usb: dwc2: gadget: unmask idstschng interrupt only if controller supports it

idstschng interrupt should not be used when id pin control is
external. This is already handled on dwc2 host part. Fix it on gadget
part as well.
Signed-off-by: NGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: NMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: NRobert Baldyga <r.baldyga@samsung.com>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: NJohn Youn <johnyoun@synopsys.com>
Acked-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc2/gadget.c

@@ -2285,6 +2285,7 @@ static int dwc2_hsotg_corereset(struct dwc2_hsotg *hsotg)
 void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 						bool is_usb_reset)
 {
+	u32 intmsk;
 	u32 val;
 
 	/* Kill any ep0 requests as controller will be reinitialized */
@@ -2316,14 +2317,16 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
 
 	/* Clear any pending interrupts */
 	dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
-
-	dwc2_writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT |
+	intmsk = GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT |
 		GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF |
-		GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST |
-		GINTSTS_RESETDET | GINTSTS_ENUMDONE |
-		GINTSTS_OTGINT | GINTSTS_USBSUSP |
-		GINTSTS_WKUPINT,
-		hsotg->regs + GINTMSK);
+		GINTSTS_USBRST | GINTSTS_RESETDET |
+		GINTSTS_ENUMDONE | GINTSTS_OTGINT |
+		GINTSTS_USBSUSP | GINTSTS_WKUPINT;
+
+	if (hsotg->core_params->external_id_pin_ctl <= 0)
+		intmsk |= GINTSTS_CONIDSTSCHNG;
+
+	dwc2_writel(intmsk, hsotg->regs + GINTMSK);
 
 	if (using_dma(hsotg))
 		dwc2_writel(GAHBCFG_GLBL_INTR_EN | GAHBCFG_DMA_EN |