Srinivas Pandruvada
a5ec5a7bfd
ata: ahci: Support state with min power but Partial low power state
...
Currently when min_power policy is selected, the partial low power state
is not entered and link will try aggressively enter to only slumber state.
Add a new policy which still enable DEVSLP but also try to enter partial
low power state. This policy is presented as "min_power_with_partial".
For information the difference between partial and slumber
Partial – PHY logic is powered up, and in a reduced power state. The link
PM exit latency to active state maximum is 10 ns.
Slumber – PHY logic is powered up, and in a reduced power state. The link
PM exit latency to active state maximum is 10 ms.
Devslp – PHY logic is powered down. The link PM exit latency from this
state to active state maximum is 20 ms, unless otherwise specified by
DETO.
Suggested-and-reviewed-by: Hans de Goede <hdegoede@redhat.com >
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com >
Signed-off-by: Tejun Heo <tj@kernel.org >
2018-07-30 07:09:10 -07:00
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