[linux-audio-user] snd-hdsp+cardbus+M6807 notebook=distortion -- FIXED!

[David Hinds]

On Mon, Apr 12, 2004 at 08:28:01AM +0100, Russell King wrote:
> 
> > 3) FOR FURTHER INVESTIGATION: Does linux hdsp driver force the f0
> > value upon the 0x81 register or is it that in Linux one simply
> > cannot select d0 value for whatever reason
> 
> I suspect it may be caused by using a byte access to a longword-sized
> register.  0x81 is supposed to be accessed via:
> 
> setpci -s a.0 0x80.l
> 
> which of course means its bits 8 to 15.

I don't think so; I'm not sure what the PCI spec has to say about it,
but I have not had problems doing byte reads/writes for longer PCI
configuration registers.  Bit 9 of the sysctl register for the TI 1410
is "socket activity"; it is read only and is cleared after each read.
The key change is setting bit 14 (enable upstream burst reads).

Regarding the register at 0xc9, I don't think that is defined in any
TI bridge data sheet; it is in a "reserved" range.

-- Dave