Hi,
On 18/02/2019 11:23, Yu Chen wrote:
[...]
> @@ -522,6 +556,15 @@ int dwc3_drd_init(struct dwc3 *dwc)
> dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
> }
>
> + dwc3_role_switch.fwnode = dev_fwnode(dwc->dev);
> + dwc3_role_switch.set = dwc3_usb_role_switch_set;
> + dwc3_role_switch.get = dwc3_usb_role_switch_get;
> + dwc->role_sw = usb_role_switch_register(dwc->dev, &dwc3_role_switch);
Building arm64 defconfig gives me this:
drivers/usb/dwc3/drd.o: In function `dwc3_drd_exit':
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:604: undefined reference to `usb_role_switch_unregister'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:604:(.text+0x814): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `usb_role_switch_unregister'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:604: undefined reference to `usb_role_switch_unregister'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:604:(.text+0x844): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `usb_role_switch_unregister'
drivers/usb/dwc3/drd.o: In function `dwc3_drd_init':
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:562: undefined reference to `usb_role_switch_register'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:562:(.text+0xa20): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `usb_role_switch_register'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:562: undefined reference to `usb_role_switch_register'
/home/valsch01/Work/kernel/drivers/usb/dwc3/drd.c:562:(.text+0xb4c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `usb_role_switch_register'
Makefile:1024: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1
This has CONFIG_USB_ROLE_SWITCH=m, setting it as a built-in makes the thing
linkable.
I suppose that's because defconfig gives us
CONFIG_USB_DWC3_DUAL_ROLE=y
but then that should probably force a CONFIG_USB_ROLE_SWITCH=y. My
immediate reaction to this would be to add:
---
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 2b1494460d0c..661b1d2efc8b 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -44,6 +44,7 @@ config USB_DWC3_DUAL_ROLE
bool "Dual Role mode"
depends on ((USB=y || USB=USB_DWC3) && (USB_GADGET=y || USB_GADGET=USB_DWC3))
depends on (EXTCON=y || EXTCON=USB_DWC3)
+ select USB_ROLE_SWITCH
help
This is the default mode of working of DWC3 controller where
both host and gadget features are enabled.
---
Not sure how acceptable that is though.
> + if (ret) {
> + dwc3_drd_exit(dwc);
> + return PTR_ERR(dwc->role_sw);
> + }
> +
> return 0;
> }
>
> @@ -557,4 +600,6 @@ void dwc3_drd_exit(struct dwc3 *dwc)
>
> if (!dwc->edev)
> free_irq(dwc->otg_irq, dwc);
> +
> + usb_role_switch_unregister(dwc->role_sw);
> }
>
