| commit | d96f94c604453f87fe24154b87e1e9a3a72511f8 | |
| author | Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> | |
| Mon, 2 Feb 2009 19:57:18 +0000 (2 11:57 -0800) | ||
| committer | Len Brown <len.brown@intel.com> | |
| Sat, 7 Feb 2009 05:41:14 +0000 (7 00:41 -0500) | ||
| tree | 35147bdc37eefdd7b0c8e9185ecc0ded219ff532 | treesnapshot (tar.gz zip) |
| parent | db1461ad431f0fd21afcd8ea6594ae38fdc57759 | commitdiff |
ACPI: Enable bit 11 in _PDC to advertise hw coord
Bit 11 in intel PDC definitions is meant for OS capability to handle
hardware coordination of P-states. In Linux we have always supported
hwardware coordination of P-states. Just let the BIOSes know that we
support it, by setting this bit.
Some BIOSes use this bit to choose between hardware or software coordination
and without this change below, BIOSes switch to software coordination, which
is not very optimal in terms of power consumption and extra wakeups from idle.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Bit 11 in intel PDC definitions is meant for OS capability to handle
hardware coordination of P-states. In Linux we have always supported
hwardware coordination of P-states. Just let the BIOSes know that we
support it, by setting this bit.
Some BIOSes use this bit to choose between hardware or software coordination
and without this change below, BIOSes switch to software coordination, which
is not very optimal in terms of power consumption and extra wakeups from idle.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| include/acpi/pdc_intel.h | diffblobblamehistory |