On Sat, Dec 26 2020 at 05:33 -0700, Ulf Hansson wrote:
On Fri, 25 Dec 2020 at 02:31, Lina Iyer <ilina@xxxxxxxxxxxxxx> wrote:
On Tue, Dec 22 2020 at 03:16 -0700, Ulf Hansson wrote:
>On Wed, 16 Dec 2020 at 18:51, Lina Iyer <ilina@xxxxxxxxxxxxxx> wrote:
>>
>> In order to debug critical domain and device power issues, it may be
>> necessary to disallow certain idle states at runtime. Let the device
>> disallow a domain idle state before suspending.The domain governor shall
>> check for the 'disabled' flag while determining the domain idle state.
>
>For debug purposes, you might as well just set a dev PM Qos latency
>request that corresponds to the state you want to disable. This will
>then prevent the genpd governor from selecting the state.
>
True, but it will also disable idle states deeper as well. Would like to
avoid that.
I see. In any case, I am not so excited about adding an exported genpd
interface for this that drivers can call, for example.
Then I would rather see a proper debugfs interface, where userspace
can both see the available states and choose which one to
disable/enable. Would that work?
Sure, that would work. Any recommendations for existing debugfs node
that we can add this to or something new?
--Lina
