diff options
| author | Trent Piepho <xyzzy@speakeasy.org> | 2007-09-06 23:02:25 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-10-22 12:01:18 -0200 |
| commit | bbaccc04459d5cedb342228084223143fbc285e5 (patch) | |
| tree | 8d6fdee011532e769db017e9575df676701b360c /drivers/media/video/cx88/cx88-alsa.c | |
| parent | 54ac005adcda1a9e4566df6fa87acd4a1c135b80 (diff) | |
V4L/DVB (6187): cx88-alsa: Add TLV support
Lets mixer apps display a dB range for the volume control.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/cx88/cx88-alsa.c')
| -rw-r--r-- | drivers/media/video/cx88/cx88-alsa.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c index 6cf8609588a..40ffd7a5579 100644 --- a/drivers/media/video/cx88/cx88-alsa.c +++ b/drivers/media/video/cx88/cx88-alsa.c @@ -39,6 +39,7 @@ #include <sound/pcm_params.h> #include <sound/control.h> #include <sound/initval.h> +#include <sound/tlv.h> #include "cx88.h" #include "cx88-reg.h" @@ -605,12 +606,17 @@ 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, |