---

yaml
---
r: 148508
b: refs/heads/master
c: 92a4379
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ca85b6ba59b69b7b5adcc64a98bd2478f73b2542
+refs/heads/master: 92a43793a908f395dc687e6c5fc90d63f999d6d5

trunk/sound/usb/usbaudio.c

@@ -3279,6 +3279,25 @@ static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
 	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
 }
 
+/*
+ * C-Media CM6206 is based on CM106 with two additional
+ * registers that are not documented in the data sheet.
+ * Values here are chosen based on sniffing USB traffic
+ * under Windows.
+ */
+static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
+{
+	int err, reg;
+	int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
+
+	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
+		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
+		if (err < 0)
+			return err;
+	}
+
+	return err;
+}
 
 /*
  * Setup quirks
@@ -3565,6 +3584,12 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 			goto __err_val;
 	}
 
+	/* C-Media CM6206 / CM106-Like Sound Device */
+	if (id == USB_ID(0x0d8c, 0x0102)) {
+		if (snd_usb_cm6206_boot_quirk(dev) < 0)
+			goto __err_val;
+	}
+
 	/*
 	 * found a config.  now register to ALSA
 	 */