usb: dwc3: Update maximum_speed for SuperSpeedPlus
If the maximum_speed is not set, set it to a known value, either
SuperSpeed or SuperSpeedPlus based on the type of controller we are
using. If we are on DWC_usb31 controller, check the PHY interface to see
if it is capable of SuperSpeedPlus.
Also this check is moved after dwc3_core_init() so that we can check
dwc->revision.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index de5e01f..001c755 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -962,10 +962,6 @@
fladj = pdata->fladj_value;
}
- /* default to superspeed if no maximum_speed passed */
- if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
- dwc->maximum_speed = USB_SPEED_SUPER;
-
dwc->lpm_nyet_threshold = lpm_nyet_threshold;
dwc->tx_de_emphasis = tx_de_emphasis;
@@ -1016,6 +1012,19 @@
goto err1;
}
+ /* default to superspeed if no maximum_speed passed */
+ if (dwc->maximum_speed == USB_SPEED_UNKNOWN) {
+ dwc->maximum_speed = USB_SPEED_SUPER;
+
+ /*
+ * default to superspeed plus if we are capable.
+ */
+ if (dwc3_is_usb31(dwc) &&
+ (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
+ DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
+ dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
+ }
+
/* Adjust Frame Length */
dwc3_frame_length_adjustment(dwc, fladj);