Messages in this thread | | | Date | Mon, 5 Sep 2022 10:05:43 +0530 | From | Viresh Kumar <> | Subject | Re: [PATCH 0/2] opp: core: add regulators enable and disable |
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On 03-09-22, 22:35, Clément Péron wrote: > Today, I compiled my kernel without any program requiring GPU > computing at boot. This makes the dev_pm_opp_set_rate() to never be > called and so the regulator is not enabled before the regulator > framework switches off all the regulators that haven't been enabled. > > Unfortunately switching off the GPU regulator makes my board hang..
Why does the board hang? I mean the kernel should boot fine with the GPU disabled, isn't it ? Or is the regulator shared with some other critical resource, or something else.
> I'm not sure what is the best approach to fix this. > > Is it required that the dev_pm_opp_set_rate() must be called one time > at the GPU driver init?
Right now, Yes. And it looks like the right approach as well.
> Panfost already calls devfreq_recommended_opp() and dev_pm_opp_put() > but that doesn't trigger dev_pm_opp_set_rate().
Can you also point to your code ? Which file are you working on ?
-- viresh
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