Re: Question about cfb_copyarea

On Thursday 22 February 2007 11:45, Antonino A. Daplas wrote:
> > > The global 'logo_shown' is only used at the very start, to display the
> > > boot logo if it is equal to LOGO_DRAW. It basically forces the scroll
> > > mode to redraw and gives space in the upper part of your screen. After
> > > that 'logo_shown' is assigned the index of the foreground console
> > > (usually 0) and your scroll settings are now used.
> >
> > No, 0 is a valid index and always used in console 0. So my scroll
> > settings in console 0 are never used.
>
> No, scroll_redraw is used if logo_shown = LOGO_DRAW.  After a switch, it
> changes to logo_shown = fg_console = 0,  and this time your scroll
> settings will be used.

So logo_shown will be set always to 0 for console 0, even if the logo is 
disabled? What do you mean with "switch"? Switch to another console? Or 
something else?

Maybe I missunderstand. In fbcon_scroll() I found:
[...]
	if (logo_shown >= 0)
		goto redraw_up;
[...]
But FBCON_LOGO_* are defined to values below 0. And with logo_shown=0 always 
the mode SCROLL_REDRAW is used. I'm confused.

> > > As to why your driver freezes, I don't know.  Check if it also crashes
> > > with cfbcopyarea first.
> >
> > I tried it with cfbcopyarea, because my hardware routine isn't finished
> > yet. But all I tried, cfbcopyarea will never be called. It always ends up
> > in ops->bmove() and crashes...
>
> ops->bmove is basically a wrapper to copyarea, so it does get used. I
> don't know why it would freeze though.  Perhaps you can pinpoint where
> exactly in bmove it crashes.

I will try it.

Juergen

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