Yes!!! the feedback works correctly this way => perfect playback!
what I had to do was:
[...]
f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
f /= 8;
if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
spin_lock_irqsave(&subs->lock, flags);
subs->freqm = f;
[...]
otherwise, the 'if' condition would still not be satisfied.
Words can not describe how thankful I am about this one!
Now, is there a way to incorporate this change into the driver without
affecting functionality for other usb audio devices?
On Fri, Feb 22, 2008 at 6:31 PM, Clemens Ladisch <clemens@xxxxxxxxxx> wrote:
> Adrian Stancu wrote:
> > According to dmesg, the device is running at high speed:
> > usb 1-6: new high speed USB device using ehci_hcd and address 20
> >
>
> > So, if I convert the freq using the high speed formula, I get a value
> > within the acceptable range,
>
> No; the device is high speed, but it sends a full speed feedback value.
>
> Please try "subs->freqm = f / 8;"
>
>
> The value quoted in your previous message was exactly 48000 Hz; please
> check if it ever changes.
>
>
> Regards,
> Clemens
>
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