f_sdp: Change bInterval of interrupt endpoint to 3

Since the USB HID limits the maximum bandwidth(3072) for interrupt
endpoint transfers, when the bInterval set to 1, we can only support 3
boards to run sdp at the same time. In order to support more boards,
change the bInterval of interrupt endpoint to 3, which will not affect
the transmission speed.

Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

diff --git a/drivers/usb/gadget/f_sdp.c b/drivers/usb/gadget/f_sdp.c
index c5b3594..e48aa2f 100644 (file)
--- a/drivers/usb/gadget/f_sdp.c
+++ b/drivers/usb/gadget/f_sdp.c
@@ -186,7 +186,7 @@ static struct usb_endpoint_descriptor in_hs_desc = {
        .bEndpointAddress =     1 | USB_DIR_IN,
        .bmAttributes = USB_ENDPOINT_XFER_INT,
        .wMaxPacketSize =       512,
-       .bInterval =            1,
+       .bInterval =            3,
 };
 
 static struct usb_endpoint_descriptor out_hs_desc = {
@@ -196,7 +196,7 @@ static struct usb_endpoint_descriptor out_hs_desc = {
        .bEndpointAddress =     1 | USB_DIR_OUT,
        .bmAttributes =         USB_ENDPOINT_XFER_INT,
        .wMaxPacketSize =       SDP_HID_PACKET_SIZE_EP1,
-       .bInterval =            1,
+       .bInterval =            3,
 };
 
 static struct usb_descriptor_header *sdp_runtime_descs[] = {