

info->flags	= FBINFO_DEFAULT |
		  FBINFO_HWACCEL_COPYAREA |
		  FBINFO_HWACCEL_FILLRECT |
		  FBINFO_HWACCEL_IMAGEBLIT |
		  FBINFO_READS_FAST;
With this settings updatescrollmode() decides to use SCROLL_MOVE.

Two things are coming up with this scroll mode (all in fbcon_scroll() ):

 1) why is the variable "logo_shown" always set to 0 for console 0? When in
    console 0 it always ends up in "goto redraw_up;" But I have no logo on my
    console? For other consoles than 0 "logo_shown" is -1
    (=FBCON_LOGO_CANSHOW)
 2) with the settings above active on another console then 0, the whole system
    freezes immediately in ops->bmove() or ops->clear()????
 2a) when I comment out the "logo_shown" check in fbcon_scroll() it also
     freezes the whole system in console 0.

Any ideas?

Juergen