usb: dwc2: Set AHB burst size to INCR

Changed AHB burst size from INCR4 to INCR by default.
With this value driver shows excellent DMA performance.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Razmik Karapetyan <razmik@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 1b6e4ccda6175356ad9d612ddf8766139d22bf65..cc9bf68b5e7c1dae1b47a1f8b7b7490f081bd8c9 100644 (file)
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -408,7 +408,7 @@ enum dwc2_ep0_state {
  * @ahbcfg:             This field allows the default value of the GAHBCFG
  *                      register to be overridden
  *                       -1         - GAHBCFG value will be set to 0x06
- *                                    (INCR4, default)
+ *                                    (INCR, default)
  *                       all others - GAHBCFG value will be overridden with
  *                                    this value
  *                      Not all bits can be controlled like this, the

diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 82f5846d767152cfa7fde5882b6db2c00c8a5798..430325510812495774cddf16026ab005efc678c5 100644 (file)
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -280,7 +280,7 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
        p->hibernation = false;
        p->max_packet_count = hw->max_packet_count;
        p->max_transfer_size = hw->max_transfer_size;
-       p->ahbcfg = GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT;
+       p->ahbcfg = GAHBCFG_HBSTLEN_INCR << GAHBCFG_HBSTLEN_SHIFT;
 
        if ((hsotg->dr_mode == USB_DR_MODE_HOST) ||
            (hsotg->dr_mode == USB_DR_MODE_OTG)) {