# Re: Add three new IOCTLs to FB API

- From: Michel Dänzer \<hidden\>
- Date: 2003-09-22 10:23:34 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2003/09/13451867
- Thread: https://ratatoskr.run/linux-fbdev/2003/09/13451863/t.md

```text
On Mon, 2003-09-22 at 07:28, Jon Smirl wrote:
> 
> In order to load DRM 3D support I need two pieces of information. The name of
> the 3D DRM driver and the bus:dev:func of the hardware. DRM does not implement
> PCI ID probing, instead you need to it what hardware to use. 
> 
> By adding these to the FB API you can start standalone Mesa just by specifying
> the name of the FB device to use. I can pick up mode and resolution from the
> existing FB API.
> 
> 1) Get location of card that is associated with this fb device. It would return
> bus,dev,func of hardware. There may be more than one piece of the same hardware
> installed.
> 
> 3) Get vendor and card PCI ID
> 
> 2) Get 3D driver name. Return the name of the DRM driver that is associated
> with this fb device. For example aty128fb would return r128, radeonfb would
> return radeon. Empty string if there is none. There are eight DRM drivers and
> 15 fb ones.

For radeon, you also need to know whether it's an R100 or R200 core (for
the 3D driver, as Ian pointed out, but also for the CP init ioctl).

Maybe these could be handled via sysfs instead of adding ioctls?

Also, at least with radeonfb, the fix.id field contains the chip ID.


-- 
Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer



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