drm/i915/skl: enable PC9/10 power states during suspend-to-idle

Browse source

During suspend-to-idle we need to keep the DMC firmware active and DC6
enabled, since otherwise we won't reach deep system power states like
PC9/10. The lead for this came from Nivedita who noticed that the
kernel's turbostat tool didn't report any PC9/10 residency change
across an 'echo freeze > /sys/power/state'.

Reported-by: Nivedita Swaminathan <nivedita.swaminathan@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1447860750-18110-1-git-send-email-imre.deak@intel.com

...

This commit is contained in:

Imre Deak 2015-11-18 17:32:30 +02:00

parent 92907cbbef

commit bc87229f32

2 changed files with 35 additions and 10 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

44

drivers/gpu/drm/i915/i915_drv.c

View file

1

drivers/gpu/drm/i915/i915_drv.h

View file