| Message ID | 20181128060412.630-1-hsinyi@chromium.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | usb/mtu3: power down device ip at setup | expand |
Hi Hsin-Yi, On Wed, 2018-11-28 at 14:04 +0800, Hsin-Yi, Wang wrote: > Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, > so host ip sleep will fail at ssusb_host_disable. > > Power down device ip at ssusb_host_setup. > > Signed-off-by: Hsin-Yi, Wang <hsinyi@chromium.org> > --- > drivers/usb/mtu3/mtu3_host.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c > index c871b94f3e6f..d17cf43305db 100644 > --- a/drivers/usb/mtu3/mtu3_host.c > +++ b/drivers/usb/mtu3/mtu3_host.c > @@ -192,9 +192,17 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) > static void ssusb_host_setup(struct ssusb_mtk *ssusb) > { > struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; > + void __iomem *ibase = ssusb->ippc_base; > > host_ports_num_get(ssusb); > > + /* > + * device ip is default power-on in fact The device ip is power-off by default, no need power down it here. On which platform did you encounter the issue? > + * power down device ip, otherwise ip-sleep will fail > + */ > + if (ssusb->dr_mode == USB_DR_MODE_HOST) > + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); > + > /* > * power on host and power on/enable all ports > * if support OTG, gadget driver will switch port0 to device mode
Hi Chunfeng, On mt8183, We found `ip sleep failed!!!` with powerd_dbus_suspend. Referenced from xhci, it power down device ip at xhci_mtk_ssusb_config(). Also if dr_mode is PERIPHERAL and OTG, they both power down device ip at ssusb_gadget_init(). On Wed, Nov 28, 2018 at 2:22 PM Chunfeng Yun <chunfeng.yun@mediatek.com> wrote: > > Hi Hsin-Yi, > > On Wed, 2018-11-28 at 14:04 +0800, Hsin-Yi, Wang wrote: > > Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, > > so host ip sleep will fail at ssusb_host_disable. > > > > Power down device ip at ssusb_host_setup. > > > > Signed-off-by: Hsin-Yi, Wang <hsinyi@chromium.org> > > --- > > drivers/usb/mtu3/mtu3_host.c | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c > > index c871b94f3e6f..d17cf43305db 100644 > > --- a/drivers/usb/mtu3/mtu3_host.c > > +++ b/drivers/usb/mtu3/mtu3_host.c > > @@ -192,9 +192,17 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) > > static void ssusb_host_setup(struct ssusb_mtk *ssusb) > > { > > struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; > > + void __iomem *ibase = ssusb->ippc_base; > > > > host_ports_num_get(ssusb); > > > > + /* > > + * device ip is default power-on in fact > The device ip is power-off by default, no need power down it here. > > On which platform did you encounter the issue? > > > + * power down device ip, otherwise ip-sleep will fail > > + */ > > + if (ssusb->dr_mode == USB_DR_MODE_HOST) > > + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); > > + > > > > /* > > * power on host and power on/enable all ports > > * if support OTG, gadget driver will switch port0 to device mode > >
On Wed, 2018-11-28 at 14:26 +0800, Hsin-Yi Wang wrote: > Hi Chunfeng, > On mt8183, We found `ip sleep failed!!!` with powerd_dbus_suspend. Did you enable usb device mode in BROM or LK stage? e.g. download image by fastboot / flashtool > Referenced from xhci, it also power down device ip at > xhci_mtk_ssusb_config(). It may happen when user downloads images by usb device in LK/BROM stage, but not disable it before enter kernel stage. > Also if dr_mode is PERIPHERAL and OTG, they both power down device ip > at ssusb_gadget_init(). Yes, it tries to save power; > > On Wed, Nov 28, 2018 at 2:22 PM Chunfeng Yun > <chunfeng.yun@mediatek.com> wrote: > > Hi Hsin-Yi, > > On Wed, 2018-11-28 at 14:04 +0800, Hsin-Yi, Wang wrote: > > Originally, when dr_mode is USB_DR_MODE_HOST, it didn't > power down device ip, > > so host ip sleep will fail at ssusb_host_disable. > > > > Power down device ip at ssusb_host_setup. > > > > Signed-off-by: Hsin-Yi, Wang <hsinyi@chromium.org> > > --- > > drivers/usb/mtu3/mtu3_host.c | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/drivers/usb/mtu3/mtu3_host.c > b/drivers/usb/mtu3/mtu3_host.c > > index c871b94f3e6f..d17cf43305db 100644 > > --- a/drivers/usb/mtu3/mtu3_host.c > > +++ b/drivers/usb/mtu3/mtu3_host.c > > @@ -192,9 +192,17 @@ int ssusb_host_disable(struct ssusb_mtk > *ssusb, bool suspend) > > static void ssusb_host_setup(struct ssusb_mtk *ssusb) > > { > > struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; > > + void __iomem *ibase = ssusb->ippc_base; > > > > host_ports_num_get(ssusb); > > > > + /* > > + * device ip is default power-on in fact > The device ip is power-off by default, no need power down it > here. > > On which platform did you encounter the issue? > > > + * power down device ip, otherwise ip-sleep will fail > > + */ > > + if (ssusb->dr_mode == USB_DR_MODE_HOST) > > + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, > SSUSB_IP_DEV_PDN); > > + Could you please put it in ssusb_ip_sw_reset(), after ip reset, in mtu3_plat.c, if it fix the issue? > > /* > > * power on host and power on/enable all ports > > * if support OTG, gadget driver will switch port0 to > device mode > >
diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c index c871b94f3e6f..d17cf43305db 100644 --- a/drivers/usb/mtu3/mtu3_host.c +++ b/drivers/usb/mtu3/mtu3_host.c @@ -192,9 +192,17 @@ int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend) static void ssusb_host_setup(struct ssusb_mtk *ssusb) { struct otg_switch_mtk *otg_sx = &ssusb->otg_switch; + void __iomem *ibase = ssusb->ippc_base; host_ports_num_get(ssusb); + /* + * device ip is default power-on in fact + * power down device ip, otherwise ip-sleep will fail + */ + if (ssusb->dr_mode == USB_DR_MODE_HOST) + mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN); + /* * power on host and power on/enable all ports * if support OTG, gadget driver will switch port0 to device mode
Originally, when dr_mode is USB_DR_MODE_HOST, it didn't power down device ip, so host ip sleep will fail at ssusb_host_disable. Power down device ip at ssusb_host_setup. Signed-off-by: Hsin-Yi, Wang <hsinyi@chromium.org> --- drivers/usb/mtu3/mtu3_host.c | 8 ++++++++ 1 file changed, 8 insertions(+)