From fa4d1f595a89234647b34a7f507436be873091bc Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Wed, 9 Mar 2011 11:25:00 +0200 Subject: [PATCH] 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 Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- sound/soc/omap/rx51.c | 4 ++++ 1 file changed, 4 insertions(+) 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 */ -- 2.20.1