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Commit 2d1cb7f6 authored by Yao-Wen Mao's avatar Yao-Wen Mao Committed by Takashi Iwai
Browse files

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



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

Signed-off-by: default avatarYao-Wen Mao <yaowen@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3a05d12f

sound/usb/mixer_maps.c

+24 −0
Original line number Diff line number Diff line
@@ -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 */

};