From 02eb1d098e26f34c8f047b0b1cee6f4433a34bd1 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 16 Nov 2021 07:54:15 +0100
Subject: [PATCH] ALSA: usb-audio: Fix dB level of Bose Revolve+ SoundLink
Git-commit: 02eb1d098e26f34c8f047b0b1cee6f4433a34bd1
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
Patch-mainline: Queued in subsystem maintainer repository
References: bsc#1192375

Bose Revolve+ SoundLink (0a57:40fa) advertises invalid dB level for
the speaker volume.  This patch provides the correction in the mixer
map quirk table entry.

Note that this requires the prerequisite change to add min_mute flag
to the dB map table.

Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1192375
Link: https://lore.kernel.org/r/20211116065415.11159-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/usb/mixer_maps.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 9d71c569b148..5d391f62351b 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -337,6 +337,13 @@ static const struct usbmix_name_map bose_companion5_map[] = {
 	{ 0 }	/* terminator */
 };
 
+/* Bose Revolve+ SoundLink, correction of dB maps */
+static const struct usbmix_dB_map bose_soundlink_dB = {-8283, -0, true};
+static const struct usbmix_name_map bose_soundlink_map[] = {
+	{ 2, NULL, .dB = &bose_soundlink_dB },
+	{ 0 }	/* terminator */
+};
+
 /* Sennheiser Communications Headset [PC 8], the dB value is reported as -6 negative maximum  */
 static const struct usbmix_dB_map sennheiser_pc8_dB = {-9500, 0};
 static const struct usbmix_name_map sennheiser_pc8_map[] = {
@@ -522,6 +529,11 @@ static const struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.id = USB_ID(0x05a7, 0x1020),
 		.map = bose_companion5_map,
 	},
+	{
+		/* Bose Revolve+ SoundLink */
+		.id = USB_ID(0x05a7, 0x40fa),
+		.map = bose_soundlink_map,
+	},
 	{
 		/* Corsair Virtuoso SE (wired mode) */
 		.id = USB_ID(0x1b1c, 0x0a3d),
-- 
2.26.2