Commit ca08e46d authored by Perry Yuan's avatar Perry Yuan Committed by Rafael J. Wysocki
Browse files

cpufreq: amd-pstate: update pstate frequency transition delay time 



Change the default transition latency to be 20ms that is more
reasonable transition delay for AMD processors in non-EPP driver mode.

Update transition delay time to 1ms, in the AMD CPU autonomous mode and
non-autonomous mode, CPPC firmware will decide frequency at 1ms timescale
based on the workload utilization.

Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarPerry Yuan <Perry.Yuan@amd.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 0e9a8638

drivers/cpufreq/amd-pstate.c

+2 −2
Original line number Diff line number Diff line
@@ -46,8 +46,8 @@ 
#include <asm/cpu_device_id.h>

#include "amd-pstate-trace.h"



#define AMD_PSTATE_TRANSITION_LATENCY	0x20000

#define AMD_PSTATE_TRANSITION_DELAY	500

#define AMD_PSTATE_TRANSITION_LATENCY	20000

#define AMD_PSTATE_TRANSITION_DELAY	1000



/*

 * TODO: We need more time to fine tune processors with shared memory solution