Commit 4042e757 authored by Dirk Brandewie's avatar Dirk Brandewie Committed by Rafael J. Wysocki

intel_pstate: Use LFM bus ratio as min ratio/P state

LFM (max efficiency ratio) is the max frequency at minimum voltage
supported by the processor.  Using LFM as the minimum P state
increases performmance without affecting power. By not using P states
below LFM we avoid using P states that are less power efficient.
Signed-off-by: default avatarDirk Brandewie <dirk.j.brandewie@intel.com>
Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c3274763
...@@ -357,7 +357,7 @@ static int byt_get_min_pstate(void) ...@@ -357,7 +357,7 @@ static int byt_get_min_pstate(void)
{ {
u64 value; u64 value;
rdmsrl(BYT_RATIOS, value); rdmsrl(BYT_RATIOS, value);
return value & 0xFF; return (value >> 8) & 0xFF;
} }
static int byt_get_max_pstate(void) static int byt_get_max_pstate(void)
......
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