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| author |   Dirk Brandewie <dirk.j.brandewie@intel.com> | 2014-06-20 07:27:58 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-07-07 01:22:19 +0200 |
| commit | c16ed06024a6e699c332831dd50d8276744e3de8 (patch) | |
| tree | d9780f7ad69431aed8a7457d01bd7a33a69ec333 /Documentation/cpu-freq | |
| parent | cpufreq: unlock when failing cpufreq_update_policy() (diff) | |
| download | linux-dev-c16ed06024a6e699c332831dd50d8276744e3de8.tar.xz linux-dev-c16ed06024a6e699c332831dd50d8276744e3de8.zip | |
intel_pstate: Fix setting VID
Commit 21855ff5 (intel_pstate: Set turbo VID for BayTrail) introduced
setting the turbo VID which is required to prevent a machine check on
some Baytrail SKUs under heavy graphics based workloads. The
docmumentation update that brought the requirement to light also
changed the bit mask used for enumerating P state and VID values from
0x7f to 0x3f.
This change returns the mask value to 0x7f.
Tested with the Intel NUC DN2820FYK,
BIOS version FYBYT10H.86A.0034.2014.0513.1413 with v3.16-rc1 and
v3.14.8 kernel versions.
Fixes: 21855ff5 (intel_pstate: Set turbo VID for BayTrail)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=77951
Reported-and-tested-by: Rune Reterson <rune@megahurts.dk>
Reported-and-tested-by: Eric Eickmeyer <erich@ericheickmeyer.com>
Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/cpu-freq')
0 files changed, 0 insertions, 0 deletions