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

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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: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Perry Yuan 2022-08-15 00:35:47 +08:00 committed by Rafael J. Wysocki
parent 0e9a86386b
commit ca08e46d42
1 changed files with 2 additions and 2 deletions
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4
drivers/cpufreq/amd-pstate.c
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@ -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