linux-kernel - Re: [PATCH RFC v2] radio-sf16fmr2: convert to generic TEA575x interface

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Message-Id: <201105152326.33925.hverkuil@xs4all.nl>
Date:	Sun, 15 May 2011 23:26:33 +0200
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Ondrej Zary <linux@...nbow-software.org>
Cc:	linux-media@...r.kernel.org, alsa-devel@...a-project.org,
	"Kernel development list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v2] radio-sf16fmr2: convert to generic TEA575x interface

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...)

Regards,

	Hans
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