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| author | Badhri Jagan Sridharan <badhri@google.com> | 2021-05-11 00:17:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 16:01:04 +0300 |
| commit | 12701ce524bc9b7c6345a2425208501fd2c62aad (patch) | |
| tree | bf9bf8f9422857472cfc70633d575c3a8453ae99 /Documentation | |
| parent | 3c128781d8da463761495aaf8898c9ecb4e71528 (diff) | |
| download | linux-12701ce524bc9b7c6345a2425208501fd2c62aad.tar.xz | |
usb: typec: tcpm: Fix SINK_DISCOVERY current limit for Rp-default
This is a regression introduced by 1373fefc6243 ("usb: typec: tcpm:
Allow slow charging loops to comply to pSnkStby")
When Source advertises Rp-default, tcpm would request 500mA when in
SINK_DISCOVERY, Type-C spec advises the sink to follow BC1.2 current
limits when Rp-default is advertised.
[12750.503381] Requesting mux state 1, usb-role 2, orientation 1
[12750.503837] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
[12751.003891] state change SNK_STARTUP -> SNK_DISCOVERY
[12751.003900] Setting voltage/current limit 5000 mV 500 mA
This patch restores the behavior where the tcpm would request 0mA when
Rp-default is advertised by the source.
[ 73.174252] Requesting mux state 1, usb-role 2, orientation 1
[ 73.174749] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
[ 73.674800] state change SNK_STARTUP -> SNK_DISCOVERY
[ 73.674808] Setting voltage/current limit 5000 mV 0 mA
During SNK_DISCOVERY, Cap the current limit to PD_P_SNK_STDBY_MW / 5 only
for slow_charger_loop case.
Fixes: 1373fefc6243 ("usb: typec: tcpm: Allow slow charging loops to comply to pSnkStby")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210510211756.3346954-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions