Badhri Jagan Sridharan 1230868433 usb: typec: tcpm: Honour pSnkStdby requirement during negotiation ... >From PD Spec: The Sink Shall transition to Sink Standby before a positive or negative voltage transition of VBUS. During Sink Standby the Sink Shall reduce its power draw to pSnkStdby. This allows the Source to manage the voltage transition as well as supply sufficient operating current to the Sink to maintain PD operation during the transition. The Sink Shall complete this transition to Sink Standby within tSnkStdby after evaluating the Accept Message from the Source. The transition when returning to Sink operation from Sink Standby Shall be completed within tSnkNewPower. The pSnkStdby requirement Shall only apply if the Sink power draw is higher than this level. The above requirement needs to be met to prevent hard resets from port partner. Without the patch: (5V/3A during SNK_DISCOVERY all the way through explicit contract) [ 95.711984] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected] [ 95.712007] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 95.712017] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS] [ 95.837190] VBUS on [ 95.882075] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms] [ 95.882082] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS] [ 95.882086] polarity 1 [ 95.883151] set_auto_vbus_discharge_threshold mode:0 pps_active:n vbus:5000 ret:0 [ 95.883441] enable vbus discharge ret:0 [ 95.883445] Requesting mux state 1, usb-role 2, orientation 2 [ 95.883776] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS] [ 95.883879] pending state change SNK_STARTUP -> SNK_DISCOVERY @ 500 ms [rev3 NONE_AMS] [ 96.038960] VBUS on [ 96.383939] state change SNK_STARTUP -> SNK_DISCOVERY [delayed 500 ms] [ 96.383946] Setting voltage/current limit 5000 mV 3000 mA [ 96.383961] vbus=0 charge:=1 [ 96.386044] state change SNK_DISCOVERY -> SNK_WAIT_CAPABILITIES [rev3 NONE_AMS] [ 96.386309] pending state change SNK_WAIT_CAPABILITIES -> HARD_RESET_SEND @ 450 ms [rev3 NONE_AMS] [ 96.394404] PD RX, header: 0x2161 [1] [ 96.394408] PDO 0: type 0, 5000 mV, 3000 mA [E] [ 96.394410] PDO 1: type 0, 9000 mV, 2000 mA [] [ 96.394412] state change SNK_WAIT_CAPABILITIES -> SNK_NEGOTIATE_CAPABILITIES [rev2 POWER_NEGOTIATION] [ 96.394416] Setting usb_comm capable false [ 96.395083] cc=0 cc1=0 cc2=5 vbus=0 vconn=sink polarity=1 [ 96.395089] Requesting PDO 1: 9000 mV, 2000 mA [ 96.395093] PD TX, header: 0x1042 [ 96.397404] PD TX complete, status: 0 [ 96.397424] pending state change SNK_NEGOTIATE_CAPABILITIES -> HARD_RESET_SEND @ 60 ms [rev2 POWER_NEGOTIATION] [ 96.400826] PD RX, header: 0x363 [1] [ 96.400829] state change SNK_NEGOTIATE_CAPABILITIES -> SNK_TRANSITION_SINK [rev2 POWER_NEGOTIATION] [ 96.400832] pending state change SNK_TRANSITION_SINK -> HARD_RESET_SEND @ 500 ms [rev2 POWER_NEGOTIATION] [ 96.577315] PD RX, header: 0x566 [1] [ 96.577321] Setting voltage/current limit 9000 mV 2000 mA [ 96.578363] set_auto_vbus_discharge_threshold mode:3 pps_active:n vbus:9000 ret:0 [ 96.578370] state change SNK_TRANSITION_SINK -> SNK_READY [rev2 POWER_NEGOTIATION] With the patch: [ 168.398573] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected] [ 168.398605] state change TOGGLING -> SNK_ATTACH_WAIT [rev3 NONE_AMS] [ 168.398619] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev3 NONE_AMS] [ 168.522348] VBUS