On Wed, Aug 17, 2022 at 11:23:57AM -0700, Wesley Cheng wrote:
> 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.
>
> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
> ---
> drivers/usb/dwc3/gadget.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 57d83b3b4967..5f250df7066f 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -2444,7 +2444,7 @@ static void __dwc3_gadget_set_speed(struct dwc3 *dwc)
> static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
> {
> u32 reg;
> - u32 timeout = 500;
> + u32 timeout = 2000;
>
> if (pm_runtime_suspended(dwc->dev))
> return 0;
> @@ -2477,6 +2477,7 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
> dwc3_gadget_dctl_write_safe(dwc, reg);
>
> do {
> + usleep_range(1000, 2000);
> reg = dwc3_readl(dwc->regs, DWC3_DSTS);
> reg &= DWC3_DSTS_DEVCTRLHLT;
> } while (--timeout && !(!is_on ^ !reg));
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Thanks,
Thinh