diff options
| author | Pratik Prajapati <pratikkumar.v.prajapati@intel.com> | 2016-03-08 12:34:06 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-03-29 23:38:36 +0200 |
| commit | 79cfcde4589f4ab07a721c509b9fa59060e091cc (patch) | |
| tree | e6a37513c0ac75954d2110a0f56f170275ff23e8 | |
| parent | 89cc9ce399845382c2180cd6ee8d2482521aeed1 (diff) | |
intel/skylake: Enable PROCHOT
This patch would enable PROCHOT feature in skylake. Asserting
PROCHOT line would throttle the GPU/CPU.
BUG=chrome-os-partner:51142
BRANCH=glados
TEST=manually tested on lars. asserting PROCTHOT by EC
reduces FSP in fish-tank from approx 40 to 20. (50 fish setting),
also CPU freq. drops to from 1600000 to 400000
Change-Id: I8fc0c015ea2c26d20bbbfc619f720f231d540feb
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1b88b1f183df9c7362d7e58acb0a1fa0b076d56e
Original-Change-Id: Ida8636efc3d8da56ebd3931144d31ab1b88fe806
Original-Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/331690
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Original-(cherry picked from commit d091a999c3827179182b62a1274a9b3581f7f006)
Original-Reviewed-on: https://chromium-review.googlesource.com/333073
Original-Commit-Ready: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Original-Tested-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Original-Reviewed-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/14120
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
| -rw-r--r-- | src/soc/intel/skylake/cpu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/cpu.c b/src/soc/intel/skylake/cpu.c index d154f0ec51..38c5b52d5c 100644 --- a/src/soc/intel/skylake/cpu.c +++ b/src/soc/intel/skylake/cpu.c @@ -252,6 +252,12 @@ static void configure_misc(void) msr.lo = 1 << 4; msr.hi = 0; wrmsr(IA32_PACKAGE_THERM_INTERRUPT, msr); + + /* Enable PROCHOT */ + msr = rdmsr(MSR_POWER_CTL); + msr.lo |= (1 << 0); /* Enable Bi-directional PROCHOT as an input*/ + msr.lo |= (1 << 23); /* Lock it */ + wrmsr(MSR_POWER_CTL, msr); } static void enable_lapic_tpr(void) |