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    SubjectRe: [PATCH v2 2/2] irqchip: Add Qualcomm MPM controller driver
    On Tue, Nov 30, 2021 at 01:56:02PM +0530, Maulik Shah wrote:
    > Hi,
    >
    > On 11/29/2021 7:15 PM, Shawn Guo wrote:
    > > > This is not limited to suspend, you will need to notify RPM during deepest
    > > > cpu idle state entry as well, since MPM may be monitoring interrupts in that
    > > > case too.
    > > Yeah, I was trying to test this MPM driver with cpuidle, but failed to
    > > see the SoC get into vlow/vmin state from cpuidle.
    >
    > In a few cases SoC can enter vmin/vlow from cpuidle one is from static
    > screen on.
    >
    > > Do you have any
    > > suggestion how I should test it properly?
    > Suspend resume (use "s2idle" and not "deep" mode on upstream kernel) is one
    > good method, but you will have to make sure all drivers have removed votes
    > on xo clock when entering suspend.
    > Also need to make sure other subsystem like modem is in power collaspe (look
    > at the internal master stats driver to know if other subsystems entering to
    > low power mode or not).

    I have already been able to trigger a vmin sleep with s2idle by doing:

    $ echo mem > /sys/power/state

    My question is how I can get a vmin sleep in idle case, so that MPM
    driver can be tested in both suspend and idle context.

    Shawn

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