[Linux-fbdev-users] RE: [Linux-fbdev-devel] "remap_page_range" i810 compile time problem ..

[Mukund JB. <muk...@es...>]

Hi adaplas,

Thankful to u for making things clear at every level.

> > But when I try this without accel=3D1 rotation fails. Can u just
narrate
> > me what is accel accentually doing?
>=20
> Because if accel is on, the driver is using it's own version of
drawing
> functions which are flexible enough that additional features can be
added,
> such as screen rotation.
>=20
> If accel is off, the driver will use the generic functions which
cannot do
> screen rotation.  Of course, one can write a software version that can
do
> screen rotation.

So, u mean the i810fb driver will process the command line parameters &
if finds the accel is "1" in the list, it will use its own functions or
else it will use the generic functions provided in the fbgen.c file.

This is my understanding about fb driver architecture

			Application
			-----------
		  XFree86 / Directfb (Embedded)
			-----------
			 FB driver
			-----------
			 HARDWARE

Are these files below a part of fb driver or do they come under a
different level in fb driver architecture?

fbcon.c - low level framebuffer based console driver
fbcon-cfb* - low level framebuffer based operations for 8 bpp packed
pixels
How do I differentiate between the above two?

fbcmap.c 	- It handles color mapping
fbcon-plan2p*

I find fbdevhw.a & I find groups referring to it.
I think it is a library. If so, give me some inputs where we can use it.
Please do correct if I am going OFF-TRACK understanding FB drivers.

Where exactly should I place the fbdevhw.a in the above shown
architecture?

Regards,
Mukund jampala