Commit fd77d7fd authored by Srinivas Pandruvada's avatar Srinivas Pandruvada
Browse files

tools/power/x86/intel-speed-select: Set TRL MSR in 100 MHz units 



When SST-TF is disabled in auto mode, the performance is getting
limited.

This is caused by wrong programming of Turbo Ratio Limit (TRL) MSR.

This MSR always accepts the frequency ratio in 100 MHz unit. When the
TPMI is sending TRL in 1 MHz unit, change to 100 MHz, before updating
TRL MSR.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
parent cf25477c

tools/power/x86/intel-speed-select/isst-core.c

+6 −0
Original line number Diff line number Diff line
@@ -283,6 +283,8 @@ int isst_set_trl(struct isst_id *id, unsigned long long trl) 
	return 0;

}



#define MSR_TRL_FREQ_MULTIPLIER		100



int isst_set_trl_from_current_tdp(struct isst_id *id, unsigned long long trl)

{

	unsigned long long msr_trl;
@@ -310,6 +312,10 @@ int isst_set_trl_from_current_tdp(struct isst_id *id, unsigned long long trl) 
		for (i = 0; i < 8; ++i) {

			unsigned long long _trl = trl[i];



			/* MSR is always in 100 MHz unit */

			if (isst_get_disp_freq_multiplier() == 1)

				_trl /= MSR_TRL_FREQ_MULTIPLIER;



			msr_trl |= (_trl << (i * 8));

		}

	}