From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Fri, 28 Mar 2025 04:59:31 +0000 (+0900)
Subject: usb: gadget: k1x_udc_core: Add the 1msec as workaround in irq_process_tr_complete
X-Git-Tag: accepted/tizen/unified/20250514.114144~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a553bc2688f65b99a1c388c9e0e4a6ae91684f8c;p=platform%2Fkernel%2Flinux-riscv.git

usb: gadget: k1x_udc_core: Add the 1msec as workaround in irq_process_tr_complete

For Tizen, Add udelay(1000) in irq_process_tr_complete.
This patch is a Workaround code to use UDC.
When run tizen flash manage, it need to add udelay(1000).
Otherwise, usb isn't connected.

Change-Id: Ib8f866cd363a2852ae29448e0b3dcf962831ac3e
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
---

diff --git a/drivers/usb/gadget/udc/k1x_udc_core.c b/drivers/usb/gadget/udc/k1x_udc_core.c
index 157a0d90dac2..37e6d2d753bf 100644
--- a/drivers/usb/gadget/udc/k1x_udc_core.c
+++ b/drivers/usb/gadget/udc/k1x_udc_core.c
@@ -2006,8 +2006,11 @@ static void irq_process_tr_complete(struct mv_udc *udc)
 	/* Process non-setup transaction complete interrupts */
 	tmp = readl(&udc->op_regs->epcomplete);
 
-	if (!tmp)
+	if (!tmp) {
+		/*  WORKAROUND: Add 1msec for TIZEN */
+		udelay(1000);
 		return;
+	}
 
 	writel(tmp, &udc->op_regs->epcomplete);