platform/x86/intel/pmc: Disable C1 auto-demotion during suspend

Browse source

On some platforms, aggressive C1 auto-demotion may lead to failure to enter
the deepest C-state during suspend-to-idle, causing high power consumption.
To prevent this, disable C1 auto-demotion during suspend and re-enable on
resume.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20241017210439.3449324-2-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

...

This commit is contained in:

David E. Box 2024-10-17 14:04:38 -07:00 • committed by Ilpo Järvinen

parent 9fe43c8020

commit 7a797cc9f8

No known key found for this signature in database

GPG key ID: 59AC4F6153E5CE31

1 changed files with 53 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

53

drivers/platform/x86/intel/pmc/cnp.c

View file