On 18 March 2021 20:40, Badhri Jagan Sridharan wrote: > > Regarding selecting PDOs or PPS APDOs, surely we should only notify of a > change > > when we reach SNK_READY which means a new contract has been established? > Until > > that point it's possible any requested change could be rejected so why inform > > clients before we know the settings have taken effect? I could be missing > > something here as it's been a little while since I delved into this, but this > > doesn't seem to make sense to me. > > I was trying to keep the power_supply_changed call close to the > variables which are used to infer the power supply property values. > Since port->pps_data.max_curr is already updated here and that's used > to infer the CURRENT_MAX a client could still read this before the > request goes through right ? Actually that's fair but I think the problem here relates to 'max_curr' not being reset if the SRC rejects our request when we're swapping between one PPS APDO and another PPS APDO. I think the 'max_curr' value should be reverted back to the value for the existing PPS APDO we were already using. I suspect the same might be true of 'min_volt' and 'max_volt' as well, now I look at it. It might actually be prudent to have pending PPS data based on a request, which is only committed as active once ACCEPT has been received. Regarding power_supply_changed() though, I still think we should only notify of a change when the requested change has been accepted by the source, in relation to these values as they should reflect the real, in-use voltage and current values.
