ALSA: usb-audio: Add mute TLV for playback volumes on C-Media devices

[karo-tx-linux.git] / sound / usb / mixer.c

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 082736c539bc14eec73a1afad11e2a3cd5577d89..e630813c5008627d50e41637e03eeaf8ef2bf0c3 100644 (file)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -542,6 +542,8 @@ int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 
        if (size < sizeof(scale))
                return -ENOMEM;
+       if (cval->min_mute)
+               scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE;
        scale[2] = cval->dBmin;
        scale[3] = cval->dBmax;
        if (copy_to_user(_tlv, scale, sizeof(scale)))