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authorTakashi Iwai <tiwai@suse.de>2009-09-10 15:33:06 +0200
committerTakashi Iwai <tiwai@suse.de>2009-09-10 15:33:06 +0200
commitb34c8663940dfc7da767c42b37605e5ad3ae11f7 (patch)
tree3e6639dd10ec737651871649c14fff9798511afa /sound
parent3827119e207823ff0f3e85271bef7a0dc953ee38 (diff)
parenteedbdf03a25ab3b2c332ad7fa205aa8ffbe477ba (diff)
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Merge branch 'topic/tlv-minmax' into for-linus
* topic/tlv-minmax: ALSA: usb-audio - Correct bogus volume dB information ALSA: usb-audio - Use the new TLV_DB_MINMAX type ALSA: Add new TLV types for dBwith min/max
Diffstat (limited to 'sound')
-rw-r--r--sound/core/vmaster.c8
-rw-r--r--sound/usb/usbmixer.c13
2 files changed, 17 insertions, 4 deletions
diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c
index 257624bd199..3b9b550109c 100644
--- a/sound/core/vmaster.c
+++ b/sound/core/vmaster.c
@@ -353,7 +353,8 @@ static void master_free(struct snd_kcontrol *kcontrol)
*
* The optional argument @tlv can be used to specify the TLV information
* for dB scale of the master control. It should be a single element
- * with #SNDRV_CTL_TLVT_DB_SCALE type, and should be the max 0dB.
+ * with #SNDRV_CTL_TLVT_DB_SCALE, #SNDRV_CTL_TLV_DB_MINMAX or
+ * #SNDRV_CTL_TLVT_DB_MINMAX_MUTE type, and should be the max 0dB.
*/
struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
const unsigned int *tlv)
@@ -384,7 +385,10 @@ struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
kctl->private_free = master_free;
/* additional (constant) TLV read */
- if (tlv && tlv[0] == SNDRV_CTL_TLVT_DB_SCALE) {
+ if (tlv &&
+ (tlv[0] == SNDRV_CTL_TLVT_DB_SCALE ||
+ tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX ||
+ tlv[0] == SNDRV_CTL_TLVT_DB_MINMAX_MUTE)) {
kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
memcpy(master->tlv, tlv, sizeof(master->tlv));
kctl->tlv.p = master->tlv;
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
index ec9cdf98692..df8969188d1 100644
--- a/sound/usb/usbmixer.c
+++ b/sound/usb/usbmixer.c
@@ -461,7 +461,7 @@ static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *_tlv)
{
struct usb_mixer_elem_info *cval = kcontrol->private_data;
- DECLARE_TLV_DB_SCALE(scale, 0, 0, 0);
+ DECLARE_TLV_DB_MINMAX(scale, 0, 0);
if (size < sizeof(scale))
return -ENOMEM;
@@ -469,7 +469,16 @@ static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
* while ALSA TLV contains in 1/100 dB unit
*/
scale[2] = (convert_signed_value(cval, cval->min) * 100) / 256;
- scale[3] = (convert_signed_value(cval, cval->res) * 100) / 256;
+ scale[3] = (convert_signed_value(cval, cval->max) * 100) / 256;
+ if (scale[3] <= scale[2]) {
+ /* something is wrong; assume it's either from/to 0dB */
+ if (scale[2] < 0)
+ scale[3] = 0;
+ else if (scale[2] > 0)
+ scale[2] = 0;
+ else /* totally crap, return an error */
+ return -EINVAL;
+ }
if (copy_to_user(_tlv, scale, sizeof(scale)))
return -EFAULT;
return 0;