Commit aa7ffc01 authored May 14, 2010 by Jesse Barnes Committed by Matthew Garrett Aug 03, 2010

x86 platform driver: intelligent power sharing driver

Intel Core i3/5 platforms with integrated graphics support both CPU and
GPU turbo mode. CPU turbo mode is opportunistic: the CPU will use any
available power to increase core frequencies if thermal headroom is
available. The GPU side is more manual however; the graphics driver
must monitor GPU power and temperature and coordinate with a core
thermal driver to take advantage of available thermal and power headroom
in the package.

The intelligent power sharing (IPS) driver is intended to coordinate
this activity by monitoring MCP (multi-chip package) temperature and
power, allowing the CPU and/or GPU to increase their power consumption,
and thus performance, when possible. The goal is to maximize
performance within a given platform's TDP (thermal design point).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

parent 8cadd283

drivers/platform/x86/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -539,4 +539,14 @@ config INTEL_SCU_IPC
		some embedded Intel x86 platforms. This is not needed for PC-type
		machines.

		config INTEL_IPS
		tristate "Intel Intelligent Power Sharing"
		depends on ACPI
		---help---
		Intel Calpella platforms support dynamic power sharing between the
		CPU and GPU, maximizing performance in a given TDP. This driver,
		along with the CPU frequency and i915 drivers, provides that
		functionality. If in doubt, say Y here; it will only load on
		supported platforms.

		endif # X86_PLATFORM_DEVICES

drivers/platform/x86/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -26,3 +26,4 @@ obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
		obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
		obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o
		obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o
		obj-$(CONFIG_INTEL_IPS) += intel_ips.o