On 9/28/2018 7:05 AM, Hal Emmerich wrote: > From 04fbf78e4e569bf872f1ffcb0a6f9b89569dc913 Mon Sep 17 00:00:00 2001 > From: Hal Emmerich <hal@xxxxxxxxxxxxxxx> > Date: Thu, 19 Jul 2018 21:48:08 -0500 > Subject: [PATCH] usb: dwc2: disable power_down on rockchip devices > > The bug would let the usb controller enter partial power down, > which was formally known as hibernate, upon boot if nothing was plugged > in to the port. Partial power down couldn't be exited properly, so any > usb devices plugged in after boot would not be usable. > > Before the name change, params.hibernation was false by default, so > _dwc2_hcd_suspend() would skip entering hibernation. With the > rename, _dwc2_hcd_suspend() was changed to use params.power_down > to decide whether or not to enter partial power down. > > Since params.power_down is non-zero by default, it needs to be set > to 0 for rockchip devices to restore functionality. > > This bug was reported in the linux-usb thread: > REGRESSION: usb: dwc2: USB device not seen after boot > > The commit that caused this regression is: > 6d23ee9caa6790aea047f9aca7f3c03cb8d96eb6 > > Signed-off-by: Hal Emmerich <hal@xxxxxxxxxxxxxxx> Acked-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx> > --- > drivers/usb/dwc2/params.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c > index f03e41879224..492607adc506 100644 > --- a/drivers/usb/dwc2/params.c > +++ b/drivers/usb/dwc2/params.c > @@ -82,6 +82,7 @@ static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg) > p->host_perio_tx_fifo_size = 256; > p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << > GAHBCFG_HBSTLEN_SHIFT; > + p->power_down = 0; > } > > static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg) > -- > 2.11.0 > >
