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-rw-r--r--sound/usb/quirks.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 27817266867..0f58b4b6d70 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -761,3 +761,27 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
}
}
+void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
+{
+ /*
+ * "Playback Design" products send bogus feedback data at the start
+ * of the stream. Ignore them.
+ */
+ if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) &&
+ ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
+ ep->skip_packets = 4;
+}
+
+void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
+ __u8 request, __u8 requesttype, __u16 value,
+ __u16 index, void *data, __u16 size)
+{
+ /*
+ * "Playback Design" products need a 20ms delay after each
+ * class compliant request
+ */
+ if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
+ (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
+ mdelay(20);
+}
+