usb: dwc3: gadget: increase tx fifo size for ss isoc endpoints

Improve performance of isoc transfers in superspeed by increasing the
number of possible endpoints available, matching that of what was
configured for bulk transfers.

Signed-off-by: Dan Vacura <w36195@motorola.com>
Link: https://lore.kernel.org/r/20220420183338.445622-1-w36195@motorola.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 66a256c..c3d95f9 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -782,7 +782,8 @@ static int dwc3_gadget_resize_tx_fifos(struct dwc3_ep *dep)
                num_fifos = 3;
 
        if (dep->endpoint.maxburst > 6 &&
-           usb_endpoint_xfer_bulk(dep->endpoint.desc) && DWC3_IP_IS(DWC31))
+           (usb_endpoint_xfer_bulk(dep->endpoint.desc) ||
+            usb_endpoint_xfer_isoc(dep->endpoint.desc)) && DWC3_IP_IS(DWC31))
                num_fifos = dwc->tx_fifo_resize_max_num;
 
        /* FIFO size for a single buffer */