vesafb

vesafb

[Nathan King]

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Hey folks,

I'm trying to get a feel for how all this works as I get ready to really
start monkeying with the driver, so I liberally sprinkled some printk's
around vesafb.c and cfb_fillrect.c and recompiled. However I only ever get
messages from three of the vesafb.c functions, all on bootup, and none from
cfb_fillrect.c. I know doing all those messages will slow down my system(or
they would if they worked right) but I'm just trying to figure out what
files control what.

So my question is, which files are responsible for all these constant
fillrect and bitblt operations, and can they monkeyed with to generate
kernel or other messages?

Using 2.6.16 with fedora core 5 and the VESA driver.

Many thanks,
Nathan

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Re: vesafb

[Antonino A. Daplas]

Nathan King wrote:
> Hey folks,
> 
> I'm trying to get a feel for how all this works as I get ready to really
> start monkeying with the driver, so I liberally sprinkled some printk's
> around vesafb.c and cfb_fillrect.c and recompiled. However I only ever
> get messages from three of the vesafb.c functions, all on bootup, and
> none from cfb_fillrect.c. I know doing all those messages will slow down
> my system(or they would if they worked right) but I'm just trying to
> figure out what files control what.
> 
> So my question is, which files are responsible for all these constant
> fillrect and bitblt operations, and can they monkeyed with to generate
> kernel or other messages?

fillrect is called by ops->fill and ops->clear_margins.  The first one
should be called when scrolling the screen, while the second will be
called if xres is not divisible by the fontwidth or yres is not divisible
by the fontheight.

Tony