ALSA: usb-audio: Add mixer workaround for TRX40 and co

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@vger.kernel.org>
Link: https://lore.kernel.org/r/20200408140449.22319-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 5ebca80..72b575c 100644 (file)
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -359,6 +359,14 @@ static const struct usbmix_name_map corsair_virtuoso_map[] = {
        { 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
  */
@@ -488,6 +496,26 @@ static const struct usbmix_ctl_map usbmix_ctl_maps[] = {
                .id = USB_ID(0x1b1c, 0x0a42),
                .map = corsair_virtuoso_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 */
 };