on [ 168.568676] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms] [ 168.568684] state change SNK_DEBOUNCED -> SNK_ATTACHED [rev3 NONE_AMS] [ 168.568688] polarity 1 [ 168.569867] set_auto_vbus_discharge_threshold mode:0 pps_active:n vbus:5000 ret:0 [ 168.570158] enable vbus discharge ret:0 [ 168.570161] Requesting mux state 1, usb-role 2, orientation 2 [ 168.570504] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS] [ 168.570634] pending state change SNK_STARTUP -> SNK_DISCOVERY @ 500 ms [rev3 NONE_AMS] [ 169.070689] state change SNK_STARTUP -> SNK_DISCOVERY [delayed 500 ms] [ 169.070695] Setting voltage/current limit 5000 mV 3000 mA [ 169.070702] vbus=0 charge:=1 [ 169.072719] state change SNK_DISCOVERY -> SNK_WAIT_CAPABILITIES [rev3 NONE_AMS] [ 169.073145] pending state change SNK_WAIT_CAPABILITIES -> HARD_RESET_SEND @ 450 ms [rev3 NONE_AMS] [ 169.077162] PD RX, header: 0x2161 [1] [ 169.077172] PDO 0: type 0, 5000 mV, 3000 mA [E] [ 169.077178] PDO 1: type 0, 9000 mV, 2000 mA [] [ 169.077183] state change SNK_WAIT_CAPABILITIES -> SNK_NEGOTIATE_CAPABILITIES [rev2 POWER_NEGOTIATION] [ 169.077191] Setting usb_comm capable false [ 169.077753] cc=0 cc1=0 cc2=5 vbus=0 vconn=sink polarity=1 [ 169.077759] Requesting PDO 1: 9000 mV, 2000 mA [ 169.077762] PD TX, header: 0x1042 [ 169.079990] PD TX complete, status: 0 [ 169.080013] pending state change SNK_NEGOTIATE_CAPABILITIES -> HARD_RESET_SEND @ 60 ms [rev2 POWER_NEGOTIATION] [ 169.083183] VBUS on [ 169.084195] PD RX, header: 0x363 [1] [ 169.084200] state change SNK_NEGOTIATE_CAPABILITIES -> SNK_TRANSITION_SINK [rev2 POWER_NEGOTIATION] [ 169.084206] Setting standby current 5000 mV @ 500 mA [ 169.084209] Setting voltage/current limit 5000 mV 500 mA [ 169.084220] pending state change SNK_TRANSITION_SINK -> HARD_RESET_SEND @ 500 ms [rev2 POWER_NEGOTIATION] [ 169.260222] PD RX, header: 0x566 [1] [ 169.260227] Setting voltage/current limit 9000 mV 2000 mA [ 169.261315] set_auto_vbus_discharge_threshold mode:3 pps_active:n vbus:9000 ret:0 [ 169.261321] state change SNK_TRANSITION_SINK -> SNK_READY [rev2 POWER_NEGOTIATION] [ 169.261570] AMS POWER_NEGOTIATION finished Fixes: f0690a25a1 ("staging: typec: USB Type-C Port Manager (tcpm)") Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> Link: https://lore.kernel.org/r/20210414024000.4175263-1-badhri@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-04-14 16:27:29 +02:00
..
audio-v2.h
audio-v3.h
audio.h
c67x00.h
ccid.h
cdc-wdm.h
cdc.h
cdc_ncm.h
ch9.h	usb: common: move function's kerneldoc next to its definition	2021-03-10 09:37:17 +01:00
chipidea.h
composite.h	Kbuild updates for v5.12	2021-02-25 10:17:31 -08:00
ehci-dbgp.h
ehci_def.h
ehci_pdriver.h	usb: ehci: add spurious flag to disable overcurrent checking	2021-03-23 12:36:17 +01:00
ezusb.h
functionfs.h
g_hid.h
gadget.h
gadget_configfs.h
hcd.h
input.h
iowarrior.h
irda.h
isp116x.h
isp1301.h
isp1362.h
isp1760.h
m66592.h
musb-ux500.h
musb.h
net2280.h
of.h
ohci_pdriver.h
otg-fsm.h
otg.h
pd.h	usb: typec: tcpm: Honour pSnkStdby requirement during negotiation	2021-04-14 16:27:29 +02:00
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
sl811.h
storage.h
tcpm.h
tegra_usb_phy.h
typec.h	usb: typec: Add typec_port_register_altmodes()	2021-04-09 16:07:41 +02:00
typec_altmode.h
typec_dp.h
typec_mux.h
typec_tbt.h
uas.h
ulpi.h
usb338x.h
usb_phy_generic.h
usbnet.h
xhci-dbgp.h