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usb: dwc3: core: Print warning on unsupported speed

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The user may have more information to override the HW parameter to
specify the maximum_speed. However, if the user specifies a
maximum_speed that the controller doesn't support, print out a warning.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Thinh Nguyen 2020-07-24 14:01:09 -07:00 committed by Felipe Balbi
parent b574ce3ee4
commit e518bdd9f0
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/dwc3/core.c
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@ -1399,8 +1399,17 @@ static void dwc3_check_params(struct dwc3 *dwc)
case USB_SPEED_LOW:
case USB_SPEED_FULL:
case USB_SPEED_HIGH:
break;
case USB_SPEED_SUPER:
if (hwparam_gen == DWC3_GHWPARAMS3_SSPHY_IFC_DIS)
dev_warn(dev, "UDC doesn't support Gen 1\n");
break;
case USB_SPEED_SUPER_PLUS:
if ((DWC3_IP_IS(DWC32) &&
hwparam_gen == DWC3_GHWPARAMS3_SSPHY_IFC_DIS) ||
(!DWC3_IP_IS(DWC32) &&
hwparam_gen != DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
dev_warn(dev, "UDC doesn't support SSP\n");
break;
default:
dev_err(dev, "invalid maximum_speed parameter %d\n",