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ALSA: usb-audio: add dB range mapping for some devices

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Add the correct dB ranges of Bose Companion 5 and Drangonfly DAC 1.2.

Signed-off-by: Yao-Wen Mao <yaowen@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Yao-Wen Mao 2015-07-29 15:13:54 +08:00 committed by Takashi Iwai
parent 3a05d12f46
commit 2d1cb7f658
1 changed files with 24 additions and 0 deletions
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24
sound/usb/mixer_maps.c
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@ -341,6 +341,20 @@ static const struct usbmix_name_map scms_usb3318_map[] = {
{ 0 }
};
/* Bose companion 5, the dB conversion factor is 16 instead of 256 */
static struct usbmix_dB_map bose_companion5_dB = {-5006, -6};
static struct usbmix_name_map bose_companion5_map[] = {
{ 3, NULL, .dB = &bose_companion5_dB },
{ 0 } /* terminator */
};
/* Dragonfly DAC 1.2, the dB conversion factor is 1 instead of 256 */
static struct usbmix_dB_map dragonfly_1_2_dB = {0, 5000};
static struct usbmix_name_map dragonfly_1_2_map[] = {
{ 7, NULL, .dB = &dragonfly_1_2_dB },
{ 0 } /* terminator */
};
/*
* Control map entries
*/
@ -451,6 +465,16 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
.id = USB_ID(0x25c4, 0x0003),
.map = scms_usb3318_map,
},
{
/* Bose Companion 5 */
.id = USB_ID(0x05a7, 0x1020),
.map = bose_companion5_map,
},
{
/* Dragonfly DAC 1.2 */
.id = USB_ID(0x21b4, 0x0081),
.map = dragonfly_1_2_map,
},
{ 0 } /* terminator */
};