Bug#346345: linux-source-2.6.15: radeonfb has inverted frequencies for core/memory?

[Sven Luther <sven.luther@wanadoo.fr>]

On Sun, Jan 08, 2006 at 12:15:45AM -0800, obi wrote:
> On Sun, Jan 08, 2006 at 08:25:46AM +0100, Sven Luther wrote:
> > On Sat, Jan 07, 2006 at 05:43:47PM -0800, obi wrote:
> > > radeonfb: Retreived PLL infos from BIOS
> > > radeonfb: Reference=27.00 MHz (RefDiv=12) Memory=252.00 Mhz, System=200.00 MHz
> > > 
> > > and this is what rovclock -i ells 
> > > 
> > > Reference clock from BIOS: 27.0 MHz
> > > XTAL: 27.0 MHz, RefDiv: 6
> > > 
> > > Core: 252.0 MHz, Mem: 200.25 MHz
> > 
> > Sounds like a rovclock bug, since radeonfb has it right ?
> 
> Well, the ati command (what was that atitool?) when I tested fglrx
> reported the same as rovclock. And Xorg repors
> 
> (II) RADEON(0): PLL parameters: rf=2700 rd=12 min=20000 max=35000;
> xclk=20000

These are probably the output parameters, for the screen or something.

> but I'm not sure how to parse them ...  

Can you check what the real values are, maybe by using some windows tool on
the box, or by hunting the specs of your model on the manufacturer's site or
on various review sites ?

> If those are indeed the right values, that would definetely explain why I
> didn't have any problems so far :).

Well, the other possibility is that the kernel gets it right, but fails to
export it correctly to userland, thus confusing rovclock.

The 200Mhz core clock and 252Mhz ram clock sounds fine and logical.

Friendly,

Sven Luther