Messages in this thread | | | From | Brian Norris <> | Date | Tue, 5 Apr 2022 19:05:33 -0700 | Subject | Re: [PATCH v2 12/15] arm64: dts: rockchip: Enable dmc and dfi nodes on gru |
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Hello again Peter,
On Fri, Mar 4, 2022 at 6:47 AM Peter Geis <pgwipeout@gmail.com> 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@chromium.org/ [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.
Regards, Brian
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