From: Kyle Tso kyletso@google.com
[ Upstream commit fe79d5de77204dd946cfad76a9bec23354b1a500 ]
TCPM state machine needs 20-25ms to enter the ErrorRecovery state after tPSSourceOn timer timeouts. Change the timer from max 480ms to 450ms to ensure that the timer complies with the Spec. In order to keep the flexibility for other usecases using tPSSourceOn, add another timer only for PR_SWAP.
Cc: Guenter Roeck linux@roeck-us.net Cc: Heikki Krogerus heikki.krogerus@linux.intel.com Cc: Badhri Jagan Sridharan badhri@google.com Reviewed-by: Guenter Roeck linux@roeck-us.net Acked-by: Heikki Krogerus heikki.krogerus@linux.intel.com Signed-off-by: Kyle Tso kyletso@google.com Signed-off-by: Will McVicker willmcvicker@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Link: https://lore.kernel.org/r/20201210160521.3417426-5-gregkh@linuxfoundation.or... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/typec/tcpm.c | 2 +- include/linux/usb/pd.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 9c901e3b17472..95e4725eaf3f7 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -3455,7 +3455,7 @@ static void run_state_machine(struct tcpm_port *port) tcpm_set_state(port, ERROR_RECOVERY, 0); break; } - tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON); + tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON_PRS); break; case PR_SWAP_SRC_SNK_SINK_ON: tcpm_set_state(port, SNK_STARTUP, 0); diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h index bdf4c88d2aa0a..1a29a7351fbed 100644 --- a/include/linux/usb/pd.h +++ b/include/linux/usb/pd.h @@ -441,6 +441,7 @@ static inline unsigned int rdo_max_power(u32 rdo) #define PD_T_DRP_SRC 30 #define PD_T_PS_SOURCE_OFF 920 #define PD_T_PS_SOURCE_ON 480 +#define PD_T_PS_SOURCE_ON_PRS 450 /* 390 - 480ms */ #define PD_T_PS_HARD_RESET 30 #define PD_T_SRC_RECOVER 760 #define PD_T_SRC_RECOVER_MAX 1000