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: Viresh Kumar <[email protected]>
Signed-off-by: Perry Yuan <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: Perry Yuan

drivers/cpufreq/amd-pstate.c

@@ -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