[alsa-devel] Update on TLV320AIC3204 Driver
redhatter at gentoo.org
Wed Jun 16 00:59:25 CEST 2010
On Tue, Jun 15, 2010 at 04:42:32PM +0300, Peter Ujfalusi wrote:
> On Tuesday 15 June 2010 08:11:10 ext Stuart Longland wrote:
> > Okay, I've had a close inspection of how the SOC_DOUBLE_R_SX_TLV widgets
> > are implemented. I couldn't find where in the git trees the control had
> > been added, I wound up applying this patch myself in my tree... it
> > apparently got applied in the official trees, but I cannot find it.
> I'm not really sure what the SOC_DOUBLE_R_SX_TLV is for...
> But would a simple SOC_DOUBLE_R_TLV enough for the aic3204 codec?
> I have not looked at the datasheet (if it is available), but I'll try to find
http://focus.ti.com/docs/prod/folders/print/tlv320aic3204.html has the
As I mentioned; the bitfields are signed integers, 6 bits wide in the
case of the example given, there are some that are 7 bits.
In the examples that I gave (driver gain settings), they have a range of
-6dB to 29dB... which corresponds to bitfield values of 0x3a (for -6dB)
and 0x1d (for 29dB).
I did try using the regular TLV macro, and found that the volume
"wrapped" around in a very undesirable fashion. SOC_DOUBLE_R_SX_TLV was
the suggestion made at the time. The way it is now, it works okay
... if you leave the mute untouched.
Stuart Longland (aka Redhatter, VK4MSL) .'''.
Gentoo Linux/MIPS Cobalt and Docs Developer '.'` :
. . . . . . . . . . . . . . . . . . . . . . .'.'
I haven't lost my mind...
...it's backed up on a tape somewhere.
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