From: Federico Cuello <fedux@fedux.com.ar>
Date: Tue, 8 May 2018 22:13:38 +0000 (+0200)
Subject: ALSA: usb: mixer: volume quirk for CM102-A+/102S+
X-Git-Tag: Ubuntu-4.15.0-33.36~268
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=79932087c1851ae9f8de2a7b35f5d4338f7397eb;p=mirror_ubuntu-bionic-kernel.git

ALSA: usb: mixer: volume quirk for CM102-A+/102S+

BugLink: http://bugs.launchpad.net/bugs/1782846

commit 21493316a3c4598f308d5a9fa31cc74639c4caff upstream.

Currently it's not possible to set volume lower than 26% (it just mutes).

Also fixes this warning:

  Warning! Unlikely big volume range (=9472), cval->res is probably wrong.
  [13] FU [PCM Playback Volume] ch = 2, val = -9473/-1/1

, and volume works fine for full range.

Signed-off-by: Federico Cuello <fedux@fedux.com.ar>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
---

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 20b28a5a1456..5d6cd4eb8101 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -911,6 +911,14 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
 		}
 		break;
 
+	case USB_ID(0x0d8c, 0x0103):
+		if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
+			usb_audio_info(chip,
+				 "set volume quirk for CM102-A+/102S+\n");
+			cval->min = -256;
+		}
+		break;
+
 	case USB_ID(0x0471, 0x0101):
 	case USB_ID(0x0471, 0x0104):
 	case USB_ID(0x0471, 0x0105):