On Wed, Apr 14, 2021 at 07:26:55AM -0700, Badhri Jagan Sridharan wrote: > When a PD charger advertising Rp-3.0 is connected to a sink port, the > sink port current limit would 3A, during SNK_DISCOVERY, till power > negotiation starts. Once the negotiation starts the power limit needs > to drop down to pSnkStby(500mA @ 5V) and to negotiated current limit > once the explicit contract is in place. Not all charging loops can ramp > up to 3A and drop down to 500mA within tSnkStdby which is 15ms. The port > partner might hard reset if tSnkStdby is not met. > > To solve this problem, this patch introduces slow-charger-loop which > when set makes the port request PD_P_SNK_STDBY_MW upon entering > SNK_DISCOVERY(instead of 3A or the 1.5A during SNK_DISCOVERY) and the > actual currrent limit after RX of PD_CTRL_PSRDY for PD link or during > SNK_READY for non-pd link. > > Signed-off-by: Badhri Jagan Sridharan <badhri@xxxxxxxxxx> > Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > --- > Changes since V3: > * Added reviewed-by tag from Heikki No need to add reviewed-by tags, my tools pick that up already. Patches 1 and 2 now queued up. thanks, greg k-h
