commit bd824e4cc34c60cc22cb61faee8c2364f44b1568
author Tim Murray <timmurray@google.com> Mon Oct 05 13:56:03 2015 -0700
committer Tim Murray <timmurray@google.com> Mon Oct 05 13:56:03 2015 -0700
tree f8bd88798f15ef92d31563458d7e06f40b306ed6
parent ef33232368043467dfde13149035f4ac7a158171

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: I50693c153a11ede4a00e931f08e5b1c6d6096326

power/power-8992.c

diff --git a/power/power-8992.c b/power/power-8992.c
index 53d8179..46febc9 100644
--- a/power/power-8992.c
+++ b/power/power-8992.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]));