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| author | Jarkko Nikula <jhnikula@gmail.com> | 2011-03-09 12:25:00 +0300 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2011-03-09 13:52:28 +0300 |
| commit | fa4d1f595a89234647b34a7f507436be873091bc (patch) | |
| tree | 3ce719294b6ffd656f66cc9ee4ec3bbc1c1e111e /sound | |
| parent | 9d7e584b3fb4d9f581b83c0916e10b91de78e663 (diff) | |
| download | linux-fa4d1f595a89234647b34a7f507436be873091bc.tar.xz | |
ASoC: omap: rx51: Enable McBSP2 sidetone
McBSP sidetone is needed in telephony applications. McBSP sidetone is a
configurable FIR filter that forms a loopback from McBSP input to output.
This patch enables the McBSP2 sidetone ALSA controls so that it can be used
on Nokia RX-51/N900.
Sidetone feature can be tested with following commands:
(set up codec input and output paths)
# Enable and configure sidetone
amixer -D hw:0 set 'McBSP2 Sidetone' on
amixer set -D hw:0 'McBSP2 Sidetone Channel 0' 32767
echo 32767 >/sys/devices/platform/omap-mcbsp.2/st_taps
# Do not loop audio via CPU
arecord -f dat >/dev/null |aplay /dev/zero
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/omap/rx51.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c index 055e447b2ed6..d0986220eff9 100644 --- a/sound/soc/omap/rx51.c +++ b/sound/soc/omap/rx51.c @@ -331,6 +331,10 @@ static int rx51_aic34_init(struct snd_soc_pcm_runtime *rtd) return err; snd_soc_limit_volume(codec, "TPA6130A2 Headphone Playback Volume", 42); + err = omap_mcbsp_st_add_controls(codec, 1); + if (err < 0) + return err; + snd_soc_dapm_sync(dapm); /* AV jack detection */ |