On Tue, Apr 5, 2022 at 10:05 PM Brian Norris <briannorris@xxxxxxxxxxxx> wrote: > > Hello again Peter, > > On Fri, Mar 4, 2022 at 6:47 AM Peter Geis <pgwipeout@xxxxxxxxx> wrote: > > Transitions anywhere from the default 800mhz cause a lock. > > > > I'm digging deeper, but I'm hoping you can answer some questions in > > the meantime: > > 1. Does this require something from firmware that isn't available on > > Mainline ATF? (AKA special firmware to the Chromebook line) > > 2. If not, do you have any recommendations off the top of your head? > > I may have a better answer for you now. In the intervening time > period, I've discovered a potentially-relevant bug, involving > interactions between the kernel power-domain driver and ATF. See this > series for my current fixes: > > https://lore.kernel.org/linux-rockchip/20220406014842.2771799-1-briannorris@xxxxxxxxxxxx/ > [RFC PATCH 0/2] rockchip / devfreq: Coordinate DRAM controller > resources between ATF and kernel > > If that happens to help you (it may help, for instance, if your system > was toggling NPLL off/on like mine was; it also may help if you're > hitting a race on PMU_BUS_IDLE_REQ like noticed in patch 1), I'd love > your feedback there. > > It's still possible your problems are completely unrelated though. Thank you, that is certainly possible to be the problem here as well. I won't have time to test them till this weekend, but you can count on my feedback as soon as I get the time to do so. > > Regards, > Brian
