[alsa-devel] [PATCH RFC v2] radio-sf16fmr2: convert to generic TEA575x interface

Hans Verkuil hverkuil at xs4all.nl
Sun May 15 23:26:33 CEST 2011

On Sunday, May 15, 2011 22:18:21 Ondrej Zary wrote:
> Thanks, it's much simpler with the new control framework.
> Do the negative volume control values make sense? The TC9154A chip can
> attenuate the volume from 0 to -68dB in 2dB steps.

It does make sense, but I think I would offset the values so they start at 0.
Mostly because there might be some old apps that set the volume to 0 when they
want to mute, which in this case is full volume.

I am not aware of any driver where a volume of 0 isn't the same as the lowest
volume possible, so in this particular case I would apply an offset.

I will have to do a closer review tomorrow or the day after. I think there are
a few subtleties that I need to look at. Ping me if you haven't heard from me
by Wednesday. I would really like to get these drivers up to spec now that I
have someone who can test them, and once that's done I hope that I never have
to look at them again :-) (Unlikely, but one can dream...)



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