Re: [PATCH/RFC 3/6] drivers: firmware: psci: Implement shallow suspend mode

From: Pavel Machek
Date: Tue Feb 21 2017 - 06:07:43 EST


> Enable support for "shallow" suspend mode, also known as "Standby" or
> "Power-On Suspend".
> As secondary CPU cores are taken offline, "shallow" suspend mode saves
> slightly more power than "s2idle", but less than "deep" suspend mode.
> However, unlike "deep" suspend mode, "shallow" suspend mode can be used
> regardless of the presence of support for PSCI_SYSTEM_SUSPEND, which is
> an optional API in PSCI v1.0.

If system supports "shallow" suspend, why does not PSCI implement it?

In the past, I was told PSCI will not turn into ACPI-like mess, and
that we'll be able to fix PSCI and will not have to work around its
problems in kernel :-(.

Not your fault, Mark made those promises.

(cesky, pictures)

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