X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fsound%2Fusb%2Fmixer_maps.c;fp=kernel%2Fsound%2Fusb%2Fmixer_maps.c;h=1f8fb0d904e059d4e6084d0c221489d598e9e4c1;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=ddca6547399b0103b37abbdf73cfa5c9e710a7fd;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/sound/usb/mixer_maps.c b/kernel/sound/usb/mixer_maps.c
index ddca65473..1f8fb0d90 100644
--- a/kernel/sound/usb/mixer_maps.c
+++ b/kernel/sound/usb/mixer_maps.c
@@ -348,6 +348,16 @@ static struct usbmix_name_map bose_companion5_map[] = {
 	{ 0 }	/* terminator */
 };
 
+/*
+ * Dell usb dock with ALC4020 codec had a firmware problem where it got
+ * screwed up when zero volume is passed; just skip it as a workaround
+ */
+static const struct usbmix_name_map dell_alc4020_map[] = {
+	{ 16, NULL },
+	{ 19, NULL },
+	{ 0 }
+};
+
 /*
  * Control map entries
  */
@@ -430,6 +440,10 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.id = USB_ID(0x0ccd, 0x0028),
 		.map = aureon_51_2_map,
 	},
+	{
+		.id = USB_ID(0x0bda, 0x4014),
+		.map = dell_alc4020_map,
+	},
 	{
 		.id = USB_ID(0x0dba, 0x1000),
 		.map = mbox1_map,