commit 7f67479423cf079825a82b88ecbd8024c1cd0adf
author Tim Murray <timmurray@google.com> Mon Sep 28 17:23:30 2015 -0700
committer Tim Murray <timmurray@google.com> Mon Oct 05 10:37:25 2015 -0700
tree 2c15ef53cfaa4bc87ed3741c8faca8f5f22d096f
parent ab178dda3bef55a7c71cf9ef9c98d4d0ed238a4f

Modify screen-off behavior.

Set sched_upmigrate to 99 and sched_downmigrate to 95 when the screen is
off. This will make it harder to use the big cores when the screen is
off (saving power), but will still allow them to be used in case there
is actually a heavyweight task running.

bug 24130678

Change-Id: I8a8638f62e18cc8fac819d95c17e97ed4ff7e193

power/power-8994.c

diff --git a/power/power-8994.c b/power/power-8994.c
index 53d8179..46febc9 100644
--- a/power/power-8994.c
+++ b/power/power-8994.c
@@ -177,7 +177,6 @@
 
 int set_interactive_override(struct power_module *module, int on)
 {
-    return HINT_HANDLED; /* Don't excecute this code path, not in use */
     char governor[80];
 
     if (get_scaling_governor(governor, sizeof(governor)) == -1) {
@@ -190,7 +189,9 @@
         /* Display off */
         if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
             (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
-            int resource_values[] = {}; /* dummy node */
+            // sched upmigrate = 99, sched downmigrate = 95
+            // keep the big cores around, but make them very hard to use
+            int resource_values[] = {0x4E63, 0x4F5F};
             if (!display_hint_sent) {
                 perform_hint_action(DISPLAY_STATE_HINT_ID,
                 resource_values, sizeof(resource_values)/sizeof(resource_values[0]));