On Fri, 2010-02-19 at 14:39 +0100, ext Jarkko Nikula wrote:
On Fri, 19 Feb 2010 10:34:32 +0200 Peter Ujfalusi peter.ujfalusi@nokia.com wrote:
I'm not sure, but you might need to configure the taps as well to have the correct sidetone. Also I have a recollection, that the McBSP sidetone requires DSP mode (TDM) in order to operate correctly, so on Beagle you might need to set up 4 channel mode. And how the channel mapping in 4 channel mode works in McBSP sidetone is another matter...
It seems to work with I2S too.
For both channels? I don't recall so.. and for the one channel only, the FIR doesn't behave expectedly? (maybe this works [1,0,..0], but more sophisticated ones may not..)
I think I forgot to enable control 'McBSP2 Sidetone' when I last time tried this set (v1 or v2). But now my null test below works and I can hear that the level is changing when I adjust the volumes with amixer.
echo 32767 >/sys/devices/platform/omap-mcbsp.2/st_taps
arecord -f dat >/dev/null |aplay -f dat /dev/zero
amixer set -D hw:0 'McBSP2 Sidetone Channel 0' 32700 amixer set -D hw:0 'McBSP2 Sidetone Channel 0' 327 amixer set -D hw:0 'McBSP2 Sidetone Channel 0' -- -32700