Re: [Linux-fbdev-devel] Re: board with broken vga ...

[Petr V. <VAN...@vc...>]

On 22 Jul 02 at 22:40, Sven wrote:
> 
> What would solve my problem in the easiest way would be to have some 
> framebuffer restore hook or something in the fbdev driver, which would get called
> in take_over_screen or something such, after the screen has been resized ?

Just put it into vc_screenbuf after register_framebuffer() returns, and
force redraw...
 
> Or Maybe simply tell vc_resize that we use a special way of reading the framebuffer.
> 
> Or i should implement the trick you use for setting the card in 
> graphic mode later on in the setvar stuff ?

If you'll override save_screen, and you'll put set_origin() into visual_init,
I believe that it will work:

(1) in take_over_console, copy data to screenbuf using your own save_screen.
(2) now vc_resize (with prior set_origin) will copy data from old screenbuf
    to reallocated screenbuf (instead of from videoram to reallocated
    screenbuf).
(3) and update_screen() will just paint data which are already on screen
    if resolution changed. If resolutions matched, it will put data on the
    screen.

                                                    Petr