From b192ede34d629b1a1ac13ea1931e2d859c747f45 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Thu, 6 Sep 2007 19:02:25 -0700 Subject: cx88-alsa: Add TLV support From: Trent Piepho Lets mixer apps display a dB range for the volume control. Signed-off-by: Trent Piepho --- linux/drivers/media/video/cx88/cx88-alsa.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/linux/drivers/media/video/cx88/cx88-alsa.c b/linux/drivers/media/video/cx88/cx88-alsa.c index bb6196ea7..dab6fbc06 100644 --- a/linux/drivers/media/video/cx88/cx88-alsa.c +++ b/linux/drivers/media/video/cx88/cx88-alsa.c @@ -39,6 +39,7 @@ #include #include #include +#include #include "compat.h" #include "cx88.h" @@ -658,12 +659,17 @@ static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol, return changed; } +static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0); + static struct snd_kcontrol_new snd_cx88_volume = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_READ, .name = "Playback Volume", .info = snd_cx88_volume_info, .get = snd_cx88_volume_get, .put = snd_cx88_volume_put, + .tlv.p = snd_cx88_db_scale, }; static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol, -- cgit v1.2.3