Re: [9fans] ctrl radeon: not working for ATI Radeon 9600 Mobility?

[erik quanstrom <quanstro@quanstro.net>]

> erik quanstrom wrote:
> > i think it's mainly a question of getting the best graphics
> > performance.  but these days the 2d accelleration (especially
> > for radeon) is fairly poor.
>
> Do you happen to have any workloads where this is a problem? There is
> a lot more we can do for the radeon, particularly the r100-r300 chips,
> which could improve draw performance.

i didn't make it clear that i'm using the vesa
interface.  and it's very slow for every day
use with acme, but it sure displays pictures quickly.

; pci | grep vid | grep 1002
1.5.0:	vid  03.00.00 1002/791e  10 0:d800000c 134217728 1:00000000 16 2:fbff0004 65536 3:00000000 16 4:0000a001 256 5:fbe00000 1048576
; pci 1002/791e
1002/791e
	ATI Technologies Inc RS690 [Radeon X1200 Series]

> To ask the radeon gpu to do anything interesting for you, you must
> carry out a series of register writes - for example, to fill a
> rectangle with a solid color, you write the rectangle's color to
> DP_BRUSH_FGRD_CLR (register 0x147c), the start to DST_X_Y, and the
> width and height to DST_WIDTH_HEIGHT. Everything you can ask the
> radeon to do is ultimately done via register writes.

i wonder if this pio doesn't explain a lot of the slowness.
i would have thought that they would have used a ring.

i hope you don't also pio the image data in?

- erik