Badhri Jagan Sridharan 599f008c25 usb: typec: tcpm: Add callbacks to mitigate wakeups due to contaminant ... On some of the TCPC implementations, when the Type-C port is exposed to contaminants, such as water, TCPC stops toggling while reporting OPEN either by the time TCPM reads CC pin status or during CC debounce window. This causes TCPM to be stuck in TOGGLING state. If TCPM is made to restart toggling, the behavior recurs causing redundant CPU wakeups till the USB-C port is free of contaminant. [206199.287817] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [206199.640337] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [206199.985789] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] (or) [ 7853.867577] Start toggling [ 7853.889921] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [ 7855.698765] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected] [ 7855.698790] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 7855.698826] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS] [ 7855.703559] CC1: 0 -> 0, CC2: 5 -> 5 [state SNK_ATTACH_WAIT, polarity 0, connected] [ 7855.856555] CC1: 0 -> 0, CC2: 5 -> 0 [state SNK_ATTACH_WAIT, polarity 0, disconnected] [ 7855.856581] state change SNK_ATTACH_WAIT -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 7855.856613] pending state change SNK_ATTACH_WAIT -> SNK_UNATTACHED @ 170 ms [rev3 NONE_AMS] [ 7856.027744] state change SNK_ATTACH_WAIT -> SNK_UNATTACHED [delayed 170 ms] [ 7856.181949] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [ 7856.187896] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [ 7857.645630] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected] [ 7857.647291] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected] [ 7857.647298] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 7857.647310] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS] [ 7857.808106] CC1: 0 -> 0, CC2: 5 -> 0 [state SNK_ATTACH_WAIT, polarity 0, disconnected] [ 7857.808123] state change SNK_ATTACH_WAIT -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 7857.808150] pending state change SNK_ATTACH_WAIT -> SNK_UNATTACHED @ 170 ms [rev3 NONE_AMS] [ 7857.978727] state change SNK_ATTACH_WAIT -> SNK_UNATTACHED [delayed 170 ms] To mitigate redundant TCPM wakeups, TCPCs which do have the needed hardware can implement the check_contaminant callback which is invoked by TCPM to evaluate for presence of contaminant. Lower level TCPC driver can restart toggling through TCPM_PORT_CLEAN event when the driver detects that USB-C port is free of contaminant. check_contaminant callback also passes the disconnect_while_debounce flag which when true denotes that the CC pins transitioned to OPEN state during the CC debounce window. Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20230114093246.1933321-1-badhri@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-01-17 17:29:23 +01:00
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audio-v2.h
audio-v3.h
audio.h
c67x00.h
ccid.h
cdc-wdm.h
cdc.h
cdc_ncm.h
ch9.h
chipidea.h	usb: chipidea: Add support for VBUS control with PHY	2022-08-31 09:07:52 +02:00
composite.h
ehci-dbgp.h
ehci_def.h
ehci_pdriver.h
ezusb.h
functionfs.h
g_hid.h
gadget.h
gadget_configfs.h
hcd.h	xhci: disable U3 suspended ports in S4 hibernate poweroff_late stage	2022-11-30 12:10:48 +01:00
input.h
iowarrior.h
irda.h
isp116x.h
isp1301.h
isp1362.h
m66592.h
musb-ux500.h
musb.h
net2280.h
of.h
ohci_pdriver.h
onboard_hub.h
otg-fsm.h
otg.h
pd.h
pd_ado.h
pd_bdo.h
pd_ext_sdb.h
pd_vdo.h
phy.h
phy_companion.h
quirks.h
r8a66597.h
r8152.h
renesas_usbhs.h
rndis_host.h
role.h
serial.h	usb: serial: Make ->set_termios() old ktermios const	2022-08-30 14:22:35 +02:00
sl811.h
storage.h
tcpci.h	usb: typec: tcpci: Move function "tcpci_to_typec_cc" to common	2022-08-19 11:05:12 +02:00
tcpm.h	usb: typec: tcpm: Add callbacks to mitigate wakeups due to contaminant	2023-01-17 17:29:23 +01:00
tegra_usb_phy.h
typec.h	usb: typec: Add partner PD object wrapper	2022-11-29 08:56:09 +01:00
typec_altmode.h
typec_dp.h	usb: typec: altmodes/displayport: correct pin assignment for UFP receptacles	2022-08-18 21:20:07 +02:00
typec_mux.h
typec_retimer.h
typec_tbt.h
uas.h
ulpi.h
usb338x.h
usb_phy_generic.h
usbnet.h	SPDX changes for 6.0-rc1	2022-08-04 12:12:54 -07:00
xhci-dbgp.h