[PATCH 4.19 050/146] ALSA: usb-audio: Add mixer workaround for TRX40 and co

From: Greg Kroah-Hartman
Date: Thu Apr 16 2020 - 11:55:17 EST


From: Takashi Iwai <tiwai@xxxxxxx>

commit 2a48218f8e23d47bd3e23cfdfb8aa9066f7dc3e6 upstream.

Some recent boards (supposedly with a new AMD platform) contain the
USB audio class 2 device that is often tied with HD-audio. The device
exposes an Input Gain Pad control (id=19, control=12) but this node
doesn't behave correctly, returning an error for each inquiry of
GET_MIN and GET_MAX that should have been mandatory.

As a workaround, simply ignore this node by adding a usbmix_name_map
table entry. The currently known devices are:
* 0414:a002 - Gigabyte TRX40 Aorus Pro WiFi
* 0b05:1916 - ASUS ROG Zenith II
* 0b05:1917 - ASUS ROG Strix
* 0db0:0d64 - MSI TRX40 Creator
* 0db0:543d - MSI TRX40

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=206543
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200408140449.22319-1-tiwai@xxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
sound/usb/mixer_maps.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -363,6 +363,14 @@ static const struct usbmix_name_map dell
{ 0 }
};

+/* Some mobos shipped with a dummy HD-audio show the invalid GET_MIN/GET_MAX
+ * response for Input Gain Pad (id=19, control=12). Skip it.
+ */
+static const struct usbmix_name_map asus_rog_map[] = {
+ { 19, NULL, 12 }, /* FU, Input Gain Pad */
+ {}
+};
+
/*
* Control map entries
*/
@@ -482,6 +490,26 @@ static struct usbmix_ctl_map usbmix_ctl_
.id = USB_ID(0x05a7, 0x1020),
.map = bose_companion5_map,
},
+ { /* Gigabyte TRX40 Aorus Pro WiFi */
+ .id = USB_ID(0x0414, 0xa002),
+ .map = asus_rog_map,
+ },
+ { /* ASUS ROG Zenith II */
+ .id = USB_ID(0x0b05, 0x1916),
+ .map = asus_rog_map,
+ },
+ { /* ASUS ROG Strix */
+ .id = USB_ID(0x0b05, 0x1917),
+ .map = asus_rog_map,
+ },
+ { /* MSI TRX40 Creator */
+ .id = USB_ID(0x0db0, 0x0d64),
+ .map = asus_rog_map,
+ },
+ { /* MSI TRX40 */
+ .id = USB_ID(0x0db0, 0x543d),
+ .map = asus_rog_map,
+ },
{ 0 } /* terminator */
};