The existing UAC2 implementation presents its EP OUT as
USB_ENDPOINT_SYNC_ASYNC.
However:
1) f_uac2 does not define any feedback endpoint
2) IMO in reality it is adaptive - the USB host is the one which sets
the pace of data.
Changing USB_ENDPOINT_SYNC_ASYNC to USB_ENDPOINT_SYNC_ADAPTIVE for the FS
and HS output endpoints corrects the config to reflect real functionality.
Also, the change makes the UAC2 gadget recognized and working
in MS Windows.
Signed-off-by: Pavel Hofman <pavel.hofman@xxxxxxxxxxx>
---
drivers/usb/gadget/function/f_uac2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/function/f_uac2.c
b/drivers/usb/gadget/function/f_uac2.c
index db2d498..e8c9dd1 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -273,7 +273,7 @@ enum {
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE,
.wMaxPacketSize = cpu_to_le16(1023),
.bInterval = 1,
};
@@ -282,7 +282,7 @@ enum {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE,
.wMaxPacketSize = cpu_to_le16(1024),
.bInterval = 4,
};
--
1.9.1
