Neil Armstrong 831494cb2c usb: dwc3: core: add support for disabling SS instances in park mode ... [ Upstream commit 7ba6b09fda ] In certain circumstances, the XHCI SuperSpeed instance in park mode can fail to recover, thus on Amlogic G12A/G12B/SM1 SoCs when there is high load on the single XHCI SuperSpeed instance, the controller can crash like: xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command. xhci-hcd xhci-hcd.0.auto: Host halt failed, -110 xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command. hub 2-1.1:1.0: hub_ext_port_status failed (err = -22) xhci-hcd xhci-hcd.0.auto: HC died; cleaning up usb 2-1.1-port1: cannot reset (err = -22) Setting the PARKMODE_DISABLE_SS bit in the DWC3_USB3_GUCTL1 mitigates the issue. The bit is described as : "When this bit is set to '1' all SS bus instances in park mode are disabled" Synopsys explains: The GUCTL1.PARKMODE_DISABLE_SS is only available in dwc_usb3 controller running in host mode. This should not be set for other IPs. This can be disabled by default based on IP, but I recommend to have a property to enable this feature for devices that need this. CC: Dongjin Kim <tobetter@gmail.com> Cc: Jianxin Pan <jianxin.pan@amlogic.com> Cc: Thinh Nguyen <thinhn@synopsys.com> Cc: Jun Li <lijun.kernel@gmail.com> Reported-by: Tim <elatllat@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Felipe Balbi <balbi@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-04-17 10:48:41 +02:00
..
core.c	usb: dwc3: core: add support for disabling SS instances in park mode	2020-04-17 10:48:41 +02:00
core.h	usb: dwc3: core: add support for disabling SS instances in park mode	2020-04-17 10:48:41 +02:00
debug.h	usb: dwc3: debugfs: Properly print/set link state for HS	2019-12-13 08:51:45 +01:00
debugfs.c	usb: dwc3: debugfs: Properly print/set link state for HS	2019-12-13 08:51:45 +01:00
drd.c
dwc3-exynos.c
dwc3-haps.c
dwc3-keystone.c
dwc3-of-simple.c
dwc3-omap.c
dwc3-pci.c	usb: dwc3: pci: add ID for the Intel Comet Lake -V variant	2020-02-01 09:37:01 +00:00
dwc3-qcom.c
dwc3-st.c
ep0.c	usb: dwc3: ep0: Clear started flag on completion	2019-12-17 20:34:45 +01:00
gadget.c	usb: dwc3: don't set gadget->is_otg flag	2020-04-13 10:45:16 +02:00
gadget.h	usb: dwc3: gadget: introduce cancelled_list	2019-07-03 13:14:44 +02:00
host.c
io.h
Kconfig	usb: dwc3: Allow building USB_DWC3_QCOM without EXTCON	2020-01-27 14:51:22 +01:00
Makefile
trace.c
trace.h
ulpi.c