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

PATCH New Federico Cuello 1 participant 1 message May 7, 2018 Sound

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Federico Cuello

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2018-05-07 16:42 UTC #0 lore raw

PATCH 1/1 ALSA: usb: mixer: volume quirk for CM102-A+/102S+

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.

---
 sound/usb/mixer.c | 8 ++++++++
 1 file changed, 8 insertions(+)

sound/usb/mixer.c +8 -0

index 344d7b069d59..bb5ab7a7dfa5 100644
@@ -967,6 +967,14 @@ 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):

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