On Thu, 2004-04-22 at 02:13, James Simmons wrote:

quoted

quoted

quoted

This is true for PCI/AGP, but may not be true for unified memory systems.

Right, but that confirms my opinion that the choice of the technique used
shall be under control of the driver

Agreed. So a hint would be the most appropriate.

Hi Antonino. Haven't heard from you in a while.

Yeah, been busy.

I agree. What if we add to vmode in struct fb_screeninfo.
We have 

FB_VMODE_YWRAP		256
FB_VMODE_SMOOTH_XPAN	512

We can add more fields. Of course we have to figure out what the common 
case would be.

We can add:

FB_VMODE_YPAN
FB_VMODE_REDRAW /* will use imageblit */
FB_VMODE_MOVE   /* will use copyarea */

Personally, I think FB_VMODE_REDRAW should be the default as it is 
faster than FB_VMODE_MOVE for most PCI cards.

Just to be clear.

1.  If without a ypan or ywrap, fbcon can either do a redraw or a move

2.  If with ypan or ywrap, then fbcon can only do a move.

Ypan + redraw (FB_VMODE_MOVE | FB_VMODE_REDRAW) is not supported, and I
consider this combination to give the fastest and smoothest scrolling
action if driver does not have any hardware acceleration in most cards.
Perhaps this can be added?

Tony
 






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