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usb: dwc3: Increase DWC3 controller halt timeout

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Since EP0 transactions need to be completed before the controller halt
sequence is finished, this may take some time depending on the host and the
enabled functions.  Increase the controller halt timeout, so that we give
the controller sufficient time to handle EP0 transfers.

This patch was originally submitted to Linux in 2022, but is required to
use USB gadget mode on my device in U-Boot.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=461ee467507cb98a348fa91ff8460908bb0ea423

Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
Link: https://lore.kernel.org/r/20260115230135.183158-3-macroalpha82@gmail.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
This commit is contained in:
Chris Morgan 2026-01-15 17:01:33 -06:00 committed by Mattijs Korpershoek
parent add7152eb0
commit 7590f29e2c
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/dwc3/gadget.c
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@ -1396,7 +1396,7 @@ static int dwc3_gadget_set_selfpowered(struct usb_gadget *g,
static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
{
u32 reg;
u32 timeout = 500;
u32 timeout = 2000;
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (is_on) {
@ -1425,6 +1425,7 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
do {
udelay(2000);
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
if (is_on) {
if (!(reg & DWC3_DSTS_DEVCTRLHLT))
@ -1436,7 +1437,6 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
timeout--;
if (!timeout)
return -ETIMEDOUT;
udelay(1);
} while (1);
dev_vdbg(dwc->dev, "gadget %s data soft-%s\n",