On Tuesday 23 March 2010 12:02:10 ext Mark Brown wrote:
> On Tue, Mar 23, 2010 at 09:59:13AM +0200, Peter Ujfalusi wrote:
> > /*
> >
> > * Gain controls tied to outputs
> > * -6 dB to 6 dB in 6 dB steps (mute instead of -12)
> > */
> >
> > static const unsigned int output_tlv[] = {
> >
> > TLV_DB_RANGE_HEAD(4),
> > 0, 0, TLV_DB_SCALE_ITEM(-1200, 0, 1),
> > 3, 3, TLV_DB_SCALE_ITEM(-600, 0, 0),
> > 2, 2, TLV_DB_SCALE_ITEM(0, 0, 0),
> > 1, 1, TLV_DB_SCALE_ITEM(600, 0, 0),
> >
> > };
> >
> > I'm not sure about the tlv declaration, but is there a way to actually
> > map the gain/power control in the TWL in a standard way?
>
> I'd expect that to work in that userspace will see the various values
> with the expected gains but I'd not expect that applications would
> reorder the values so it'll look odd in the UI. But I've not actually
> tried it.
Indeed it look odd at the end:
amixer sset 'PreDriv' 0
Front Left: Playback 0 [0%] [-99999.99dB]
Front Right: Playback 0 [0%] [-99999.99dB]
amixer sset 'PreDriv' 1
Front Left: Playback 1 [33%] [6.00dB]
Front Right: Playback 1 [33%] [6.00dB]
amixer sset 'PreDriv' 2
Front Left: Playback 2 [67%] [0.00dB]
Front Right: Playback 2 [67%] [0.00dB]
amixer sset 'PreDriv' 3
Front Left: Playback 3 [100%] [-6.00dB]
Front Right: Playback 3 [100%] [-6.00dB
It worth a try anyway.
--
Péter
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