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    SubjectRe: [PATCH V6 1/3] cpuidle: play_idle: Make play_idle more flexible
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    Hi Rafael,


    On 30/10/2019 08:51, Daniel Lezcano wrote:
    > The play_idle function has two users, the intel powerclamp and the
    > idle_injection.
    >
    > The idle injection cooling device uses the function via the
    > idle_injection powercap's APIs. Unfortunately, play_idle is currently
    > limited by the idle state depth: by default the deepest idle state is
    > selected. On the ARM[64] platforms, most of the time it is the cluster
    > idle state, the exit latency and the residency can be very high. That
    > reduces the scope of the idle injection usage because the impact on
    > the performances can be very significant.
    >
    > If the idle injection cycles can be done with a shallow state like a
    > retention state, the cooling effect would eventually give similar
    > results than the cpufreq cooling device.
    >
    > In order to prepare the function to receive an idle state parameter,
    > let's replace the 'use_deepest_state' boolean field with 'use_state'
    > and use this value to enter the specific idle state.
    >
    > The current code keeps the default behavior which is go to the deepest
    > idle state.
    >
    > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
    > Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
    > Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>

    Is it possible to merge this series so I can make some progress on
    upstreaming the idle cooling device which depends on these three patches?

    Thanks

    -- Daniel






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